Re: ATM Death of a Mirror

[andydtg@phoenix.net]

Richard Schwartz wrote:
>
>Now, about the tester....   I have been going nutz trying to diffuse the
>light from an LED.  In the slitless configuration, the grain in the lamp
>becomes little lines.  I have tried five layers of scotch tape, and that
>is not enough.
>
>One of my neighbors has suggested a frosted light bulb.  So my next
>experiment will involve breaking even MORE glass.

We used stuff called 'opal glass' to make light diffusers in the lab.
It was about 1/8 to 1/4" thick & available from Edmund Scientific.

Lately I've been using white diffuse plexiglass, same thickness, to make
flat field full aperture diffuserd for CCD work. If anyone wants a small
piece, I have lots of scraps, just send an SASE. The plexiglass is much
easier to cut & mount than the glass & works just as well.

Andy Saulietis / DTG Alt-Az-Fp Drive Systems
HDPE Worm Gears, Custom designs & Machine work
12617 Harriet Ln
Santa Fe, TX 77510 USA
409-925-8854 Voice/Fax
e-mail: andydtg@phoenix.net