Optical beam-switching chopper

Details Optical beam-switching chopper Optical beam-switching chopper

1978-04-27

1979-09-25

McGraw, Vincent P.

Optics: measuring and testing

By dispersed light spectroscopy

Utilizing a spectrophotometer

250233, 350285, G01J 342, G05D 2500

Patent

active

041689100

ABSTRACT:
An improved optical chopper, developed particularly for use in a double beam atomic absorption spectrophotometer, receives light beams from two separate sources and sequentially switches them into two separate paths and instantly thereafter the second light beam enters the first path, followed immediately by the first beam entering the second output path and then the second beam entering the second path; alternatively, the chopper is arranged so that the first light beam enters the first output path followed by the first light beam entering the second output path, and then the second light beam enters the first path and the second light enters the second path; also, during one segment of the choppers cycle, both beams are blocked from both output paths.

REFERENCES:
patent: 3901601 (1975-08-01), Lahmann

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