CN112068297A - Folding optical fiber laser emitting device - Google Patents
Folding optical fiber laser emitting device Download PDFInfo
- Publication number
- CN112068297A CN112068297A CN202011001935.3A CN202011001935A CN112068297A CN 112068297 A CN112068297 A CN 112068297A CN 202011001935 A CN202011001935 A CN 202011001935A CN 112068297 A CN112068297 A CN 112068297A
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- Prior art keywords
- folding
- qbh
- reflection
- reflector
- laser
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B17/00—Systems with reflecting surfaces, with or without refracting elements
- G02B17/02—Catoptric systems, e.g. image erecting and reversing system
- G02B17/06—Catoptric systems, e.g. image erecting and reversing system using mirrors only, i.e. having only one curved mirror
- G02B17/0668—Catoptric systems, e.g. image erecting and reversing system using mirrors only, i.e. having only one curved mirror having non-imaging properties
- G02B17/0673—Catoptric systems, e.g. image erecting and reversing system using mirrors only, i.e. having only one curved mirror having non-imaging properties for light condensing, e.g. for use with a light emitter
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D5/00—Safety arrangements
- F42D5/04—Rendering explosive charges harmless, e.g. destroying ammunition; Rendering detonation of explosive charges harmless
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- 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
- G02B27/09—Beam shaping, e.g. changing the cross-sectional area, not otherwise provided for
- G02B27/0938—Using specific optical elements
- G02B27/0977—Reflective elements
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Optical Couplings Of Light Guides (AREA)
Abstract
The invention discloses a folding fiber laser emitting device, comprising: the QBH fiber head is used for emitting laser, one surface of the light path reflection box is provided with a light inlet and a light outlet which are arranged in parallel up and down, the QBH fiber head is arranged on the light inlet, the incident surface of the first reflector faces the laser emission end of the QBH fiber head, the reflecting surface of the first reflector faces the incident surface of the second reflector, the reflecting surface of the second reflector faces the light outlet, and the focusing lens is positioned between the second reflector and the light outlet; the folded structure is adopted to increase the focal length of the lens and effectively compress the divergence angle of the emergent Gaussian beam, so that the power density of the target laser is improved; meanwhile, the length of the folding reflection box is reduced due to the design of the folding light path, and the folding reflection box is convenient to carry and use. The problem of QBH fiber optic head influence operator's sight is solved, and operator can be unobstructed near optics sight eyepiece with the eye and aim at.
Description
Technical Field
The invention relates to the field of laser explosion-removing devices, in particular to a folding type optical fiber laser emitting device.
Background
The main principle of laser explosive-removal is that high-energy laser beams generated by a fiber laser are irradiated onto an explosive-removal target (such as a mine), and the laser beams interact with a surface shell of the explosive-removal target on one hand to ablate or disintegrate the shell; in addition, the shell absorbs and conducts heat to heat the explosive in the explosive-removal target, so that the temperature rise, thermal decomposition, deflagration, even detonation and the like of the explosive are caused, and the two aspects are combined to finally cause the failure of the explosive-removal target.
As a remote contactless explosive ordnance disposal mode, the laser explosive ordnance disposal compares traditional explosive ordnance disposal mode, and its advantage mainly has: 1. the working distance of laser explosive disposal is long, and the explosive disposal work can be completed generally hundreds of meters; 2. the laser explosive-removing can remove various targets such as general mines, intelligent mines, various shells and bombs; 3. the laser explosion venting can complete explosion venting work without using explosives, so that collateral damage is small, and the cost of explosion venting is lower than that of the traditional method; 4. the laser explosion-removing device can be conveniently installed on various ground vehicle platforms, and the flexibility of use is strong.
The problem that present laser explosive disposal device exists is that the laser power density to target object department is not enough to optic fibre laser emission device's length is longer, is unfavorable for the transportation, places and field installation uses, and the laser of current laser emission device all is that one end inserts optic fibre QBH joint in addition, and the other end opening jets out laser, and the operator stands and can receive optic fibre QBH joint and rather than the influence of the armor optic fibre of being connected when aiming at laser emission device's one end, is unfavorable for aiming.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides a folding type optical fiber laser emitting device which can improve the laser power density and reduce the whole length, and meanwhile, the aim of an operator is not influenced.
According to an embodiment of the present invention, a folded optical fiber laser emitting device includes:
the QBH optical fiber head is used for emitting laser; the foldable reflection box is characterized in that one surface of the light path reflection box is provided with a light inlet and a light outlet which are parallel up and down, the QBH fiber head is installed on the light inlet, a first reflection mirror parallel to the light inlet, a second reflection mirror parallel to the light outlet and a focusing lens are arranged in the light path reflection box, the incident surface of the first reflection mirror faces the laser emission end of the QBH fiber head, the reflection surface of the first reflection mirror faces the incident surface of the second reflection mirror, the reflection surface of the second reflection mirror faces the light outlet, and the focusing lens is positioned between the second reflection mirror and the light outlet; the sighting device is installed on the top of the folding reflection box.
The folding type optical fiber laser emitting device provided by the embodiment of the invention at least has the following technical effects: according to the embodiment of the invention, the first reflector and the second reflector form a folding light path in the folding reflection box, so that the focal length of the lens is lengthened, the divergence angle of the emitted Gaussian beam can be effectively compressed by increasing the focal length of the lens, and the laser power density at the target position is improved; meanwhile, the design of the folding light path not only increases the focal length of the lens, but also can reduce the length of the whole equipment, and is convenient to carry and use.
In addition, the light inlet for installing the QBH optical fiber head and the light outlet for emitting the Gaussian beam are arranged on the same surface of the folding reflection box, so that the problem that the QBH optical fiber head affects the aiming of an operator is solved, and the operator can aim by approaching an ocular sight to an ocular sight without hindrance.
According to some embodiments of the invention, the QBH fiber head of the folding fiber laser emitting device is provided with an adjusting knob for adjusting the light emitting surface.
According to some embodiments of the present invention, the folded fiber laser emitting device is provided with an angle adjusting device at each of the ends of the first mirror and the second mirror for adjusting the tilt angle.
According to some embodiments of the invention, the angle adjusting device is a rotating shaft.
According to some embodiments of the invention, the first reflector and the second reflector are all silvered total reflection mirrors.
According to some embodiments of the invention, the foldable fiber laser emitting device is provided with a telephoto lens at the front end of the sighting telescope, a direction regulator at the bottom of the sighting telescope, and an eyepiece at the rear end of the sighting telescope.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic structural diagram of a folded fiber laser transmitter according to an embodiment of the present invention;
FIG. 2 is an overall optical path diagram of a folded fiber laser transmitter according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a QBH fiber optic head in an embodiment of the present invention;
fig. 4 is a schematic diagram of the optical path of a gaussian beam through the focal length of a lens.
Reference numerals
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
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, but 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, 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, a folded fiber laser transmitter includes: a QBH fiber head 100 emitting a Gaussian beam, a folding reflection box 200 and an aiming tool 300.
The light inlet 210 is formed below the left end face of the folding reflection box 200, the light outlet 220 is formed above the light inlet 210, the QBH optical fiber head 100 extends into the light inlet 210 so as to inject a gaussian beam into the folding reflection box 200, a first reflecting mirror 230, a second reflecting mirror 240 and a focusing lens 250 are arranged in the folding reflection box 200, the first reflecting mirror 230 is located at the right end of the folding reflection box 200, the second reflecting mirror 240 is located right above the first reflecting mirror 230, the incident surface of the first reflecting mirror 230 faces the laser emission end of the QBH optical fiber head 100, the reflecting surface of the first reflecting mirror 230 faces the incident surface of the second reflecting mirror 240, the reflecting surface of the second reflecting mirror 240 faces the light outlet 220, and the focusing lens 250 is located between the second reflecting mirror 240 and the light outlet 220.
Referring to fig. 4, the principle of optical path design in this embodiment is: the Gaussian beam generated by the high-energy fiber laser is output to the thin convex lens through the QBH, the output beam passing through the thin convex lens is still the Gaussian beam, the beam waist and the divergence angle of the output beam are changed, and the beam waist position l of the output Gaussian beam is input1、l2Focal length f of lens, waist radius omega01、ω02The relationship between them is as follows:
thus omega02The larger the output beam divergence angle θ02The smaller. By calculation, ω02The increase in (f) is strongly (sensitively) correlated with the f, and an effective way to compress the divergence angle is to increase the focal length of the lens.
Referring to fig. 2, in order to increase the focal length of the lens without increasing the overall length of the device, the embodiment of the invention realizes a compact gun head structure of a long-focus focusing lens 250 by forming a folded optical path by a first reflecting mirror 230 and a second reflecting mirror 2403The distance of the exit beam waist, l, of the focusing lens 2504The structure can compress the divergence angle of the emergent Gaussian beam to the maximum extent for the distance, thereby realizing the maximum value of the laser power density at the target.
In this embodiment, the focusing lens 250 is a single thin convex lens formed by plating an antireflection film with a high transmittance material, and the single thin convex lens converts and emits the gaussian beam output by the fiber laser, so that the optical path is stable and simple, and the system cost can be reduced.
Preferably, the first reflector 230 and the second reflector 240 are all silver-plated total reflectors, and the reflectivity of the silver-plated total reflectors to laser with working wavelength is greater than 99.5%, so that the laser carrying capacity of the emitting device is effectively improved.
In order to realize the adjustable inclination, the ends of the first reflecting mirror 230 and the second reflecting mirror 240 are provided with angle adjusting devices, preferably, the angle adjusting devices are rotating shafts 260, and the first reflecting mirror 230 and the second reflecting mirror 240 may be respectively connected with one rotating shaft so as to enable the relative angle to be adjustable, or may be arranged on one rotating shaft at a relatively fixed angle, so as to only adjust the angle of the reflected gaussian beam.
The top at folding reflection case 200 is installed to sight 300, aim for better, the front end of sight 300 is provided with the long-focus lens, the long-focus lens can make holistic magnification improve more than 10 times, can treat to destroy the clear formation of image of target to the distant place, the bottom of sight 300 is provided with direction regulator 310, it is adjusted with the pitch direction to make to aim 300 utensil, the rear end of sight 300 is provided with eyepiece 320, be provided with the cross hair on the eyepiece 320, can make laser output, aim the cross hair and intersect in target department, realize long-distance accurate aiming, it can to treat to destroy target department laser facula position image and aim the coincidence of cross hair to make the distant place during use.
Referring to fig. 3, an adjusting sleeve 110 is disposed outside the QBH optical fiber head 100 to adjust the front and rear positions of the QBH optical fiber head 100, the adjusting sleeve 110 adopts an outer barrel rotation adjusting mode with scales, and a locking positioning screw is provided to finely adjust the focal point of the focusing lens 250 on the QBH light emitting surface, so as to realize the minimum far light spot.
In summary, in the embodiment of the present invention, the light inlet 210 for installing the QBH fiber head 100 and the light outlet 220 for emitting the gaussian beam are disposed on the same surface of the folding reflection box 200, so as to solve the problem that the QBH fiber head 100 affects the aiming of the operator, and the operator can aim at the eyepiece of the optical sighting device with the eye without hindrance.
A folding light path is formed in the folding reflection box 200 through the first reflection mirror 230 and the second reflection mirror 240, so that the focal length of the lens is effectively lengthened, and the divergence angle of output laser is reduced; meanwhile, the length of the folding reflection box 200 is reduced due to the design of the folding light path, and the folding reflection box is convenient to carry and use.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.
Claims (6)
1. A folded fiber laser emitting device, comprising:
a QBH fiber head (100), the QBH fiber head (100) being used for emitting Gaussian beams;
a folding reflection box (200), one side of the folding reflection box (200) is provided with a light inlet (210) and a light outlet (220) which are vertically parallel, the QBH fiber head (100) is installed on the light inlet (210), a first reflection mirror (230) parallel to the light inlet (210), a second reflection mirror (240) parallel to the light outlet (220) and a focusing lens (250) are arranged in the folding reflection box (200), an incident surface of the first reflection mirror (230) faces an emission end of the QBH fiber head (100), a reflection surface of the first reflection mirror (230) faces an incident surface of the second reflection mirror (240), a reflection surface of the second reflection mirror (240) faces the light outlet (220), and the focusing lens (250) is located between the second reflection mirror (240) and the light outlet (220);
an aimer (300), said aimer (300) mounted on top of said folding reflector box (200).
2. The folded fiber laser transmitter of claim 1, wherein: an adjusting sleeve (110) is arranged outside the QBH optical fiber head (100) and used for adjusting the front and back positions of the QBH optical fiber head (100).
3. The folded fiber laser transmitter of claim 1, wherein: the ends of the first mirror (230) and the second mirror (240) are each provided with an angle adjusting device for adjusting the tilt angle.
4. The folded fiber laser transmitter of claim 3, wherein: the angle adjusting device is a rotating shaft (260).
5. The folded fiber laser transmitter of claim 1, wherein: the first reflector (230) and the second reflector (240) are all silvered total reflectors.
6. The folded fiber laser transmitter of claim 1, wherein: the front end of the sighting telescope (300) is provided with a telephoto lens, the bottom of the sighting telescope (300) is provided with a direction regulator (310), and the rear end of the sighting telescope (300) is provided with an eyepiece (320).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011001935.3A CN112068297A (en) | 2020-09-22 | 2020-09-22 | Folding optical fiber laser emitting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011001935.3A CN112068297A (en) | 2020-09-22 | 2020-09-22 | Folding optical fiber laser emitting device |
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| Publication Number | Publication Date |
|---|---|
| CN112068297A true CN112068297A (en) | 2020-12-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011001935.3A Pending CN112068297A (en) | 2020-09-22 | 2020-09-22 | Folding optical fiber laser emitting device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114859567A (en) * | 2022-06-02 | 2022-08-05 | 中国科学院苏州生物医学工程技术研究所 | Laser beam combination coupling device |
-
2020
- 2020-09-22 CN CN202011001935.3A patent/CN112068297A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114859567A (en) * | 2022-06-02 | 2022-08-05 | 中国科学院苏州生物医学工程技术研究所 | Laser beam combination coupling device |
| CN114859567B (en) * | 2022-06-02 | 2023-11-03 | 中国科学院苏州生物医学工程技术研究所 | Laser beam combining coupling device |
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