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:
Aug. 12, 2008
Filed:
Oct. 08, 2004
Applicants:
David A. Waldman, Concord, MA (US);
Joby Joseph, New Delhi, IN;
Inventors:
David A. Waldman, Concord, MA (US);
Joby Joseph, New Delhi, IN;
Assignee:
STX Aprilis, Inc., Maynard, MA (US);
Primary Examiner:
Int. Cl.
CPC ...
G03H 1/16 (2006.01); G03H 1/12 (2006.01); G11B 7/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
An apparatus for writing and reading holograms, comprising a spatial light modulator (SLM) operable in phase mode, having a plurality of pixels for generating an object beam that overlaps with a reference beam; a holographic recording medium (HRM) in the path of the object beam; and a first lens element disposed in the path of the object beam between the SLM and the HRM; wherein the HRM is disposed at or near the Fourier transform plane of the first lens element.