CN116929160A - Dual-channel wide-narrow-view-field common-image-plane seeker imaging optical system - Google Patents
Dual-channel wide-narrow-view-field common-image-plane seeker imaging optical system Download PDFInfo
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- CN116929160A CN116929160A CN202310951116.2A CN202310951116A CN116929160A CN 116929160 A CN116929160 A CN 116929160A CN 202310951116 A CN202310951116 A CN 202310951116A CN 116929160 A CN116929160 A CN 116929160A
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- 238000003384 imaging method Methods 0.000 title claims abstract description 114
- 230000003287 optical effect Effects 0.000 title claims abstract description 48
- 239000003550 marker Substances 0.000 claims abstract description 31
- 238000000034 method Methods 0.000 claims description 7
- 230000000007 visual effect Effects 0.000 claims description 2
- 230000033001 locomotion Effects 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 5
- 230000004075 alteration Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000005474 detonation Methods 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
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- 238000012986 modification Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
- H04N7/181—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast for receiving images from a plurality of remote sources
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
- F42B15/00—Self-propelled projectiles or missiles, e.g. rockets; Guided missiles
- F42B15/01—Arrangements thereon for guidance or control
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/04—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/14—Mountings, adjusting means, or light-tight connections, for optical elements for lenses adapted to interchange lenses
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
Technical Field
The invention relates to the technical field of universal imaging optical systems and methods, in particular to a dual-channel wide-narrow-field common-image-plane seeker imaging optical system.
Background
In order to complete autonomous searching, identifying, positioning and tracking of various targets, the missile needs to install a seeker imaging optical system at the front end of the missile. The main function of the seeker imaging optical system is to stably track a detected target in a terminal guidance stage, then output relative parameters of a missile and the target, and a missile-borne control device forms a control instruction to control the flying direction, the gesture and the speed of the missile so as to finally guide the missile to the target and destroy the target by a warhead. Along with the development of modern battlefield operations, the requirements of long missile detection distance, high striking precision, large coverage range and miniaturization and generalization are more and more highlighted, so that the search for a universal fast-changing Jiao Dao leading imaging optical system capable of meeting the requirements of long distance and large field of view has very important significance.
The invention with the publication number of CN107883816A provides an imaging seeker optical system capable of meeting the overall index requirement, which consists of a fairing, a first lens, a second lens, a third lens, a fourth lens and a detector, wherein all parts are coaxially arranged according to the incident sequence of light rays. After the initial mechanism design is completed, aberration evaluation is carried out on the structure through Zemax software, and whether the imaging optical system meets the design requirement is judged according to the aberration evaluation. The invention has the advantages that: the high spatial resolution meets the requirement of long acting distance of the imaging guide head; the imaging optical system can work in the temperature range of-40 ℃ to 60 ℃ which is equivalent to the working temperature range of the electronic device; the instantaneous field of view is big, has guaranteed that the seeker is difficult for losing the target. However, the invention lacks an optical device for short-distance imaging, and can not realize stable and clear imaging of objects with different distances in a large overload rapid motion state.
The invention disclosed in publication number CN116087929a provides an optical guide head comprising a fairing; the wide-angle optical system comprises a partial fairing, a transmission lens group designed according to a transmission form and a first detector; the optical components are sequentially arranged in the light propagation sequence in the light propagation direction; the long-focus optical system comprises a part of fairing, an aberration correcting lens, a coaxial Cassegrain form lens group, a residual aberration correcting lens group and a second detector; and a hole is formed in the phase difference correcting lens of the long-focus optical system, and the wide-angle optical system is nested and arranged between the long-focus optical system and the fairing. The guiding head provided by the invention has the advantages of simple structure, easiness in popularization and application, no radar mode in a ranging mode, high system precision, capability of effectively improving confidentiality through the change of imaging information on the two detectors, capability of achieving 0.2 m detonation precision when detonation distance detection is carried out, high data processing speed and lower cost compared with the traditional radar mode. However, the invention uses only one lens to image the object, and cannot ensure rapid imaging of objects with different distances.
Disclosure of Invention
Aiming at the technical problems of higher cost and lower overload resistance of the existing seeker imaging optical system, the invention provides the dual-channel wide-narrow view field common-image-plane seeker imaging optical system which has a simple structure and lower cost and can realize continuous and clear imaging of targets with different distances.
In order to achieve the above purpose, the technical scheme of the invention is realized as follows: the utility model provides a binary channels wide and narrow visual field common image surface seeker imaging optical system, includes the radome fairing, radome fairing and body bulkhead fixed connection, and the radome fairing is inside to be provided with binary channels mirror group, image sensor and position marker, binary channels mirror group and image sensor all with position marker fixed connection, position marker and radome fairing fixed connection, binary channels mirror group is connected with image sensor, and image sensor and position marker all are connected with the host computer.
The fairing comprises a front fairing and a rear fairing, the front fairing is fixedly connected with the rear fairing, a base of the position marker is connected with the rear fairing, the image sensor is arranged in the rear fairing, and the rear fairing is fixedly connected with the bulkhead of the body.
The front fairing is a transparent fairing.
The double-channel lens group comprises a long-focus lens and a short-focus lens, the long-focus lens and the short-focus lens are fixedly connected with the position marker, and the long-focus lens and the short-focus lens are connected with the image sensor.
The position marker comprises a support, a motor I and a motor II, wherein the long-focus lens and the short-focus lens are connected with the support, the support is connected with the rear-side fairing through a base, and the motor I and the motor II are connected with an upper computer.
The support includes by interior ring frame, inner support and the outer support that sets gradually outward, long focus mirror and short focus mirror all lead to with ring frame fixed connection, one side of inner support and outer support all is connected with motor I, and the opposite side of inner support and outer support passes through bearing swing joint, and ring frame all is connected with motor II with the bottom of inner support, and ring frame passes through bearing swing joint with the inner support top.
When the optical system collects images of the target object, the long-focus lens and the short-focus lens acquire graphic information of the target object at the same time, and the acquired images are transmitted to the image sensor at the same time, so that 2 wide imaging fields and narrow imaging fields with different sizes are acquired at the same time, and the wide imaging fields or the narrow imaging fields are calibrated to be main imaging fields according to the distance between the target object.
The image of the target object acquired by the long-focus lens is a narrow imaging view field, and the image of the target object acquired by the short-focus lens is a wide imaging view field.
The method for calibrating the main imaging view field according to the distance between the target objects comprises the following steps:
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.
According to the position of the target object, the upper computer drives the outer support to longitudinally rotate by controlling the motor I of the rotary position marker, so that the long-focus lens and the short-focus lens are driven to longitudinally rotate, and the upper computer controls the inner support to transversely rotate by controlling the motor II of the rotary position marker, so that the long-focus lens and the short-focus lens are driven to transversely rotate, and the positions of the long-focus lens and the short-focus lens are adjusted to image the target object.
The beneficial effects of the invention are as follows: (1) The imaging optical system of the invention has the imaging distance from far to near when in operation, 2 fixed focal lengths are generated through the double-channel lens group, and the image sensor is combined with the double-channel lens group to realize the function of simultaneously obtaining 2 wide and narrow imaging view fields with different sizes.
(2) The invention uses the position marker to make the two-channel lens group capable of carrying out imaging view field requirements of any angle, and simultaneously obtains wide and narrow imaging view fields of the target object through the two-channel lens group, thereby ensuring stable and clear imaging of objects with different distances under the condition of large overload and rapid movement and ensuring that the target is not easy to be lost. At long distances, long Jiao Jingzu imaging predominates; at close distances, short focal lens imaging is the dominant. The invention detects the position and the deflection angle elevation angle of the target in real time, provides pose information for the upper computer to form a control instruction, controls the missile flight track, and realizes the aim of tracking guidance.
(3) The invention has simple structure and low cost, and can realize different application purposes; the optical system can work in severe weather and extreme environments by protecting the dual-channel lens set, the image sensor and the position marker by using the fairing.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a dual channel wide-narrow field-of-view common-image-plane seeker imaging optical system.
Fig. 2 is an imaging effect diagram of an embodiment, in which fig. 2 (a) is an imaging effect diagram of the system when a long focal length mirror is used, and fig. 2 (b) is an imaging effect diagram of the system when a short focal length mirror is used.
In the figure, 1 is a double-channel lens group, 11 is a long-focus lens, 12 is a short-focus lens, 2 is a fairing, 21 is a front fairing, 22 is a rear fairing, 3 is a position marker, 31 is a motor I, and 32 is a motor II.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without any inventive effort, are intended to be within the scope of the invention.
As shown in fig. 1, the dual-channel wide-narrow view field common-image-plane seeker imaging optical system comprises a fairing 2, wherein a dual-channel lens group 1, an image sensor and a position marker are arranged in the fairing 2, and the fairing 2 is fixedly connected with a bulkhead of a body.
The fairing 2 includes a front fairing 21 and a rear fairing 22, the front fairing 21 is fixedly connected with the rear fairing 22, the image sensor is disposed in the rear fairing 22, and the position marker 3 and the dual-channel lens group 1 are both disposed in the front fairing 21. The fairing 2 is mainly used for protecting optics and electronic devices in the imaging optical system, so that the dual-channel lens group 1 can work in severe weather and extreme environments. The front fairing 21 is a transparent fairing, so that the two-channel lens group 1 can clearly shoot an external picture while being free from being interfered by factors such as external strong wind, and a certain space is provided for the two-channel lens group 1 to rotate.
The dual-channel lens group 1 comprises a long-focus lens 11 and a short-focus lens 12, the long-focus lens 11 and the short-focus lens 12 are different by a certain multiple, and the focal lengths of the long-focus lens 11 and the short-focus lens 12 are selected according to the action distance of an actual missile. The long focal length mirror 11 and the short focal length mirror 12 are specifically used for simultaneously imaging a target object, and transmitting imaging information to an upper computer through an image sensor in real time. According to the use requirement, the two-channel lens group can carry out imaging view field requirements of any angle in any direction, and the optical axis directions of the two lens groups can be parallel or non-parallel according to actual requirements, so that the large overlapping area of the view fields of the two lenses is ensured, and objects at the same position can be imaged. Specifically, imaging by the mirror 12 with a short focal length is designated as a main imaging field when the mirror is close to the target object, and imaging by the mirror 11 with a long focal length is designated as a main imaging field when the mirror is far from the target object.
The position marker 3 comprises a support, a motor I31 and a motor II 32, wherein the long-focus lens 11 and the short-focus lens 12 are connected with the support, the support is connected with the rear-side fairing 22 through a base, and the motor I31 and the motor II 32 are connected with an upper computer. The position marker 3 controls the long-focus mirror 11 and the short-focus mirror 12 to image objects at the same position under the control of the upper computer through the support, the motor I31 and the motor II 32.
Specifically, the support includes by interior ring frame, inner support and the outer support that sets gradually outward, long focus mirror 11 and short focus mirror 12 all lead to with ring frame fixed connection, the outside of inner support and the inboard of outer support are connected through motor I31, and the opposite side of inner support and outer support passes through bearing swing joint, makes the inner support can longitudinal rotation under the control of motor I31. The bottom of the outer side of the annular frame is connected with the bottom of the inner side of the inner support through a motor II 32, and the annular frame is movably connected with the top of the inner support through a bearing, so that the annular frame can transversely rotate relative to the inner support.
When the missile is used, the upper computer receives image information collected by the long-focus lens 11 and the short-focus lens 12 in real time according to the position of a target object, and controls the position indicator 3 to rotate the long-focus lens 11 and the short-focus lens 12 according to the relative position of the target object and the center of a field of view in the image so as to detect and judge the position of the missile relative to the target object in real time. The upper computer drives the inner support to longitudinally rotate by controlling the motor I31 of the rotary position marker 3 so as to drive the long-focus lens 11 and the short-focus lens 12 to longitudinally rotate, and controls the outer support to transversely rotate by controlling the 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, and the positions of the long-focus lens 11 and the short-focus lens 12 are adjusted to image a target object, so that the target object is always in a view field.
When an image of a target object is collected, the long focal length mirror 11 and the short focal length mirror 12 simultaneously image the target object, and simultaneously transmit the acquired images to the image sensor, so as to obtain 2 wide and narrow imaging fields of view with different sizes simultaneously, and calibrate the main imaging fields of view according to the distance between the target objects. The imaging of the long-focal-length mirror 11 is designated as a main imaging field when imaging a distant object, and the imaging of the short-focal-length mirror 12 is designated as a main imaging field when imaging a close object. The imaging optical system realizes compound imaging through the double-channel lens group, the imaging field of view of the imaging optical system can meet the requirements on a target object when the imaging distance is from far to near, and clear imaging can be realized no matter the target object is far or near. Meanwhile, according to the position of the target object, the upper computer controls the rotor of the rotary position marker 3 to adjust the orientations of the long-focus mirror 11 and the short-focus mirror 12, so that the target object is ensured to always exist in the field of view.
Specifically, the imaging optical system provided by the invention can be installed at the missile seeker, and when the system is used, the long-focal-length mirror 11 and the short-focal-length mirror 12 collect image information of a target object in real time and transmit the image information to an upper computer. The upper computer collects the image information of the target object in real time according to the long focal length mirror 11 and the short focal length mirror 12, detects the position and the deflection angle elevation angle of the target object, provides pose information for the upper computer to form a control instruction, and judges the position of the missile relative to the target object. According to the position of the target object, the upper computer drives the outer support to longitudinally rotate by controlling the motor I31 of the rotary position marker 3 so as to drive the long-focus lens 11 and the short-focus lens 12 to longitudinally rotate, and the upper computer controls the inner support to transversely rotate by controlling the 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. When the missile is far away from the target object, the imaging of the long-focus lens 11 is marked as a main imaging view field, and when the missile is near to the target object, the imaging of the short-focus lens 12 is marked as a main imaging view field, so that the upper computer can conveniently and rapidly perform image processing.
Before missile launching, the imaging optical system uses a long-focus mirror 11 and a short-focus mirror 12 to image a target object, and transmits the image to an upper computer through an image sensor. Since the missile is far from the target object, the upper computer selects the imaging of the long-focal-length mirror 11 as the main imaging field of view. After the missile is launched, the position between the missile and the target object is continuously changed, the upper computer receives images of the target object collected by the long-focus lens 11 and the short-focus lens 12 in real time through the image sensor, and judges the direction and the distance of the target object from the center of the field of view, so that the motor I31 and the motor II 32 in the position marker 3 control the long-focus lens 11 and the short-focus lens 12 to longitudinally or transversely rotate, and the target object is ensured to stay in the field of view in real time. Meanwhile, the imaging optical system analyzes the position and the deflection angle elevation angle of the target object relative to the missile through the images collected by the long-focus lens 11 and the short-focus lens 12, and provides pose information for an upper computer to form a control instruction, so that the flight track of the missile is controlled, and the purpose of tracking guidance is realized.
As shown in fig. 2, the imaging optical system is used to perform clear imaging on the same car on the ground at the same time and same distance, and the focal lengths of the long focal length mirror 11 and the short focal length mirror 12 are finally set to be respectively as follows according to the distance between the car and the imaging optical systemf 1 、f 2 . The imaging effect under the long focal length mirror 11 is shown in fig. 2 (a), the imaging effect under the short focal length mirror 12 is shown in fig. 2 (b), and as can be seen from fig. 2, the imaging optical system can simultaneously obtain 2 wide and narrow imaging view field functions with different sizes for the target object, and the imaging is clear. The invention can realize clear imaging of targets with different distances and continuous target locking, has better universality and low cost, and can realize different application purposes.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
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.
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| CN202310951116.2A CN116929160A (en) | 2023-07-31 | 2023-07-31 | Dual-channel wide-narrow-view-field common-image-plane seeker imaging optical system |
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