root@mauve.demon.co.uk said:
> It is possible to do a spectrographic scanner. As a first cut, take an
> ordinary scanner, replace the fluorescant tube with some sort of light
> that emits over a wider spectrum. Now, replace the linear imaging
> array with a square one, and stick a diffraction grating in the
> optical path.
Huh, clever.
You need a lot of light to do that. To get an N sample-per-pixel scan,
you need at least N times as much light. You may be able to get step the
line more slowly (let the CCD integrate over a longer period of time) but
limits to patience may come into play.
We have experience making cameras that have multiple sensors, with the
image split by a beam splitter, and the simple quantity of available
light quickly becomes a limiting factor.
-- Steve Williams "The woods are lovely, dark and deep. steve@icarus.com But I have promises to keep, steve@picturel.com and lines to code before I sleep, http://www.picturel.com And lines to code before I sleep."-- Source code, list archive, and docs: http://www.mostang.com/sane/ To unsubscribe: echo unsubscribe sane-devel | mail majordomo@mostang.com
This archive was generated by hypermail 2b29 : Fri Dec 08 2000 - 17:29:13 PST