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:
Oct. 11, 2011
Filed:
Feb. 15, 2008
Seiji Shimokawa, Kanagawa, JP;
Tatsuya Nagahama, Kanagawa, JP;
Seiji Shimokawa, Kanagawa, JP;
Tatsuya Nagahama, Kanagawa, JP;
Mitutoyo Corporation, Kanagawa, JP;
Abstract
A light source () is fixed at a position and emits light in a direction away from an optical axis (A) of an objective lens. An outer reflecting mirror (an optical member) () and an inner reflecting mirror (an optical member) () are provided as a unit so that relative positions thereof are fixed. A reflecting mirror unit () can be moved in directions along the optical axis (A), i.e. up and down relative to the light source (). A free-form curved surface portion () of the outer reflecting mirror () and a reflecting surface of the inner reflecting mirror () reflect light in different directions depending on a position of the light incident thereon.