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Light detection and ranging system with solid state spectral scanning

A technology for optical detection and ranging equipment, which is applied in radio wave measurement systems, measurement devices, and electromagnetic wave re-radiation, etc., and can solve problems such as reducing coupling efficiency and weak signal detection.

Pending Publication Date: 2022-07-08
AEVA INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This slight angular change causes a walk-off of the signal of interest at the fiber tip, reducing the coupling efficiency, which manifests itself as weaker signal detection
This degradation becomes more severe as the fiber diameter decreases, e.g. single-mode fiber with a diameter of ~10 μm, or as the angular velocity of the mirror increases

Method used

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  • Light detection and ranging system with solid state spectral scanning
  • Light detection and ranging system with solid state spectral scanning
  • Light detection and ranging system with solid state spectral scanning

Examples

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Embodiment Construction

[0021] Example implementations of the present disclosure relate to an improved scanning LIDAR system. Example implementations of the present disclosure are based on a type of LIDAR that uses frequency modulation (FM) and coherent detection to overcome the shortcomings of conventional LIDAR systems and the limitations of existing FM LIDAR systems. Historically, FM LIDAR systems have suffered significant losses in the return path of the beam; thus, such systems, which are typically quite bulky, require higher average beam output powers to measure distances comparable to time-of-flight (TOF) LIDAR systems. However, the range is limited by the operating distance for eye-safe output power.

[0022] Example implementations of the present disclosure are configured to measure range and speed simultaneously using coherent detection, with the added benefit of immunity to crosstalk from other LIDAR systems. Other implementations can be used with non-coherent systems to improve range, fr...

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PUM

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Abstract

A light detection and ranging (LIDAR) device is provided, comprising: a light source for emitting a first light beam having a first frequency and a second light beam having a second frequency; and a dispersion element for deflecting the first light beam having the first frequency at a first angle and deflecting the second light beam having the second frequency at a second angle.

Description

[0001] Related applications [0002] This application claims the benefit of US Patent Application No. 16 / 449,189, filed June 21, 2019, under 35 U.S.C. § 119(e), the entire contents of which are incorporated herein by reference. technical field [0003] The present disclosure generally relates to Light Detection and Ranging (LIDAR) that provides simultaneous measurements of range and velocity across two dimensions. Background technique [0004] The fast scanning mirror is the main component used to illuminate the scene in most conventional LIDAR systems. One mirror typically scans rapidly in the X direction (azimuth), while the other mirror scans slowly in the Y direction (elevation). The detection of light emission and reflection from the target is usually done coaxially via a single mode fiber. The collected light has measured delays or altered frequency characteristics used to extract range and potential velocity information. When point-by-point detected range informati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S17/08G01S7/481
CPCG01S17/08G01S7/4817G01S17/89G01S17/42G01S7/4814G01S7/4816G01S7/4911
Inventor M·雷兹克O·P·科考格鲁O·艾维斯尼尔·N·奥扎K·加涅B·贝扎迪
Owner AEVA INC