Patent ID: 9733343
Date: 2017-08-15
CPC Classifications: G01S,G01V,H03K

Claim:
1. A proximity sensor arrangement, comprising an optical barrier being placed between a light emitting device and a photo-detector, wherein the light emitting device, the photo-detector and the optical barrier are covered by a cover; the optical barrier is configured to block light emitted from the light emitting device to the photo-detector and reflected by the cover by means of specular reflection; the optical barrier is configured to pass the light emitted from the light emitting device to the photo-detector via the cover and scattered on or above a first surface of the cover facing away from the light emitting device and the photo-detector, and the optical barrier is configured narrow enough to frustrate specular reflection paths from the light emitting device to the photo-detector via the cover surfaces, while permitting rays to pass around the barrier by indirect or diffusely scattered paths via diffusive scattering on or above the first surface of the cover.