@HuygensOptics

@HuygensOptics

Huygens Optics | Optical Interferometry Part 2: Measuring Optics with a Zygo GPI LC @HuygensOptics | Uploaded October 2023 | Updated October 2024, 1 hour ago.
This is the second video on optical interferometry, which is dedicated to measuring the wavefront shapes of a mirror, 2 lens assemblies and 3 microscope objectives.

Contents:
00:00 Intro
02:04 Video camera upgrade
04:23 DFT-fringe software
06:57 Transmission Sphere reference calibration
12:29 Shape of a Zerodur Perkin Elmer wafer stepper mirror
14:55 Wavefront deformation of a Canon FD f/1.2 camera lens (1980)
18:10 Wavefront test of a modern Canon EF 24-105mm f/4 zoom lens
19:19 Microscope objective testing
22:44 Nikon Plan Fluor 10x / 0.30
23:17 Leica Fluotar 20x / 0.50
25:23 Nikon Plan APO 20x / 0.75

Link to Optical Interferometry Part 1:
youtube.com/watch?v=l32_QbcdUiw&t=614s

Link to the video on measuring MTF:
youtube.com/watch?v=1AzQ4y_qwrM

DFTfringe forum page:
groups.io/g/Interferometry/topics

DFT fringe download:
github.com/githubdoe/DFTFringe/releases

Dale Eason on YouTube:
youtube.com/@UCPj57WFSSLpVqPir7Im-kiw

lens config Canon F1.2 By Jake Low - Own work, CC BY-SA 4.0 (modified) commons.wikimedia.org/w/index.php?curid=75904563
Laser diffraction pattern By Wisky - Own work, CC BY-SA 3.0, commons.wikimedia.org/w/index.php?curid=15113998

Do you need to be referenced but I forgot to do that? Let me know and I will set it straight.

$Optical Interferometry Part 2: Measuring Optics with a Zygo GPI LC This is the second video on optical interferometry, which is dedicated to measuring the wavefront shapes of a mirror, 2 lens assemblies and 3 microscope objectives. Contents: 00:00 Intro 02:04 Video camera upgrade 04:23 DFT-fringe software 06:57 Transmission Sphere reference calibration 12:29 Shape of a Zerodur Perkin Elmer wafer stepper mirror 14:55 Wavefront deformation of a Canon FD f/1.2 camera lens (1980) 18:10 Wavefront test of a modern Canon EF 24-105mm f/4 zoom lens 19:19 Microscope objective testing 22:44 Nikon Plan Fluor 10x / 0.30 23:17 Leica Fluotar 20x / 0.50 25:23 Nikon Plan APO 20x / 0.75 Link to Optical Interferometry Part 1: https://www.youtube.com/watch?v=l32_QbcdUiw&t=614s Link to the video on measuring MTF: https://www.youtube.com/watch?v=1AzQ4y_qwrM DFTfringe forum page: https://groups.io/g/Interferometry/topics DFT fringe download: https://github.com/githubdoe/DFTFringe/releases Dale Eason on YouTube: https://www.youtube.com/@UCPj57WFSSLpVqPir7Im-kiw lens config Canon F1.2 By Jake Low - Own work, CC BY-SA 4.0 (modified) https://commons.wikimedia.org/w/index.php?curid=75904563 Laser diffraction pattern By Wisky - Own work, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=15113998 Do you need to be referenced but I forgot to do that? Let me know and I will set it straight.$

Light & Coherence part 2: Spatial Coherence (and the Double Slit Experiment)

Not a photon in sight! [#shorts]

$Making Optical Logic Gates using Interference In this video I look into the idea of using optical interference to construct different kinds of logic gates, both from a conceptual- as well as from the practical perspective. Contents 0:00 Intro 2:15 Logic gate operation 3:36 Optical logic gates 4:45 Concept of a diffractive logic gate 7:52 Practical aspects (photolithography and etching) 8:46 Wave front observation method 9:20 Results 13:51 Possible applications Webpage with detailed and complete information on logic gates: http://www.ee.surrey.ac.uk/Projects/CAL/digital-logic/gatesfunc/index.html The diffractive patterns were made by using a home-brewed windows Zone plate app and then modifying them further with photoshop. The Zone Plate app can be downloaded from: http://www.huygensoptics.com/assets/zp_writer.zip For Windows 10 and for personal use only. Virus scanners and Windows will nag about it being a rare / unknown file and make installation sometimes difficult. Sorry about that. Install this app at your own risk. An overview article on various known optical logic gates can be found in this paper: https://www.hindawi.com/journals/aot/2014/275083/ However it does not contain any mention of the configuration described in this video The video contains references to detail videos on the following subjects: Photolithography: https://youtu.be/Lf-ev2Fop_k Chromium photomask etching: https://youtu.be/foMT8gLYxBY Other diffractive optics (photon sieves): https://youtu.be/TshYfYIxR9E Microscope viewing method: https://youtu.be/TshYfYIxR9E$

Making OLED Displays

$Imaging at ASML A visit to ASML with a deep dive into diffraction and imaging: 0:00 Intro 3:14 How big big are chip patterns nowadays? 5:00 Arriving at ASML Veldhoven 5:50 Interview Sander Blok part 1 7:40 About diffraction and image formation 9:36 Fraunhofer (far field) interference / diffraction explained 11:15 Diffraction on photolithography masks 15:11 About critical dimension 17:27 Example of computational photolithography 19:23 Interview Sander Blok part 2 21:46 EUV is difficult... by the way, the frequency of the tin droplets apparently is 50.000 not 15.000 per second. Animations were made using a Phyton script for Nvidia cuda, which was supplied to me by https://www.youtube.com/@DiffractionLimited The script with instructions to install it can be downloaded from github: https://github.com/0x23/WaveSimulator2D Third party images / video: Sleepy guy: https://www.youtube.com/watch?v=bBqLCrIwHbA Source mask optimization: https://opg.optica.org/directpdfaccess/837c889c-5b88-4dcb-8bfbdda02863dd9a_441841/oe-28-22-33371.pdf If you cannot access the article, search for the title in google: Source mask optimization using the covariance matrix adaptation evolution strategy Royalty free music used: Road Trip - Slynk Sharp Edges - half.cool Floating - Early Birds All imagery inside the ASML manufacturing facilities is stock video material shown Courtesy of ASML and IBM. ASML YouTube Channel: https://www.youtube.com/@ASMLcompany Want to work at ASML?: https://www.asml.com/en/careers/find-your-job Into viewing wave simulations? Nils Berglund has a ton of them: https://www.youtube.com/playlist?list=PLAZp3rbgWLo3VO2rqVKyL1T6DUmnDAaEN Did I forget anyone? Please let me know and we will work it out.$ $Interferometer Interference This short video shows how the intensity distribution changes in a wave interferometer, when one of the mirrors is moved by 1/4 of a wavelength. A shift by 1/4 wavelength in the mirror position introduces a phase shift of 1/2 lambda (180 degrees phase shift) and introduces destructive interference in one of the wave return paths). You can see that destructive interference is actually about rerouting the intensity to somewhere else: in this case, the waves return in the direction of the wave source itself (located above the beam splitter), create a standing wave pattern between the incoming and outgoing waves. This wave simulation was made using the code supplied by @DiffractionLimited The image file for the simulation can be downloaded here: https://huygensoptics.com/2D_wave_sims/interferometer.png #short #light #physics #optics$ $Knowing the one-way speed of light So you think you have a brilliant idea about how to measure the one-way speed of light, only to discover that it contains a very trivial oversight. Luckily this initial failure was the start of a few new insights on the relationship between one-and two-way speed of light. Well, at least new to me... What do you think: is there a way that the one-way speed of light is not identical to the two-way speed of light? Content: 0:00 Introduction 0:30 Origin of the two-way speed of light definition 1:40 The Fizeau speed of light experiment 3:27 Trying to measure the one way speed of light (and fail) 12:07 Speed of light from the wave perspective 18:24 Problems related to opposing anisotropy in vacuum 21:23 Violation conservation laws (abstract) 22:23 But... when spatial anisotropy changes with time... The video contains 2 short clips of the following videos: @Veritasium: https://www.youtube.com/watch?v=pTn6Ewhb27k&t=626s @AlphaPhoenix: https://www.youtube.com/watch?v=YMO9uUsjXaI Thumbnail in light of Yodas Light Sabre from Star Wars For the simulations, I used a Python script supplied by @DiffractionLimited End music: Floating - Earlybirds Special thanks to Physbuzz for interesting views and discussions. If you enjoy coding waves, check out this page: https://www.mathandcode.com/2024/04/21/waveequationint.html$

Making Tiny Fresnel Lenses during a Pandemic

$Ray/Wave Racing Championships 2023 #light #physics This wave / lens simulation was made using the Python wave simulation script provided by @DiffractionLimited. The link to the source code on github can be found in the description of this particular video: https://www.youtube.com/watch?v=N5a06o3ghzU$

Camera Mirror Lenses Part 1: Visual and Interferometric Testing

$About Laser Speckle The video shows a simulation of a phenomenon called speckle. Its best known as the granular interference pattern observed if we shine a coherent light of a laser at a diffuser. You can also observe it from a medium that contains small scattering particles. The simulation shows that it is caused by small phase differences that are introduced in the light by non-uniformity of a medium The green laser speckle image is taken from Wikipedia (copyrights Steve Jurvetson) and shown here under the Creative Commons license 2.0 (https://creativecommons.org/licenses/by/2.0/) Simulations made using the Python code suplied by @DiffractionLimited #physics #light$

Optical Interferometry Part 2: Measuring Optics with a Zygo GPI LC @HuygensOptics