Micro Lenses made with Photolithography. @HuygensOptics

Huygens Optics | Micro Lenses made with Photolithography. @HuygensOptics | Uploaded February 2020 | Updated October 2024, 3 hours ago.
I'm quite excited to show you the focal properties of my microscopically small lenses that I made using photolithography. These lenses are actually Fresnel zone plates which use diffraction as the method for focussing the light. They were made using the DIY maskless wafer stepper.

The lenses have more than one focal plane, and you can easily observe the 1st, 2nd and 3rd order focal planes when they are used in combination with monochromatic light sources.

I used a static image from a video on meta surfaces. Please check out this video if you want to know more about this subject: youtube.com/watch?v=ETx_fjM5pms

It is now possible to contribute financially to the Huygens Optics Youtube channel. Please refer to the "About"-page of the channel for details.

$Micro Lenses made with Photolithography. Im quite excited to show you the focal properties of my microscopically small lenses that I made using photolithography. These lenses are actually Fresnel zone plates which use diffraction as the method for focussing the light. They were made using the DIY maskless wafer stepper. The lenses have more than one focal plane, and you can easily observe the 1st, 2nd and 3rd order focal planes when they are used in combination with monochromatic light sources. I used a static image from a video on meta surfaces. Please check out this video if you want to know more about this subject: https://www.youtube.com/watch?v=ETx_fjM5pms It is now possible to contribute financially to the Huygens Optics Youtube channel. Please refer to the About-page of the channel for details.$ $Light Waves Visualized using Photon Sieves. The video shows how the optical wave front of a laser beam can be shaped by means of DIY photon sieves. It also shows how the quality and sharpness of the focal point in a diffraction pattern can be influenced by the number of diffractive apertures in the photon sieve surface. Contents: 00:00 General intro 00:43 Photon sieves explained 04:21 Manufacturing of photon sieves 06:27 Photon sieve diffraction series 10:05 Time-resolved visualizations explained Many thanks to Michal Miler for bringing the photon sieve to my attention. Reference to the article on achromatic photon sieves by Chiongxi Zhou:https://www.researchgate.net/publication/24192201_Experimental_study_of_a_multiwavelength_photon_sieve_designed_by_random-area-divided_approach More on the maskless wafer stepper project (link to playlist) : https://www.youtube.com/playlist?list=PLaLGh7vzNIRRuvbxZKHOUaeosIO4hpcsw If you are interested in maskless wafer steppers or how to build one yourself, make sure you check out this great video by Sam Zeloof as well: https://www.youtube.com/watch?v=Nxz_ENnmgtI The royalty free slo mo clip of the water wave at the end of the video could be displayed thanks to the video published on the Jim Quiter channel: https://www.youtube.com/watch?v=gS_tU6chC4A$ $Incoherent Wave Emitter This simulation shows a spatially- and temporally incoherent wave emitter that consists of around 100 individual wave sources. The sources are continuous but all have a slightly different emission wavelength. This results is the emission field and intensity distributions shown in the video. The simulation was made using a python script supplied by @DiffractionLimited The image files for the simulation can be downloaded here: https://huygensoptics.com/2D_wave_sims/non_coherent_emitter.png #physics #light #short$ $Gradient Index Lens Explained This is short is about how a Gradient Index Lens (or GRIN lens) works compared to how a normal confocal lens with curved glass interfaces operates. The diffraction inside the lens is probably due to the fact that the refractive index gradient is not exactly correct. The total gradient is approximated from 5 linear gradients instead of 1 smooth circular gradient. This is probably the reason for the observed interference pattern observed. The simulations were made using the code supplied by @DiffractionLimited Music: Nebular Focus by Dan Henig #optics #light #physics$

Making a Mirror with a Variable Surface Shape

Fourier Optics used for Optical Pattern Recognition

Optical Lens Centering using a LOH LZ-80.

Curve Generation using a Milling Machine (Short Impression)

$Maskless Wafer Stepper Part1: Optics Ive been planning to make a maskless wafer stepper for a long time. In the last few months, I finally found the time! This video is the first of 3 videos on the design- and build process. It discusses the optical aspects of the machine. 0:00 General intro 0:38 About Wafer steppers in general 1:12 Meta surfaces and flat optics 2:00 Principle and advantages of a maskless wafer stepper 4:36 Projection optics 6:47 Global layout of the machine 8:50 System overview I hope to make micro optics with this machine in the near future. By the way, not the standard meta surfaces, because the resolution will be too limited for that, but meta surfaces that combine both refractive and diffractive functionality. Currently Im still in the building process of the machine and the software. I have taken the liberty of using a few short clips in my video. Please give the makers credit by visiting the original videos or websites if you are want to know more: ASML video on EUV-wafer steppers: https://www.youtube.com/watch?v=jH6Urfqt_d4 Great video by science magazine with entry level info on meta surfaces https://www.youtube.com/watch?v=ETx_fjM5pms If you want to go a little deeper: https://www.youtube.com/watch?v=RBGwJE0ww7s https://www.youtube.com/watch?v=3qeE5A8HIWY https://www.youtube.com/watch?v=AM4yO0mjR4g By the way, the Nikon objective was bought at https://www.ebay.nl/usr/avr-sales. They gave me a very good price and exceptional service, so make sure to check them out for used tech stuff.$

CNC Radius Milling in Optics: the LOH Spheromatic Curve Generator.

$Making a Monolithic Telescope Part 1: Optical Design and Aspherics. Video Contents: 00:00 General Intro 00:56 Spherical is easy 01:32 Aspherical is hard 01:59 Ideal lens vs. spherical surface lens 03:17 The concept of the light ray 04:47 A little optics quizz 06:21 Optimum spot size using iterative numercal analysis 07:56 Use of optical design software (Zemax) 09:45 Theory of aspherics 10:54 Conical aspherics 12:02 Polynomial aspherics and even aspheres 14:24 Numerical optimization in aspherics 15:30 Effect of introducing an aspherical surface 16:55 Optical design of monolithinc telescopes 18:23 Material choice and CTE 20:52 Classical Cassegrain configuration 22:10 Schmidt Cassegrain configuration If you want to support the production of these videos, you can now become a Patron of the channel. You can find more information on : https://www.patreon.com/huygens_optics Reference to my original video on tiny monolithic telescopes: https://www.youtube.com/watch?v=HxwhCmO90UQ LInk to my video on conics: https://www.youtube.com/watch?v=WIl6FlUCHQg For the record, I do not have any commercial ties to any of the companies or individuals that are linked below. Zemax page for requesting a trial license of Optic Studio: https://www.zemax.com/pages/try-opticstudio-for-free If you want to know more about the workflow in Zemax, the great tutorial videos by Scott Sparrold of OpticsRealm are a good start: https://www.youtube.com/user/opticsrealm/videos Youtube video discussing the optical design of the James Webb telescope: https://www.youtube.com/watch?v=OE3ZowuvAJY The Thorlabs page with aspheric lenses and the formula: https://www.thorlabs.com/newgrouppage9.cfm?objectgroup_id=3835 I used a few short clips from the following Youtube videos, assuming this use is covered under the fair use policy by placing references to the channels and links to the corresponding videos in the description. Clip from Yuri Petrunins polishing 210mm lens: https://www.youtube.com/watch?v=ipwnK45_Kf4 Clip from Edmund Optics How an Aspheric Lens is Made: https://www.youtube.com/watch?v=CVDT3u1La6w Clip from Learn n hv fun Refraction of Light Through a Glass Slab[...]: https://www.youtube.com/watch?v=el8AUeZaljw Did I forget to mention you here? Let me know and I will set things straight.$

Building a Small Cleanroom for Photolithography.