Spectrophotometer operating at discrete wavelengths

Details Spectrophotometer operating at discrete wavelengths Spectrophotometer operating at discrete wavelengths

1983-06-09

1986-01-28

Evans, F. L.

Optics: measuring and testing

By shade or color

356420, G01J 342

Patent

active

045667977

ABSTRACT:
The invention relates to a spectrophotometer operating at discrete wavelengths comprising diodes to emit variable, substantially monochromatic radiation for irradiating a sample (10) to be tested, a radiation detector (12) sensing the intensity of the radiation reflected or transmitted by the sample (10) and a signal processing unit connected to the radiation detector (12). The diodes comprise radiation sources (2) emitting substantially monochromatic radiation of different wavelengths, a holder (1) supporting the radiation sources (2) and an optical arrangement (5,6) for transmitting the radiation emitted by the radiation sources (2) successively towards the sample (10). The optical arrangement may comprise at least one mirror (5) supported rotatably with respect to the holder (1). The spectrophotometer is preferably provided with a control unit (3) to operate the radiation sources (2) corresponding to the angular position of said at least one mirror (5), whereby only that one of the radiation sources (2) is operating the radiation of which is just transmitted by the mirror (5).

REFERENCES:
patent: 3523748 (1970-08-01), Chisholm et al.
patent: 3910701 (1975-10-01), Henderson et al.
patent: 3935463 (1976-01-01), Jacobsen
patent: 3994590 (1976-11-01), Di Martini et al.
patent: 4011009 (1977-03-01), Lama et al.
patent: 4105333 (1978-08-01), Kaule et al.
patent: 4305664 (1981-12-01), Akitomo
Bausch & Lomb Brochure-Atomic Absorption.

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