Optics: measuring and testing – For light transmission or absorption – Of fluent material
Patent
1978-05-12
1980-02-12
Corbin, John K.
Optics: measuring and testing
For light transmission or absorption
Of fluent material
250576, 350294, 356246, G01N 2124, G01J 142
Patent
active
041881265
ABSTRACT:
Photometer of the type comprising two facing mirrors, means for introducing a light beam between said mirrors, extraction means for said light beam after multiple reflections on the mirrors and means for introducing a fluid to be measured between these mirrors, wherein the two mirrors are concave mirrors, whose centers of curvature are slightly staggered relative to one another and wherein it comprises a field optics by transmission disposed in the vicinity of the centers and which optically conjugates the mirrors, the light beam introduction means comprising a first optical system having an exit pupil in the vicinity of the field optics, the extraction means of the light beam comprising a second optical system having an entrance pupil in the vicinity of the field optics, said entrance and exit pupils being optically conjugated by the action of the multiple reflections on the mirrors.
Particular applications of the photometer are to the measurement of the turbidity of nuclear reactor and river waters or to the detection of pollutants in liquids or gases.
REFERENCES:
patent: 2779230 (1957-01-01), White
patent: 3436665 (1969-04-01), Rigrod
patent: 3469920 (1969-09-01), Dumartin et al.
patent: 3518001 (1970-06-01), Hell
patent: 3524066 (1970-08-01), Blakkan
patent: 3531204 (1970-09-01), Holland et al.
patent: 3861809 (1975-01-01), Hall
Boisde Gilbert
Boissier Alain
Commissariat a l''Energie Atomique
Corbin John K.
Rosenberger R. A.
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