发明名称 |
Iris drive mechanism |
摘要 |
An iris drive mechanism has two slidable diaphragms which are operatively connected with a motor through a lever arrangement which, for a given motor output shaft rotational speed moves the diaphragms slowly at their extreme positions wherein the aperture is small and large respectively, and more quickly at an intermediate stage. The slower movement when the aperture is small improves the F number resolution.
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申请公布号 |
US5315889(A) |
申请公布日期 |
1994.05.31 |
申请号 |
US19920900276 |
申请日期 |
1992.06.18 |
申请人 |
SONY CORPORATION |
发明人 |
MORO, SHUUJI;TADA, KANEHIRO;NISHIDA, YASUO;OHSHIMA, EIJI |
分类号 |
G03B9/02;G03B9/06;(IPC1-7):F16H21/44 |
主分类号 |
G03B9/02 |
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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