Invention Grant
- Patent Title: Photometric device with accumulation control
- Patent Title (中): 具有积累控制的光度测量装置
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Application No.: US13067647Application Date: 2011-06-16
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Publication No.: US08670044B2Publication Date: 2014-03-11
- Inventor: Hiroshi Takeuchi
- Applicant: Hiroshi Takeuchi
- Applicant Address: JP Tokyo
- Assignee: Nikon Corporation
- Current Assignee: Nikon Corporation
- Current Assignee Address: JP Tokyo
- Agency: Oliff PLC
- Priority: JP2007-193547 20070725
- Main IPC: H04N5/235
- IPC: H04N5/235 ; H04N3/14 ; H04N5/335
Abstract:
A photometric device includes a storage-type photometric sensor, a first control means that performs accumulation control on the photometric sensor based upon an average value of an output of the photometric sensor, a second control means that performs accumulation control on the photometric sensor based upon a maximum value of the output of the photometric sensor, and an accumulation control means that controls the second control means to perform next accumulation control, if the maximum value of the output of the photometric sensor on which the accumulation control is performed by the first control means exceeds a saturation output level of the photometric sensor, and controls the first control means to perform next accumulation control, if the maximum value of the output of the photometric sensor does not exceed the saturation output level of the photometric sensor.
Public/Granted literature
- US20110242365A1 Photometric device Public/Granted day:2011-10-06
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