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:
Apr. 06, 2010
Filed:
Jan. 13, 2006
Isamu Hirai, Tokyo, JP;
Isamu Hirai, Tokyo, JP;
Hoya Corporation, Tokyo, JP;
Abstract
A photometric apparatus having at least two photo-receivers, includes a single incidence optical system, wherein a light bundle carrying an object image which is passed through a focusing screen and exits out of an image-erecting system is incident on the single incidence optical system; a beam splitting optical system which splits the incident light bundle, that is incident on the single incidence optical system, into at least two light bundles by making a part of the incident light bundle pass through the beam splitting optical system and making another part of the incident light reflect from the beam splitting optical system; and at least one photometering optical system which makes the two parts of the light incident on the two photo-receivers, respectively.