Patent Number: 9,743,076

Title: Optical systems with compact back focal lengths

Abstract: Optical systems, such as 2-D and 3-D projection systems, may be configured to have a compact back focal length to allow for more compact projection lenses, lower throw ratios, improved contrast, or any combination thereof. In an embodiment, an optical system may include a relay element configured to form an intermediate image having a focal point proximate to a projection lens.

Inventors: Schuck; Miller H. (Erie, CO)

Assignee: RealD Inc.

International Classification: H04N 13/04 (20060101); G02B 17/08 (20060101); G02B 13/00 (20060101); G02B 27/00 (20060101); G02B 26/00 (20060101); G02B 27/26 (20060101); G02B 13/16 (20060101); H04N 9/31 (20060101); G02F 1/01 (20060101); G02B 27/28 (20060101)

Expiration Date: 2021-08-22 0:00:00