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

Abstract

The invention relates to an axial consistency calibration system and method for multi-optical-axis window-penetrating equipment, and belongs to the technical field of optical metrology and measurement. The calibration system comprises a target generation assembly, a test board, an optical fiber coupling assembly, a long-focus collimation assembly and a control assembly. The calibration method is used for executing the operation process of the calibration system. According to the calibration system and the calibration method provided by the invention, the measurement and calibration requirements of various multi-optical-axis window-penetrating devices can be met, and a guarantee is provided for axial consistency parameter testing of the multi-optical-axis window-penetrating devices.

Description

Technical Field

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

[0002] Traditional optoelectronic reconnaissance equipment mainly includes visible light equipment, infrared light equipment and low-light-level night vision equipment, etc. Among them, infrared light equipment will be completely ineffective because infrared light cannot pass through glass; visible light equipment and low-light-level night vision equipment will produce strong reflection when the external ambient light hits the window surface due to the reflection effect of the glass surface or strong reflective medium, which seriously affects the detection efficiency of visible light equipment and low-light-level night vision equipment, causing the observer or image acquisition equipment to be unable to clearly collect the image information of people and objects in the window, and therefore, it is impossible to conduct effective through-window detection.

[0003] The multi-axis window-through device is a new type of photoelectric detection device. Its main application scenario is to detect and identify targets and environmental information such as those inside houses and cars 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. Its principle is to use a laser to emit a laser to illuminate the target in the window. Since the emitted laser has the characteristics of strong directionality and concentrated energy, it can enhance the laser signal reflected back by the target in the window. 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 of the multi-axis window-through device has the following problems:

[0004] First, most of the existing multi-axis window devices use the laser axis or the laser emission axis of the device to be measured 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 emission component of the multi-axis window device, as well as the common axial consistency of the emission component and the receiving component.

[0005] Secondly, many of the 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, while the existing axial consistency calibration or detection systems cannot meet the evaluation and calibration 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 the present application, and therefore may include information that does not constitute the prior art known to ordinary technicians in the 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, the target generation component includes a light source switching component, a circular cross target, a target panel and a spectroscope, the light source switching component is used to provide lighting for the circular cross target, the target panel is provided with a target surface scanning component, and the target surface scanning component is used to control and read the movement amount of the circular cross target;

[0010] A test bench, wherein a calibrated multi-axis window device is arranged on the test bench, wherein the calibrated multi-axis window device comprises a lighting component and a distance measuring component arranged in parallel, wherein the distance measuring component is located above the lighting component, and a neutral attenuation sheet group is arranged on the test bench in front of the distance measuring component; the lighting component comprises a lighting transmitting element and a lighting receiving element, and the distance measuring component comprises a distance measuring transmitting element and a distance measuring receiving element;

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

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

[0013] The laser emitted by the ranging transmitter is attenuated by the neutral attenuation sheet 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, so as to realize the calibration of the common axial consistency of the ranging transmitter and the ranging receiver;

[0014] A control component is connected to the target generating 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 black body light source, and both the integrating sphere light source and the black body 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-optical axis device;

[0017] The blackbody light source is used to provide infrared light band illumination for the circular cross target, and can detect and respond 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 a ZnS material.

[0019] In an exemplary embodiment of the present application, the circular cross target and the star point target are both arranged on the focal plane of the long focal length collimation 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, and 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 element.

[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, and the axial consistency calibration method comprises the following steps:

[0025] Calibrate the axial consistency of the illumination assembly of the calibrated multi-optical 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 calibrated multi-axis window device includes the common axial consistency calibration of the distance measuring transmitting element and the distance measuring receiving element.

[0027] In an exemplary embodiment of the present application, the step of calibrating the axial consistency of the illumination emitting element 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 calibrated multi-axis window device, and the generated laser 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, and makes the light spot coincide with the circular alignment baseline of the circular cross target;

[0030] The calibrated multi-axis window device is operated to simulate different window distance values, and the movement amount on the target surface scanning part of the circular cross target is calculated to obtain the calibration result of the axial consistency of the illumination emission part;

[0031] The step of calibrating the axial consistency of the illumination receiving member 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 alignment baseline generated by the target generation component;

[0034] Operating the calibrated multi-axis window device to simulate different window distance values, and obtaining the 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] Control the target generating assembly to generate a cross alignment baseline, and sequentially pass through a beam splitter, a secondary reflector and a parabolic reflector to form an infinitely distant target to be received by the illumination receiving component;

[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 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 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 collimating component;

[0040] The target surface scanning piece is moved to make the light spot coincide with the circular ring alignment baseline of the circular cross target, and the common axial consistency calibration result of the illumination emitting element and the illumination receiving element at the current window distance value is obtained by calculating the movement amount on the target surface scanning piece.

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

[0042]

[0043] Among them, θ 1 The calibration result representing the axial consistency of the illumination emitter, d 1 represents the movement of the circular cross target, f 1 Indicates the focal length of the long focal length collimator assembly;

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

[0045]

[0046] Among them, θ 2 It indicates the calibration result of the axial consistency of the illumination receiving element, n indicates the number of pixels of the detector cross-section movement, D indicates the pixel size, and f 2 Indicates 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] Adjust 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 distance measuring transmitting element emits laser light, and the laser light is projected onto the star point target through the neutral attenuation plate group and the optical fiber coupling mirror in sequence;

[0050] Operate the calibrated multi-axis window device to measure distance, and control the coupling scanning component of the optical fiber coupling component to move to two edge critical points of the receiving field of view. At this time, the zero position of the optical fiber coupling component 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] Among them, θ 3The calibration result of the common axial consistency of the ranging transmitter and the ranging receiver, d 2 Indicates the movement of the laser center position of the distance measuring component from the zero position. x i It represents a critical edge point of the receiving field of view when the coupled scanning piece moves in the x-axis direction. 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 It indicates an edge critical point of the receiving field of view when the coupled scanning piece moves in the y-axis direction. 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] The present application proposes an axial consistency calibration system and method for a multi-optical 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 calibrated multi-axis window device, 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;

[0057] (2) The present application configures the light source switching element to include an integrating sphere light source and a black body light source, so that the spectral range of the calibrated multi-axis window device covers the visible light band, the near infrared light band, the mid-wave infrared light band and the long-wave infrared light band;

[0058] (3) The present application not only meets the requirements of coded laser recognition and reception by designing a fiber coupling component, but also uses the fiber length distance to replace the actual spatial distance of the distance measurement, so that the actual spatial distance is greater than the blind spot distance. By controlling the coupling scanning component in the fiber coupling component 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 drawings herein are incorporated into the specification 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 for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0060] Figure 1 A schematic diagram showing the structure 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 3 A 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, black body light source; 112, circular cross target; 113, target panel; 1131, target surface scanning component; 114, spectroscope; 120, test bench; 121, calibrated multi-axis window device; 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 coupling component; 131, fiber coupling mirror; 132, coupling scanning element; 1321, star point 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 implemented in a variety of forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this application will be more comprehensive and complete and 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 only schematic illustrations of the present application and are not necessarily drawn to scale. The same reference numerals in the figures represent the same or similar parts, and thus their repeated description will be omitted. Some of the block diagrams shown in the accompanying drawings are functional entities and do not necessarily correspond to physically or logically independent entities. These functional entities can be implemented in software form, or implemented in one or more hardware modules or integrated circuits, or implemented 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-optical axis window device. Figure 1 As shown, the axial consistency calibration system 100 includes:

[0067] The target generating component 110 includes a light source switching component 111, a circular cross target 112, a target panel 113 and a spectroscope 114. The light source switching component 111 is used to provide lighting for the circular cross target 112. The target panel 113 is provided with a target surface scanning component 1131. The target surface scanning component 1131 is used to control and read the movement amount of the circular cross target 112.

[0068] A test bench 120, on which a calibrated multi-optical axis window device 121 is disposed, the calibrated multi-optical axis window device 121 includes a lighting component 1211 and a distance measuring component 1212 which are arranged in parallel, the distance measuring component 1212 is located above the lighting component 1211, and a neutral attenuation sheet group 122 is disposed on the test bench 120 in front of the distance measuring component 1212; the lighting component 1211 includes a lighting transmitting element 1211a and a lighting receiving element 1211b, and the distance measuring component 1212 includes a distance measuring transmitting element 1212a and a distance measuring receiving element 1212b;

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

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

[0071] The laser emitted by the ranging transmitter 1212a is attenuated by the neutral attenuation sheet group 122, and then projected onto the star point target 1321 through the fiber coupling mirror 131, and then projected onto the beam splitter 114 through the star point target 1321; then projected onto the secondary reflector 141 by the beam splitter 114, and reflected onto the parabolic reflector 142 through the secondary reflector 141, and finally reflected to the ranging receiver 1212b through the parabolic reflector 142, so as to realize the calibration of 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] The first aspect of the 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) The present 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 the receiver of various types of multi-axis window devices;

[0075] (2) The present application configures the light source switching element 111 to include an integrating sphere light source 1111 and a black body light source 1112, so that the spectral range of the calibrated multi-axis window device 121 covers the visible light band, the near infrared light band, the mid-wave infrared light band and the long-wave infrared light band;

[0076] (3) The present application not only meets the requirements for the recognition and reception of the coded laser by designing the optical fiber coupling component 130, but also uses the optical fiber length distance to replace the actual spatial distance of the distance measurement, so that the actual spatial distance is greater than the blind area distance. By controlling the coupling scanning component 132 in the optical fiber coupling component 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 example embodiment will be described in more detail.

[0078] A first aspect of the present 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 black body light source 1112, and the integrating sphere light source 1111 and the black body light source 1112 are respectively connected to the control component 150. The integrating sphere light source 1111 is used to provide illumination of the visible light to near-infrared light band for the circular cross target 112, and can detect and respond to the near-infrared photodetector of the calibrated multi-axis window device 121. The black body light source 1112 is used to provide illumination of the infrared light band for the circular cross target 112, and can detect and respond 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-band infrared light.

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

[0083] In the embodiment of the present application, the emission axis of the calibrated multi-axis window device 121 is analyzed by utilizing 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 1212a.

[0086] In one embodiment, the fiber coupling mirror 131 is used to guide the laser emitted by the ranging component 1212 into the long focal length collimation component 140 through the optical fiber, and project it onto the star point target 1321, so as to meet the recognition and reception requirements of the coded laser, and the use of the optical fiber length distance can replace the actual spatial distance of the ranging, so that the actual spatial distance is greater than the blind spot distance. By controlling the coupling scanning component 132 in the optical fiber coupling component 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.

[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 receiving element 1212b and the ranging transmitting element 1212a.

[0088] Furthermore, the target surface scanning element 1131 is used to control and read the movement amount 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 to the target generating component 110 without distortion.

[0090] Furthermore, the test bench 120 of the present 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 illumination transmitter 1211a, the axial consistency of the illumination receiver 1211b, and the common axial consistency of the illumination transmitter 1211a and the illumination receiver 1211b.

[0092] In one embodiment, the control component 150 includes a control element 151 and a computer 152 connected to each other. The control element 151 is respectively connected to the target generation component 110, the test bench 120 and the optical fiber coupling component 130. The computer 152 is used to display and adjust the information of the control element 151.

[0093] In a second aspect, this embodiment provides a method for calibrating the axial consistency of a multi-optical 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 illumination 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 to be calibrated is turned on, and the generated laser 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, and the light spot is made to coincide with the circular alignment baseline of the circular cross target;

[0097] Finally, the calibrated multi-axis window device is operated to simulate different window distance values, and the axial consistency calibration result of the illumination 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 illumination emitter is:

[0099]

[0100] Among them, θ 1 The calibration result representing the axial consistency of the illumination emitter, d 1 represents the movement of the circular cross target, f 1 Indicates the focal length of the long focal length collimator assembly.

[0101] The procedure for calibrating the axial alignment 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, the secondary reflector and the parabolic reflector in sequence to form an infinitely far target to be received by the illumination receiving element;

[0103] Then, the test bench is controlled 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 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] Among them, θ 2 It indicates the calibration result of the axial consistency of the illumination receiving element, n indicates the number of pixels of the detector cross-section movement, D indicates the pixel size, and f 2 Indicates 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, the secondary reflector and the parabolic reflector in sequence to form an infinitely far target to be received by the illumination receiving element;

[0110] Next, the test bench is controlled 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 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 calibrated multi-axis window device is turned on, and the generated laser 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;

[0113] Finally, the target surface scanning piece is moved to make the light spot coincide 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 distance measuring component of the calibrated multi-axis window device includes the common axial consistency calibration of the distance measuring transmitting component and the distance measuring receiving component.

[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 receiving component is aligned with the long focal length collimation component, and the target generating 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 in turn;

[0118] Finally, operate the calibrated multi-axis window device to measure distance, and control the coupling scanning component of the 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 fiber 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] Among them, θ 3 The calibration result of the common axial consistency of the ranging transmitter and the ranging receiver, d 2 Indicates the movement of the laser center position of the distance measuring component from the zero position. x i It represents a critical edge point of the receiving field of view when the coupled scanning piece moves in the x-axis direction. 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 It indicates an edge critical point of the receiving field of view when the coupled scanning piece moves in the y-axis direction. 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 corresponding methods 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 the multi-axis window device covers visible light, near-infrared light, mid-band infrared light and long-wave infrared light. For multi-axis window devices equipped with other band sensors (such as infrared thermal imagers), corresponding axial consistency calibration can also be performed; in conjunction with the neutral attenuation plate set and illuminance meter, corresponding axial consistency calibration can also be performed for multi-axis window devices equipped with low-light 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 technical features indicated. Thus, 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 the present application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0125] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" etc. means 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 representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification.

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

[0127] Those skilled in the art will readily appreciate other embodiments of the present application after considering the specification and practicing the invention disclosed herein. The present application is intended to cover any modification, use or adaptation of the present application, which follows the general principles of the present application and includes common knowledge or customary technical means in the art that are not disclosed in the present application.

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, the target generation component includes a light source switching component, a circular cross target, a target panel and a spectroscope, the light source switching component is used to provide lighting for the circular cross target, the target panel is provided with a target surface scanning component, and the target surface scanning component is used to control and read the movement amount of the circular cross target; A test bench, wherein the test bench is provided with a calibrated multi-axis window device, wherein the calibrated multi-axis window device comprises a lighting component and a distance measuring component arranged in parallel, wherein the distance measuring component is located above the lighting component, and a neutral attenuation sheet group is arranged on the test bench in front of the distance measuring component; the lighting component comprises a lighting transmitting element and a lighting receiving element, and the distance measuring component comprises a distance measuring transmitting element and a distance measuring receiving element; A fiber coupling assembly, the fiber coupling assembly comprising a fiber coupling mirror and a coupling scanning component connected to each other, and a star point target is arranged on the coupling scanning component; A long focal length collimating assembly, the long focal length collimating assembly comprising a parabolic reflector and a secondary reflector; The laser emitted by the ranging transmitter is attenuated by the neutral attenuation sheet 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, so as to realize the calibration of the common axial consistency of the ranging transmitter and the ranging receiver; A control component is connected to the target generating component, the test bench and the optical fiber coupling component respectively.

2. The axial consistency calibration system for a multi-optical axis window device according to claim 1, characterized in that: The light source switching component includes an integrating sphere light source and a black body light source, and both the integrating sphere light source and the black body 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-optical axis device; The blackbody light source is used to provide infrared light band illumination for the circular cross target, and can detect and respond to the infrared photoelectric detector of the calibrated multi-axis window device.

3. The axial consistency calibration system of the multi-optical 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-optical 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 collimation 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-optical 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-optical axis window device according to claim 1, characterized in that: The control component comprises a control element and a computer connected to each other, wherein the control element 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 element.

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-optical 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 calibrated multi-axis window device includes the common axial consistency calibration of the distance measuring transmitting element and the distance measuring receiving element.

8. The axial consistency calibration method of the multi-optical axis window device according to claim 7, characterized in that: The step of calibrating the axial consistency of the illumination emitting element comprises: 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 calibrated multi-axis window device, and the generated laser 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, and makes the light spot coincide with the circular alignment baseline of the circular cross target; The calibrated multi-axis window device is operated to simulate different window distance values, and the movement amount on the target surface scanning part of the circular cross target is calculated to obtain the calibration result of the axial consistency of the illumination emission part; The step of calibrating the axial consistency of the illumination receiving member 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 alignment baseline generated by the target generation component; Operating the calibrated multi-axis window device to simulate different window distance values, and obtaining the 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; The step of calibrating the common axial consistency of the illumination emitting element and the illumination receiving element comprises: Control the target generating assembly to generate a cross alignment baseline, and sequentially pass through a beam splitter, a secondary reflector and a 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 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 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 collimating component; The target surface scanning piece is moved to make the light spot coincide with the circular ring alignment baseline of the circular cross target, and the common axial consistency calibration result of the illumination emitting element and the illumination receiving element corresponding to the current window distance value is obtained by calculating the movement amount on the target surface scanning piece.

9. The axial consistency calibration method of the multi-optical axis window device according to claim 8, characterized in that: The expression for calibrating the axial consistency of the illumination 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 collimation component; The expression for calibrating the axial consistency of the illumination receiving member 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 amount of the cross scale of the detector, 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 the multi-optical 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 comprises: Adjust 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 distance measuring transmitting element emits laser light, and the laser light is projected onto the star point target through the neutral attenuation plate group and the optical fiber coupling mirror in sequence; Operate the calibrated multi-axis window device to measure distance, and control the coupling scanning component of the optical fiber coupling component to move to two edge critical points of the receiving field of view. At this time, the zero position of the optical fiber coupling component 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 It represents a critical edge point of the receiving field of view when the coupled scanning piece moves in the x-axis direction. 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 It indicates an edge critical point of the receiving field of view when the coupled scanning piece moves in the y-axis direction. 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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