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. 12, 2023
Filed:
Dec. 07, 2020
Applicant:
Gigaphoton Inc., Tochigi, JP;
Inventors:
Yosuke Watanabe, Oyama, JP;
Masato Moriya, Oyama, JP;
Assignee:
Gigaphoton Inc., Tochigi, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01J 1/04 (2006.01); G01J 1/42 (2006.01); G02B 27/28 (2006.01); H01S 3/00 (2006.01); H01S 3/225 (2006.01);
U.S. Cl.
CPC ...
G01J 1/0414 (2013.01); G01J 1/0429 (2013.01); G01J 1/4257 (2013.01); G02B 27/283 (2013.01); H01S 3/0014 (2013.01); H01S 3/225 (2013.01);
Abstract
An energy measuring apparatus according to one aspect of the present disclosure includes a first beam splitter, a second beam splitter, a third beam splitter, and a fourth beam splitter, which sequentially reflect part of a main beam and input the beam to an energy sensor. The first beam splitter, the second beam splitter, the third beam splitter, and the fourth beam splitter are each arranged to have such an incident angle and a folding direction of an optical path as to suppress a change in detection value of the energy sensor due to a change in incident angle and a change in polarization purity of the main beam.