Patent ID: 9404796
Filing Date: 2016-08-02
CPC Classification: F42B,F42C,G01J,G01S

Claim Text:
1. An optical sensor arrangement, comprising: an aperture; and first and second sensors configured to detect electromagnetic waves passing through the aperture, wherein the first and second sensors are physically arranged in series so that electromagnetic waves passing through the aperture pass through the first sensor and then to the second sensor, wherein the first and second sensors have a same operational spectral region and cover a same region of surroundings to be observed, wherein the first sensor forms an attenuation filter for the second sensor, which is arranged downstream from the first sensor in a direction of the electromagnetic waves passing through the aperture, and wherein the first sensor comprises a first diode and the second sensor comprises a second diode, and wherein the first diode is thicker than the second diode such that a majority of intensity entering the aperture is absorbed by the first sensor, wherein the intensity absorbed by the first diode is on the order of 99%.