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Device for suppressing speckle effect by using partial-wave surface shifting in triangular ranging linear focal imaging

A technology of triangular distance measurement and line focus, which is applied in the direction of measuring device, measuring distance, and utilizing re-radiation, etc., can solve the problems of narrow application range and no application prospect, and achieve the reduction of measurement uncertainty, error reduction, and wide application scene effect

Inactive Publication Date: 2019-02-26
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

However, excessively extending the length of the focal spot of the line will limit the surface shape of the measured object, resulting in a narrow application range of the device, which does not have a good application prospect

Method used

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  • Device for suppressing speckle effect by using partial-wave surface shifting in triangular ranging linear focal imaging
  • Device for suppressing speckle effect by using partial-wave surface shifting in triangular ranging linear focal imaging
  • Device for suppressing speckle effect by using partial-wave surface shifting in triangular ranging linear focal imaging

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Embodiment Construction

[0026] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.

[0027] Such as figure 1 As shown, a device for suppressing speckle effect by using sub-wavefront image shifting in triangular ranging line-focus imaging is characterized in that the device includes a transmitting unit and a receiving unit, wherein:

[0028] The emitting unit includes a laser 1, a focusing lens group 2 and a cylindrical lens 7 arranged in sequence from top to bottom, the measure...

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Abstract

The invention belongs to the field of laser range finding, and discloses a device for suppressing a speckle effect by using partial-wave surface shifting in triangular ranging point linear imaging. The device comprises a transmitting unit and a receiving unit, wherein the transmitting unit comprises a laser, a focusing lens group and a cylindrical lens. A measured object is disposed below the cylindrical lens. A one-dimensional glass sheet array and a receiving lens group in the receiving unit are disposed between a photoelectric image detector and the measured object, and the scattered lightemitted by the measured object is shifted by a partial-wave surface of the one-dimensional glass sheet array to form a plurality of linear focal spot images which are received by the photoelectric image detector. The one-dimensional glass sheet array is disposed between the photoelectric image detector and the measured object, so the device can perform the shifting of the scattered light emitted by the measured object to form the plurality of linear focal spot images, and the device performs the range finding through solving a mean value, effectively reduces the measurement uncertainty in laser range finding via an averaging method, does not sacrifice the lateral resolution of a measurement device, and is better in application prospect.

Description

technical field [0001] The invention belongs to the field of laser ranging, and more specifically relates to a device for suppressing speckle effect by using sub-wave plane image shifting in line-focus imaging of triangular ranging. Background technique [0002] Laser ranging is a high-precision non-contact distance measurement method. The laser triangulation method uses the principle of laser triangulation to calculate the distance of the measured object through the triangle formed by the incident light and scattered light. [0003] In the laser triangulation method, the speckle effect of the laser limits the measurement accuracy of this method. The speckle effect of the laser means that when the laser is irradiated on the rough surface, due to the phase difference introduced by the surface elements of the rough surface, the scattered light superimposes and interferes in space, forming a random light intensity distribution, which makes the laser ranging method There is unc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S17/48G01S7/481
CPCG01S7/481G01S17/48
Inventor 赵斌喻杰
Owner HUAZHONG UNIV OF SCI & TECH
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