Re: spectrometer -- two dimensional imager

On Tue, Nov 22, 2011 at 8:51 PM, Simon Quellen Field <sfield@scitoys.com> wrote:
> Use two fibers.

one bypassing the sample?

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> On Tue, Nov 22, 2011 at 4:45 PM, Nathan McCorkle <nmz787@gmail.com> wrote:
>>
>> On Tue, Nov 22, 2011 at 3:40 PM, John Griessen <john@industromatic.com>
>> wrote:
>> > On 11/22/2011 12:32 PM, Simon Quellen Field wrote:
>> >>
>> >> With a 2D sensor, you get a rectangle of light from a slit going
>> >> through a
>> >> grating.
>> >> If the sample is only in the top half of the slit, and the bottom half
>> >> of
>> >> the slit lets
>> >> unfiltered light through, then you can simply compare the values in the
>> >> top half
>> >> with those in the bottom half to get the percentage of light that the
>> >> sample has
>> >> absorbed. This is nice, because each image calibrates itself.
>> >
>> > Sounds just right for a OSHW spectrometer.
>>
>> If you were connecting via a fiber, how could you do this?
>>
>> >
>> > JG
>> >
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>> Nathan McCorkle
>> Rochester Institute of Technology
>> College of Science, Biotechnology/Bioinformatics
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Nathan McCorkle
Rochester Institute of Technology
College of Science, Biotechnology/Bioinformatics

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