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:
Jun. 25, 2013
Filed:
May. 04, 2010
Norihisa Sakagami, Osaka, JP;
Takahiro Fujioka, Osaka, JP;
Kouei Hatade, Osaka, JP;
Nalux Co., Ltd., Osaka, JP;
Abstract
An imaging optical system includes three reflecting mirrors having first to third reflection surfaces and is configured, such that in an XYZ orthogonal coordinate system using an optical axis at the center of the field of view as Z-axis, the optical axis at the center of the field of view and an optical axis of an image plane are in parallel to each other Assuming that along the path of the beam traveling along the optical axis at the center of the field of view a distance between the second reflection surface and the third reflection surface is L, a distance between the third reflection surface and the image plane is Land fy1 and an equivalent F-number of the imaging optical system is represented as Fno, the relational expression 0.5<Fno(L/L)<1.3 is satisfied.