Detector for use in optical measuring instruments

Details Detector for use in optical measuring instruments Detector for use in optical measuring instruments

1982-03-24

1984-04-24

Evans, F. L.

Optics: measuring and testing

By dispersed light spectroscopy

Utilizing a spectrophotometer

250207, 356448, G01J 342

Patent

active

044444990

ABSTRACT:
A detector for use in optical measuring instruments such as a double-beam spectrophotometer, comprising a photoelectric element having a photosensitive surface and a beam mixer disposed adjacent the photosensitive surface for causing each of two alternate light beams to be projected evenly and uniformly onto the photosensitive surface of the photoelectric element thereby to eliminate errors which would otherwise be caused in the result of measurement due to local difference in sensitivity of the photosensitive surface of the photoelectric element. The beam mixer comprises a symmetrical pair of light diffusing plates so arranged as to form a roof-shaped configuration and a tublar body having one end opening closed by the pair of light diffusing plates and the opposite end opening closed by the photosensitive surface of the photoelectric element.

REFERENCES:
patent: 2930281 (1960-03-01), Dunn
patent: 3504978 (1970-04-01), Shibata et al.
patent: 3516746 (1970-06-01), Shibata et al.

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