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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.:

US 11300924 B1

PDFFull Text
Date of Patent:
Apr. 12, 2022

Filed:

Mar. 02, 2017

Illumination device

Applicant:

Seereal Technologies S.a., Munsbach, LU;

Inventor:

Gerald Futterer, Metten Bayern, DE;

Assignee:

SEEREAL TECHNOLOGIES S.A., Munsbach, LU;

Attorney:

Saul Ewing Arnstein & Lehr LLP

Primary Examiner:

Stephone B Allen

Assistant Examiner:

Jyotsna V Dabbi

Int. Cl.
CPC ...
G03H 1/00 (2006.01); G03H 1/22 (2006.01); G02B 5/02 (2006.01); G02B 27/09 (2006.01); G03H 1/32 (2006.01); G02B 5/32 (2006.01); G03H 1/04 (2006.01); G03H 1/02 (2006.01); G02B 26/06 (2006.01); G02B 3/00 (2006.01); G02B 27/48 (2006.01); G02B 19/00 (2006.01);
U.S. Cl.
CPC ...
G03H 1/2294 (2013.01); G02B 5/0252 (2013.01); G02B 5/0257 (2013.01); G02B 5/32 (2013.01); G02B 27/0927 (2013.01); G02B 27/0944 (2013.01); G03H 1/0402 (2013.01); G03H 1/2286 (2013.01); G03H 1/32 (2013.01); G02B 3/0043 (2013.01); G02B 19/0047 (2013.01); G02B 26/06 (2013.01); G02B 27/0988 (2013.01); G02B 27/48 (2013.01); G03H 2001/0212 (2013.01); G03H 2001/0423 (2013.01); G03H 2222/18 (2013.01); G03H 2222/22 (2013.01); G03H 2222/24 (2013.01); G03H 2222/33 (2013.01); G03H 2222/35 (2013.01); G03H 2223/14 (2013.01); G03H 2223/16 (2013.01); G03H 2223/23 (2013.01); G03H 2225/33 (2013.01);
Abstract

An illumination device for illuminating a spatial light modulator device. Sub-holograms are used for encoding a hologram into the spatial light modulator device. The Illumination device includes at least one light source for emitting light for illuminating the spatial light modulator device and a beam shaping unit. The beam shaping unit provides a flat-top plateau-type distribution of an absolute value of a complex degree of mutual coherence of the light in a plane of the spatial light modulator device to be illuminated. The flat-top plateau-type distribution of the absolute value of the complex degree of mutual coherence has a shape that is at least similar to a shape of the largest sub-hologram used for encoding of object points into the spatial light modulator device.

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