- 专利标题: Low-height projector assembly
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申请号: US16155833申请日: 2018-10-09
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公开(公告)号: US11131858B2公开(公告)日: 2021-09-28
- 发明人: Tingyu Cheng , Jau-Jan Deng
- 申请人: OmniVision Technologies, Inc.
- 申请人地址: US CA Santa Clara
- 专利权人: OmniVision Technologies, Inc.
- 当前专利权人: OmniVision Technologies, Inc.
- 当前专利权人地址: US CA Santa Clara
- 代理机构: Lathrop GPM LLP
- 主分类号: G02B27/09
- IPC分类号: G02B27/09 ; G02B27/42 ; G06K9/00
摘要:
A low-height projector assembly includes a biconvex lens, a converging lens, an aperture stop, and a beam-steerer between the biconvex lens and the converging lens. The biconvex lens has a principal plane, a focal length, and a first optical axis. The converging lens has a second optical axis laterally offset from the first. The beam-steerer is configured to steer light from the biconvex lens to the converging lens. An aperture-stop plane intersects the second optical axis and the aperture stop. On the second optical axis, at least one of a front surface and a back surface of the converging lens is between the aperture-stop plane and the beam-steerer. The axial chief ray's propagation distance from the principal plane to the aperture stop differs from the focal length by less than half the depth of focus of the biconvex lens.
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