Patent ID: 9733122
Date: 2017-08-15
CPC Classifications: G01J,G01S,G01V,G02B

Claim:
1. A photosensor unit configured to emit irradiation light to an outside of a unit case from a plurality of light emitting elements housed in the unit case, and to detect reflected light from the outside of the unit case with a light receiving element in the unit case, the photosensor unit comprising: a photosensor lens fixed to an opening of the unit case and configured to condense the irradiation light from the plurality of light emitting elements in a detection region outside the unit case, and to condense the reflected light from the detection region at the light receiving element in the unit case; a single convex lens surface formed on one side of the photosensor lens; a light-receiving convex lens surface sharing an optical axis with the single convex lens surface, and a plurality of light-emitting convex lens surfaces integrally formed on an opposite side of the photosensor lens; wherein each of the plurality of light-emitting convex lens surfaces has an optical axis in parallel with the optical axis of the light-receiving convex lens surface and is disposed on a circle centered at the light-receiving convex lens surface; and the light receiving element is disposed at a rear focal point position of the light-receiving convex lens surface, and each of the plurality of light emitting elements is disposed at a respective front focal point position of each of the plurality of light-emitting convex lens surfaces.