Multi-angle visible infrared detector and control method

Abstract

The invention provides a multi-angle visible infrared detector and a control method, an optical guide component is arranged on a Dewar structure, the optical guide component comprises a cold screen and a window frame structure, an optical window sheet is arranged on the window frame structure, and the multi-angle visible infrared detector further comprises a reflecting lens and a heating component; the optical guide member has a heating extension zone, the heating member heats the heating extension zone to extend the heating extension zone, the optical guide member is thus bent, and the detection angle of the optical window sheet deviates due to the bending of the optical guide member. The infrared radiation characteristic of the deviated detection area passes through the optical window sheet and then is reflected by the reflecting lens to reach the infrared detection chip. According to the infrared detector, the L-shaped optical component can be quickly and conveniently packaged, multi-angle detection can be realized without increasing the size and the weight of the detector by more chips and cold screens, the structure is simple, the packaging difficulty is reduced, and the practicability and the flexibility of the infrared detector are greatly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of infrared detectors, and in particular to a multi-angle visible infrared detector and a control method. Background Art

[0002] As a key component in modern technology, infrared detectors are widely used in a variety of fields, including security surveillance, military reconnaissance, and environmental monitoring. Traditional infrared detector optical components typically utilize a regular columnar design. While this design offers advantages in packaging simplicity, it is limited by its narrow field of view, making it difficult to meet the demands of multi-angle detection. To overcome this limitation, the industry has explored multi-chip, multi-angle packaging technology, aiming to achieve wider viewing angle coverage by integrating multiple chips. However, this approach significantly increases costs and severely impairs the cooling performance of the infrared detector due to the large thermal mass of the cold head. This also increases the cost and complexity of chip manufacturing. For example, achieving detection at five different angles requires five cold shields, five chips, and custom-shaped wire bonding for each chip. This not only significantly increases packaging complexity but also significantly increases the size and weight of the product, running counter to the current market trend towards miniaturization and lightweighting.

[0003] To date, there are no infrared detectors on the market that utilize the photothermal effect to modify the dewar structure and adjust the detection area. This is particularly true for applications where non-columnar (e.g., L-shaped) optical components are directly packaged within infrared detectors, as there is currently a lack of effective solutions. Summary of the Invention

[0004] Based on the above content, the present invention provides a multi-angle visible infrared detector and a control method, aiming to solve the technical problems of the multi-angle visible infrared detector in the prior art, such as complex structure, difficult packaging, large size, and heavy weight.

[0005] A multi-angle visible infrared detector, comprising a dewar structure, an optical guide component disposed on the dewar structure, the optical guide component comprising a cold screen and a window frame structure surrounding the cold screen, an optical window disposed on the window frame structure, a reflective lens, a heating component, and a control module, wherein the reflective lens is fixed inside the cold screen;

[0006] The side wall of the window frame structure is in a corrugated shape, the optical guide component has a heating extension area, and the heating component faces the heating extension area;

[0007] The control module is connected to the heating component and is used to generate a heating control instruction to control the heating component to heat the heating extension area so that the heating extension area is extended;

[0008] The optical guiding component bends due to the extension of the heated extension zone, and the detection angle of the optical window deviates due to the bending of the optical guiding component. After the detection angle deviates, the infrared radiation characteristics of the detection area corresponding to the optical window pass through the optical window and are reflected by the reflective lens to reach the infrared detection chip.

[0009] Furthermore, the optical guiding component has at least two heating extension zones, and reflective lenses are fixed to the inner side walls of the cold screen corresponding to the heating extension zones;

[0010] Each heating extension corresponds to a heating element.

[0011] Furthermore, the window frame structure is made of memory alloy, the cold screen is made of elastic material, and the heating extension area is arranged on the side wall of the window frame structure.

[0012] Furthermore, the outer surface of the heating extension zone is provided with a mesh structure.

[0013] Furthermore, the window frame structure is made of memory alloy, the cold screen is made of memory alloy and the side wall of the cold screen is corrugated, the heating extension zone is set on the side wall of the window frame structure, and an infrared anti-reflection film is provided in part of the heating extension zone;

[0014] The heating component is an infrared laser heating component. When the heating component heats the heating extension area, part of the infrared laser is incident on the local area of ​​the cold screen through the infrared anti-reflection film to heat the local area of ​​the cold screen, causing the cold screen to extend due to the heating.

[0015] Furthermore, the infrared detector further includes a motor, which is respectively connected to the control module and the dewar structure;

[0016] The control module is used to: generate motor control instructions to drive the motor to drive the Dewar structure to rotate;

[0017] The optical window deviates to the corresponding target detection area due to the bending of the optical guide component and the rotation of the Dewar structure.

[0018] Furthermore, when there is only one heating extension zone, the optical guiding component is a one-way bending structure, and the angle range of the motor-driven Dewar structure to rotate is 360 degrees.

[0019] Furthermore, when there are two heating extension zones, and the two heating extension zones are respectively arranged on the left and right opposite side walls of the optical guide component;

[0020] The optical guide component is a left and right bidirectional bending structure, and the motor drives the Dewar structure to rotate in an angle range of 90 degrees clockwise and 90 degrees counterclockwise.

[0021] A method for controlling a multi-angle visible infrared detector, for controlling the aforementioned multi-angle visible infrared detector, comprising:

[0022] Step A1: The control module generates a heating control instruction and sends it to the heating component. The heating component heats the heating extension area of ​​the optical guide component according to the heating control instruction, so that the detection angle of the optical window deviates to the target detection area.

[0023] In step A2, the infrared radiation characteristics of the target detection area pass through the optical window and are reflected by the reflective lens to reach the infrared detection chip, and the infrared detection chip receives the infrared radiation characteristics of the target detection area.

[0024] Furthermore, the infrared detector further includes a motor, which is respectively connected to the control module and the dewar structure;

[0025] The control module is used to generate a motor control instruction to drive the motor to rotate the Dewar structure so that the optical window with the detection angle deviated corresponds to the target detection area;

[0026] In step A1, the control module also generates a motor control instruction to drive the motor to rotate the Dewar structure. The optical window deviates to the corresponding target detection area due to the heating of the heating extension area of ​​the optical guide component and the rotation of the Dewar structure.

[0027] The beneficial technical effect of the present invention is that: this patent proposes an innovative solution, which utilizes the temperature response characteristics to achieve the bending change of the Dewar structure through heating, thereby adjusting the optical window to deflect to the target detection area, and realizing multi-angle detection of the infrared detector. Compared with the existing technology, it can not only quickly and conveniently package "L"-shaped optical components, but also does not require more chips and cold screens to increase the volume and weight of the detector, and can achieve multi-angle detection. The structure is simple, the packaging difficulty is reduced, and the practicality and flexibility of the infrared detector are greatly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic structural diagram of a multi-angle visible infrared detector of the present invention that can realize detection in three angle areas;

[0029] Figure 2 This is a schematic diagram of a multi-angle visible infrared detector with a follower rod to achieve structural bending according to the present invention;

[0030] Figure 3 This is a schematic structural diagram of a heating extension area of ​​a multi-angle visible infrared detector of the present invention;

[0031] Figure 4 This is a schematic diagram of a multi-angle visible infrared detector of the present invention that is bidirectionally bendable left and right and rotated with a motor;

[0032] Figure 5 This is a schematic diagram of a multi-angle visible infrared detector of the present invention that is unidirectionally bent and rotated with a motor;

[0033] Figure 6-7 This is a schematic diagram of the structure of a multi-angle visible infrared detector cold screen that can rotate independently;

[0034] Figure 8 This is a flowchart of the steps of a control method of a multi-angle visible infrared detector of the present invention;

[0035] in,

[0036] 1-Window frame structure;

[0037] 2-cold screen;

[0038] 3- Optical windows;

[0039] 4-Reflective lens;

[0040] 5-Infrared detection chip;

[0041] 6-Filter;

[0042] 7-follower rod;

[0043] 8- Heating extension zone;

[0044] 9-Infrared anti-reflection film. DETAILED DESCRIPTION

[0045] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0046] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0047] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but they are not intended to limit the present invention.

[0048] like Figure 1-3 As shown, the present invention provides a multi-angle visible infrared detector, which includes a dewar structure, an optical guide component provided on the dewar structure, the optical guide component including a cold screen 2 and a window frame structure 1 surrounding the outside of the cold screen, an optical window 3 provided on the window frame structure 1, and is characterized in that it also includes a reflective lens 4, a heating component, and a control module, and the reflective lens 4 is fixed inside the cold screen;

[0049] The side wall of the window frame structure 1 is in a corrugated shape, the optical guide component has a heating extension area 8, and the heating component faces the heating extension area 8;

[0050] The control module is connected to the heating component and is used to generate a heating control instruction to control the heating component to heat the heating extension area 8 so that the heating extension area 8 is extended;

[0051] The optical guiding component bends due to the extension of the heated extension zone 8, and the detection angle of the optical window 3 deviates due to the bending of the optical guiding component. After the detection angle deviates, the infrared radiation characteristics of the detection area corresponding to the optical window 3 pass through the optical window 3 and are reflected by the reflective lens 4 to reach the infrared detection chip 5.

[0052] Specifically, a filter 6 is provided in the cold screen area facing the optical window 3 , and the infrared characteristics of the detection area pass through the optical window 3 , the filter 6 , and then through the reflective lens 4 to finally reach the chip 5 .

[0053] This patent proposes an innovative solution that utilizes the temperature response characteristics to achieve bending changes in the Dewar structure through heating, thereby adjusting the optical window to deflect to the target detection area and realizing multi-angle detection of the infrared detector. Compared with the existing technology, it can not only quickly and conveniently package "L"-shaped optical components, but also achieve multi-angle detection without the need for more chips and cold screens to increase the volume and weight of the detector. The structure is simple, the packaging difficulty is reduced, and the practicality and flexibility of the infrared detector are greatly improved.

[0054] Specifically, the heating component is an infrared laser heating component, which uses a specific light source to induce controllable deformation of the optical element. Non-contact heating realizes the change of the Dewar structure, thereby dynamically adjusting the detection area.

[0055] Furthermore, the optical guide component has at least two heating extension areas 8, and a reflective lens 4 is fixed to the inner wall of the cold shield 2;

[0056] Each heating extension zone 8 corresponds to a heating component.

[0057] By setting up multiple heating extension zones 8, when heating a certain heating extension zone 8, the optical window 3 is at a certain angle, which can achieve detection in multiple angle ranges. When the infrared laser irradiates the right heating extension zone, the material of the right heating extension zone 8 undergoes a phase change and begins to extend, and the left side is compressed to form a Dewar structure that detects to the left. Figure 1As shown, heated extension zones are provided on the left and right opposing sidewalls of the optical guide component. When not heated, the upper detection area 1 enters the optical window 3 and can directly reach the infrared detection chip 5. When the right heated extension zone is heated, the heated extension zone bends the window frame structure in the optical guide component to the left, the cold screen bends to the left, and the detection angle of the optical window 3 deflects to the left, allowing infrared detection of the detection area 2. The infrared radiation characteristics of the detection area 2 are reflected by the reflective lens 4 on the right inner wall of the cold screen and enter the infrared detection chip 5. When the left heated extension zone is heated, the heated extension zone bends the window frame structure in the optical guide component to the right, the cold screen bends to the right, and the detection angle of the optical window 3 deflects to the right, allowing infrared detection of the detection area 3. The infrared radiation characteristics of the detection area 3 are reflected by the reflective lens 4 on the left inner wall of the cold screen and enter the infrared detection chip 5.

[0058] Further, such as Figure 2 As shown, at least one follower rod 7 is connected between the cold screen 2 and the window frame 1. The window frame can be bent due to deformation and the cold screen can be bent along with it.

[0059] Furthermore, the window frame structure 1 is made of memory alloy, the cold screen 2 is made of elastic material, and the heating extension area 8 is arranged on the side wall of the window frame structure 1 .

[0060] When the memory alloy is heated to a certain temperature, it will expand, and when it is cooled to a certain temperature, it will return to its original shape.

[0061] Specifically, the memory alloy may be a nickel-titanium based alloy, a copper based alloy, or an iron based alloy.

[0062] Specifically, the elastic material can be made of elastic rubber, such as black light-absorbing rubber or a rubber surface coated with a black light-absorbing coating. When the cold screen is made of elastic material, it can be formed through injection molding, extrusion, or 3D printing. After forming, the reflective lens is mounted on the inner wall using a positioning fixture and connected to the window frame structure via a follower rod. The follower rod moves with the movement of the window, causing the cold screen to flex.

[0063] The window frame structure 1 is designed as a thin-walled member in the shape of a bellows with a thickness of 0.1-0.4 mm, so that it has compressibility and stretchability in structure.

[0064] Specifically, the extension zone is heated to a deformation temperature (60-100° C.), and then a fixture can be used to fix the window frame structure in the high-temperature shape.

[0065] When the window frame structure 1 is made of memory alloy and the cold screen 2 is made of elastic material, the side wall of the cold screen may be in a corrugated shape.

[0066] Furthermore, the outer surface of the heating extension zone 8 is provided with a mesh structure.

[0067] like Figure 3 As shown, the entire outer surface of the heated extension zone 8 can be provided with a mesh structure. The heated extension zone is etched with a mesh structure using ultrafast lasers to increase its absorption rate of infrared laser light. This is because the mesh structure has many tiny uneven areas and holes formed within it. When the infrared laser is irradiated by these structures, multiple reflections and scatterings occur, extending the time the light acts on the material surface and increasing the likelihood of light being absorbed by the material.

[0068] Furthermore, the window frame structure 1 is made of memory alloy, the cold screen 2 is made of memory alloy and has a corrugated shape, the heating extension zone 8 is provided on the side wall of the window frame structure 1, and an infrared anti-reflection film 9 is provided in a part of the heating extension zone 1;

[0069] The heating component is an infrared laser heating component. When the heating component heats the heating extension area 8, part of the infrared laser passes through the infrared anti-reflection film 9 and is incident on the local area of ​​the cold screen to heat the local area of ​​the cold screen 2, causing the cold screen 2 to extend due to the heating.

[0070] like Figure 6 and Figure 7 As shown, the window frame structure and the cold screen are both made of memory alloy. The infrared laser generated by the infrared laser heating component is incident on a local area of ​​the cold screen through the infrared anti-reflection film, and the temperature of the cold screen in this area rises, thereby extending. In this case, it is not necessary to set a follower rod to connect the window frame structure and the cold screen, so that the window frame structure and the cold screen can move and bend independently, thereby achieving the purpose of the optical window 3 detecting angular deflection.

[0071] Specifically, the memory alloy may be a nickel-titanium based alloy, a copper based alloy, or an iron based alloy.

[0072] The infrared anti-reflection film 9 is welded to the side wall of the window frame structure 1 .

[0073] When the same memory alloy is used, the cold screen also adopts a bellows structure similar to the window frame structure 1 and adopts the same heat treatment process to achieve synchronous bending with the window component.

[0074] Furthermore, the infrared detector further includes a motor, which is respectively connected to the control module and the dewar structure;

[0075] The control module is used to: generate motor control instructions to drive the motor to drive the Dewar structure to rotate;

[0076] The optical window 3 deviates to the corresponding target detection area due to the bending of the optical guide component and the rotation of the Dewar structure.

[0077] Heating can also induce controlled deformation of the optical guide component, combined with the direction-changing function of the motion device (the motor drives the dewar structure to rotate), to achieve wide-area detection and continuous tracking and detection of target objects, greatly improving the practicality and flexibility of infrared detectors. This breakthrough has opened up a new direction for the development of infrared detection technology and is expected to drive the entire industry to a higher level.

[0078] Furthermore, when there is only one heating extension zone 8, the optical guiding component is a one-way bending structure, and the angle range of the motor-driven Dewar structure to rotate is 360 degrees.

[0079] like Figure 5 As shown, the optical guide component is bent in one direction, namely the left direction, and the Dewar structure rotates 360 degrees to achieve angle detection in all directions of 360 degrees.

[0080] Furthermore, when there are two heating extension zones 8, and the two heating extension zones 8 are respectively arranged on the left and right opposite side walls of the optical guide component;

[0081] The optical guide component is a left and right bidirectional bending structure, and the motor drives the Dewar structure to rotate in an angle range of 90 degrees clockwise and 90 degrees counterclockwise.

[0082] Regardless of whether the cold screen is made of elastic material that bends passively with the window frame structure, or is made of memory alloy that can bend independently, it can support a bidirectional bending structure or a unidirectional bending structure, and can also use a motor to rotate the Dewar structure.

[0083] like Figure 4 As shown, it can be bent left and right, and the Dewar structure can rotate 90 degrees clockwise and 90 degrees counterclockwise. Combined with the two-way bending, it can achieve angle detection in all directions of 360 degrees.

[0084] like Figure 8 As shown, the present invention also provides a control method for a multi-angle visible infrared detector, which is used to control the multi-angle visible infrared detector as described above, comprising:

[0085] Step A1: The control module generates a heating control instruction and sends it to the heating component. The heating component heats the heating extension area of ​​the optical guide component according to the heating control instruction, so that the detection angle of the optical window deviates to the target detection area.

[0086] In step A2, the infrared radiation characteristics of the target detection area pass through the optical window and are reflected by the reflective lens to reach the infrared detection chip, and the infrared detection chip receives the infrared radiation characteristics of the target detection area.

[0087] By utilizing the temperature response characteristics and achieving the bending change of the Dewar structure through heating, the optical window is adjusted to deflect to the target detection area, realizing multi-angle detection of the infrared detector. Compared with the existing technology, it can not only quickly and conveniently package the "L"-shaped optical components, but also realize multi-angle detection without the need for more chips and cold screens to increase the volume and weight of the detector. The structure is simple and the packaging difficulty is reduced, which greatly improves the practicality and flexibility of the infrared detector.

[0088] Furthermore, the infrared detector further includes a motor, which is respectively connected to the control module and the dewar structure;

[0089] The control module is used to generate a motor control instruction to drive the motor to rotate the Dewar structure so that the optical window with the detection angle deviated corresponds to the target detection area;

[0090] In step A1, the control module also generates a motor control instruction to drive the motor to rotate the Dewar structure. The optical window deviates to the corresponding target detection area due to the heating of the heating extension area of ​​the optical guide component and the rotation of the Dewar structure.

[0091] This patent allows for quick and easy packaging of L-shaped optical components. It also allows for controllable deformation of the optical components to change the detection area. By changing the direction of motion through the motion device, the target can be continuously detected and tracked.

[0092] The above are only preferred embodiments of the present invention and do not limit the implementation mode and protection scope of the present invention. For those skilled in the art, it should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. A multi-angle visible infrared detector, comprising a dewar structure, an optical guide component disposed on the dewar structure, the optical guide component comprising a cold screen and a window frame structure surrounding the cold screen, the window frame structure being provided with an optical window, characterized in that: It also includes a reflective lens, a heating component, and a control module, wherein the reflective lens is fixed inside the cold screen; The side wall of the window frame structure is in a corrugated shape, the optical guiding component has a heating extension area, and the heating component faces the heating extension area; The control module is connected to the heating component and is used to generate a heating control instruction to control the heating component to heat the heating extension area so that the heating extension area is extended; The optical guiding component is bent due to the extension of the heated extension zone, and the detection angle of the optical window is deviated due to the bending of the optical guiding component. After the detection angle deviates, the infrared radiation characteristics of the detection area corresponding to the optical window pass through the optical window and are reflected by the reflective lens to reach the infrared detection chip.

2. The multi-angle visible infrared detector according to claim 1, characterized in that: The optical guiding component has at least two heating extension areas, and the reflective lens is fixed to the inner side wall of the cold screen corresponding to the heating extension area; Each of the heating extension zones corresponds to one of the heating components.

3. The multi-angle visible infrared detector according to claim 1, characterized in that: The window frame structure is made of memory alloy, the cold screen is made of elastic material, and the heating extension zone is arranged on the side wall of the window frame structure.

4. The multi-angle visible infrared detector according to claim 1, characterized in that: The outer surface of the heating extension zone is provided with a mesh structure.

5. The multi-angle visible infrared detector according to claim 1, characterized in that: The window frame structure is made of memory alloy, the cold screen is made of memory alloy and the side wall of the cold screen is corrugated, the heating extension zone is arranged on the side wall of the window frame structure, and an infrared anti-reflection film is partially provided in the heating extension zone; The heating component is an infrared laser heating component. When the heating component heats the heating extension area, part of the infrared laser passes through the infrared anti-reflection film and is incident on a local area of ​​the cold screen to heat the local area of ​​the cold screen, so that the cold screen is extended due to the heating.

6. The multi-angle visible infrared detector according to claim 2, characterized in that: The infrared detector further includes a motor, which is connected to the control module and the Dewar structure respectively; The control module is used to: generate a motor control instruction to drive the motor to drive the Dewar structure to rotate; The optical window deviates to a corresponding target detection area due to the bending of the optical guiding component and the rotation of the Dewar structure.

7. The multi-angle visible infrared detector according to claim 6, characterized in that: When there is only one heating extension zone, the optical guiding component is a one-way bending structure, and the angle range of the motor driving the Dewar structure to rotate is 360 degrees.

8. The multi-angle visible infrared detector according to claim 6, characterized in that: When there are two heating extension zones, and the two heating extension zones are respectively arranged on the left and right opposite side walls of the optical guiding component; The optical guiding component is a left-right bidirectional bending structure, and the angle range of the motor driving the Dewar structure to rotate is 90 degrees clockwise and 90 degrees counterclockwise.

9. A control method for a multi-angle visible infrared detector, characterized in that: Used to control the multi-angle visible infrared detector according to any one of claims 1 to 8, comprising: Step A1: The control module generates a heating control instruction and sends it to the heating component. The heating component heats the heating extension area of ​​the optical guiding component according to the heating control instruction, so that the detection angle of the optical window deviates to the target detection area. In step A2, the infrared radiation characteristics of the target detection area pass through the optical window and are reflected by the reflective lens to reach the infrared detection chip, and the infrared detection chip receives the infrared radiation characteristics of the target detection area.

10. The control method of a multi-angle visible infrared detector according to claim 9, characterized in that: The infrared detector further includes a motor, which is connected to the control module and the Dewar structure respectively; The control module is used to generate a motor control instruction to drive the motor to drive the Dewar structure to rotate, so that the optical window after the detection angle deviates corresponds to the target detection area; In step A1, the control module further generates a motor control instruction to drive the motor to rotate the Dewar structure, and the optical window deviates to the corresponding target detection area due to the heating of the heating extension area of ​​the optical guide component and the rotation of the Dewar structure.

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