From: king@dciem.dnd.ca (Stephen King)
Subject: Re: PROD: Ultrasonic position sensors
Date: 25 Oct 1995 09:16:23 -0400
Organization: Defence and Civil Institute of Environmental Medicine


From: king@dciem.dnd.ca (Stephen King)

In article <46gsu0$f7u@nntp5.u.washington.edu>,
Roberto Puzone  <puzone@IGECUNIV.CISI.UNIGE.IT> wrote:
>I can't find infos on ultrasonic position sensor acctually
>commercially available.  It seems they can have lots of advantages:

The ultrasonic rangers used to be a product of Polaroid - they made them
for their SX-70 line of cameras - I don't know if they still do.

>low cost, high precision, low depend on elect-magn and metallic obj
>interference, fast.... (may be I excess with this list :-) A very
>simple kind was (is) in the powerglowe no? I know there are some much
>evoluted versions.

Yeah, you can do a lot with interferometry, if the math doesn't scare
you off.

>Is there anyone who has infos?

Try your local Polaroid office. 


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