CN1181308C

CN1181308C - Guidance method and device capable of resisting interference of strong light

Info

Publication number: CN1181308C
Application number: CNB001107283A
Authority: CN
Inventors: 邹仲玉; 黄立业
Original assignee: CHANGCHUN SHIKAI TECHNOLOGY INDUSTRY Co Ltd
Current assignee: CHANGCHUN SHIKAI TECHNOLOGY INDUSTRY Co Ltd
Priority date: 2000-07-24
Filing date: 2000-07-24
Publication date: 2004-12-22
Anticipated expiration: 2020-07-24
Also published as: CN1295232A

Abstract

The present invention provides a guidance method and a device for double-CCD strong light interference resistance. CCD area arrays, filters and a video signal processing system are adopted, wherein a light splitting element is arranged in the visual field range of the CCD area arrays to divide incoming ray into two paths, one path is a main light path, and the other path is a secondary light path; one narrow band filter and one CCD area array are arranged in the light propagation direction of the main light path in sequence, and one narrow band filter and one CCD area array are arranged in the light propagation direction of the secondary light path in sequence; two images with different spectral characteristics are formed on the CCD area arrays through the main light path and the secondary light path, and the images are completely aligned in spatial positions; the CCD area arrays are driven by a clock circuit to carry out photoelectric conversion, two paths of full video signals with different content are output, and the full video signals are completely aligned in time series; the signals are subtracted through a signal processing circuit, and the function of strong light interference resistance is realized.

Description

The method of guidance that a kind of anti-high light disturbs

Technical field:

The invention provides method of guidance and device that a kind of anti-high light disturbs, relate to photoelectric guidance Anti-Jamming Technique field,

Background technology:

Before the present invention, in the photoelectric guidance technical field, the prior art of disturbing with the most approaching anti-high light of the present invention is the patent (DE3211354 of West Germany MBB company, S Chmidt), be to adopt single circuit CCD electronic installation, the realization captured target, its shortcoming is: when jamming light source and target light source appear in the electronic gate simultaneously, device can't be distinguished echo signal, guides malfunctioningly, can't carry out guidance work.

Summary of the invention:

The purpose of this invention is to provide the method for guidance that a kind of anti-high light disturbs, solved existing guidance system and be subjected to high light radiation to disturb the malfunctioning problem of guidance.Another object of the present invention has provided corresponding guidance device.

The object of the present invention is achieved like this: adopt CCD face battle array, optical filter and video signal processing system, in CCD face battle array field range, be placed with beam splitter, incident light is divided into two-way, one the tunnel is main optical path, another Lu Weici light path, on the optical propagation direction of main optical path, set gradually a narrow band pass filter and a CCD face battle array, on the optical propagation direction of inferior light path, set gradually a narrow band pass filter and a CCD face battle array, the emittance of target and interference source on two CCD face battle arrays, has formed and has aimed at fully on the locus by the primary and secondary light path, different two images on spectral characteristic, they are driven by a clock circuit carries out opto-electronic conversion, and the output two-way is aimed at the full video signal that content is different fully on sequential, subtract each other through signal processing circuit, realized the effect that anti-high light disturbs.

The inventive system comprises beam splitter, two narrow band pass filters, CCD face battle array, clock circuit and signal processing circuits formations, beam splitter is to be formed by two right angle prism gummeds, it is divided into two-way with incident beam, and what see through a road is main optical path, and a road of reflection is a time light path.On the optical propagation direction of main optical path, place a narrow band pass filter, CCD face battle array successively, CCD face battle array places on the focal plane of main optical path, the centrally aligned of face battle array and perpendicular to optical axis, narrow band pass filter is placed on any position between beam splitter and the CCD face battle array, and, be as the criterion not to be in the light perpendicular to optical axis; On the direction of propagation of inferior light path light, place another narrow band pass filter, CCD face battle array successively, CCD face battle array places on the focal plane of time light path, and the centrally aligned of face battle array and perpendicular to optical axis is as the criterion not to be in the light; The passband wavelength of the narrow band pass filter of main optical path is consistent with the spectral pattern peak value of target, the passband wavelength of the narrow band pass filter on the inferior light path is outside the spectral pattern peak value of target, specification, the model of the CCD face battle array on the primary and secondary light path are in full accord, drive by a clock signal, vision signal is exported by two-way respectively, subtract each other through signal processing circuit, realized anti-high light interference effect.

Remarkable result of the present invention is: adopt beam splitter that target and the former emittance of interference are divided into the two-way contrast, handle through signal circuit, the captured target signal, reach the guidance purpose, under long-term natural background, eliminating full visual field high light disturbs, the restriction of interference-free source space position is when electronic gate entangles target, even there is high light to disturb, still can reliably guide, thereby improve the reliability and the hit rate of photoelectric guidance, simple in structure, Installation and Debugging are convenient, in photoelectric guidance and military industrial technology field, be with a wide range of applications and use value.

Description of drawings:

Fig. 1 is a fundamental diagram of the present invention.

The specific embodiment:

Further describe the present invention below in conjunction with accompanying drawing: in Fig. 1, beam splitter adopts two right angle trigonometry prisms, 1,8 gummeds to form, on the main optical path of its formation and time light path, be sequentially with narrow band pass filter 2, CCD face battle array 3 and narrow band pass filter 4, CCD face battle array 5 respectively, type selecting for narrow band pass filter 2 is that the passband wavelength is consistent with target optical spectrum characteristic curve peak value, all target optical spectrum emittance are all passed through, the passband wavelength of narrow band pass filter 4 drops on outside the target optical spectrum characteristic curve peak value, plays the effect that stops the target optical spectrum emittance to be passed through; Specification, the model type selecting of CCD face battle array 3 and CCD face battle array 5 should be in full accord, select 2/3 inch or 1/3 inch target surface for use, make the emittance of target and interference source be formed on that the space aims at fully, different two images on spectral characteristic, they drive by a clock circuit 6 carries out opto-electronic conversion, the output two-way is aimed on sequential fully, the full video signal that content is different, its signal output connects signal processing circuit 7, subtract each other processing, the captured target signal has been realized the effect that anti-high light disturbs.

The also available colored CCD gamma camera of above-mentioned CCD front replaces, and gets red green two-way, or red blue two-way, and its feature and effect can reach the purpose of this utility model equally.

Claims

1, a kind of pair of method of guidance that the anti-high light of CCD disturbs, adopt CCD face battle array, optical filter and video signal processing system, it is characterized in that: in CCD face battle array field range, be placed with beam splitter, incident light is divided into two-way, one the tunnel is main optical path, another Lu Weici light path, on the optical propagation direction of main optical path, set gradually a narrow band pass filter and a CCD face battle array, set gradually a narrow band pass filter and a CCD face battle array on the optical propagation direction of inferior light path, drive primary and secondary two-way CCD face battle array by a clock circuit, vision signal is exported by two-way respectively, subtract each other through signal processing circuit, realize anti-high light interference effect.

2, according to claim 1 pair of method that the anti-high light of CCD disturbs, it is characterized in that: the passband wavelength of the narrow band pass filter on the main optical path is consistent with the spectral pattern peak value of target, and the passband wavelength of the narrow band pass filter on the inferior light path drops on outside the spectral pattern peak value of target.

3, according to claim 1,2 described pairs of methods that the anti-high light of CCD disturbs, it is characterized in that: specification, the model of CCD face battle array are identical on the primary and secondary light path.

4, the methods of disturbing according to claim 1, the anti-high light of the 2 described couples of CCD is characterized in that: get red green two-way or red blue two-way by a colored CCD gamma camera and replace CCD face battle array on the primary and secondary two-way.