Rotary scanning laser radar imaging device

A technology of laser radar imaging and rotational scanning, which is applied in measuring devices, instruments, and re-radiation, etc., to reduce the difficulty of assembly and adjustment and save manufacturing costs.
CN109901191AActive Publication Date: 2019-06-18SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Applications(China)
Current Assignee / Owner
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
Publication Date
2019-06-18

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Abstract

The invention relates to a rotary scanning laser radar imaging device. The device includes a speckle illumination system, a line array detection system, and a mechanical rotary table system carrying the speckle illumination system and the line array detection system, the mechanical rotary table system can achieve 360 DEG horizontal rotation, the optical axis of the speckle illumination system is parallel to the optical axis of the line array detection system, the optical axis of the speckle illumination system and the optical axis of the line array detection system are both perpendicular to the rotation axis of the mechanical rotary table system. The device is advantaged in that detection of the target information is performed based on the random code measurement principle, the number of detection units of a line array detector no longer directly limits the resolution, higher resolution radar imaging can be achieved with a smaller pixel number of line array detectors, the cost of acquiring high-resolution 3D imaging is reduced, and a new technical solution is provided for an automotive laser radar.
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Description

technical field

[0001] The invention relates to a laser radar imaging device, in particular to a rotary scanning laser radar device based on speckle illumination and horizontal line array detection. Background technique

[0002] Lidar based on time-of-flight (TOF) measurement can efficiently and stably acquire three-dimensional spatial information of long-distance targets, and is considered an indispensable detection method for ADAS systems above L4. The traditional mechanical scanning laser radar consists of multiple Laser-APD transceiver pairs arranged vertically to form a multi-line structure, which is mounted on a rotating motor to detect the surrounding 360ยฐ environment. At present, Velodyne's latest generation 128-line lidar product VLS-128 has been able to achieve superior imaging with a vertical resolution of up to 0.1ยฐ within a vertical 40ยฐ observation field of view. All-solid-state or hybrid solid-state (hereinafter collectively referred to as solid-state) lidar i...

Claims

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