Patent · US Active

Dual transducer photoelastic modulator

US11054672B2 · kind B2 · utility

0Cited by

3References

25Claims

0Family size

Assignee

Hinds Instruments, Inc. · US

Inventors

John Freudenthal · Hillsboro, US
Baoliang Wang · Shanghai, CN

Key dates

Filing date	Nov 30, 2018
Grant date	Jul 6, 2021
Priority date	—
Expiry date	Feb 19, 2039

Classification

Technology area (CPC G)Physics
CPC primaryG02F1/0123
WIPO fieldOptics
WIPO sectorInstruments

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 f1 and f2. Methods of manufacture and operation are also disclosed.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.