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    THIN CERAMIC IMAGING SCREEN FOR CAMERA SYSTEMS
    5.
    发明公开
    THIN CERAMIC IMAGING SCREEN FOR CAMERA SYSTEMS 审中-公开

    公开(公告)号：EP3336589A1

    公开(公告)日：2018-06-20

    申请号：EP17199276.1

    申请日：2017-10-30

    申请人： Google LLC

    发明人： BERGER, Jill D. ,  SWAIN, Steven M. ,  LIANG, Tianran ,  YASUMURA, Kevin Y.

    IPC分类号： G02B5/02 ,  C03C17/00 ,  G02B6/35

    CPC分类号： G02B5/0268 ,  C03C17/007 ,  C03C2217/452 ,  C03C2217/485 ,  G02B5/0242 ,  G02B5/0278 ,  G02B6/3512 ,  G02B6/3556 ,  G02B6/356 ,  G02B6/359 ,  H04N5/2252 ,  H04N5/374

    摘要： An apparatus is provided, which includes an imaging screen configured to diffuse incoming light, and a lens system coupled to the imaging screen and configured to focus light from the imaging screen onto a CMOS image sensor. The imaging screen includes a ceramic diffuser layer fused into a surface of a glass substrate, and a thickness of the ceramic diffuser layer is within a range of about 7-10 µm.

    A camera system for monitoring micro electro-mechanical system (MEMS) mirrors is provided. The camera system includes a diffuser comprising a ceramic diffuser layer fused into a first surface of a glass substrate, an optical block configured to concentrate light emitted by the diffuser, an image sensor configured to receive concentrated light from the optical block and to generate electrical signals, and a processor coupled to the image sensor and configured to produce an image of beams reflected from the MEMS mirrors based on the electrical signals. A thermal expansion coefficient (CTE) of the ceramic diffuser layer has a value within about 8% of a CTE value of the glass substrate.