Wide band grating spectrometer

Details Wide band grating spectrometer Wide band grating spectrometer

1976-09-13

1977-11-29

McGraw, Vincent P.

Optics: measuring and testing

Range or remote distance finding

With photodetection

350162R, 356 99, 356100, G01J 342, G01J 312

Patent

active

040603270

ABSTRACT:
A spectrophotometer includes an illumination section for illuminating a test sample, and a spectrometer portion for receiving light from a test sample and measuring the radiant energy thereof as a function of wavelength. The spectrometer includes an entrance slit and two stationary gratings for dispersing light admitted through the slit into two separate dispersed beams or spectra. The separate beams are focused upon linear arrays of photodiodes providing outputs proportional to the intensity of the light rays at the different wavelengths received thereby. The gratings produce different primary orders of dispersion so that the efficiency of operation thereof is relatively high across a relatively wide band of radiant energy.

REFERENCES:
patent: 3733131 (1973-05-01), Mould
patent: 3791737 (1974-02-01), Johansson

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