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Light and small continuous zooming optical lens

An optical lens and lens technology, applied in optics, optical components, instruments, etc., can solve the problems of complex structure, long optical lens, difficult to carry, too long focal length, etc., and achieve small size, excellent image quality, and high zoom ratio Effect

Active Publication Date: 2022-01-21
TIANJIN JINHANG INST OF TECH PHYSICS
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Problems solved by technology

At present, many infrared continuous zoom optical systems with large zoom ratios have too long focal lengths or the use of straight lens barrels makes the optical lenses too long to be carried easily, or the design of folding lens barrels leads to complicated structures.

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  • Light and small continuous zooming optical lens
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  • Light and small continuous zooming optical lens

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Embodiment Construction

[0030] The application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain related inventions, rather than to limit the invention. In addition, it should be noted that, for the convenience of description, only the parts related to the invention are shown in the drawings, and the embodiments in the present application and the features in the embodiments can be combined without conflict.

[0031] A preferred embodiment of the present invention will be further described below in conjunction with accompanying drawing, as figure 1 , figure 2 The shown light and miniaturized continuous zoom optical lens includes first lens 1, second lens 2, third lens 3, fourth lens 4, fifth lens 5, Sixth lens 6 , seventh lens 7 , detector assembly 8 .

[0032] Specifically, the first lens 1 is a meniscus-shaped silicon crystal lens that is convex to ...

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Abstract

The invention provides a light and small continuous zooming optical lens. Seven lenses which are made of different materials and have different specifications are adopted and matched with a detector assembly, large-zoom-ratio continuous zooming within the focal length of 18-290 mm is realized within the total length of 70 mm of the lens under the conditions that the working wave band is 3.7-4.8 microns, the fixed F number is 5.5 and the temperature is -40 DEG C to +60 DEG C, the maximum distortion of a full view field is less than or equal to 4.9%, the zooming movement track is smooth, and the optical lens is stable in image quality, excellent in image quality, smaller in size and lighter in weight in the optical lens with the same size and the same performance index. The total length of the medium-wave infrared continuous zooming optical lens is smaller than one fourth of a long focal length value, and the medium-wave infrared continuous zooming optical lens is simple in structure, high in zoom ratio, convenient to carry and capable of being widely applied to various fields of civil use and military use.

Description

technical field [0001] The invention belongs to the technical field of optical system design and relates to a light and miniaturized continuous zoom optical lens. Background technique [0002] The continuous zoom optical system can not only meet the requirements of large field of view search and small field of view tracking and aiming, but also solve the defect that two or more gears of lenses lose sight of fast-moving targets in a short period of time due to field of view switching. Compared with the passive imaging of the visible light system, infrared imaging is an active imaging, which has the advantages of good concealment, strong anti-interference ability, and good environmental adaptability. It is more difficult to design a large zoom ratio infrared continuous zoom optical system. [0003] In the literature on the infrared continuous zoom optical system, relevant scholars have proposed a method for calculating the initial structure of the continuous zoom optical syst...

Claims

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Application Information

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IPC IPC(8): G02B15/16G02B15/14
CPCG02B15/16G02B15/146
Inventor 林晶李晓辰张冰锐雷丽李景陶玉张晨钟
Owner TIANJIN JINHANG INST OF TECH PHYSICS
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