CN112510470A - Laser output module positioning switching mechanism and calibration method - Google Patents

Laser output module positioning switching mechanism and calibration method Download PDF

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Publication number
CN112510470A
CN112510470A CN202011392987.8A CN202011392987A CN112510470A CN 112510470 A CN112510470 A CN 112510470A CN 202011392987 A CN202011392987 A CN 202011392987A CN 112510470 A CN112510470 A CN 112510470A
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CN
China
Prior art keywords
calibration
positioning
output module
laser output
hole
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Pending
Application number
CN202011392987.8A
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Chinese (zh)
Inventor
王�锋
张卫
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Jiangxi Zhongjiu Optoelectronic Industry Research Institute
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Jiangxi Zhongjiu Optoelectronic Industry Research Institute
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Priority to CN202011392987.8A priority Critical patent/CN112510470A/en
Publication of CN112510470A publication Critical patent/CN112510470A/en
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/005—Optical devices external to the laser cavity, specially adapted for lasers, e.g. for homogenisation of the beam or for manipulating laser pulses, e.g. pulse shaping
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/005—Optical devices external to the laser cavity, specially adapted for lasers, e.g. for homogenisation of the beam or for manipulating laser pulses, e.g. pulse shaping
    • H01S3/0057—Temporal shaping, e.g. pulse compression, frequency chirping
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/005—Optical devices external to the laser cavity, specially adapted for lasers, e.g. for homogenisation of the beam or for manipulating laser pulses, e.g. pulse shaping
    • H01S3/0071—Beam steering, e.g. whereby a mirror outside the cavity is present to change the beam direction
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/02—Constructional details

Abstract

The invention discloses a laser output module positioning switching mechanism and a calibration method, belonging to the technical application field of lasers, and comprising a laser output module, a switching plate, a calibration movable block, a calibration plate and a calibration device; the laser output module is arranged on the adapter plate; the calibration device is fixed on the calibration plate; the adapter plate is arranged on the calibration plate; the calibration movable block is arranged on the adapter plate; the laser beam emitted by the laser output module is injected into the calibration device. According to the scheme, the pupil and the optical axis of the output light beam can be accurately calibrated in the assembling and calibrating stage of the laser output module, and the calibration of the positioning mechanism of the laser output module is realized. The laser output module calibrated by the calibration device has good interchangeability, and output light beams before and after module replacement can be accurately consistent in the aspects of pupils and optical axes in an application field without a photoelectric auxiliary adjusting device, so that the maintainability of equipment is remarkably improved.

Description

Laser output module positioning switching mechanism and calibration method
Technical Field
The invention relates to the technical application field of lasers, in particular to a laser output module positioning and switching mechanism and a calibration method.
Background
Compared with a single laser, the laser output module formed by the laser and a plurality of optical mechanical elements (such as a beam expander, a plane mirror and the like) greatly expands the application of industrial laser and powerfully promotes the development of the traditional industry and the emerging industry.
The laser output combined module is formed by accurately assembling and adjusting a laser and a plurality of optical mechanical elements, and the relation between the spatial position and the angle is relatively fixed. Although the common calibration device and the calibration method can ensure that the output of the laser output module after the installation and adjustment meets the application requirement, the accuracy and consistency of the output light beams of different laser output modules in the aspects of pupils and optical axes are difficult to ensure, so that the interchangeability between the laser output modules is poor. After the laser output module is integrated in the industrial equipment, the laser output module is transferred to an application field along with the industrial equipment. Under the condition of failure, the laser output module with poor interchangeability is limited by application site conditions and is difficult to be quickly maintained in an integral replacement mode, so that the maintainability of equipment is reduced, and the application and popularization of the high-precision laser output module in the equipment with severe site environment are restricted.
Disclosure of Invention
The present invention is directed to at least one of the technical problems of the prior art, and provides a positioning and adapting mechanism of a laser output module and a calibration method thereof.
The technical solution of the invention is as follows:
a laser output module positioning and switching mechanism comprising:
a calibration plate;
the adapter plate is detachably arranged on the calibration plate through a positioning mechanism;
the laser output module is arranged on the adapter plate;
the calibration device is fixedly arranged on the calibration plate; the laser beam emitted by the laser output module can be shot into the calibration device.
As a preferable scheme of the invention, the positioning mechanism comprises a calibration movable block, and a threaded through hole and a calibration movable block mounting hole are arranged on the calibration movable block.
As a preferred scheme of the invention, the calibration plate is provided with an adapter plate positioning hole and a calibration movable block positioning hole, the adapter plate is provided with an adapter plate mounting hole and a groove, the groove is internally provided with a threaded blind hole and a positioning through hole,
the calibration movable block positioning hole, the positioning through hole and the calibration movable block mounting hole are matched in position and are fixedly connected through an insertable calibration pin; the threaded blind hole is matched with the threaded through hole in position and is fixedly connected with the threaded through hole through a screw.
As a preferred embodiment of the present invention, the positioning holes of the adapter plate and the positioning holes of the calibration movable block are disposed on opposite corners of the calibration plate.
As a preferred embodiment of the present invention, the calibration device includes a positioning diaphragm, an objective lens set and a far-field detection system, and the laser beam output by the laser output module can sequentially pass through the positioning diaphragm, the objective lens set and the far-field detection system.
The invention also discloses a calibration method of the laser output module positioning and switching mechanism, which comprises the following steps:
a. mounting a laser output module on an adapter plate, and mounting the adapter plate on a calibration plate;
b. adjusting the adapter plate to align the adapter plate mounting hole of the adapter plate with the adapter plate positioning hole of the calibration plate, and penetrating the positioning pin;
c. adjusting the adapter plate to align the positioning through hole in the groove with the positioning hole of the calibration movable block on the calibration plate;
d. placing the calibration movable block in the groove of the adapter plate, adjusting the calibration movable block to align the mounting hole of the calibration movable block on the calibration movable block with the positioning hole of the calibration movable block on the calibration plate, penetrating the calibration pin, and fixing the calibration movable plate on the adapter plate through a fastening screw;
e. the laser output module outputs a laser beam, observes the position of a light spot at the positioning diaphragm and a far-field image of the light beam formed by a far-field detection system, measures the offset of a pupil relative to the center of the positioning diaphragm, measures the optical axis deviation of the far-field mass center position of the light beam and the far-field calibration zero position, and measures the far-field light beam quality beta value of the light beam;
f. comparing with a calibration qualified criterion, when any measurement result of the offset of the pupil relative to the center of the positioning diaphragm, the optical axis deviation and the beam quality beta value does not meet the requirement of the qualified criterion, adjusting an optical component in the laser output module until all the measurement results meet the requirement of the calibration qualified criterion;
g. all components in the laser output module are fastened on the adapter plate;
h. and taking out the positioning pin and the calibration pin, removing the calibration device, and finishing the calibration of the laser output module positioning and switching mechanism.
The invention has the following beneficial effects: according to the laser output module positioning device, the adapter plate and the positioning mechanism (the calibration movable block and the calibration movable block positioning hole on the calibration movable block) are designed separately, and the spatial position relationship between the adapter plate and the positioning mechanism is completely cured after the positioning is finished, so that the unique spatial position relationship of the laser output module arranged on the adapter plate relative to the positioning mechanism is finally realized. On the basis, the light path calibration of the laser output module arranged on the adapter bottom plate is completed by means of a positioning diaphragm and a far field detection system in the calibration device, so that the pupil deviation, the optical axis deviation and the beam quality beta value of the output beam meet the requirements of qualified criteria. The laser output module after calibration based on the method has high consistency of output light in the aspects of pupil and optical axis, and can ensure interchangeability of different laser output modules after calibration.
Drawings
Fig. 1 is a schematic perspective view of a preferred embodiment of the present invention.
Fig. 2 is a schematic diagram of the exploded structure of fig. 1.
In the figure, 1-laser output module, 2-adapter plate, 3-calibration plate, 4-positioning diaphragm, 5-objective lens group, 6-far field detection system, 7-adapter plate mounting hole, 8-adapter plate positioning hole, 9-calibration movable block positioning hole, 10-positioning through hole, 11-calibration movable block, 12-calibration movable block mounting hole, 13-threaded through hole, 14-threaded blind hole, 15-groove, 16-positioning pin and 17-calibration pin.
Detailed Description
Reference will now be made in detail to the present preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like elements throughout.
In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and larger, smaller, inner, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.
Referring to fig. 1 to 2, a preferred embodiment of the present invention:
a laser output module positioning and switching mechanism comprising:
a calibration plate 3;
the adapter plate 2 is detachably arranged on the calibration plate 3 through a positioning mechanism;
the laser output module 1 is arranged on the adapter plate 2;
a calibration device fixedly arranged on the calibration plate 3; the laser beam emitted by the laser output module 1 can be injected into the calibration device.
The adapter plate and the positioning mechanism (the calibration movable block and the positioning hole of the calibration movable block) are designed separately, and the spatial position relationship between the adapter plate and the positioning mechanism is completely cured after the positioning is finished, so that the unique spatial position relationship of the laser output module arranged on the adapter plate relative to the positioning mechanism is finally realized. On the basis, the light path calibration of the laser output module arranged on the adapter bottom plate is completed by means of a positioning diaphragm and a far field detection system in the calibration device, so that the pupil deviation, the optical axis deviation and the beam quality beta value of the output beam meet the requirements of qualified criteria. The laser output module after calibration based on the method has high consistency of output light in the aspects of pupil and optical axis, and can ensure interchangeability of different laser output modules after calibration.
As a preferred embodiment of the present invention, it may also have the following additional technical features:
the positioning mechanism comprises a calibration movable block 11, wherein a threaded through hole 13 and a calibration movable block mounting hole 12 are formed in the calibration movable block.
The calibration plate 3 is provided with an adapter plate positioning hole 8 and a calibration movable block positioning hole 9, the adapter plate 2 is provided with an adapter plate mounting hole 7 and a groove 15, and the groove 15 is internally provided with a threaded blind hole 14 and a positioning through hole 10;
the calibration movable block positioning hole 9, the positioning through hole 10 and the calibration movable block mounting hole 12 are matched in position and are fixedly connected through an insertable calibration pin 17; the threaded blind hole 14 and the threaded through hole 13 are matched in position and fixedly connected through a screw.
The adapter plate positioning hole 8 and the calibration movable block positioning hole 9 are arranged on opposite corners of the calibration plate 3.
The calibration device comprises a positioning diaphragm 4, an objective lens group 5 and a far-field detection system 6, and specifically, the positioning diaphragm, the objective lens group and the far-field detection system are linearly arranged; the laser beam output by the laser output module 1 can sequentially pass through a positioning diaphragm 4, an objective lens group 5 and a far field detection system 6.
The far-field detection system is a CCD camera.
The invention also discloses another embodiment, a calibration method of the laser output module positioning and switching mechanism, which comprises the following steps:
a. mounting the laser output module 1 on the adapter plate 2, and mounting the adapter plate 2 on the calibration plate 3;
b. adjusting the adapter plate 2 to align the adapter plate mounting hole 7 of the adapter plate 2 with the adapter plate positioning hole 8 of the calibration plate 3 and penetrate a positioning pin 16;
c. adjusting the adapter plate 2 to align the positioning through hole 10 in the groove 15 with the positioning hole 9 of the calibration movable block on the calibration plate 3;
d. placing the calibration movable block 11 in the groove 15 of the adapter plate, adjusting the calibration movable block 11 to align the calibration movable block mounting hole 12 on the calibration movable block 11 with the calibration movable block positioning hole 9 on the calibration plate 3, penetrating the calibration pin 17, and fixing the calibration movable block 11 on the adapter plate 2 through a fastening screw;
e. the laser output module outputs a laser beam, observes the position of a light spot at the positioning diaphragm 4 and a far-field image of the light beam formed by the far-field detection system 6, measures the offset of a pupil relative to the center of the positioning diaphragm, measures the optical axis deviation of the far-field mass center position of the light beam and the far-field calibration zero position, and measures the far-field light beam quality beta value of the light beam; the specific test methods for these three performance values are as follows:
offset of diaphragm center: the light beam generates a light spot on the diaphragm 4, and the offset of the light beam in the center of the diaphragm 4 can be determined by observing the eccentricity of the light spot and the diaphragm.
Far field centroid position of light beam: the light beam passing through the diaphragm 4 passes through the objective lens group 5 to form a small spot on the far-field detection system 6, and the deviation between the spot and the originally calibrated spot is observed to determine the optical axis deviation.
Far field beam mass β value: the small spot is actually a light spot formed after the light beam is focused, and the size of the light spot can be measured by the far-field detection system 6, and the size value is the light beam quality beta value compared with the theoretical size value.
f. Comparing with a calibration qualified criterion, when any measurement result of the offset of the pupil relative to the center of the positioning diaphragm, the optical axis deviation and the far-field beam quality beta value does not meet the requirement of the qualified criterion, adjusting an optical component in the laser output module until all the measurement results meet the requirement of the calibration qualified criterion;
g. all components in the laser output module 1 are fastened on the adapter plate 2;
h. and taking out the positioning pin 16 and the calibration pin 17, removing the calibration device, and finishing the calibration of the laser output module positioning and switching mechanism.
The above additional technical features can be freely combined and used in superposition by those skilled in the art without conflict.
The above description is only a preferred embodiment of the present invention, and the technical solutions that achieve the objects of the present invention by basically the same means are all within the protection scope of the present invention.

Claims (7)

1. A laser output module positioning and switching mechanism is characterized by comprising:
a calibration plate (3);
the adapter plate (2) is detachably arranged on the calibration plate (3) through a positioning mechanism;
a laser output module (1) arranged on the adapter plate (2);
a calibration device fixedly arranged on the calibration plate (3); the laser beam emitted by the laser output module (1) can be injected into the calibration device.
2. The laser output module positioning adapter mechanism according to claim 1, wherein the positioning mechanism comprises a calibration movable block (11) provided with a threaded through hole (13) and a calibration movable block mounting hole (12).
3. The laser output module positioning and switching mechanism according to claim 2, wherein the calibration plate (3) is provided with a positioning hole (8) for the adapter plate and a positioning hole (9) for the calibration movable block, the adapter plate (2) is provided with an installation hole (7) for the adapter plate and a groove (15), and the groove (15) is provided with a blind threaded hole (14) and a positioning through hole (10);
the calibration movable block positioning hole (9), the positioning through hole (10) and the calibration movable block mounting hole (12) are matched in position and fixedly connected through an insertable calibration pin (17); the threaded blind hole (14) is matched with the threaded through hole (13) in position and is fixedly connected with the threaded through hole through a screw.
4. The laser output module positioning adapter mechanism according to claim 1, wherein the adapter plate positioning hole (8) and the calibration movable block positioning hole (9) are provided on opposite corners of the calibration plate (3).
5. The laser output module positioning adapter mechanism according to claim 1, wherein the calibration device comprises a positioning diaphragm (4), an objective lens group (5) and a far-field detection system (6); the laser beam output by the laser output module (1) can sequentially pass through the positioning diaphragm (4), the objective lens group (5) and the far-field detection system (6).
6. The laser output module positioning adapter mechanism of claim 5, wherein the far field detection system is a CCD camera.
7. A calibration method for a laser output module positioning and switching mechanism is characterized by comprising the following steps:
a. mounting the laser output module (1) on the adapter plate (2), and mounting the adapter plate (2) on the calibration plate (3);
b. adjusting the adapter plate (2) to align the adapter plate mounting hole (7) of the adapter plate (2) with the adapter plate positioning hole (8) of the calibration plate (3) and penetrate into the positioning pin (16);
c. adjusting the adapter plate (2) to align the positioning through hole (10) in the groove (15) with the positioning hole (9) of the calibration movable block on the calibration plate (3);
d. placing the calibration movable block (11) in a groove (15) of the adapter plate, adjusting the calibration movable block (11), aligning a calibration movable block mounting hole (12) on the calibration movable block with a calibration movable block positioning hole (9) on the calibration plate (3), penetrating a calibration pin (17), and fixing the calibration movable block (11) on the adapter plate (2) through a fastening screw;
e. the laser output module outputs a laser beam, observes the position of a light spot at the positioning diaphragm and a far-field image of the light beam formed by the far-field detection system (6), measures the offset of a pupil relative to the center of the positioning diaphragm, measures the optical axis deviation of the far-field mass center position of the light beam and the far-field calibration zero position, and measures the far-field light beam quality beta value of the light beam;
f. comparing with a calibration qualified criterion, when any measurement result of the offset of the pupil relative to the center of the positioning diaphragm, the optical axis deviation and the far-field beam quality beta value does not meet the requirement of the qualified criterion, adjusting an optical component in the laser output module until all the measurement results meet the requirement of the calibration qualified criterion;
g. all components in the laser output module (1) are fastened on the adapter plate (2);
h. and taking out the positioning pin (16) and the calibration pin (17), removing the calibration device, and finishing the calibration of the laser output module positioning and switching mechanism.
CN202011392987.8A 2020-12-01 2020-12-01 Laser output module positioning switching mechanism and calibration method Pending CN112510470A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202011392987.8A CN112510470A (en) 2020-12-01 2020-12-01 Laser output module positioning switching mechanism and calibration method

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Application Number Priority Date Filing Date Title
CN202011392987.8A CN112510470A (en) 2020-12-01 2020-12-01 Laser output module positioning switching mechanism and calibration method

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Application publication date: 20210316