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Fresnel Diffraction Explained 

Jordan Louis Edmunds
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If you want to see more of these videos, or would like to say thanks for this one, the best way you can do that is by becoming a patron - see the link above :). And a huge thank you to all my existing patrons - you make these videos possible.
In this video, I go over the Fresnel diffraction integral, how to arrive at it, and how to put this integral into a more interesting form using convolution. I also briefly describe the concept of an optical transfer function, and figure out what this is for free-space propagation.
This is part of my graduate series on optoelectronics / photonics, and is based primarily on Coldren's book on Lasers as well as graduate-level coursework I have taken in the EECS department at UC Berkeley.
Hope you found this video helpful, please post in the comments below anything I can do to improve future videos, or suggestions you have for future videos.

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18 июн 2019

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Комментарии : 18   
@FDND-pl8wp
@FDND-pl8wp Год назад
God bless you sir!! I am trying to understand the course I took and your clear and short videos are helping me more than anything else. Please continue your amazing work.
@GeoffryGifari
@GeoffryGifari 7 месяцев назад
For diffraction of light, does the "thickness" of the aperture matter? Lets say that the aperture is a circular hole on a plank of wood, and that plank of wood has a thickness on the order of the hole diameter. What would the effect be? What if we choose a different plank of wood with different thickness?
@ramjad9731
@ramjad9731 3 года назад
Awesome lecture! This helped me make more sense of my lecture notes
@sanjaythorat
@sanjaythorat 3 года назад
@6:18 Did you mean Gin(kx)?
@Joshua-fr9fi
@Joshua-fr9fi 2 года назад
Great videos! thank you!!
@JordanEdmundsEECS
@JordanEdmundsEECS 2 года назад
Welcome!
@Pastisas
@Pastisas 5 лет назад
great videos! I'm currently working on a problem where laser light diffracts inside of glass sheet of 1mm thick (d) and leaves diffraction patterned damages on the other side of the glass. These damages are 1mm, 2,7mm and 4,5mm distance from the center (Xs). laser beam diameter is 30 microns (a). So i cant use Fresnel nor Fraunhofer diffraction to model whats happening because my diffraction angle is very big ( xs > d). Do you have any advice or insights?
@JordanEdmundsEECS
@JordanEdmundsEECS 5 лет назад
Sounds like a challenging problem! In that case you can still try using Fresnel diffraction and see if it fits the data you get (although it will probably deviate significantly). If more precision is important, I think you would want to fall back to the equation from which everything was derived, Huygen’s principle, and not make the small-angle approximation. You will also need to take into account the angular distribution of a radiating dipole (goes like cosine of the angle). The theory you are looking for is called Kirchhoff diffraction.
@omkarshinde2493
@omkarshinde2493 2 года назад
can you please make a breif vedio on this topic overall . I dont understand derivation but a theory or animation diagram might help for all. Also there are no other vedios on ytube currently that touch this topic with your perspective. plsss:(
@JordanEdmundsEECS
@JordanEdmundsEECS 2 года назад
On Fresnel diffraction specifically or diffraction in general? What would an outline of such a video look like?
@yogbrana
@yogbrana 3 года назад
rk sir rocks
@nicoloparacini633
@nicoloparacini633 Год назад
Am I deaf?
@haniefsofi
@haniefsofi 4 года назад
You don't have LECTURING SKILLS. It is very haphazard.
@JordanEdmundsEECS
@JordanEdmundsEECS 4 года назад
Thanks for the feedback :)
@meghuy6343
@meghuy6343 4 года назад
@@JordanEdmundsEECS you are positive man..😎👍
@jacobvandijk6525
@jacobvandijk6525 3 года назад
I couldn't agree more with you. Engineers aren't teachers. He proves it in every video.
@gt5490
@gt5490 3 года назад
In fact these are crash courses and the I regard them as very inspiring. For detailed derivations you'd better refer to a textbook.
@adrianschimmer8698
@adrianschimmer8698 2 года назад
YOU'RE A PIECE OF SHIT. I can capitalize my words too.
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