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:
May. 22, 2018
Filed:
Jun. 22, 2015
Citizen Watch Co., Ltd., Tokyo, JP;
Ayano Tanabe, Tokyo, JP;
CITIZEN WATCH CO., LTD., Tokyo, JP;
Abstract
The phase modulation device () includes a first phase modulation element () which modulates a phase of a light flux in accordance with a voltage applied to each of a plurality of first electrodes in accordance with a first ratio of a second aberration component to a first aberration component of a wave front aberration generated by an optical system including an objective lens (); a second phase modulation element () which modulates a phase of a light flux in accordance with a voltage applied to each of a plurality of second electrodes in accordance with a second ratio of the second aberration component to the first aberration component; and a control circuit () which controls voltages applied to each of first electrodes and each of second electrodes in accordance with a distance from the objective lens to a light focusing position of the light flux.