INFRARED OPTICAL SYSTEM

An infrared optical system includes: a spherical lens unit (4) having an image-forming function as a whole and including one or more spherical lenses that form an image of an incident light beam from a subject; an aperture diaphragm unit (3) that limits transmission of the incident light beam throug...

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Bibliographic Details
Main Authors YANAGISAWA, Takayuki, KOBAYASHI, Satoi, NAKANO, Takayuki, YOSHIKI, Wataru
Format Patent
LanguageEnglish
French
German
Published 26.06.2024
Subjects
OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
OPTICS
PHYSICS
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Summary:An infrared optical system includes: a spherical lens unit (4) having an image-forming function as a whole and including one or more spherical lenses that form an image of an incident light beam from a subject; an aperture diaphragm unit (3) that limits transmission of the incident light beam through the spherical lens unit; an aberration correcting plate unit (1; 17) that is disposed at a preceding stage of the spherical lens unit, has at least one aspherical surface, and gives an optical path length difference for compensating an aberration to be generated in the spherical lens unit to the incident light beam; and a lens barrel unit (7) holding the spherical lens unit, the aperture diaphragm unit, and the aberration correcting plate unit.
Bibliography:Application Number: EP20210945119