Re: Flying Spot Scanners
By Larry Toto
> From: "Horst Mohr" <mohr@nemeter.dinoco.DE> <
> To: "Robbie Rhodes" <rrhodes@foxtail.com> <
> I followed the discussion about light sources and photocopy technics <
> with interest. Is there already a possibility to direct a slim light <
> beam, laser or not, very fast(!), to every fixed point in a line by <
> computer control?
Horst,
It is possible. I was hired in the 1978 to build a flying spot scanner from scratch for a research lab at Temple University in Philadelphia. I used an 5 milliwatt helium-neon laser and galvanometer mounted mirrors which were controlled by the sweep signal of an oscilloscope and the output of a wave generator. The oscilloscope and wave generator were soon replaced by a small Z80 microprocessor. We used the scanner to digitize radiographic images for feature analysis in tumor detection research. A large collecting lens was used to gather the light to a small (1 cm) solid state detector. It was used for several years after that.
Larry Toto
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(Message sent Tue 20 Feb 1996, 14:56:19 GMT, from time zone GMT-0500.) |
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