Optical sensing device and structured light projector

Abstract

An optical sensing device is provided. The optical sensing device includes a structured light projector and a sensor. The structured light projector is configured to project a structured light to the object. The structured light projector includes a light source, a diffractive optical element, and a liquid crystal lens module. The light source is configured to emit a light beam. The diffractive optical element is disposed on a path of the light beam and configured to generate diffraction patterns so as to form the structured light. The liquid crystal lens module is disposed on at least one of the path of the light beam and a path of the structured light and capable of controlling between at least two focusing state. The sensor is disposed adjacent to the structured light projector and configured to sense a reflected structured light from the object. Besides, a structured light projector is also provided.

Dependencies are inferred from the claim text.