Optics: measuring and testing – Photometers – Comparison
Patent
1975-01-06
1976-01-13
Smith, Alfred E.
Optics: measuring and testing
Photometers
Comparison
250233, 350274, 356204, G01J 110
Patent
active
039320413
ABSTRACT:
A cylindrical block is provided with two ducts, forming a V whose legs terminate in exit windows in one axial end face of the block. A light source is disposed in the bottom of the V to direct light into both ducts. The block is further traversed by a bore, terminating as to one end in between the windows, avoiding the ducts and terminating in an offset position relative to the V-bottom and the light source at the other end of the block. A shaft traverses this bore for rotating a shutter in front of the windows. A complementary, light receiving unit is disposed with misaligned entrance windows in front of the unit windows, but their centers are traversed respectively by the optical axes of the ducts.
REFERENCES:
patent: 2227147 (1940-12-01), Lindsay
patent: 3709600 (1973-01-01), Ganshorn
patent: 3715153 (1973-02-01), Schunck et al.
Apel Willy
Drager Achim
Fabinksi Walter
Haberditz Wilhelm-Rudiger
Staab Joachim
Hartmann & Braun Aktiengesellschaft
Rosenberger Richard A.
Siegemund Ralf H.
Smith Alfred E.
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