CN107800032B - Three-path holmium laser - Google Patents
Three-path holmium laser Download PDFInfo
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- CN107800032B CN107800032B CN201711190626.3A CN201711190626A CN107800032B CN 107800032 B CN107800032 B CN 107800032B CN 201711190626 A CN201711190626 A CN 201711190626A CN 107800032 B CN107800032 B CN 107800032B
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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
- H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
- H01S3/08—Construction or shape of optical resonators or components thereof
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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
- H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
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Abstract
The invention discloses a three-path holmium laser, which comprises a machine shell, wherein a fixed plate is arranged in the machine shell, a first holmium laser resonant cavity, a second holmium laser resonant cavity and a third holmium laser resonant cavity are arranged in the fixed plate in a penetrating mode, output mirrors are arranged on one sides of the first holmium laser resonant cavity, the second holmium laser resonant cavity and the third holmium laser resonant cavity, a rotating plate is arranged on the outer wall of each output mirror, and the output mirrors penetrate through the rotating plate and extend to one side of the rotating plate. According to the invention, through the arrangement of the first holmium laser resonant cavity, the second holmium laser resonant cavity and the third holmium laser resonant cavity, laser generated after being electrified is favorably generated, so that the laser is converged, parallel laser is favorably converged together through the arrangement of the condenser lens, so that the light condensation effect is achieved, and through the arrangement of the sliding rod, the sliding rod is favorably slid on the inner wall of the shell, so that the distance between the condenser lens and the rotating plate is controlled, and the effect of controlling the size of the laser is achieved.
Description
Technical Field
The invention relates to the field of resonant cavity structures of laser devices, in particular to a three-way holmium laser.
Background
The holmium laser is a pulse laser made of Cr, Tm, Ho: YAG crystals, the output wavelength of which is 2.1m and is in the absorption peak of water, therefore, the laser has shallow penetration depth to human tissues, high surgical operation precision and safety to eyes, and can be transmitted by optical fibers, so the holmium laser is a good light source for surgery in medical treatment. Therefore, the holmium laser has been widely used in the fields of urology, dermatology, obstetrics and gynecology, gastroenterology, general surgery, and the penta-otology.
The light emitting threshold of the holmium laser is high, and meanwhile, the heat conductivity of the holmium laser crystal is low, so that the holmium laser is low in electro-optical conversion efficiency and low in output power. In order to obtain a holmium laser therapy apparatus with high output power, two or more paths of lasers are often adopted to emit light in turn, and the total output power is improved by combining light paths and coupling the light paths into the same optical fiber. Meanwhile, the photoelectric conversion efficiency of the laser is low, most of input energy is converted into device heat to be dissipated, and the influence of the heating of the laser crystal on the output of the laser is the largest. Therefore, the high-power holmium laser is provided with a refrigerating system, so that the laser crystal works under the low-temperature condition of 2-10 ℃.
It is often all fixed that its sealed resonant cavity that is used for installing the laser instrument of current double-circuit holmium laser instrument is used for, every solitary resonant cavity is all unadjustable, and the laser instrument is a delicate instrument, all can adjust when transport and use, this wherein if having caused the cheap of laser instrument, just then can't continue subsequent use, need with the laser recalibrate just can, sometimes need open sealed resonant cavity and calibrate solitary resonant cavity even, just so troublesome, and if set up the resonant cavity adjustable, then the optics adjustment frame that uses together with the resonant cavity just can't use traditional structure, need redesign.
Therefore, it is necessary to invent a three-way holmium laser to solve the above problems.
Disclosure of Invention
The invention aims to provide a three-way holmium laser to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a three-path holmium laser comprises a machine shell, wherein a fixed plate 2 is arranged in the machine shell 1, a first holmium laser resonant cavity 3, a second holmium laser resonant cavity 4 and a third holmium laser resonant cavity 5 are arranged in the fixed plate 2 in a penetrating manner, output mirrors 6 are arranged on one sides of the first holmium laser resonant cavity 3, the second holmium laser resonant cavity 4 and the third holmium laser resonant cavity 5, a rotating plate 7 is arranged on the outer wall of the output mirror 6, the output mirrors 6 penetrate through the rotating plate 7 and extend to one side of the rotating plate 7, the rotating plate 7 is movably sleeved on the inner wall of the machine shell 1, a rotating rod 8 is fixedly arranged on one side of the rotating plate 7, one end of the rotating rod 8 penetrates through the fixed plate 2 and one side wall of the machine shell 1 and extends to one side wall of the outer wall of the machine shell 1, the rotating rod 8 is movably connected with the fixed plate 2 and one side wall of the machine shell 1, the rotating motor 9 is arranged on one side of the outer wall of the machine shell 1, the other side of the rotating plate 7 is provided with a collecting lens 10, the two ends of the condenser lens 10 are provided with fastening plates 18, one end of the fastening plate 18 is provided with a sliding rod 11, one end of the sliding rod 11 penetrates through the inside of the casing 1, and is connected with the casing 1 in a sliding way, a light guide cone 12 is arranged at the other side of the condenser 10, one end of the light guide cone 12 penetrates through the other side wall of the casing 1, and extends to the other side of the casing 1, one end of the light guide cone 12 is provided with a transmission optical fiber 13, the transmission optical fiber 13 is arranged at one side of the other outer wall of the casing 1, a hydraulic cylinder 14 is arranged at the top end of the machine shell 1, a piston rod 15 is arranged at the bottom end of the hydraulic cylinder 14, one end of the piston rod 15 penetrates through the upper side wall of the machine shell 1, and extend to one side of the inner wall of the machine shell 1, the other end of the piston rod 15 is provided with a telescopic rod 16, and one end of the telescopic rod 16 is fixedly connected with one side surface of the sliding rod 11.
Preferably, a leakage-proof pad is arranged in a gap between the rotating plate and the casing in a surrounding manner.
Preferably, a first groove is formed in one end of the sliding rod inwards, one end of the fastening plate is arranged in the first groove, threaded holes are formed in two side walls of the first groove and in the fastening plate, threaded rods are arranged in the threaded holes, one end of each threaded rod is provided with a nut, and the nuts are arranged on one side of the outer wall of the sliding rod.
Preferably, the inner wall of the casing is provided with a second groove, one end of the sliding rod is provided with a sliding plate, the sliding plate is arranged in the second groove, one side wall of the second groove is provided with a semi-sliding ball, and the semi-sliding ball is arranged on one side of the sliding plate.
Preferably, the first holmium laser resonant cavity, the second holmium laser resonant cavity and the third holmium laser resonant cavity which are arranged in the fixed plate are arranged in an equilateral triangle shape, the number of the output mirrors is 6, the output mirrors are distributed in an array manner around the rotating rod, and the first holmium laser resonant cavity, the second holmium laser resonant cavity and the third holmium laser resonant cavity are matched with three output mirrors at intervals.
Preferably, an external power supply is arranged on one side of the casing, and the first holmium laser resonant cavity, the second holmium laser resonant cavity, the third holmium laser resonant cavity and the rotating motor are electrically connected with the external power supply.
Preferably, a control switch is arranged on one side of the casing, the control switch is electrically connected with the first holmium laser resonant cavity, the second holmium laser resonant cavity, the third holmium laser resonant cavity, the hydraulic cylinder and the rotating motor, a liquid crystal display screen is arranged on the surface of one side of the control switch, and a control button is arranged at the bottom end of the liquid crystal display screen.
Preferably, the condenser material sets up to transparent glass material, condenser one end sets up to the hemisphere, the condenser other end sets up to the cuboid, hemisphere and cuboid are the integration setting.
The invention has the technical effects and advantages that: through the arrangement of the first holmium laser resonant cavity, the second holmium laser resonant cavity and the third holmium laser resonant cavity, laser is favorably generated after power is on, so that the laser is converged, a laser transmission channel is favorably provided through the arrangement of the output mirror, the rotating plate is prevented from blocking the transmission of the laser and being unfavorable for the transmission of the laser, the output mirror on the rotating plate is favorably driven to rotate when the rotating plate is rotated through the arrangement of the rotating plate, so that different output mirrors are regulated and controlled to be matched with the first holmium laser resonant cavity, the second holmium laser resonant cavity and the third holmium laser resonant cavity, the rotating plate is favorably driven to rotate through the arrangement of the rotating rod, parallel lasers are favorably converged together through the arrangement of the collecting lens, thereby achieving the effect of light condensation, and the sliding rod is favorably slid on the inner wall of the shell through the arrangement of the sliding rod, so as to control the distance between the collecting lens and the rotating plate, thereby achieving the effect of controlling the size of the laser.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
Fig. 2 is a middle sectional view of the present invention.
Fig. 3 is an enlarged schematic view of a portion a in fig. 1 according to the present invention.
Fig. 4 is a schematic view of the sliding connection structure of the present invention.
Fig. 5 is a schematic view of a condenser lens according to the present invention.
In the figure: the device comprises a machine shell 1, a fixed plate 2, a first holmium laser resonant cavity 3, a second holmium laser resonant cavity 4, a third holmium laser resonant cavity 5, an output mirror 6, a rotating plate 7, a rotating rod 8, a rotating motor 9, a collecting mirror 10, a sliding rod 11, a light guide cone 12, a transmission optical fiber 13, a hydraulic cylinder 14, a piston rod 15, a telescopic rod 16, a leakage-proof pad 17, a fastening plate 18, a first groove 19, a threaded rod 20, a nut 21, a second groove 22 and a sliding plate 23.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
According to the three-path holmium laser shown in fig. 1, a fixed plate 2 is arranged in a casing 1, a first holmium laser resonator 3, a second holmium laser resonator 4 and a third holmium laser resonator 5 are arranged in the fixed plate 2 in a penetrating manner, laser generated after power is on is facilitated to converge through the arrangement of the first holmium laser resonator 3, the second holmium laser resonator 4 and the third holmium laser resonator 5, output mirrors 6 are arranged on one sides of the holmium laser resonator 3, the second holmium laser resonator 4 and the third holmium laser resonator 5, a passage for laser transmission is facilitated to be provided through the arrangement of the output mirrors 6, the rotation plate 7 is prevented from blocking the transmission of the laser, the transmission of the laser is not facilitated, a rotation plate 7 is arranged on the outer wall of the output mirror 6, and the arrangement of the rotation plate 7 is beneficial to drive the output mirrors 6 on the rotation plate 7 to rotate when the rotation plate 7 is rotated, thereby regulating and controlling different output mirrors 6 to be matched with the first holmium laser resonant cavity 3, the second holmium laser resonant cavity 4 and the third holmium laser resonant cavity 5, wherein the output mirrors 6 penetrate through the rotating plate 7 and extend to one side of the rotating plate 7, the rotating plate 7 is movably sleeved on the inner wall of the casing 1, one side of the rotating plate 7 is fixedly provided with a rotating rod 8 which is favorable for driving the rotating plate 7 to rotate through the arrangement of the rotating rod 8, one end of the rotating rod 8 penetrates through one side wall of the fixed plate 2 and the casing 1 and extends to one side of the outer wall of the casing 1, the rotating rod 8 is movably connected with the fixed plate 2 and one side wall of the casing 1, one side of the rotating rod 8 is provided with a rotating motor 9, the rotating motor 9 is arranged on one side of the outer wall of the casing 1, the other side of the rotating plate 7 is provided with a collecting mirror 10 which is favorable for collecting parallel lasers together through the arrangement, the two ends of the condenser 10 are provided with sliding rods 11, the sliding rods 11 are arranged to facilitate the sliding of the sliding rods 11 on the inner wall of the casing 1, so as to control the distance between the condenser 10 and the rotating plate 7, thereby achieving the effect of controlling the size of laser, one end of each sliding rod 11 penetrates through the inside of the casing 1 and is slidably connected with the casing 1, the other side of the condenser 10 is provided with a light guide cone 12, one end of the light guide cone 12 penetrates through the other side wall of the casing 1 and extends to the other side of the casing 1, one end of the light guide cone 12 is provided with a transmission optical fiber 13, the transmission optical fiber 13 is arranged on one side of the other outer wall of the casing 1, the top end of the casing 1 is provided with a hydraulic cylinder 14, the bottom end of the hydraulic cylinder 14 is provided with a piston rod 15, the bottom end of the piston rod 15 penetrates through one, one end of the telescopic rod 16 is fixedly connected with one side surface of the sliding rod 11.
According to a three routes holmium laser that fig. 2 shows, the clearance that commentaries on classics board 7 and casing 1 are connected is surrounded and is provided with leak protection pad 17, through the setting of leak protection pad 17, is favorable to providing sealed environment, prevents that external impurity from getting into in the casing 1, produces the influence to laser, commentaries on classics board 7 one side is provided with output mirror 6, output mirror 6 runs through commentaries on classics board 7, and extends to commentaries on classics board 7 one side, output mirror 6 is provided with 6, and is the array distribution around bull stick 8, is favorable to changeing different output mirrors 6 and carries out the transmission to laser.
According to the three-way holmium laser shown in fig. 3, a first groove 19 is formed in one end of the sliding rod 11, one end of the fastening plate 18 is arranged in the first groove 19, threaded holes are formed in two side walls of the first groove 19 and the fastening plate 18, a threaded rod 20 is arranged in each threaded hole, a nut 21 is arranged at one end of the threaded rod 20, the nut 21 is arranged on one side of the outer wall of the sliding rod 11, the fastening effect on the condenser 10 is facilitated, and the condenser 10 is prevented from falling off during operation.
According to the three-way holmium laser shown in fig. 4, a second groove 22 is formed in the inner wall of the case 1, a sliding plate 23 is arranged at one end of the sliding rod 11, the sliding plate 23 is arranged in the second groove 22, a semi-sliding ball is arranged on one side wall of the second groove 22, and the semi-sliding ball is arranged on one side of the sliding plate 23, so that the friction force between the sliding plate 23 and the case 1 is reduced.
According to the three routes holmium laser that fig. 5 shows, condenser 10 both ends are provided with mounting plate 18, condenser 10 material sets up to transparent glass material, condenser 10 one end sets up to the hemispheroid, condenser 10 one end sets up to the cuboid, hemispheroid and cuboid are the integration setting, are favorable to with the laser of parallel, reach the effect of assembling a bit through condenser 10.
The working principle of the invention is as follows: when the holmium laser resonator is used, a switch button on a control switch is pressed, the first holmium laser resonator 3, the second holmium laser resonator 4 and the third holmium laser resonator 5 emit laser, the laser is transmitted to a condenser 10 through an output mirror 6, the laser is converged to one point and transmitted into a light guide cone 12 through the principle of condensing of the condenser 10, and finally transmitted out through a transmission optical fiber 13, in the working process, a rotating motor 9 is rotated by pressing a rotating motor button on the control switch, a rotating rod 8 is driven to rotate through the rotating motor 9, so that a rotating plate 7 is driven to rotate, the rotation of the output mirror 6 is controlled, and whether the first holmium laser resonator 3, the second holmium laser resonator 4 and the third holmium laser resonator 5 are matched with the output mirror 6 or not is observed through a liquid crystal display screen on the control switch while the output mirror 6 rotates, and according to the intensity of the required laser, the position relation of the condensing lens 10 and the output lens 6 is controlled by pressing a button of a hydraulic cylinder 14 on a control switch and driving the condensing lens 10 to move in the shell 1 through an expansion link 16, so that an efficient condensing effect is achieved, the laser generated after being electrified is facilitated through the arrangement of the first holmium laser resonant cavity 3, the second holmium laser resonant cavity 4 and the third holmium laser resonant cavity 5, so that the laser is converged, a laser transmission channel is facilitated to be provided through the arrangement of the output lens 6, the blocking of the laser transmission by the rotating plate 7 is prevented, the transmission of the laser is not facilitated, the output lens 6 on the rotating plate 7 is facilitated to be driven to rotate through the arrangement of the rotating plate 7, so that different output lenses 6 are regulated and controlled to be matched with the first holmium laser resonant cavity 3, the second holmium laser resonant cavity 4 and the third holmium laser resonant cavity 5, and through the arrangement of the rotating rod 8, the rotating plate 7 can be driven to rotate, parallel laser beams can be gathered together through the arrangement of the light collecting mirror 10, so that the light collecting effect is achieved, the sliding rod 11 can slide on the inner wall of the shell 1 through the arrangement of the sliding rod 11, so that the distance between the light collecting mirror 10 and the rotating plate 7 is controlled, the effect of controlling the size of the laser beams is achieved, and the purpose of the invention is achieved.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.
Claims (8)
1. A three-way holmium laser, includes casing (1), its characterized in that: a fixed plate (2) is arranged in the casing (1), a first holmium laser resonant cavity (3), a second holmium laser resonant cavity (4) and a third holmium laser resonant cavity (5) are arranged in the fixed plate (2) in a penetrating manner, output mirrors (6) are arranged on one sides of the first holmium laser resonant cavity (3), the second holmium laser resonant cavity (4) and the third holmium laser resonant cavity (5), a rotating plate (7) is arranged on the outer wall of the output mirror (6), the output mirrors (6) penetrate through the rotating plate (7) and extend to one side of the rotating plate (7), the rotating plate (7) is movably sleeved on the inner wall of the casing (1), a rotating rod (8) is fixedly arranged on one side of the rotating plate (7), one end of the rotating rod (8) penetrates through one side wall of the fixed plate (2) and the casing (1) and extends to one side wall of the outer wall of the casing (1), and the rotating rod (8) is movably connected with the fixed plate (2) and one side wall of the casing (1, the light guide device is characterized in that a rotating motor (9) is arranged on one side of the rotating rod (8), the rotating motor (9) is arranged on one side of the outer wall of the casing (1), a collecting lens (10) is arranged on the other side of the rotating plate (7), fastening plates (18) are arranged on two ends of the collecting lens (10), a sliding rod (11) is arranged at one end of each fastening plate (18), one end of each sliding rod (11) penetrates through the inside of the casing (1) and is in sliding connection with the casing (1), a light guide cone (12) is arranged on the other side of the collecting lens (10), one end of each light guide cone (12) penetrates through the other side wall of the casing (1) and extends to the other side of the casing (1), a transmission optical fiber (13) is arranged at one end of each light guide cone (12), the transmission optical fiber (13) is arranged on one side of the other outer wall of the casing (1), a hydraulic cylinder, piston rod (15) one end runs through side wall on casing (1), and extends to casing (1) inner wall one side, the piston rod (15) other end is provided with telescopic link (16), telescopic link (16) one end and slide bar (11) a side fixed connection.
2. The three-way holmium laser of claim 1, characterized in that: the gap between the rotating plate (7) and the casing (1) is provided with a leakage-proof pad (17) in a surrounding way.
3. The three-way holmium laser of claim 1, characterized in that: slide bar (11) one end is inwards provided with first recess (19), mounting plate (18) one end sets up in first recess (19), all be provided with the screw hole in first recess (19) both sides wall and mounting plate (18), threaded hole is provided with threaded rod (20), threaded rod (20) one end is provided with nut (21), nut (21) set up in slide bar (11) outer wall one side.
4. The three-way holmium laser of claim 1, characterized in that: the inner wall of the machine shell (1) is provided with a second groove (22), one end of the sliding rod (11) is provided with a sliding plate (23), the sliding plate (23) is arranged in the second groove (22), one side wall of the second groove (22) is provided with a semi-sliding ball, and the semi-sliding ball is arranged on one side of the sliding plate (23).
5. The three-way holmium laser of claim 1, characterized in that: first holmium laser resonator (3), second holmium laser resonator (4) and third holmium laser resonator (5) that set up in fixed plate (2) are equilateral triangle and set up, output mirror (6) are provided with 6, and are the array distribution around bull stick (8), first holmium laser resonator (3), second holmium laser resonator (4) and third holmium laser resonator (5) and every three looks spaced output mirror (6) phase-match.
6. The three-way holmium laser of claim 1, characterized in that: an external power supply is arranged on one side of the machine shell (1), and the first holmium laser resonant cavity (3), the second holmium laser resonant cavity (4), the third holmium laser resonant cavity (5) and the rotating motor (9) are electrically connected with the external power supply.
7. The three-way holmium laser of claim 1, characterized in that: the laser device is characterized in that a control switch is arranged on one side of the machine shell (1), the control switch is electrically connected with the first holmium laser resonant cavity (3), the second holmium laser resonant cavity (4), the third holmium laser resonant cavity (5), the hydraulic cylinder (14) and the rotating motor (9), a liquid crystal display screen is arranged on the surface of one side of the control switch, and a control button is arranged at the bottom end of the liquid crystal display screen.
8. The three-way holmium laser of claim 1, characterized in that: the collecting lens (10) material sets up to transparent glass material, collecting lens (10) one end sets up to the hemisphere, collecting lens (10) other end sets up to the cuboid, hemisphere and cuboid are the integration setting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711190626.3A CN107800032B (en) | 2017-11-24 | 2017-11-24 | Three-path holmium laser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711190626.3A CN107800032B (en) | 2017-11-24 | 2017-11-24 | Three-path holmium laser |
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| Publication Number | Publication Date |
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| CN107800032A CN107800032A (en) | 2018-03-13 |
| CN107800032B true CN107800032B (en) | 2020-06-09 |
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| CN201711190626.3A Active CN107800032B (en) | 2017-11-24 | 2017-11-24 | Three-path holmium laser |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108721789A (en) * | 2018-05-31 | 2018-11-02 | 合肥大族科瑞达激光设备有限公司 | A kind of co-operating therapeutic equipment of multi-wavelength Bladder stone |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201001770Y (en) * | 2007-02-09 | 2008-01-09 | 无锡市大华激光设备有限公司 | Medical binuclear holmium laser therapeutic machine |
| US7796671B2 (en) * | 2008-03-31 | 2010-09-14 | Electro Scientific Industries, Inc. | Multi-pass optical power amplifier |
| CN201185965Y (en) * | 2008-04-16 | 2009-01-28 | 广州市普东光电科技有限公司 | Modified type medical holmium laser with sealing structure |
| CN202059047U (en) * | 2011-03-02 | 2011-11-30 | 无锡市大华激光设备有限公司 | Tetra-core holmium laser generation system |
| CN204577829U (en) * | 2015-02-13 | 2015-08-19 | 合肥大族科瑞达激光设备有限公司 | One four cavity space No. four holmium lasers |
| CN204577824U (en) * | 2015-04-08 | 2015-08-19 | 广州市普东光电科技有限公司 | Reduced form double-channel holmium laser resonance annular seal space structure |
| CN205004613U (en) * | 2015-09-10 | 2016-01-27 | 广州市普东医疗科技有限公司 | Brief four ways holmium laser |
| CN205004612U (en) * | 2015-09-10 | 2016-01-27 | 广州市普东医疗科技有限公司 | Brief three routes holmium laser |
| CN205665469U (en) * | 2016-05-29 | 2016-10-26 | 深圳市万福昌科技有限公司 | Ultraviolet laser beam shaping device |
| CN206193244U (en) * | 2016-11-25 | 2017-05-24 | 淮阴师范学院 | Adjustable laser rangefinder suitable for many dirt |
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