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:
Apr. 19, 2021
Hamamatsu Photonics K.k., Hamamatsu, JP;
Haruyasu Ito, Hamamatsu, JP;
HAMAMATSU PHOTONICS K.K., Hamamatsu, JP;
Abstract
An attenuator device includes: a first window pair including a pair of first windows having a pair of first surfaces extending to form a Brewster's angle with an optical axis; a rotation holding portion which holds the first window pair to be rotatable around the optical axis; a second window pair including a pair of second windows having a pair of second surfaces extending to form a Brewster's angle with the optical axis; and a λ/4 phase element which gives a phase difference of λ/4 between a polarized component parallel to an optical axis and a polarized component orthogonal to the optical axis when a wavelength of laser light is λ. The second window pair is disposed so that a vibration direction of a P-polarized component transmitted through the second window pair is inclined with respect to the optical axis of the λ/4 phase element by 45°.