PICO Projectors and Lithography

This is the place to discuss various hardware. Topic include:
- Display devices (Projectors, Lasers & etc..)
- Microcontrollers & RAMPs boards
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Cation
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Joined: Thu Mar 19, 2015 11:45 am
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PICO Projectors and Lithography

Postby Cation » Thu Apr 30, 2015 11:20 pm

Here's a good slide show covering how PICO projectors operate:

http://www.slideshare.net/Funk98/pico-p ... r-12565671

The problem that people are having with getting a PICO projector to work with a 3D printer is that the spectra produced by the three LED's or three lasers used (Red (635nm), Green (530nm) and Blue (460nm) in the PICO projectors are outside the sensitivity range of the resins they are using.

If the PICO projector only emits light in the three sprectra shown in the following graph then only resins sensitive to those same spectra will work.
http://upload.wikimedia.org/wikipedia/c ... pectra.png

One solution is to just use unmodified PICO projectors with resins that cure in the UV through Blue in the visible spectrum.

See this thread for more info: viewtopic.php?f=12&t=84&start=210#p9616

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