Patent · US Expired

Electrically variable optical filter

US6636357B2 · kind B2 · utility

3Cited by

8References

24Claims

0Family size

Assignee

HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P. · US

Inventors

Mark Robins · Greeley, US
Heather Bean · Fort Collins, US
Matthew Flach · Fort Collins, US

Key dates

Filing date	Jan 30, 2002
Grant date	Oct 21, 2003
Priority date	—
Expiry date	Mar 22, 2022

Classification

Technology area (CPC G)Physics
CPC primaryG01J3/32
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

An electrically variable optical filter includes a first optical element including a first angled face and a second optical element including a second angled face. The second angled face is substantially parallel to and spaced apart from the first angled face. At least one separation actuator is affixed between the first optical element and the second optical element and is operable to change a separation distance D between the first angled face and the second angled face. Light waves transmitted through the first optical element are selectively transmitted through to or reflected away from the second optical element as a function of wavelength and the separation distance D.

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