发明名称 |
Varifocal optical element |
摘要 |
An optical element whose focal length is variable comprises a medium whose refractive index is variable by temperature, a heating device for imparting heat to the medium to cause an index gradient resulting from a temperature distribution to be created in the medium, and a device for controlling the amount of heat imparted to the medium by the heating device to vary the shape of the index gradient formed in the medium.
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申请公布号 |
US4872743(A) |
申请公布日期 |
1989.10.10 |
申请号 |
US19880144643 |
申请日期 |
1988.01.11 |
申请人 |
CANON KABUSHIKI KAISHA |
发明人 |
BABA, TAKESHI;MATSUOKA, KAZUHIKO;USUI, MASAYUKI;MINOURA, KAZUO;SOMEYA, ATSUSHI;SUZUKI, MASAYUKI |
分类号 |
G02B3/14;G02F1/01;G02F1/29;G06K15/02;G06K15/12;G11B7/09;G11B7/135;H04N1/028;H04N5/225 |
主分类号 |
G02B3/14 |
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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