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Method and lidar device for scanning scanning region using beams with adjusted wavelength

A technology of laser radar and scanning area, which is applied in the direction of re-radiation, electromagnetic wave re-radiation, optics, etc., can solve the problem of negative influence of signal-to-noise ratio, and achieve the effect of simplifying analysis and processing

Pending Publication Date: 2020-01-07
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Here, filters with a wider transmission wavelength range can have a negative impact on the signal-to-noise ratio

Method used

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  • Method and lidar device for scanning scanning region using beams with adjusted wavelength
  • Method and lidar device for scanning scanning region using beams with adjusted wavelength
  • Method and lidar device for scanning scanning region using beams with adjusted wavelength

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Embodiment Construction

[0024] figure 1 A schematic diagram showing a transmission path of the laser radar device 1 according to the first embodiment. According to this exemplary embodiment, lidar device 1 has two beam sources 2 , 4 embodied as infrared lasers 2 . The first beam source 2 is arranged in such a way that it emits a generated beam 3 which extends along the optical axis of the transmission path A. FIG. Here, the optical axis A of the transmission path coincides with the optical axis of the generating optics 6 . The second beam source 4 is spaced apart from the first beam source 2 . The beam 5 generated by the second beam source 4 therefore runs parallel to the optical axis A and is likewise spaced apart from the optical axis A. According to this exemplary embodiment, the wavelength of the beam 5 generated by the second beam source 4 is smaller than the wavelength of the beam 3 generated by the first beam source 2 . The generated beams 3 , 5 are then shaped by the generating optics 6 ....

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PUM

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Abstract

The invention relates to a LIDAR device for scanning a scanning region with at least two beams, comprising at least two beam sources for generating at least two beams, comprising a generation optics system for shaping the at least one generated beam, comprising a receiver unit for receiving and evaluating at least one beam reflected on an object, and comprising an optical bandpass filter for absorbing interfering reflections, wherein each beam source generates at least one beam having a wavelength that can be adjusted according to an emission angle of the at least one beam. The invention alsorelates to a method for scanning a scanning region.

Description

technical field [0001] The invention relates to a lidar device for scanning a scanning area with at least two beams, and also relates to a method for scanning a scanning area with at least two beams. Background technique [0002] Common laser radar (English Light detection and ranging, light detection and ranging) equipment consists of a sending device and a receiving device. The transmitting device generates and emits a continuous electromagnetic beam or a pulsed electromagnetic beam. When these beams impinge on a movable or stationary object, the beams are reflected by the object in the direction of the receiving device. The receiving device can detect the reflected electromagnetic radiation and assign a reception time to the reflected radiation. This can be used, for example, in the context of a “time-of-flight” analysis to determine the distance of an object from the LiDAR device. In order to improve the signal-to-noise ratio, an optical bandpass filter, in particular...

Claims

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Application Information

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IPC IPC(8): G01S17/42G01S17/89G01S7/481G01S7/487
CPCG01S17/42G01S7/4815G01S7/4816G02B27/4233G02B26/106G02B26/127G02B27/0037G02B27/4244
Inventor S·博加特舍尔H-J·施瓦茨N·霍伊斯纳S·施皮斯贝格尔
Owner ROBERT BOSCH GMBH