CN116929160A - Dual-channel wide-narrow-view-field common-image-plane seeker imaging optical system - Google Patents

Abstract

The invention provides a double-channel wide-narrow view field common-image-plane seeker imaging optical system which comprises a fairing, wherein a double-channel lens group, an image sensor and a position marker are arranged in the fairing, the fairing is fixedly connected with a bulkhead of a body, the double-channel lens group and the image sensor are fixedly connected with the position marker, the position marker is connected with the fairing, the double-channel lens group and the position marker are connected with the image sensor, and the image sensor is connected with an upper computer. The invention has simple structure and low cost, and can realize different application purposes; through utilizing binary channels group mirror to image, imaging spatial resolution is high, realizes clearly imaging different distance's target, guarantees to the stable clear imaging of different distance objects under big overload fast motion state, is difficult for losing the target, protects binary channels group mirror through the radome fairing simultaneously, and overload resistance is strong, can work under bad weather and extreme environment.

Description

A dual-channel wide and narrow field of view common image plane seeker imaging optical system

Technical field

The present invention relates to the technical field of universal imaging optical systems and methods, and in particular to a dual-channel wide and narrow field of view common image plane seeker imaging optical system.

Background technique

In order to complete autonomous search, identification, positioning and tracking of various targets, the missile needs to install a seeker imaging optical system on its front end. The most important function of the seeker imaging optical system is to output the relative parameters of the missile and the target after stably tracking the detection target in the final guidance stage. The control device on the missile forms control instructions to control the missile's flight direction, attitude and speed, and finally controls the missile's flight direction, attitude and speed. The missile is guided to the target and destroyed by the warhead. With the development of modern battlefield operations, the requirements for missiles to have long detection range, high strike accuracy, large coverage, and miniaturization and generalization are becoming more and more prominent. Therefore, a universal fast zoom guidance that can meet the requirements of long distance and large field of view is sought. The head imaging optical system is of very important significance.

The invention with the publication number CN107883816A provides an imaging seeker optical system that can meet the overall index requirements. It consists of a fairing, a first lens, a second lens, a third lens, a fourth lens and a detector. Each part is in the same order according to the light incident order. Axis settings. After the initial mechanism design is completed, the aberration of the structure is evaluated through Zemax software to determine whether the imaging optical system meets the design requirements. The advantages of this invention: high spatial resolution meets the need for a long operating distance of the imaging seeker; the imaging optical system can work in the temperature range of -40°C ~ 60°C, which is equivalent to the operating temperature range of electronic devices; The instantaneous field of view is large, ensuring that the seeker will not lose the target easily. However, this invention lacks optical devices for close-range imaging and cannot achieve stable and clear imaging of objects at different distances under large overload and rapid movement.

The invention with the publication number CN116087929A provides an optical guide head, including a fairing; a wide-angle optical system, including a partial fairing, a transmission lens group designed in a transmission form, and a first detector; in the propagation direction of light, the above-mentioned The optical components are arranged in sequence according to the light propagation order; the telephoto optical system includes a partial fairing, an aberration correction lens, a coaxial Cassegrain lens group, a residual aberration correction lens group, and a second detector; the telephoto optical system There is a hole in the phase correction lens of the system, and the wide-angle optical system is nested between the telephoto optical system and the fairing. The guidance head provided by this invention has a simple structure and is easy to popularize and apply. The ranging method does not use radar but uses optical means. Through the change of imaging information on the two detectors, confidentiality can be effectively improved. The system has high precision and can conduct detonation distance detection. The detonation accuracy can reach 0.2m, the data processing speed is fast, and the cost is lower than traditional radar forms. However, this invention only uses one lens to image objects and cannot ensure rapid imaging of objects at different distances.

Contents of the invention

In view of the technical problems that the existing seeker imaging optical system has high cost and low overload resistance, the present invention proposes a dual-channel wide and narrow field of view common image plane seeker imaging optical system, which has a simple structure, low cost, and It can achieve continuous and clear imaging of targets at different distances.

In order to achieve the above objects, the technical solution of the present invention is realized as follows: a dual-channel wide and narrow field of view common image plane seeker imaging optical system, including a fairing, the fairing is fixedly connected to the body bulkhead, and the fairing is provided with a The dual-channel lens group, the image sensor and the position marker. The dual-channel lens group and the image sensor are both fixedly connected to the position marker. The position marker is fixedly connected to the fairing. The dual-channel lens group is connected to the image sensor. The image sensor and the position marker are fixedly connected. The markers are all connected to the host computer.

The fairing includes a front fairing and a rear fairing, the front fairing and the rear fairing are fixedly connected, the base of the position marker is connected to the rear fairing, and the image sensor is arranged in the rear fairing. The rear fairing is fixedly connected to the body bulkhead.

The front side fairing is a transparent fairing.

The dual-channel lens group includes a long focal length mirror and a short focal length mirror. The long focal length mirror and the short focal length mirror are both fixedly connected to the position marker. The long focal length mirror and the short focal length mirror are both connected to the image sensor.

The position marker includes a bracket, motor I and motor II. The long focal length mirror and the short focal length mirror are both connected to the bracket. The bracket is connected to the rear fairing through the base. Motor I and motor II are both connected to the host computer.

The bracket includes an annular frame, an inner bracket and an outer bracket arranged in sequence from the inside to the outside. The long focal length lens and the short focal length lens are both fixedly connected to the annular frame, and one side of the inner bracket and the outer bracket is connected to the motor I. The other sides of the inner bracket and the outer bracket are movably connected through bearings. The bottoms of the annular frame and the inner bracket are both connected to the motor II. The annular frame and the top of the inner bracket are movably connected through bearings.

When the optical system collects images of the target object, the long focal length lens and the short focal length lens obtain the graphic information of the target object at the same time, and transmit the acquired images to the image sensor at the same time, so as to obtain two wide imaging fields of different sizes at the same time. and narrow imaging field of view, and the wide imaging field of view or narrow imaging field of view is calibrated as the main imaging field of view according to the distance of the target object.

The image of the target object acquired by the long focal length lens has a narrow imaging field of view, and the image of the target object acquired by the short focal length lens has a wide imaging field of view.

The method of calibrating the main imaging field of view according to the distance of the target object is:

When imaging distant target objects, the narrow imaging field of view is calibrated as the main imaging field of view. When imaging close target objects, the wide imaging field of view is calibrated as the main imaging field of view.

According to the position of the target object, the host computer drives the outer bracket to rotate longitudinally by controlling the motor I of the rotating position marker, thereby driving the long focal length lens and the short focal length lens to rotate longitudinally. The host computer controls the motor II of the rotating position marker to control The inner bracket rotates laterally, thereby driving the long focal length lens and the short focal length lens to rotate laterally, adjusting the orientation of the long focal length lens and the short focal length lens to image the target object.

The beneficial effects of the present invention are: (1) When the imaging optical system of the present invention is running, the imaging distance is from far to near, and two fixed focal lengths are generated through the dual-channel lens group. The image sensor is combined with the dual-channel lens group to achieve two fixed focal lengths at the same time. Wide and narrow imaging field of view functions of different sizes.

(2) The present invention uses a position marker to enable the dual-channel lens group to perform imaging field requirements at any angle, and simultaneously obtains a wide and narrow imaging field of view for the target object through the dual-channel lens group, ensuring that different imaging fields can be imaged under large overload and rapid movement conditions. Stable and clear imaging of distant objects, making it difficult to lose the target. At long distances, the telephoto lens group dominates the image; at close range, the short focal length lens group dominates the image. The invention detects the target's position, deflection and elevation in real time, and provides the position and attitude information to the host computer to form control instructions, control the missile's flight trajectory, and achieve the purpose of tracking and guidance.

(3) The invention has a simple structure and low cost, and can achieve different application purposes; by using the fairing to protect the dual-channel lens group, image sensor and position marker, the optical system can work in harsh weather and extreme environments.

Description of the drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are only These are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without exerting creative efforts.

Figure 1 is a schematic structural diagram of the imaging optical system of the dual-channel wide and narrow field of view common image plane seeker.

Figure 2 is an imaging effect diagram of a specific embodiment, wherein Figure 2(a) is an imaging effect diagram of the system when a long focal length lens is used, and Figure 2(b) is an imaging effect diagram of the system when a short focal length lens is used.

In the picture, 1 is the dual-channel lens group, 11 is the long focal length lens, 12 is the short focal length lens, 2 is the fairing, 21 is the front fairing, 22 is the rear fairing, 3 is the position marker, and 31 is the motor. Ⅰ, 32 is motor Ⅱ.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without exerting creative efforts fall within the scope of protection of the present invention.

As shown in Figure 1, a dual-channel wide and narrow field of view common image plane seeker imaging optical system includes a fairing 2. A dual-channel lens group 1, an image sensor and a position marker are provided inside the fairing 2. The fairing 2 Fixedly connected to the body bulkhead.

Among them, the fairing 2 includes a front fairing 21 and a rear fairing 22. The front fairing 21 and the rear fairing 22 are fixedly connected. The image sensor is arranged in the rear fairing 22. The position marker 3 is connected to the dual-channel The lens groups 1 are all arranged in the front side fairing 21 . The fairing 2 is mainly used to protect the optical and electronic devices inside the imaging optical system, so that the dual-channel lens group 1 can work in bad weather and extreme environments. The front side fairing 21 is a transparent fairing, which ensures that the dual-channel lens group 1 can clearly capture the outside world without being interfered by factors such as strong winds from the outside. It also provides a certain space for the dual-channel lens group 1 to rotate.

The dual-channel lens group 1 includes a long focal length lens 11 and a short focal length lens 12. The long focal length lens 11 and the short focal length lens 12 differ by a certain multiple. The focal lengths of the long focal length lens 11 and the short focal length lens 12 are selected according to the actual missile's action distance. The long focal length lens 11 and the short focal length lens 12 are specifically used to image the target object at the same time, and transmit the imaging information to the host computer through the image sensor in real time. According to the usage requirements, the dual-channel lens group can perform imaging field of view requirements in any direction and at any angle, and the optical axes of the two lens groups can be set to be parallel or non-parallel according to actual needs to ensure that the fields of view of the two lenses overlap with each other. , can image objects at the same location. Specifically, when the distance to the target object is close, the imaging of the calibrated short focal length lens 12 is the main imaging field of view; when the distance to the target object is far away, the imaging of the calibrated long focal length lens 11 is the main imaging field of view.

The position marker 3 includes a bracket, a motor I 31 and a motor II 32. The long focal length lens 11 and the short focal length lens 12 are both connected to the bracket. The bracket is connected to the rear fairing 22 through the base. Both the motor I 31 and the motor II 32 Connected to the host computer. The position marker 3 uses the bracket, motor I 31 and motor II 32 to control the long focal length lens 11 and the short focal length lens 12 to image the object at the same position under the control of the host computer.

Specifically, the bracket includes an annular frame, an inner bracket and an outer bracket arranged in sequence from the inside to the outside. The long focal length lens 11 and the short focal length lens 12 are both fixedly connected to the annular frame. The outside of the inner bracket and the inside of the outer bracket are driven by the motor I 31 are connected, and the other sides of the inner bracket and the outer bracket are movablely connected through bearings, so that the inner bracket can rotate longitudinally under the control of the motor I 31. The outer bottom of the annular frame and the inner bottom of the inner bracket are connected through the motor II 32. The annular frame and the top of the inner bracket are movably connected through bearings, so that the annular frame can rotate laterally relative to the inner bracket.

During use, according to the position of the target object, the host computer receives the image information collected by the long focal length lens 11 and the short focal length lens 12 in real time, and controls the positioner 3 to rotate the long focal length lens according to the relative position of the target object in the image and the center of the field of view. 11 and short focal length lens 12 to detect and determine the position of the missile relative to the target object in real time. The host computer drives the inner bracket to rotate longitudinally by controlling the motor I 31 of the rotating position marker 3, thereby driving the long focal length lens 11 and the short focal length lens 12 to rotate longitudinally. The host computer controls the motor II 32 of the rotating position marker 3. The outer bracket rotates laterally, thereby driving the long focal length lens 11 and the short focal length lens 12 to rotate laterally, adjusting the orientation of the long focal length lens 11 and the short focal length lens 12 to image the target object, ensuring that the target object is always within the field of view.

When collecting images of a target object, the long focal length lens 11 and the short focal length lens 12 simultaneously image the target object and transmit the acquired images to the image sensor at the same time to achieve simultaneous acquisition of two wide and narrow imaging fields of different sizes. , and calibrate the main imaging field of view according to the distance of the target object. When imaging a distant object, the imaging of the long focal length lens 11 is calibrated as the main imaging field of view. When imaging a close object, the imaging of the short focal length lens 12 is calibrated as the main imaging field of view. The imaging optical system achieves composite imaging through a dual-channel lens group. The imaging field of view can meet the requirements for the target object when the imaging distance is from far to near, ensuring that clear imaging can be achieved regardless of the distance of the target object. At the same time, according to the position of the target object, the host computer controls the rotor of the rotating position marker 3 to adjust the orientation of the long focal length lens 11 and the short focal length lens 12, thereby ensuring that the target object is always within the field of view.

Specifically, the imaging optical system proposed by the present invention can be installed at the missile seeker. When used, the long focal length lens 11 and the short focal length lens 12 collect image information of the target object in real time and transmit the image information to the host computer. The host computer collects the image information of the target object in real time based on the long focal length lens 11 and the short focus lens 12 to detect the position and deflection angle of the target object, and provides the pose information to the host computer to form a control instruction to determine the position of the missile relative to the target object. . According to the position of the target object, the host computer drives the outer bracket to rotate longitudinally by controlling the motor I 31 of the rotating position marker 3, thereby driving the long focal length lens 11 and the short focal length lens 12 to rotate longitudinally. The host computer controls the rotating position marker 3 The motor II 32 controls the inner bracket to rotate laterally, thereby driving the long focal length lens 11 and the short focal length lens 12 to rotate laterally, adjusting the orientation of the long focal length lens 11 and the short focal length lens 12 to image the target object. When the missile is far away from the target object, the imaging of the long focal length mirror 11 is calibrated as the main imaging field of view. When the missile is close to the target object, the imaging of the short focal length mirror 12 is calibrated as the main imaging field of view, which facilitates the host computer to quickly image deal with.

Before the missile is launched, the imaging optical system uses the long focal length lens 11 and the short focal length lens 12 to image the target object, and transmits the image to the host computer through the image sensor. Since the missile is far away from the target object, the host computer selects the imaging of the long focal length lens 11 as the main imaging field of view. After the missile is launched, the position between the missile and the target object continues to change. The host computer receives the images of the target object collected from the long focal length lens 11 and the short focal length lens 12 through the image sensor in real time, and determines the direction and distance of the target object from the center of the field of view. distance, thereby controlling the longitudinal or transverse rotation of the long focal length mirror 11 and the short focal length mirror 12 through the motor I 31 and the motor II 32 in the position marker 3 to ensure that the target object stays within the field of view in real time. At the same time, the imaging optical system analyzes the position and deflection angle of the target object relative to the missile through the images collected by the long focal length lens 11 and the short focal length lens 12, and provides the position and attitude information to the host computer to form control instructions to control the missile flight trajectory. To achieve the purpose of tracking and guidance.

As shown in Figure 2, the imaging optical system is used to clearly image the same car on the ground at the same time and distance. According to the distance between the car and the imaging optical system, the focal lengths of the long focal length mirror 11 and the short focal length mirror 12 are finally set to f ₁ respectively. , f2 _. The imaging effect under the long focal length lens 11 is shown in Figure 2(a), and the imaging effect under the short focal length lens 12 is shown in Figure 2(b). It can be seen from Figure 2 that the imaging optical system can simultaneously target the target object. Get 2 wide and narrow imaging fields of view with different sizes, and the imaging is clear. Figure 2 shows that the present invention can realize clear imaging of targets at different distances and continuously lock the target. The present invention has good versatility, low cost, and can achieve different application purposes.

The above descriptions are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the present invention. within the scope of protection.

Claims (10)

1. The utility model provides a binary channels wide and narrow visual field common image plane seeker imaging optical system, a serial communication port, including radome fairing (2), radome fairing (2) and body bulkhead fixed connection, radome fairing (2) inside is provided with binary channels mirror group (1), image sensor and potential sign ware (3), binary channels mirror group (1) and image sensor all with potential sign ware (3) fixed connection, potential sign ware (3) and radome fairing (2) fixed connection, binary channels mirror group (1) are connected with image sensor, image sensor and potential sign ware (3) all are connected with the host computer.

2. The dual-channel wide-narrow field-of-view common-view seeker imaging optical system according to claim 1, wherein the fairing (2) comprises a front fairing (21) and a rear fairing (22), the front fairing (21) is fixedly connected with the rear fairing (22), the base of the position marker (3) is connected with the rear fairing (22), the image sensor is arranged in the rear fairing (22), and the rear fairing (22) is fixedly connected with the bulkhead of the body.

3. The dual-channel wide-narrow field-of-view common-view seeker imaging optical system according to claim 2, characterized in that the front fairing (21) is a transparent fairing.

4. The dual-channel wide-narrow field-of-view common-image-plane seeker imaging optical system according to claim 2, wherein the dual-channel lens group (1) comprises a long-focal-length lens (11) and a short-focal-length lens (12), the long-focal-length lens (11) and the short-focal-length lens (12) are fixedly connected with the position marker (3), and the long-focal-length lens (11) and the short-focal-length lens (12) are connected with the image sensor.

5. The dual-channel wide-narrow-field common-view seeker imaging optical system according to claim 4, wherein the position marker (3) comprises a bracket, a motor I (31) and a motor II (32), the long-focus lens (11) and the short-focus lens (12) are connected with the bracket, the bracket is connected with the rear fairing (22) through a base, and the motor I (31) and the motor II (32) are connected with an upper computer.

6. The dual-channel wide-narrow view field common-view-field seeker imaging optical system according to claim 5, wherein the support comprises an annular frame, an inner support and an outer support which are sequentially arranged from inside to outside, the long-focus lens (11) and the short-focus lens (12) are fixedly connected with the annular frame, one sides of the inner support and the outer support are connected with the motor I (31), the other sides of the inner support and the outer support are movably connected through bearings, the bottoms of the annular frame and the inner support are connected with the motor II (32), and the annular frame and the top of the inner support are movably connected through bearings.

7. The method for using the dual-channel wide-and-narrow-field common-view seeker imaging optical system according to claim 5 or 6, wherein when the optical system collects images of a target object, the long-focal-length mirror (11) and the short-focal-length mirror (12) acquire graphic information of the target object at the same time, and transmit the acquired images to the image sensor at the same time, so as to obtain 2 wide imaging fields and narrow imaging fields with different sizes at the same time, and the wide imaging fields or the narrow imaging fields are calibrated as main imaging fields according to the distance between the target objects.

8. The method for using the dual-channel wide-narrow-field common-view seeker imaging optical system according to claim 7, wherein the image of the target object acquired by the long-focus mirror (11) is a narrow imaging field, and the image of the target object acquired by the short-focus mirror (12) is a wide imaging field.

9. The method for using the dual-channel wide-narrow-field common-view seeker imaging optical system according to claim 8, wherein the method for calibrating the main imaging field according to the target object distance is as follows:

when imaging a long-distance target object, a narrow imaging field of view is designated as a main imaging field of view, and when imaging a short-distance target object, a wide imaging field of view is designated as a main imaging field of view.

10. The method for using the dual-channel wide-narrow-field common-view seeker imaging optical system according to claim 8 or 9, wherein according to the position of a target object, an upper computer drives an outer bracket to longitudinally rotate by controlling a motor I (31) of a rotary position marker (3) so as to drive a long-focus lens (11) and a short-focus lens (12) to longitudinally rotate, and the upper computer controls an inner bracket to transversely rotate by controlling a motor II (32) of the rotary position marker (3) so as to drive the long-focus lens (11) and the short-focus lens (12) to transversely rotate, so that the positions of the long-focus lens (11) and the short-focus lens (12) are adjusted to image the target object.