Carl Zeiss S-planar lens pt.3: light collimation

[@Alexander_Sannikov]

wow this channel is crazy. i'm going to watch every single video, why did I not find it earlier?

[@idicalidical5343]

Thank you for this in depth review in practical optics! I wish your channel to rapidly grow. I've used the identical spherical mirror expansion of a filament light source for Schlieren photography with great result.

[@Kargoneth]

From 14 minutes to 4 seconds. An impressive improvement.

[@kilimnik1983]

Thank you for this. I work in optics lab and it was very informative.

[@jcjensenllc]

Excellent video. .

[@ricard458]

Great Video! :)

[@pedroedsos]

Hello. Can you tell me if there is any material or shape that only lets light pass through it in 1 direction, i.e., paralel rays of natural light? Thanks.

[@罗梦宇-i6p]

Would a fresnel lens work for this scenario?

[@HuygensOptics]

Yes, a fresnel lens could also work in this application.

[@罗梦宇-i6p]

@@HuygensOptics for this size, frensel lenses are quite cheap on taobao or aliexpress!

[@salmiakki5638]

@@HuygensOptics what kind of "optical precision" can fresnel lenses reach in practice?

[@hussainali9999]

Very interested, thank for shering

[@breedj1]

I'm not I to optics but electronics. Although I do own a telescope. I find this a very interesting video. Along with some of your others. Bedankt.

[@Veptis]

Instead of using a photomask, could you simply use a large format glass negative and make a photographic print at a really tiny scale? Also is it possible to turn the lens around to use it for enlarging instead of demagnification?

[@HuygensOptics]

Both things are possible. However, (de) magnification would only be 5x.

[@wflai98]

Thank you for this nice video and simple explanation. Is the LED really monchromatic at 405nm that does not cause any chromatic aberration？

[@cinemaipswich4636]

The best lenses eventually have parallel rays of light, hitting the sensor. Rectilinear optics leads to the best image that professionals seek. In focus from the center to the edge.