A high-power laser long-distance transmission experimental system and experimental method

Abstract

The present invention discloses a high-power laser long-distance transmission experimental system, comprising a high-power laser long-distance transmission device and a light guide device for guiding the high-power laser from the high-power laser long-distance transmission device; the high-power laser long-distance transmission device comprises a round-trip transmission cavity mirror group composed of an even number of cavity mirrors arranged in pairs, each cavity mirror being arranged on a base through a cavity mirror clamping device that can be adjusted in two dimensions. The overall structure of the experimental system is compact, and by adjusting the number of cavity mirrors, the interval between the two cavity mirrors, and the number of round trips, the transmission distance can be maximized in a smaller experimental site, reducing the requirements for the experimental site and improving the utilization rate of the experimental site.

Description

Technical Field

[0001] The present invention relates to the field of laser transmission technology, and in particular to a high-power laser long-distance transmission experimental system and an experimental method thereof. Background Art

[0002] With the development of laser technology, many laser application fields require that laser beams can be transmitted over long distances in the air. Generally, the transmission distance of laser beams in the air is required to be tens of meters to thousands of meters, and it is required to maintain a specific shape and size within a certain transmission distance. During the transmission process of large laser systems, the light beam passes through numerous optical components and optical component clamping devices. Under high-power laser irradiation, optical components absorb laser energy to produce thermal stress and thermal distortion. In addition, environmental vibration, air disturbance, turbulence, thermal blooming and other factors seriously affect the transmission characteristics of the laser beam, causing the laser beam to drift and expand.

[0003] Due to the obvious dangers of high-power laser tests and the high requirements for test sites, high-power laser transmission test research is often simulated indoors. However, due to the limitations of the test site, it is necessary to achieve the transmission of high-power lasers for hundreds of meters, measure and analyze the light beams at different transmission distances, and obtain their transmission characteristic parameters. Therefore, it is of practical significance to design a laser long-distance transmission method and a transmission light guide device, and use this device to study the long-distance transmission characteristics of lasers.

[0004] There are many methods and devices for long-distance transmission of laser power. Reflectors are used to transmit the light beam multiple times [Gu Jianhui et al., Long-distance transmission and light guidance of high-power lasers, 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 low; some scholars have built a transmission device consisting of two cavity mirrors to simulate long-distance laser transmission [Optical path for detection of thermal deformation of optical thin film components, invention patent number: 1565660, authorization number: ZL 201210466875.1], which can observe the spot morphology of different transmission distances, but the transmission distance is still limited, and the function of beam export is not available. It can only be observed visually, and the transmission characteristic parameter data of the beam cannot be obtained.

[0005] At present, 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 utilization rate of test sites, low flexibility, etc. Summary of the invention

[0006] The purpose of the present invention is to provide a high-power laser long-distance transmission experimental system to address the technical defects of the high-power laser long-distance transmission experimental system in the prior art, such as single transmission mode and function, limited transmission distance, low test site utilization and low flexibility.

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

[0008] The technical solution adopted to achieve the purpose of the present invention is:

[0009] A high-power laser long-distance transmission experimental system, comprising a high-power laser long-distance transmission device and a light guide device for guiding the high-power laser from the high-power laser long-distance transmission device;

[0010] The high-power laser long-distance transmission device comprises a round-trip transmission cavity mirror group consisting of an even number of cavity mirrors arranged in pairs, each cavity mirror being arranged on a base through a cavity mirror clamping device that can be adjusted in two dimensions to adjust the pitch angle and left-right angle of the cavity mirror;

[0011] The light guiding device comprises a first light guiding side and a second light guiding side which are arranged opposite to each other;

[0012] The first light guide side comprises a first column, a cantilever arm assembled on the first column through a first longitudinal sliding positioning mechanism, and a first light guide mirror installed below the cantilever arm;

[0013] The second light guide side includes a second column and a second light guide mirror and a third light guide mirror assembled on the second column through a second longitudinal sliding positioning mechanism;

[0014] The first light guide mirror and the second light guide mirror are arranged opposite to each other, and the second light guide mirror is located directly above the third light guide mirror.

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

[0016] In the above technical solution, the laparoscope clamping device includes a fixed bracket and a laparoscope clamping assembly for clamping the laparoscope;

[0017] The laparoscope clamping assembly comprises a laparoscope placement frame for placing the laparoscope and a positioning assembly for positioning the laparoscope on the laparoscope placement frame;

[0018] The laparoscope placement frame is adjustably fixed on the fixing bracket via a two-dimensional adjustment component;

[0019] The two-dimensional adjustment assembly includes an upper adjustment screw assembly, a lower adjustment screw assembly and a universal bearing assembly. The bottom corner of the laparoscope placement frame is rotatably connected to the lower part of the fixed bracket through the universal bearing assembly, and the top corner of the laparoscope placement frame is rotatably connected to the upper part of the fixed bracket through the upper adjustment screw assembly. The upper adjustment screw assembly is located directly above the universal bearing assembly to adjust the pitch angle of the laparoscope placement frame.

[0020] The other bottom corner of the laparoscope placement frame is rotatably connected to the lower part of the fixed bracket through the lower adjustment screw assembly, and the lower adjustment screw assembly and the universal bearing assembly are located at the same horizontal height to adjust the horizontal rotation angle of the laparoscope placement frame.

[0021] In the above technical solution, the fixed bracket includes a U-shaped base and an L-shaped fixing plate in an integrated structure, the upper adjusting screw button 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 adjusting screw button assembly is installed at the bottom of the L-shaped fixing plate away from one end of the universal bearing assembly.

[0022] In the above technical solution, two long strip fixing holes are arranged on the horizontal plate of the U-shaped base.

[0023] In the above technical solution, the laparoscope placement frame includes a bottom support for receiving the bottom surface of the laparoscope, a back plate and a top plate for receiving the rear side surface of the laparoscope.

[0024] In the above technical solution, the positioning assembly includes a transverse limiting member and a longitudinal limiting member;

[0025] The transverse limiter is a pressing sheet installed in front of the top plate;

[0026] The longitudinal limiter includes a lens clamp for pressing the laparoscope, a guide pin for installing the lens clamp under the top plate, and a locking button threadedly connected to the top plate. When the locking button is screwed downward, downward pressure is applied to the lens clamp to press the laparoscope.

[0027] 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 matched with the first threaded sleeve, a first knob fixed at 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;

[0028] The lower adjusting screw knob assembly comprises a second threaded sleeve embedded in the L-shaped fixing plate, a second screw rod threadably matched with the second threaded sleeve, a second knob fixed at the tail end of the second screw rod, and a second V-shaped top block embedded in the back plate, wherein the tip of the second screw rod is hemispherical and the hemispherical tip is located in the V-shaped groove of the second V-shaped top block;

[0029] The L-shaped fixing plate is connected to the back plate via a movable connecting piece.

[0030] In the above technical solution, the first threaded sleeve and the second threaded sleeve are made of phosphor bronze;

[0031] The first screw and the second screw are made of nickel-containing alloy steel;

[0032] The first V-top block and the second V-top block are made of SKD11 super-hard steel.

[0033] In the above technical solution, the universal bearing assembly includes an intermediate coupling shaft, a universal bearing and a bearing seat for mounting 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 coupling shaft is fixedly connected to the back plate, and the other end is fixed to the universal bearing by bolts, and there is a gap between the side wall of the intermediate coupling shaft and the inner wall of the through hole to enable it to rotate within a certain angle.

[0034] In the above technical solution, light spot positioning holes are formed at corresponding positions of the back plate and the L-shaped fixing plate to provide a reference basis for adjusting the light spot position during laser transmission.

[0035] In the above technical solution, two adjacent laparoscope clamping devices are respectively fixed on one of the bases through the fixing holes.

[0036] In the above technical solution, the first longitudinal sliding positioning mechanism includes a first precision guide rail vertically installed on the first column and a first precision guide rail slider and a first locking button fixedly installed on the end of the cantilever arm. The first precision guide rail slider slides along the first precision guide rail, and the first locking button locks the cantilever arm on the first column.

[0037] In the above technical solution, the cantilever arm includes a horizontal cantilever part and a vertical connecting part, the first light guide is fixed below the end of the horizontal cantilever part, and the first precision guide rail slider is fixed on the side of the vertical connecting part.

[0038] In the above technical solution, locking arms are respectively installed on the front and rear sides of the vertical connection part, and the first locking button is two locking bolts, each of which passes through one of the locking arms and is locked on the first column.

[0039] In the above technical solution, the horizontal suspension beam part is wedge-shaped, and the end away from the vertical connection part is smaller;

[0040] The end of the horizontal cantilever beam portion is provided with a 45° positioning edge. When the frame of the first light guide mirror is aligned with the 45° positioning edge, the first light guide mirror is inclined at 45°.

[0041] In the above technical solution, the second longitudinal sliding positioning mechanism includes a second precision guide rail installed on the side of the second column, an upper 45° attachment for fixing the second light guide mirror, a lower 45° attachment for fixing the third light guide mirror, and a second locking button and a third locking button for fixing the upper 45° attachment and the lower 45° attachment on the second column respectively;

[0042] The second precision guide rail slider in the upper 45° attachment and the third precision guide rail slider in the lower 45° attachment are respectively slidably connected to the second precision guide rail.

[0043] In the above technical solution, upper accessory locking arms are respectively installed on the front and rear sides of the upper 45° accessory, and the second locking button is two locking bolts, each of which passes through one of the upper accessory locking arms and is locked on the second column;

[0044] The front and rear sides of the lower 45° accessory are respectively installed with lower accessory locking arms, and the third locking button is two locking bolts, each of which passes through a lower accessory locking arm and is locked on the second column.

[0045] In the above technical solution, the bottom ends of the first column and the second column are fixed on the column base.

[0046] The above technical solution also includes a high-power laser transmitter and a laser detection device.

[0047] In another aspect of the present invention, the experimental method of the above-mentioned high-power laser long-distance transmission experimental system is as follows: the high-power laser emitted by the high-power laser transmitter is transmitted over a long distance through the high-power laser long-distance transmission device and the position where the high-power laser needs to be exported is calculated according to the long-distance transmission distance method, and then the light guiding device is inserted into the position for export, and the light guiding device exports the high-power laser to the laser detector for analysis.

[0048] In the above technical solution, the long-distance transmission method comprises the following steps:

[0049] Step 1: After being reflected by the introduction cavity mirror CM, the high-power laser beam passes through the aperture below the cavity mirror clamping device corresponding to the end cavity mirror CMn in the cavity mirror group, and irradiates the head cavity mirror CM1 at a small elevation angle, forming the first light spot on the head cavity mirror CM1;

[0050] Step 2: sequentially adjust the left and right and elevation angles of each cavity mirror in the round-trip transmission cavity mirror group, so that the high-power laser beam is sequentially transmitted from the first cavity mirror CM1 to the second-to-last cavity mirror CMn-1, and the first light spot is formed on each cavity mirror, completing the transmission of the first half of the optical path;

[0051] Step 3: Adjust the left and right and elevation angles of the second-to-last cavity mirror CMn-1, so that the high-power laser beam is transmitted from the second-to-last cavity mirror CMn-1 to the end cavity mirror in sequence along an optical path slightly higher than the first half of the optical path, forming a second light spot from the third-to-last cavity mirror CMn-1 to the head cavity mirror CM1, and forming the first light spot on the end cavity mirror CMn, completing the transmission of the first optical path;

[0052] Step 4: Adjust the left and right and elevation angles of the end cavity mirror CMn so that the high-power laser beam is irradiated onto the head cavity mirror CM1 at a smaller elevation angle, forming a third light spot on the head cavity mirror CM1; according to the methods of steps 2 and 3, form a second light spot on the end cavity mirror CMn, completing the transmission of the second optical path;

[0053] Step 5: Follow the methods of steps 2 and 3 until m complete light spots are formed on the end cavity mirror CMn, that is, m optical paths are completed, and the total transmission distance is L = (2n-2)*l*m = 14l*4.

[0054] In the above technical solution, the light guiding method of the light guiding device is:

[0055] The first light guide mirror 3a is used for horizontal transmission of the laser beam when it is horizontally aligned with the second light guide mirror 6a or the third light guide mirror 7a. The second light guide mirror 6a and the third light guide mirror 7a are vertically arranged up and down for longitudinal transmission of the laser beam.

[0056] Compared with the prior art, the present invention has the following beneficial effects:

[0057] 1. The high-power laser long-distance transmission experimental system provided by the present invention includes a high-power laser long-distance transmission device and a light-guiding device for guiding the high-power laser from the high-power laser long-distance transmission device, and also includes a high-power laser emitter and a laser detection device. Among them, the high-power laser long-distance transmission device realizes the long-distance round-trip transmission of the high-power laser in the round-trip transmission cavity mirror group. The overall structure of the experimental system is compact and the layout is reasonable. By adjusting the number of cavities, the interval between the two cavities, and the number of round trips, the transmission distance can be maximized in a smaller experimental site, which reduces the requirements of the experimental site and improves the utilization rate of the experimental site.

[0058] 2. The high-power laser long-distance transmission experimental system provided by the present invention has a light-guiding device including a first light-guiding side and a second light-guiding side arranged opposite to each other, and realizes horizontal and vertical transmission of the laser beam through three light-guiding mirrors. The laser beam to be guided out can be guided out at a specified position without affecting the round-trip transmission optical path.

[0059] 3. The experimental method of the high-power laser long-distance transmission experimental system provided by the present invention is that the high-power laser emitted by the high-power laser transmitter is transmitted over a long distance by the high-power laser long-distance transmission device and the position where the high-power laser needs to be derived is calculated according to the long-distance transmission distance method, and then the light guide device is inserted into the position for deriving, and the light guide device derives the high-power laser to the laser detector for analysis. The cavity mirror adjustment method, the transmission distance calculation method and the high-power laser deriving method are relatively simple, and the high-power laser at different transmission distances can be derived by adjusting the position of the light guide device. BRIEF DESCRIPTION OF THE DRAWINGS

[0060] Figure 1 Shown is an axonometric view of a two-dimensionally adjustable laparoscope clamping device;

[0061] Figure 2 Shown is a side view of a two-dimensionally adjustable laparoscope clamping device;

[0062] Figure 3 Shown is a front view of a two-dimensionally adjustable laparoscope clamping device;

[0063] Figure 4 Shown is a schematic cross-sectional structure diagram of the lower adjusting screw knob assembly;

[0064] Figure 5 Shown is a schematic diagram of the structure of a high-power laser long-distance transmission device;

[0065] Among them, A-cavity mirror, B-cavity mirror clamping device, C-base, D-light guide device, E-CCD camera;

[0066] Figure 6 Shown is a schematic diagram of the long distance transmission method;

[0067] Figure 7 Shown is a schematic structural diagram of a light guide device;

[0068] Figure 8 Shown is a partial enlarged view of the first light guide side;

[0069] Fig. 9 Shown is a partial enlarged view of the second optical side.

[0070] 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 button, 4-pressing plate, 5-fixing hole, 6-lens clamping strip, 7-guide nail, 9-first screw, 10-first knob, 12-middle connecting shaft, 13-universal bearing, 14-bearing seat, 15-second threaded sleeve, 16-second screw, 17-second V-top block, 18-second knob, 19-spot positioning hole.

[0071] 1a-first column, 2a-cantilever arm, 2-1a-horizontal cantilever part, 2-2a-vertical connecting part, 2-3a-locking arm, 2-4a-45° positioning edge, 3a-first light guide mirror, 4a-first locking button, 5a-second column, 6a-second light guide mirror, 7a-third light guide mirror, 8a-second locking button, 9a-third locking button, 11a-first precision guide rail, 12a-first precision guide rail slider, 13a-second precision guide rail, 14a-upper 45° accessory, 14-1a-second precision guide rail slider, 14-2a-upper accessory locking arm, 15a-lower 45° accessory, 15-1a-third precision guide rail slider, 15-2a-lower accessory locking arm, 16a-column base. DETAILED DESCRIPTION

[0072] The present invention is 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.

[0073] Example 1

[0074] A two-dimensionally adjustable laparoscope clamping device, such as Figure 1-3 As shown, it includes a fixing bracket 1 and a laparoscope clamping assembly for clamping a laparoscope;

[0075] The laparoscope clamping assembly comprises 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;

[0076] The positioning assembly includes a transverse limiting member and a longitudinal limiting member;

[0077] The transverse limiting member is a pressing sheet 4, which is detachably mounted in front of the top of the laparoscope placement frame by four bolts to limit the laparoscope and prevent the laparoscope from sliding forward;

[0078] The longitudinal limiter includes a lens clamp 6, a guide pin 7 and a locking button 3. The lens clamp 6 is used to compress the laparoscope. The bottom of the guide pin 7 is fixed to the lens clamp 6. The pin body passes through the hole formed on the top plate 2-3. The top cap 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 button 3 is threadedly connected to the top plate 2-3. When the bottom end of the locking button 3 moves downward, it applies downward pressure to the lens clamp 6 to compress the laparoscope. In actual application, the number of the locking buttons 3 is 3, the number of the guide pins 7 is 2, and a guide pin 7 is provided between two adjacent locking buttons 3.

[0079] The laparoscope placement frame is adjustably fixed on the fixing bracket 1 through a two-dimensional adjustment component;

[0080] The two-dimensional adjustment component includes an upper adjustment screw button component, a lower adjustment screw button component and a universal bearing component. The bottom corner of the laparoscope placing frame is rotatably connected to the lower part of the fixed bracket 1 through the universal bearing component, and the top corner of the laparoscope placing frame is rotatably connected to the upper part of the fixed bracket 1 through the upper adjustment screw button component to adjust the pitch angle of the laparoscope placing frame. The upper adjustment screw button component is located directly above the universal bearing component, and the lower adjustment screw button component and the universal bearing component are located at the same horizontal height to adjust the horizontal rotation angle of the laparoscope placing frame.

[0081] When adjusting the pitch angle, after adjusting the lower adjustment screw knob assembly, the upper end of the laparoscope placement frame is pushed forward and backward by rotating the upper adjustment screw knob assembly, the bearing structure in the universal bearing assembly rotates relatively, and the rotating contact point in the lower adjustment screw knob assembly rotates relatively, thereby achieving the pitch adjustment of the laparoscope placement frame;

[0082] When adjusting the horizontal rotation angle, after adjusting the upper adjustment screw knob assembly, the side of the laparoscope placement frame is pushed forward and backward by rotating the lower adjustment screw knob assembly, the bearing structure in the universal bearing assembly rotates relatively, and the rotating contact point in the upper adjustment screw knob assembly rotates relatively to adjust the horizontal rotation angle of the laparoscope placement frame.

[0083] Specifically, the fixed bracket 1 includes a U-shaped base 1-1 and an L-shaped fixing plate 1-2 with an integrated structure (integrally formed), the upper adjusting screw button 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 adjusting screw button assembly is installed at the bottom of the L-shaped fixing plate 1-2 away from the end of the universal bearing assembly.

[0084] Specifically, the laparoscope placement frame includes a bottom bracket 2-1, a back plate 2-2 and a top plate 2-3 which are connected in one piece; the bottom bracket 2-1 is used to receive the bottom surface of the laparoscope, the back plate 2-2 is used to receive the rear side surface of the laparoscope; the locking button 3 is arranged on the top plate 2-3. The laparoscope placement frame can hold a laparoscope of 200*100*30mm, and has a large holding space.

[0085] like Figure 4 As shown, the lower adjusting screw button assembly includes a second threaded sleeve 15 embedded on the L-shaped fixing plate 1-2, a second screw 16 threadedly matched with the second threaded sleeve 15, a second knob 18 fixed to the tail end of the second screw 16, and a second V-shaped top block 17 embedded on the back plate 2-2, the tip of the second screw 16 is hemispherical, and the hemispherical tip is located in the V-shaped groove of the second V-shaped top block 17;

[0086] The structure of the upper adjusting screw button assembly is consistent with that of the lower adjusting screw button assembly, including a first threaded sleeve embedded in the L-shaped fixing plate 1-2, a first screw rod 9 threadably matched with the first threaded sleeve, a first knob 10 fixed at the tail end of the first screw rod 9, and a first V-shaped top block embedded in the back plate 2-2, wherein 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;

[0087] The L-shaped fixing plate 1-2 is connected to the back plate 2-2 via a movable connecting piece, and under the premise of ensuring that the two are not separated, an adjustment space is reserved for the upper adjustment screw button assembly and the lower adjustment screw button assembly. The movable connecting piece can be a rivet or an elastic piece.

[0088] The universal bearing assembly includes an intermediate 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 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 shaft 12 and the inner wall of the through hole so that it can rotate within a certain angle. The universal bearing 13 adopts the SKF GE15C model universal bearing, which has a small gap and high rigidity, can provide a 15° full range of activity margin, and has a large rigidity to provide a guarantee for the load-bearing of the laparoscope placement frame.

[0089] Preferably, the first threaded sleeve and the second threaded sleeve 15 are made of phosphor bronze, the first screw 9 and the second screw 16 are made of nickel-containing alloy steel, and the pitch is M10X0.25 ultra-precision pitch, thereby ensuring high resolution and high amplification torque during the adjustment process, and having obvious advantages in terms of adjustment accuracy and ease of adjustment.

[0090] Preferably, the first V-top block and the second V-top block 17 are made of SKD11 super-hard steel with a roughness of 0.8 mm, which ensures smooth movement and high reliability and stability.

[0091] Preferably, two elongated fixing holes 5 are provided on the horizontal plate of the U-shaped base 1 - 1, which can be adjusted and fixed on the base or other specific positions.

[0092] 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 for adjusting the light spot position during laser transmission.

[0093] Example 2

[0094] A high-power laser long-distance transmission device, such as Figure 5As shown, it includes a round-trip transmission laparoscope group consisting of an even number of laparoscopes arranged in pairs, and each laparoscope A is set on a base C through a two-dimensionally adjustable laparoscope clamping device B described in Example 1.

[0095] The cavity mirror A is plated with a high-power dielectric film with a reflectivity greater than 99%.

[0096] Example 3

[0097] The long-distance transmission method of the high-power laser long-distance transmission device described in Example 2 comprises the following steps:

[0098] Step 1: After being reflected by the introduction cavity mirror CM, the high-power laser beam passes through the aperture below the cavity mirror clamping device corresponding to the end cavity mirror CMn in the cavity mirror group, and irradiates the head cavity mirror CM1 at a small elevation angle, forming the first light spot on the head cavity mirror CM1;

[0099] Step 2: sequentially adjust the left and right and elevation angles of each cavity mirror in the round-trip transmission cavity mirror group, so that the high-power laser beam is sequentially transmitted from the first cavity mirror (CM1) to the second-to-last cavity mirror CMn-1, and the first light spot is formed on each cavity mirror, completing the transmission of the first half of the optical path;

[0100] Step 3: Adjust the left and right and elevation angles of the second-to-last cavity mirror CMn-1, so that the high-power laser beam is transmitted from the second-to-last cavity mirror CMn-1 to the end cavity mirror in sequence along an optical path slightly higher than the first half of the optical path, forming a second light spot from the third-to-last cavity mirror CMn-1 to the head cavity mirror CM1, and forming the first light spot on the end cavity mirror CMn, completing the transmission of the first optical path;

[0101] Step 4: Adjust the left and right and elevation angles of the end cavity mirror (CMn) so that the high-power laser beam is irradiated onto the head cavity mirror CM1 at a smaller elevation angle, forming a third light spot on the head cavity mirror CM1; according to the methods of steps 2 and 3, form a second light spot on the end cavity mirror CMn, completing the transmission of the second optical path;

[0102] Step 5: Follow the methods of steps 2 and 3 until m complete light spots are formed on the end cavity mirror CMn, that is, m optical paths are completed, and the total transmission distance is L = (2n-2)*l*m = 14l*4.

[0103] The high-power laser long-distance transmission device can reasonably adjust the number of cavity mirrors according to the site size or transmission distance requirements. Taking 8 cavity mirrors as an example, the long-distance transmission method of the high-power laser long-distance transmission device is as follows: Figure 6 As shown,

[0104] First, it is defined that the first end laparoscope CM1 and the end laparoscope CM8 are arranged opposite to each other, and the second laparoscope CM2 to the seventh laparoscope CM7 are arranged alternately in sequence;

[0105] After being reflected by the introduction cavity mirror M1, the high-power laser beam irradiates the head-end cavity mirror CM1, forming the first light spot on the mirror surface of the head-end cavity mirror CM1.

[0106] Adjust the two-dimensional angle of the cavity mirror clamping device corresponding to the cavity mirror CM1, so that the high-power laser beam is reflected from the first cavity mirror CM1 to the second cavity mirror CM2, forming the first light spot on the mirror surface of the cavity mirror CM2;

[0107] Adjust the two-dimensional angle of the cavity mirror clamping device corresponding to the second cavity mirror CM2, so that the high-power laser beam is reflected by the second cavity mirror CM2 to the third cavity mirror CM3, and the first light spot is formed on the mirror surface of the third cavity mirror CM3;

[0108] By analogy, when the two-dimensional angle of the cavity mirror clamping device corresponding to the sixth cavity mirror CM6 is adjusted, the first light spot is formed on the mirror surface of the seventh cavity mirror CM7, and the first half of the optical path is completed; then the high-power laser beam is reflected back to the sixth cavity mirror CM6 through the seventh cavity mirror CM7, and the second light spot is formed on the mirror surface of the sixth cavity mirror CM6. The two-dimensional angle of the cavity mirror clamping device corresponding to the seventh cavity mirror CM7 is adjusted so that the second light spot on the sixth cavity mirror CM6 is located directly above the first light spot;

[0109] At this time, the returned high-power laser returns to the cavity mirror CM1 along an optical path slightly higher than the first half of the optical path, and then reflects to the end cavity mirror CM8, forming the first light spot at the center below the end cavity mirror CM8. After 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 cavity mirrors arranged opposite to each other;

[0110] Then, the two-dimensional angle of the cavity mirror holding device corresponding to the cavity mirror CM8 is adjusted, and a second light spot is formed on the cavity mirror CM8 according to the above process, and the second light path is completed;

[0111] And so on, until four light spots are formed on the cavity mirror CM8, that is, four optical paths are completed, the total transmission distance is L=(2n-2)*l*m=64l.

[0112] The above-mentioned high-power laser long-distance transmission method adopts a round-trip transmission method composed of multiple cavity mirrors. The transmission distance can be maximized in a limited test site by changing the number of cavity mirrors n, the distance l between two relatively set cavity mirrors, and the number of light spots m on the cavity mirror at the end of a single-way transmission.

[0113] After being reflected by the introduction cavity mirror M1, the high-power laser beam passes through the hole in the middle of the U-shaped base (1-1) in the two-dimensionally adjustable cavity mirror clamping device corresponding to the end cavity mirror CM8, and irradiates the head cavity mirror CM1 at an elevation angle of no more than 1°.

[0114] Preferably, the first light spot on each laparoscope is located in the center of the laparoscope, and the distance from the lower edge of the laparoscope is 1.5-2.5 mm, preferably 2 mm, and the position of the light spot positioning hole set on the back plate of the laparoscope placement frame can be referred to.

[0115] Preferably, the second light spot on each cavity mirror is located directly above the first light spot, and the distance between the lower edge tangent of the second light spot and the upper edge tangent of the first light spot is 2-4mm, preferably 3mm, which can refer to the position of the light spot positioning hole set on the back plate of the cavity mirror placement frame.

[0116] Example 4

[0117] A light guide device, such as Figure 7 As shown, it includes a first light guiding side and a second light guiding side which are arranged opposite to each other;

[0118] The first light-guiding side includes a first column 1a, a cantilever arm 2a assembled on the first column 1a through a first longitudinal sliding positioning mechanism, and a first light guide mirror 3a installed under the cantilever arm 2a; the second light-guiding side includes a second column 5a and a second light guide mirror 6a and a third light guide mirror 7a assembled on the second column 5a through a second longitudinal sliding positioning mechanism.

[0119] The first light guide mirror 3a is used for horizontal transmission of the laser beam when it is horizontally aligned with the second light guide mirror 6a or the third light guide mirror 7a. The second light guide mirror 6a and the third light guide mirror 7a are vertically arranged up and down for longitudinal transmission of the laser beam.

[0120] The light guide device is used to change the transmission direction of the light path and guide the laser beam out of the high-power laser long-distance transmission device described in Example 2. The arrangement of the first light guide mirror 3a, the second light guide mirror 6a and the third light guide mirror 7a realizes the dual adjustment of the laser beam in the horizontal and longitudinal directions.

[0121] The first light guide mirror 3a, the second light guide mirror 6a and the third light guide mirror 7a each include a mirror frame and a light guide mirror adjustably mounted on the mirror frame.

[0122] Specifically, the first longitudinal sliding positioning mechanism includes a first precision guide rail 11a vertically installed on the first column 1a, and a first precision guide rail slider 12a and a first locking button 4a fixedly installed at the end of the cantilever arm 2a. The first precision guide rail slider 12a slides along the first precision guide rail 11a, and the first locking button 4a locks the cantilever arm 2a on the first column 1a.

[0123] Specifically, if Figure 8 As shown, the cantilever arm 2a includes a horizontal cantilever portion 2-1a and a vertical connection portion 2-2a, the first light guide 3a is fixedly mounted below the end of the horizontal cantilever portion 2-1a, and the first precision guide rail slider 12a is fixedly mounted on the side of the vertical connection portion 2-2a.

[0124] Specifically, locking arms 2-3a are respectively installed on the front and rear sides of the vertical connection part 2-2a, and the first locking button 4a is two locking bolts. Each of the locking bolts passes through a locking arm 2-3a and is locked on the first column 1a.

[0125] The end of the horizontal cantilever beam part 2-1a is wedge-shaped, and the end away from the vertical connection part 2-2a is smaller. The thickness of the wedge-shaped solid material is processed, and its rigidity and stability meet the requirements of high-power laser transmission and derivation.

[0126] Specifically, a 45° positioning edge is provided at the end of the horizontal cantilever beam portion 2-1a. When the frame of the first light guide mirror 3a is aligned with the 45° positioning edge, the first light guide mirror 3a is inclined at 45°, which is convenient for adjusting the angle of the first light guide mirror 3a and facilitating installation.

[0127] Specifically, if Fig. 9 As shown, a second precision guide rail 13a is installed on the side of the second column 5a, and the second light guide mirror 6a is fixedly installed on the upper 45° attachment 14a. The upper 45° attachment 14a is formed with a 45° inclined surface for assembling the second light guide mirror 6a. When the frame of the second light guide mirror 6a is aligned with the 45° inclined surface, the second light guide mirror 6a is inclined at 45°. The second precision guide rail slider 14-1a in the upper 45° attachment 14a is slidably connected to the second precision guide rail 13a;

[0128] The third light guide mirror 7a is fixedly mounted on the lower 45° attachment 15a. The third precision guide rail slider 15-1a in the lower 45° attachment 15a is slidably connected to the second precision guide rail 13a and is located below the second precision guide rail slider 14-1a.

[0129] Specifically, upper accessory locking arms 14-2a are respectively installed on the front and rear sides of the upper 45° accessory 14a, and the second locking button 8a is two locking bolts, each of which passes through one of the upper accessory locking arms 14-2a and is locked on the second column 5a;

[0130] The front and rear sides of the lower 45° accessory 15a are respectively installed with lower accessory locking arms 15-2a, and the third locking button 9a is two locking bolts, each of which passes through one of the lower accessory locking arms 15-2a and is locked on the second column 5a.

[0131] Specifically, the bottom ends of the first column 1a and the second column 5a are fixed on the column base 16a, and the overall structure is more stable.

[0132] Specifically, the frames used in the first light guide mirror 3a, the second light guide mirror 6a and the third light guide mirror 7a are quick-release frames.

[0133] Example 5

[0134] A high-power laser long-distance transmission experimental system, such as Figure 5 As shown, it includes a high-power laser transmitter (not shown), the high-power laser long-distance transmission device described in Example 2, the light guiding device D for exporting the high-power laser described in Example 3, and a laser detection device (i.e., CCD camera E) for receiving the high-power laser exported by the light guiding device and performing analysis.

[0135] After being introduced into the cavity mirror, the high-power laser is irradiated into the high-power laser long-distance transmission device at an elevation angle of 0.5 degrees. After being transmitted back and forth over a long distance by the high-power laser long-distance transmission device, it is exported by the light guiding device to the CCD camera to measure various parameters of the high-power laser after long-distance transmission.

[0136] According to the transmission distance calculation formula L=(2n-2)*l*m in Example 2, the position where the high-power laser needs to be derived is calculated, and then the light guiding device is inserted into the position for deriving.

[0137] The above is only a preferred embodiment of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A high-power laser long-distance transmission experimental system, characterized in that: It comprises a high-power laser long-distance transmission device and a light guide device for guiding the high-power laser from the high-power laser long-distance transmission device; The high-power laser long-distance transmission device comprises a round-trip transmission cavity mirror group consisting of an even number of cavity mirrors arranged in pairs, each cavity mirror being arranged on a base through a cavity mirror clamping device that can be adjusted in two dimensions to adjust the pitch angle and left-right angle of the cavity mirror; The light guiding device comprises a first light guiding side and a second light guiding side which are arranged opposite to each other; The first light-guiding side comprises a first column (1a), a cantilever arm (2a) assembled on the first column (1a) through a first longitudinal sliding positioning mechanism, and a first light-guiding mirror (3a) installed below the cantilever arm (2a); The second light-guiding side comprises a second column (5a) and a second light-guiding mirror (6a) and a third light-guiding mirror (7a) assembled on the second column (5a) via a second longitudinal sliding positioning mechanism; The first light guide mirror (3a) and the second light guide mirror (6a) are arranged opposite to each other, and the second light guide mirror (6a) is located directly above the third light guide mirror (7a); After being transmitted over a long distance by the reciprocating transmission cavity mirror group, the high-power laser is guided out by the first light guide mirror (3a), the second light guide mirror (6a) and the third light guide mirror (7a); The laparoscope clamping device comprises a fixing bracket (1) and a laparoscope clamping assembly for clamping the laparoscope; The laparoscope clamping assembly comprises a laparoscope placement frame for placing the laparoscope and a positioning assembly for positioning the laparoscope on the laparoscope placement frame; The laparoscope placement frame is adjustably fixed on the fixing bracket (1) via a two-dimensional adjustment component; The two-dimensional adjustment component comprises an upper adjustment screw button component, a lower adjustment screw button component and a universal bearing component, a bottom corner of the laparoscope placement frame is rotatably connected to the lower part of the fixed bracket (1) through the universal bearing component, and a top corner of the laparoscope placement frame is rotatably connected to the upper part of the fixed bracket (1) through the upper adjustment screw button component, and the upper adjustment screw button component is located directly above the universal bearing component to adjust the pitch angle of the laparoscope placement frame; The other bottom corner of the laparoscope placement frame is rotatably connected to the lower part of the fixed bracket (1) through the lower adjustment screw assembly, and the lower adjustment screw assembly and the universal bearing assembly are located at the same horizontal height to adjust the horizontal rotation angle of the laparoscope placement frame.

2. The high-power laser long-distance transmission experimental system as claimed in claim 1, characterized in that: The cavity mirror is plated with a high-power dielectric film with a reflectivity greater than 99%.

3. The high-power laser long-distance transmission experimental system as claimed in claim 1, characterized in that: The fixing bracket (1) comprises a U-shaped base (1-1) and an L-shaped fixing plate (1-2) in an integrated structure; the upper adjusting screw button assembly is mounted on the top of the L-shaped fixing plate (1-2); the universal bearing assembly is mounted at a bending angle of the L-shaped fixing plate (1-2); and the lower adjusting screw button assembly is mounted at the bottom of the L-shaped fixing plate (1-2) at an end away from the universal bearing assembly.

4. The high-power laser long-distance transmission experimental system as claimed in claim 3, characterized in that: The laparoscope placement frame comprises a bottom support (2-1) for receiving the bottom surface of the laparoscope, a back plate (2-2) for receiving the rear side surface of the laparoscope, and a top plate (2-3).

5. The high-power laser long-distance transmission experimental system as claimed in claim 4, characterized in that: The positioning assembly includes a transverse limiting member and a longitudinal limiting member; The transverse limiting member is a pressing sheet (4) installed in front of the top plate (2-3); The longitudinal limiting member comprises a lens clamp (6) for pressing the cavity mirror, a guide pin (7) for installing the lens clamp (6) below the top plate (2-3), and a locking button (3) threadedly connected to the top plate (2-3); when the locking button (3) is screwed downward, downward pressure is applied to the lens clamp (6) to press the cavity mirror.

6. The high-power laser long-distance transmission experimental system as claimed in claim 4, characterized in that: The upper adjusting screw knob assembly comprises a first threaded sleeve embedded on the L-shaped fixing plate (1-2), a first screw rod (9) threadably matched with the first threaded sleeve, a first knob (10) fixed at the tail end of the first screw rod (9), and a first V-shaped top block embedded on the back plate (2-2), wherein the tip of the first screw rod (9) is hemispherical and the hemispherical tip is located in a V-shaped groove of the first V-shaped top block; The lower adjusting screw knob assembly comprises a second threaded sleeve (15) embedded on the L-shaped fixing plate (1-2), a second screw rod (16) threadably matched with the second threaded sleeve (15), a second knob (18) fixed at the tail end of the second screw rod (16), and a second V-shaped top block (17) embedded on the back plate (2-2), wherein the tip of the second screw rod (16) is hemispherical and the hemispherical tip is located in a 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 via a movable connecting piece; The universal bearing assembly comprises 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 a 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); the other end is fixed to the universal bearing (13) by means of bolts; a gap exists between the side wall of the intermediate connecting shaft (12) and the inner wall of the through hole so that the intermediate connecting shaft (12) can rotate within a certain angle.

7. The high-power laser long-distance transmission experimental system as claimed in claim 5, characterized in that: Light spot positioning holes (19) are formed at corresponding positions of the back plate (2-2) and the L-shaped fixing plate (1-2) to provide a reference for adjusting the light spot position during laser transmission.

8. The high-power laser long-distance transmission experimental system as claimed in claim 1, characterized in that: The first longitudinal sliding positioning mechanism comprises a first precision guide rail (11a) vertically mounted on the first column (1a), and a first precision guide rail slider (12a) and a first locking button (4a) fixedly mounted on the end of the cantilever arm (2a); the first precision guide rail slider (12a) slides along the first precision guide rail (11a), and the first locking button (4a) locks the cantilever arm (2a) on the first column (1a).

9. The high-power laser long-distance transmission experimental system as claimed in claim 8, characterized in that: The cantilever beam arm (2a) comprises a horizontal cantilever beam portion (2-1a) and a vertical connection portion (2-2a); the first light guide mirror (3a) is fixedly mounted below the end of the horizontal cantilever beam portion (2-1a); and the first precision guide rail slider (12a) is fixedly mounted on the side of the vertical connection portion (2-2a).

10. The high-power laser long-distance transmission experimental system as claimed in claim 9, characterized in that: The front and rear sides of the vertical connection part (2-2a) are respectively provided with locking arms (2-3a); the first locking button (4a) is two locking bolts, each of the locking bolts passes through one of the locking arms (2-3a) and is locked on the first column (1a); The horizontal suspension beam part (2-1a) is wedge-shaped, and the end away from the vertical connection part (2-2a) is smaller; The end of the horizontal suspension beam part (2-1a) is provided with a 45° positioning edge (2-4a), and when the frame of the first light guide mirror (3a) is aligned with the 45° positioning edge (2-4a), the first light guide mirror (3a) is inclined at 45°.

11. The high-power laser long-distance transmission experimental system as claimed in claim 8, characterized in that: The second longitudinal sliding positioning mechanism comprises a second precision guide rail (13a) installed on the side of the second column (5a), an upper 45° attachment (14a) for fixing the second light guide mirror (6a), a lower 45° attachment (15a) for fixing the third light guide mirror (7a), and a second locking button (8a) and a third locking button (9a) for fixing the upper 45° attachment (14a) and the lower 45° attachment (15a) on the second column (5a) respectively; The second precision guide rail slider (14-1a) in the upper 45° attachment (14a) and the third precision guide rail slider (15-1a) in the lower 45° attachment (15a) are respectively slidably connected to the second precision guide rail (13a).

12. The high-power laser long-distance transmission experimental system according to claim 11, characterized in that: The front and rear sides of the upper 45° accessory (14a) are respectively provided with upper accessory locking arms (14-2a); the second locking button (8a) is two locking bolts, each of which passes through one of the upper accessory locking arms (14-2a) and is locked on the second column (5a); The front and rear sides of the lower 45° accessory (15a) are respectively provided with lower accessory locking arms (15-2a), and the third locking button (9a) is two locking bolts, each of which passes through one of the lower accessory locking arms (15-2a) and is locked on the second column (5a).

13. The high-power laser long-distance transmission experimental system as claimed in claim 8, characterized in that: The bottom ends of the first column (1a) and the second column (5a) are fixed on a column base (16a).

14. The high-power laser long-distance transmission experimental system as claimed in claim 1, characterized in that: It also includes a high-power laser transmitter and a laser detection device.

15. The experimental method of the high-power laser long-distance transmission experimental system according to claim 14, characterized in that: The high-power laser emitted by the high-power laser transmitter is transmitted over a long distance through the high-power laser long-distance transmission device and the position where the high-power laser needs to be exported is calculated according to the long-distance transmission distance method, and then the light guide device is inserted into the position for export. The light guide device exports the high-power laser to the laser detector for analysis.

16. The experimental method according to claim 15, characterized in that The long distance transmission method comprises the following steps: Step 1: After being reflected by the introduction cavity mirror (CM), the high-power laser beam passes through the aperture below the cavity mirror clamping device corresponding to the end cavity mirror (CMn) in the cavity mirror group, and irradiates the head cavity mirror (CM1) at a small elevation angle, forming the first light spot on the head cavity mirror (CM1); Step 2: sequentially adjust the left and right and elevation angles of each cavity mirror in the round-trip transmission cavity mirror group, so that the high-power laser beam is sequentially transmitted from the first cavity mirror (CM1) to the second to last cavity mirror (CMn-1), and the first light spot is formed on each cavity mirror, completing the transmission of the first half of the optical path; Step 3: Adjust the left and right and pitch angles of the penultimate cavity mirror (CMn-1) so that the high-power laser beam is transmitted from the penultimate cavity mirror (CMn-1) to the end cavity mirror in sequence along an optical path slightly higher than the first half of the optical path, forming a second light spot from the penultimate cavity mirror (CMn-1) to the head cavity mirror (CM1), and forming a first light spot on the end cavity mirror (CMn), completing the transmission of the first optical path; Step 4: Adjust the left and right and elevation angles of the end cavity mirror (CMn) so that the high-power laser beam is irradiated onto the head cavity mirror (CM1) at a smaller elevation angle, forming a third light spot on the head cavity mirror (CM1); according to the methods of steps 2 and 3, form a second light spot on the end cavity mirror (CMn) to complete the transmission of the second optical path; Step 5: Follow the methods of steps 2 and 3 until m complete light spots are formed on the end cavity mirror (CMn), that is, m optical paths are completed, and the total transmission distance is L = (2n-2)*l*m = 14l*4.

17. The experimental method according to claim 16, characterized in that: The light guiding method of the light guiding device is: The first light guide mirror (3a) is used for horizontal transmission of the laser beam when it is aligned with the second light guide mirror (6a) or the third light guide mirror (7a); the second light guide mirror (6a) and the third light guide mirror (7a) are arranged vertically up and down and are used for longitudinal transmission of the laser beam.

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