OPTICAL SENSOR WITH NARROW ANGULAR RESPONSE

摘要

The present invention relates to an optical sensor that is formed in an integrated circuit based on CMOS technology and that comprises: one or more photocells including one or more photodetector active areas and an optical stack formed on the photodetector active area(s); and light shielding means, that are formed in or on the optical stack, and are configured, for each photocell, to define an angular range around a given incident direction with respect to said photocell, block incident light with incidence angle outside the defined angular range, and allow incident light with incidence angle within the defined angular range to propagate through the optical stack down to a respective photodetector active area; whereby the light shielding means limit angular response of the optical sensor.

主权项

1. An optical sensor, that is formed in an integrated circuit based on CMOS technology and that comprises:
one or more photocells including
one or more photodetector active areas, andan optical stack formed on the photodetector active area(s); and light shielding means, that are formed in or on the optical stack, and are configured, for each photocell, to
define an angular range around a given incident direction with respect to said photocell,block incident light with incidence angle outside the defined angular range, andallow incident light with incidence angle within the defined angular range to propagate through the optical stack down to a respective photodetector active area; whereby the light shielding means limit angular response of the optical sensor.