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:
Dec. 02, 2025
Filed:
Aug. 03, 2021
Applicant:
Nittoh Inc., Nagano, JP;
Inventor:
Takahiko Matsuo, Nagano, JP;
Assignee:
Nittoh Inc., Nagano, JP;
Primary Examiner:
Int. Cl.
CPC ...
G02B 13/16 (2006.01); G02B 7/04 (2021.01); G02B 15/14 (2006.01);
U.S. Cl.
CPC ...
G02B 13/16 (2013.01); G02B 7/04 (2013.01); G02B 15/143103 (2019.08);
Abstract
An image formation optical system includes a first optical system, in which a first refractive system is arranged toward the reduction side of an intermediate image and a second refractive system is arranged toward the magnification side of the intermediate image, and the first refractive system has a first stop, and the second refractive system has a second stop. Lens surfaces are arranged next to and both toward the reduction side and toward the magnification side of the first stop and the second stop, and the following condition is satisfied:1.5<1-1 (unit of mm), where