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High-magnification zoom movie lens

A large magnification and lens technology, applied in the lens field, can solve the problems of high cost and large size of large magnification zoom lens, achieve good tolerance performance, increase zoom factor, and good imaging effect

Pending Publication Date: 2020-06-16
SHENZHEN DONGZHENG OPTICAL TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention proposes a large magnification zoom movie lens, which solves the problems of large volume and high cost of the large magnification zoom lens in the prior art

Method used

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Embodiment Construction

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0029] Such as Figure 1-Figure 8 As shown, the present invention proposes a large-magnification zoom cine lens, which includes a front fixed lens group, a zoom lens group, a compensation lens group and a rear fixed lens group arranged sequentially along the optical axis from the object side to the image side. The fixed lens group includes a negative lens and a plurality of continuous positive lenses, the variable magnification lens group is composed of lenses with...

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Abstract

The invention discloses a high-magnification zoom movie lens. The movie lens comprises a front fixed lens group, a zoom lens group, a compensation lens group and a rear fixed lens group which are sequentially arranged from an object side to an image side along an optical axis, wherein the front fixed lens group comprises a negative lens and a plurality of continuous positive lenses, the zoom lensgroup is composed of lenses with negative overall focal power, and the compensation lens group is composed of lenses with positive overall focal power. The front fixed lens group comprises a negativelens and a plurality of continuous positive lenses, and can slowly transit light break angles, so that the whole system has better tolerance performance, and the cost control is facilitated; the zoomlens group has a system zoom function, the overall focal power of the zoom group is negative, the zoom magnification is improved, and the compensation group is used for compensating image plane position change, namely back focus movement amount change, caused by movement of the zoom group. The overall focal power of the compensation group is positive, and the imaging effect is good.

Description

technical field [0001] The invention relates to the field of lens technology, in particular to a large-magnification zoom movie lens. Background technique [0002] In film and television equipment, there is a gap in the production and design of domestic film lenses. With the development of film and television technology and the improvement of people's living standards, the number of fans increases, and the demand for this aspect also increases. Among the existing movie lens designs, the high-magnification zoom lenses produced by manufacturers such as Angenieux, Fujinon, and Canon have always been in a monopoly position. There are many aspherical lenses, expensive, and low cost performance. It is a heavy burden for ordinary TV and video fans. economic burden. Contents of the invention [0003] The invention proposes a large-magnification zoom cine lens, which solves the problems of large volume and high cost of the large-magnification zoom lens in the prior art. [0004] ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B15/16G02B13/00
CPCG02B15/16G02B13/005G02B13/009
Inventor 叶波杨志全徐毅
Owner SHENZHEN DONGZHENG OPTICAL TECH CO LTD
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