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Large-caliber refractive and reflective three-component continuous zooming optical system

An optical system and three-component technology, applied in optics, optical elements, diffraction gratings, etc., can solve the problems of complex system structure, inability to make full use of the light-gathering ability and resolution advantages of large-aperture telescope mirrors, and increased volume. , to achieve the effect of simple optical path, good aberration correction ability and long focal length

Active Publication Date: 2014-07-09
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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Problems solved by technology

[0004] The present invention solves the problems that the existing catadioptric zoom system cannot make full use of the light-gathering ability and resolution advantages of the large-diameter telescope mirror due to the structural composition of the front and rear ends, as well as the complex structure of the system and the increase in volume; it provides a large-diameter Catadioptric three-element continuous zoom optical system

Method used

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  • Large-caliber refractive and reflective three-component continuous zooming optical system
  • Large-caliber refractive and reflective three-component continuous zooming optical system
  • Large-caliber refractive and reflective three-component continuous zooming optical system

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specific Embodiment approach 1

[0016] Specific implementation mode 1. Combination Figure 1 to Figure 3 Description of this embodiment, a large-aperture catadioptric three-element continuous zoom optical system, using a secondary imaging method, the system is composed of a front-end Cassegrain reflective telescopic objective lens and a rear-end transmissive zoom system; the zoom system The three-component mechanical compensation method is adopted, which are the front fixed group 7, the compensation group 8 and the zoom group 9 in sequence. The Cassegrain telescopic objective lens at the front adopts a reflective form, which does not produce chromatic aberration, and reduces the chromatic aberration and secondary spectral correction pressure of the back-end transmission system; the light beam passes through the primary mirror 1, secondary mirror 2, and third mirror 3 in the Cassegrain telescopic objective lens in sequence And four mirrors 4, after the first image plane 5, the light beam is collimated by the ...

specific Embodiment approach 2

[0021] Specific embodiment two, combine Figure 1 to Figure 8 This implementation mode is described. This implementation mode is an example of a large-aperture catadioptric three-component continuous zoom optical system described in the first specific implementation mode:

[0022] This embodiment provides a set of catadioptric continuous zoom optical system with an aperture of 1000mm and a focal length of 2000mm to 6000mm. The working band of the system is 500nm to 800nm, relative to the aperture of 1 / 2 to 1 / 6, and its field of view is 0.33° ~0.14°.

[0023] combine figure 1 and image 3 , The system described in this embodiment is composed of a front-end Cassegrian reflective objective lens, a field lens and a rear-end zoom system. The design of the reflective objective fully considers factors such as system obscuration ratio, processing difficulty, and structural size. The primary mirror 1 has a diameter of 1000mm, a radius of curvature of 3600mm, and a paraboloid; the se...

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Abstract

The invention provides a large-caliber refractive and reflective three-component continuous zooming optical system and relates to the technical field of optical system design. The large-caliber refractive and reflective three-component continuous zooming optical system solves the problems that advantages of light concentration capacity and resolution ratio of a large-caliber telescope can not be fully utilized and the system is complex in structure, increased in size and the like due to the fact that an existing refractive and reflective zooming system is composed of a front-end structure and a rear-end structure. The large-caliber refractive and reflective three-component continuous zooming optical system is composed of a front-end reflective objective lens and a rear-end zooming system, wherein the front-end reflective objective lens is a Cassegrain telescope objective; a three-component mechanical compensation mode is adopted by the rear-end zooming system; a front fixed lens set, a compensation lens set and a zooming lens set are used in the three-component mechanical compensation mode; a light beam passes through the Cassegrain telescope objective, forms an image on a first image surface and then passes through a field lens to become a collimated light beam; the collimated light beam passes through the front fixed lens set, the compensation lens set and the zooming lens set sequentially and then forms an image on an image surface. Through the large-caliber refractive and reflective three-component continuous zooming optical system, the light concentration capacity and resolution ratio of the telescope are fully utilized, the imaging quality is good, and the system is simple in structure.

Description

technical field [0001] The invention relates to the technical field of optical system design, in particular to the design of a continuous zoom optical system for a large-aperture telescope in the visible light and near-infrared bands. Background technique [0002] Existing large-aperture telescopes include Gregorian, Cassegrain, Newtonian, Schmidt, Maksutov, etc. Cassegrain is widely used due to its compact structure and small central obscuration, making it the most commonly used form of modern large-scale special-purpose telescopes. The zoom system is divided into optical compensation and mechanical compensation according to the image plane compensation method. The optical compensation method does not meet the system requirements because the image plane cannot be fully compensated. The mechanical compensation methods are different according to the requirements of technical indicators, and there can be two groups, three groups, four groups or even five groups. Among them, t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B27/00G02B17/08G02B13/02G02B15/20
Inventor 王建立李宏壮赵勇志刘欣悦赵金宇
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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