An underwater film zoom optical system

An optical system and film technology, applied in optics, optical components, instruments, etc., can solve problems such as lack of film imaging function and small zoom ratio, achieve excellent focusing and follow-focus performance, improve modularization level, and breathe effect excellent effect

Active Publication Date: 2021-07-27
XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] In order to solve the technical problems of the existing underwater zoom movie lens optical system, either the zoom ratio is small or the movie imaging function is not available, the invention provides an underwater movie zoom optical system

Method used

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  • An underwater film zoom optical system
  • An underwater film zoom optical system
  • An underwater film zoom optical system

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Embodiment Construction

[0082] The content of the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0083] Such as figure 1 As shown, an underwater movie zoom optical system defines light incident from left to right, and the optical system includes a window 12 coaxially arranged in sequence from left to right along the optical axis, a front fixed mirror group 11, a focusing mirror Group 10, front fixed lens group 2 9, zoom lens group 8, compensation lens group 7, diaphragm 6, middle fixed lens group 5, aberration stabilization lens group 4, rear fixed lens group 3 and filter 2, window The left side of 12 is the object plane 13 of optical system, and the right side of optical filter 2 is the focal plane 1 of optical system; 29. The compensating mirror group 7, the middle fixed mirror group 5, the aberration-stabilizing mirror group 4, and the rear fixed mirror group 3 together constitute a complete imaging system.

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Abstract

The invention provides an underwater movie zoom optical system, which solves the problem that the existing underwater zoom movie optical system either has a small zoom ratio or does not have a movie imaging function. The system includes a window, a front fixed mirror group one, a second glued mirror group, a front fixed mirror group two, a third glued mirror group, a compensating mirror group, a diaphragm, a middle fixed mirror group, a tenth positive Lens, rear fixed mirror group and filter; front fixed mirror group one includes first negative lens, first cemented mirror group and second positive lens; front fixed mirror group two includes fourth positive lens and fifth positive lens; variable The multiplier lens group includes the sixth positive lens, the fourth negative lens and the fifth negative lens; the middle fixed lens group includes the eighth positive lens, the ninth positive lens and the seventh negative lens; the rear fixed lens group includes the fourth cemented lens group, The ninth negative lens and the twelfth positive lens; the variable magnification lens group, the compensation lens group and the aberration stabilization lens group move along the optical axis to realize continuous zooming; the focusing lens group realizes focusing and following focus during the zooming process.

Description

technical field [0001] The invention relates to an underwater imaging optical system, in particular to an underwater movie zoom optical system suitable for underwater movie imaging and adapted to a high-resolution image sensor. Background technique [0002] In recent years, industries such as underwater TV and film, geological survey, resource exploration, environmental monitoring, and photogrammetry have put forward urgent demands for the development of underwater film zoom lenses. [0003] Different from the photographic zoom lens, the par-focus performance, follow-focus performance and breathing performance of the lens are the three main performances of the movie zoom lens. For the same object distance, the movie zoom lens has parfocal requirements, that is, when the movie zoom lens is zoomed, the focus is always maintained, and the image is always clear; The process is precise and controllable to ensure the accuracy of focus to the greatest extent; in addition, for film...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B15/15G02B15/14G02B7/10
CPCG02B7/10G02B15/15G02B15/146
Inventor 曲锐武力彭建伟曹剑中
Owner XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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