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:
May. 16, 2006
Filed:
Jan. 20, 2004
Hidefumi Kaneko, Tokyo, JP;
Tetsuya Abe, Hokkaido, JP;
Akihiro Sugiyama, Tochigi, JP;
Atsuo Kabeta, Tochigi, JP;
Hidefumi Kaneko, Tokyo, JP;
Tetsuya Abe, Hokkaido, JP;
Akihiro Sugiyama, Tochigi, JP;
Atsuo Kabeta, Tochigi, JP;
PENTAX Corporation, Tokyo, JP;
Abstract
A superimpose-plate is put on a focusing glass, on which a subject image obtained through the photographing optical system is formed. The superimpose-plate and the focusing glass are provided in an incident opening of a hollow pentagonal mirror. The superimpose-plate comprises a plurality of micro-prisms that are formed on the superimpose-plate. Each of the micro-prisms shows a triangle in a cross-section. The vertical angle of the triangle is identical in each of the micro-prisms. A ridgeline of each of the micro-prisms is parallel to the right-left direction of the picture plane of the view finder.