PSN-L Email List Message

Subject: Re: Not so simple photoelectrics, or are they?
From: ChrisAtUpw@.......
Date: Tue, 29 May 2001 17:04:18 EDT


In a message dated 29/05/01, twleiper@........ writes:

> All this talk about precision matching and ambient light,
> spectral response, etc., seems crazy. If you really must use
> a photographic system (without film on a drum) why take
> 

Dear Tom,

       Was anyone talking about photographic techniques? We were considering 
the precautions / choices necessary to get optical detection methods to work 
OK for very small movements. How would your method cope with movements from 1 
sec of arc down to maybe 1/100 sec of arc? I would be very interested to read 
your calculations.

       Regards,

       Chris Chapman


In a message dated 29/05/01, twleiper@........ writes:


All th is talk about precision matching and ambient light,
spectral response, etc., seems crazy. If you really must use
a photographic system (without film on a drum) why take
a lesson from some age-old aeronautical techniqes. VOR


Dear Tom,

      Was anyone talking about photographic techniques? We were considering
the precautions / choices necessary to get optical detection methods to work
OK for very small movements. How would your method cope with movements from 1
sec of arc down to maybe 1/100 sec of arc? I would be very interested to read
your calculations.

      Regards,

      Chris Chapman


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Larry Cochrane <cochrane@..............>