发明名称 |
Method and apparatus for calibrating iris of photographic printer |
摘要 |
An adjustable iris diaphragm assembly (26) in a zoom lens system (16) of a photographic printer (10) is calibrated for each magnification setting by progressively adjusting the aperture opening until a predetermined light intensity is detected by a sensor (36) near a paper plane of the printer and then determining an output voltage of a feedback sensor (88) of the iris diaphragm assembly. A correlation is established among magnification settings of the printer, iris stop settings, and sensor output voltages to enable the printer to accurately set the iris for a desired exposure.
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申请公布号 |
US5767950(A) |
申请公布日期 |
1998.06.16 |
申请号 |
US19960632204 |
申请日期 |
1996.04.15 |
申请人 |
EASTMAN KODAK COMPANY |
发明人 |
HAWVER, JEFFERY RICHARD;O'BRIEN, MICHAEL JOSEPH;RIVERS, ANDREA S. |
分类号 |
G03B27/72;(IPC1-7):G03B27/72 |
主分类号 |
G03B27/72 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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