CN109238654B - Calibration device and method for improving laser parallelism - Google Patents

Calibration device and method for improving laser parallelism Download PDF

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Publication number
CN109238654B
CN109238654B CN201810945423.9A CN201810945423A CN109238654B CN 109238654 B CN109238654 B CN 109238654B CN 201810945423 A CN201810945423 A CN 201810945423A CN 109238654 B CN109238654 B CN 109238654B
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China
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autocollimator
laser
axis
adjusting
calibration
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CN109238654A (en
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陈永辉
郝长峰
李忠玉
张庆
左献宝
刘廷国
史纪村
刘玉恒
韩志宇
李敏
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Henan Gaoyuan Maintenance Technology Of Highway Co ltd
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Henan Gaoyuan Maintenance Technology Of Highway Co ltd
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01MTESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M11/00Testing of optical apparatus; Testing structures by optical methods not otherwise provided for

Abstract

The invention discloses a calibration device for improving laser parallelism, wherein a cross beam and a guide rail are combined and fixed in a T shape and supported by an adjusting lifting support leg a, an adjusting lifting support leg b and an adjusting lifting support leg c at three points, an autocollimator platform is glidingly matched on the guide rail through a sliding block, an L-shaped support in the autocollimator platform is fixed on the sliding block, two side plates of the L-shaped support are respectively provided with an adjusting pan head a and an adjusting pan head b, the adjusting pan head a and the adjusting pan head b are respectively provided with an autocollimator a and an autocollimator b, and the included angle between the autocollimator a and the autocollimator b is 90 degrees. The invention also specifically discloses a calibration method for improving the laser parallelism. The calibration device for improving the laser parallelism, which is designed by the invention, has the advantages of low cost, simple structure, convenience in use and higher calibration precision.

Description

Calibration device and method for improving laser parallelism
Technical Field
The invention belongs to the technical field of laser parallelism correction test instruments, and particularly relates to a calibration device and method for improving laser parallelism.
Background
Laser parallelism parameter plays crucial effect to realizing precision measurement and data acquisition in the laser class product, consequently laser parallel correction all need be carried out to a lot of laser class products after accomplishing to present, present traditional laser parallel correction method is that the tester adopts laser parallel correction test instrument to test with the naked eye, present laser parallel correction instrument has used for a long time and can cause the damage to operator's eyes, produce eye fatigue easily, and laser parallel correction observes through naked eye and whether differentiates very difficultly, there is very big error.
The other way of laser beam parallelism calibration is realized by an interference method, a detected light beam is divided into two beams of light, then interference is generated at a proper position, if an incident light beam is parallel light, the generated interference fringes are straight fringes or no fringes, the method has the advantages of high measurement accuracy, expensive interferometer, large volume, inconvenience in use, large influence of vibration on measurement, small angle range capable of measuring and high requirement on the working proficiency of operators.
Disclosure of Invention
The invention solves the technical problem of providing a calibration device and a calibration method for improving the laser parallelism, which have the advantages of low cost, simple structure, convenient use and higher calibration precision.
The invention adopts the following technical scheme for solving the technical problems, and the calibration device for improving the laser parallelism is characterized in that: the cross beam and the guide rail are combined and fixed in a T shape and supported by three points of an adjusting lifting supporting leg a, an adjusting lifting supporting leg b and an adjusting lifting supporting leg c, the autocollimator platform is slidably matched on the guide rail through a sliding block, an L-shaped support in the autocollimator platform is fixed on the sliding block, two side plates of the L-shaped support are respectively provided with an adjusting cloud platform a and an adjusting cloud platform b, the adjusting cloud platform a and the adjusting cloud platform b are respectively provided with an autocollimator a and an autocollimator b, and the included angle between the autocollimator a and the autocollimator b is 90 degrees.
Preferably, be equipped with on the regulation cloud platform a and carry out angle fine setting's fine setting screw group a to autocollimator a orientation, be equipped with on the regulation cloud platform b and carry out angle fine setting screw group b to autocollimator b orientation.
The calibration method for improving the laser parallelism is characterized by comprising the following specific steps of:
step S1: placing the laser parallelism improving calibration device below an instrument for emitting laser;
step S2: adjusting the lifting support leg a, the lifting support leg b and the lifting support leg c, and checking by using a level meter to enable the guide rail to be parallel to the ground;
step S3: placing a reflector with one surface vertical to the ground on the horizontal ground opposite to the emission direction of the autocollimator a;
step S4: the angle of the measuring laser of the autocollimator a in the horizontal direction, namely the X axis, and the angle of the measuring laser in the vertical direction, namely the Y axis, is zero by adjusting the fine adjustment screw group a;
step S5: the autocollimator b is right opposite to the laser emission direction of each instrument by sliding a sliding block on a guide rail, and the angular offset of the autocollimator a and the autocollimator b of each instrument in an X axis and a Y axis is respectively read;
step S6: and subtracting the angular offset of the autocollimator a in the X axis and the Y axis from the angular offset of the autocollimator b in the X axis and the Y axis of each instrument to obtain data, wherein the data is the absolute offset angle of each instrument in the X axis and the Y axis, and then calculating to obtain the relative offset angle of each instrument in the X axis and the Y axis.
Compared with the prior art, the invention has the following beneficial effects: the calibration device for improving the laser parallelism, which is designed by the invention, has the advantages of low cost, simple structure, convenience in use and higher calibration precision.
Drawings
FIG. 1 is a schematic structural diagram of a calibration apparatus for improving laser parallelism according to the present invention;
fig. 2 is a schematic structural diagram of an autocollimator stage of the present invention.
In the figure: 1-adjusting lifting supporting legs a, 2-adjusting lifting supporting legs b, 3-adjusting lifting supporting legs c, 4-cross beams, 5-guide rails, 6-slide blocks, 7-autocollimator platforms, 8-L-shaped supports, 9-adjusting pan heads a, 10-autocollimators a, 11-fine adjusting screw groups a, 12-adjusting pan heads b, 13-autocollimators b and 14-fine adjusting screw groups b.
Detailed Description
The technical scheme of the invention is described in detail by combining the attached drawings, the calibrating device for improving the laser parallelism comprises a cross beam 4 and a guide rail 5 which are combined and fixed in a T shape and supported by an adjusting lifting supporting leg a1, an adjusting lifting supporting leg b 2 and an adjusting lifting supporting leg c 3 at three points, an autocollimator platform 7 is slidably matched on the guide rail 5 through a sliding block 6, an L-shaped support 8 in the autocollimator platform 7 is fixed on the sliding block 6, an adjusting pan head a 9 and an adjusting pan head b 12 are respectively arranged on two side plates of the L-shaped support 8, an autocollimator a 10 and an autocollimator b 13 are respectively arranged on the adjusting pan head a 9 and the adjusting pan head b 12, wherein the included angle between the autocollimator a 10 and the autocollimator b 13 is 90 degrees, a fine adjusting screw group a11 for finely adjusting the angle of the autocollimator a 10 is arranged on the adjusting pan head a 9, and a fine adjusting screw group b 11 for finely 14.
An autocollimator a: a laser incident angle measuring device can measure the angles of two axes of an X axis and a Y axis;
an autocollimator b: compared with the autocollimator a, the parallel laser emission function is added.
The measurement principle is as follows: the autocollimator a and the autocollimator b are vertically fixed on the same sliding block, the sliding block can slide on the guide rail, and the autocollimator a cannot be completely parallel in sliding along the guide rail, so that the angles of the X axis and the Y axis of laser between measuring instruments have errors.
The calibration method for improving the laser parallelism comprises the following specific steps:
step S1: placing the laser parallelism improving calibration device below an instrument for emitting laser;
step S2: adjusting the lifting support leg a, the lifting support leg b and the lifting support leg c, and checking by using a level meter to enable the guide rail to be parallel to the ground;
step S3: placing a reflector with one surface vertical to the ground on the horizontal ground opposite to the emission direction of the autocollimator a;
step S4: the angle of the measuring laser of the autocollimator a in the horizontal direction, namely the X axis, and the angle of the measuring laser in the vertical direction, namely the Y axis, is zero by adjusting the fine adjustment screw group a;
step S5: the autocollimator b is right opposite to the laser emission direction of each instrument by sliding a sliding block on a guide rail, and the angular offset of the autocollimator a and the autocollimator b of each instrument in an X axis and a Y axis is respectively read;
step S6: and subtracting the angular offset of the autocollimator a in the X axis and the Y axis from the angular offset of the autocollimator b in the X axis and the Y axis of each instrument to obtain data, wherein the data is the absolute offset angle of each instrument in the X axis and the Y axis, and then calculating to obtain the relative offset angle of each instrument in the X axis and the Y axis.
While there have been shown and described what are at present considered the fundamental principles of the invention, its essential features and advantages, the invention further resides in various changes and modifications which fall within the scope of the invention as claimed.

Claims (2)

1. A calibration method for improving laser parallelism is characterized in that: the cross beam and the guide rail in the calibrating device for improving the laser parallelism are combined and fixed in a T shape and supported by an adjusting lifting support leg a, an adjusting lifting support leg b and an adjusting lifting support leg c at three points, an autocollimator platform is glidingly matched on the guide rail through a slide block, an L-shaped support in the autocollimator platform is fixed on the slide block, two side plates of the L-shaped support are respectively provided with an adjusting pan head a and an adjusting pan head b, the adjusting pan head a and the adjusting pan head b are respectively provided with an autocollimator a and an autocollimator b, and the included angle between the autocollimator a and the autocollimator b is 90 degrees;
the calibration method for improving the laser parallelism comprises the following specific steps:
step S1: placing the laser parallelism improving calibration device below an instrument emitting laser;
step S2: adjusting the lifting support leg a, the lifting support leg b and the lifting support leg c, and checking by using a level meter to enable the guide rail to be parallel to the ground;
step S3: placing a reflector with one surface vertical to the ground on the horizontal ground opposite to the emission direction of the autocollimator a;
step S4: the angle of the measuring laser of the autocollimator a in the horizontal direction, namely the X axis, and the angle of the measuring laser in the vertical direction, namely the Y axis, is zero by adjusting the fine adjustment screw group a;
step S5: the autocollimator b faces the laser emission direction of the laser emission instrument by sliding the sliding block on the guide rail, and the angular offset of the autocollimator a and the autocollimator b of the laser emission instrument on the X axis and the Y axis is read respectively;
step S6: and subtracting the angular offset of the autocollimator a on the X axis and the Y axis from the angular offset of the autocollimator b on the X axis and the Y axis of the laser emitting instrument to obtain data, wherein the data is the absolute offset angle quantity of the laser emitting instrument on the X axis and the Y axis, and then the relative offset angle quantity of the laser emitting instrument on the X axis and the Y axis is obtained through calculation.
2. The calibration method for improving the parallelism of laser beams according to claim 1, wherein: and a fine adjustment screw group a for fine adjustment of the angle of the orientation of the autocollimator a is arranged on the adjusting holder a, and a fine adjustment screw group b for fine adjustment of the angle of the orientation of the autocollimator b is arranged on the adjusting holder b.
CN201810945423.9A 2018-08-20 2018-08-20 Calibration device and method for improving laser parallelism Active CN109238654B (en)

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CN109238654B true CN109238654B (en) 2020-04-10

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110440715B (en) * 2019-05-28 2020-11-17 重庆邮电大学 Error compensation method of photoelectric autocollimator under long-distance working condition

Citations (6)

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Publication number Priority date Publication date Assignee Title
CN103486998A (en) * 2013-09-18 2014-01-01 中国科学院西安光学精密机械研究所 Auto-collimator indicating value error calibrating device and method
CN103643620A (en) * 2013-12-18 2014-03-19 北京市路兴公路新技术有限公司 Laser beam parallelism adjustment system and laser beam parallelism adjustment method for road surface deflection measurement
KR20140115587A (en) * 2013-03-21 2014-10-01 한국전자통신연구원 Laser beam height aligner
CN204008064U (en) * 2014-08-04 2014-12-10 孝感华中精密仪器有限公司 The inclined to one side detector of a kind of optical axis center
CN105424322A (en) * 2015-11-09 2016-03-23 中国科学院长春光学精密机械与物理研究所 Self-calibration optical axis parallelism detector and detection method
CN205449447U (en) * 2016-02-23 2016-08-10 丹阳丹耀光学有限公司 Optical lens divided beams depth of parallelism detection device

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20140115587A (en) * 2013-03-21 2014-10-01 한국전자통신연구원 Laser beam height aligner
CN103486998A (en) * 2013-09-18 2014-01-01 中国科学院西安光学精密机械研究所 Auto-collimator indicating value error calibrating device and method
CN103643620A (en) * 2013-12-18 2014-03-19 北京市路兴公路新技术有限公司 Laser beam parallelism adjustment system and laser beam parallelism adjustment method for road surface deflection measurement
CN204008064U (en) * 2014-08-04 2014-12-10 孝感华中精密仪器有限公司 The inclined to one side detector of a kind of optical axis center
CN105424322A (en) * 2015-11-09 2016-03-23 中国科学院长春光学精密机械与物理研究所 Self-calibration optical axis parallelism detector and detection method
CN205449447U (en) * 2016-02-23 2016-08-10 丹阳丹耀光学有限公司 Optical lens divided beams depth of parallelism detection device

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