The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 21, 2026
Filed:
Oct. 10, 2023
Mitsubishi Electric Corporation, Tokyo, JP;
Wataru Yoshiki, Tokyo, JP;
Satoi Kobayashi, Tokyo, JP;
Takayuki Nakano, Tokyo, JP;
Takayuki Yanagisawa, Tokyo, JP;
MITSUBISHI ELECTRIC CORPORATION, Tokyo, JP;
Abstract
An infrared optical system includes: a spherical lens unit 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 that limits transmission of the incident light beam through the spherical lens unit; an aberration correcting plate unit 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 holding the spherical lens unit, the aperture diaphragm unit, and the aberration correcting plate unit.