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:
Jan. 04, 2011
Filed:
Nov. 11, 2005
Kohtaro Hayashi, Toyonaka, JP;
Shigeru Sawamura, Osakasayama, JP;
Kohtaro Hayashi, Toyonaka, JP;
Shigeru Sawamura, Osakasayama, JP;
Konica Minolta Opto, Inc., Hachioji-shi, JP;
Abstract
The invention provides an optical system for image projection, wherein when used in an image projection apparatus, a screen-continuing portion (e.g., screen-underlying portion) of the apparatus can be reduced to a small size, or can be removed, and thereby the apparatus can be so compacted, and provides an image projection apparatus mounting such optical system. An optical systemfor image projection including a lighting optical systemleading light from a light sourcefor lighting a display element(or'), and a projecting optical systemfor projecting projection light containing image information from the display element(or′). The lighting optical systemis arranged such that a straight optical axis α from the light sourcein the lighting optical systemis positioned in an area deviated from a luminous flux β of the projection light incident into the projecting optical systemtoward an area where the projection light γ from the projecting optical systempasses. The image projection apparatus A (or B or C) mounting such optical system