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:
Jun. 15, 2004
Filed:
Oct. 31, 2002
Applicant:
Inventor:
Noah C. Lassar, San Diego, CA (US);
Assignee:
Hewlett-Packard Development Company, L.P., Houston, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02F 1/09 ; G02F 1/03 ; G02F 1/29 ; G02B 2/600 ; G01N 1/106 ;
U.S. Cl.
CPC ...
G02F 1/09 ; G02F 1/03 ; G02F 1/29 ; G02B 2/600 ; G01N 1/106 ;
Abstract
An optical system includes a layer of magneto rheological (MR) fluid having a surface exposed to air or vacuum. The MR fluid has a first state wherein the surface is reflective, and a second state wherein the surface is non-reflective. A magnetic actuator selectively applies a magnetic field to the MR fluid to actuate the fluid to the second state.