Thread: Custom Booklight for the 505 (any interest?)
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Old 10-05-2007, 01:46 PM   #8
obelix
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Join Date: Oct 2006
Quote:
Originally Posted by NatCh View Post
I'd really like to know more about that myself.
One of the patents:

http://www.google.com/patents?id=pkI...rooves#PPP1,M1

I also read (cannot find right now) some publication in one of the optics journal with calculations and experiment proving triangular grooves of 10 microns with 100 micron separation.

This technology was widely used, for example, in commercially available illuminators for GameBoy console by Nintendo (though the size was not that large as it needed).

I tried to make also similar plate myself by polishing the plastic with very fine sand paper. It scatters light well, but, unfortuantly irregular pattern with uncontrolable size of the grooves makes it not clear enough for comfortable reading.

Also, have a look at the dreams (?) here:

https://www.mobileread.com/forums/sho...9&postcount=11
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