Invention Grant
- Patent Title: Photometric apparatus
- Patent Title (中): 光度仪
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Application No.: US11331178Application Date: 2006-01-13
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Publication No.: US07692708B2Publication Date: 2010-04-06
- Inventor: Isamu Hirai
- Applicant: Isamu Hirai
- Applicant Address: JP Tokyo
- Assignee: Hoya Corporation
- Current Assignee: Hoya Corporation
- Current Assignee Address: JP Tokyo
- Agency: Greenblum & Bernstein, P.L.C.
- Priority: JP2005-009183 20050117
- Main IPC: H04N5/225
- IPC: H04N5/225

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.
Public/Granted literature
- US20060158530A1 Photometric apparatus Public/Granted day:2006-07-20
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