Re: LCDs and UV

--- In CAD_CAM_EDM_DRO@yahoogroups.com, Jon Elson <elson@...> wrote:

>
> Also, if you can keep it cool, the DLP can handle a
> LOT of
> light -- like a 1000 W Xenon arc lamp focussed on a thumbnail. The
> trick is the
> DLP shines the mirror spots on the target, or on a black beam dump.
>The LCD absorbs the light not wanted. Turn the "screen" black, and

it >has to absorb the entire 1000 W in the polarizers! Poof!

The question becomes how much power does the hardening of the resin
require? Assuming the very near UV resin was used as per the paper
(460nm). A wide field system has the advantage over a scanning on of
speed so if it requires greater exposure times because of lower power
it might not be so bad.

DLPs are certaily nice but I had a feeling they were a tad expensive
to play with. Anyone any ideas?

Also note that the system linked to is inverted, that means no
complicated fluid leveling systems are required.

Graham