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Large-view-field low-distortion lens

A large field of view and lens technology, applied in the field of fixed-focus lenses, can solve the problems of large distortion and stray halo of large field of view lenses, achieve large field of view and low distortion imaging, eliminate the influence of vacuum environment, and prevent the influence of stray light. Effect

Pending Publication Date: 2020-07-28
XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the technical problems of large distortion and serious stray halo in the existing large field of view lens, and provide a large field of view low distortion lens with large field of view, small distortion and good imaging quality, which has High ground and space environment adaptability

Method used

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Embodiment Construction

[0044] The present invention will be further described below in conjunction with accompanying drawing.

[0045] Such as figure 1 As shown, it is a schematic structural diagram of the large-field-of-view low-distortion lens of the present invention. The lens includes 11 lenses, 3 aspherical lenses in the 11 lenses, and two cemented lens groups, and adopts anti-telephoto matching improved double Gauss structure. Specifically, it includes a first negative lens 1, a second negative lens 2, a third negative lens 3, a fourth negative lens 4, a fifth positive lens 5, a sixth positive lens 6, The seventh doubled lens group 7, the eighth positive lens 8, and the ninth doubled lens group 9, wherein the first negative lens 1, the second negative lens 2 and the third negative lens 3 constitute the reverse telephoto lens group, the fourth negative lens 4 and the fifth positive lens 5 constitute the first half of the improved double Gauss mirror group, the sixth positive lens 6 and the se...

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Abstract

The invention relates to a prime lens, in particular to a large-view-field low-distortion lens which can be applied to space and ground imaging. The invention aims to solve the technical problems of large distortion and serious stray halo of an existing large-view-field lens, provides a large-view-field low-distortion lens which is large in view field angle, small in distortion and good in imagingquality, and has high ground and space environment adaptability. The lens comprises a second negative lens, a third negative lens, a fourth negative lens, a fifth positive lens, a sixth positive lens, a seventh cemented lens group, an eighth positive lens and a ninth cemented lens group which are sequentially and coaxially arranged in the incident direction of light. The second negative lens andthe third negative lens form a reverse telephoto lens group, the fourth negative lens and the fifth positive lens form the front half part of the improved double-Gaussian lens group, the sixth positive lens and the seventh cemented lens group form the rear half part of the improved double-Gaussian lens group, and the eighth positive lens and the ninth cemented lens group form an emergent lens group. The fourth negative lens adopts an aspheric lens.

Description

technical field [0001] The invention relates to a fixed-focus lens, in particular to a large-field-of-view low-distortion lens, which can be applied to space and ground imaging. Background technique [0002] For large field of view lenses, whether they are used in space or on the ground, the main problems are large distortion and serious stray halos. When they are used in surveillance scenes, they are not easy to observe. If post-correction is performed, it will Lost some field of view. [0003] In addition, with the development of space exploration, the demand for optical imaging lenses suitable for space exploration is increasing, and the types are also increasing. At present, there are two main problems with large field of view lenses used in space: [0004] First, it is difficult to design the heat dissipation difference and the influence of the vacuum environment. Due to the complex space environment, compared with the ground environment, there is not only a large te...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B13/00G02B13/06G02B13/18G02B1/00
CPCG02B13/0015G02B13/0045G02B13/006G02B13/06G02B1/00
Inventor 梅超费嘉祺闫阿奇曲锐马迎军
Owner XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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