CN107561689B - KDP crystal surface shape control device based on voice coil motor drive - Google Patents

Abstract

A KDP crystal surface shape control device driven by a voice coil motor relates to a KDP crystal surface shape control device driven by a voice coil motor. The present invention solves the problem that the existing device cannot intuitively study the influence of the crystal surface quality on the laser frequency conversion efficiency and beam quality. The device of the present invention is composed of a crystal frame module, a crystal drive module, a motor positioning module and an outer frame module; the crystal frame module is composed of a pressure plate, a pressure-bearing plate, a bottom-side fixing piece, a top-side fixing piece, a left restraining plate, a right Constraining plate, loading block, arc shrapnel, elastic backing plate; the crystal drive module is composed of 16 drivers, and a single driver is composed of a flat head piece, a flexible hinge and a voice coil motor; the motor positioning module is composed of a motor positioning top cover, It consists of a motor positioning front plate, a motor positioning rear plate and a motor positioning base. The invention is used to study the frequency conversion efficiency and beam quality when the laser passes through the KDP crystal.

Description

A KDP crystal surface shape control device based on voice coil motor drive

technical field

The invention relates to a KDP crystal surface shape control device driven by a voice coil motor.

Background technique

As a frequency-doubling crystal, KDP crystals are widely used in major technologies such as controlled thermonuclear reactions in high-power laser systems and nuclear explosion simulations. In order to obtain higher peak power and better beam quality, the aspect ratio of the KDP crystal in the ICF device is gradually increasing, while the elastic modulus is small, which makes the surface shape accuracy of the KDP crystal very easy to be affected by its own gravity during use. , ambient temperature, the flatness of the frame support surface, the clamping force of the crystal components and other external factors, which directly affect the frequency conversion efficiency and beam quality of the laser.

Therefore, extremely high requirements are placed on the surface shape control of KDP crystals. It is urgent to simulate its deformation in various complex environments through a crystal surface shape control device, so as to master its laser frequency conversion efficiency and beam quality, so as to provide Practical applications provide theoretical support.

SUMMARY OF THE INVENTION

The invention provides a KDP crystal surface control device driven by a voice coil motor to solve the problem that the existing device cannot intuitively study the influence of the crystal surface quality on the laser frequency conversion efficiency and beam quality.

A KDP crystal surface shape control device driven by a voice coil motor of the present invention is composed of a crystal frame module, a crystal drive module, a motor positioning module and an outer frame module; the crystal frame module is composed of a pressure plate, a pressure-bearing plate, a bottom The side fixing piece, the top side fixing piece, the restraining plate, the loading block, the arc-shaped elastic sheet and the elastic pad are composed; the outer frame of the pressure plate and the pressure-bearing plate are provided with grooves matching the elastic pad, An elastic backing plate is respectively arranged in the groove on the outer frame of the pressure plate and the pressure plate; the KDP crystal is vertically arranged between the pressure plate and the pressure plate; A plurality of notches are evenly arranged on the outer frame, and the notches on the outer frame of the pressure plate correspond to the notches on the outer frame of the pressure-bearing plate; the top of the KDP crystal is provided with an arc-shaped shrapnel, and the KDP The upper part of the crystal, the pressure plate and the pressure-bearing plate is provided with a top-side fixing piece, and the bottom end of the top-side fixing piece is provided with a lateral protrusion to press the arc-shaped elastic piece; the KDP crystal, the pressure-bearing plate and the pressure-bearing plate The lower part of the pressure-bearing plate is provided with a bottom-side fixing member; the notches on the outer frames on both sides of the pressure-bearing plate are provided with loading blocks, and the outer sides of the outer frames on both sides of the pressure-bearing plate are respectively provided with restraining plates, A number of pin holes and a number of screw holes are provided, the pin holes are provided with positioning pins to fix the restraining plate, and the screw holes are provided with loading screws to control the concave recesses of the loading blocks on the outer frames on both sides of the pressure-bearing plate. Intraoral sliding; the crystal drive module is composed of 16 drivers, and a single driver is composed of a flat head piece, a flexible hinge and a voice coil motor; the flat head piece and the voice coil motor are connected by a flexible hinge, and the central axis of the voice coil motor is connected with the flexible hinge Connected by screws; the motor positioning module is composed of a motor positioning top cover, a motor positioning front plate, a motor positioning rear plate and a motor positioning base; the motor positioning front plate and the motor positioning rear plate are distributed in a 5×5 array. 25 clear apertures, the 25 clear apertures on the front plate of the motor positioning are symmetrical and coaxial with the 25 clear apertures on the rear plate of the motor positioning; 4 arrays are provided with 16 driver front assembly positions, and the driver front assembly positions are set at the center point of the square surrounded by every four adjacent light apertures; the motor positioning rear plate is provided with 4×4 arrays. 16 driver rear assembly positions, the driver front assembly positions are set at the center point of the square surrounded by every four adjacent light apertures; the flat head piece of the single driver passes through the driver front assembly on the motor positioning front plate and fixed by bolts; the bottom end of the voice coil motor of the single driver is fixed at the rear assembly of the driver by bolts; the upper end surfaces of the motor positioning front plate and the motor positioning rear plate are provided with a motor positioning top cover, and the motor positioning The lower end surfaces of the positioning front plate and the motor positioning rear plate are provided with a motor positioning base; the outer frame module is composed of an outer frame top cover, an outer frame left plate, an outer frame right plate and an outer frame base; the motor positioning base is fixed on the outer frame. On the frame base, the outer frame top cover is fixed above the motor positioning top cover, the outer frame left plate is fixed on the left side of the motor positioning module, and the outer frame right plate is fixed on the right side of the motor positioning module; The crystal frame module set the motor The outside of the positioning front plate is in contact with the flat head piece of the single drive.

Beneficial effects:

The invention can accurately simulate the surface shape change of the KDP crystal under various complex environments, and control the deformation of the KDP crystal through the crystal drive module to study the frequency conversion efficiency and beam quality of the laser passing through the crystal. The invention adopts the voice coil motor to realize the surface shape control of the KDP crystal, and has the advantages of simple structure, short delay time, fast response, large stroke, high control precision and high energy conversion efficiency, and meets the requirements of the KDP crystal driving device.

Description of drawings

Fig. 1 is a structural schematic diagram of a KDP crystal surface shape control device driven by a voice coil motor;

2 is a schematic diagram of the exploded structure of a KDP crystal surface shape control device driven by a voice coil motor;

3 is a schematic diagram of an exploded structure of a crystal frame module;

4 is a schematic structural diagram of a motor positioning module;

Figure 5 is an enlarged schematic view of the side of the pressure-bearing plate;

6 is a schematic structural diagram of a single driver;

Figure 7 is a front view of the motor positioning rear plate;

Figure 8 is a rear view of the motor positioning rear plate.

Detailed ways

Embodiment 1: This embodiment will be described with reference to FIG. 1 to FIG. 6. A KDP crystal surface shape control device based on voice coil motor drive in this embodiment consists of a crystal frame module 1, a crystal drive module 2, a motor positioning module 3 and an external device. The crystal frame module 1 is composed of a pressure plate 1-1, a pressure bearing plate 1-2, a bottom side fixing piece 1-3, a top side fixing piece 1-4, a restraining plate 1-5, a loading block 1-7. Arc shrapnel 1-8 and elastic pads 1-9 are formed; the outer frames of the pressure plate 1-1 and the pressure-bearing plate 1-2 are provided with matching elastic pads 1-9 The grooves on the outer frame of the pressure plate 1-1 and the pressure bearing plate 1-2 are respectively provided with an elastic backing plate 1-9; the KDP crystal 6 is vertically arranged on the pressure plate 1-1 and the pressure-bearing plate 1-2; the outer frames of the pressure-bearing plate 1-1 and the pressure-bearing plate 1-2 are evenly provided with a plurality of notches, and the depressions on the outer frame of the pressure-bearing plate 1-1 The opening corresponds to the notch on the outer frame of the pressure-bearing plate 1-2; the top of the KDP crystal 6 is provided with an arc-shaped elastic piece 1-8, the KDP crystal 6, the pressure plate 1-1 and the pressure-bearing plate 1 The upper part of -2 is provided with a top side fixing member 1-4, and the bottom end of the top side fixing member 1-4 is provided with a lateral protrusion for pressing the arc-shaped elastic pieces 1-8; the KDP crystal 6, the pressure plate 1 -1 and the lower part of the pressure-bearing plate 1-2 are provided with bottom-side fixing pieces 1-3; the notches on the outer frames on both sides of the pressure-bearing plate 1-2 are provided with loading blocks 1-7. Constraining plates 1-5 are respectively provided on the outer sides of the outer frames on both sides of the plate 1-2, the constraining plates 1-5 are provided with a number of pin holes and a number of screw holes, and the pin holes are provided with positioning pins 1-6 for use In order to fix the restraint plate 1-5, the screw holes are provided with loading screws 1-10 to control the loading blocks 1-7 to slide in the notches on the outer frames on both sides of the pressure plate 1-2; the crystal drive module 2 is composed of 16 drivers, and a single driver is composed of a flat head piece 2-1, a flexible hinge 2-2 and a voice coil motor 2-3; the flat head piece 2-1 and the voice coil motor 2-3 are connected by the flexible hinge 2-2, The central axis of the voice coil motor 2-3 is connected with the flexible hinge 2-2 through threads; the motor positioning module 3 is composed of a motor positioning top cover 3-1, a motor positioning front plate 3-2, and a motor positioning rear plate 3- 3 and the motor positioning base 3-4; the motor positioning front plate 3-2 and the motor positioning rear plate 3-3 are distributed with 25 clear apertures in a 5×5 array, and the motor positioning front plate 3- The 25 clear apertures on 2 are symmetrical and coaxial with the 25 clear apertures on the motor positioning rear plate 3-3; the motor positioning front plate 3-2 is arranged in a 4×4 array with 16 apertures. There are 16 front assembly places of the driver, and the front assembly place of the driver is set at the center point of the square surrounded by every four adjacent clear apertures; the motor positioning rear plate 3-3 is arranged in a 4×4 array with 16 The rear assembly place of the driver, the front assembly place of the driver is set at the center point of the square surrounded by every four adjacent clear apertures; the flat head piece 2-1 of the single driver passes through the motor positioning front plate 3-2 before the drive The assembly place is fixed by bolts; the bottom end of the voice coil motor 2-3 of the single driver is fixed at the rear assembly place of the driver by bolts; the upper end face of the motor positioning front plate 3-2 and the motor positioning rear plate 3-3 A motor positioning top cover 3-1 is provided, and the lower end surfaces of the motor positioning front plate 3-2 and the motor positioning rear plate 3-3 are provided with a motor positioning base 3-4; the outer frame module 4 is formed by the outer frame top cover. 4-1. The outer frame left plate 4-2, the outer frame right plate 4-3 and the outer frame base 4-4 are composed; the motor positioning base 3-4 is fixed on the outer frame base 4-4, and the outer frame top The cover 4-1 is fixed above the motor positioning top cover 3-1, the outer frame left plate 4-2 is fixed on the left side of the motor positioning module 3, and the outer frame right plate 4-3 is fixed on the motor positioning module 3 The right side of the crystal frame module 1 is provided with the outer side of the motor positioning front plate 3-2 in contact with the flat head piece 2-1 of the single driver.

The maximum driving force of the KDP crystal surface shape control device driven by the voice coil motor of this embodiment is 20N.

In this embodiment, the crystal frame module is used to clamp and support the KDP crystal with low stress; the crystal drive module is used to drive the deformation of the crystal to make it conform to the crystal surface shape value required by the experiment; the motor positioning module is used to realize the high-quality voice coil motor Accurate positioning, so that the positioning error is within the controllable range; the outer frame module is used to connect the crystal frame module and the motor positioning module, and the positioning point on the outer frame module is used to ensure the position accuracy.

The use of 16 drivers in this embodiment can ensure that the crystal is deformed like an envelope at each position, and it is impossible to reach or exceed the deformation of the crystal under gravity, which not only meets the required surface shape accuracy requirements, but also takes into account the cost. .

In this embodiment, an elastic backing plate is respectively provided in the groove on the outer frame of the pressure plate and the pressure-bearing plate to constrain the five degrees of freedom and ensure that the elastic backing plate and the crystal are in flexible contact.

In this embodiment, the loading block is placed in the notch on the outer frame on both sides of the bearing plate, and the loading block is driven to slide in the notch by the loading screw, and the positioning of the loading block is realized by two positioning pins, thereby restricting the movement of the KDP crystal in the left and right directions .

In this embodiment, the KDP crystal is placed vertically, and the bottom fixing member is a load-bearing plate, which bears the weight of the entire KDP crystal, and the contact surface with the crystal is precisely processed to ensure that the crystal is uniformly stressed.

In this embodiment, the top of the KDP crystal adopts an arc-shaped shrapnel as an elastic constraint, and a top-side fixing member is used to press the shrapnel to ensure low-stress fixation of the crystal.

In this embodiment, the motor positioning module ensures the positional accuracy by positioning the top cover and the base of the motor; the motor positioning rear plate is used as the main force bearing plate to bear the gravity of the voice coil motor and the reaction force of the driving force; the motor positioning front plate is used as an auxiliary Support can remove part of the reaction force.

Embodiment 2: The difference between this embodiment and Embodiment 1 is that the flexible hinge 2-2 is a straight circular multi-axis flexible hinge. Others are the same as the first embodiment.

Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the diameter of the light-transmitting aperture is 20 mm. Others are the same as in the first or second embodiment.

Embodiment 4: The difference between this embodiment and one of Embodiments 1 to 3 is that the cross-sectional diameter of the flat head piece 2-1 is 6 mm. This setting can ensure a reasonable contact area between the flat head part and the KDP crystal, so as to avoid the fact that the contact surface is too small to exceed the pressure bearing capacity of the crystal or the contact surface is too large to make the actual surface shape and the reference surface shape. The misalignment error between them exceeds the allowable value. The full contact between the flat head and the KDP crystal is ensured by a flexible hinge with two degrees of freedom of X-axis rotation and Y-axis rotation. The pressure sensor integrated inside the voice coil motor senses whether the flat head is in contact with the KDP crystal. When the two are in contact, it is regarded as the control "zero point". At the same time, it monitors that the pressure of the KDP crystal does not exceed the specified range to prevent damage to the crystal. Others are the same as one of Embodiments 1 to 3.

Embodiment 5: As shown in FIG. 7 and FIG. 8 , the difference between this embodiment and one of Embodiments 1 to 4 is that the front panel of the motor positioning rear plate 3-3 is provided with a voice coil motor for positioning 2-3 The cylindrical pit at the bottom end, the rear panel of the motor positioning rear plate 3-3 is cut out of material to make a triangular reinforcing rib plate. Others are the same as one of Embodiments 1 to 4.

In this embodiment, the weight is minimized on the premise of ensuring the deformation accuracy. The motor positioning front plate is the same as the front side of the motor positioning rear plate, and there is no rib structure, which only plays the role of auxiliary positioning and supporting the voice coil motor.

Embodiment 6: The difference between this embodiment and one of Embodiments 1 to 5 is that the motor positioning top cover 3-1 and the motor positioning base 3-4 are processed with a front plate 3-4 for fixing the motor positioning. 2 and the motor positioning the elongated bosses of the rear plate 3-3. Others are the same as one of Embodiments 1 to 5.

In this embodiment, the position of the motor positioning front plate and the motor positioning rear plate can be precisely positioned by arranging the bosses, and the processing area of the parts and the contact area between the parts can be reduced, so that the joint surfaces are in good contact.

The beneficial effects of the present invention are verified by the following examples:

Embodiment 1: A KDP crystal surface shape control device driven by a voice coil motor is composed of a crystal frame module 1, a crystal drive module 2, a motor positioning module 3 and an outer frame module 4; the crystal frame module 1 is composed of a pressure plate 1-1, bearing plate 1-2, bottom side fixing piece 1-3, top side fixing piece 1-4, restraining plate 1-5, loading block 1-7, arc shrapnel 1-8 and elastic pad 1 -9 composition; the outer frames of the pressure plate 1-1 and the pressure-bearing plate 1-2 are provided with grooves that match the elastic pads 1-9, and the pressure plate 1-1 and the pressure-bearing plate An elastic backing plate 1-9 is respectively arranged in the groove on the outer frame of the plate 1-2; the KDP crystal 6 is vertically arranged between the pressure plate 1-1 and the pressure bearing plate 1-2; the pressure plate 1-1 and the outer frame of the pressure-bearing plate 1-2 are evenly provided with a plurality of notches, and the notches on the outer frame of the pressure-bearing plate 1-1 are the same as the notches on the outer frame of the pressure-bearing plate 1-2. Correspondingly; the top of the KDP crystal 6 is provided with an arc-shaped elastic piece 1-8, and the upper part of the KDP crystal 6, the pressure plate 1-1 and the pressure plate 1-2 is provided with a top side fixing member 1-4, so The bottom end of the top-side fixing member 1-4 is provided with a lateral protrusion to press the arc-shaped elastic piece 1-8; the lower part of the KDP crystal 6, the pressure plate 1-1 and the pressure-bearing plate 1-2 is provided with a bottom side Fixing parts 1-3; loading blocks 1-7 are provided in the notches on the outer frames on both sides of the pressure-bearing plate 1-2, and restraining plates are respectively provided on the outer sides of the outer frames on both sides of the pressure-bearing plate 1-2 1-5, the restraining plate 1-5 is provided with a number of pin holes and a number of screw holes, the pin holes are provided with positioning pins 1-6 to fix the restraint plate 1-5, and the screw holes are provided with The loading screws 1-10 are used to control the loading blocks 1-7 to slide in the notches on the outer frames on both sides of the pressure plate 1-2; the crystal drive module 2 consists of 16 drivers, and a single driver consists of a flat head piece 2-1 , a flexible hinge 2-2 and a voice coil motor 2-3; the flat head piece 2-1 and the voice coil motor 2-3 are connected by a flexible hinge 2-2, and the central axis of the voice coil motor 2-3 is connected with the flexible hinge 2 -2 is connected by screws; the motor positioning module 3 is composed of a motor positioning top cover 3-1, a motor positioning front plate 3-2, a motor positioning rear plate 3-3 and a motor positioning base 3-4; The board 3-2 and the motor positioning rear board 3-3 are distributed with 25 clear apertures in a 5×5 array, and the 25 light clear apertures on the motor positioning front board 3-2 and the motor positioning rear board The 25 clear apertures on 3-3 are relatively symmetrical and coaxially arranged; the motor positioning front plate 3-2 is provided with 16 driver front assembly positions in a 4×4 array, and the driver front assembly positions are arranged in each At the center point of the square surrounded by four adjacent clear apertures; the motor positioning rear plate 3-3 is provided with 16 driver rear assembly positions in a 4×4 array, and the driver front assembly positions are set at every four At the center point of the square surrounded by two adjacent clear apertures; the flat head piece 2-1 of the single driver passes through the front assembly of the driver on the motor positioning front plate 3-2 and is fixed by bolts; voice coil motor The bottom end of 2-3 is fixed at the rear assembly place of the driver by bolts; the upper end faces of the motor positioning front plate 3-2 and the motor positioning rear plate 3-3 are provided with a motor positioning top cover 3-1. The lower end surfaces of the plate 3-2 and the motor positioning rear plate 3-3 are provided with a motor positioning base 3-4; the outer frame module 4 consists of an outer frame top cover 4-1, an outer frame left plate 4-2, an outer frame right The board 4-3 and the outer frame base 4-4 are composed; the motor positioning base 3-4 is fixed on the outer frame base 4-4, and the outer frame top cover 4-1 is fixed above the motor positioning top cover 3-1 , the outer frame left plate 4-2 is fixed on the left side of the motor positioning module 3, the outer frame right plate 4-3 is fixed on the right side of the motor positioning module 3; the crystal frame module 1 is provided with a motor positioning front plate The outside of 3-2 is in contact with the flat head piece 2-1 of the single driver.

The cross-sectional diameter of the flat head piece 2-1 is 6 mm.

The front panel of the motor positioning rear plate 3-3 is provided with a cylindrical recess for positioning the bottom end of the voice coil motor 2-3, and the rear panel of the motor positioning rear plate 3-3 is cut out of material to make a triangular reinforcing rib plate. The motor positioning top cover 3-1 and the motor positioning base 3-4 are both machined with elongated bosses for fixing the motor positioning front plate 3-2 and the motor positioning rear plate 3-3.

This embodiment can accurately simulate the surface shape change of the KDP crystal in various complex environments, and control the deformation of the KDP crystal through the crystal drive module to study the frequency conversion efficiency and beam quality of the laser passing through the crystal. The invention adopts the voice coil motor to realize the surface shape control of the KDP crystal, and has the advantages of simple structure, short delay time, fast response, large stroke, high control precision and high energy conversion efficiency, and meets the requirements of the KDP crystal driving device.

Claims (6)

1. A KDP crystal surface shape control device driven by a voice coil motor is characterized in that the KDP crystal surface shape control device driven by a voice coil motor is composed of a crystal frame module (1), a crystal drive module (2), a motor positioning module (3) is composed of an outer frame module (4); the crystal frame module (1) is composed of a pressure plate (1-1), a pressure bearing plate (1-2), a bottom fixing member (1-3), a top A side fixing member (1-4), a restraining plate (1-5), a loading block (1-7), an arc-shaped elastic piece (1-8) and an elastic backing plate (1-9) are composed; the pressure plate ( 1-1) and the outer frame of the pressure-bearing plate (1-2) are provided with grooves that match the elastic backing plate (1-9), and the pressure plate (1-1) and the pressure-bearing plate ( 1-2) An elastic backing plate (1-9) is respectively arranged in the groove on the outer frame; the KDP crystal (6) is vertically arranged on the pressure plate (1-1) and the pressure bearing plate (1-2) between; the outer frames of the pressure plate (1-1) and the pressure-bearing plate (1-2) are evenly provided with a plurality of notches, and the notches on the outer frame of the pressure plate (1-1) Corresponding to the notch on the outer frame of the pressure-bearing plate (1-2); the top of the KDP crystal (6) is provided with an arc-shaped elastic piece (1-8), the KDP crystal (6), the pressure plate ( 1-1) and the upper part of the pressure-bearing plate (1-2) are provided with a top side fixing member (1-4), and the bottom end of the top side fixing member (1-4) is provided with a transverse protrusion for pressing the arc A shrapnel (1-8); a bottom side fixing member (1-3) is provided on the lower part of the KDP crystal (6), the pressure plate (1-1) and the pressure bearing plate (1-2); the pressure bearing plate (1-3) Loading blocks (1-7) are provided in the notches on the outer frames on both sides of the plate (1-2), and restraining plates (1-5) are respectively provided on the outer sides of the outer frames on both sides of the pressure-bearing plate (1-2). ), the restraining plate (1-5) is provided with a number of pin holes and a number of screw holes, and a positioning pin (1-6) is arranged in the pin hole to fix the restraint plate (1-5), the screw A loading screw (1-10) is arranged in the hole to control the loading block (1-7) to slide in the notches on the outer frames on both sides of the pressure bearing plate (1-2); the crystal drive module (2) consists of 16 A single driver consists of a flat head piece (2-1), a flexible hinge (2-2) and a voice coil motor (2-3); the 16 drivers are arranged in a 4×4 array on the front plate of the motor positioning (3-2) and the motor positioning rear plate (3-3); the flat head piece (2-1) and the voice coil motor (2-3) are connected through a flexible hinge (2-2), and the voice coil motor The central axis of (2-3) is connected with the flexible hinge (2-2) by screws; the motor positioning module (3) consists of a motor positioning top cover (3-1), a motor positioning front plate (3-2), a motor positioning The positioning rear plate (3-3) and the motor positioning base (3-4) are composed; the motor positioning front plate (3-2) and the motor positioning rear plate (3-3) are distributed with 25 25 clear apertures on the motor positioning front plate (3-2) and the motor positioning rear plate (3-3) The 25 clear apertures are relatively symmetrical and coaxially arranged; the motor positioning front plate (3-2) is provided with 16 driver front assembly locations in a 4×4 array, and the driver front assembly locations are arranged at every four At the center point of the square surrounded by adjacent clear apertures; the motor positioning rear plate (3-3) is provided with 16 driver rear assembly positions in a 4×4 array, and the driver front assembly positions are set at every four At the center point of the square surrounded by two adjacent clear apertures; the flat head piece (2-1) of the single driver passes through the front assembly of the driver on the motor positioning front plate (3-2) and is fixed by bolts; The bottom end of the voice coil motor (2-3) of the single driver is fixed at the rear assembly position of the driver by bolts; the upper end faces of the motor positioning front plate (3-2) and the motor positioning rear plate (3-3) are provided with a motor positioning top cover (3-1), a motor positioning base (3-4) is provided on the lower end surfaces of the motor positioning front plate (3-2) and the motor positioning rear plate (3-3); the outer frame module (4) It consists of an outer frame top cover (4-1), an outer frame left plate (4-2), an outer frame right plate (4-3) and an outer frame base (4-4); the motor positioning base ( 3-4) is fixed on the outer frame base (4-4), the outer frame top cover (4-1) is fixed above the motor positioning top cover (3-1), the outer frame left plate (4-2) ) is fixed on the left side of the motor positioning module (3), the outer frame right plate (4-3) is fixed on the right side of the motor positioning module (3); the crystal frame module (1) is provided with a motor positioning front plate ( The outside of 3-2) is in contact with the flat head (2-1) of the single driver. 2 . The KDP crystal surface shape control device driven by a voice coil motor according to claim 1 , wherein the flexible hinge ( 2 - 2 ) is a straight circular multi-axis flexible hinge. 3 . 3 . The KDP crystal surface shape control device driven by a voice coil motor according to claim 1 , wherein the diameter of the light-transmitting aperture is 20 mm. 4 . 4. The KDP crystal surface shape control device driven by a voice coil motor according to claim 1, characterized in that the cross-sectional diameter of the flat head piece (2-1) is 6 mm. 5. A kind of KDP crystal surface shape control device based on voice coil motor drive according to claim 1, it is characterized in that the front panel of described motor positioning rear plate (3-3) is provided with for positioning voice coil motor (2 -3) The cylindrical pit at the bottom end, the rear panel of the motor positioning rear panel (3-3) is cut out of material to make a triangular reinforcing rib plate. 6. A KDP crystal surface shape control device based on voice coil motor drive according to claim 1, characterized in that both the motor positioning top cover (3-1) and the motor positioning base (3-4) are processed There are long bosses for fixing the motor positioning front plate (3-2) and the motor positioning rear plate (3-3).

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