Spectrophotometer

Details Spectrophotometer Spectrophotometer

1976-06-17

1978-01-24

Evans, F. L.

Optics: measuring and testing

Range or remote distance finding

With photodetection

356 51, G01J 342

Patent

active

040701123

ABSTRACT:
A spectrophotometer which uses as a detector a silicon photocell and a phototube sensitive to short wavelengths. The light from the sample cell is divided into a smaller and a larger portion. The smaller portion is projected onto the silicon photocell and the larger portion, to the phototube. The two outputs are combined and amplified for indication. The whole of the light transmitted through the sample cell may also be projected to the phototube while the spectrophotometer operates in the short wavelength region and alternatively to the silicon photocell while the instrument operates in the long wavelength region.

REFERENCES:
patent: 2984146 (1961-05-01), Kwart et al.
patent: 3912393 (1975-10-01), Hossom et al.

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