Beam direction sensor

摘要

A direction sensor (200) includes sensor cells (215) that respectively correspond to different directions. Each of the sensor cells (215) includes a light sensor (130, 140) and a grating (120) that couples incident light into the light sensor (130, 140) when the incident light has a specific wavelength and is incident on the grating (120) along the direction corresponding to the sensor cell (215).

主权项

1. A direction sensor comprising:
a plurality of sensor cells, wherein each of the sensor cells comprises: a light sensor; and a grating tuned to couple incident light having a first wavelength into the light sensor more strongly when the incident light is incident on the grating at the direction corresponding to the sensor cell than when the incident light is incident on the grating at the different directions corresponding to others of the sensor cells, wherein the grating of each sensor cell of the plurality of sensor cells has a grating pattern tuned to a direction of incident light different than a grating pattern of the grating of other sensor cells of the plurality of sensor cells, the grating pattern of each sensor cell being tuned by having a different two-dimensional grating pattern than the grating pattern of each other sensor cell of the plurality of sensor cells.