发明名称 |
Light-emitting device for automatic focus adjustment apparatus |
摘要 |
In an automatic focus adjustment apparatus with a light-emitting device comprising a condenser lens and a light-emitting element which radiates light onto an object and adjusts the focal point according to a light reflected back from the object, undesired flare is eliminated by placing a diaphragm sufficiently close to the light-emitting element so that only the effective light from the element passes to the condenser lens by using a cap, an opaque paint or a spatial filter, and/or by applying a low reflectance paint to the inner wall of an outer casing of the light-emitting device.
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申请公布号 |
US4758764(A) |
申请公布日期 |
1988.07.19 |
申请号 |
US19860870119 |
申请日期 |
1986.06.03 |
申请人 |
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. |
发明人 |
KUGA, RYUICHIRO;HIRAO, YOSHIAKI;ASAKURA, HIROYUKI;NAGAOKA, YOSHITOMI |
分类号 |
H01L33/58;(IPC1-7):H01L33/00 |
主分类号 |
H01L33/58 |
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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