SPECTROMETER

PROBLEM TO BE SOLVED: To reduce stray light as much as possible in a spectrometer wherein the F value of outgoing luminous flux is variable. SOLUTION: A light trapping member 20 having a plurality of projecting pieces 21 along the direction of an optical axis C just before the exit slit 16 of the sp...

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Bibliographic Details
Main Author KOBAYASHI TOMOMITSU
Format Patent
LanguageEnglish
Published 14.08.2008
Subjects
COLORIMETRY
MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT,POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRA-RED,VISIBLE OR ULTRA-VIOLET LIGHT
MEASURING
PHYSICS
RADIATION PYROMETRY
TESTING
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Summary:PROBLEM TO BE SOLVED: To reduce stray light as much as possible in a spectrometer wherein the F value of outgoing luminous flux is variable. SOLUTION: A light trapping member 20 having a plurality of projecting pieces 21 along the direction of an optical axis C just before the exit slit 16 of the spectrometer is made replaceable and detachable, and can be replaced easily with a light trapping member 20 whose projecting pieces 21 are different in projection length. By attaching a member 20 having projecting pieces 21 of shorter projection lengths so as not to interrupt diffraction light when the F value of the outgoing luminous flux is small, and attaching a member 20 having projecting pieces 21 of longer projection lengths when the F value of the outgoing luminous flux is large, the clearance between the envelope of the luminous flux and the inner edge of each projecting piece 21 is narrowed to interrupt and prevent stray light from passing through this clearance. COPYRIGHT: (C)2008,JPO&INPIT
Bibliography:Application Number: JP20070020919