As a student your never really see the use for theory (unless it's personally inspiring). However, outside the classroom you may need this information for personal or business endeavors. Your video clearly explains this concept an currently with all the VR developments a lot of people find value in your work. Put simply thanks David, good work and I sort of wish I had you as a teacher growing up.
In less than 3:40 you have perfectly explained to me what I've been trying to grasp for decades. I've always been fascinated by these lenses and have had an idea of the science behind it, even after reading multiple papers on the subject. Thanks to you, I now have a grasp of the properties involved and no longer just an 'idea'.
This is such an amazing way of explaining this concept! Thank you so much for this physical representation. One day I'd like to attempt building one to see if I can create a solar-powered blacksmithing forge.
Best vid of its kind that I have ever seen! Marvellous, congrats, everything. I have double vision but my optical consultant has access to plastic Fresnels that he can stick on to my specs, he determined what power to use and bingo! double vision corrected!
Well done! I am trying to understand how a bifocal and trifocal inter ocular lens (IOL)-used for cataract surgery lens replacement-works. A Fresnel lens is at the heart of the technology. This explanation is so clear and just what I was looking for. Thank you so much!
I loved this explanation, both the verbal and the neat visuals. I have been trying to figure out Fresnel lenses for a minute, this was an "aha" moment. Thank you...
Thank you! I’m in the middle of designing a product for a hobby and this was super super useful in actually knowing what lense I would need in terms of someone who’s never dealt in optics before
@@mad.scientist it’s a solar engraver for some local Amish folks looking to wood burn large tables. Putting a fresnel lense on a gimble with a low friction base it can be set on the table, adjusted for focus, then just slid around to engrave an image. Drawing it with pencil first helps it burn much faster from what I’ve seen too.
great video David :) you helped me a lot in my physics presentation at school and the class was so enthusiastic and listened through this, otherwise pretty boring, topic of lenses ^^
Well, I’m sure I’ll need this information one day (why would UA-cam recommend this otherwise, right?) With crystal clear explanation like this I don’t think I’ll ever forget how it’s made :) So thank you!
I thought a while ago about how you could make a flat lens by stacking specifically shaped layers of materials gradually larger/smaller refractive indices, so as to create a gradient without needing a lens. Then I found out, it's already been thought of and is being looked into. I didn't realize how similarly fresnel lenses work, compared to this concept as well.
Wow 😲, inside the Opera house Sydney, its shape like the outer rings of Fresnel lens it also has those reflector curtains inbuilt into its structure, it was said the original artitech left half way through when he discovered what it would be used for.
Congratulations for this short and amazing explanationon how fresnel lenses work. This platform let us spread all we know and from MEETOPTICS we are proud to be part of the photonics community and to help engineers and researchers in their search for optical lenses through our site, from prisms to mirrors and fresnel lenses.
I was a merchant mariner a dozen years of my working life because there were no more lighthouse keeper's jobs. I hope somewhere in my past I had at least one life where I tended lights A very succinct yet simple tutorial. You've garnered a new subscriber
I’m surprised this doesn’t have a million hits. Fresnel may have been a genius, but your lesson is a close second. Great job !
Thank you
Thank you very much.
As a student your never really see the use for theory (unless it's personally inspiring). However, outside the classroom you may need this information for personal or business endeavors. Your video clearly explains this concept an currently with all the VR developments a lot of people find value in your work. Put simply thanks David, good work and I sort of wish I had you as a teacher growing up.
this is the best explanation of a fresnel lens ever...
Yup
Well thank you
Thanks
Yes
Have to say after all these years, I can finally understand a Fresnel lens came into existence 😊
Wow! EXCELLENT explanation 😮
Thanks❤
This video should've popped up first when I typed "fresnel lens explained". Could've saved lot of my time.
You're lucky you have a keyboard, I had to find this video with just my mouse and the clicker button
Wow!! Is it really that simple? With teachers like these science lectures just become fun. Thank you so much. Sir. 🙏
this is brilliant! i've got a degree in physics including optics but never thought of a fresnel lens quite this way
In less than 3:40 you have perfectly explained to me what I've been trying to grasp for decades. I've always been fascinated by these lenses and have had an idea of the science behind it, even after reading multiple papers on the subject. Thanks to you, I now have a grasp of the properties involved and no longer just an 'idea'.
Glad to help.
Well done! They should demonstrate this at every lighthouse visitor center.
been a sailor a long time. finally, i understand the fresnel lens MUCH BETTER! thanks!
Thank you. This has been bugging me for decades!
You are welcome
Now that was teaching comprehension!
Best description of the Fresnel lens I’ve ever seen.
GREAT TEACHER!
PERFECT VISUALISATION!
That's a great and concise illustration of the principles and the application. Thank you for helping clarify the critical understanding.
Thank you
👍👍👍👍👍 The presentation and explanation of how a fresnel lens is a "work of art".....Bravo!!! 5 Stars, EXCELLENT! and only 218 seconds! 🙏🙏🙏🙏🙏
I've always wondered. Now I know. Absolutely brilliant.
Excellent "old school" style with the moving pieces! I hope many more will see and benefit from this succinct demonstration. Thank you.
Wow, what a terrific explanation! Thank you.
Easily the best demonstration I've seen yet! Well done, sir.
The best explanation ever! Thank you Sir
A terrific easily understandable explanation. Thank you.
This is such an amazing way of explaining this concept! Thank you so much for this physical representation. One day I'd like to attempt building one to see if I can create a solar-powered blacksmithing forge.
Great explanation. And remarkable invention by Mr.Fresnel. I would have been interesting to see how he actually crafted his first lens..
Great lecture, have a raise in pay!
This is just pure unadulterated intellectual educational elegance. Do not find better words. Awesome experience to watch this. Thank you professor 🙂
That's it?... bloody amazing. How come I never learnt about this in my optics course? I was robbed of a very cool education!! Thanks David.
Best vid of its kind that I have ever seen! Marvellous, congrats, everything. I have double vision but my optical consultant has access to plastic Fresnels that he can stick on to my specs, he determined what power to use and bingo! double vision corrected!
Thank you, I’m glad things went well with the specs.
Brilliant David! Now I know all about a Fresnel lens!! Thank you!!
Thank you for your nice explanation. I visited a lighthouse in my vacation some days ago.
Magnificent in its simplicity. Thank you!
Glad you like it.
What an awesome explanation. Thanks very much for this.
wow wow ..... its super video.... sir you know very well how to teach .... its realllllllly super
wow! that is an impressive explanation of the fresnel lens! thank you very much!
Every once in a while I find one of these gems that has been out there for a while and this is definitely one of them 👍👍
Thank you. An excellent presentation.
Best example!! Thank you so much
Great :) Thanks for that, I loved it :)
Well done! I am trying to understand how a bifocal and trifocal inter ocular lens (IOL)-used for cataract surgery lens replacement-works. A Fresnel lens is at the heart of the technology. This explanation is so clear and just what I was looking for. Thank you so much!
Thank you, you are more than welcome.
Brilliantly explained.
He's right.
The lens is definitely cool.
Brilliant!! Never knew this but what an awesome explanation. Thank you for sharing your knowledge in such a compelling way.
That was a beautiful explanation, thank you.
I loved this explanation, both the verbal and the neat visuals. I have been trying to figure out Fresnel lenses for a minute, this was an "aha" moment. Thank you...
Thank you! I’m in the middle of designing a product for a hobby and this was super super useful in actually knowing what lense I would need in terms of someone who’s never dealt in optics before
Glad to be useful, I would like to know more about your product.
@@mad.scientist it’s a solar engraver for some local Amish folks looking to wood burn large tables. Putting a fresnel lense on a gimble with a low friction base it can be set on the table, adjusted for focus, then just slid around to engrave an image. Drawing it with pencil first helps it burn much faster from what I’ve seen too.
Thank you.
Brilliant!! So simple and concise that even I understand it now.
Woah!!!!!!!! NO WORDS!! AWESOME!! USEFUL!!
Great, glad you like it
Wow, that makes so much sense.
One of the best physics of stuff video on internet ever!
Phenomenal lesson. Thank you.
Thank you. A very clear explanation - you obviously put some thought (and ingenuity) into it!
That was a wonderful visual explanation, thank you. The definition of concise.
WOW what an interesting explanation!
Fantastic explanation. Very very easy to follow.
Great presentation! Highly educational and easy to understand new knowledge. You really have the teacher‘s gift.
great video David :)
you helped me a lot in my physics presentation at school and the class was so enthusiastic and listened through this, otherwise pretty boring, topic of lenses ^^
glad to help
Awesome video, awesome comments. Congrats
Well, I’m sure I’ll need this information one day (why would UA-cam recommend this otherwise, right?) With crystal clear explanation like this I don’t think I’ll ever forget how it’s made :) So thank you!
You are welcome.
Wow what a teacher!! 👍👍
Excellent explanation!
Glad you think so! Cheers, David
Use them all the time, never understood how they work, excellent and simple explanation, Thanks.
Glad you found it useful.
Nothing is more creative than knowledge. Congratulations! I will share it on my blog!
I thought a while ago about how you could make a flat lens by stacking specifically shaped layers of materials gradually larger/smaller refractive indices, so as to create a gradient without needing a lens. Then I found out, it's already been thought of and is being looked into. I didn't realize how similarly fresnel lenses work, compared to this concept as well.
Thank you so much for sharing.
thank you I've been looking for this type video for so long perfectly explained
What a nice explanation!
Simply one of the best and most beautiful explanations.
Hey, thanks, Brother. That was awesome. Very informative.
You’re welcome
Amazing and simple to follow lesson. Very well explained! Thanks
Woww! This is a great explanation!!!
Awesome explainations, cheers
The best explanation ever. Valid forever 😎⚡
very well explained. thank you!
Short and intuitive. I love it.
This so eloquently explained. Thank you.
Awesome video! Made me understand it completely in just 3 minutes
Really nice explanation
Simply amazing. Thank you
You’re welcome
Things I didn't even knew I wanted to know... Very well explained.
well explained, thank you.
You absolutely nailed this concept this is such an impressive video
Thank you. Sleepy and grumpy? I’m guessing that, like me, you follow politics too😊
Perfect example!
Thanks for this brother. You're an amazing educator
Great video! Thanks a lot
Wow 😲, inside the Opera house Sydney, its shape like the outer rings of Fresnel lens it also has those reflector curtains inbuilt into its structure, it was said the original artitech left half way through when he discovered what it would be used for.
wow, really impressive
Taken em to SCHOOL!!!!!!!!!!! Loved it;)
Well done. Thanks.
Congratulations for this short and amazing explanationon how fresnel lenses work. This platform let us spread all we know and from MEETOPTICS we are proud to be part of the photonics community and to help engineers and researchers in their search for optical lenses through our site, from prisms to mirrors and fresnel lenses.
Incredible explanation
Sorry, I was hoping it was credible.
@@mad.scientist i am not native speaker, i hope it is a joke and my English is not that bad 😂 😂 😂
Your English is much better than my French and I do appreciate your comment. Thank you, I hope you like my other videos.
Thank you for the time and effort you put into making this! Very well explained!
Glad you liked it, thank you.
This is genuinely interesting, even though I have nothing to do with Lenses what so ever.
I was a merchant mariner a dozen years of my working life because there were no more lighthouse keeper's jobs.
I hope somewhere in my past I had at least one life where I tended lights
A very succinct yet simple tutorial.
You've garnered a new subscriber
Thank you
What an absolutely amazing explanation!
wow great presentation
And "just like that"... I can see :O) Thanks so much
WOW! that was amazing!
Same thing is used in Technis Symfony EDOF lens for human eye lens replacement. Exact same. Pretty cool.
I did not know that, thanks for the information
Thank you so much. I have been reading trying to figure out from equations but this is a wonderful explanation. Thanks
awesome. well done.
excellent demonstration... the best ... thank you.