A device and method for continuously attenuating the energy of a light beam

Abstract

The present invention relates to a device and method for continuously attenuating the energy of a light beam, belonging to the technical field of optoelectronic devices. It solves the problems of a relatively small change range of the energy output by the light source of the optoelectronic device and the uneven output of the energy in the attenuation area. It includes an attenuation sheet, a slave gear, a master gear, a base, a driving shaft and a driven shaft. The driving shaft is arranged on the front side of the base, and the driven shafts are arranged on both sides of the base respectively. One end of the driving shaft is connected to the master gear, one end of the driven shaft is connected to the slave gear, the master gear meshes with the slave gear, and the attenuation sheet is arranged on the driven shaft. The present invention can achieve a uniform and continuous output of energy. Two continuously variable attenuation sheets are installed in a reverse complementary manner, and high-precision gear meshing transmission is adopted. When in use, turn the knob, the master gear drives the slave gear to realize the reverse synchronous rotation of the attenuation sheet, so that the attenuation transmittance in the overlapping area compensates each other, achieving a uniform and continuous output of energy. It has a high integration degree, a small volume, a large attenuation magnification range, reduces the control structure, and improves the stability.

Description

Technical Field

[0001] The present invention relates to a continuous attenuation device and method, belonging to the technical field of optoelectronic devices. Background Art

[0002] The energy continuous attenuation device is an important component for adjusting the light source energy in optoelectronic devices, and its main function is to precisely and continuously attenuate the light source energy. For example, the publication number is CN216622841U, and the invention creation name is a laser attenuator and a laser output power control device. Its technical solution is to control the rotation of the driving mechanism to control the rotation angle of the attenuation area, so as to realize the continuous adjustment and precise control of the laser output power. However, the change range of the light source output power of its optoelectronic device is relatively small, usually less than 40dB, while the light source energy of the optoelectronic device usually needs to be continuously changed in a large range of 80dB in real time and accurately to meet the requirements of optoelectronic device testing and simulation. And the general continuously variable attenuation film is a single-piece circular film, with a 270° attenuation area plated with a continuously gradually changing transmittance attenuation film, and the attenuation range is 0.4 - 40dB. When attenuating a larger beam diameter, the light passing area becomes larger, and the energy output in the attenuation area is non-uniform. Therefore, the single-piece continuously variable attenuator cannot meet the optoelectronic devices and testing environments with larger attenuation magnification and uniform energy output for a larger beam diameter.

[0003] Based on the above problems, it is urgent to propose a beam energy continuous attenuation device and method to solve the above technical problems. Summary of the Invention

[0004] The present invention provides a beam energy continuous attenuation device and method. The problems solved by the research and development of the present invention are the relatively small change range of the light source output energy of optoelectronic devices and the non-uniform energy output in the attenuation area. A brief overview of the present invention is given below to provide a basic understanding of certain aspects of the present invention. It should be understood that this overview is not an exhaustive overview of the present invention. It is not intended to identify the key or important parts of the present invention, nor is it intended to limit the scope of the present invention.

[0005] Technical Solution of the Present Invention:

[0006] A beam energy continuous attenuation device includes an attenuation film, a slave gear, a master gear, a base, a driving shaft and a driven shaft. The driving shaft is arranged on the front side of the base, and the driven shafts are arranged on both sides of the base. One end of the driving shaft is connected to the master gear, one end of the driven shaft is connected to the slave gear, the master gear meshes with the slave gear, and the attenuation film is arranged on the driven shaft.

[0007] Preferably: The attenuation film is a continuously variable attenuation film.

[0008] Preferably, it further includes a limit rod, a positioning sleeve, and a positioning bracket. Positioning sleeves are provided on both the front and rear sides of the base. The positioning sleeves are circular. Two positioning brackets are provided on the left and right sides of the base. An arc surface that cooperates with the positioning sleeve is provided on the inner end surface of the positioning bracket. Arc grooves are provided on both the front and rear sides of the positioning bracket. Limit rods are provided on both the front and rear sides of the base. The limit rods are located in the arc grooves and are slidably connected to the arc grooves. The positioning bracket is connected to the driven shaft.

[0009] Preferably, it further includes a pedestal bearing, a driven shaft locking nut, an attenuation sheet locking nut, an attenuation sheet mounting seat, a positioning seat, a knob, and a housing. The base is provided in the housing through countersunk head screws. A positioning bracket is provided between the base and the housing. Positioning sleeves are provided on both the front and rear sides of the base through bolts. The positioning seat is fixed to the front positioning sleeve by screws. The driving shaft sequentially passes through the front positioning sleeve and the positioning seat and extends out. The extending end of the driving shaft is connected to the knob. The driven shaft is connected to the positioning bracket through a pedestal bearing. The attenuation sheet is fixed to the attenuation sheet mounting seat through the attenuation sheet locking nut. The attenuation sheet mounting seat is fixed to the driven shaft.

[0010] Preferably, the knob is provided with scales, and the positioning seat is provided with marks.

[0011] A method for continuously attenuating the beam energy includes the following steps:

[0012] Step 1: Adjustment of the position of the attenuation sheet:

[0013] Adjust the positioning bracket so that the two attenuation sheets form an included angle θ.

[0014] Step 2: Adjustment of the overlapping area of the attenuation sheets:

[0015] Rotate the knob, and the two attenuation sheets rotate in the opposite direction synchronously.

[0016] The present invention has the following beneficial effects:

[0017] The present invention realizes that the energy can be output uniformly and continuously. Two continuously variable attenuation sheets are installed in a reverse complementary manner. High-precision gear meshing transmission is adopted. When in use, rotate the knob, and the main gear drives the driven gear to realize the reverse synchronous rotation of the attenuation sheets, so that the attenuation transmittance in the overlapping area compensates each other, realizing the uniform and continuous output of energy. It has a high integration degree, a small volume, a large attenuation magnification range, reduces the control structure, and improves the stability;

[0018] The attenuation sheet of the present invention forms a certain included angle with the optical axis of the transmitted light and is installed in a reverse complementary manner, which can provide continuous and uniform attenuation, effectively removes the reflected light caused by the mirror surface of the attenuation sheet from the optical path, and avoids ghost images. Description of the Drawings

[0019] Figure 1 It is a schematic diagram of a device for continuously attenuating the beam energy provided by the present invention;

[0020] Figure 2 Side view of a beam energy continuous attenuation device provided by the present invention;

[0021] Figure 3 Cross-sectional view of a beam energy continuous attenuation device provided by the present invention;

[0022] Figure 4 Schematic diagram of a beam energy continuous attenuation device provided by the present invention;

[0023] Figure 5 Schematic diagram of the arrangement of attenuation sheets provided by the present invention;

[0024] Figure 6 External view of a beam energy continuous attenuation device provided by the present invention.

[0025] In the figure: 1 - attenuation sheet, 3 - limit rod, 4 - driven gear, 5 - main gear, 6 - pedestal bearing, 7 - positioning sleeve, 8 - driven shaft locking nut, 9 - attenuation sheet locking nut, 10 - base, 11 - positioning bracket, 13 - driving shaft, 14 - driven shaft, 15 - attenuation sheet mounting seat, 18 - positioning seat, 19 - knob, 20 - housing. Detailed implementation manners

[0026] To make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be described below through specific embodiments shown in the accompanying drawings. However, it should be understood that these descriptions are only exemplary and are not intended to limit the scope of the present invention. In addition, in the following description, descriptions of well-known structures and technologies are omitted to avoid unnecessarily confusing the concepts of the present invention.

[0027] The connections mentioned in the present invention are divided into fixed connections and detachable connections. The fixed connection is an inseparable connection, including but not limited to conventional fixed connection methods such as hemming connection, riveting connection, bonding connection and welding connection. The detachable connection includes but not limited to conventional disassembly methods such as threaded connection, snap connection, pin connection and hinge connection. When the specific connection method is not clearly defined, it is defaulted that at least one connection method can always be found among the existing connection methods to achieve this function, and those skilled in the art can select according to their needs. For example: welding connection is selected for fixed connection, and hinge connection is selected for detachable connection.

[0028] Detailed implementation manner one: In combination with Figures 1 - 6Description of this embodiment. A beam energy continuous attenuation device of this embodiment includes an attenuation sheet 1, a slave gear 4, a master gear 5, a base 10, a driving shaft 13 and a driven shaft 14. The driving shaft 13 is arranged on the front side of the base 10, and the driven shafts 14 are arranged on both sides of the base 10 respectively. One end of the driving shaft 13 is connected to the master gear 5, and one end of the driven shaft 14 is connected to the slave gear 4. The master gear 5 meshes with the slave gear 4, and the attenuation sheet 1 is arranged on the driven shaft 14. A beam of uniform parallel light passes through this device, and the energy can be output uniformly and continuously. Two continuously variable attenuation sheets are installed in a reverse complementary manner. High-precision gear meshing transmission is adopted. When in use, turn the knob, and the master gear 5 drives the slave gear 4 to realize the reverse synchronous rotation of the attenuation sheet, so that the attenuation transmittance in the overlapping area compensates each other, realizing the uniform and continuous output of energy. It has high integration, small volume, a large attenuation magnification range, which is 1 - 80 dB, high-precision gear meshing transmission, reduces the control structure, improves the stability, and has a wide application range; it strengthens the synchronism of the two attenuation sheets.

[0029] The attenuation sheet 1 is a continuously variable attenuation sheet. The two attenuation sheets 1 form an angle θ, θ = θ1 + θ2, where θ1 is the inclination angle of one attenuation sheet and θ2 is the inclination angle of the other attenuation sheet. As Figure 5 shown, the two continuously variable attenuation sheets are installed in a reverse complementary manner. The coated surface of the attenuation sheet 1 is located on the outer side. The attenuation sheet 1 is a circular attenuation sheet, and the inner and outer surfaces of the attenuation sheet are parallel. The two continuously variable attenuation sheets coincide at the highest optical density (the 270° lines coincide), and the coated areas are collinear (the 0° lines coincide). Under the high-precision bevel gear meshing transmission, they can rotate in reverse synchronously. The attenuation transmittance in the overlapping area compensates each other, realizing uniform and continuous attenuation in the range of 0 - 80 dB. While ensuring high precision, it greatly reduces the operation difficulty and saves a lot of time.

[0030] It further includes a limiting rod 3, a positioning sleeve 7 and a positioning bracket 11. The positioning sleeves 7 are arranged on the front and rear sides of the base 10 respectively. The positioning sleeve 7 is circular. The two positioning brackets 11 are arranged on the left and right sides of the base 10. An arc surface 111 matching with the positioning sleeve 7 is arranged on the inner end surface of the positioning bracket 11. Arc grooves 112 are arranged on the front and rear sides of the positioning bracket 11. The arc surface 111, the arc grooves 112 and the positioning sleeve 7 are coaxially arranged. Limiting rods 3 are arranged on the front and rear sides of the base 10. The limiting rods 3 are located in the arc grooves 112 and are slidably connected with the arc grooves 112 to make the angles of the two continuous variable attenuation sheets consistent with the optical axis. Threads are arranged at the ends of the limiting rods 3. The limiting rods 3 are connected with nuts through the threads at the ends, which can be used to fix the limiting rods 3. The positioning brackets 11 are connected with the driven shaft 14; the attenuation sheets form a certain angle with the light transmission optical axis and are installed in a reverse complementary manner, which can provide continuous and uniform attenuation, effectively remove the reflected light caused by the mirror surface of the attenuation sheet from the optical path and avoid ghost images; rotate the nut, rotate the positioning bracket 11 to the specified position, and reverse-rotate the nut to fix the positioning bracket 11. The two attenuation sheets form certain angles θ1 and θ2 with the light transmission optical axis, and at the same time ensure the correct meshing of the high-precision bevel gears, effectively eliminate the ghost images generated by the reflected light in the optical system, and meet the optoelectronic devices and test environments with large attenuation magnification and large beam diameter energy output.

[0031] It also includes a pedestal bearing 6, a driven shaft locking nut 8, an attenuation sheet locking nut 9, an attenuation sheet mounting seat 15, a positioning seat 18, a knob 19 and a housing 20. The base 10 is arranged in the housing 20 through countersunk head screws. The housing 20 is square. A positioning bracket 11 is arranged between the base 10 and the housing 20. Positioning sleeves 7 are arranged on the front and rear sides of the base 10 through bolts. The positioning seat 18 is fixed on the front positioning sleeve 7 through screws. The driving shaft 13 sequentially passes through the front positioning sleeve 7 and the positioning seat 18 and extends out. The extending end of the driving shaft 13 is connected to the knob 19. The knob 19 is fixed on the driving shaft 13 with a set screw. The driven shaft 14 is connected to the positioning bracket 11 through a pedestal bearing 6. The driven shaft 14 is arranged on the pedestal bearing 6 through a driven shaft locking nut 8. The attenuation sheet 1 is fixed on the attenuation sheet mounting seat 15 through an attenuation sheet locking nut 9. The attenuation sheet mounting seat 15 is fixed on the driven shaft 14 with a set screw. The high-precision gear is fixed on the driven shaft 14 with a set screw. The attenuation sheet 1 is located inside the base 10. In the prior art, a common continuously variable attenuation sheet is a single-piece circle, and a continuously variable transmittance attenuation film is plated on the 270° attenuation area. It linearly increases starting from the 0° coating position and reaches the highest optical density at 270°. The attenuation range is 0.4 - 40 dB. When the beam diameter attenuates greatly, the light passing area becomes larger, and the energy in the attenuation area is output unevenly. However, this device adopts two continuously variable attenuation sheets installed in a reverse complementary manner. A reasonable installation structure enables the continuously variable attenuation sheet to be installed at a certain angle with the light axis of the transmitted light. The gears are correctly meshed and rotate stably in reverse synchronously, so that the attenuation transmittance in the overlapping area compensates each other, solving the technical defects of synchronous reverse rotation and non-uniform continuous attenuation of the two continuously variable attenuation sheets. This device is applicable to light sources of various wavelengths. The parallel light passing through the light energy attenuation device is attenuated evenly and continuously without the need for multiple sets of attenuation motion actuators and multiple attenuation sheets. It has a small volume, high stability, and high reliability. It can attenuate evenly and continuously in a large range (0 - 80 dB), and can also calibrate fixed attenuation ratio gears within the attenuation ratio range.

[0032] The knob 19 is provided with scales, and the positioning seat 18 is provided with marks. The visualization of the attenuation ratio is realized by observing the positional relationship between the scales of the knob 19 and the marks. The linearity and reliability are improved, continuous adjustment and precise control can be achieved, the attenuation gears can be calibrated, and the step-variable attenuation mode can be compatible.

[0033] Specific Embodiment 2: In combination with Figures 1 - 6Description of this embodiment. A method for continuously attenuating the beam energy in this embodiment uses a device for continuously attenuating the beam energy, which includes an attenuation sheet 1, a slave gear 4, a master gear 5, a base 10, a driving shaft 13 and a driven shaft 14. The driving shaft 13 is arranged on the front side of the base 10, and the driven shafts 14 are arranged on both sides of the base 10 respectively. One end of the driving shaft 13 is connected to the master gear 5, and one end of the driven shaft 14 is connected to the slave gear 4. The master gear 5 meshes with the slave gear 4, and the attenuation sheet 1 is arranged on the driven shaft 14. A beam of uniform parallel light passes through this device, and the energy can be output uniformly and continuously. Two continuously variable attenuation sheets are installed in a reverse complementary manner. High-precision gear meshing transmission is adopted. When in use, turn the knob, and the master gear 5 drives the slave gear 4 to realize the reverse synchronous rotation of the attenuation sheet, so that the attenuation transmittance in the overlapping area compensates each other, realizing the uniform and continuous output of energy. It has high integration, small volume, a large attenuation magnification range, which is 1 - 80 dB, high-precision gear meshing transmission, reduces the control structure, improves the stability, and has a wide range of applications; it strengthens the synchronism of the two attenuation sheets.

[0034] The attenuation sheet 1 is a continuously variable attenuation sheet. The two attenuation sheets 1 form an angle θ, θ = θ1 + θ2, where θ1 is the inclination angle of one attenuation sheet and θ2 is the inclination angle of the other attenuation sheet. As Figure 5 shown, the two continuously variable attenuation sheets are installed in a reverse complementary manner. The coated surface of the attenuation sheet 1 is located on the outer side. The attenuation sheet 1 is a circular attenuation sheet, and the inner and outer surfaces of the attenuation sheet are parallel. The two continuously variable attenuation sheets coincide at the highest optical density (the 270° lines coincide), and the coated areas are collinear (the 0° lines coincide). Under the high-precision bevel gear meshing transmission, they can rotate in reverse synchronously. The attenuation transmittance in the overlapping area compensates each other, realizing uniform and continuous attenuation in the range of 0 - 80 dB. While ensuring high precision, it greatly reduces the operation difficulty and saves a lot of time.

[0035] It also includes a limit rod 3, a positioning sleeve 7 and a positioning bracket 11. Positioning sleeves 7 are arranged on the front and rear sides of the base 10 respectively. The positioning sleeves 7 are circular. Two positioning brackets 11 are arranged on the left and right sides of the base 10. An arc surface 111 that cooperates with the positioning sleeve 7 is arranged on the inner end surface of the positioning bracket 11. Arc grooves 112 are arranged on the front and rear sides of the positioning bracket 11. The arc surface 111, the arc grooves 112 and the positioning sleeve 7 are all coaxially arranged. Limit rods 3 are arranged on the front and rear sides of the base 10. The limit rods 3 are located in the arc grooves 112 and are slidably connected with the arc grooves 112, so that the angles of the two continuous variable attenuation sheets with the optical axis are consistent. Threads are arranged at the ends of the limit rods 3. The limit rods 3 are connected with nuts through the threads at the ends, which can be used to fix the limit rods 3. The positioning brackets 11 are connected with the driven shaft 14; the attenuation sheets form a certain angle with the light passing optical axis and are installed in a reverse complementary manner, which can provide continuous and uniform attenuation, effectively remove the reflected light caused by the attenuation sheet mirror surface from the optical path and avoid ghost images; rotate the nut, rotate the positioning bracket 11 to a specified position, and rotate the nut in the reverse direction to fix the positioning bracket 11. The two attenuation sheets form certain angles θ1 and θ2 with the light passing optical axis, and at the same time ensure the correct meshing of the high-precision bevel gears, effectively eliminate the ghost images generated by the reflected light in the optical system, and meet the optoelectronic devices and test environments with large attenuation magnification and large beam diameter energy output.

[0036] It also includes a pedestal bearing 6, a driven shaft locking nut 8, an attenuation sheet locking nut 9, an attenuation sheet mounting seat 15, a positioning seat 18, a knob 19 and a housing 20. The base 10 is arranged in the housing 20 through countersunk head screws. The housing 20 is square. A positioning bracket 11 is arranged between the base 10 and the housing 20. Positioning sleeves 7 are arranged on the front and rear sides of the base 10 through bolts. The positioning seat 18 is fixed on the front positioning sleeve 7 through screws. The driving shaft 13 sequentially passes through the front positioning sleeve 7 and the positioning seat 18 and extends out. The extending end of the driving shaft 13 is connected to the knob 19. The knob 19 is fixed on the driving shaft 13 with set screws. The driven shaft 14 is connected to the positioning bracket 11 through a pedestal bearing 6. The driven shaft 14 is arranged on the pedestal bearing 6 through a driven shaft locking nut 8. The attenuation sheet 1 is fixed on the attenuation sheet mounting seat 15 through an attenuation sheet locking nut 9. The attenuation sheet mounting seat 15 is fixed on the driven shaft 14 with set screws. The high-precision gear is fixed on the driven shaft 14 with set screws. The attenuation sheet 1 is located inside the base 10. In the prior art, the general continuously variable attenuation sheet is a single-piece circular shape, with a 270° attenuation area plated with a continuously gradually changing transmittance attenuation film, linearly increasing starting from the 0° coating position, reaching the highest optical density at 270°, and the attenuation range is 0.4 - 40 dB. When attenuating a larger beam diameter, the light passing area becomes larger, and the energy in the attenuation area is output unevenly. While this device uses two continuously variable attenuation sheets installed in a reverse complementary manner. The reasonable installation structure makes the continuously variable attenuation sheet installed at a certain angle with the light passing optical axis, the gears are correctly meshed, and rotate in reverse synchronously and stably, so that the attenuation transmittance in the overlapping area compensates each other, solving the technical defects of synchronous reverse rotation and non-uniform continuous attenuation of the two continuously variable attenuation sheets. This device is applicable to light sources of various wavelengths. The parallel light passing through the light energy attenuation device is attenuated evenly and continuously without the need for multiple sets of attenuation motion actuators and multiple attenuation sheets, with a small volume, high stability, and high reliability. It can attenuate evenly and continuously in a large range (0 - 80 dB), and can also calibrate fixed attenuation ratio gears within the attenuation ratio range.

[0037] The knob 19 is provided with scales, and the positioning seat 18 is provided with marks. The visualization of the attenuation ratio is realized by observing the positional relationship between the scales of the knob 19 and the marks; it improves the linearity and reliability, realizes continuous adjustment and precise control, can calibrate the attenuation gears, and is compatible with the step variable attenuation mode.

[0038] It includes the following steps:

[0039] Step 1: Adjustment of the attenuation sheet position:

[0040] Adjust the positioning bracket 11 so that the two attenuation sheets 1 form an angle θ;

[0041] Step 2: Adjustment of the overlapping area of the attenuation sheets:

[0042] Rotate the knob 19, and the two attenuation sheets 1 rotate in reverse synchronously;

[0043] Step 3: The laser emitter emits laser light. The housing 20 is machined with a light passing inlet hole and a light passing outlet hole that are coaxially arranged. The laser light enters the six-sided enclosed square housing 20 through the light passing inlet hole, sequentially passes through the two attenuation sheets 1, and then uniformly outputs from the light passing outlet hole.

[0044] It should be noted that in the above embodiments, as long as the technical solutions do not conflict, they can be arranged and combined. Those skilled in the art can exhaust all possibilities according to the mathematical knowledge of permutations and combinations. Therefore, the present invention will no longer explain the technical solutions after permutation and combination one by one, but it should be understood that the technical solutions after permutation and combination have been disclosed by the present invention.

[0045] This embodiment is only an exemplary illustration of this patent and does not limit its protection scope. Those skilled in the art can also make partial changes to it. As long as it does not exceed the spirit of this patent, it is within the protection scope of this patent.

Claims

1. A device for continuously attenuating the energy of a light beam, characterized in that: It includes an attenuation sheet (1), a slave gear (4), a main gear (5), a base (10), a driving shaft (13) and a driven shaft (14). The driving shaft (13) is arranged on the front side of the base (10), and the driven shafts (14) are arranged on both sides of the base (10). One end of the driving shaft (13) is connected to the main gear (5), and one end of the driven shaft (14) is connected to the slave gear (4). The main gear (5) meshes with the slave gear (4), and the attenuation sheet (1) is arranged on the driven shaft (14); the attenuation sheet (1) is a continuously variable attenuation sheet, and two continuously variable attenuation sheets are installed in a reverse complementary manner. The main gear (5) drives the slave gear (4) to realize the reverse synchronous rotation of the attenuation sheets. The described beam energy continuous attenuation device further includes a limit rod (3), a positioning sleeve (7) and a positioning bracket (11). Positioning sleeves (7) are arranged on the front and rear sides of the base (10). The positioning sleeve (7) is circular. Two positioning brackets (11) are arranged on the left and right sides of the base (10). The inner end face of the positioning bracket (11) is provided with an arc surface (111) that cooperates with the positioning sleeve (7). Arc grooves (112) are arranged on the front and rear sides of the positioning bracket (11). Limit rods (3) are arranged on the front and rear sides of the base (10). The limit rods (3) are located in the arc grooves (112) and are slidably connected to the arc grooves (112). The positioning bracket (11) is connected to the driven shaft (14).

2. The device for continuously attenuating the energy of a light beam according to claim 1, characterized in that: It further includes a pedestal bearing (6), a driven shaft locking nut (8), an attenuation sheet locking nut (9), an attenuation sheet mounting seat (15), a positioning seat (18), a knob (19) and a housing (20). The base (10) is arranged in the housing (20) through countersunk head screws. A positioning bracket (11) is arranged between the base (10) and the housing (20). Positioning sleeves (7) are arranged on the front and rear sides of the base (10) through bolts. The positioning seat (18) is fixed on the front positioning sleeve (7) through screws. The driving shaft (13) sequentially passes through the front positioning sleeve (7) and the positioning seat (18) and extends out. The extending end of the driving shaft (13) is connected to the knob (19). The driven shaft (14) is connected to the positioning bracket (11) through a pedestal bearing (6). The attenuation sheet (1) is fixed on the attenuation sheet mounting seat (15) through an attenuation sheet locking nut (9). The attenuation sheet mounting seat (15) is fixed on the driven shaft (14).

3. The device for continuously attenuating the energy of a light beam according to claim 2, characterized in that: The knob (19) is provided with scales, and the positioning seat (18) is provided with marks.

4. A method for continuously attenuating the energy of a light beam, characterized in that: Adopting the beam energy continuous attenuation device described in any one of claims 1-3, it includes the following steps: Step 1: Attenuation sheet position adjustment: Adjust the positioning bracket (11) so that the two attenuation sheets (1) form an included angle θ; Step 2: Attenuation sheet overlapping area adjustment: Rotate the knob (19), and the two attenuation sheets (1) rotate in reverse synchronously.

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