发明授权
- 专利标题： Variable focal length lens
- 专利标题（中）： 可变焦距镜头
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申请号： US863833申请日： 1986-05-16
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公开(公告)号： US4758070A公开(公告)日： 1988-07-19
- 发明人: Yoshifumi Nishimoto
- 申请人： Yoshifumi Nishimoto
- 申请人地址： JPX Tokyo
- 专利权人： Canon Kabushiki Kaisha
- 当前专利权人： Canon Kabushiki Kaisha
- 当前专利权人地址： JPX Tokyo
- 优先权： JPX60-119434 19850531
- 主分类号： G02F1/03
- IPC分类号： G02F1/03 ; G02F1/29
摘要：
A variable focal length lens has a lens system having optical anisotropy, a polarization plane control device for changing the direction of polarization of a light beam on the lens system. A detector is provided for detecting the direction of polarization of the light beam emergent from the lens or the polarization plane control device which, by a signal, controls the polarization plane control device so that only a light beam of desired direction of polarization emerges from the lens.
公开/授权文献
- US5787092A Test chip circuit for on-chip timing characterization 公开/授权日：1998-07-28
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