Path: utzoo!mnetor!uunet!cadnetix.COM!rusty
From: rusty@cadnetix.COM (Rusty)
Newsgroups: sci.electronics
Subject: Re: HELP with LASRS and GRAPHICS!!!!
Message-ID: <2335@cadnetix.COM>
Date: 12 Apr 88 16:21:00 GMT
References: <4333@cup.portal.com> <61700002@convex>
Reply-To: rusty@cadnetix.COM (Rusty)
Organization: Cadnetix Corp.,  Boulder, CO
Lines: 35

In article <61700002@convex> ellert@convex.UUCP writes:
>
>I know of ....

Well, I've got a strange thing I need: some sort of transducer
to bounce a laser beam off of (in order to modulate it digitally).

But, before you think, 'Oh, that's easy", try the desired features
on for size:

  want to modulate at as high a rate as possible.  (150mHz would 
be great, but I'll settle for 500kHz, and 100kHz might work ok)

  digital modulation (two states: laser on, laser off) to be effected by
passing laser through what amounts to a (very thin) slit (ok, I'll
give it away - I plan to pass the laser beam through a telescope),
so beam deflection need not be too huge.

  budget is very important.  (I am self-funded - i.e. broke - for
this project)

Any ideas?  Could i use an ultrasonic transducer in some way?
What is the highest useable freq for an Ultrasonic xducer?  what is
its bandwidth?

how about taking the cover off of a crystal and frequency modulating
the crystal (very slightly, i realize)?  

The speed of liquid crystals is too slow, i think.  Anything else
like LC I could use? (Power is only in the 2-5 mW range at the moment)
-- 
    Rusty Carruth	N7IKQ		DOMAIN: rusty@cadnetix.com
    Cadnetix Corp.			UUCP:   cadnetix!rusty
    5775 Flatiron Pkwy.		        	{uunet,boulder,nbires}!cadnetix!rusty
    Boulder, CO 80301			(303) 444-8075