Axial consistency calibration system and method for multi-optical axis window device

Abstract

The present application relates to a system and method for calibrating the axial consistency of a multi-axis window device, and belongs to the field of optical metrology and measurement technology. The calibration system includes a target generation component, a test bench, a fiber coupling component, a long focal length collimation component, and a control component. The calibration method is used to execute the operation process of the calibration system. The calibration system and calibration method proposed in this application can meet the measurement and calibration requirements of various types of multi-axis window devices, and provide a guarantee for the axial consistency parameter testing of multi-axis window devices.

Description

Technical Field

[0001] The present application relates to the field of optical metrology and measurement technology, and in particular to a system and method for calibrating the axial consistency of a multi-optical axis window device. Background Art

[0002] Traditional optoelectronic reconnaissance equipment primarily includes visible light, infrared, and low-light-level night vision devices. Infrared devices are completely ineffective because infrared light cannot penetrate glass. Visible light and low-light-level night vision devices, however, are subject to strong reflections from the glass surface or other highly reflective media, severely impacting their detection efficiency. This prevents observers or image capture devices from clearly capturing images of people and objects within the window, rendering effective through-the-window detection impossible.

[0003] The multi-axis window-through device is a new type of photoelectric detection device, and its main application scenario is to detect and identify targets and environmental information such as those inside a house or a car through window media such as glass or coated glass. At present, in the application of multi-axis window-through devices, the most widely used method is active window-through imaging technology, the principle of which is to use a laser to emit laser light to illuminate the target inside the window. Since the emitted laser light has the characteristics of strong directionality and concentrated energy, it can enhance the laser signal reflected back from the target inside the window, and then the reflected laser signal is imaged and processed, thereby achieving the purpose of window-through detection. Therefore, in the multi-axis window-through device, the axial consistency of the transmitting component, the axial consistency of the receiving component, and the common axial consistency of the transmitting component and the receiving component become key parameters for evaluating the detection capability of the multi-axis window-through device. However, the existing axial consistency calibration device for multi-axis window-through devices has the following problems:

[0004] First, most existing multi-axis window devices use the laser axis or the laser emission axis of the device under test as the reference axis to measure other axes. This makes it impossible to analyze the emission axis of the multi-axis window device and is not suitable for measuring the axial consistency of the transmitting component of the multi-axis window device, or the common axial consistency of the transmitting component and the receiving component.

[0005] Secondly, many existing multi-axis window devices are used to measure the axial consistency of the optical axis of the optoelectronic system of the multi-spectral sensor. However, the existing axial consistency calibration or detection systems cannot meet the evaluation and calibration of the parameters of the axial consistency of the transmitting component, the axial consistency of the receiving component, and the common axial consistency of the transmitting component and the receiving component in the multi-axis window device.

[0006] Therefore, it is necessary to propose a solution to improve one or more problems existing in the above-mentioned related technical solutions.

[0007] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of this application, and therefore may include information that does not constitute prior art known to ordinary technicians in this field. Summary of the Invention

[0008] A first aspect of an embodiment of the present application provides an axial consistency calibration system for a multi-optical axis window device, the axial consistency calibration system comprising:

[0009] A target generation component, comprising a light source switching component, a circular cross target, a target panel, and a spectroscope. The light source switching component is used to provide illumination for the circular cross target. The target panel is provided with a target surface scanner, which is used to control and read the movement of the circular cross target.

[0010] A test bench is provided with a calibrated multi-axis window device, the calibrated multi-axis window device comprising a lighting assembly and a distance measuring assembly arranged in parallel, the distance measuring assembly being located above the lighting assembly, and a neutral attenuation sheet set being provided on the test bench in front of the distance measuring assembly; the lighting assembly comprising an illumination transmitter and an illumination receiver, and the distance measuring assembly comprising a distance measuring transmitter and a distance measuring receiver;

[0011] A fiber coupling assembly, the fiber coupling assembly comprising a fiber coupling mirror and a coupling scanning component connected to each other, wherein the coupling scanning component is provided with a star point target;

[0012] A long focal length collimating assembly, the long focal length collimating assembly comprising a parabolic reflector and a secondary reflector;

[0013] The laser light emitted by the ranging transmitter is attenuated by the neutral attenuation plate group, and then projected onto the star point target through the fiber coupling mirror, and then projected onto the beam splitter through the star point target; then projected onto the secondary reflector by the beam splitter, and reflected onto the parabolic reflector through the secondary reflector, and finally reflected to the ranging receiver through the parabolic reflector, thereby achieving calibration of the common axial consistency of the ranging transmitter and the ranging receiver;

[0014] A control component is connected to the target generation component, the test bench and the optical fiber coupling component respectively.

[0015] In an exemplary embodiment of the present application, the light source switching component includes an integrating sphere light source and a blackbody light source, and both the integrating sphere light source and the blackbody light source are connected to the control component;

[0016] The integrating sphere light source is used to provide illumination from visible light to near-infrared light for the circular cross target, and is capable of detecting and responding to the near-infrared photodetector of the calibrated multi-axis device;

[0017] The blackbody light source is used to provide infrared light band illumination for the circular cross target and is capable of detecting and responding to the infrared photoelectric detector of the calibrated multi-axis window device.

[0018] In an exemplary embodiment of the present application, the substrate of the target panel is made of ZnS material.

[0019] In an exemplary embodiment of the present application, the annular cross target and the star point target are both arranged on the focal plane of the long focal length collimating assembly;

[0020] The circular cross target is used to provide a cross alignment baseline and a circular alignment baseline for the calibrated multi-axis window device.

[0021] In an exemplary embodiment of the present application, the neutral attenuation sheet group is arranged on the test bench in front of the ranging transmitter.

[0022] In an exemplary embodiment of the present application, the control assembly includes a control element and a computer connected to each other, wherein the control element is respectively connected to the target generation assembly, the test bench, and the optical fiber coupling assembly;

[0023] The computer is used to display and adjust the information of the control component.

[0024] A second aspect of an embodiment of the present application provides an axial consistency calibration method for a multi-optical axis window device. The axial consistency calibration method is used to perform the operation process of the above-mentioned axial consistency calibration system. The axial consistency calibration method includes the following steps:

[0025] Calibrate the axial consistency of the illumination assembly of the calibrated multi-axis window device, including calibrating the axial consistency of the illumination emitting element, calibrating the axial consistency of the illumination receiving element, and calibrating the common axial consistency of the illumination emitting element and the illumination receiving element;

[0026] The axial consistency calibration of the distance measuring component of the multi-axis window device to be calibrated includes the common axial consistency calibration of the distance measuring transmitting component and the distance measuring receiving component.

[0027] In an exemplary embodiment of the present application, the step of calibrating the axial consistency of the lighting emitter includes:

[0028] Operating the calibrated multi-axis window device to switch to a small beam divergence angle;

[0029] Turn on the laser light source of the illumination emitting element in the multi-axis window device being calibrated. The generated laser light passes through the parabolic reflector, the secondary reflector, and the beam splitter in sequence, ultimately forming a light spot at the focal plane of the long-focal-length collimator assembly. The light spot is aligned with the circular alignment baseline of the circular cross target.

[0030] Operating the calibrated multi-axis window device to simulate different window distance values, and obtaining a calibration result of the axial consistency of the illumination emitter by calculating the movement amount on the target surface scanning piece of the annular cross target;

[0031] The step of calibrating the axial consistency of the illumination receiving element comprises:

[0032] Controlling the target generating component to generate a cross alignment baseline, and sequentially passing through the beam splitter, the secondary reflector and the parabolic reflector to form an infinitely distant target to be received by the illumination receiving component;

[0033] Controlling the test bench to adjust the posture of the calibrated multi-axis window device so that the electric cross-scale of the calibrated multi-axis window device coincides with the cross-scale alignment baseline generated by the target generation component;

[0034] operating the calibrated multi-axis window device to simulate different window distance values, and obtaining an axial consistency calibration result of the illumination receiving element by calculating the movement amount of the electric cross-scale of the calibrated multi-axis window device;

[0035] The step of calibrating the common axial consistency of the illumination emitting element and the illumination receiving element comprises:

[0036] Controlling the target generating assembly to generate a cross alignment baseline, and sequentially passing through a beam splitter, a secondary reflector, and a parabolic reflector to form an infinitely distant target to be received by the illumination receiving element;

[0037] Controlling the test bench to adjust the posture of the calibrated multi-axis window device so that the electric cross-scale of the calibrated multi-axis window device coincides with the cross-scale alignment baseline generated by the target generation component;

[0038] Operating the illumination emitting element of the calibrated multi-optical-axis window device to simulate a certain window distance value, and switching to a small beam divergence angle;

[0039] Turning on the laser light source of the illumination emitting element in the calibrated multi-axis window device, the generated laser light passes through the parabolic reflector, the secondary reflector and the beam splitter in sequence, and finally forms a light spot at the focal plane position of the long focal length collimation component;

[0040] Move the target surface scanning part so that the light spot coincides with the circular alignment baseline of the circular cross target, and by calculating the movement amount on the target surface scanning part, obtain the common axial consistency calibration result of the illumination emitting part and the illumination receiving part at the current window distance value.

[0041] In an exemplary embodiment of the present application, the expression for calibrating the axial consistency of the illumination emitter is:

[0042]

[0043] Wherein, θ1 represents the calibration result of the axial consistency of the illumination emitter, d1 represents the movement of the circular cross target, and f1 represents the focal length of the long focal length collimator assembly;

[0044] The expression for calibrating the axial consistency of the illumination receiving element is:

[0045]

[0046] Wherein, θ2 represents the calibration result of the axial consistency of the illumination receiving element, n represents the number of pixels of the movement of the detector cross-grain, D represents the pixel size, and f2 represents the focal length of the calibrated multi-axis window device.

[0047] In an exemplary embodiment of the present application, the step of calibrating the common axial consistency of the ranging transmitter and the ranging receiver includes:

[0048] Adjusting the test bench so that the distance measurement receiving component is aligned with the long focal length collimation component and the target generating component generates a cross to align with the baseline;

[0049] Turn on the laser light source, the ranging transmitter emits laser light, and the laser light passes through the neutral attenuation plate group and the fiber coupling mirror in sequence and is projected onto the star point target;

[0050] Operate the calibrated multi-axis window device to perform distance measurement, and control the coupling scanning component of the optical fiber coupling assembly to move to the two edge critical points of the receiving field of view. At this time, the zero position of the optical fiber coupling assembly is the calibration result of the common axial consistency of the ranging transmitter and the ranging receiver;

[0051] The expression for calibrating the common axial consistency of the ranging transmitter and the ranging receiver is:

[0052]

[0053] Wherein, θ3 represents the calibration result of the common axial consistency of the ranging transmitter and the ranging receiver, d2 represents the movement of the laser center position of the ranging component from the zero position, x iIndicates an edge critical point of the receiving field of view when the coupled scanning piece moves in the x-axis direction, x i Indicates another edge critical point of the receiving field of view when the coupled scanning piece moves in the x-axis direction, y j Indicates an edge critical point of the receiving field of view when the coupled scanning piece moves in the y-axis direction, y j It indicates another edge critical point of the receiving field of view when the coupled scanning piece moves in the y-axis direction.

[0054] Beneficial effects:

[0055] This application proposes a system and method for calibrating the axial consistency of a multi-axis window device, which has at least the following beneficial effects:

[0056] (1) This application uses a circular cross target to analyze the emission axis of the multi-axis window device being calibrated. This can cover the calibration of parameters such as the axial consistency of the emitter, the axial consistency of the receiver, and the common axial consistency of the emitter and receiver of various types of multi-axis window devices.

[0057] (2) By configuring the light source switching element to include an integrating sphere light source and a blackbody light source, the present application enables the spectral range of the calibrated multi-axis window device to cover the visible light band, the near-infrared light band, the mid-wave infrared light band, and the long-wave infrared light band;

[0058] (3) This application, through the design of a fiber-optic coupling assembly, not only meets the requirements for identifying and receiving coded lasers, but also utilizes the fiber length distance to replace the actual spatial distance for ranging, making the actual spatial distance greater than the blind spot distance. By controlling the coupling scanning element in the fiber-optic coupling assembly to scan and obtain the two edge critical points of the receiving field of view, the common axial consistency of the ranging transmitter and the ranging receiver can be calibrated. BRIEF DESCRIPTION OF THE DRAWINGS

[0059] The accompanying drawings are incorporated into and constitute a part of the specification, illustrate embodiments consistent with the present application, and together with the specification, are used to explain the principles of the present application. Obviously, the drawings described below are only some embodiments of the present application, and those skilled in the art can derive other drawings based on these drawings without inventive effort.

[0060] Figure 1 A schematic structural diagram of an axial consistency calibration system for a multi-optical axis window device in an exemplary embodiment of the present application is shown;

[0061] Figure 2 A schematic diagram showing a circular cross target in an exemplary embodiment of the present application;

[0062] Figure 3A schematic diagram showing the steps of a method for calibrating the axial consistency of a multi-optical-axis window device in an exemplary embodiment of the present application is shown.

[0063] In the figure, 100, axial consistency calibration system; 110, target generation component; 111, light source switching component; 1111, integrating sphere light source; 1112, blackbody light source; 112, circular cross target; 113, target panel; 1131, target surface scanning component; 114, spectroscope; 120, test bench; 121, multi-axis window device to be calibrated; 1211, lighting component; 1211a, lighting emission component; 1211b, lighting Bright receiving element; 1212, ranging component; 1212a, ranging transmitting element; 1212b, ranging receiving element; 122, neutral attenuation plate group; 130, fiber optic coupling component; 131, fiber optic coupling mirror; 132, coupling scanning element; 1321, star target; 140, long focal length collimation component; 141, secondary reflector; 142, parabolic reflector; 150, control component; 151, control element; 152, computer. DETAILED DESCRIPTION

[0064] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be embodied in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete and will fully convey the concepts of the example embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0065] In addition, the accompanying drawings are merely schematic illustrations of the present application and are not necessarily drawn to scale. Identical reference numerals in the figures denote identical or similar parts, and thus repetitive descriptions thereof will be omitted. Some of the blocks shown in the accompanying drawings are functional entities that do not necessarily correspond to physically or logically separate entities. These functional entities may be implemented in software, in one or more hardware modules or integrated circuits, or in different networks and / or processor devices and / or microcontroller devices.

[0066] In a first aspect, this exemplary embodiment provides an axial consistency calibration system 100 for a multi-axis window device. Figure 1 As shown, the axial consistency calibration system 100 includes:

[0067] The target generation assembly 110 includes a light source switching component 111, a circular cross target 112, a target panel 113, and a beam splitter 114. The light source switching component 111 is used to provide illumination for the circular cross target 112. The target panel 113 is provided with a target surface scanning component 1131, which is used to control and read the movement of the circular cross target 112.

[0068] A test bench 120 is provided with a calibrated multi-axis window device 121. The calibrated multi-axis window device 121 includes a parallel illumination assembly 1211 and a distance measurement assembly 1212. The distance measurement assembly 1212 is located above the illumination assembly 1211. A neutral attenuation sheet set 122 is provided on the test bench 120 in front of the distance measurement assembly 1212. The illumination assembly 1211 includes an illumination transmitter 1211a and an illumination receiver 1211b. The distance measurement assembly 1212 includes a distance measurement transmitter 1212a and a distance measurement receiver 1212b.

[0069] A fiber coupling assembly 130, comprising a fiber coupling mirror 131 and a coupling scanning component 132 connected to each other, wherein a star target 1321 is provided on the coupling scanning component 132;

[0070] A long focal length collimating assembly 140 , the long focal length collimating assembly 140 comprising a parabolic reflector 142 and a secondary reflector 141 ;

[0071] The laser emitted by the ranging transmitter 1212a is attenuated by the neutral attenuator assembly 122, then projected onto the star target 1321 through the fiber coupling mirror 131, and then onto the beam splitter 114 through the star target 1321. The beam splitter 114 then projects the laser onto the secondary reflector 141, and then reflects the laser onto the parabolic reflector 142. Finally, the laser is reflected by the parabolic reflector 142 to the ranging receiver 1212b, thereby calibrating the common axial consistency of the ranging transmitter 1212a and the ranging receiver 1212b.

[0072] The control component 150 is connected to the target generation component 110, the test bench 120 and the optical fiber coupling component 130 respectively.

[0073] In a first aspect, an embodiment of the present application provides an axial consistency calibration system 100 for a multi-optical-axis window device, which has at least the following beneficial effects:

[0074] (1) This application uses the circular cross target 112 to analyze the emission axis of the calibrated multi-axis window device 121, which can cover the calibration of parameters such as the axial consistency of the emitter, the axial consistency of the receiver, and the common axial consistency of the emitter and receiver of various types of multi-axis window devices;

[0075] (2) By configuring the light source switching element 111 to include an integrating sphere light source 1111 and a blackbody light source 1112, the spectral range of the calibrated multi-axis window device 121 can cover the visible light band, the near-infrared light band, the mid-wave infrared light band, and the long-wave infrared light band;

[0076] (3) By designing the fiber coupling assembly 130, the present application not only meets the requirements for identifying and receiving coded laser light, but also utilizes the fiber length distance to replace the actual spatial distance for ranging, making the actual spatial distance greater than the blind spot distance. By controlling the coupling scanning element 132 in the fiber coupling assembly 130 to scan and obtain the two edge critical points of the receiving field of view, the common axial consistency of the ranging transmitter 1212a and the ranging receiver 1212b can be calibrated.

[0077] Next, an axial consistency calibration system 100 and method for a multi-optical-axis window device proposed in this exemplary embodiment will be described in more detail.

[0078] In a first aspect, this embodiment provides an axial consistency calibration system 100 for a multi-optical-axis window device.

[0079] In one embodiment, the target generation component 110 includes a light source switching component 111. The light source switching component 111 includes an integrating sphere light source 1111 and a blackbody light source 1112, and the integrating sphere light source 1111 and the blackbody light source 1112 are respectively connected to the control component 150. The integrating sphere light source 1111 is used to provide illumination of the circular cross target 112 in the visible to near-infrared light band, and is capable of detecting and responding to the near-infrared photodetector of the calibrated multi-axis window device 121. The blackbody light source 1112 is used to provide illumination of the circular cross target 112 in the infrared light band, and is capable of detecting and responding to the infrared photodetector of the calibrated multi-axis window device 121.

[0080] In the embodiment of the present application, by setting the light source switching component 111 to include an integrating sphere light source 1111 and a blackbody light source 1112, the spectral range of the calibrated multi-axis window device 121 can cover the visible light band, near-infrared light band, mid-wave infrared light band and long-wave infrared light band.

[0081] In one embodiment, the substrate of the target panel 113 is ZnS material, so that its light transmittance in the wavelength range of 0.4μm to 12μm is greater than 90%, and can cover the calibration requirements of the calibrated multi-axis window device 121 for multiple bands such as visible light, near-infrared light, mid-band infrared light and long-wave infrared light.

[0082] In one embodiment, Figure 2 As shown, the annular cross target 112 and the star target 1321 are both placed on the focal plane of the long focal length collimating assembly 140. The annular cross target 112 is used to provide a cross alignment baseline and an annular alignment baseline for the multi-axis window device 121 to be calibrated.

[0083] In the embodiment of the present application, the emission axis of the calibrated multi-axis window device 121 is analyzed by using the circular cross target 112, which can cover the calibration of parameters such as the axial consistency of the emitter, the axial consistency of the receiver, and the common axial consistency of the emitter and the receiver of various types of multi-axis window devices.

[0084] In one embodiment, the lighting assembly 1211 includes a lighting transmitter 1211a and a lighting receiver 1211b; the distance measuring assembly 1212 includes a distance measuring transmitter 1212a and a distance measuring receiver 1212b;

[0085] The neutral attenuation sheet group 122 is disposed on the test bench 120 in front of the ranging transmitter 1212 a .

[0086] In one embodiment, a fiber coupling mirror 131 is used to guide the laser light emitted by the ranging assembly 1212 through an optical fiber into the long-focal-length collimator assembly 140, projecting it onto a star target 1321. This satisfies the requirements for coded laser recognition and reception. Furthermore, the fiber length can be used to replace the actual spatial distance for ranging, making the actual spatial distance greater than the blind spot distance. By controlling the coupling scanner 132 in the fiber coupling assembly 130 to scan and obtain the two critical edge points of the receiving field of view, the common axial alignment of the ranging transmitter 1212a and the ranging receiver 1212b can be calibrated.

[0087] Furthermore, the coupling scanning element 132 is used to control the scanning motion of the introduced laser and the target panel 113 on the focal plane of the long focal length collimating assembly 140 and record their positions when calibrating the common axial consistency of the ranging receiver 1212b and the ranging transmitter 1212a.

[0088] Furthermore, the target surface scanner 1131 is used to control and read the movement of the annular cross target 112 in the focal plane of the long focal length collimating assembly 140 when calibrating the axial consistency of the illumination emitting element 1211 a .

[0089] Furthermore, the long focal length collimating component 140 is used to collimate and project the target pattern generated by the target generating component 110 to the calibrated multi-axis window device 121, and at the same time receive, align and focus the laser emitted by the calibrated multi-axis window device 121 without distortion to the target generating component 110.

[0090] Furthermore, the test bench 120 of this embodiment is preferably a multi-dimensional adjustment test bench 120 .

[0091] It should be noted that: in the embodiment of the present application, in addition to being able to calibrate the common axial consistency of the ranging transmitter 1212a and the ranging receiver 1212b, it is also possible to calibrate the axial consistency of the lighting transmitter 1211a, the axial consistency of the lighting receiver 1211b, and the common axial consistency of the lighting transmitter 1211a and the lighting receiver 1211b.

[0092] In one embodiment, the control assembly 150 includes a control unit 151 and a computer 152. The control unit 151 is connected to the target generation assembly 110, the test bench 120, and the fiber coupling assembly 130. The computer 152 is used to display and control information from the control unit 151.

[0093] The second aspect of this embodiment provides a method for calibrating the axial consistency of a multi-axis window device, such as Figure 3 As shown, the axial consistency calibration method may include the following steps:

[0094] The process of calibrating the axial consistency of the lighting emitter is as follows:

[0095] First, operate the calibrated multi-axis window device to switch to a small beam divergence angle;

[0096] Next, the laser light source of the illumination transmitter in the multi-axis window device being calibrated is turned on. The generated laser light passes through the parabolic reflector, secondary reflector, and beam splitter in sequence, and finally forms a light spot at the focal plane of the long focal length collimator. The light spot is then aligned with the circular alignment baseline of the circular cross target.

[0097] Finally, the multi-axis window device to be calibrated is operated to simulate different window distance values, and the axial consistency calibration result of the lighting emitter is obtained by calculating the movement amount on the target surface scanning part of the circular cross target.

[0098] Furthermore, the expression for calibrating the axial consistency of the lighting emitter is:

[0099]

[0100] Wherein, θ1 represents the calibration result of the axial consistency of the illumination emitter, d1 represents the movement of the circular cross target, and f1 represents the focal length of the long focal length collimating assembly.

[0101] The process of calibrating the axial consistency of the illumination receiver is as follows:

[0102] First, the target generating assembly is controlled to generate a cross alignment baseline, which passes through the beam splitter, secondary reflector and parabolic reflector in sequence to form an infinitely distant target that is received by the illumination receiving element;

[0103] Then, the test bench is controlled to adjust the posture of the multi-axis window device to be calibrated so that the electric cross-scale of the multi-axis window device to be calibrated coincides with the cross-scale alignment baseline generated by the target generation component;

[0104] Finally, the calibrated multi-axis window device is operated to simulate different window distance values, and the axial consistency calibration result of the illumination receiving element is obtained by calculating the movement amount of the electric cross scale of the calibrated multi-axis window device.

[0105] Furthermore, the expression for calibrating the axial consistency of the illumination receiving element is:

[0106]

[0107] Wherein, θ2 represents the calibration result of the axial consistency of the illumination receiving element, n represents the number of pixels of the movement of the detector cross-grain, D represents the pixel size, and f2 represents the focal length of the calibrated multi-axis window device.

[0108] The process of calibrating the common axial alignment of the lighting transmitter and the lighting receiver is as follows:

[0109] First, the target generating assembly is controlled to generate a cross alignment baseline, which passes through the beam splitter, secondary reflector and parabolic reflector in sequence to form an infinitely distant target that is received by the illumination receiving element;

[0110] Next, the test bench is controlled to adjust the posture of the multi-axis window device being calibrated so that the electric cross-scale of the multi-axis window device being calibrated coincides with the cross-scale alignment baseline generated by the target generation component;

[0111] Then, the illumination emitting element of the calibrated multi-optical axis window device is operated to simulate a certain window distance value and switched to a small beam divergence angle;

[0112] Next, the laser light source of the illumination transmitter in the multi-axis window device being calibrated is turned on. The generated laser passes through the parabolic reflector, secondary reflector and beam splitter in sequence, and finally forms a light spot at the focal plane of the long focal length collimator assembly.

[0113] Finally, the target surface scanning piece is moved so that the light spot coincides with the circular ring alignment baseline of the circular cross target, and the common axial consistency calibration result of the illumination transmitter and the illumination receiver corresponding to the current window distance value is obtained by calculating the movement amount on the target surface scanning piece.

[0114] The axial consistency calibration of the ranging component of the calibrated multi-axis window device includes the common axial consistency calibration of the ranging transmitter and the ranging receiver.

[0115] Furthermore, the specific process of calibrating the common axial consistency of the ranging transmitter and the ranging receiver is as follows:

[0116] First, adjust the test bench so that the distance measurement receiver is aligned with the long focal length collimation component, and the target generation component generates a cross to align with the baseline;

[0117] Next, the laser light source is turned on, and the ranging transmitter emits laser light, which is then projected onto the star point target through the neutral attenuation plate group and the fiber coupling mirror.

[0118] Finally, operate the calibrated multi-axis window device to perform distance measurement, and control the coupling scanning part of the fiber optic coupling assembly to move to the two edge critical points of the receiving field of view. At this time, the zero position of the fiber optic coupling assembly is the calibration result of the common axial consistency of the ranging transmitter and the ranging receiver.

[0119] Furthermore, the expression for calibrating the common axial consistency of the ranging transmitter and the ranging receiver is:

[0120]

[0121] Wherein, θ3 represents the calibration result of the common axial consistency of the ranging transmitter and the ranging receiver, d2 represents the movement of the laser center position of the ranging component from the zero position, x i Indicates an edge critical point of the receiving field of view when the coupled scanning piece moves in the x-axis direction, x j Indicates another edge critical point of the receiving field of view when the coupled scanning piece moves in the x-axis direction, y i Indicates an edge critical point of the receiving field of view when the coupled scanning piece moves in the y-axis direction, y j It indicates another edge critical point of the receiving field of view when the coupled scanning piece moves in the y-axis direction.

[0122] It should be noted that the axial consistency calibration system of the multi-axis window device can also perform common axial consistency calibration between the lighting component and the ranging component of the multi-axis window device, and the corresponding method can also be used to perform calibration calculations between its various transmitting components and between its various receiving components.

[0123] It should be noted that the axial consistency calibration system of multi-axis window devices covers visible light, near-infrared light, mid-band infrared light and long-wave infrared light. For multi-axis window devices equipped with sensors in other bands (such as infrared thermal imagers), corresponding axial consistency calibration can also be performed; in conjunction with a neutral attenuation plate set and an illuminance meter, corresponding axial consistency calibration can also be performed for multi-axis window devices equipped with low-light level night vision sensors.

[0124] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of this application, the meaning of "plurality" is two or more, unless otherwise clearly specified.

[0125] In the description of this specification, the reference terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification.

[0126] The above is only a specific implementation method of the present application, but the scope of protection of the present application is not limited thereto. Any technician familiar with this technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed in this application, and these modifications or replacements should be included in the scope of protection of the present application.

[0127] Those skilled in the art will readily appreciate other embodiments of the present invention after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present invention that follow the general principles of this application and include common knowledge or customary techniques in the art that are not disclosed herein.

Claims

1. An axial consistency calibration system for a multi-axis window device, characterized in that: The axial consistency calibration system includes: A target generation component, comprising a light source switching component, a circular cross target, a target panel, and a spectroscope. The light source switching component is used to provide illumination for the circular cross target. The target panel is provided with a target surface scanner, which is used to control and read the movement of the circular cross target. A test bench is provided with a calibrated multi-axis window device, the calibrated multi-axis window device comprising a lighting assembly and a distance measuring assembly arranged in parallel, the distance measuring assembly being located above the lighting assembly, and a neutral attenuation sheet set being provided on the test bench in front of the distance measuring assembly; the lighting assembly comprising an illumination transmitter and an illumination receiver, and the distance measuring assembly comprising a distance measuring transmitter and a distance measuring receiver; A fiber coupling assembly, the fiber coupling assembly comprising a fiber coupling mirror and a coupling scanning component connected to each other, wherein the coupling scanning component is provided with a star point target; A long focal length collimating assembly, the long focal length collimating assembly comprising a parabolic reflector and a secondary reflector; The laser light emitted by the ranging transmitter is attenuated by the neutral attenuation plate group, and then projected onto the star point target through the fiber coupling mirror, and then projected onto the beam splitter through the star point target; then projected onto the secondary reflector by the beam splitter, and reflected onto the parabolic reflector through the secondary reflector, and finally reflected to the ranging receiver through the parabolic reflector, thereby achieving calibration of the common axial consistency of the ranging transmitter and the ranging receiver; A control component is connected to the target generation component, the test bench and the optical fiber coupling component respectively.

2. The axial consistency calibration system for a multi-axis window device according to claim 1, characterized in that: The light source switching component includes an integrating sphere light source and a blackbody light source, and both the integrating sphere light source and the blackbody light source are connected to the control component; The integrating sphere light source is used to provide illumination from visible light to near-infrared light for the circular cross target, and is capable of detecting and responding to the near-infrared photodetector of the calibrated multi-axis device; The blackbody light source is used to provide infrared light band illumination for the circular cross target and is capable of detecting and responding to the infrared photoelectric detector of the calibrated multi-axis window device.

3. The axial consistency calibration system for a multi-axis window device according to claim 1, characterized in that: The substrate of the target panel is ZnS material.

4. The axial consistency calibration system for a multi-axis window device according to claim 1, characterized in that: The circular cross target and the star point target are both arranged on the focal plane of the long focal length collimating assembly; The circular cross target is used to provide a cross alignment baseline and a circular alignment baseline for the calibrated multi-axis window device.

5. The axial consistency calibration system for a multi-axis window device according to claim 1, characterized in that: The neutral attenuation sheet group is arranged on the test table in front of the ranging transmitter.

6. The axial consistency calibration system for a multi-axis window device according to claim 1, characterized in that: The control assembly includes a control component and a computer connected to each other, and the control component is respectively connected to the target generation component, the test bench and the optical fiber coupling component; The computer is used to display and adjust the information of the control component.

7. A method for calibrating the axial consistency of a multi-axis window device, characterized in that: The axial consistency calibration method is used to perform the operation process of the axial consistency calibration system according to any one of claims 1 to 6, and the axial consistency calibration method comprises the following steps: Calibrate the axial consistency of the illumination assembly of the calibrated multi-axis window device, including calibrating the axial consistency of the illumination emitting element, calibrating the axial consistency of the illumination receiving element, and calibrating the common axial consistency of the illumination emitting element and the illumination receiving element; The axial consistency calibration of the distance measuring component of the multi-axis window device to be calibrated includes the common axial consistency calibration of the distance measuring transmitting component and the distance measuring receiving component.

8. The axial consistency calibration method of a multi-axis window device according to claim 7, characterized in that: The step of calibrating the axial consistency of the lighting emitter includes: Operating the calibrated multi-axis window device to switch to a small beam divergence angle; Turn on the laser light source of the illumination emitting element in the multi-axis window device being calibrated. The generated laser light passes through the parabolic reflector, the secondary reflector, and the beam splitter in sequence, ultimately forming a light spot at the focal plane of the long-focal-length collimator assembly. The light spot is aligned with the circular alignment baseline of the circular cross target. Operating the calibrated multi-axis window device to simulate different window distance values, and obtaining a calibration result of the axial consistency of the illumination emitter by calculating the movement amount on the target surface scanning piece of the annular cross target; The step of calibrating the axial consistency of the illumination receiving element comprises: Controlling the target generating component to generate a cross alignment baseline, and sequentially passing through the beam splitter, the secondary reflector and the parabolic reflector to form an infinitely distant target to be received by the illumination receiving component; Controlling the test bench to adjust the posture of the calibrated multi-axis window device so that the electric cross-scale of the calibrated multi-axis window device coincides with the cross-scale alignment baseline generated by the target generation component; operating the calibrated multi-axis window device to simulate different window distance values, and obtaining an axial consistency calibration result of the illumination receiving element by calculating a movement amount of an electric cross-reticle of the calibrated multi-axis window device; The step of calibrating the common axial consistency of the illumination emitting element and the illumination receiving element comprises: Controlling the target generating assembly to generate a cross alignment baseline, and sequentially passing through a beam splitter, a secondary reflector, and a parabolic reflector to form an infinitely distant target to be received by the illumination receiving element; Controlling the test bench to adjust the posture of the calibrated multi-axis window device so that the electric cross-scale of the calibrated multi-axis window device coincides with the cross-scale alignment baseline generated by the target generation component; Operating the illumination emitting element of the calibrated multi-optical-axis window device to simulate a certain window distance value, and switching to a small beam divergence angle; Turning on the laser light source of the illumination emitting element in the calibrated multi-axis window device, the generated laser light passes through the parabolic reflector, the secondary reflector and the beam splitter in sequence, and finally forms a light spot at the focal plane position of the long focal length collimation component; Move the target surface scanning piece so that the light spot coincides with the circular alignment baseline of the circular cross target, and by calculating the movement amount on the target surface scanning piece, obtain the common axial consistency calibration result of the illumination emitting element and the illumination receiving element corresponding to the current window distance value.

9. The axial consistency calibration method of a multi-axis window device according to claim 8, characterized in that: The expression for calibrating the axial consistency of the lighting emitter is: Wherein, θ1 represents the calibration result of the axial consistency of the illumination emitter, d1 represents the movement of the circular cross target, and f1 represents the focal length of the long focal length collimator assembly; The expression for calibrating the axial consistency of the illumination receiving element is: Wherein, θ2 represents the calibration result of the axial consistency of the illumination receiving element, n represents the number of pixels of the movement of the detector cross-grain, D represents the pixel size, and f2 represents the focal length of the calibrated multi-axis window device.

10. The axial consistency calibration method of a multi-axis window device according to claim 7, characterized in that: The step of calibrating the common axial consistency of the ranging transmitter and the ranging receiver includes: Adjusting the test bench so that the distance measurement receiving component is aligned with the long focal length collimation component, and the target generating component generates a cross to align with the baseline; Turn on the laser light source, the ranging transmitter emits laser light, and the laser light is projected onto the star point target through the neutral attenuation plate group and the fiber coupling mirror in sequence; Operate the calibrated multi-axis window device to perform distance measurement, and control the coupling scanning component of the optical fiber coupling assembly to move to the two edge critical points of the receiving field of view. At this time, the zero position of the optical fiber coupling assembly is the calibration result of the common axial consistency of the ranging transmitter and the ranging receiver; The expression for calibrating the common axial consistency of the ranging transmitter and the ranging receiver is: Wherein, θ3 represents the calibration result of the common axial consistency of the ranging transmitter and the ranging receiver, d2 represents the movement of the laser center position of the ranging component from the zero position, x i Indicates an edge critical point of the receiving field of view when the coupled scanning piece moves in the x-axis direction, x j Indicates another edge critical point of the receiving field of view when the coupled scanning piece moves in the x-axis direction, y i Indicates an edge critical point of the receiving field of view when the coupled scanning piece moves in the y-axis direction, y j It indicates another edge critical point of the receiving field of view when the coupled scanning piece moves in the y-axis direction.

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