Device and method for spectroscopic measurement with an...

Details Device and method for spectroscopic measurement with an... Device and method for spectroscopic measurement with an...

2007-10-02

2007-10-02

Chowdhury, Tarifur (Department: 2886)

Optics: measuring and testing

By dispersed light spectroscopy

Utilizing a spectrometer

Reexamination Certificate

active

10933165

ABSTRACT:
A device and a method for spectroscopic measurement of the spectrum of a light beam. The method includes detecting the dispersed light fluxes of the beam on an imaging device comprising a matrix of photodetectors with active columns, directing the imaging device so that one wavelength is allocated to a line of photodetectors, determining for each light flux the exposure time τinecessary to measure a maximal intensity Imaxand the sub-matrix Miof photodetectors associated with the light fluxes, allocating to the sub-matrix Miof photodetectors an exposure time τ′iso that τ′iis the largest integer divider of the total integration time T smaller than τi, measuring and resetting, during the integration time T of said spectrum, at each time τ′i, the corresponding sub-matrix Miindependently of the other sub-matrices Mjwith j≠i, and measuring the spectrum of the beam at the time T.

REFERENCES:
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patent: 6038023 (2000-03-01), Carlson et al.
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patent: 0615115 (1994-03-01), None
patent: 2810186 (2000-06-01), None
French Application 03 50497 International Search Report.

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