3D Printing Small Optical Structures

[BillTre]

Specialized 3D printers can now produce small optical elements:
Described here.

There is also a company that makes light shaping diffusers (for lamps) that control the light by controlling the interference patterns of the light due to microscopic structures on the surface of the diffuser film.
(You can get free samples from them.)
Its not clear how these guys made their surface bumps, probably not 3D printing, yet.

 

[chemisttree]

There is also a company that makes light shaping diffusers (for lamps) that control the light by controlling the interference patterns of the light due to microscopic structures on the surface of the diffuser film.
(You can get free samples from them.)
Its not clear how these guys made their surface bumps, probably not 3D printing, yet.

Their patent describes using a photopolymerizable film with an index matching fluid. It's chemistry!
Looks like they're using DuPont HRF700X318 photopolymer.