Underwater large-field-of-view continuous zooming optical system

An optical system and large field of view technology, applied in optics, optical components, instruments, etc., can solve the problems of complex system structure, large system volume, small field of view, etc., and achieve small volume, small change of center of mass, and small total number Effect

Active Publication Date: 2019-08-09
XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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  • Abstract
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Problems solved by technology

[0006] In order to solve the problems of the existing underwater continuous zoom optical system, either the field of view is small, or the zoom ratio is small, or the system volume is large, or the system structure is complex

Method used

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  • Underwater large-field-of-view continuous zooming optical system
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  • Underwater large-field-of-view continuous zooming optical system

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Embodiment Construction

[0040] The content of the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0041] Such as figure 1As shown, an underwater large field of view continuous zoom optical system includes a window 10, a front fixed mirror group 9, a variable power mirror group 8, a diaphragm 7, and a middle fixed Mirror group 6, compensating mirror group 5, aberration stabilization mirror group 4, rear fixed mirror group 3 and optical filter 2, the left side of window 10 is object plane 11, the right side of optical filter 2 is focal plane 1, variable The multiplier lens group 8 forms a complete imaging system together with the front fixed lens group 9, the middle fixed lens group 6, the compensation lens group 5, the aberration stabilization lens group 4, and the rear fixed lens group 3. The total length remains unchanged.

[0042] During the zooming process, the variable power mirror group 8, the compensation mi...

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Abstract

The invention provides an underwater large-field-of-view continuous zooming optical system, thereby solving problems of small field of view angle, small zoom ratio, small system size, and complicatedsystem structure of the existing underwater continuous zooming optical systems. The provided underwater large-field-of-view continuous zooming optical system comprises a window, a front fixed mirror group, a zooming mirror group, a diaphragm, an intermediate fixed mirror group, a compensation mirror group, an aberration stabilizing mirror group, a rear fixed mirror group, and a filter that are arranged successively and coaxially in an optical axis direction. The front fixed mirror group includes a first glue mirror group having the positive focal power and a second positive lens. The zooming mirror group includes a second negative lens and a second glue lens group having the negative focal power. The intermediate fixed lens group includes a fourth positive lens group a third glue lens group having the positive focal power. The compensation mirror group includes a fifth negative lens and a sixth negative lens. The aberration stabilizing mirror group includes a sixth positive lens. And the rear fixed mirror group includes a seventh positive lens, a seventh negative lens, and an eighth positive lens. The zooming mirror group, the compensation mirror group, and the aberration stabilizing mirror group can move linearly back and forth in an optical axis direction.

Description

technical field [0001] The invention relates to an underwater imaging optical system. In particular, it relates to an underwater large field of view continuous zoom optical system with large zoom ratio, compact volume and adapted to a high-resolution image sensor. Background technique [0002] In recent years, optical imaging technology suitable for application requirements such as underwater geological survey, underwater resource exploration, underwater environment monitoring, and underwater photogrammetry has received great attention. However, the optical properties of water medium are different from that of air. Water shows strong absorption of light in various spectral bands, and the suspended particles in water will cause scattering effect and reduce the contrast of the target image. Moreover, the general underwater imaging system separates the object space in the water medium and the image space in the air medium (or other pure gas medium) through an optical window. W...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B15/173G02B15/163
CPCG02B15/163G02B15/173
Inventor 曲锐武力杨洪涛杨明洋彭建伟
Owner XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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