发明名称 |
Gas zoom lens |
摘要 |
A multi-element lens is provided having a central cavity containing a heavy, high index gas. The central cavity is defined by a pair of meniscus elements and acts as a thick positive lens. The pressure of the gas in the cavity is varied in response to magnification changes desired, the pressure change causing a change in the refractive index of the gas thereby altering the focal length of the lens.
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申请公布号 |
US4331388(A) |
申请公布日期 |
1982.05.25 |
申请号 |
US19800124182 |
申请日期 |
1980.02.25 |
申请人 |
XEROX CORPORATION |
发明人 |
MCCROBIE, GEORGE L.;REES, JAMES D.;DONNEL, ROSCOE J. |
分类号 |
G02B13/24;G02B3/12;G02B3/14;G02B15/00;(IPC1-7):G02B1/06 |
主分类号 |
G02B13/24 |
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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