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2010-12-01T11:51:31+01:00
2010-10-15T22:39:10+01:00
2010-12-01T11:51:31+01:00
Jouve S.A., EPO - Publication - KB, TaggedPDF v1.27
EP-0578174-A1-19940112
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EP-0578174-A1-19940112
The disclosure relates to a photographic camera using a ccd as the sensor element for photometry. The problem is the limited dynamic range of the photometer. The solution is the adjustment of the dynamic range so that it is appropriate to the photographic situation. This adjustment is achieved by adjusting the integration time for the ccd output. The necessary adjustment is determined by using the photometer itself to determine the light intensity in the most important part of the photographic field. The most important part of the field could be the part used for focus detection. Alternatively, it could be the part in which the light intensity does not exceed a predetermined threshold so that, in cases of subjects with strong backlighting, photometry is based on the subject and not on the backlighting.
The disclosure relates to a photographic camera using a ccd as the sensor element for photometry. The problem is the limited dynamic range of the photometer. The solution is the adjustment of the dynamic range so that it is appropriate to the photographic situation. This adjustment is achieved by adjusting the integration time for the ccd output. The necessary adjustment is determined by using the photometer itself to determine the light intensity in the most important part of the photographic field. The most important part of the field could be the part used for focus detection. Alternatively, it could be the part in which the light intensity does not exceed a predetermined threshold so that, in cases of subjects with strong backlighting, photometry is based on the subject and not on the backlighting.
en
European Patent Office
EP0578174
EP 0578174
G03B 07/099
G03B 07/28
Photometer with adjustable dynamic range for a photographic camera
Photometer with adjustable dynamic range for a photographic camera - European Patent Office - EP 0578174 A1
Photometer with adjustable dynamic range for a photographic camera - European Patent Office - EP 0578174 A1
Adobe PDF Library 8.0
"EP0578174"; "EP 0578174"; "G03B 07/099"; "G03B 07/28"; "Photometer with adjustable dynamic range for a photographic camera"
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15
EP
0578174
A1
1994-01-12
93110727
1993-07-05
JP
17829992
1992-07-06
G03B 07/099
G03B 07/28
NIKON CORPORATION
Iwasaki, Hiroyuki
Grünecker, Kinkeldey,Stockmair & SchwanhäusserAnwaltssozietät
Photometer with adjustable dynamic range for a photographic camera
Photometer mit einem verstellbaren dynamischen Bereich für einen Photoapparat
Photometer with adjustable dynamic range for a photographic camera
Photomètre avec une plage dynamique réglable pour un appareil photo
The disclosure relates to a photographic camera using a ccd as the sensor element for photometry. The problem is the limited dynamic range of the photometer. The solution is the adjustment of the dynamic range so that it is appropriate to the photographic situation. This adjustment is achieved by adjusting the integration time for the ccd output. The necessary adjustment is determined by using the photometer itself to determine the light intensity in the most important part of the photographic field. The most important part of the field could be the part used for focus detection. Alternatively, it could be the part in which the light intensity does not exceed a predetermined threshold so that, in cases of subjects with strong backlighting, photometry is based on the subject and not on the backlighting.
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