CN217956530U - Laser obstacle removing device for realizing action of laser long-distance focusing point and indication light confocal - Google Patents

Abstract

The utility model relates to a laser instrument technical field especially relates to a realize acting on the long distance focus point of laser and instructing the confocal laser device of removing obstacles of 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 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. The utility model discloses consider the different problems of convergent point that leads to of visible indicator light sum effect laser wavelength difference, through increase additional mirror outside laser instrument focusing mirror, adjust the convergent point of visible indicator light to with effect laser focusing point same position to reach the effect of clear instruction target.

Description

Laser obstacle removing device for realizing action of laser long-distance focusing point and indication light confocal

Technical Field

The utility model relates to a laser instrument technical field especially relates to a realize acting on the long distance focus point of laser and instructing the confocal laser device of removing obstacles of light.

Background

In the process of power equipment inspection, a high-power laser obstacle clearing device capable of performing remote 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 arranges a beam combining structure behind a focusing lens and combines the beam of coaxial visible laser for indication. 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 problem, the utility model provides a laser device of removing obstacles through increasing additional mirror, adjusts the focus point of visible indicator light, revises the focus position of visible indicator light to the target point on to reach the effect of clear instruction target.

The technical scheme of the utility model as follows:

a laser obstacle clearing device for realizing confocal action of a laser remote focusing point and indicating light comprises a laser, wherein a laser output end of the laser is provided with a focusing lens, 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 utility model discloses add additional mirror outside the focusing mirror of laser barrier removing device, when using the visible indication light to instruct, revise the focus point of visible indication light, adjust the convergent point of visible indication light to the position the same with the focus that acts on laser to see clearly and aim the position.

Furthermore, be equipped with in the laser instrument and close a bundle coupling structure for in will acting on laser and visible indicating light coupling to an optic fibre, all light beams are all exported through same optic fibre by the laser instrument like this, and this kind of structural coaxiality is strong, compares rearmounted a bundle structural style moreover, and is more stable.

The action laser of the laser can be set to be infrared light or ultraviolet light, and because the focus of the infrared light and the ultraviolet light focused through the focusing mirror is different from the front and back positions of the focusing position of the visible indication light, 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 a 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, when 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, and equivalently, the object distance from the lens group B is reduced, 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 utility model has the advantages that:

1. the utility model discloses the utilization closes and restraints coupling structure earlier with output in visible indicating light and effect laser coupling to an optic fibre, through focusing mirror focus again, but the axiality of fully guarantee visible indicating light and effect laser ensures that the target can accurately be instructed to visible indicating light ability.

2. The utility model discloses consider the different problems of convergent point that leads to of visible indication light sum effect laser wavelength, through increase additional mirror outside laser instrument focusing mirror, adjust the convergent point of visible indication light to with effect laser focusing point same position to reach the effect of clear instruction target.

3. The utility model discloses improve focusing mirror simultaneously, changed the mode of traditional collimation scheme, also be a simple structure's dynamic focusing mirror simultaneously, through the lens compound mode of rational arrangement focusing mirror to only set up the middle lens and can remove, realize the adjustment to focusing mirror focus, simplified focusing mirror's structure, conveniently realize the operation of farther distance simultaneously.

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 structural diagram of the laser according to the present invention;

fig. 4 is a schematic structural diagram of the focusing mirror of 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 diagram of embodiment 1 of the present invention;

fig. 7 is a schematic diagram of the optical path of 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 of 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, and 15, a light path of ultraviolet light without the additional mirror.

Detailed Description

The following describes embodiments of the present invention in detail with reference to the accompanying 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 output by the action laser light sources and visible indication light output by the visible indication light source are coupled by the beam combination coupling structure, then are input into a subsequent structure through the same optical fiber and finally are output through the same laser output end, or are directly output after being coupled, 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 utility model designs a novel focusing mirror structure, can realize remote dynamic focusing, and concrete structure is as follows:

the focusing mirror comprises a lens group A8 and a lens group B11 which are coaxially arranged in sequence along the direction of a light path, and the lens group A is close to the laser output end. The lens group A8 is a combined 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 greater 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 second lens 10 can move back and forth along the optical axis relative to the position of the laser output end, the focal length of the lens group A can be adjusted by moving the second lens, so that light emitted by the light source has different divergence angles after passing through the lens group A, the divergence angles are equal to the object distance of the lens group B, and the focusing at different distances is realized.

When focusing is performed by using the focusing lens, because the refractive indexes of lights with different wavelengths in the focusing lens are different, the focuses focused by the focusing lens are also different, as shown in fig. 5, taking common ultraviolet light, infrared light and visible light as an example, the three lights are incident on the 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 more, and the convergence 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 utility model 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 corrected by the visible light can be staggered with the target point by designing the additional mirror to a certain position, so that the 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 with the visible light focusing position is different, and the correction mode required for the visible light is different. Therefore, the type of additional mirror is provided, taking as an example the action laser 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 without 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 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 lens is placed at the light outlet end of the focusing lens 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 through the focusing lens, and then the focusing position is corrected through the additional lens 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 (7)

1. The utility model provides a 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 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.

2. The apparatus for removing obstacles by laser for realizing confocal far-distance focusing of active laser and confocal pointing light according to 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 for removing obstacles by laser for realizing confocal far-distance focusing of active laser and confocal pointing light according to claim 1, wherein: when the laser is applied as ultraviolet light, the additional mirror is a positive lens.

4. The apparatus for removing obstacles by laser for realizing confocal far-distance focusing of active laser and confocal pointing light according to 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 to achieve confocal long-distance focusing of active 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 device for clearing obstacles by laser for realizing confocal far-distance focusing point and indication light of action laser according to claim 5, is characterized in that: 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 for removing obstacles by laser for realizing confocal far-distance focusing of active laser and confocal pointing light according to claim 6, wherein: the focal length of the lens group B is positive, and the lens group B is a single lens or a combined lens.

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