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From: saj%yipeia@Sun.COM (Scott A. Jordahl)
Newsgroups: comp.graphics
Subject: Re: Color desktop scanners (a technical discussion begins)
Message-ID: <120402@sun.Eng.Sun.COM>
Date: 9 Aug 89 17:26:48 GMT
References: <1869@ucsd.EDU> <5368@ficc.uu.net> <658@hrc63.uucp>
Sender: news@sun.Eng.Sun.COM
Reply-To: saj@sun.UUCP (Scott A. Jordahl)
Organization: Sun Microsystems, Mountain View
Lines: 30

In article <658@hrc63.uucp> paj@hrc63.uucp (Mr P Johnson "Baddow") writes:
>In article <5368@ficc.uu.net>, cliff@ficc.uu.net (cliff click) writes:
>...
>> the intensity of the reflected light.  Use different colored lasers (or
>> filters on a white-light laser??) for different colors.  You probably
>...
>
>There is no such thing as a white laser.  Lasers produce monochromatic light.
WRONG!!  White light lasers DO exists.  I've used many in my time.
Unfortunately, most white light lasers are krypton-ion and are about a
meter in length, are water cooled, and consume LOTS of power (~60 amps).

Except for these minor details, this type of laser would make a GREAT
basis for a desk top scanner. :-)
The white light is indeed a mixture of all colors of the spectrum and can
be broken apart with the use of a prism.

>-- 
>Paul Johnson,         | `The moving finger writes, And having writ, moves on,'
>GEC-Marconi Research  |                    Omar Kyham when contemplating `vi'.
>------------------------------------------------------------------------------
>The company has put a radio inside my head: it controls everything I say!


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