OPTICAL SENSOR

PURPOSE:To make the dependency of the incident angle of detected light quantity small by providing a cylindrical surface which is nearly parallel with an optical axis passing the center part of a condensing lens on a part of the lens. CONSTITUTION:The cylindrical surface 9 which is nearly parallel w...

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Bibliographic Details
Main Authors OKUDA HIDENORI, MATSUNAMI TAKAO
Format Patent
LanguageEnglish
Published 25.04.1990
Subjects
COLORIMETRY
MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT,POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRA-RED,VISIBLE OR ULTRA-VIOLET LIGHT
MEASURING
OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
OPTICS
PHYSICS
RADIATION PYROMETRY
TESTING
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Summary:PURPOSE:To make the dependency of the incident angle of detected light quantity small by providing a cylindrical surface which is nearly parallel with an optical axis passing the center part of a condensing lens on a part of the lens. CONSTITUTION:The cylindrical surface 9 which is nearly parallel with the optical axis passing the center of the condensing lens 5 is provided on the photodetector 6 side of the condensing lens 5. When the incident angle is 90 deg., a light beam is refracted by the parallel surface 9 in a direction where the incident angle becomes small and the light passing through the lens 5 at small incident angle by a light transmission window 7 can be effectively detected. The detected quantity of light at high incident angle becomes relatively large.
Bibliography:Application Number: JP19880266389