Grating photometer

Details Grating photometer Grating photometer

2007-09-13

2009-12-01

Toatley, Jr., Gregory J (Department: 2877)

Optics: measuring and testing

By dispersed light spectroscopy

Utilizing a spectrometer

Reexamination Certificate

active

07626697

ABSTRACT:
The present invention provides a grating photometer comprising a light splitting box, a preamplifier box, a photodiode array and optical assembly. The light splitting box has a light splitting chamber. There are provided a first extinction hole and second extinction hole respectively on the side wall of the light splitting chamber and on the preamplifier box to correspond to zero order spectrum line. The first hole is a through hole and the second hole is a blind hole. The configuration of the first and second extinction holes direct the zero order spectrum to go into the second extinction hole, as a result, generates a rather small number of stray light in the light splitting chamber coming from the scattering of the zero order spectrum from the second extinction hole, thus suppresses effectively the stray light and improves the signal-to-noise ratio of the photometer.

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China patent application No. 200620014767.0, International Search Report dated Aug. 8, 2007 (no translation).

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