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:
Nov. 03, 2015
Filed:
Dec. 17, 2013
Naohito Sasaki, Tokyo, JP;
Isamu Hirai, Tokyo, JP;
Naohito Sasaki, Tokyo, JP;
Isamu Hirai, Tokyo, JP;
RICOH IMAGING COMPANY, LTD., Tokyo, JP;
Abstract
An optical device for forming an image of an object, comprising: a semitransparent mirror surface disposed on an optical path of the image of the object; and a light projection unit configured to project light to the semitransparent mirror surface and thereby to combine, on the optical path, the projected light transmitting through the semitransparent mirror surface with the image of the object reflecting from the semitransparent mirror surface, wherein: a first wavelength region is defined in a visible light region to include a wavelength of the projected light; the semitransparent mirror surface has a substantially flat reflectance property within a second wavelength region which is defined in the visible light region not to include the first wavelength region; and transmissivity of the semitransparent mirror surface at the wavelength of the projected light is higher by 10% to 50% than transmissivity in the second wavelength region.