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<TITLE>sane-devel: Re: Which scanners REALLY provide 36 bit output? HP?</TITLE>
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<META NAME="Author" CONTENT="Stephen Williams (steve@icarus.com)">
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<META NAME="Subject" CONTENT="Re: Which scanners REALLY provide 36 bit output? HP?">
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<H1>Re: Which scanners REALLY provide 36 bit output? HP?</H1>
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<STRONG>From:</STRONG> Stephen Williams (<A HREF="mailto:steve@icarus.com?Subject=Re:%20Which%20scanners%20REALLY%20provide%2036%20bit%20output?%20HP?&In-Reply-To=<200012090129.RAA30252@icarus.com>"><EM>steve@icarus.com</EM></A>)<BR>
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<STRONG>Date:</STRONG> Fri Dec 08 2000 - 17:29:17 PST
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<LI><STRONG>Next message:</STRONG> <A HREF="0071.html">Steve Underwood: "Re: Which scanners REALLY provide 36 bit output? HP?"</A>
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<LI><STRONG>Previous message:</STRONG> <A HREF="0069.html">Dave Creelman: "Mustek 600 II EP support ?"</A>
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<A HREF="mailto:root@mauve.demon.co.uk?Subject=Re:%20Which%20scanners%20REALLY%20provide%2036%20bit%20output?%20HP?&In-Reply-To=<200012090129.RAA30252@icarus.com>">root@mauve.demon.co.uk</A> said:
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<EM>> It is possible to do a spectrographic scanner. As a first cut, take an
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</EM><BR>
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<EM>> ordinary scanner, replace the fluorescant tube with some sort of light
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</EM><BR>
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<EM>> that emits over a wider spectrum. Now, replace the linear imaging
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</EM><BR>
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<EM>> array with a square one, and stick a diffraction grating in the
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</EM><BR>
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<EM>> optical path.
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</EM><BR>
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<P>Huh, clever.
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<BR>
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You need a lot of light to do that. To get an N sample-per-pixel scan,
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<BR>
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you need at least N times as much light. You may be able to get step the
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<BR>
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line more slowly (let the CCD integrate over a longer period of time) but
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limits to patience may come into play.
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<BR>
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<P>We have experience making cameras that have multiple sensors, with the
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<BR>
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image split by a beam splitter, and the simple quantity of available
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light quickly becomes a limiting factor.
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<BR>
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<PRE>
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--
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Steve Williams "The woods are lovely, dark and deep.
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<A HREF="mailto:steve@icarus.com?Subject=Re:%20Which%20scanners%20REALLY%20provide%2036%20bit%20output?%20HP?&In-Reply-To=<200012090129.RAA30252@icarus.com>">steve@icarus.com</A> But I have promises to keep,
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<A HREF="mailto:steve@picturel.com?Subject=Re:%20Which%20scanners%20REALLY%20provide%2036%20bit%20output?%20HP?&In-Reply-To=<200012090129.RAA30252@icarus.com>">steve@picturel.com</A> and lines to code before I sleep,
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<A HREF="http://www.picturel.com">http://www.picturel.com</A> And lines to code before I sleep."
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<P><P><P>--
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Source code, list archive, and docs: <A HREF="http://www.mostang.com/sane/">http://www.mostang.com/sane/</A>
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To unsubscribe: echo unsubscribe sane-devel | mail <A HREF="mailto:majordomo@mostang.com?Subject=Re:%20Which%20scanners%20REALLY%20provide%2036%20bit%20output?%20HP?&In-Reply-To=<200012090129.RAA30252@icarus.com>">majordomo@mostang.com</A>
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