In this episode I discuss methods of stripping the Bayer Color Filter Array (CFA) from the Raspberry picamera, for use in my Raspberry Pi Spectrometer: youtu.be/T_goVwwxKE4 I cover physical removal, chemical removal with EKC 830 and Laser stripping. I demo an experimental home made Laser stripping machine, like a miniature CNC, using the MNL-100 Nitrogen Laser I tore down and hacked here: youtu.be/k5MOAKHPVG8
Does it work? Can you use the Picamera to image in the Ultraviolet? Watch the video to find out!
Thanks to the people who nudged me a little (White Shadow (see comments), colleagues and friends) I published this work in the IEEE: doi.org/10.1109/lsens.2022.3231931
If you found this content useful, and would like to support this Channel, please consider supporting this work on Patreon: patreon.com/leslaboratory Or donate directly: paypal.me/leslaboratory Alternatively, please share this content on your social media platforms, it really helps me out!
References: Ultraviolet Imaging with Low Cost Smartphone Sensors: Development and Application of a Raspberry Pi-Based UV Camera Thomas C. Wilkes , Andrew J. S. McGonigle , Tom D. Pering , Angus J. Taggart ,Benjamin S. White, Robert G. Bryant and Jon R. Willmott doi.org/10.3390/s16101649 mdpi.com/1424-8220/16/10/1649/htm
Excimer laser photoresist stripping Menachem Genut, Ofer Tehar-Zahav, Eli Iskevitch, Boris Livshits Proceedings Volume 2724, Advances in Resist Technology and Processing XIII; (1996) doi.org/10.1117/12.241858
Check out my other videos: youtube.com/leslaboratory Please don't forget to like,subscribe and comment for more great content!
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Music in this video: 8-Bit March by Twin Musicom is licensed under a Creative Commons Attribution 4.0 license. creativecommons.org/licenses/by/4.0
Bayer filter removal on a Pi Camera: Laser stripping, CFA removal, debayering, and UV conversion.Les Lab2021-08-07 | Episode 30 #laser #raspberrypi
In this episode I discuss methods of stripping the Bayer Color Filter Array (CFA) from the Raspberry picamera, for use in my Raspberry Pi Spectrometer: youtu.be/T_goVwwxKE4 I cover physical removal, chemical removal with EKC 830 and Laser stripping. I demo an experimental home made Laser stripping machine, like a miniature CNC, using the MNL-100 Nitrogen Laser I tore down and hacked here: youtu.be/k5MOAKHPVG8
Does it work? Can you use the Picamera to image in the Ultraviolet? Watch the video to find out!
Thanks to the people who nudged me a little (White Shadow (see comments), colleagues and friends) I published this work in the IEEE: doi.org/10.1109/lsens.2022.3231931
If you found this content useful, and would like to support this Channel, please consider supporting this work on Patreon: patreon.com/leslaboratory Or donate directly: paypal.me/leslaboratory Alternatively, please share this content on your social media platforms, it really helps me out!
References: Ultraviolet Imaging with Low Cost Smartphone Sensors: Development and Application of a Raspberry Pi-Based UV Camera Thomas C. Wilkes , Andrew J. S. McGonigle , Tom D. Pering , Angus J. Taggart ,Benjamin S. White, Robert G. Bryant and Jon R. Willmott doi.org/10.3390/s16101649 mdpi.com/1424-8220/16/10/1649/htm
Excimer laser photoresist stripping Menachem Genut, Ofer Tehar-Zahav, Eli Iskevitch, Boris Livshits Proceedings Volume 2724, Advances in Resist Technology and Processing XIII; (1996) doi.org/10.1117/12.241858
Check out my other videos: youtube.com/leslaboratory Please don't forget to like,subscribe and comment for more great content!
If you found this content useful, and would like to support this Channel, please consider donating: paypal.me/leslaboratory
Music in this video: 8-Bit March by Twin Musicom is licensed under a Creative Commons Attribution 4.0 license. creativecommons.org/licenses/by/4.0
#Laser #BayerFilter #RaspberryPi #electronics #opticsMost powerful diode Laser OVERDRIVEN! Nanosecond Laser!Les Lab2024-09-20 | JLCPCB PCB Fab & Assembly from $2! Sign up to Get $60 Coupons: jlcpcb.com/?from=leslaboratory
JLCPCB Engineers Day deals to get up to $125 in coupons and a chance to win a $150 Amazon gift card : jlcpcb.com/engineers-day?from=ACT
Episode 65
#laser #nanosecond #pulsedlaser #jimwilliams
Let's drive the worlds most powerful visible laser diodes FAR beyond its original specifications! Running at hundreds of volts and over 80 amps, with a home-made Avalanche Nanosecond Pulsed Laser Diode Driver!
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0:00 Intro 0:24 The most powerful Visible Laser diode in the world! 0:54 Pulsed Laser diodes 1:17 Sensitive Laser diodes 1:40 Scientific Literature on Pulsed visible Laser diodes! 4:33 Extraordinary peak powers. 6:12 Application note 47 the Jim Williams avalanche driver 6:50 Manhattan Style board 7:00 A real design in EasyEDA 9:30 JLCPCB $2 PCB's Video Sponsor 10:42 Assembled prototype Drivers 11:28 High Voltage power supply 11:55 Laser Safety 12:04 Powering up the Laser 12:35 Nanosecond pulses! 13:13 Power Measurement 14:47 Calculation 15:18 Building a Laser Rangefinder! 17:00 Fluorescent Dyes 17:46 Future work 18:11 Credits!INSIDE A LASER! An Open Cavity Helium-Neon Laser!Les Lab2024-07-01 | Episode 64
#laser #electronicscreators
Let's take a look at an awesome open resonator cavity He-Ne Laser! Tweak-able and hackable, you could fit your entire body inside the Laser cavity!
I talk about the Brewster angle, and the technical specs of a NOS Brewster windowed Helium Neon Laser tube!
Optical contacting is discussed, that is used to bond glass parts with no glue, but creates a permanent bond.
I designed built a really cool mirror mount that can hold 6 Laser mirrors!
I show how to do Quick and Easy Laser alignment, and demonstrate Transverse Electromagnetic Modes (TEM), as well as extend the cavity to around two feet!
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0:00 Intro 0:08 Laser tubes 1:04 Brewster Windows 1:38 Brewster Laser Tube 3:02 Optical Contacting 3:28 Mirrors 4:11 Tube mounting 5:02 Mirrors 5:33 An AWESOME mirror mount! 7:37 Tube lit 7:57 QUICK and EASY Laser Alignment 9:25 First Light! 9:55 Rotating the Mirrors! 10:39 The output beam, beautiful modes! 12:30 Half metre cavity! 13:00 Smoke test 13:19 OutWhat happens when you reflect a Laser beam back on itself?Les Lab2024-04-20 | Episode 63
#laser #electronicscreators
What happens when you reflect a Laser beam back on itself? This unusual Laser system from a Particle Counter does exactly that! Why? how does it work? Let's find out!
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I bought a Vintage Laser Particle Counter from eBay for a tear down. This contains all sorts of juicy stuff, including a vintage Z80 computer system, and a Laser! This contains a very special Helium Neon Laser, that will be the topic of a follow up video, so don't forget to Subscribe!
Link to Die Pictures Teledyne Philbrick TP1321 https://www-richis--lab-de.translate.goog/Opamp80.htm?_x_tr_sl=de&_x_tr_tl=en&_x_tr_hl=en&_x_tr_pto=wapp
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0:00 Intro 0:08 Laser Particle Counter Overview 0:44 Front Panel 1:55 Air inlet 2:08 Back Panel, Particle Measuring Systems Inc 2:51 Powering up 1987 vintage gear! 3:44 Cover off. Electronics Goldmine! 4:45 Laser tube on! 5:00 Acquisition board, ADC's PIO's 5:42 CPU board, Z80 CPU, CTC, SIO EPROM's, RAM 6:21 Amplifier board 7:20 Air Management, Pumps, Filters, Valves 8:12 Printer Control Board 9:08 Misc parts, Printer, Switches, LCD, BNC 9:36 The Laser! Helium-Neon 10:37 The Laser Cavity! Beautiful Laser Beams! 11:00 Optics 11:38 Exposed Laser Beam,cavity components, more beautiful beam shots! 12:28 Super Bright Laser beams!DANGEROUS Laser Power Supply Teardown!Les Lab2024-03-17 | Episode 61
#laser #electronicscreators
I bought a Tattoo Laser power supply from eBay and this thing is, well, terrifying. I have never seen a commercial piece of equipment built as poorly as this! This seems to be built with the added feature that it can also remove the operator. Permanently.
Still, lets tear it down, attempt a repair, and power the thing on!
0:00 Intro 0:16 Tattoo Laser Power Supply 1:50 Inside the case, SMPS, faults, and high voltage power supply 6:25 Switched Mode power Supply Board faults 7:16 SMPS parts stripped 8:00 New MOSFET, Resistors and SCR and repair 8:31 Schematic of the Switched Mode Power Supply 10:25 Power on smoke test 11:29 Re-assembled power on 12:29 Laser setup 13:48 Full test 15:30 An interesting failure mode 17:19 Discussion of failure mode and Options 19:22 TL431 shut regulator as an option 20:05 OutShaking molecules until Laser Light comes out. DIY Raman Laser!Les Lab2023-12-09 | Episode 60
#Raman #Laser
In this episode, let's build a Raman Laser! First I talk about some of the background of light scattering, Rayleigh Scattering, Raman Scattering discovered by C.V Raman, then the discovery of the Raman Laser by Gisela Eckhardt. I cover the physical setup from an engineering standpoint. An old Nd:YAG Tattoo Laser I refurbished is used to pump a cuvette filled with a Raman Liquid. Although in the early experiments the megawatt Laser energy destroyed the cuvette I was using, I built a Raman cell from scratch, with replaceable windows.
Do I manage to shift 532nm green light to 629nm Red?
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0:00 Intro 0:15 Light Scattering 0:47 Rayleigh Scattering 1:22 Raman Scattering 2:26 Stimulated Raman Scattering SRS 3:14 Raman Laser development 4:19 Commercial Raman Lasers 5:14 Raman Laser Explanation 6:39 Intitial Experiment; Laser ate itself! 7:16 Raman Laser build 7:48 Raman Laser setup 9:41 First Light! 10:44 Measuring the wavelength 11:39 Conclusions and future workLittle Junk Laser is a MEGAWATT Beast!Les Lab2023-10-09 | Episode 59
#photonics #Laser
In this episode, a sub $30 dollar junk tattoo laser is torn right down, repaired and re-assembled into a bench-top instrument. During the repair, theory is covered, as well as some practical alignment techniques. A home made, high voltage power supply is constructed for it, generating 100 Joules for the flash-lamp. The final Solid State Q-switched nanosecond Neodymium:YAG Laser has megawatt level peak powers, capable of vaporising materials, generating plasma in the air, and frequency doubling to green. Power measurement is done using a Joule Meter, a fast picosecond risetime photodiode, and an oscilloscope, with some very surprising results!
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0:00 Intro 0:43 Overview of the Laser 3:24 Diagram and explanation the Laser 5:11 Tear-down of the Cavity 5:22 Extracting the Xenon Flash Lamp and Laser Rod 5:52 Examining the Neodymium rod and Xenon Flash Lamp 6:40 Corrosion and gunk 8:07 All cleaned 9:02 Replacing the mirror mount 9:38 Mounting Base 10:20 Finished assembly 10:31 How to Align a Laser 11:15 Safety First! 11:43 Home made High voltage Power Supply 13:57 Laser connected 14:24 First Light and final alignment! 15:54 Q-Switching! 16:21 Laser induced breakdown 16:30 Frequency doubling! 16:43 Measuring the Laser Power 17:24 Analysis of the Laser output pulse 19:34 Pockels Cell 19:42 Future experiments 20:06 CreditsControlling Light with High Voltage and Aniseed! The Kerr Effect!Les Lab2023-09-03 | Episode 58
#photonics #electro-optics #Kerr-effect
In this episode, let's control light with High Voltage and Aniseed using the Kerr Effect! Ordinarily, Kerr cells use a particularly nasty and deadly Liquid as the Kerr media. In this episode I investigate a possible safe alternative using Aniseed!
After a little dive in to history including mechanical television and filming nuclear bomb detonations, we take a look at some kerr fluids, and dig up a reference to little known chemical derived from Aniseed! This chemical is responsible for the Ouzo effect in certain beverages, but also has a high AC Kerr constant! I build a nice Kerr cell from commonly available materials, cuvettes, polarizers, and scrap metal, as well as a nice high voltage porcelain insulator and demonstrate this effect.
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0:00 Intro 0:11 Faraday Effect 0:17 Kerr Effect 1:37 Nitrobenzene 3:24 List of AC Kerr Constants 3:50 Aniseed! 4:48 Kerr cells 5:14 The Build 5:52 High Voltage Power Supply 9:05 The Experiment 10:56 SummaryThermal camera VS Carbon Dioxide Laser!Les Lab2023-08-11 | Episode 57
#thermalcamera #FLIR #carbondioxidelaser
In this episode I explore a CO2 laser with a thermal camera, and manage to break it! It looks like there is potential for some really awesome experiments with it though!
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0:00 Intro 0:08 Background 0:57 Electromagnetic Spectrum 1:16 Carbon Dioxide Lasers 1:41 Experimental setup 2:13 Synrad controller (Home Made!) 2:48 CO2 Laser demo: Fire! 3:26 Focused beam! 3:58 Seeing an invisible beam of heat! 4:51 Diffraction 5:55 I damaged the thermal camera! 6:38 Warning about thermal cameras! 6:51 Potential experiments! 7:16 CreditsThermal camera on the Raspberry Pi! Topdon TC001 Product review!Les Lab2023-07-08 | Episode 56
#thermalcamera #FLIR #raspberrypi
In this episode I review the TOPDON TC001 Thermal Camera. It can perform temperature readings accurate within 3.6℉ (2℃) or 2% of the object’s actual temperature, and display a clear thermal image with an ultra-high infrared resolution of 256x192 pixels. This works with Android devices and Windows, but even better, I wrote software so it can run on Linux and the Raspberry Pi!
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0:00 Intro 0:15 Unboxing 2:16 Running the Thermal camera on Android 5:59 Windows software review 7:44 Linux/Raspberry Pi Software Repository and Features! 10:52 Raspberry Pi Demo! 13:13 Final thoughts 13:33 OutroGrowing Laser Crystals used in NUCLEAR FUSION!Les Lab2023-06-30 | Episode 55
#optics #laser #nonlinearoptics #photonics
In this episode, let’s look at growing non-linear crystals that can convert Laser Light into different colours, using a process called second harmonic generation. The crystals we will be looking at are the same crystals used in the National Ignition Facility, a Laser driven Nuclear Fusion experiment!
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In this episode, let’s look at growing non-linear crystals that can convert Laser Light into different colours, using a process called second harmonic generation. The crystals we will be looking at are the same crystals used in the National Ignition Facility, a Laser driven Nuclear Fusion experiment!
Although non-linear crystals can be prohibitively expensive to manufacture, considerable research has been conducted into growing them at large scale and inexpensively, especially for large systems. One such system, is the national ignition facility. This is a laser-based inertial confinement fusion research device, located at Lawrence Livermore National Laboratory in the United States. It is the largest and most complex Laser system in existence, with over 7,500 meter-sized optics, and 26,000 smaller ones. The facility itself takes up the space of 3 football fields and can deliver up to 2 Million Joules of ultraviolet light and 500 terawatts of peak power into a fusion target the size of a pencil eraser called a Hohlraum. This generates the extreme pressures and temperatures necessary to achieve nuclear fusion. It achieved the first instance of scientific breakeven controlled fusion in an experiment on December 5, 2022, with an energy gain factor of 1.5 (Note, this does not factor in actual power consumption of the facility, an important omission by the popular press! Nonetheless a huge achievement!
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0:00 Intro 0:18 Second Harmonic Generation 0:43 Discovery of SHG 1:17 Expensive Exotic Materials 1:37 Research and the National Ignition facility 3:15 Potassium Di-Hydrogen Phosphate (KDP) 4:03 Growing KDP at home! 6:07 YAG Laser setup 6:57 Generating Green light from Infrared 8:21 Thanks to channel Supporters.WEIRD Fluorescence Two-Photon absorption!Les Lab2023-06-02 | Episode 54
#optics #laser #nonlinearoptics
Lets take a look at Two-photon absorption
In this episode, let's look at a really unusual Fluorescence phenomenon, two photon absorption! This phenomenon is used in two photon microscopy for imaging cells buried deep in living tissue, and could be used in volumetric 3D displays and ultra dense data storage!
This was originally predicted by Maria Goeppert-Mayer in 1931 in her doctoral dissertation. Thirty years later, the invention of the laser permitted the first experimental verification of TPA. Maria went on to become the second woman to win a Nobel Prize in physics for proposing the nuclear shell model of the atomic nucleus.
The unit for the two-photon absorption cross section is named the Goeppert Mayer (GM) unit after her.
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0:00 Intro 0:18 Fluorescence 1:06 Maria Goeppert Mayer Two-photon absorption 1:42 Two-photon absorption explanation, Jablonski diagrams 2:43 Suitable Fluorescent Dyes 2:48 Rhodamine 6G 3:18 Single photon fluorescence 4:45 15kW IR Laser! 5.45 Extreme power density 6:00 Two Photon fluorescence! 6:58 Sneak peak and credits!Second Harmonic Generation in a 15 Kilowatt Laser!Les Lab2023-04-29 | Episode 53
#optics #laser #nonlinearoptics
Let's measure the Twotrees 1064nm Laser Head, and investigate non-linear second harmonic generation, converting this IR Laser to Green!
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In this video I explain how the TwoTrees 1064nm Infrared Laser works. This is a Diode Pumped Q-Switched Laser Nd YAG Laser, with a claimed peak output power of 15 Kilowatts! Internally a Neodymium YAG rod is pumped by an 808nm Laser diode, and this a q-switched by means of a Cr:YAG saturable absorber, resulting in a nanosecond Laser with high peak powers. I measure the output with a Gentec Pyroelectric sensor and a Fast photodiode from Thorlabs. In the second half o the video I explain Second Harmonic Generation (SHG) works. This is the process that is used in a green Laser pointer, and demonstrate this with a Potassium Titanyl Phosphate (KTP) nonlinear crystal generating a 532nm Green Laser Light! Of course everyone loves an obligatory Laser beam shot!
0:00 Intro 0:13 Laser description 0:58 How a Diode pumped Q-Switched Solid State Laser works! 2:47 Measurement setup 5:21 Measuring Pulse Width 7:19 Measuring Pulse Energy 7:46 Calculator 8:42 Collimating the beam 9:48 How Green DPSS Lasers Work 11:38 Second harmonic Generation Demonstration 12:04 Beautiful Green Beams! 13:48 Outro and CreditsLaser Engraver review TwoTrees TS2 20W and 1064nm Laser HeadLes Lab2023-03-21 | Episode 52
A Product review of the Twotrees TS2 Laser engraver! This has a huge bed size, z-axis control, and a massive 20W Laser head!
More interestingly, Laser manufacturers have been offering 1064nm Laser heads as well, that can engrave all metals! (but I have other plans for it :-) so subscribe!)
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I was asked to do a review of the Andonstar AD249S-M Digital Microscope. Lately I have been needing glasses for close up work, so why not?! Several use cases are tested, including a nice shot of some alluvial Scottish Gold!
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0:00 Intro 1:12 Unboxing 3:12 USB Adaptors 4:04 First look 4:44 SMD devices under the microscope ESP32 5:22 Miniature optical components 5:10 EPROMS under the microscope 8:05 Microscope slides 9:03 Alluvial Gold! 9:54 External HDMI 10:33 Summary and critical review 12:01 OutroHacking a Tektronix Oscilloscope to1GHz!Les Lab2023-02-26 | Episode 50
#tektronix #1ghz #hack
Lately I have run out of bandwidth, trying to measure signals from pulsed Lasers. My fastest oscilloscope was a hacked DS1054z at 100MHz, nowhere near fast enough to measure nanosecond pulses.
I picked up a Tektronix TDS754C from eBay. This scope has a beautiful CRT display, and is already a decent scope, but bought it with the sole purpose of hacking it to 1GHz, and whilst I am at it, increasing the memory ;-)
These hacks are pretty straightforward and effectively turn a TDS754C into a TDS784C, though there is a trap with rise-time measurement...
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1GHz upgrade hack presented here based on information from the EEVBlog:
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0:00 Intro 0:12 Overview 3:20 Risetime measurement with Aliexpress fast pulse generator 4:57 Processor board 6:33 Acquisition board 8:09 1GHz Hack 8:40 Risetime measurement FAIL! 9:59 Risetime measurement PASS! 11:48 Extending record length hack 15:47 Reboot! 17:53 Summary 18:50 Outro 18:58 Credits!Supercontinuum in Multimode FiberLes Lab2023-01-28 | Episode 49
#supercontinnum #whitelightlaser #laser This episode is a follow up video on a home made Supercontinuum Laser! This version uses Multimode Telecoms fiber, for much better efficiency, however this stuff also exhibits additional properties, including very bright combs, and what looks like self-mode cleaning...
For a very good explanation of Stimulated Raman Scattering (the primary nonlinear process in this video) please check out: Your Favourite TA's video on Stimulated Raman Scattering here: youtube.com/watch?v=sZEGMDZKyPQ
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Supercontinuum Academic paper: Lin, Chinlon; Stolen, R. H. (1976-02-15). "New nanosecond continuum for excited‐state spectroscopy". Applied Physics Letters. AIP Publishing. 28 (4): 216–218. doi:10.1063/1.88702. ISSN 0003-6951.
0:00 Intro 0:46 Multimode Fiber 2:25 Measuring pulsed Lasers 3:55 Dye Laser Joule meter measurement 4:37 Dye Laser Pulse Width measurement 5:27 Calculations 7:27 Supercontinuum generation multimode fiber 10:46 View of the Spectrum, bright combs! 14:00 Measuring Supercontinuum power and efficiency 14:40 Spectrometer measurement 15:15 100m of mutimode fiber! 16:15 Brilliant full spectrum combs! 17:23 Close up of fiber 18:01 More gratuitous beam shots! 18:37 Long exposure photos! 19:07 OutroSupercontinnum in Multimode Fiber TeaserLes Lab2023-01-12 | Episode 48
This is a short teaser trailer of where this project goes next! Tempted to call it: Supercontinuum, bigger brighter and uncut!
Multimode Fiber (50/125) can generate extremely bright continuum, because of excellent coupling efficiency. Nonlinear effects abound here, and the fiber even exhibits mode cleaning! This is bright enough to film in daylight, and so obligatory smoke shots abound!
I am planning on making this more in-depth than the last, so comment below how long it should be: 10 minutes 15 minutes 25 minutes
Also, is there an appetite for short videos at all (Odd bits that I might not consider doing a full video on, 2 minute teardowns, that kind of stuff)?
Please Subscribe and Share on social media!
If you found this content useful, and would like to support this Channel, please consider supporting this work on Patreon: patreon.com/leslaboratory Or donate directly: paypal.me/leslaboratory Alternatively, please share this content on your social media platforms, it really helps me out!DIY SUPERCONTINUUM LASER on a BUDGET!!Les Lab2022-12-29 | Episode 47
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The Ultimate White Light Laser! DIY Supercontinuum Laser.
In this episode I discuss Supercontinuum Lasers, the ultimate white light Laser! Normally such lasers cost thousands of dollars and use photonic crystal fiber, but later on, I show how to construct one from a practical standpoint, on a super tight budget using plain old telecoms fiber!
Supercontinuum Academic paper: Lin, Chinlon; Stolen, R. H. (1976-02-15). "New nanosecond continuum for excited‐state spectroscopy". Applied Physics Letters. AIP Publishing. 28 (4): 216–218. doi:10.1063/1.88702. ISSN 0003-6951.
0:00 Intro 0:12 Introduction to Supercontinuum 1:37 Supercontinuum kits 3:01 Review of an academic paper 6:17 Overview of a home made supercontinuum laser 8:13 Dye Laser 9:14 Supercontinuum generation 10:27 Dispersing the Supercontinuum with a prism! 11:37 OutroCoupling Laser beams into Fiber Optic Cable!Les Lab2022-12-03 | Episode 46
#fiberoptics #fibercoupling #laser
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In this video I demonstrate how to couple Lasers into Fiber Optic cable quickly and easily using a fiber visual fault locator, some mirrors and some DIY fiber collimators. I also couple light into Multimode and Singlemode fiber, and demonstrate what happens when you exceed a fiber's bend-radius. Fiber optics is far more interesting than just telecoms, there a variety of unusual applications including high voltage sensing , temperature measurement and more!
I have a couple of way interesting projects in the pipeline exploring cool stff with fiber optics, so subscribe!
0:00 Intro 0:08 Fiber optic cables 2:06 Fiber Colimator 3:14 Coupling Light DIY Fiber couplers and Collimators 5:54 Visual Fault Locator 7:51 Coupling a Laser into a Fiber Optic 11:55 Coupling into single mode cable 13:00 Fiber Bend Radius 13:46 Outro and creditsDIY Raspberry Pi Spectrometer NEW SOFTWARE!Les Lab2022-10-22 | Episode 45
#spectroscope #spectrometer #raspberrypi
Code at the end of the Description! Check out my other videos: youtube.com/leslaboratory Please don't forget to like,subscribe and comment for more great content!
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In this video I demonstrate the latest and greatest software for the home-made Raspberry Pi Spectrometer with al new features! If you already have a Raspberry Pi, this useful tool can be built for under 100 bucks!
The new software features:
Accuracy has been significantly improved by implementing multi-wavelength calibration and a Polynomial regression data fit to compute wavelengths as precisely as possible across the measured range.
Full screen spectrometer display! On Raspberry Pi systems, the interface is designed to fit 800 x 480 screens, which seem to be a common resolution for RPi LCD's, paving the way for the creation of a stand alone benchtop instrument. (for example the HyperPixel 4.0, etc)
Waterfall display from measuring spectra changes over time
This uses readily available components and easy to use Python software I have written specially for this application.
0:00 Intro 0:16 Hardware 1:41 Software Repo Github 2:33 New Features! 6:20 Where to buy parts 7:45 Quick test 9:30 New Software Demo! 9:49 Calibration 14:38 Waterfall mode 15:36 Test with a Dye Laser! 18:19 Self contained unit with screen! 19:16 Outro 19:26 Channel supporter creditsCO2 Laser Upgrades! Part 2Les Lab2022-09-18 | Episode 44
This video is a followup detailing the repair and refurbishment of a Chinese K40 style 50W CO2 Laser cutter I picked up for just 60 bucks! In this video I show 3 must have upgrades for a Chinese CO2 Laser cutter, a new cutting head with air assist, a current meter, and a review of the Minigerbil 3 from Awesome.tech and its use with LightBurn software
Buy the Mini Gerbil V3 from: https://awesome.tech/product/mg3-mini-gerbil-v3-2-axis-controller-for-k40-laser/
The milliameter is any suitable 0-30mA analog meter. Check your tube specifications for maximum allowable current.
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0:00 Intro 0:22 Refurbishment 0:40 Air assist cutting head Upgrade 1:30 Old controller (Leetro) 2:14 Milliammeter Upgrade 3:10 Internals gutted 4:10 Mini Gerbil v3 controller board 7:43 Blinkenlights 8:17 LightBurn software 8:47 Engraving and cutting job 10:12 Complex cutting job 12:55 Summary 13:16 Outro 13:25 Channel Supporter CreditsRepairing a K50 CO2 Laser Cutter. Part 1Les Lab2022-08-14 | Episode 43
This video is the first in a short series detailing the repair and refurbishment of a Chinese K40 style 50W CO2 Laser cutter I picked up for just 60 bucks! Is it going to be worth it? What should I replace the controller with? A Mini Gerbil or a Cohesion3d? Should I convert the old tube to a flowing gas CO2 Laser? Comment down below!
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0:00 Intro 0:10 Overview 0:30 Broken CO2 Laser tube 1:46 Overview of the CO2 Laser Cutting machine 2:24 Electronics (PSU & Controllers) 4:03 Laser bed 5:49 Laser controller 6:18 first light 6:42 Test wood engraving 7:08 Beam profiling the Laser 8:45 50W CO2 Laser tube overview! 10:08 Summary 10:51 Outro 11:00 Credits! Thanks to all who have supported this Channel!xTool D1 Pro Review and first projectLes Lab2022-08-03 | Episode 42 #laserengraving #lasercuttingmachine
In this episode I review the xTool D1 Pro and demonstrate how to do your first mini project! I don't often do reviews, but my inbox was filling up with companies asking me to review these, so I had something of a choice. Was it a good one? Watch to find out!
I personally am interested in engraving panels for my electronics projects.If there is interest in future engraving projects, please leave a comment below!
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0:00 Intro 0:21 Unboxing 5:46 10 Watt Laser 7:44 Software: xTool Creative Space 8:40 A simple first project! 12:09 Cutting and Engraving Wood! 14:43 Engraving slate 15:36 Summary 16:05 OutroCO2 Laser Engraver. Industrial Laser Coder Hacked! Part 2!Les Lab2022-07-13 | Episode 41
$2 for 1-4 layer PCBs ;PCB assembly from $0 : jlcpcb.com/DYE
#linuxcnc #laserengraving #GCode
In this video I have rebuilt a Domino D100+ Industrial Laser Coder/ marking head, and demonstrate some code to get it to do some engraving! This Laser uses the XY2-100 Protocol to drive the Galvos and modulate the Laser, so software and hardware is needed to get this to work. This Uses the awesome OpenGalvo OPAL library written by Daniel Olsson, and a PCB designed by me, to send standard Gcode which is then translated into XY2-100. This combination is suitable for driving other Galvo Scan heads such as the Sino-Galvo SG7110. F-engrave from the Linux CNC project is demonstrated to turn an image in to suitable G-Code for the machine. I engrave a few types of materials with it including Wood, Perspex and glass!
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0:00 Intro 0:09 Galvo XY2-100 Pinout (Sino Galvo) 0:38 XY2-100 Protocol 1:26 OpenGalvo OPAL Project 4:54 Schematic and PCB Design 6:44 Finished PCB 7:33 Rebuilt CO2 Laser coder 7:57 Engraver setup 8:26 First light 8:53 Convert image to G-Code (F-Engrave) 10:33 Wood engraving 10:58 Perspex engraving 11:51 Glass engraving 12:32 Will it Crash & Burn?? 13:41 Results 14:25 Out!Industrial CO2 Laser Coder TEARDOWN and repair! Part 1!Les Lab2022-06-10 | Episode 40
#laser #laserengraving #electronics
In this video I tear down a Domino D100+ Industrial Laser Coder! It has a high speed Galvo Scan head complete with all the amplifiers the drivers and Silicon mirrors, and beautiful Zinc Selenide (ZnSe) F-Theta lens. There is also a II-VI ZnSe Collimating lens and of course a 15W Synrad Carbon Dioxide Laser, with an unusual wavelength of 9.3 microns!
Is it all scrap, or can it be brought to life? Watch till the end to find out!
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0:00 Intro 0:08 Domino 100+ Laser Marking head Overview 0:59 Harting Industrial Connector 1:36 Laser Scan Head 2:39 ZnSe F-Theta Lens & Galvo's 4:06 Galvo Driver / Amplifier Boards 4:46 Laser Head Teardown Synrad CO2 Laser & Collimating Lens 11:02 Synrad CO2 Laser teardown 14:00 Helium Soak and Laser repair and mystery fault 19:00 Laser scan head hacking XY2-100 21:02 Summary of parts recovered and Collimating LensHigh Power Laser Diode Power Supply 10W and Laser SafetyLes Lab2022-05-11 | Episode 39
#laser #electronics
$2 for 1-4 layer PCBs ;PCB assembly from $0 : jlcpcb.com/DYE
I this episode I demonstrate a home made 10W Laser Diode Driver. As this is a Class 4 Laser, there is discussion on how to design, build and run such a Laser safely! Of course there is the inevitable burning and Smoke test, so watch until the end!
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0:00 Intro 0:38 Laser diode Catalog 1:15 Laser Diode Overview 2:03 Laser Diode Datasheet 2:59 Laser Diode Driver Schematic 4:13 PCB Layout 4:43 3D Model 5:25 Power supply overview 8:02 British Standards Safety of Laser Products 9:33 Laser Safety Glasses 12:50 Laser Demonstration and Smoke test
#burninglaser #lasersafetyHow to make a Triggered Spark Gap for High Voltage Lasers and Marx GeneratorsLes Lab2022-03-12 | Episode 38
#highvoltage #laser
As "dougc314" and "what else is on" noted, at 10:40 there is an error in my Schematic! This should be a 2N3906 not a 2N3904.
The RC differentiator (11:15, thanks "GermanMythbuster" for pointing that out!) is missing values on the Schematic The cap should be 22nf, and the resistor is 4k7.
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In this video, a home-made Triggered Spark Gap is demonstrated, along with the power supply schematics. This was designed primarily for my nitrogen laser, but can be used in Marx Generators, Tesla coils, or anywhere you need high voltage triggered switch! Original Nitrogen Laser video: youtu.be/pCnXftuJ9Zo Nitrogen Laser teardown: youtu.be/AyN1o_3XaTw Laser capacitors: youtu.be/8wUxYVe98Uo
#triggeredsparkgap #highvoltage #LaserHome Made Integrating or Ulbricht SphereLes Lab2022-02-05 | Episode 37
#laser #optics
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In this video, a home-made Ulbricht or integrating sphere is explained and demonstrated!
Papers Cited: A Mixture of Barium Sulfate and White Paint is a Low-Cost Substitute Reflectance Standard for Spectralon https://digitalcommons.usu.edu/cgi/viewcontent.cgi?article=1010&context=cpl_techniquesinstruments
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Check out my other videos: youtube.com/leslaboratory Please don't forget to like,share,subscribe and comment for more great content!
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Dumpster Nitrogen Laser Part 2 It Lives!
I bought a couple of MNL-100 Nitrogen lasers that were listed as "Pulled form a working environment" but we ll know that means "Pulled from a Dumpster"! These are of course non working, and in very poor physical condition.
This is the followup video on the rebuild. I describe the new controller, overclock the Laser, and drive some Dye Lasers with it!
#Laser #OverclockedLaser #NitrogenLaser #DyeLaser #opticsRaspberry Pi Zero 2 W Spectrometer!Les Lab2021-10-31 | Episode 34 #raspberrypi A short video on the newly released Pi Zero 2 W! Will it run my PySpectrometer software?
For a good breakdown of the capabilities of the new Pi Zero W, see "Explaining Computers" video here: youtube.com/watch?v=Qxcyb5z2HDM
Code at the end of the Description! Check out my other videos: youtube.com/leslaboratory Please don't forget to like,subscribe and comment for more great content!
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This is a follow up video to Episode #20 where I built an inexpensive Raspberry Pi Spectrometer: youtu.be/T_goVwwxKE4
Check out my other videos: youtube.com/leslaboratory If you found this content useful, and would like to support this Channel, please consider supporting this work on Patreon: patreon.com/leslaboratory Or donate directly: paypal.me/leslaboratory Alternatively, please share this content on your social media platforms, it really helps me out!Can it be repaired? Dumpster Nitrogen Laser teardown Part 1Les Lab2021-10-02 | Episode 32 #laser #electronicscreators #optics
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I bought a couple of MNL-100 Nitrogen lasers that were listed as "Pulled form a working environment" but we ll know that means "Pulled from a Dumpster"! These are of course non working, and in very poor physical condition, so I do a very in depth tear down on one, right down to the guts. Later I rebuild it, and hack on a good old fashioned Spark Gap switch to see if I can get some output.
This will be a two part video. Later I will build my own control electronics, and graft in a triggered spark gap. Stay Tuned!
***Video Contents*** 00:00 - Intro 00:18 - Nitrogen Laser overview 00:52 - Teardown 01:57 - Control Board description 05:54 - High Voltage Power Supply 07:30 - Pre-Ionizer board 08:45 - High Voltage IGBT switch 13:39 - Laser Energy Sensor 16:53 - Laser Tube 23:33 - Preionizer powerd up 24:28 - Oscilloscope Measurement 26:14 - High voltage power supply hacked 29:01 - Replacing the IGBT switch with a spark gap 31:13 - First Light! Powering up the Laser! 32:00 - Measurement of RF Noise 32:35 - Further improvements for the Laser. Commercial spark gaps and control electronics. 33:20 - Outro
#Laser #Teardown #SparkGap #Dumpsterhack #electreonics #opticsHomemade Acousto-optic controller for Under $100!Les Lab2021-09-06 | Episode 31
In this episode I take a look at an Acousto-optic Tunable Filter! This device allows us to modulate or pick a wavelength from a multiline Laser using very high frequency sound waves, that are coupled into a crystal using a Piezoelecric transducer.
Since this did not come with a controller, I show you how to build a controller for these devices for under 100 bucks, using an inexpensive Voltage controlled Oscillator (VCO) and an RF Amplifier!
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#Laser #acoustooptics #opticsYellow DPSS Laser with Analog Modulation for under $100!! Unboxing, Review & Measurement.Les Lab2021-07-15 | Episode 29 #laser In this episode I unbox and review another sub $100 Yellow Laser, this time from Australia! Claimed specs are: 560nm (Yellow-Green) @ 15-20mW Analog Modulation!
I put it through it's paces, testing with the Raspberry Pi 4 Spectrometer, measure with a Coherent LaserCheck, and try out the modulation feature.
These modules can be purchased from: LaserLandAustralia https://laserland.com.au/ info@laserlandaustralia.com +61 421 165 215
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#YellowLaser #Laser #opticsSupermarket Barcode Scanner Teardown and hack!Les Lab2021-07-03 | Episode 28 #laser In this episode, I tear down a supermarket checkout onmidirectional barcode scanner, talk about the optics and electronics, and discover an easter egg! Later in the video, I hack in a DPSS Laser, rebuild it and power it up, so keep watching until the end to see the barcode scanner from hell!
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#LaserHow to build a MINIATURE Spectrometer for the Raspberry PiLes Lab2021-06-20 | Episode 27 #spectrometer #raspberrypi
Code at the end of the Description! Check out my other videos: youtube.com/leslaboratory Please don't forget to like,subscribe and comment for more great content!
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This is a follow up video to Episode #20 where I built an inexpensive Raspberry Pi Spectrometer: youtu.be/T_goVwwxKE4
In answer to comments about miniaturizing this, I build a tiny lightweight Spectrometer, suitable for adding into smaller projects such as Tricorder projects, or maybe even mounting on a Drone. As an aside, I also look at the spectra from some Different lamps (as well as Ultraviolet) , including: Fluorescent, Mercury vapor,, Xenon, and Deuterium!
#RaspberryPi #SpectrometerLaser Barcode Scanner Teardown How to hack it into Laser Light Show!Les Lab2021-06-15 | Episode 26 #laser Check out my other videos: youtube.com/leslaboratory Please don't forget to like, subscribe and comment for more great content!
In this video, I tear down a Metrologic Laser Barcode scanner that you might see used in supermarkets and warehouses. I talk about some of the components on the circuit board. I extract the scanner mirror and shine a 50mW 532nm Laser at it through smoke in a can, to give a simple, but really cool Liquid smoke effect, that looks awesome! Everybody loves Laser beams!
If you found this content useful, and would like to support this Channel, please consider supporting this work on Patreon: patreon.com/leslaboratory Or donate directly: paypal.me/leslaboratory Alternatively, please share this content on your social media platforms, it really helps me out!He-Ne Lasers! Green Laser, Yellow Laser, Red Laser & Dual Wavelength He-Ne Laser!Les Lab2021-06-07 | Episode 25 Check out my other videos: youtube.com/leslaboratory Please don't forget to like,subscribe and comment for more great content!
In this video, I demonstrate colored Helium-Neon Lasers! The first 3 are manufactured by Lasos, with the following specs: A red Laser 632.8nm 11mW A Yellow/Amber Laser 594nm 2.2mW A Green Laser 543nm 1.16mW
Later on, I force a vintage green Helium Neon Laser to generate 2 wavelengths simultaneously!
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#laser #opticsRaspberry Pi Pico display fonts in MicroPython How to design fonts for your pi pico projectLes Lab2021-05-30 | Episode 24
#raspberrypi #raspberryPiPico #Python
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In this video, how to create fonts in Python for the Raspberry Pi Pico Display from Pimoroni: shop.pimoroni.com/products/pico-display-pack This little display is way cool, but the font built into the firmware is not the best.
This is an easy to use Python implementation of a 5x7 ASCII font and associated helper functions and includes a section on how to make custom fonts with a tool.(This is useful if you want to design your own fonts, just click the cells to toggle the pixels, and it spits out binary and hex data :-) Check it out!)
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#laser #optics #electronics
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In this episode I unbox and review a Yellow Laser from China! Alleged specs are: 574nm (Yellow) @ 8mW Thanks to Mathias for the tip!
I put it through it's paces, testing with the Raspberry Pi 4 Spectrometer, and measure with a Coherent LaserCheck
Is it for real, or is it Junk? Watch to the end and find out!
lasence.en.alibaba.comHow to measure Dye Laser Tuning curves with a DIY Raspberry Pi Spectrometer.Les Lab2021-05-16 | Episode 22
#laser #spectrometer
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In this video I demonstrate how to measure the tuning curves of a Home Made Dye Laser with my DIY Raspberry Pi Spectrometer! I Use 4 Dyes: Coumarin-1, Sodium Fluorescein, Rhodamine 6G.
Code at the end of the Description! Check out my other videos: youtube.com/leslaboratory Please don't forget to like,subscribe and comment for more great content!
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Following on from the previous video, and the comments, Version 3 is now released. It has Peak hold added for pulsed applications, and can now export CSV data
All code for this video and the bill of materials, as well as additional information is available at my GitHub:
Code at the end of the Description! Check out my other videos: youtube.com/leslaboratory Please don't forget to like,subscribe and comment for more great content!
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In this video I demonstrate a home-made Raspberry Pi Spectrometer for measuring the wavelength of light! If you already have a Raspberry Pi, this useful tool can be built for under 100 bucks! This uses readily available components and easy to use Python software I have written specially for this application.
All code for this video and the bill of materials, as well as additional information is available at my GitHub:
CODE at the end of the Description! Check out my other videos: youtube.com/leslaboratory Please don't forget to like and subscribe and comment for more great content!
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Time for some Science! In this video, I measure the power output of my home made Nitrogen Lasers using Gentec Pyroelectric Energy Sensors! Spoiler alert, I debut my largest home made TEA Nitrogen in this episode as well. What is its peak power? Watch the video to find out!
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This is a quick follow up video to "Inexpensive Nitrogen Laser Capacitors!" I convert wire ended capacitors to Doorknob Capacitors and try them in the Nitrogen Laser. Thanks for the suggestions from the previous video!
If you found this content useful, and would like to support this Channel, please consider donating: paypal.me/leslaboratoryHacking a Laser! MNL-100 Nitrogen Laser RS-232 Fibre Optic Interface Hack!Les Lab2021-01-13 | Episode 17
#laser #teardown
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A look inside an Industrial/Commercial Lasertechnik MNL-100 Nitrogen Laser! This is a beautiful piece of Laser engineering, and uses solid state switches as opposed to spark gaps or thyratrons! I hack up a fibre optic RS-232 interface and use the manufacturers software to control it. I also use a made Fibre coupling lens assembly and pump a home made Dye Laser with it.
This particular version is rated at 140uJ (51 kW peak power) at 24Hz
#optics #laserHow to make Inexpensive Nitrogen Laser Capacitors!Les Lab2020-12-22 | Episode 16
#laser #electronics #optics
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In response to questions for viewers, I substitute the expensive Doorknob Capacitor in one of my Nitrogen Lasers with inexpensive wire ended capacitors. Will it work? Watch the video to find out!