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Laser space corner correction method based on double phase-sensitive detectors (PSDs)

A space angle and laser technology, which is applied in the field of measurement technology and laser application, can solve the problems of inability to meet high-precision measurement, laser beam cannot be vertically incident, etc., and achieve the effect of low cost, wide application and strong environmental adaptability

Inactive Publication Date: 2014-12-24
CHANGCHUN UNIV OF SCI & TECH
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Problems solved by technology

However, the problem with this method itself is that the laser beam cannot be vertically incident on the PSD, so this method cannot meet the requirements of high-precision measurement.

Method used

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  • Laser space corner correction method based on double phase-sensitive detectors (PSDs)
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  • Laser space corner correction method based on double phase-sensitive detectors (PSDs)

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Embodiment Construction

[0014] The laser space angle correction method based on double PSD of the present invention is realized in this way, see figure 1 As shown, a filter 2 and a pentaprism 3 are placed between the laser 1 and the two-dimensional PSD position sensor 4, wherein one side of the pentaprism 3 is coated with a semi-reflective and semi-transparent coating, and the two-dimensional PSD position sensor 6 is placed on At the focal point of lens 5. In actual process use, the light beam emitted by the laser 1 has a certain spatial angle with the plane where the two-dimensional PSD position sensor 4 is located.

[0015] See figure 1 , figure 2 As shown, ideally, the laser beam 7 is irradiated vertically at the point C of the two-dimensional PSD position sensor 6 through the lens 5. In actual use, the laser beam has a spatial angle with the plane where the two-dimensional PSD position sensor 4 is located, and the laser beam 8 passes through The pentaprism 3 is divided into two beams of light...

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Abstract

The invention provides a laser space corner correction method based on double phase-sensitive detectors (PSDs), and belongs to the fields of measuring technologies and laser technology application. In the process of measurement, due to the fact that a space corner exists on a plane where a laser beam and a laser receiver are arranged, the space corner needs to be corrected to obtain a laser vertical incidence point coordinate. The laser space corner correction method based on the double PSDs mainly comprises a laser 1, a filtering piece 2, a pentaprism 3, a two-dimension PSD position transducer 4, a lens 5 and a two-dimension PSD position transducer 6. In the process of actual use, the space corner can be corrected by calculating position coordinates of light spots which is irradiated on the two-dimension PSD position transducer 4 and the two-dimension PSD position transducer 6, and then a coordinate of a point which is obtained by laser vertical incidence on the laser receiver.

Description

technical field [0001] The invention relates to a laser space angle correction method based on double PSD, which belongs to the field of measurement technology and laser application. Background technique [0002] When the laser beam is used as a collimated beam, it is usually required that the laser beam is vertically incident on the laser receiving device. However, in actual use, the laser beam generally cannot be irradiated vertically on the laser receiving device. Space angle, the space angle needs to be corrected in the field of high-precision measurement. In the prior art related to the present invention, it is mainly the research on the measurement method of the spatial angle, such as: [0003] "A method for measuring the spatial angle of the light source" [Wang Jiang, Acta Electronics, 11(2011): 2692-2695]. This method uses sensors on different surfaces of the polyhedron to measure the spatial angle of the light source. By establishing an equivalent vector model, Th...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01C1/00
Inventor 高艺姜涛丁红昌王红平曹国华张桂林
Owner CHANGCHUN UNIV OF SCI & TECH
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