Time-of-flight depth camera

Abstract

The invention provides a time-of-flight depth camera, which includes a transmitting module used for transmitting a light beam, a collecting module used for collecting a reflected light beam, and a processing circuit connected with the transmitting module and the collecting module and used for calculating the time of flight between the transmitted light beam and the reflected light beam. The transmitting module includes a light source, a time light modulator and a space light modulator. The time light modulator is used for making the light source emit corresponding carrier beams with one time carrier signal. The space light modulator is used for modulating the carrier beams spatially to form non-flooding carrier beams and emitting the non-flooding carrier beams outward. The collecting module includes an array pixel unit and a lens unit. The lens unit is used for receiving and imaging at least part of the non-flooding carrier beams reflected by an object on at least part of the array pixel unit. Non-flooding carrier beams are formed through modulation of the light source by the time light modulator and the space light modulator, so as to enhance the anti-interference ability of the time-of-flight depth camera to ambient light and reduce power consumption.

Description

technical field [0001] The invention belongs to the technical field of computers, and more specifically relates to a time-of-flight depth camera. Background technique [0002] Time of flight (TOF) depth camera calculates the distance of an object by measuring the flight time of the beam in space. Due to its high precision and large measurement range, it is widely used in consumer electronics, unmanned vehicles, and AR. / VR and other fields. [0003] The traditional time-of-flight depth camera system includes a light source and a camera. The light source emits a flood light beam to the target space to provide illumination, and the camera images the reflected flood light beam. time to calculate the distance of the object. When using the time-of-flight depth camera for distance sensing, ambient light interference will affect the accuracy of the measurement. measurement error. [0004] In the existing technology, background light can be suppressed by adding optical methods s...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem of lacking a time-of-flight depth-of-flight camera with good anti-environmental light performance in the prior art, the present invention provides a time-of-flight depth-of-flight camera

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