Apparatus and method for a light direction sensor

Optics: measuring and testing – Angle measuring or angular axial alignment – Star/sun/satellite position indication with photodetection

Reexamination Certificate

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Reexamination Certificate

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07924415

ABSTRACT:
The present invention provides a light direction sensor for determining the direction of a light source. The system includes an image sensor; a spacer attached to the image sensor, and a pattern mask attached to said spacer. The pattern mask has a slit pattern that as light passes through the slit pattern it casts a diffraction pattern onto the image sensor. The method operates by receiving a beam of light onto a patterned mask, wherein the patterned mask as a plurality of a slit segments. Then, diffusing the beam of light onto an image sensor and determining the direction of the light source.

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patent: 2009/0297058 (2009-12-01), Hoctor et al.

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