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. 06, 2021
Filed:
Nov. 30, 2018
Applicant:
Hinds Instruments, Inc., Hillsboro, OR (US);
Inventors:
John Freudenthal, Portland, OR (US);
Baoliang Wang, Portland, OR (US);
Assignee:
Hinds Instruments, Inc., Hillsboro, OR (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02F 1/03 (2006.01); G02F 1/07 (2006.01); G02F 1/01 (2006.01);
U.S. Cl.
CPC ...
G02F 1/0131 (2013.01); G02F 1/0123 (2013.01);
Abstract
An apparatus includes a photoelastic modulator (PEM) optical element including a first driving axis and a second driving axis arranged at a selected angle with respect to each other and perpendicular to an optical axis, wherein the first driving axis and the second driving axis extend respective predetermined non-equal lengths that correspond to respective predetermined non-equal natural first and second PEM frequencies fand f. Methods of manufacture and operation are also disclosed.