Three-dimensional sensing system based on vertical cavity surface transmission laser device array

Abstract

The invention relates to the sensing technology field and discloses a three-dimensional sensing system based on a vertical cavity surface transmission laser device array. The system comprises a signaltransmission sub-module, a signal receiving sub-module, an optical path adjustment module and a data processing module, wherein the signal transmission submodule is used for transmitting a laser signal to a target under the first condition, the signal receiving submodule is used for receiving the laser signal reflected by the target under the second condition, the optical path adjustment module is used for shaping the laser transmitted by the signal transmission sub-module into parallel light which is then transmitted to the target and used for shaping the laser reflected by the target into parallel light which is then transmitted to the signal receiving sub-module, and the data processing module is used for analyzing and processing the laser signal reflected by the target. The system isadvantaged in that both the signal transmission sub-module and the signal receiving sub-module are vertical cavity surface transmission laser device (VCSEL) arrays, the signal transmission sub-moduleand the signal receiving sub-module are integrated on the same motherboard, and the integration degree is relatively high.

Description

technical field [0001] The invention relates to the field of sensing technology, in particular to a three-dimensional sensing system based on a vertical cavity surface emitting laser array. Background technique [0002] Vertical cavity surface emitting laser (Vertical Cavity Surface Emitting Laser, VCSEL) has low threshold current, no catastrophic optical damage (COD), long life, single-mode lasing, fast modulation rate, small divergence angle, high coupling efficiency, It has many advantages such as low price, and it has very significant competitive advantages and market value in the fields of 3D-Sensing (3D-Sensing) and imaging. [0003] In 2017, Lumentum has integrated 940nm VCSEL arrays into the 3D sensing cameras of iPhone 8 and iPhone X to realize the face recognition function, which has led to a research boom in 3D sensing technology. 3D sensing technology mainly uses lasers to emit laser signals to target objects or faces. The target objects or faces will reflect th...

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