CN115000875A - Laser obstacle clearing device and method capable of realizing long-distance focusing point of acting laser and confocal of indicating light - Google Patents

Laser obstacle clearing device and method capable of realizing long-distance focusing point of acting laser and confocal of indicating light Download PDF

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Publication number
CN115000875A
CN115000875A CN202210759102.6A CN202210759102A CN115000875A CN 115000875 A CN115000875 A CN 115000875A CN 202210759102 A CN202210759102 A CN 202210759102A CN 115000875 A CN115000875 A CN 115000875A
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CN
China
Prior art keywords
laser
light
focusing
lens
mirror
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Pending
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CN202210759102.6A
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Chinese (zh)
Inventor
陈国鑫
其他发明人请求不公开姓名
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Sichuan Hong'an Base Intelligent Technology Co ltd
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Sichuan Hong'an Base Intelligent Technology Co ltd
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Priority to CN202210759102.6A priority Critical patent/CN115000875A/en
Publication of CN115000875A publication Critical patent/CN115000875A/en
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G1/00—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines
    • H02G1/02—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for overhead lines or cables
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
    • B23K26/06—Shaping the laser beam, e.g. by masks or multi-focusing
    • B23K26/064—Shaping the laser beam, e.g. by masks or multi-focusing by means of optical elements, e.g. lenses, mirrors or prisms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
    • B23K26/06—Shaping the laser beam, e.g. by masks or multi-focusing
    • B23K26/064—Shaping the laser beam, e.g. by masks or multi-focusing by means of optical elements, e.g. lenses, mirrors or prisms
    • B23K26/0648—Shaping the laser beam, e.g. by masks or multi-focusing by means of optical elements, e.g. lenses, mirrors or prisms comprising lenses
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/36—Removing material
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B23/00—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/10—Beam splitting or combining systems
    • G02B27/1006—Beam splitting or combining systems for splitting or combining different wavelengths

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  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Mechanical Engineering (AREA)
  • General Physics & Mathematics (AREA)
  • Astronomy & Astrophysics (AREA)
  • Laser Surgery Devices (AREA)

Abstract

The invention relates to the technical field of lasers, in particular to a laser obstacle clearing device and a method capable of realizing long-distance focusing of laser and confocal of indicating light. The laser comprises a laser, wherein a laser output end of the laser is provided with a focusing mirror, and visible indicating light is coupled in the laser; the light outlet end of the focusing mirror is detachably connected with an additional mirror, and the additional mirror and the focusing mirror are coaxially arranged and used for correcting the focusing position of the visible indication light to the acting laser focusing point of the focusing mirror when the visible indication light is used for assisting in observing and aiming the target. The invention considers the problem of different convergence points caused by different wavelengths of the visible indicating light and the acting laser, and adjusts the convergence point of the visible indicating light to the same position as the focusing point of the acting laser by adding the additional lens outside the laser focusing lens, thereby achieving the effect of clearly indicating the target.

Description

Laser obstacle clearing device and method capable of realizing long-distance focusing point of acting laser and confocal of indicating light
Technical Field
The invention relates to the technical field of lasers, in particular to a laser obstacle clearing device and a method capable of realizing long-distance focusing of laser and confocal of indicating light.
Background
In the process of electric equipment operation, a high-power laser obstacle clearing device capable of performing long-distance focusing operation is often needed. The high-power laser obstacle clearing device is generally invisible laser, when the invisible laser needs to be focused on a distant target, whether the invisible laser aims at the target cannot be determined, and the existing method generally adds a beam of paraxial parallel visible laser or combines the beam of coaxial visible laser for indication by arranging a beam combining structure behind a focusing lens. The mode of externally adding paraxial parallel visible laser or combining coaxial visible laser behind a focusing lens is used as visible indicating light and has natural defects, firstly, the paraxial parallel light is difficult to adjust parallelism, a focusing point cannot be completely and accurately indicated, and secondly, the mode of combining coaxial visible laser behind the focusing lens is easy to be influenced by vibration, temperature difference and the like to cause indication deviation. The invisible action laser and the visible indication light are coupled to one optical fiber for output, so that the coaxial problem can be solved, however, the focusing mirror is designed according to the wavelength of the invisible action laser, the wavelengths of the visible indication light and the invisible action laser are different, after the visible indication light is transmitted by the focusing mirror, the visible indication light is dispersed, the focusing position of the visible indication light is not on a target point, and the target at the target position cannot be seen by the visible indication light.
Disclosure of Invention
In order to solve the above problems, the present invention provides a laser obstacle clearing device, which adjusts the focus point of the visible indication light by adding an additional mirror, and corrects the focus position of the visible indication light to a target point, thereby achieving the effect of clearly indicating a target.
The technical scheme of the invention is as follows:
a laser obstacle clearing device capable of realizing confocal action of a laser remote focusing point and indicating light comprises a laser, wherein a focusing lens is arranged at the laser output end of the laser, and visible indicating light is coupled in the laser; the light outlet end of the focusing mirror is detachably connected with an additional mirror, and the additional mirror and the focusing mirror are coaxially arranged and used for correcting the focusing position of the visible indication light to the acting laser focusing point of the focusing mirror when the visible indication light is used for assisting in observing and aiming the target. The invention adds an additional lens outside the focusing lens of the laser obstacle clearing device, corrects the focusing point of the visible indicating light when the visible indicating light is used for indicating, and adjusts the convergent point of the visible indicating light to the position same as the focus of the acting laser so as to clearly see the aiming position.
Furthermore, a beam combining coupling structure is arranged in the laser and is used for coupling the acting laser and the visible indicating light into one optical fiber, so that all light beams are output by the laser through the same optical fiber, the structure is strong in coaxiality, and is more stable compared with a post-beam combining structure mode.
The action laser of the laser can be set to be infrared light or ultraviolet light, and the focus of the infrared light and the ultraviolet light focused by the focusing mirror is different from the front and back positions of the focusing position of the visible indication light, so the type of the selected additional mirror is different according to the difference of the action laser. The additional mirror selects a positive lens when the laser uses ultraviolet light as the active laser; the additional mirror selects the negative lens when the laser uses infrared light as the active laser.
Preferably, the focusing mirror comprises a lens group a and a lens group B which are coaxially arranged, wherein the lens group a is close to the output end of the laser, the focal length of the lens group a is adjustable, and the lens group B is fixedly arranged relative to the output end of the laser. By adjusting the focal length of the lens group A, light emitted by the light source has different divergence angles after passing through the lens group A, which is equal to the change of the object distance of the lens group B, thereby realizing focusing at different positions.
Preferably, the lens group a includes a first lens and a second lens, the focal length of the first lens is positive, the focal length of the second lens is negative, the absolute value of the focal length of the second lens is greater than the absolute value of the focal length of the first lens, the first lens is fixedly disposed relative to the output end of the laser, and the second lens can move back and forth along the optical axis direction. The focal length of the lens group B is positive, and the lens group B is a single lens or a combined lens. The first lens and the second lens may be a single lens or a combined lens. The first lens and the lens group B are fixed relative to the output end of the laser, the second lens can move, and the distance between the second lens and the first lens can be changed by moving the second lens back and forth, so that the focal length of the lens group A can be adjusted, and the focusing position can be changed. For example, the second lens is far away from the first lens, the focal length of the lens group a is changed, the divergence angle of light passing through the lens group a is increased, which is equivalent to that the object distance from the lens group B is decreased, and the focusing position of the lens group B is increased; on the contrary, the second lens is close to the first lens, the divergence angle of the light passing through the lens group a becomes smaller, which is equivalent to the case that the object distance from the lens group B becomes larger, and the focusing position of the lens group B becomes closer.
The method for realizing the confocal of the laser remote focusing point and the indicating light by applying the laser obstacle clearing device adjusts a focusing lens according to the distance between a target point and the laser obstacle clearing device, and ensures that the focusing point is on the target point; setting a laser in a visible light output mode, outputting visible indication light, installing an additional mirror at the light outlet end of a focusing mirror according to a designed distance, taking down the additional mirror after observing that a visible light convergence point is aligned with a target point, adjusting the laser in an output action laser mode, outputting action laser, and converging the action laser to the target point for operation.
Further, the distance between the additional mirror and the focusing mirror is determined by at least the wavelength of the applied laser light, the wavelength of the visible indicating light and the parameters of the additional mirror.
The invention has the beneficial effects that:
1. the invention utilizes the beam combination coupling structure to couple the visible indicating light and the acting laser to an optical fiber for output, and then the optical fiber is focused by the focusing lens, thereby fully ensuring the coaxiality of the visible indicating light and the acting laser and ensuring that the visible indicating light can accurately indicate a target.
2. The invention considers the problem of different convergence points caused by different wavelengths of the visible indicating light and the acting laser, and adjusts the convergence point of the visible indicating light to the same position as the focusing point of the acting laser by adding the additional lens outside the laser focusing lens, thereby achieving the effect of clearly indicating the target.
3. The invention improves the focusing lens, changes the mode of the traditional collimation scheme, is a dynamic focusing lens with simple structure, realizes the adjustment of the focal length of the focusing lens by reasonably configuring the lens combination mode of the focusing lens and only arranging the middle lens to move, simplifies the structure of the focusing lens and is convenient to realize the operation of farther distance.
Drawings
FIG. 1 is a schematic diagram of a paraxial parallel light target indication scheme in the prior art;
FIG. 2 is a schematic diagram of a rear-end combined structure target indication scheme in the background art;
FIG. 3 is a schematic diagram of the structure of a fiber laser according to the present invention;
FIG. 4 is a schematic diagram of the structure of the focusing mirror according to the present invention;
FIG. 5 is a schematic diagram of the focusing principle of light rays with different wavelengths;
FIG. 6 is a schematic structural view of embodiment 1 of the present invention;
FIG. 7 is a schematic diagram of the optical path in embodiment 1 of the present invention;
FIG. 8 is a schematic structural view of embodiment 2 of the present invention;
FIG. 9 is a schematic diagram of the optical path in embodiment 2 of the present invention;
in the figure, 1, an acting laser light path, 2, a visible indication light path, 3, an acting laser focusing point, 4, an acting laser light source, 5, a visible indication light source, 6, a beam combination coupling structure, 7, a laser output end, 8, a lens group A, 9, a first lens, 10, a second lens, 11, a lens group B, 12, an additional mirror, 13, a light path of infrared light without the additional mirror, 14, a light path of visible light with the additional mirror, 15 and a light path of ultraviolet light without the additional mirror.
Detailed Description
The embodiments of the present invention will be described in detail below with reference to the drawings and examples.
As shown in fig. 3, the structure of the laser obstacle clearing device is as follows: the laser light source device comprises one or more action laser light sources 4, a visible indication light source 5, a beam combination coupling structure 6 and a focusing mirror, wherein action laser light output by the action laser light sources and visible indication light output by the visible indication light source are coupled through the beam combination coupling structure and then input into a subsequent structure through the same optical fiber and finally output through the same laser output end or directly output after coupling, the output light is focused by the focusing mirror, and the focusing mirror can be designed into a proper structure according to the wavelength of the action laser to realize focusing at different distances.
As shown in fig. 4, the present invention designs a new focusing lens structure, which can realize remote dynamic focusing, and the specific structure is as follows:
the focusing mirror comprises a lens group A8 and a lens group B11 which are coaxially arranged along the direction of a light path in sequence, and the lens group A is close to the output end of the laser. The lens group A8 is a combination lens, and is composed of a first lens 9 and a second lens 10, the focal length of the first lens 9 is positive, the focal length of the second lens 10 is negative, and the absolute value of the focal length of the second lens is larger than the absolute value of the focal length of the first lens. The first lens and the second lens may be a single lens or a combined lens. The focal length of the lens group B is positive, and the lens group B is a single lens or a combined lens. The first lens 9 and the lens group B11 are fixed relative to the position of the laser output end, the second lens 10 can move back and forth along the optical axis, the adjustment of the focal length of the lens group A can be realized by moving the second lens, so that light emitted by a light source has different divergence angles after passing through the lens group A, which is equivalent to the change of the object distance of the lens group B, and the focusing at different distances is realized.
When the focusing lens is used for focusing, because the refractive indexes of light with different wavelengths in the focusing lens are different, the focuses focused by the focusing lens are also different, as shown in fig. 5, for example, common ultraviolet light, infrared light and visible light are taken as examples, three light rays are incident on a positive lens of the focusing lens through the same aperture angle, from the infrared light to the ultraviolet light, the refractive index of the lens is larger and larger, the corresponding focal power of the lens is also larger, the bending capability of the light beam is stronger, so that the infrared light, the visible light and the ultraviolet light are bent by the lens in sequence, and the converging point is closer to the lens in sequence. Therefore, the focusing position of the focusing lens set according to the acting laser (ultraviolet light or infrared light) has dispersion phenomenon for visible light, and the good focusing effect can not be achieved.
Therefore, the invention adds an additional lens 14 (the additional lens can be a lens or a lens group) at the light-emitting end of the focusing lens to correct the focusing position of the visible light. Through calculation, a proper additional mirror and the distance between the additional mirror and the focusing mirror can be determined, the additional mirror is detachably mounted at the light emitting end of the focusing mirror according to the designed distance, and the light path of the output visible light is corrected, so that the focusing position of the additional mirror is consistent with the focusing position of the acting laser. Considering that the visible light spot cannot be too small, the converging point after the visible light correction and the target point are staggered by a certain position through designing the additional mirror, so that the light spot is enlarged, and the observation is facilitated.
In combination with the light focusing principle shown in fig. 5, the types of the applied laser light are different, the relationship between the applied laser light and the visible light focusing position is different, and the correction modes required for the visible light are different. Therefore, the type of additional mirror is provided, taking as an example the action laser light as ultraviolet light or infrared light.
Example 1
As shown in fig. 6, the active laser light is infrared light, and the additional mirror 14 is a negative lens or a negative lens group. As shown in fig. 7, the visible light passing through the last group of positive lenses of the focusing lens has a larger bending angle than the infrared light, and before the laser light is emitted, an additional lens is added behind the positive lens, and the additional lens has negative focal power and has a divergence effect on the light. And the proper negative focal power is designed to move the visible light ray convergence point to coincide with the infrared light ray convergence point when the additional lens is not added. At the moment, the aiming point can be clearly observed through focused visible light, and after aiming, the additional mirror is taken down, so that the infrared laser can be focused to the aiming point.
Example 2
As shown in fig. 8, the applied laser light is ultraviolet light, and the additional mirror 14 is a positive lens or a positive lens group. As shown in fig. 9, the visible light passing through the last group of positive lenses of the focusing lens has a smaller bending angle than the ultraviolet light, and before the laser is applied to emit light, an additional lens is added behind the positive lenses, and the additional lens has positive focal power and has a converging effect on the light. The positive focal power is designed to move the visible light ray convergence point to coincide with the ultraviolet light ray convergence point without the addition of the additional lens. At the moment, the aiming point can be clearly observed through focused visible light, and after aiming, the additional mirror is taken down, so that the ultraviolet laser can be focused on the aiming point.
The use method of the device comprises the following steps:
firstly, according to the target distance, a focusing mirror of the laser is adjusted, so that the focusing point of the focusing mirror meets the requirement of the target distance.
Then, an additional mirror is placed at the light outlet end of the focusing mirror according to the designed distance, the laser is adjusted to be in a visible light output mode, visible indicating light is output, the visible indicating light is focused by the focusing mirror, and then the focusing position is corrected by the additional mirror and is consistent with the focusing position of the acting laser.
And finally, after the target is aimed by the visible indication light, the additional mirror is taken down, the laser is adjusted to be in an action laser output mode, and the action laser is output and focused to the target point through the focusing mirror for operation.

Claims (9)

1. The utility model provides a can realize acting on the long-range focus point of laser and instructing the confocal laser device of removing obstacles of light, includes the laser instrument, the laser output of laser instrument is equipped with focusing mirror, its characterized in that: the laser is internally coupled with visible indicating light; the light outlet end of the focusing mirror is detachably connected with an additional mirror, and the additional mirror and the focusing mirror are coaxially arranged and used for correcting the focusing position of the visible indicating light to the acting laser focusing point of the focusing mirror when the visible indicating light is used for assisting in observing and aiming the target.
2. The device for removing obstacles by laser capable of realizing confocal long-distance focusing of laser and indication light as claimed in claim 1, wherein: and a beam combination coupling structure is arranged in the laser and is used for coupling the action laser and the visible indication light into an optical fiber.
3. The apparatus of claim 1, wherein the apparatus is capable of focusing the laser beam at a distance and the indicating light is confocal, and comprises: when the laser is applied as ultraviolet light, the additional mirror is a positive lens.
4. The device for removing obstacles by laser capable of realizing confocal long-distance focusing of laser and indication light as claimed in claim 1, wherein: when the laser light is applied as infrared light, the additional mirror is a negative lens.
5. The apparatus for removing obstacles by laser capable of realizing confocal far-distance focusing of laser and confocal pointing light according to any one of claims 1 to 4, wherein: the focusing lens comprises a lens group A and a lens group B which are coaxially arranged, wherein the lens group A is close to the output end of the laser, the focal length of the lens group A is adjustable, and the lens group B is fixedly arranged relative to the output end of the laser.
6. The apparatus of claim 5, wherein the apparatus is capable of focusing the laser beam at a distance and the indicating light is confocal, and comprises: the lens group A comprises a first lens and a second lens, the focal length of the first lens is positive, the focal length of the second lens is negative, the absolute value of the focal length of the second lens is larger than that of the focal length of the first lens, the first lens is fixedly arranged relative to the output end of the laser, and the second lens can move back and forth along the direction of an optical axis.
7. The apparatus of claim 6, wherein the apparatus is capable of focusing the laser beam at a distance and the indicating light is confocal, and comprises: the focal length of the lens group B is positive, and the lens group B is a single lens or a combined lens.
8. A method for realizing confocal action of laser long-distance focusing point and indication light by using the laser device as claimed in any one of claims 1-7, characterized in that: adjusting a focusing mirror of the laser according to the distance between the target point and the laser to ensure that the focusing point is on the target point; setting a laser in a visible light output mode, outputting visible indication light, installing an additional mirror at the light outlet end of a focusing mirror according to a designed distance, taking down the additional mirror after observing that a visible light convergence point is aligned with a target point, adjusting the laser in an output action laser mode, outputting action laser, and converging the action laser to the target point for operation.
9. The method of claim 8 for achieving confocal of active laser long range focusing and indicator light, wherein: the distance between the additional mirror and the focusing mirror is determined by at least the wavelength of the applied laser light, the wavelength of the visible indicating light and the parameters of the additional mirror.
CN202210759102.6A 2022-06-30 2022-06-30 Laser obstacle clearing device and method capable of realizing long-distance focusing point of acting laser and confocal of indicating light Pending CN115000875A (en)

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CN202210759102.6A CN115000875A (en) 2022-06-30 2022-06-30 Laser obstacle clearing device and method capable of realizing long-distance focusing point of acting laser and confocal of indicating light

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210759102.6A CN115000875A (en) 2022-06-30 2022-06-30 Laser obstacle clearing device and method capable of realizing long-distance focusing point of acting laser and confocal of indicating light

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CN115000875A true CN115000875A (en) 2022-09-02

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