An optical imaging system suitable for day and night low light conditions

Abstract

The invention relates to an optical imaging system suitable for weak-light condition of day and night. From object space to image space, the system orderly comprises a ball cover with negative diopter, a first lens with positive diopter, a second lens with negative diopter, a third lens with positive diopter, a fourth lens with negative diopter and a detector target surface, wherein a diaphragm is arranged between the second lens and the third lens. The system not only maintains the advantage of low cost of TV terminal guidance seeker, but also improves the capability of accurate capturing and tracking of the target under the conditions of complex background and strong interference. The system simultaneously extends the use conditions of the seeker, and therefore, the system can not only be used in clear day, but also in misty day and under anti-smoke interference condition. When the illumination of night light is larger than 0.01 lx, the system can accurately fight targets and effectively improve the penetration ability and operational effectiveness of missiles.

Description

technical field [0001] The invention relates to an imaging mechanism used in the field of television terminal guidance in a precise guidance mode, in particular suitable for a low-light imaging system used in a near-infrared television terminal guidance seeker for band expansion under conventional television terminal guidance. Background technique [0002] With the rapid development of science and technology, the battlefield environment of future wars will become increasingly complex, requiring precision-guided weapons to accurately intercept and track targets under complex backgrounds and strong interference. The use of tactical precision guidance technology for missile terminal guidance can effectively improve the missile’s defense penetration capability and combat effectiveness. The most common TV terminal guidance terminal guidance missile has the advantage of low cost, but its use environment is very demanding, generally in clear skies. General smog days have a great im...

AI Technical Summary

Problems solved by technology

[0003] The main problems in the design of the existing TV terminal guidance seeker imaging system are: first, the requirements for the use environment are relatively strict, and the basic requirement is that the weather visibility is greater than or equal to the strike distance, and it is limited to daytime use, and the more expensive ones are used at night. Staring infrared imaging seeker replaces

At present, the near-infrared technology is only tried to be used in the photoelectric imaging system on the ground. It is mainly used to fight against foggy and dusty weather and improve the visibility by about 1.5 times. There is no technical report on the seeker at home and abroad.

At the same time, 1 / 2 or 1 / 3 inch detectors are generally used, and the requirements for imaging quality are generally easy to assemble and realize

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