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:
Sep. 21, 2010
Filed:
May. 22, 2007
Shigeyuki Minami, Musashino, JP;
Toshihide Nozawa, Hachioji, JP;
Shigeyuki Minami, Musashino, JP;
Toshihide Nozawa, Hachioji, JP;
Olympus Imaging Corp., Tokyo, JP;
Abstract
There is disclosed a light projection optical system comprising a light source; a relay lens unit which has a negative lateral magnification and which converts a luminous flux that has diverged from the light source into converged light; and a projection lens unit which reduces a divergent angle of the luminous flux from the relay lens unit to convert a state of the luminous flux into a state close to that of a parallel luminous flux and which projects light toward a target region, wherein the following conditions are satisfied:0.9<βr<3.0   (1); and1.0<(1+β)()<6.0   (2),in which βr is an absolute value of the lateral magnification of the relay lens unit, fr is a focal length of the relay lens unit and fo is a focal length of the projection lens unit.