CN117433640A - Infrared detector with multi-degree-of-freedom image motion compensation function and aviation camera - Google Patents

Abstract

The invention provides an infrared detector with a multi-degree-of-freedom image motion compensation function and an aviation camera, wherein the infrared detector comprises: four infrared photosensitive areas divided into a plurality of infrared array CCD detectors in a 'field' shape in advance, wherein each area is provided with a preset number of photosensitive groups with different image shift rates in parallel or side by side; the four charge rate control modules are respectively arranged in the four infrared photosensitive areas and are used for driving charges in the infrared photosensitive areas to transfer along a preset direction so as to perform image motion compensation; the four refrigerating modules are respectively arranged in the four infrared photosensitive areas and are used for controlling the working temperature of the infrared photosensitive areas; and the four charge output modules are respectively and electrically connected with the four refrigeration modules and are used for outputting the charges after image motion compensation in each infrared photosensitive area. The invention can carry out multi-degree-of-freedom image motion compensation on the premise of not increasing and moving hardware, reduces the quality, volume, power consumption and cost of an imaging system and has high imaging quality.

Description

Infrared detector with multi-degree-of-freedom image motion compensation function and aviation camera

Technical Field

The invention relates to the technical field of aerospace, in particular to an infrared detector with a multi-degree-of-freedom image motion compensation function and an aerospace camera.

Background

During the imaging process of the aerial camera, the reconnaissance plane (onboard plane) can be adjusted according to tactical requirements, such as: pitch, yaw, roll, compound motions, and the like. The attitude adjustment and the compound motion change of the carrier can enable an imaging system of an aviation camera on the carrier to generate image shift on an image plane, so that the imaging performance of an optical system is reduced, and even image blurring can be caused when the imaging performance is serious, so that the imaging system cannot be used. Corresponding to different flight attitudes and composite motion states, as shown in fig. 1 (a), the images can leave different image movement tracks on the image plane of the aerial camera detector, as shown in fig. 1 (b), the length of the vector represents the motion amplitude of the image, the direction of the arrow represents the direction of the image motion, and the amplitude and the direction are different for different parts of the array. The image shift with different sizes and directions on the image surface of the detector under different flight attitudes and compound motion states of the carrier is called multi-degree-of-freedom image shift.

The image motion compensation method developed at present mainly takes three angles as follows: firstly, a CCD device with a time delay integration (Time Delay and Integration, TDI) function or an area array CCD is developed by adopting an electronic means, and the charge transfer speed of the CCD in the integration time is controlled by adopting a charge transfer driving technology aiming at a specific CCD device, so that image motion compensation can be carried out; secondly, researching an image processing algorithm, and realizing the definition of a blurred image or correcting image rotation through later image processing, wherein image information is lost; and thirdly, adopting a motion control technology, and compensating image shift caused by motion imaging by controlling exposure time, an inertial stabilization platform, a conversion lens, a quick reflector and the like. This approach requires improvements in mechanical structure and requires very high structural accuracy, reliability, stability, complexity, weight control, cost control.

However, in the above manner, the electronic image motion compensation method reported at present mainly uses TDICCD to perform forward image motion compensation and stepwise block compensation for aviation different-speed image motion, but does not provide a good solution for the motions of the aviation camera with multiple degrees of freedom of roll, pitch, yaw and above combination, and severely restricts the development of image motion compensation technology and high-end CCDs (support of the motion CCD with multiple degrees of freedom of roll, pitch, yaw and combination). The image type image motion compensation method is a post-compensation method and does not have real-time property. The motion control technology compensation method needs to add mechanical and optical compensation systems, but the mechanical and optical compensation systems can greatly increase the weight and volume of the aerial camera.

Disclosure of Invention

Based on the above, the invention provides an infrared detector and an aviation camera with a multi-degree-of-freedom image motion compensation function, so as to solve or partially solve the problems in the prior art. The infrared detector and the aerial camera with the multi-degree-of-freedom image motion compensation function can perform on-chip compensation of roll, pitch, yaw and compound multi-degree-of-freedom dynamic motion on the premise of not increasing and moving hardware, and can reduce the quality, volume, power consumption and cost of an imaging system.

In a first aspect, the present invention provides an infrared detector with multiple degrees of freedom image motion compensation function, including:

the infrared array CCD detector comprises four infrared photosensitive areas which are divided into a 'field' -shaped form in advance, wherein each infrared photosensitive area comprises a preset number of photosensitive groups with different image shift rates, which are arranged in parallel or side by side;

the four charge rate control modules are respectively arranged in the four infrared photosensitive areas, each charge rate control module is respectively and electrically connected with one infrared photosensitive area and is used for driving charges in the infrared photosensitive areas to transfer along a preset direction so as to perform image motion compensation;

the four refrigeration modules are respectively arranged in the four infrared photosensitive areas, and each refrigeration module is respectively and electrically connected with one infrared photosensitive area and is used for controlling the working temperature of the infrared photosensitive area;

and the four charge output modules are respectively and electrically connected with the four refrigeration modules, and each charge output module is respectively and electrically connected with one refrigeration module and is used for outputting charges after image motion compensation in each infrared photosensitive area.

Preferably, the four infrared photosensitive areas include a first infrared photosensitive module, a second infrared photosensitive module, a third infrared photosensitive module and a fourth infrared photosensitive module, the first infrared photosensitive module is perpendicular to the second infrared photosensitive module, the second infrared photosensitive module is perpendicular to the third infrared photosensitive module, the third infrared photosensitive module is perpendicular to the fourth infrared photosensitive module, the fourth infrared photosensitive module is perpendicular to the first infrared photosensitive module, the first infrared photosensitive module includes four first photosensitive groups with different image shift rates, the second infrared photosensitive module includes four second photosensitive groups with different image shift rates, the third infrared photosensitive module includes four third photosensitive groups with different image shift rates, and the fourth infrared photosensitive module includes four fourth photosensitive groups with different image shift rates.

Preferably, the four charge rate control modules include:

the first charge rate control module is electrically connected with the first infrared photosensitive module and is used for driving first charges in the first infrared photosensitive module to transfer charges along a first preset direction;

the second charge rate control module is electrically connected with the second infrared photosensitive module and is used for driving second charges in the second infrared photosensitive module to transfer charges along a second preset direction;

the third charge rate control module is electrically connected with the third infrared photosensitive module and is used for driving third charges in the third infrared photosensitive module to transfer charges along a third preset direction;

and the fourth charge rate control module is electrically connected with the fourth infrared photosensitive module and is used for driving fourth charges in the fourth infrared photosensitive module to transfer charges along a fourth preset direction.

Preferably, the first charge rate control module includes first charge rate control units electrically connected to each of the first photosensitive groups, each of the first charge rate control units being configured to drive first charges in the corresponding first photosensitive group to perform charge transfer along a first preset direction at a first preset transfer rate, and the first preset transfer rates corresponding to each of the first photosensitive groups being different;

The second charge rate control module comprises second charge rate control units which are respectively and electrically connected with each second photosensitive group, each second charge rate control unit is used for driving second charges in the corresponding second photosensitive group to carry out charge transfer along a second preset direction at a second preset transfer rate, and the second preset transfer rates corresponding to each second photosensitive group are different;

the third charge rate control module comprises third charge rate control units which are respectively and electrically connected with each third photosensitive group, each third charge rate control unit is used for driving third charges in the corresponding third photosensitive group to carry out charge transfer along a third preset direction at a third preset transfer rate, and the third preset transfer rates corresponding to each third photosensitive group are different;

the fourth charge rate control module comprises fourth charge rate control units which are respectively and electrically connected with each fourth photosensitive group, each fourth charge rate control unit is used for driving fourth charges in the corresponding fourth photosensitive group to carry out charge transfer along a fourth preset direction at a fourth preset transfer rate, and the fourth preset transfer rates corresponding to each fourth photosensitive group are different.

Preferably, the four refrigeration modules include:

The first refrigerating module is electrically connected with the first infrared photosensitive module and is used for controlling the working temperature of the first infrared photosensitive module;

the second refrigerating module is electrically connected with the second infrared photosensitive module and is used for controlling the working temperature of the second infrared photosensitive module;

the third refrigerating module is electrically connected with the third infrared photosensitive module and is used for controlling the working temperature of the third infrared photosensitive module;

and the fourth refrigerating module is electrically connected with the fourth infrared photosensitive module and is used for controlling the working temperature of the fourth infrared photosensitive module.

Preferably, the first refrigeration module comprises first refrigeration units electrically connected with each first photosensitive group respectively, and each first refrigeration unit is used for controlling the working temperature of the corresponding first photosensitive group;

the second refrigerating module comprises second refrigerating units which are respectively and electrically connected with each second photosensitive group, and each second refrigerating unit is used for controlling the working temperature of the corresponding second photosensitive group;

the third refrigerating module comprises third refrigerating units which are respectively and electrically connected with each third photosensitive group, and each third refrigerating unit is used for controlling the working temperature of the corresponding third photosensitive group;

the fourth refrigerating module comprises fourth refrigerating units which are respectively and electrically connected with each fourth photosensitive group, and each fourth refrigerating unit is used for controlling the working temperature of the corresponding fourth photosensitive group.

Preferably, the four charge output modules include:

the first charge output module is electrically connected with the first refrigeration module and is used for outputting charges subjected to image motion compensation in the first infrared photosensitive module;

the second charge output module is electrically connected with the second refrigeration module and is used for outputting the charge subjected to image motion compensation in the second infrared photosensitive module;

the third charge output module is electrically connected with the third refrigerating module and is used for outputting charges subjected to image motion compensation in the third infrared photosensitive module;

and the fourth charge output module is electrically connected with the fourth refrigeration module and is used for outputting the charge subjected to image motion compensation in the fourth infrared photosensitive module.

Preferably, the first charge output module includes first charge output units electrically connected to each of the first refrigeration units, and each of the first charge output units is configured to output the charge after image motion compensation in the corresponding first photosensitive group;

the second charge output module comprises second charge output units which are respectively and electrically connected with each second refrigerating unit, and each second charge output unit is used for outputting the charge subjected to image motion compensation in the corresponding second photosensitive group;

The third charge output module comprises third charge output units which are respectively and electrically connected with each third refrigeration unit, and each third charge output unit is used for outputting the charge subjected to image motion compensation in the corresponding third photosensitive group;

the fourth charge output module comprises fourth charge output units which are respectively and electrically connected with each fourth refrigerating unit, and each fourth charge output unit is used for outputting the charge subjected to image motion compensation in the corresponding fourth photosensitive group.

Preferably, the infrared array CCD detector comprises 4096×4096 pixels, and each infrared photosensitive region comprises 2048×2048 pixels.

In a second aspect, the present invention also provides an aerial camera supporting an image motion compensation function with multiple degrees of freedom, including: the infrared detector comprises an infrared detector lens, a time sequence pulse generator, an infrared detector front end signal processing module, an infrared detector interface module, an infrared detector driving module and any one of the infrared detectors with the multi-degree-of-freedom image motion compensation function; the infrared detector is respectively connected with the infrared detector lens, the infrared detector front end signal processing module and the infrared detector driving module, the infrared detector driving module is connected with the time sequence pulse generator, and the infrared detector front end signal processing module is connected with the infrared detector interface module;

The infrared detector lens is used for collecting reflected light of a target scenery and focusing the reflected light on the infrared detector;

the infrared detector is used for converting the optical signal into an electric signal and performing multi-degree-of-freedom image motion compensation;

the time sequence pulse generator is used for generating time sequence signals required by the system;

the infrared detector driving module is used for amplifying the time sequence signal generated by the time sequence pulse generator into a driving level signal with enough voltage and current driving capability and generating direct current bias voltage required by the infrared detector;

the infrared detector front-end signal processing module is used for performing front-end processing on signals generated by the infrared detector;

the infrared detector interface module is used for outputting the digital signals after analog-to-digital conversion.

The infrared detector and the aviation camera with the multi-degree-of-freedom image motion compensation function have the following beneficial effects compared with the prior art:

the invention relates to an infrared detector with a multi-degree-of-freedom image motion compensation function and an aviation camera, which comprise the following components: the infrared array CCD detector comprises four infrared photosensitive areas which are divided into a 'field' -shaped form in advance, wherein each infrared photosensitive area comprises a preset number of photosensitive groups with different image shift rates, which are arranged in parallel or side by side; the four charge rate control modules are respectively arranged in the four infrared photosensitive areas, each charge rate control module is respectively and electrically connected with one infrared photosensitive area and is used for driving charges in the infrared photosensitive areas to transfer along a preset direction so as to perform image motion compensation; the four refrigeration modules are respectively arranged in the four infrared photosensitive areas, and each refrigeration module is respectively and electrically connected with one infrared photosensitive area and is used for controlling the working temperature of the infrared photosensitive area; and the four charge output modules are respectively and electrically connected with the four refrigeration modules, and each charge output module is respectively and electrically connected with one refrigeration module and is used for outputting charges after image motion compensation in each infrared photosensitive area. According to the infrared detector with the multi-degree-of-freedom image motion compensation function, on-chip compensation of rolling, pitching, yawing and compound multi-degree-of-freedom dynamic motion can be performed by only one infrared array CCD detector on the premise of not increasing and moving hardware, the quality, the volume, the power consumption and the cost of an imaging system are reduced, the working temperature of an infrared photosensitive area can be controlled by a refrigerating module to improve the imaging effect, the interference of the external temperature is avoided, and the infrared photosensitive area is divided into a plurality of photosensitive groups with different image motion rates, so that the imaging effect is further improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It is evident that the drawings in the following description are only some embodiments of the present invention and that other drawings may be obtained from these drawings without inventive effort for a person of ordinary skill in the art.

FIG. 1 is a schematic diagram of the principle of motion image shift of an aerial camera with multiple degrees of freedom and a schematic diagram of image shift on a target surface;

FIG. 2 is a schematic diagram of a system frame of an infrared detector with multiple degrees of freedom image motion compensation according to an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of an infrared detector with multiple degrees of freedom image motion compensation according to an embodiment of the present invention;

FIG. 4 is a schematic diagram of the image motion compensation principle;

fig. 5 is a schematic structural diagram of an aerial camera supporting multiple degrees of freedom image motion compensation according to an embodiment of the present invention.

Detailed Description

In order to facilitate an understanding of the present application, a more complete description of the present application will now be provided with reference to the relevant figures. Preferred embodiments of the present application are shown in the accompanying drawings. This application may, however, be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

The reason for generating the image shift of the aviation multiple degrees of freedom is as follows:

in the reconnaissance process, a reconnaissance aircraft is required to fly at a high speed and a low altitude for avoiding the surveillance of an enemy radar. The low-altitude high-speed flight greatly improves the battlefield survivability and the depth reconnaissance monitoring capability of the aircraft, but at the moment, severe image shift occurs on the target surface of aerial imaging, so that aerial imaging is blurred, the existence of the image shift greatly influences the imaging quality of a camera, and the resolution of aerial images is obviously reduced. When the image shift exists, the contour of the shot target is unclear, a larger or smaller transition area exists between the target and the surrounding background, the transition area expands along with the increase of the image shift, and when the transition area reaches a certain degree, the imaging of two adjacent targets is overlapped with each other and cannot be distinguished. Besides forward flight, the flight attitude of the reconnaissance aircraft can be adjusted according to technical requirements, such as: pitch, yaw and roll, and compound multiple degree of freedom motions, as shown in fig. 1 a. Corresponding to different flight attitudes, the image will leave different image shift tracks on the target surface, as shown in fig. 1B.

Fig. 2 illustrates an embodiment of an infrared detector with multiple degrees of freedom image motion compensation according to the present invention. As shown in fig. 2 and 3, the infrared detector with the multi-degree-of-freedom image motion compensation function includes:

the infrared array CCD detector 1 comprises four infrared photosensitive areas which are divided into a plurality of 'field' -shaped areas in advance, and each infrared photosensitive area comprises a preset number of photosensitive groups with different image shift rates, which are arranged in parallel or side by side.

And the four charge rate control modules 2 are respectively arranged in the four infrared photosensitive areas, and each charge rate control module is respectively and electrically connected with one infrared photosensitive area and is used for driving the charges in the infrared photosensitive areas to transfer along a preset direction so as to perform image motion compensation.

And four refrigeration modules 3 respectively arranged in the four infrared photosensitive areas, wherein each refrigeration module is respectively and electrically connected with one infrared photosensitive area and is used for controlling the working temperature of the infrared photosensitive area.

And the four charge output modules 4 are respectively and electrically connected with the four refrigeration modules 3, and each charge output module is respectively and electrically connected with one refrigeration module and is used for outputting charges subjected to image motion compensation in each infrared photosensitive area.

Specifically, the four infrared photosensitive areas in the infrared array CCD detector 1 are arranged vertically and orthogonally to each other, so that charges in the four infrared photosensitive areas in the infrared array CCD detector 1 can be transferred in different directions, thereby being capable of covering a plurality of image shifts with different degrees of freedom.

It should be noted that, the working principle of the infrared detector with the multi-degree-of-freedom image motion compensation function in the embodiment of the invention is as follows: the imaging area of the infrared array CCD detector 1 is composed of two-dimensionally arranged photosensitive groups, all of which are divided into a plurality of groups by columns or arrangement, each group being composed of a plurality of columns of photosensitive groups. In this embodiment, assuming that the infrared array CCD detector 1 is divided into N photosensitive groups, such as C1-Cn in fig. 4, when imaging a target scene, the imaged image is moved in the imaging area in the direction shown in fig. 4, if the imaged charge is driven by the charge rate control unit to move synchronously with the image shift, the effect of the image shift can be eliminated, if the image shift rates of different groups are different, the imaged charge can be driven by the charge rate control unit of different groups to be transferred at different transfer rates, and the transfer rate of the imaged charge of the same group is synchronous with the image shift rate of the group, so as to eliminate the effect of the image shift. Each infrared array CCD detector 1 can compensate for image shift in one direction, that is, one degree of freedom image shift compensation is realized, and when a preset number of orthogonal detector modules are arranged, the image shift of the same object scene in multiple degrees of freedom is compensated. The more groups are divided, the better the image motion compensation effect is.

Further, as shown in fig. 3, the four infrared photosensitive areas include a first infrared photosensitive module 11, a second infrared photosensitive module 12, a third infrared photosensitive module 13 and a fourth infrared photosensitive module 14, the first infrared photosensitive module 11 is perpendicular to the second infrared photosensitive module 12, the second infrared photosensitive module 12 is perpendicular to the third infrared photosensitive module 13, the third infrared photosensitive module 13 is perpendicular to the fourth infrared photosensitive module 14, the fourth infrared photosensitive module 14 is perpendicular to the first infrared photosensitive module 11, the first infrared photosensitive module 11 includes four first photosensitive groups 111 with different image shift rates, the second infrared photosensitive module 12 includes four second photosensitive groups 121 with different image shift rates, the third infrared photosensitive module 13 includes four third photosensitive groups 131 with different image shift rates, and the fourth infrared photosensitive module 14 includes four fourth photosensitive groups 141 with different image shift rates.

Specifically, in this embodiment, each infrared photosensitive area is divided into four photosensitive groups with different image shift rates, and image shift compensation is performed by using the photosensitive groups with different image shift rates, so that the imaging device can adapt to application situations with different image shift rates, and further the final imaging effect is better.

Further, as shown in fig. 3, the four charge rate control modules 2 include:

the first charge rate control module 21, electrically connected to the first infrared photosensitive module 11, is configured to drive the first charges in the first infrared photosensitive module 11 to perform charge transfer along a first preset direction, as shown in fig. 5. Wherein the first preset direction is an upward direction.

The second charge rate control module 22, electrically connected to the second infrared photosensitive module 12, is configured to drive the second charges in the second infrared photosensitive module 12 to perform charge transfer along a second preset direction, as shown in fig. 5. Wherein the second preset direction is a rightward direction.

The third charge rate control module 23, electrically connected to the third infrared photosensitive module 13, is configured to drive the third charges in the third infrared photosensitive module 13 to perform charge transfer along a third preset direction, as shown in fig. 5. Wherein the third preset direction is a downward direction.

The fourth charge rate control module 24, electrically connected to the fourth infrared photosensitive module 14, is configured to drive the fourth charges in the fourth infrared photosensitive module 14 to perform charge transfer along a fourth preset direction, as shown in fig. 5. Wherein the fourth preset direction is a leftward direction.

Specifically, the first infrared photosensitive module 11, the second infrared photosensitive module 12, the third infrared photosensitive module 13 and the fourth infrared photosensitive module 14 respectively compensate image movement generated along the up, down, left and right directions, so that the whole infrared detector can compensate multi-degree-of-freedom image movement of the aircraft due to azimuth, pitching, rolling and compound movement.

It should be noted that, in the embodiment, the description of the four directions of up, down, left and right is to facilitate distinguishing the direction description of the charge moving direction of each infrared photosensitive area, and in an actual scene, the charge moving direction of the infrared photosensitive area only needs to be in accordance with the four direction and mutually perpendicular direction descriptions.

Further, as shown in fig. 3, the first charge rate control module 21 includes first charge rate control units 211 electrically connected to each of the first photosensitive groups 111, where each of the first charge rate control units 211 is configured to drive the first charges in the corresponding first photosensitive group 111 to perform charge transfer along a first preset direction at a first preset transfer rate, and the first preset transfer rate corresponding to each of the first photosensitive groups 111 is different. The first photosensitive group 111 is distinguished by a first photosensitive group 111A, a first photosensitive group 111B, a first photosensitive group 111C, and a first photosensitive group 111D, the first charge rate control unit 211 is distinguished by a first charge rate control unit 211A, a first charge rate control unit 211B, a first charge rate control unit 211C, and a first charge rate control unit 211D, the first photosensitive group 111A is electrically connected to the first charge rate control unit 211A, the first photosensitive group 111B is electrically connected to the first charge rate control unit 211B, the first photosensitive group 111C is electrically connected to the first charge rate control unit 211C, and the first photosensitive group 111D is electrically connected to the first charge rate control unit 211D.

The second charge rate control module 22 includes second charge rate control units 221 electrically connected to each of the second photosensitive groups 121, where each of the second charge rate control units 221 is configured to drive the second charges in the corresponding second photosensitive group 121 to perform charge transfer along a second preset direction at a second preset transfer rate, and the second preset transfer rates corresponding to each of the second photosensitive groups 121 are different. The second photosensitive group 121 is distinguished by a second photosensitive group 121A, a second photosensitive group 121B, a second photosensitive group 121C, and a second photosensitive group 121D, the second charge rate control unit 221 is distinguished by a second charge rate control unit 221A, a second charge rate control unit 221B, a second charge rate control unit 221C, and a second charge rate control unit 221D, the second photosensitive group 121A is electrically connected to the second charge rate control unit 221A, the second photosensitive group 121B is electrically connected to the second charge rate control unit 221B, the second photosensitive group 121C is electrically connected to the second charge rate control unit 221C, and the second photosensitive group 121D is electrically connected to the second charge rate control unit 221D.

The third charge rate control module 23 includes third charge rate control units 231 electrically connected to each third photosensitive group 131, where each third charge rate control unit 231 is configured to drive the third charges in the corresponding third photosensitive group 131 to perform charge transfer along a third preset direction at a third preset transfer rate, and the third preset transfer rates corresponding to each third photosensitive group 131 are different. The third photosensitive group 131 is distinguished by a third photosensitive group 131A, a third photosensitive group 131B, a third photosensitive group 131C, and a third photosensitive group 131D, the third charge rate control unit 231 is distinguished by a third charge rate control unit 231A, a third charge rate control unit 231B, a third charge rate control unit 231C, and a third charge rate control unit 231D, the third photosensitive group 131A is electrically connected to the third charge rate control unit 231A, the third photosensitive group 131B is electrically connected to the third charge rate control unit 231B, the third photosensitive group 131C is electrically connected to the third charge rate control unit 231C, and the third photosensitive group 131D is electrically connected to the third charge rate control unit 231D.

The fourth charge rate control module 24 includes fourth charge rate control units 241 electrically connected to each fourth photosensitive group 141, where each fourth charge rate control unit 241 is configured to drive the fourth charges in the corresponding fourth photosensitive group 141 to perform charge transfer along a fourth preset direction at a fourth preset transfer rate, and the fourth preset transfer rates corresponding to each fourth photosensitive group 141 are different. The fourth photosensitive group 141 is distinguished by a fourth photosensitive group 141A, a fourth photosensitive group 141B, a fourth photosensitive group 141C, and a fourth photosensitive group 141D, the fourth charge rate control unit 241 is distinguished by a fourth charge rate control unit 241A, a fourth charge rate control unit 241B, a fourth charge rate control unit 241C, and a fourth charge rate control unit 241D, the fourth photosensitive group 141A is electrically connected to the fourth charge rate control unit 241A, the fourth photosensitive group 141B is electrically connected to the fourth charge rate control unit 241B, the fourth photosensitive group 141C is electrically connected to the fourth charge rate control unit 241C, and the fourth photosensitive group 141D is electrically connected to the fourth charge rate control unit 241D.

Further, as shown in fig. 3, the four refrigeration modules 3 include:

the first refrigerating module 31 electrically connected to the first infrared photosensitive module 11 is used for controlling the working temperature of the first infrared photosensitive module 11.

The second refrigerating module 32 is electrically connected to the second infrared photosensitive module 12 and is used for controlling the working temperature of the second infrared photosensitive module 12.

The third refrigerating module 33 is electrically connected with the third infrared photosensitive module 13 and is used for controlling the working temperature of the third infrared photosensitive module 13.

The fourth refrigerating module 34 is electrically connected to the fourth infrared photosensitive module 14, and is used for controlling the working temperature of the fourth infrared photosensitive module 14.

Further, as shown in fig. 3, the first refrigeration module 31 includes first refrigeration units 311 electrically connected to each of the first photosensitive groups 111, and each of the first refrigeration units 311 is configured to control an operating temperature of the corresponding first photosensitive group 111. The first refrigerating unit 311 is distinguished by a first refrigerating unit 311A, a first refrigerating unit 311B, a first refrigerating unit 311C, and a first refrigerating unit 311D, the first photosensitive group 111A is electrically connected to the first refrigerating unit 311A, the first photosensitive group 111B is electrically connected to the first refrigerating unit 311B, the first photosensitive group 111C is electrically connected to the first refrigerating unit 311C, and the first photosensitive group 111D is electrically connected to the first refrigerating unit 311D.

The second refrigerating module 32 includes second refrigerating units 321 electrically connected to each second photosensitive group 121, and each second refrigerating unit 321 is used for controlling the working temperature of the corresponding second photosensitive group 121. The second refrigerating unit 321 is distinguished by a second refrigerating unit 321A, a second refrigerating unit 321B, a second refrigerating unit 321C and a second refrigerating unit 321D, the second photosensitive group 121A is electrically connected with the second refrigerating unit 321A, the second photosensitive group 121B is electrically connected with the second refrigerating unit 321B, the second photosensitive group 121C is electrically connected with the second refrigerating unit 321C, and the second photosensitive group 121D is electrically connected with the second refrigerating unit 321D.

The third refrigerating module 33 includes third refrigerating units 331 electrically connected to each third photosensitive group 131, and each third refrigerating unit 331 is configured to control an operating temperature of the corresponding third photosensitive group 131. The third refrigerating unit 331 is distinguished by a third refrigerating unit 331A, a third refrigerating unit 331B, a third refrigerating unit 331C and a third refrigerating unit 331D, the third photosensitive group 131A is electrically connected with the third refrigerating unit 331A, the third photosensitive group 131B is electrically connected with the third refrigerating unit 331B, the third photosensitive group 131C is electrically connected with the third refrigerating unit 331C, and the third photosensitive group 131D is electrically connected with the third refrigerating unit 331D.

The fourth refrigeration module 34 includes fourth refrigeration units 341 electrically connected to each fourth photosensitive group 141, where each fourth refrigeration unit 341 is configured to control an operating temperature of the corresponding fourth photosensitive group 141. The fourth refrigeration unit 341 is divided by a fourth refrigeration unit 341A, a fourth refrigeration unit 341B, a fourth refrigeration unit 341C, and a fourth refrigeration unit 341D, the fourth photosensitive group 141A is electrically connected to the fourth refrigeration unit 341A, the fourth photosensitive group 141B is electrically connected to the fourth refrigeration unit 341B, the fourth photosensitive group 141C is electrically connected to the fourth refrigeration unit 341C, and the fourth photosensitive group 141D is electrically connected to the fourth refrigeration unit 341D.

Further, as shown in fig. 3, the four charge output modules 4 include:

the first charge output module 41, electrically connected to the first refrigeration module 31, is configured to output the charge after image motion compensation in the first infrared photosensitive module 11.

The second charge output module 42 is electrically connected to the second refrigeration module 32, and is configured to output the charge after image-shift compensation in the second infrared photosensitive module 12.

The third charge output module 43, electrically connected to the third refrigeration module 33, is configured to output the charge after image motion compensation in the third infrared photosensitive module 13.

The fourth charge output module 44 is electrically connected to the fourth refrigeration module 34, and is configured to output the charge after image-shift compensation in the fourth infrared photosensitive module 14.

Further, as shown in fig. 3, the first charge output module 41 includes first charge output units 411 electrically connected to each of the first refrigeration units 311, and each of the first charge output units 411 is configured to output the charge after image motion compensation in the corresponding first photosensitive group 111. The first charge output unit 411 is divided into a first charge output unit 411A, a first charge output unit 411B, a first charge output unit 411C, and a first charge output unit 411D, wherein the first charge output unit 411A is electrically connected to the first refrigeration unit 311A, the first charge output unit 411B is electrically connected to the first refrigeration unit 311B, the first charge output unit 411C is electrically connected to the first refrigeration unit 311C, and the first charge output unit 411D is electrically connected to the first refrigeration unit 311D.

The second charge output module 42 includes second charge output units 421 electrically connected to each of the second refrigeration units 321, where each of the second charge output units 421 is configured to output the charge after image motion compensation in the corresponding second photosensitive group 121. The second charge output unit 421 is divided into a second charge output unit 421A, a second charge output unit 421B, a second charge output unit 421C, and a second charge output unit 421D, where the second charge output unit 421A is electrically connected to the second refrigeration unit 321A, the second charge output unit 421B is electrically connected to the second refrigeration unit 321B, the second charge output unit 421C is electrically connected to the second refrigeration unit 321C, and the second charge output unit 421D is electrically connected to the second refrigeration unit 321D.

The third charge output module 43 includes third charge output units 431 electrically connected to each of the third refrigeration units 331, where each of the third charge output units 431 is configured to output the charge after image shift compensation in the corresponding third photosensitive group 131. The third charge output unit 431 is divided into a third charge output unit 431A, a third charge output unit 431B, a third charge output unit 431C, and a third charge output unit 431D, wherein the third charge output unit 431A is electrically connected to the third refrigeration unit 331A, the third charge output unit 431B is electrically connected to the third refrigeration unit 331B, the third charge output unit 431C is electrically connected to the third refrigeration unit 331C, and the third charge output unit 431D is electrically connected to the third refrigeration unit 331D.

The fourth charge output module 44 includes fourth charge output units 441 electrically connected to each of the fourth refrigeration units 341, where each of the fourth charge output units 441 is configured to output the charge after image motion compensation in the corresponding fourth photosensitive group 141. The fourth charge output unit 441 is divided into a fourth charge output unit 441A, a fourth charge output unit 441B, a fourth charge output unit 441C, and a fourth charge output unit 441D, wherein the fourth charge output unit 441A is electrically connected to the fourth refrigeration unit 341A, the fourth charge output unit 441B is electrically connected to the fourth refrigeration unit 341B, the fourth charge output unit 441C is electrically connected to the fourth refrigeration unit 341C, and the fourth charge output unit 441D is electrically connected to the fourth refrigeration unit 341D.

Further, the infrared array CCD detector 1 includes 4096×4096 pixels, and each infrared photosensitive area includes 2048×2048 pixels.

In the above embodiments, the pixels are also called pixel points or pel points, i.e. picture elements (picture elements).

The infrared detector with the multi-degree-of-freedom image motion compensation function comprises a plurality of detector modules which are arranged in an area array and are mutually perpendicular and orthogonal, wherein each detector module comprises a plurality of photosensitive groups with different image motion rates, each photosensitive group is respectively and electrically connected with a charge rate control unit and a horizontal output register, the horizontal output registers are electrically connected with the charge output module, the charge rate control unit drives charges in the photosensitive groups to carry out charge transfer along a preset direction, and the horizontal output registers convey charge information after the image motion compensation of the photosensitive groups to the charge output module to integrate and amplify the charge information and then output the charge information. The infrared detector disclosed by the invention performs on-chip compensation of roll, pitch, yaw and compound multi-freedom-degree dynamic motion on the premise of not increasing and moving hardware, and can reduce the quality, volume, power consumption and cost of an imaging system.

The embodiment of the invention provides an aerial camera supporting multiple-degree-of-freedom image motion compensation function, as shown in fig. 5, which comprises an infrared detector lens 100, a time sequence pulse generator 200, an infrared detector front end signal processing module 300, an infrared detector interface module 400, an infrared detector driving module 500 and any one of the infrared detectors 600 with multiple-degree-of-freedom image motion compensation function.

The infrared detector 600 is respectively connected with the infrared detector lens 100, the infrared detector front end signal processing module 300 and the infrared detector driving module 500, the infrared detector driving module 500 is connected with the time sequence pulse generator 200, and the infrared detector front end signal processing module 300 is connected with the infrared detector interface module 400.

The infrared detector lens 100 is used to collect and focus reflected light of a target scene onto the infrared detector 600.

The infrared detector 600 is used for converting an optical signal into an electrical signal and performing multi-degree-of-freedom image motion compensation.

The timing pulse generator 200 is used for generating timing signals required by the system. The timing signals include horizontal transfer signals, vertical transfer signals, multi-degree-of-freedom image motion compensation timing driving signals, and the like.

The infrared detector driving module 500 is configured to amplify the timing signal generated by the timing pulse generator 200 into a driving level signal having sufficient voltage and current driving capability, and generate a dc bias voltage required by the infrared detector 600.

The infrared detector front-end signal processing module 300 is configured to perform front-end processing on a signal generated by the infrared detector 600. The processing operations include clamping, amplification, correlated double sampling, analog-to-digital conversion, and the like.

The infrared detector interface module 400 is configured to output the digital signal after analog-to-digital conversion.

The timing pulse generator 200 is developed by using an FPGA, the infrared detector driving module 500 is developed by using a dedicated chip, the infrared detector front-end signal processing module 300 is developed by using a dedicated chip, and the infrared detector interface module 400 is developed by using a dedicated chip, which is a camelink interface.

The aero-camera supporting the multi-degree-of-freedom image motion compensation function can perform on-chip compensation of roll, pitch, yaw and compound multi-degree-of-freedom dynamic motion on the premise of not increasing and moving hardware, and can reduce the quality, volume, power consumption and cost of an imaging system.

The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

Claims (10)

1. An infrared detector with multi-degree-of-freedom image motion compensation function, comprising:

the infrared array CCD detector comprises four infrared photosensitive areas which are divided into a 'field' -shaped form in advance, wherein each infrared photosensitive area comprises a preset number of photosensitive groups with different image shift rates, which are arranged in parallel or side by side;

the four charge rate control modules are respectively arranged in the four infrared photosensitive areas, each charge rate control module is respectively and electrically connected with one infrared photosensitive area and is used for driving charges in the infrared photosensitive areas to transfer along a preset direction so as to perform image motion compensation;

the four refrigeration modules are respectively arranged in the four infrared photosensitive areas, and each refrigeration module is respectively and electrically connected with one infrared photosensitive area and used for controlling the working temperature of the infrared photosensitive area;

and the four charge output modules are respectively and electrically connected with the four refrigeration modules, and each charge output module is respectively and electrically connected with one refrigeration module and is used for outputting charges after image motion compensation in each infrared photosensitive area.

2. The infrared detector with multi-degree-of-freedom image shift compensation function of claim 1, wherein the four infrared photo-sensitive areas comprise a first infrared photo-sensitive module, a second infrared photo-sensitive module, a third infrared photo-sensitive module and a fourth infrared photo-sensitive module, the first infrared photo-sensitive module is perpendicular to the second infrared photo-sensitive module, the second infrared photo-sensitive module is perpendicular to the third infrared photo-sensitive module, the third infrared photo-sensitive module is perpendicular to the fourth infrared photo-sensitive module, the fourth infrared photo-sensitive module is perpendicular to the first infrared photo-sensitive module, the first infrared photo-sensitive module comprises four first photo-sensitive groups with different image shift rates, the second infrared photo-sensitive module comprises four second photo-sensitive groups with different image shift rates, the third infrared photo-sensitive module comprises four third photo-sensitive groups with different image shift rates, and the fourth infrared photo-sensitive module comprises four fourth photo-sensitive groups with different image shift rates.

3. The infrared detector with multiple degrees of freedom image shift compensation of claim 2 wherein the four charge rate control modules comprise:

the first charge rate control module is electrically connected with the first infrared photosensitive module and is used for driving first charges in the first infrared photosensitive module to transfer charges along a first preset direction;

the second charge rate control module is electrically connected with the second infrared photosensitive module and is used for driving second charges in the second infrared photosensitive module to transfer charges along a second preset direction;

the third charge rate control module is electrically connected with the third infrared photosensitive module and is used for driving third charges in the third infrared photosensitive module to transfer charges along a third preset direction;

and the fourth charge rate control module is electrically connected with the fourth infrared photosensitive module and is used for driving fourth charges in the fourth infrared photosensitive module to transfer charges along a fourth preset direction.

4. The infrared detector with multiple degree of freedom image shift compensation function of claim 3, wherein the first charge rate control module comprises first charge rate control units electrically connected with each first photosensitive group respectively, each first charge rate control unit is used for driving first charges in the corresponding first photosensitive group to carry out charge transfer along a first preset direction at a first preset transfer rate, and the first preset transfer rate corresponding to each first photosensitive group is different;

The second charge rate control module comprises second charge rate control units which are respectively and electrically connected with each second photosensitive group, each second charge rate control unit is used for driving second charges in the corresponding second photosensitive group to carry out charge transfer along a second preset direction at a second preset transfer rate, and the second preset transfer rates corresponding to each second photosensitive group are different;

the third charge rate control module comprises third charge rate control units which are respectively and electrically connected with each third photosensitive group, each third charge rate control unit is used for driving third charges in the corresponding third photosensitive group to carry out charge transfer along a third preset direction at a third preset transfer rate, and the third preset transfer rates corresponding to each third photosensitive group are different;

the fourth charge rate control module comprises fourth charge rate control units which are respectively and electrically connected with each fourth photosensitive group, each fourth charge rate control unit is used for driving fourth charges in the corresponding fourth photosensitive group to carry out charge transfer along a fourth preset direction at a fourth preset transfer rate, and the fourth preset transfer rates corresponding to each fourth photosensitive group are different.

5. The infrared detector with multiple degrees of freedom image motion compensation function of claim 2, wherein the four refrigeration modules comprise:

the first refrigerating module is electrically connected with the first infrared photosensitive module and is used for controlling the working temperature of the first infrared photosensitive module;

the second refrigerating module is electrically connected with the second infrared photosensitive module and is used for controlling the working temperature of the second infrared photosensitive module;

the third refrigerating module is electrically connected with the third infrared photosensitive module and is used for controlling the working temperature of the third infrared photosensitive module;

and the fourth refrigerating module is electrically connected with the fourth infrared photosensitive module and is used for controlling the working temperature of the fourth infrared photosensitive module.

6. The infrared detector with multiple degree of freedom image motion compensation function of claim 5, wherein the first refrigerating module comprises first refrigerating units electrically connected with each first photosensitive group respectively, and each first refrigerating unit is used for controlling the working temperature of the corresponding first photosensitive group;

the second refrigerating module comprises second refrigerating units which are respectively and electrically connected with each second photosensitive group, and each second refrigerating unit is used for controlling the working temperature of the corresponding second photosensitive group;

The third refrigerating module comprises third refrigerating units which are respectively and electrically connected with each third photosensitive group, and each third refrigerating unit is used for controlling the working temperature of the corresponding third photosensitive group;

the fourth refrigerating module comprises fourth refrigerating units which are respectively and electrically connected with each fourth photosensitive group, and each fourth refrigerating unit is used for controlling the working temperature of the corresponding fourth photosensitive group.

7. The infrared detector with multiple degrees of freedom image shift compensation of claim 6, wherein the four charge output modules comprise:

the first charge output module is electrically connected with the first refrigerating module and is used for outputting charges subjected to image motion compensation in the first infrared photosensitive module;

the second charge output module is electrically connected with the second refrigerating module and is used for outputting charges subjected to image motion compensation in the second infrared photosensitive module;

the third charge output module is electrically connected with the third refrigerating module and is used for outputting charges subjected to image motion compensation in the third infrared photosensitive module;

and the fourth charge output module is electrically connected with the fourth refrigeration module and is used for outputting the charge subjected to image motion compensation in the fourth infrared photosensitive module.

8. The infrared detector with multiple degrees of freedom image motion compensation function according to claim 7, wherein the first charge output module comprises first charge output units electrically connected with each first refrigeration unit respectively, and each first charge output unit is used for outputting charges after image motion compensation in the corresponding first photosensitive group;

the second charge output module comprises second charge output units which are respectively and electrically connected with each second refrigeration unit, and each second charge output unit is used for outputting the charge subjected to image motion compensation in the corresponding second photosensitive group;

the third charge output module comprises third charge output units which are respectively and electrically connected with each third refrigeration unit, and each third charge output unit is used for outputting the charge subjected to image motion compensation in the corresponding third photosensitive group;

the fourth charge output module comprises fourth charge output units which are respectively and electrically connected with each fourth refrigerating unit, and each fourth charge output unit is used for outputting the charge subjected to image motion compensation in the corresponding fourth photosensitive group.

9. The infrared detector with multiple degree of freedom image motion compensation of claim 1 wherein the infrared array CCD detector comprises 4096 x 4096 pixels and each infrared photosensitive area comprises 2048 x 2048 pixels.

10. An aerial camera supporting multiple degrees of freedom image motion compensation, comprising: the device comprises an infrared detector lens, a time sequence pulse generator, an infrared detector front end signal processing module, an infrared detector interface module and an infrared detector driving module, and is characterized by further comprising: the infrared detector with multi-degree-of-freedom image motion compensation function according to any one of claims 1 to 9;

the infrared detector is respectively connected with the infrared detector lens, the infrared detector front end signal processing module and the infrared detector driving module, the infrared detector driving module is connected with the time sequence pulse generator, and the infrared detector front end signal processing module is connected with the infrared detector interface module;

the infrared detector lens is used for collecting reflected light of a target scenery and focusing the reflected light on the infrared detector;

the infrared detector is used for converting the optical signal into an electric signal and performing multi-degree-of-freedom image motion compensation;

the time sequence pulse generator is used for generating time sequence signals required by the system;

the infrared detector driving module is used for amplifying the time sequence signal generated by the time sequence pulse generator into a driving level signal with enough voltage and current driving capability and generating direct current bias voltage required by the infrared detector;

The infrared detector front-end signal processing module is used for performing front-end processing on signals generated by the infrared detector;

the infrared detector interface module is used for outputting the digital signals after analog-to-digital conversion.