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US 10,120,111 B2Granted
Thin ceramic imaging screen for camera systems
AssigneeGoogle Inc.
InventorsJill D. Berger, Steven M. Swain, Tianran Liang, Kevin Y. Yasumura
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Abstract
An apparatus and a camera system are provided. The apparatus 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.
Claims20
An apparatus comprising:
- 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, wherein:
- the imaging screen comprises a ceramic diffuser layer directly fused into a surface of a glass substrate such that no gap exists between the ceramic diffuser layer and the glass substrate, and
- a thickness of the ceramic diffuser layer is within a range of about 7-10 μm.
2 more elements
A camera system for monitoring micro electro-mechanical system (MEMS) mirrors, the camera system comprising:
- a diffuser comprising a ceramic diffuser layer directly fused into a first surface of a glass substrate such that no gap exists between the ceramic diffuser layer and the 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,
- wherein a thermal expansion coefficient (CTE) of the ceramic diffuser layer has a value within about 8% of a CTE value of the glass substrate.
3 more elements
Dependencies are inferred from the claim text.