A high-power laser long-distance transmission device and its long-distance transmission method

Abstract

The present invention discloses a high-power laser long-distance transmission device, which includes a round-trip transmission mirror group composed of an even number of mirror pairs arranged in correspondence with each other. Each mirror is arranged on a base through a two-dimensionally adjustable mirror clamping device. By adjusting the angle of the mirror clamping device, the round-trip transmission of high-power laser within the round-trip transmission mirror group is achieved. Among them, the mirror is coated with a high-power dielectric film with a reflectivity greater than 99%, which can achieve the efficient long-distance transmission of high-power laser. The overall structure of the device is compact, with high transmission efficiency, flexible and convenient adjustment, and the transmission distance is adjustable and controllable.

Description

Technical Field

[0001] The present invention relates to the technical field of laser transmission, and particularly to a high-power laser long-distance transmission device and a long-distance transmission method thereof. Background Art

[0002] With the development of laser technology, many laser application fields require laser beams to be transmitted over long distances in air. Generally, the transmission distance of laser beams in air is required to be dozens of meters to several kilometers, and the laser beams are required to maintain a specific shape and size within a certain transmission distance. During the transmission process of a large laser system, the laser beam passes through numerous optical elements and optical element clamping devices. Under the irradiation of high-power lasers, the optical elements absorb laser energy to generate thermal stress and thermal distortion. Coupled with environmental vibration, air disturbance, turbulence, and thermal blooming, these factors seriously affect the transmission characteristics of the laser beam, causing the laser beam to drift and expand.

[0003] Due to the obvious danger during high-power laser experiments and the high requirements for the test site, high-power laser transmission experimental research is often carried out indoors for simulation. However, due to the limitations of the test site, to achieve the transmission of high-power lasers over several hundred meters, and to measure and analyze the beam output at different transmission distances to obtain its transmission characteristic parameters, therefore, the design of a laser long-distance transmission method and a transmission light guiding device, and the use of this device to study the long-distance transmission characteristics of lasers have certain practical significance.

[0004] There are many methods for the long-distance transmission of laser power. Using mirrors to reflect the beam for multiple reflections [Gu Jianhui et al., High-power laser long-distance transmission and light guiding, Journal of Huazhong University of Science and Technology, 1995, Vol. 23, No. 3], but the transmission distance is only 51 meters, and the site utilization rate is relatively low; some scholars have simulated the long-distance transmission of lasers by self-building a transmission device composed of two cavity mirrors [Optical path for detecting thermal deformation of optical thin film elements, Invention Patent No.: 1565660, Authorization No.: ZL 201210466875.1], and the spot morphology at different transmission distances can be observed, but the transmission distance is still limited, and it does not have the function of beam output, and can only be visually observed, and the transmission characteristic parameter data of the beam cannot be obtained.

[0005] Currently, the existing laser long-distance transmission methods and light guiding devices still have a series of problems such as single transmission method and function, limited transmission distance, low test site utilization rate, and low flexibility. Summary of the Invention

[0006] The object of the present invention is to provide a high-power laser long-distance transmission device in view of the technical defects of limited transmission distance and low test site utilization rate in the prior art.

[0007] Another object of the present invention is to provide a long-distance transmission method for the above-mentioned high-power laser long-distance transmission device.

[0008] The technical solution adopted to achieve the object of the present invention is as follows:

[0009] A high-power laser long-distance transmission device includes a round-trip transmission mirror group composed of an even number of mirror pairs arranged in correspondence with each other, and each mirror is arranged on a base through a two-dimensionally adjustable mirror clamping device;

[0010] The mirror clamping device includes a fixed bracket and a mirror clamping assembly for clamping the mirror;

[0011] The mirror clamping assembly includes a mirror placement frame for placing the mirror and a positioning assembly for positioning the mirror on the mirror placement frame;

[0012] The mirror placement frame is adjustably fixed to the fixed bracket through a two-dimensionally adjustable assembly;

[0013] The two-dimensionally adjustable assembly includes an upper adjustment knob assembly, a lower adjustment knob assembly, and a universal bearing assembly. One corner of the bottom of the mirror placement frame is rotatably connected to the lower part of the fixed bracket through the universal bearing assembly, and one corner of the top of the mirror placement frame is rotatably connected to the upper part of the fixed bracket through the upper adjustment knob assembly. The upper adjustment knob assembly is located directly above the universal bearing assembly to adjust the pitch angle of the mirror placement frame;

[0014] The other corner of the bottom of the mirror placement frame is rotatably connected to the lower part of the fixed bracket through the lower adjustment knob assembly. The lower adjustment knob assembly and the universal bearing assembly are at the same horizontal height to adjust the horizontal rotation angle of the mirror placement frame.

[0015] In the above technical solution, the mirror is coated with a high-power dielectric film with a reflectivity greater than 99%.

[0016] In the above technical solution, the fixed bracket includes a U-shaped base and an L-shaped fixing plate integrated into one structure. The upper adjustment knob assembly is installed on the top of the L-shaped fixing plate, the universal bearing assembly is installed at the bending angle position of the L-shaped fixing plate, and the lower adjustment knob assembly is installed at one end of the bottom of the L-shaped fixing plate far from the universal bearing assembly.

[0017] In the above technical solution, two long strip-shaped fixing holes are provided on the horizontal plate of the U-shaped base.

[0018] In the above technical solution, the mirror placement frame includes a bottom support for receiving the bottom surface of the mirror, a back plate for receiving the rear side surface of the mirror, and a top plate.

[0019] In the above technical solution, the positioning assembly includes a lateral limiting member and a longitudinal limiting member;

[0020] The lateral limiting member is a pressing piece installed in front of the top plate;

[0021] The longitudinal limiting member includes a lens clamping strip for pressing the endoscope, a guide pin for installing the lens clamping strip below the top plate, and a locking knob threadedly connected to the top plate. When the locking knob rotates downward in a spiral manner, it applies a downward pressure to the lens clamping strip to press the endoscope tightly.

[0022] In the above technical solution, the upper adjusting screw knob assembly includes a first threaded sleeve embedded in the L-shaped fixing plate, a first screw threadedly engaged with the first threaded sleeve, a first knob fixed to the tail end of the first screw, and a first V-shaped top block embedded in the back plate. The tip of the first screw is hemispherical, and the hemispherical tip is located in the V-shaped groove of the first V-shaped top block;

[0023] The lower adjusting screw knob assembly includes a second threaded sleeve embedded in the L-shaped fixing plate, a second screw threadedly engaged with the second threaded sleeve, a second knob fixed to the tail end of the second screw, and a second V-shaped top block embedded in the back plate. The tip of the second screw is hemispherical, and the hemispherical tip is located in the V-shaped groove of the second V-shaped top block;

[0024] The L-shaped fixing plate and the back plate are connected by a movable connecting member.

[0025] In the above technical solution, the first threaded sleeve and the second threaded sleeve are made of phosphor bronze;

[0026] The first screw and the second screw are made of nickel-containing alloy steel;

[0027] The first V-shaped top block and the second V-shaped top block are made of SKD11 superhard steel.

[0028] In the above technical solution, the universal bearing assembly includes an intermediate connecting shaft, a universal bearing, and a bearing seat for installing the universal bearing. The bearing seat is fixed on the L-shaped fixing plate. The universal bearing is located in the through hole of the L-shaped fixing plate. One end of the intermediate connecting shaft is fixedly connected to the back plate, and the other end is fixed to the universal bearing by a bolt. There is a gap between the side wall of the intermediate connecting shaft and the inner wall of the through hole to enable it to rotate within a certain angle.

[0029] In the above technical solution, at the corresponding positions of the back plate and the L-shaped fixing plate, there are formed spot positioning holes that provide a reference basis for adjusting the spot position during the laser transmission process.

[0030] In the above technical solution, two adjacent endoscope clamping devices are respectively fixed on one of the bases through the fixing holes.

[0031] On the other hand, a long-distance transmission method of a high-power laser long-distance transmission device

[0032] The high-power laser long-distance transmission device includes a round-trip transmission endoscope group composed of an even number of endoscopes arranged in pairs. Each endoscope is arranged on a base through an endoscope clamping device to adjust the left-right angle and pitch angle of the endoscope;

[0033] Step 1: After being reflected by the guiding endoscope CM, the high-power laser beam passes through the pore under the endoscope clamping device corresponding to the end endoscope CMn in the endoscope group and irradiates the first endoscope CM1 at a small elevation angle, forming a first light spot on the first endoscope CM1;

[0034] Step 2: Adjust the left-right angle and pitch angle of each endoscope in the round-trip transmission endoscope group in sequence, so that the high-power laser beam is transmitted from the first endoscope CM1 to the penultimate endoscope CMn-1 in sequence, and a first light spot is formed on each endoscope, completing the transmission of the first half of the optical path;

[0035] Step 3: Adjust the left-right angle and pitch angle of the penultimate endoscope CMn-1, so that the high-power laser beam is transmitted from the penultimate endoscope CMn-1 to the end endoscope in a light path slightly higher than the first half of the optical path in sequence, forming a second light spot on the third endoscope CMn-1 to the first endoscope CM1, and forming a first light spot on the end endoscope CMn, completing the transmission of the first light path after the first half;

[0036] Step 4: Adjust the left-right angle and pitch angle of the end endoscope CMn, so that the high-power laser beam irradiates the first endoscope CM1 at a small elevation angle, forming a third light spot on the first endoscope CM1; according to the methods of Step 2 and Step 3, a second light spot is formed on the end endoscope CMn, completing the transmission of the second light path;

[0037] Step 5: According to the methods of Step 2 and Step 3, until m complete light spots are formed on the end endoscope CMn, that is, m light paths are completed, and the total transmission distance is L = (2n - 2) * l * m = 14l * 4.

[0038] In the above technical solution, in Step 1, the elevation angle at which the high-power laser beam irradiates the first endoscope CM1 is 0.3° - 1.0°.

[0039] In the above technical solution, the first light spot on each endoscope is located at the center of the endoscope, and the distance from the lower edge of the endoscope is 1.5 - 2.5 mm, preferably 2 mm.

[0040] In the above technical solution, the second light spot on each endoscope is located directly above the first light spot, and the distance between the tangent line of the lower edge of the second light spot and the tangent line of the upper edge of the first light spot is 2-4 mm, preferably 3 mm.

[0041] On the other hand of the present invention, the application of the above long-distance transmission method in the high-power laser long-distance transmission experiment.

[0042] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0043] 1. The high-power laser long-distance transmission device provided by the present invention includes a reciprocating transmission endoscope group composed of an even number of endoscopes arranged in pairs, and each endoscope is arranged on a base through a two-dimensionally adjustable endoscope clamping device. By adjusting the angle of the endoscope clamping device, the reciprocating transmission of high-power laser in the reciprocating transmission endoscope group is realized. Among them, the endoscope is coated with a high-power dielectric film, and the reflectivity is greater than 99%, which can realize the efficient long-distance transmission of high-power laser. The overall structure of the device is compact, the transmission efficiency is high, the adjustment is flexible and convenient, and the transmission distance is adjustable and controllable.

[0044] 2. The long-distance transmission method of the high-power laser long-distance transmission device provided by the present invention can maximize the transmission distance in a small experimental site by adjusting the number of endoscopes, the interval between two endoscopes, and the number of reciprocations, reducing the requirements for the experimental site and improving the utilization rate of the experimental site at the same time. Brief Description of the Drawings

[0045] Figure 1 The axonometric view of the two-dimensionally adjustable endoscope clamping device is shown;

[0046] Figure 2 The side view of the two-dimensionally adjustable endoscope clamping device is shown;

[0047] Figure 3 The front view of the two-dimensionally adjustable endoscope clamping device is shown;

[0048] Figure 4 The cross-sectional structure schematic diagram of the lower adjustment knob assembly is shown;

[0049] Figure 5 The structure schematic diagram of the high-power laser long-distance transmission device is shown;

[0050] Among them, A - endoscope, B - endoscope clamping device, C - base, D - light guiding device, E - CCD camera.

[0051] Figure 6 The schematic diagram of the principle of the long-distance transmission method is shown.

[0052] In the figure: 1 - Fixed bracket, 1-1 - U-shaped base, 1-2 - L-shaped fixing plate, 2-1 - Bottom support, 2-2 - Back plate, 2-3 - Top plate, 3 - Locking knob, 4 - Pressing piece, 5 - Fixing hole, 6 - Lens clamping strip, 7 - Guide pin, 8 - First threaded sleeve, 9 - First screw rod, 10 - First knob, 11 - First V-shaped top block, 12 - Intermediate coupling shaft, 13 - Universal bearing, 14 - Bearing seat, 15 - Second threaded sleeve, 16 - Second screw rod, 17 - Second V-shaped top block, 18 - Second knob, 19 - Light spot positioning hole. Detailed implementation mode

[0053] The present invention will be further described in detail below in conjunction with specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0054] Embodiment 1

[0055] A laparoscope clamping device capable of two-dimensional adjustment, as Figure 1-3 shown, includes a fixed bracket 1 and a laparoscope clamping assembly for clamping a laparoscope;

[0056] The laparoscope clamping assembly includes a laparoscope placement frame and a positioning assembly for positioning the laparoscope on the laparoscope placement frame, and the laparoscope is placed in the laparoscope placement frame;

[0057] The positioning assembly includes a lateral limiting member and a longitudinal limiting member;

[0058] The lateral limiting member is a pressing piece 4, and the pressing piece 4 is detachably installed in front of the top end of the laparoscope placement frame through 4 bolts to limit the laparoscope and prevent the laparoscope from sliding forward;

[0059] The longitudinal limiting member includes a lens clamping strip 6, a guide pin 7 and a locking knob 3. The lens clamping strip 6 is used to press the laparoscope. The bottom of the guide pin 7 is fixed on the lens clamping strip 6, the pin body passes through the hole formed in the top plate 2-3, and the top cap at the top is located above the top plate 2-3 and cannot pass through the hole. It is installed on the top plate 2-3 through the guide pin 7. The locking knob 3 is threadedly connected to the top plate 2-3. When the bottom end of the locking knob 3 moves downwards, a downward pressure is applied to the lens clamping strip 6 to press the laparoscope. In actual application, the number of the locking knobs 3 is 3, the number of the guide pins 7 is 2, and one guide pin 7 is arranged between two adjacent locking knobs 3.

[0060] The laparoscope placement frame is adjustable and fixed on the fixed bracket 1 through a two-dimensional adjustment assembly;

[0061] The two-dimensional adjustment assembly includes an upper adjustment knob assembly, a lower adjustment knob assembly, and a universal bearing assembly. One corner of the bottom of the endoscope placement frame is rotatably connected to the lower part of the fixed bracket 1 through the universal bearing assembly, and one corner of the top of the endoscope placement frame is rotatably connected to the upper part of the fixed bracket 1 through the upper adjustment knob assembly to adjust the pitching angle of the endoscope placement frame. The upper adjustment knob assembly is directly above the universal bearing assembly, and the lower adjustment knob assembly and the universal bearing assembly are at the same horizontal height to adjust the horizontal rotation angle of the endoscope placement frame.

[0062] When adjusting the pitching angle, after adjusting the lower adjustment knob assembly, by rotating the upper adjustment knob assembly, the upper end of the endoscope placement frame is pushed to move back and forth. The bearing structure in the universal bearing assembly rotates relatively, and the rotating contact point in the lower adjustment knob assembly rotates relatively, so as to realize the pitching adjustment of the endoscope placement frame;

[0063] When adjusting the horizontal rotation angle, after adjusting the upper adjustment knob assembly, by rotating the lower adjustment knob assembly, the side of the endoscope placement frame is pushed to move back and forth. The bearing structure in the universal bearing assembly rotates relatively, and the rotating contact point in the upper adjustment knob assembly rotates relatively to adjust the horizontal rotation angle of the endoscope placement frame.

[0064] Specifically, the fixed bracket 1 includes a U-shaped base 1-1 and an L-shaped fixing plate 1-2 that are integrally structured (formed in one piece). The upper adjustment knob assembly is installed at the top of the L-shaped fixing plate 1-2, the universal bearing assembly is installed at the bending angle position of the L-shaped fixing plate 1-2, and the lower adjustment knob assembly is installed at one end of the bottom of the L-shaped fixing plate 1-2 away from the universal bearing assembly.

[0065] Specifically, the endoscope placement frame includes a bottom tray 2-1, a back plate 2-2, and a top plate 2-3 that are integrally connected; the bottom tray 2-1 is used to support the bottom surface of the endoscope, and the back plate 2-2 is used to support the rear side of the endoscope; the locking knob 3 is arranged on the top plate 2-3. The endoscope placement frame can clamp an endoscope with dimensions of 200*100*30mm, and the clamping space is relatively large.

[0066] As Figure 4 shown, the lower adjustment knob assembly includes a second threaded sleeve 15 embedded in the L-shaped fixing plate 1-2, a second screw rod 16 threadedly engaged with the second threaded sleeve 15, a second knob 18 fixed at the end of the second screw rod 16, and a second V-shaped top block 17 embedded in the back plate 2-2. The tip of the second screw rod 16 is hemispherical, and the hemispherical tip is located in the V-shaped groove of the second V-shaped top block 17;

[0067] The structure of the upper adjustment knob assembly is the same as that of the lower adjustment knob assembly, including a first threaded sleeve 8 embedded in the L-shaped fixing plate 1-2, a first screw rod 9 threadedly engaged with the first threaded sleeve 8, a first knob 10 fixed to the tail end of the first screw rod 9, and a first V-shaped top block 11 embedded in the back plate 2-2. The tip of the first screw rod 9 is hemispherical, and the hemispherical tip is located in the V-shaped groove of the first V-shaped top block 11;

[0068] The L-shaped fixing plate 1-2 and the back plate 2-2 are connected by a movable connecting member, which reserves an adjustment space for the upper adjustment knob assembly and the lower adjustment knob assembly on the premise of ensuring that the two do not separate. The movable connecting member can be a rivet or an elastic member.

[0069] The universal bearing assembly includes an intermediate connecting shaft 12, a universal bearing 13, and a bearing seat 14 for installing the universal bearing 13. The bearing seat 14 is fixed on the L-shaped fixing plate 1-2. The universal bearing 13 is located in the through hole of the L-shaped fixing plate 1-2. One end of the intermediate connecting shaft 12 is fixedly connected to the back plate 2-2, and the other end is fixed to the universal bearing 13 by bolts. There is a gap between the side wall of the intermediate connecting shaft 12 and the inner wall of the through hole to enable it to rotate within a certain angle. The universal bearing 13 adopts a SKF GE15C type universal bearing, which has a small gap and a large rigidity, can provide a 15° all-round movement margin, and at the same time has a large rigidity, which guarantees the load bearing of the endoscope placement frame.

[0070] Preferably, the first threaded sleeve 8 and the second threaded sleeve 15 are made of phosphor bronze, the first screw rod 9 and the second screw rod 16 are made of nickel-containing alloy steel, and the pitch is M10X0.25 ultra-precision pitch, thus ensuring high resolution and high amplification torque during the adjustment process, and having obvious advantages in terms of adjustment accuracy and adjustment difficulty.

[0071] Preferably, the first V-shaped top block 11 and the second V-shaped top block 17 are made of SKD11 super-hard steel with a roughness of 0.8mm, ensuring smooth movement, high reliability and high stability.

[0072] Preferably, two long strip-shaped fixing holes 5 are provided on the horizontal plate of the U-shaped base 1-1, which can be adjustably fixed on the base or other specific positions.

[0073] Preferably, light spot positioning holes 19 are formed at corresponding positions of the back plate 2-2 and the L-shaped fixing plate 1-2, which can provide a reference basis for adjusting the light spot position during the laser transmission process.

[0074] Embodiment 2

[0075] A high-power laser long-distance transmission device, such asFigure 5 As shown, it includes a reciprocating transmission mirror group composed of an even number of pairwise corresponding mirrors, and each mirror A is arranged on the base C through the two-dimensionally adjustable mirror clamping device B described in Embodiment 1.

[0076] The mirror is coated with a high-power dielectric film with a reflectivity greater than 99%.

[0077] A high-power laser long-distance transmission experimental system, as Figure 5 shown, includes the above-mentioned high-power laser long-distance transmission device, a light guiding device for guiding out the high-power laser, and a CCD camera E for receiving the high-power laser guided out by the light guiding device D and analyzing it.

[0078] The high-power laser is irradiated into the high-power laser long-distance transmission device at a small elevation angle after passing through the input mirror, and after reciprocating long-distance transmission through the high-power laser long-distance transmission device, it is guided out by the light guiding device D to the CCD camera E to measure various parameters of the high-power laser after long-distance transmission.

[0079] According to the transmission distance calculation formula L = (2n - 2)*l*m in Embodiment 2, calculate the position where the high-power laser needs to be guided out, and then insert the light guiding device into this position for guiding out.

[0080] Embodiment 3

[0081] The long-distance transmission method of the high-power laser long-distance transmission device described in Embodiment 2 includes the following steps:

[0082] Step 1: After the high-power laser beam is reflected by the input mirror CM, it passes through the pore under the mirror clamping device corresponding to the last mirror CMn in the mirror group and is irradiated onto the first mirror CM1 at a small elevation angle, forming the first light spot on the first mirror CM1.

[0083] Step 2: Adjust the left-right and pitch angles of each mirror in the reciprocating transmission mirror group in turn, so that the high-power laser beam is transmitted from the first mirror (CM1) to the penultimate mirror CMn - 1 in turn, and the first light spot is formed on each mirror, completing the transmission of the first half of the optical path.

[0084] Step 3: Adjust the left-right and pitch angles of the penultimate mirror CMn - 1, so that the high-power laser beam is transmitted from the penultimate mirror CMn - 1 to the last mirror in turn along an optical path slightly higher than the first half of the optical path, forming the second light spot on the third-to-last mirror CMn - 1 to the first mirror CM1, and forming the first light spot on the last mirror CMn, completing the transmission of the first light path in the second half.

[0085] Step 4: Adjust the left - right and pitch angles of the end - stage endoscope (CMn) so that the high - power laser beam irradiates the first - stage endoscope CM1 at a small elevation angle, forming a third light spot on the first - stage endoscope CM1; according to the methods of Step 2 and Step 3, form a second light spot on the end - stage endoscope CMn to complete the transmission of the second optical path.

[0086] Step 5: According to the methods of Step 2 and Step 3, until m complete light spots are formed on the end - stage endoscope CMn, that is, m optical paths are completed. The total transmission distance is L=(2n - 2)*l*m = 14l*4.

[0087] For the above high - power laser long - distance transmission device, the number of endoscopes can be reasonably adjusted according to the site size or transmission - distance requirements. Taking 8 endoscopes as an example, the long - distance transmission method of the high - power laser long - distance transmission device is as Figure 6 shown

[0088] First, define that the first - stage endoscope CM1 and the end - stage endoscope CM8 are arranged opposite to each other, and the second endoscope CM2 to the seventh endoscope CM7 are arranged alternately in sequence.

[0089] After the high - power laser beam is reflected by the guiding endoscope M1, it irradiates the first - stage endoscope CM1, forming a first light spot on the mirror surface of the first - stage endoscope CM1.

[0090] Adjust the two - dimensional angle of the endoscope clamping device corresponding to the endoscope CM1 so that the high - power laser beam is reflected by the first - stage endoscope CM1 to the second endoscope CM2, forming a first light spot on the mirror surface of the endoscope CM2.

[0091] Adjust the two - dimensional angle of the endoscope clamping device corresponding to the second endoscope CM2 so that the high - power laser beam is reflected by the second endoscope CM2 to the third endoscope CM3, forming a first light spot on the mirror surface of the third endoscope CM3.

[0092] And so on. When adjusting the two - dimensional angle of the endoscope clamping device corresponding to the sixth endoscope CM6, a first light spot is formed on the mirror surface of the seventh endoscope CM7. At this time, the first half of the optical path is completed; then the high - power laser beam is reflected back to the sixth endoscope CM6 by the seventh endoscope CM7, forming a second light spot on the mirror surface of the sixth endoscope CM6. Adjust the two - dimensional angle of the endoscope clamping device corresponding to the seventh endoscope CM7 so that the second light spot on the sixth endoscope CM6 is directly above the first light spot.

[0093] At this time, the returned high - power laser returns to the endoscope CM1 along an optical path slightly higher than the first half of the optical path, and then is reflected to the end - stage endoscope CM8, forming a first light spot at the exact center position below the mirror surface of the end - stage endoscope CM8, completing the second half of the optical path, that is, completing the first optical path. The one - way transmission distance L 单=(2n - 2)*l = 14l, where l is the distance between two oppositely arranged endoscopes;

[0094] Then adjust the two - dimensional angle of the endoscope clamping device corresponding to endoscope CM8, and form the second light spot on endoscope CM8 according to the above process, and complete the second optical path;

[0095] And so on, until 4 light spots are formed on endoscope CM8, that is, 4 optical paths are completed, and the total transmission distance is L=(2n - 2)*l*m = 64l.

[0096] The above high - power laser long - distance transmission method adopts a reciprocating transmission method combined with multiple endoscopes. By changing the number of endoscopes n, the distance l between two oppositely arranged endoscopes, and the number of light spots m on the endoscope at the end of a single - pass transmission, the maximum transmission distance can be achieved within a limited test site.

[0097] After being reflected by the guiding endoscope M1, the high - power laser beam passes through the gap in the middle of the U - shaped base (1 - 1) of the two - dimensionally adjustable endoscope clamping device corresponding to the endoscope CM8, and irradiates the first endoscope CM1 at an elevation angle of 0.5°.

[0098] Preferably, the first light spot on each endoscope is located at the center of the endoscope, and the distance from the lower edge of the endoscope is 1.5 - 2.5 mm, preferably 2 mm, and the position of the light - spot positioning hole provided on the back plate in the endoscope placement frame can be referred to.

[0099] Preferably, the second light spot on each endoscope is located directly above the first light spot, and the distance between the tangent line of the lower edge of the second light spot and the tangent line of the upper edge of the first light spot is 2 - 4 mm, preferably 3 mm, and the position of the light - spot positioning hole provided on the back plate in the endoscope placement frame can be referred to.

[0100] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A high-power laser long-distance transmission device, characterized in that It includes a round-trip transmission endoscope group composed of an even number of pairwise corresponding endoscopes, and each endoscope is arranged on a base through a two-dimensionally adjustable endoscope clamping device; The endoscope clamping device includes a fixed bracket (1) and an endoscope clamping assembly for clamping the endoscope; The endoscope clamping assembly includes an endoscope placement frame for placing the endoscope and a positioning assembly for positioning the endoscope on the endoscope placement frame; The endoscope placement frame is adjustably fixed on the fixed bracket (1) through a two-dimension adjustment assembly; The two-dimension adjustment assembly includes an upper adjustment knob assembly, a lower adjustment knob assembly and a universal bearing assembly. One corner of the bottom of the endoscope placement frame is rotatably connected to the lower part of the fixed bracket (1) through the universal bearing assembly, and one corner of the top of the endoscope placement frame is rotatably connected to the upper part of the fixed bracket (1) through the upper adjustment knob assembly. The upper adjustment knob assembly is directly above the universal bearing assembly to adjust the pitch angle of the endoscope placement frame; The other corner of the bottom of the endoscope placement frame is rotatably connected to the lower part of the fixed bracket (1) through the lower adjustment knob assembly. The lower adjustment knob assembly and the universal bearing assembly are at the same horizontal height to adjust the horizontal rotation angle of the endoscope placement frame; During the long-distance transmission of high-power laser, by adjusting the angle of the endoscope clamping device, the round-trip transmission of high-power laser in the round-trip transmission endoscope group is realized; The endoscope is coated with a high-power dielectric film with a reflectivity greater than 99%; The fixed bracket (1) includes a U-shaped base (1-1) and an L-shaped fixing plate (1-2) that are integrally structured. The upper adjustment knob assembly is installed on the top of the L-shaped fixing plate (1-2), the universal bearing assembly is installed at the bending angle position of the L-shaped fixing plate (1-2), and the lower adjustment knob assembly is installed at one end of the bottom of the L-shaped fixing plate (1-2) far from the universal bearing assembly.

2. The high-power laser long-distance transmission device according to claim 1, characterized in that Two long strip-shaped fixing holes (5) are arranged on the horizontal plate of the U-shaped base (1-1).

3. The high-power laser long-distance transmission device according to claim 1, characterized in that, The endoscope placement frame includes a bottom support (2-1) for receiving the bottom surface of the endoscope, a back plate (2-2) for receiving the rear side of the endoscope, and a top plate (2-3).

4. The high-power laser long-distance transmission device according to claim 3, wherein The positioning assembly includes a lateral limiting member and a longitudinal limiting member; The lateral limiting member is a pressing piece (4) installed in front of the top plate (2-3); The longitudinal limiting member includes a lens clamping strip (6) for pressing the endoscope, a guide pin (7) for installing the lens clamping strip (6) under the top plate (2-3), and a locking knob (3) threadedly connected to the top plate (2-3). When the locking knob (3) rotates downward, it applies a downward pressure to the lens clamping strip (6) to press the endoscope tightly.

5. The high-power laser long-distance transmission device according to claim 3, characterized in that The upper adjusting knob assembly includes a first threaded sleeve (8) embedded in the L-shaped fixing plate (1-2), a first screw rod (9) threadedly engaged with the first threaded sleeve (8), a first knob (10) fixed to the tail end of the first screw rod (9), and a first V-shaped top block (11) embedded in the back plate (2-2). The tip of the first screw rod (9) is hemispherical, and the hemispherical tip is located in the V-shaped groove of the first V-shaped top block (11). The lower adjusting knob assembly includes a second threaded sleeve (15) embedded in the L-shaped fixing plate (1-2), a second screw rod (16) threadedly engaged with the second threaded sleeve (15), a second knob (18) fixed to the tail end of the second screw rod (16), and a second V-shaped top block (17) embedded in the back plate (2-2). The tip of the second screw rod (16) is hemispherical, and the hemispherical tip is located in the V-shaped groove of the second V-shaped top block (17). The L-shaped fixing plate (1-2) and the back plate (2-2) are connected by a movable connecting member.

6. The high-power laser long-distance transmission device according to claim 5, wherein The first threaded sleeve (8) and the second threaded sleeve (15) are made of phosphor bronze. The first screw rod (9) and the second screw rod (16) are made of nickel-containing alloy steel. The first V-shaped top block (11) and the second V-shaped top block (17) are made of SKD11 super-hard steel.

7. The high-power laser long-distance transmission device according to claim 3, characterized in that, The universal bearing assembly includes an intermediate connecting shaft (12), a universal bearing (13), and a bearing seat (14) for mounting the universal bearing (13). The bearing seat (14) is fixed on the L-shaped fixing plate (1-2). The universal bearing (13) is located in the through hole of the L-shaped fixing plate (1-2). One end of the intermediate connecting shaft (12) is fixedly connected to the back plate (2-2), and the other end is fixed to the universal bearing (13) by a bolt. There is a gap between the side wall of the intermediate connecting shaft (12) and the inner wall of the through hole to enable it to rotate within a certain angle.

8. The high-power laser long-distance transmission device according to claim 3, wherein, At corresponding positions of the back plate (2-2) and the L-shaped fixing plate (1-2), there are formed spot positioning holes (19) that provide a reference basis for adjusting the spot position during the laser transmission process.

9. The high-power laser long-distance transmission device according to claim 2, characterized in that, Adjacent two endoscopic holding devices are respectively fixed on one of the bases through the fixing holes (5).

10. A long-distance transmission method of a high-power laser long-distance transmission device, characterized in that The high-power laser long-distance transmission device includes a round-trip transmission endoscopic group composed of an even number of endoscopes arranged in pairs. Each endoscope is arranged on a base through an endoscopic holding device to adjust the left-right angle and pitch angle of the endoscope. Step 1: After being reflected by the input endoscope CM, the high-power laser beam passes through the pore below the endoscopic holding device corresponding to the endoscope CMn at the end of the endoscopic group, and irradiates the first endoscope CM1 at an elevation angle of 0.3° - 1°, forming a first spot on the first endoscope CM1. Step 2: Adjust the left-right angle and pitch angle of each endoscope in the reciprocating transmission endoscope group in sequence, so that the high-power laser beam is transmitted from the first endoscope CM1 to the penultimate endoscope CMn-1 in sequence, and a first light spot is formed on each endoscope, completing the transmission of the first half of the optical path; Step 3: Adjust the left-right angle and pitch angle of the penultimate endoscope CMn-1, so that the high-power laser beam is transmitted from the penultimate endoscope CMn-1 to the last endoscope in sequence along an optical path slightly higher than the first half of the optical path, forming a second light spot on the penultimate endoscope CMn-1 to the first endoscope CM1, and forming a first light spot on the last endoscope CMn, completing the transmission of the first optical path; Step 4: Adjust the left-right angle and pitch angle of the last endoscope CMn, so that the high-power laser beam irradiates the first endoscope CM1 at an elevation angle of 0.5°, forming a third light spot on the first endoscope CM1; according to the methods of Step 2 and Step 3, form a second light spot on the last endoscope CMn, completing the transmission of the second optical path; Step 5: According to the method of Step 4, until m complete light spots are formed on the last endoscope CMn, that is, m optical paths are completed, and the total transmission distance is L = (2n - 2) * l * m = 14l * 4; Wherein, the first endoscope CM1 and the last endoscope CMn are arranged oppositely, the first endoscope CM1, the third endoscope CM3 until the penultimate endoscope CMn-1 are arranged in a plane in sequence, and the last endoscope CMn, the second endoscope CM2 until the third-to-last endoscope CMn-2 are arranged in a plane in sequence.

11. The long-distance transmission method according to claim 10, characterized in that, The first light spot on each endoscope is located at the center of the endoscope, and the distance from the lower edge of the endoscope is 1.5 - 2.5 mm.

12. The long-distance transmission method according to claim 10, wherein The first light spot on each endoscope is located at the center of the endoscope, and the distance from the lower edge of the endoscope is 2 mm.

13. The long-distance transmission method according to claim 12, characterized in that, The second light spot on each endoscope is located directly above the first light spot, and the distance between the tangent line of the lower edge of the second light spot and the tangent line of the upper edge of the first light spot is 2 - 4 mm.

14. The long-distance transmission method according to claim 12, characterized in that, The second light spot on each endoscope is located directly above the first light spot, and the distance between the tangent line of the lower edge of the second light spot and the tangent line of the upper edge of the first light spot is 3 mm.

15. Application of the long-distance transmission method according to any one of claims 10 - 14 in the high-power laser long-distance transmission experiment.

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