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:
Oct. 07, 2025
Filed:
Jun. 16, 2021
Applicant:
Hamamatsu Photonics K.k., Hamamatsu, JP;
Inventors:
Assignee:
HAMAMATSU PHOTONICS K.K., Hamamatsu, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 5/28 (2006.01); G02B 1/11 (2015.01); G02B 21/00 (2006.01);
U.S. Cl.
CPC ...
G02B 5/285 (2013.01); G02B 1/11 (2013.01); G02B 21/0092 (2013.01);
Abstract
An optical apparatus includes an angle filter disposed on an optical path in the middle of focusing or in the middle of divergence by a focusing optical element. The angle filter includes a dielectric multilayer film in which dielectric layers having a first refractive index and dielectric layers having a second refractive index lower than the first refractive index are alternately stacked.