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While not a lens shaped from ice there are people who have been working on lenses made from untraditional materials. For example here is a guy, Prof. Joshua Sil
by blcArmadillo 8y ago
While not a lens shaped from ice there are people who have been working on lenses made from untraditional materials. For example here is a guy, Prof. Joshua Silver's, who has been working on eyeglasses for the developing world. From https://www.medicalnewstoday.com/articles/302550.php https://www.medicalnewstoday.com/articles/302550.php:
> Each lens is made of two flexible membranes that move either inward or outward depending on the amount of fluid - a silicone solution - they contain.
> The lenses are connected to a small syringe that sits on each arm of the glasses, and the wearer can adjust a dial on the syringe to pump fluid in or out of each lens. When fluid is pumped in, the power of the lens is increased - correcting hyperopia, or farsightedness - while pumping fluid out decreases lens power, correcting nearsightedness.
Additionally he gave a Ted talk on the subject https://www.ted.com/talks/josh_silver_demos_adjustable_liquid_filled_eyeglasses?language=en https://www.ted.com/talks/josh_silver_demos_adjustable_liqui.... Pretty interesting stuff. Granted this is all circa 2009-2015. Not sure what the current status of the project is.
- moron4hire 8y agoI've been wanting to make a liquid lens VR headset to try to solve for vergence-accommodation conflict.
- dekhn 8y agodon't forget people making mirrors using spinning liquid: https://en.wikipedia.org/wiki/Liquid_mirror_telescope https://en.wikipedia.org/wiki/Liquid_mirror_telescope
- baybal2 8y agoMy favourites are the liquid crystal lenses. Essentially they are micron scale Fresnel lenses controlled by electric field. No moving parts, very thin, ideal for something like a camera module. I'm surprised that nobody managed to commercialise it in that niche yet.
- zeristor 8y agoDo you have a link for that? They have used holographic optical elements to make shorter SLR lenses, although I don't think the image quality was excellent, but if they went to the trouble it must have been fairly good.
- dekhn 8y agodoesn't really seem commercial grade yet: https://www.imaging-resource.com/news/2015/10/05/this-smartphone-camera-uses-liquid-crystal-and-electrical-currents-to-focus https://www.imaging-resource.com/news/2015/10/05/this-smartp...