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Full-spherical large-aperture catadioptric continuous-zooming optical system

An optical system, a catadioptric technology, used in optics, optical components, instruments, etc., can solve the problems of increasing the cost and difficulty of assembly and adjustment, and achieve the effect of shortening the manufacturing, simplifying the structure and reducing the production cost.

Active Publication Date: 2017-05-31
西安应用光学研究所
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Problems solved by technology

The adjustment of RC system depends on the use of interferometer and computer-aided adjustment technology, which greatly increases the cost and difficulty of adjustment

Method used

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  • Full-spherical large-aperture catadioptric continuous-zooming optical system

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Embodiment Construction

[0024] The present invention will be further described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0025] according to figure 1 As shown, the zoom ratio M of the spherical large-aperture catadioptric continuous zoom optical system provided by the present invention satisfies the following relationship: 2≤M≤30. The system consists of three components arranged in sequence, the front fixed group 1, the zoom group 2, and the compensation group 3. The front fixed group 1 faces the object side, and the compensation group 3 faces the image side. The front fixed group 1 including the aperture stop keeps the same position during the whole zooming process, and it includes several lenses and two reflectors, all of which are spherical in shape and positive in power. Both the zoom group 2 and the compensation group 3 are composed of lenses, and their surfaces are spherical or aspherical. The zoom group 2 and the compensation group 3 move line...

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Abstract

The invention discloses a full-spherical large-aperture catadioptric continuous-zooming optical system. The system comprises a front fixing group with an aperture diaphragm, a zooming group and a compensation group, and a zooming ratio of the system is larger than 2 and smaller than or equal to 30. The front fixing group comprises a plurality of lenses and two reflectors, and all faces are spherical. The system has advantages that non-spherical reflectors of the front fixing group of the large-aperture zooming system are omitted, processing and detection cost is greatly reduced, system tolerance requirements are lowered, and production and adjustment period shortening and difficulty lowering are realized; a rear fixing group in a normal continuous zooming system is omitted, the system is structurally simplified, the overall length of the system is decreased, production cost is reduced, production cycle is shortened, and system weight is reduced.

Description

technical field [0001] The present invention relates to the technical field of optical system design, and mainly relates to a large-aperture (150mm and above) continuous zoom optical system, in particular to a spherical large-aperture refractor with a front fixed group consisting of spherical double mirrors without a rear fixed group. Trans-type continuous zoom optical system. Background technique [0002] A continuous zoom optical system refers to an optical system in which the focal length changes continuously within a certain range, while the image plane remains unchanged or basically unchanged. The continuous zoom optical system is generally divided into optical compensation type and mechanical compensation type. Among them, the optical compensation image plane has defocus, and the image quality is not good. [0003] The zoom system for field use needs to image long-distance moving targets, so a large-aperture (150mm and above) continuous zoom system is used. If a len...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B15/15
CPCG02B15/15
Inventor 李元何玉兰王楠茜周晓斌李明星肖相国常伟军康文莉
Owner 西安应用光学研究所
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