阅读说明：本技术 一种红外瞄准镜非均匀性校正快门装置 (Infrared sighting telescope nonuniformity correction shutter device ) 是由 刘旭东 吴玉堂 王国力 梁思远 刘建芬 刘亚梅 于 2019-10-10 设计创作，主要内容包括：本发明公开了一种红外瞄准镜非均匀性校正快门装置,包括从像侧到靶面依次排列的压盖、背景校正片和压铸底座；背景校正片由电磁阀驱动。本发明采用电磁阀驱动方式,性能稳定,功耗小,寿命长,适用于户外打猎、手持热像、边防警戒等环境变化范围较大的场合,相比于步进电机驱动,能有效避免电机失步的问题,增加了整体装置的寿命；能实时根据外部环境进行非均匀性校正,比无挡片校正调取内部存储值更准确；成像幅面大,可用于640机芯,满足大部分探测器的靶面需求；进一步,背景校正片不同于常见的冲压、喷玻璃丸或喷漆工艺,采用真空镀的发黑工艺,背景更纯,同时能完整覆盖探测靶面,能有效减少杂散光的影响；底座为压铸铝,具有强的抗振动、抗冲击性能。(The invention discloses a shutter device for correcting heterogeneity of an infrared sighting telescope, which comprises a gland, a background correction sheet and a die-casting base, wherein the gland, the background correction sheet and the die-casting base are sequentially arranged from an image side to a target surface; the background correction sheet is driven by an electromagnetic valve. The invention adopts the electromagnetic valve driving mode, has stable performance, small power consumption and long service life, is suitable for occasions with larger environment change range such as outdoor hunting, handheld thermal imagery, side defence warning and the like, can effectively avoid the problem of motor step loss compared with the driving of a stepping motor, and prolongs the service life of the whole device; the non-uniformity correction can be carried out in real time according to the external environment, and the method is more accurate than the method for adjusting and obtaining the internal storage value without the blocking piece; the imaging breadth is large, and the imaging device can be used for 640 movement and meets the target surface requirements of most detectors; furthermore, the background correction sheet is different from common stamping, glass pill spraying or paint spraying processes, a blackening process of vacuum plating is adopted, the background is purer, meanwhile, the detection target surface can be completely covered, and the influence of stray light can be effectively reduced; the base is die-cast aluminum and has strong vibration resistance and shock resistance.)

1. The utility model provides an infrared gun sight heterogeneity correction shutter device which characterized in that: the device comprises a gland, a background correction sheet and a die-casting base which are sequentially arranged from an image side to a target surface; the background correction sheet is driven by an electromagnetic valve.

2. The infrared telescope nonuniformity correction shutter device as defined in claim 1, wherein: the electromagnetic valve is arranged in the die-casting base; and a polarizing plate is additionally arranged at the tail part of the electromagnetic valve.

3. The infrared telescope nonuniformity correction shutter device as defined in claim 1 or 2, wherein: the die-casting base is provided with a storage tank, the storage tank comprises a first rectangular storage tank and a second storage tank arranged on one side of the first storage tank in the length direction, and the first storage tank and the second storage tank form a convex structure; the electromagnetic valve is arranged in the second storage tank, the background correction sheet is connected in the first storage tank in a sliding manner and can slide along the length direction of the first storage tank, the electromagnetic valve is connected with the background correction sheet through a connecting rod, and the electromagnetic valve drives the connecting rod to drive the background correction sheet to slide along the length direction of the first storage tank; the gland is pressed on the die-casting base and covers the storage tank completely; a first window is arranged on the gland, a second window is arranged on the die-casting base and at the bottom of the first storage tank, a third window is arranged on the background correction sheet, and the first window and the second window are arranged concentrically; under the drive of the electromagnetic valve, when the background correction sheet moves to the maximum displacement of one end of the first storage tank in the length direction, the first window, the second window and the third window are concentrically arranged, and when the background correction sheet moves to the maximum displacement of the other end of the first storage tank in the length direction, the part, which is not windowed, of the background correction sheet completely shields the first window and the second window.

4. The infrared telescope nonuniformity correction shutter device as defined in claim 3, wherein: the solenoid valve comprises a solenoid base, a solenoid, a permanent magnet base, a permanent magnet, a PCB and a terminal wire; the solenoid base is arranged in the second storage tank; the solenoid is positioned in the solenoid base; the permanent magnet base is positioned in the solenoid, the permanent magnet is positioned in the permanent magnet base, one end of the connecting rod is connected with the permanent magnet base, and the other end of the connecting rod is connected with the background correction sheet; the solenoid electrode lead wire is connected with the PCB and is led out of the permanent magnet base through a terminal wire.

5. The infrared telescope nonuniformity correction shutter device as defined in claim 4, wherein: the terminal line is a PH1.25 terminal line.

6. The infrared telescope nonuniformity correction shutter device as defined in claim 3, wherein: the background correction sheet is provided with a strip-shaped sliding groove which is vertical to the movement direction of the background correction sheet, a cam pin is arranged at the joint of the connecting rod and the background correction sheet, and the cam pin is connected in the strip-shaped sliding groove in a sliding manner and can slide along the length direction of the strip-shaped sliding groove.

7. The infrared telescope nonuniformity correction shutter device as defined in claim 3, wherein: buffering cushions are arranged on two sides of the first storage tank in the length direction; the roughness of the sliding surface of the first reservoir is less than 0.8 μm.

8. The infrared telescope nonuniformity correction shutter device as defined in claim 7, wherein: the cushion pad is made of silicon rubber with the hardness of 50 degrees through die casting.

9. The infrared telescope nonuniformity correction shutter device as defined in claim 1 or 2, wherein: the background correction sheet adopts a stainless steel sheet with the thickness of 0.08mm, etching processing is adopted, and surface blackening is carried out by adopting a vacuum blackening method; the die-casting base is made of ADC12 die-casting aluminum; the gland is injection molded by ABS plastic.

10. The infrared telescope nonuniformity correction shutter device as defined in claim 1 or 2, wherein: the long-wave response movement with the wave band of 8-14um is applicable.

Technical Field

The invention relates to a shutter device for correcting the nonuniformity of an infrared sighting telescope, belonging to the field of nonuniformity correction of the infrared sighting telescope.

Background

In the infrared imaging process, along with the temperature rise of the detector and the change of luminous flux, the focal plane array pixels of the infrared detector respond to inconsistency, so that the presented image is unclear, the background noise of the image is obvious, and a corresponding non-uniformity correction technology is required to be adopted to ensure that the detector can be calibrated at regular time.

In the current sighting telescope market, detectors are corrected without blocking pieces, the real-time temperature of the detectors is detected at regular time through an algorithm in a machine core, and then a calibration sample plate stored in the machine core is called to perform equivalent correction, but under a complex use environment, the non-uniformity correction cannot simulate a correct external environment. Meanwhile, the infrared correction module is applied to an optical system with strong vibration and strong impact, low noise and low power consumption performance are required, and the infrared correction module can serve as a black background on the infrared aiming optical system to perform non-uniformity correction on the infrared detector. In the case where the environment in which the scope is used is relatively severe, the conventional correction device is poor in impact resistance in terms of integration, is likely to generate a large noise, and exposes its own position, and therefore, it is necessary to develop a correction device having a strong impact and a low noise.

Disclosure of Invention

The invention provides a shutter device for correcting the nonuniformity of an infrared sighting telescope, which is a shutter device suitable for correcting the nonuniformity of an infrared sighting telescope movement and provides a sighting telescope background correction solution with low power consumption, high stability and strong impact resistance.

In order to solve the technical problems, the technical scheme adopted by the invention is as follows:

a shutter device for correcting the nonuniformity of an infrared sighting telescope comprises a gland, a background correcting sheet and a die-casting base which are sequentially arranged from an image side to a target surface; the background correction sheet is driven by an electromagnetic valve.

The background correction sheet serves as a black background plate, providing a frame sample for non-uniformity correction; the electromagnetic valve provides drive for the background correction sheet; the die-casting base is an impact-resistant supporting component.

The invention is suitable for the background correction of a sighting telescope optical system with strong vibration and strong impact, provides a correction device of an optical detector used on a sighting telescope, and is suitable for occasions with larger environment change ranges such as outdoor hunting, handheld thermal imagery, side defense warning and the like. Compared with the driving of a stepping motor, the problem of motor step loss can be effectively avoided, the service life of the whole device is prolonged, the shock resistance is improved, and the noise is reduced; particularly, in the aiming system, the problem of inaccurate temperature control caused by the interference of the external environment when no baffle plate is used for correction is solved.

The electromagnetic valve is arranged in the die-casting base, and a polarizing plate is additionally arranged at the tail part of the electromagnetic valve for ensuring the low-power-consumption operation of a product. After the product is subjected to non-uniformity correction and the background correction sheet returns to the initial position, the power supply can be cut off, and the correction device is ensured not to generate power consumption.

In order to reduce the volume and ensure the correction effect at the same time, a die-casting base is provided with a storage tank, the storage tank comprises a rectangular first storage tank and a second storage tank arranged in the center of one side of the first storage tank in the length direction, and the first storage tank and the second storage tank form a convex structure; the electromagnetic valve is arranged in the second storage tank, the background correction sheet is connected in the first storage tank in a sliding mode and can slide along the length direction of the first storage tank, the electromagnetic valve is connected with the background correction sheet through a connecting rod, and the electromagnetic valve drives the connecting rod to drive the background correction sheet to slide along the length direction of the first storage tank; the gland is pressed on the die-casting base and covers the storage tank completely; a first window is arranged on the gland, a second window is arranged on the pressure casting base and the bottom of the first storage tank, a third window is arranged on the background correction sheet, and the first window and the second window are arranged concentrically; under the drive of the electromagnetic valve, when the background correction sheet moves to the maximum displacement of one end of the first storage tank in the length direction, the first window, the second window and the third window are concentrically arranged, and when the background correction sheet moves to the maximum displacement of the other end of the first storage tank in the length direction, the part, which is not windowed, of the background correction sheet completely shields the first window and the second window.

In order to reduce the volume and ensure the correction effect at the same time, as a preferred implementation scheme, the electromagnetic valve comprises a solenoid base, a solenoid, a permanent magnet base, a permanent magnet, a PCB and a terminal wire; the solenoid base is arranged in the second storage tank; the solenoid is positioned in the solenoid base; the permanent magnet base is positioned in the solenoid, the permanent magnet is positioned in the permanent magnet base, one end of the connecting rod is connected with the permanent magnet base, and the other end of the connecting rod is connected with the background correction sheet; the solenoid electrode lead wire is connected with the PCB and is led out of the integral structural member of the correcting device through the terminal wire.

In order to solve the problems of step loss, service life and the like which may occur in a stepping motor, the invention adopts a magnetic field generated after the solenoid is electrified to drive the permanent magnet in the solenoid to deflect, the electrified positive and negative stages of the solenoid are different, and the deflection directions of the generated magnetic field are different.

Under the condition that a system detector carries out PFA (focal plane) non-uniformity correction, the solenoid valve is connected with a 5V power supply, the solenoid valve generates a magnetic field, acting force is generated between the solenoid valve and a permanent magnet inside the solenoid valve, deflection is generated, and the connecting rod and the correction background plate are driven to move back and forth.

The permanent magnet in the solenoid is driven by the way that the solenoid is electrified to generate the change of the magnetic field, the direction of the magnetic field of the permanent magnet is fixed, the solenoid can change the direction of the magnetic field by switching on the positive pole and the negative pole of the power supply, and the interaction of different magnetic fields generates the effect of attraction and repulsion, thereby achieving the effect of switching the background correction sheet.

The electromagnetic driving mode can effectively avoid the problem of motor step loss relative to the driving of the stepping motor, and additionally, the service life of the whole device is prolonged. Particularly, in the aiming system, the problem of inaccurate temperature control caused by the interference of the external environment when no baffle plate is used for correction is solved.

In order to ensure the smoothness of the sliding of the correction sheet and facilitate the preparation, as a preferred implementation scheme, a long-strip-shaped sliding groove which is perpendicular to the movement direction of the correction sheet is arranged on the background correction sheet, a cam pin is arranged at the joint of the connecting rod and the background correction sheet, and the cam pin is slidably connected in the long-strip-shaped sliding groove and can slide along the length direction of the long-strip-shaped sliding groove.

In order to play the effects of limiting, silencing and the like in the movement of the background correction sheet, cushion pads are arranged on two sides of the movement direction of the background correction sheet in the die-casting base.

In the background correction piece switching process, silica gel buffering pads are added on two sides, one function is noise reduction, the other function is mechanical limitation on the correction piece, the correction piece can correspond to the target surface of the FPA in an open or closed state, and the maximum light passing or shielding effect is achieved.

Further preferably, the cushion is made by die-casting silicon rubber with the hardness of 50 degrees, and in order to ensure that the infrared sighting telescope cannot generate too large noise in the process of correcting the non-uniformity and is easy to expose the position of the infrared sighting telescope, noise reduction treatment is needed, in the process of quickly switching the correcting piece, the impact force on the edges of two sides is large, the collision sound of metal and metal is large, the cushion is added for buffering, and the noise can be effectively reduced.

The terminal wire is preferably a commonly used PH1.25 terminal wire. The power supply voltage of the non-uniformity correction device of the infrared sighting telescope is 4.5V-5V, the rated current is 140mA, low power consumption performance is achieved, and the driving requirement of an integrated product can be met by adopting a small terminal wire.

The background correction sheet adopts a stainless steel sheet with the thickness of 0.08mm, the height of two sides is smooth, etching processing is adopted to ensure that the overall surface shape is not changed, and in addition, a vacuum blacking process is adopted to ensure that a black background is pure, the reflectivity is not strong and an extinction effect is achieved.

In the non-uniformity correction device, the correction background sheet is required to be ensured to normally slide, the correction background sheet is 0.08mm, the condition that the parallelism is not enough or the surface roughness is not enough easily exists, meanwhile, a blank punched out by a die casting piece has large deformation due to the punching characteristic in the die casting process, the smoothness of the contact surface between the die casting base and the background correction sheet is better when the contact surface is required to be machined, the die casting base is required to be polished, and the sliding surface is required to be machined and finely milled once, so that the roughness of the sliding surface is less than 0.8 mu m.

The material used by the die-casting base is ADC12 die-casting aluminum, and the die-casting base has high machinability and high corrosion resistance. In an infrared sighting telescope product, the impact resistance and the impact resistance of an integrated product need to meet GJB369A general Specifications for military optical instruments, the impact resistance of the product can reach 300g, and a metallic base can protect a motion inner cavity of a correcting sheet from deformation and avoid the slip sheet from falling off or being stuck in a high-strength impact process.

The gland is a plastic injection mould gland, and preferably, the plastic injection mould gland is injected by adopting an ABS (terpolymer of three monomers of acrylonitrile (A), butadiene (B) and styrene (S)) material with strong injection plasticity and high structural strength; ABS is a material that is chemically resistant, thermally resistant, highly elastic, tough, and thermoplastically formable. In an infrared optical system, the weight is reduced as much as possible under the condition of not influencing the overall performance, and meanwhile, the required material needs to meet the use requirements of low-temperature to high-temperature switching of-40 degrees to +80 degrees and a high-humidity environment.

The invention is suitable for long wave response movement with wave band of 8-14um, and the size of target surface is below (horizontal) 10.88mm (vertical) 8.16mm (diagonal) 13.6 mm.

The prior art is referred to in the art for techniques not mentioned in the present invention.

The shutter device for correcting the heterogeneity of the infrared sighting telescope adopts an electromagnetic valve driving mode, has stable performance, low power consumption and long service life, is suitable for occasions with large environment variation ranges such as outdoor hunting, handheld thermal imagery, side defense warning and the like, can effectively avoid the problem of motor step loss compared with stepping motor driving, and prolongs the service life of the whole device; the non-uniformity correction can be carried out in real time according to the external environment, and the method is more accurate than the method for adjusting and obtaining the internal storage value without the blocking piece; the imaging breadth is large, and the imaging device can be used for 640 movement and meets the target surface requirements of most detectors; furthermore, the background correction sheet is different from common stamping, glass pill spraying or paint spraying processes, a blackening process of vacuum plating is adopted, the background is purer, meanwhile, the detection target surface can be completely covered, and the influence of stray light can be effectively reduced; the base is die-cast aluminum and has strong vibration resistance and shock resistance.

Drawings

FIG. 1 is a schematic diagram of an external structure of an infrared sighting telescope nonuniformity correction shutter device according to the present invention;

FIG. 2 is a right side view of FIG. 1;

FIG. 3 is a bottom view of FIG. 1;

FIG. 4 is a schematic diagram of the switching of the background correction plate of the shutter device for correcting the nonuniformity of the infrared sighting telescope according to the present invention (a is a pressing cover, and fig. b and c are two switching states observed after the pressing cover is opened);

FIG. 5 is an exploded view of an infrared sighting telescope nonuniformity correcting shutter device of the present invention;

FIG. 6 is a schematic view of the internal magnetic field of an energized solenoid;

FIG. 7 is a schematic diagram of the external magnetic field of an energized solenoid;

FIG. 8 is a schematic view of the external magnetic field of a permanent magnet;

in the figure, 1 is a cushion pad, 2 is a die-cast base, 3 is a gland, 4 is a polarizing plate, 5 is a solenoid base, 6 is a solenoid, 7 is a permanent magnet base, 8 is a PH1.25 terminal, 9 is a permanent magnet, 10 is a PCB, 11 is a fixing screw, 12 is a background correction sheet, 13 is a first reservoir, 14 is a second reservoir, 15 is a first window, 16 is a second window, 17 is a third window, 18 is a link, and 19 is an elongated sliding groove.

Detailed Description

In order to better understand the present invention, the following examples are further provided to illustrate the present invention, but the present invention is not limited to the following examples.

A shutter device for correcting the nonuniformity of an infrared sighting telescope comprises a gland, a background correcting sheet and a die-casting base which are sequentially arranged from an image side to a target surface; the background correction sheet is driven by an electromagnetic valve; the background correction sheet serves as a black background plate, providing a frame sample for non-uniformity correction; the electromagnetic valve provides drive for the background correction sheet; the die-casting base is an impact-resistant supporting component.

As shown in fig. 4, the die-casting base is provided with storage tanks, the storage tanks include a rectangular first storage tank and a second storage tank arranged in the center of one side of the first storage tank in the length direction, and the first storage tank and the second storage tank form a convex structure; the electromagnetic valve is arranged in the second storage tank, the background correction sheet is connected in the first storage tank in a sliding mode and can slide along the length direction of the first storage tank, the electromagnetic valve is connected with the background correction sheet through a connecting rod, and the electromagnetic valve drives the connecting rod to drive the background correction sheet to slide along the length direction of the first storage tank; the pressure cover is pressed on the pressure casting base and covers the storage tank completely; a first window is arranged on the gland, a second window is arranged on the die-casting base at the bottom of the first storage tank, a third window is arranged on the background correction sheet, and the first window and the second window are concentrically arranged; under the drive of the electromagnetic valve, when the background correction sheet moves to the maximum displacement of one end of the first storage tank in the length direction, the first window, the second window and the third window are concentrically arranged, and when the background correction sheet moves to the maximum displacement of the other end of the first storage tank in the length direction, the part, which is not windowed, of the background correction sheet completely shields the first window and the second window; under the condition that a system detector corrects the non-uniformity of PFA, the electromagnetic valve is connected with a 5V power supply, the solenoid generates a magnetic field, and generates acting force with the permanent magnet inside to generate deflection and drive the connecting rod and the correction background plate to generate reciprocating motion.

As shown in FIG. 5, the solenoid valve includes a solenoid base, a solenoid, a permanent magnet base, a permanent magnet, a PCB board and a terminal wire; the solenoid base is arranged in the second storage tank; the solenoid is positioned in the solenoid base; the permanent magnet base is positioned in the solenoid, the permanent magnet is positioned in the permanent magnet base, one end of the connecting rod is connected with the permanent magnet base, and the other end of the connecting rod is connected with the background correction sheet; the solenoid electrode lead is connected with the PCB and is led out of the integral structural member of the correction shutter device through a terminal wire; in order to ensure the low-power operation of the product, a polarizing plate (which is positioned in the second storage tank together with the electromagnetic valve) is additionally arranged at the tail part of the electromagnetic valve, after the product is subjected to non-uniformity correction and a background correction sheet returns to an initial position, a power supply can be cut off, and the correction device is ensured not to generate power consumption; as shown in fig. 4-5, the background correction sheet is provided with a strip-shaped sliding groove perpendicular to the movement direction of the background correction sheet, a cam pin is arranged at the joint of the connecting rod and the background correction sheet, and the cam pin is slidably connected in the strip-shaped sliding groove and can slide along the length direction of the strip-shaped sliding groove; in order to play the effects of limiting, silencing and the like in the movement of the background correction piece, cushion pads are arranged on two sides of the movement direction of the background correction piece in the die-casting base, silica gel cushion pads are added on two sides in the switching process of the background correction piece, one effect is silencing, the other effect is mechanical limiting for the correction piece, the correction piece can correspond to the target surface of the FPA in an open or closed state, and the maximum light passing or maximum covering effect is achieved.

TABLE 1 specific parameters of the shutter device for correcting the nonuniformity of the infrared sighting telescope in this example

Table 2 shows the materials of the parts of the example

Reference numerals	Name (R)	Material
			1	Buffer cushion	Silicone rubber
2	Die-casting base	ADC12
			3	Gland	ABS
4	Polarizing plate	SUS304 (containing carbon)
			5	Solenoid base	ABS
6	Solenoid coil	Cu
			7	Permanent magnet base	ABS
8	PH1.25 terminal	Plastic material
			9	Permanent magnet	Neodymium iron boron
10	PCB board	Copper-clad plate
			11	Fixing screw	SUS304
12	Background correction sheet	SUS304 (vacuum plating)

The cushion is made for adopting the silicon rubber die-casting of hardness 50 degrees, can not produce too big noise for guaranteeing that infrared gun sight is carrying out the in-process of inhomogeneous correction, exposes self position easily, so need noise reduction to handle, at the in-process that the correction piece switches fast, the impulsive impact force to both sides edge is big, and the collision sound of metal and metal can be great, adds the silica gel cushion and cushions, can effectual reduction noise's production.

The terminal wire is preferably a commonly used PH1.25 terminal wire. The power supply voltage of the non-uniformity correction device of the infrared sighting telescope is 4.5V-5V, the rated current is 140mA, low power consumption performance is achieved, and the driving requirement of an integrated product can be met by adopting a small terminal wire.

The background correction sheet adopts a stainless steel sheet with the thickness of 0.08mm, the height of two sides is smooth, etching processing is adopted to ensure that the overall surface shape is not changed, and in addition, a vacuum blacking process is adopted to ensure that a black background is pure, the reflectivity is not strong and an extinction effect is achieved.

In the non-uniformity correction device, the correction background sheet is required to be ensured to normally slide, the correction background sheet is 0.08mm, the condition that the parallelism is not enough or the surface roughness is not enough easily exists, meanwhile, a blank punched out by a die casting piece has large deformation due to the punching characteristic in the die casting process, the smoothness of the contact surface between the die casting base and the background correction sheet is better when the contact surface is required to be machined, the die casting base is required to be polished, and the sliding surface is required to be machined and finely milled once, so that the roughness of the sliding surface is less than 0.8 mu m.

The material used by the die-casting base is ADC12 die-casting aluminum, and the die-casting base has high machinability and high corrosion resistance. In an infrared sighting telescope product, the impact resistance and the impact resistance of an integrated product need to meet GJB369A general Specifications for military optical instruments, the impact resistance of the product can reach 300g, and a metallic base can protect a motion inner cavity of a correcting sheet from deformation and avoid the slip sheet from falling off or being stuck in a high-strength impact process.

The gland is a plastic injection mould gland, and preferably, the plastic injection mould gland is injected by adopting an ABS (terpolymer of three monomers of acrylonitrile (A), butadiene (B) and styrene (S)) material with strong injection plasticity and high structural strength; ABS is a material that is chemically resistant, thermally resistant, highly elastic, tough, and thermoplastically formable. In an infrared optical system, the weight is reduced as much as possible under the condition of not influencing the overall performance, and meanwhile, the required material needs to meet the use requirements of low-temperature to high-temperature switching of-40 degrees to +80 degrees and a high-humidity environment.

As shown in fig. 6-8, the permanent magnet inside is driven by energizing the solenoid to generate a change of magnetic field, the direction of the magnetic field of the permanent magnet is fixed, and the solenoid can change the direction of the magnetic field by switching on the positive pole and the negative pole of the power supply, so that the interaction of different magnetic fields generates attraction and repulsion effects, and the effect of switching the background correction sheet is achieved.

The electromagnetic driving mode is relatively driven by the stepping motor, so that the problem of motor step loss can be effectively avoided, the service life of the whole device is prolonged, the shock resistance is improved, and the noise is reduced. Particularly, in the aiming system, the problem of inaccurate temperature control caused by the interference of the external environment when no baffle plate is used for correction is solved.

The technical scheme is suitable for correcting the background of the optical system of the sighting telescope with strong vibration and strong impact, provides the correcting device of the optical detector used on the sighting telescope, and is suitable for occasions with larger environment change ranges such as outdoor hunting, handheld thermal imagery, side defense warning and the like.