Movie lens and image pickup device

A lens and film technology, applied in the optical field, can solve the problems of reducing imaging brightness, image quality color reproduction, relative illumination, increasing the imaging quality of film lenses, and difficult to detect film lenses, so as to achieve the effect of increasing imaging quality.

Active Publication Date: 2021-09-07
JIAXING ZHONGRUN OPTICAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention will solve the existing technical problems and provide a cine lens and image pickup device, which reduces the brightness, imaging quality, color reproduction and relative illuminance of imaging at each focal length, making it difficult for the cine lens to be noticed during the zooming process , which increases the imaging quality of cine lenses

Method used

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  • Movie lens and image pickup device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] A kind of film lens, described film lens comprises the first lens group G1 of positive refractive power, the second lens group G2 of negative refractive power, diaphragm STO, the third lens group of positive refractive power successively from object plane side to image plane side Lens group G3, fourth lens group G4 with negative refractive power, and fixed lens group G5 with positive refractive power;

[0047] The first lens group G1, the second lens group G2, the third lens group G3 and the fourth lens group G4 move along the optical axis direction of the movie lens;

[0048] The first lens group G1 is sequentially composed of a first lens L1 with negative refractive power, a second lens L2 with positive refractive power, and a third lens L3 with positive refractive power from the object plane side to the image plane side;

[0049] The second lens group G2 is composed of four lenses or five lenses, and the second lens group G2 includes a fourth lens L4 with negative re...

Embodiment 2

[0082] A kind of film lens, described film lens comprises the first lens group G1 of positive refractive power, the second lens group G2 of negative refractive power, diaphragm STO, the third lens group of positive refractive power successively from object plane side to image plane side Lens group G3, fourth lens group G4 with negative power, fixed lens group G5 with positive power, and auxiliary component G6.

[0083] The first lens group G1 , the second lens group G2 , the third lens group G3 and the fourth lens group G4 move along the optical axis of the cine lens.

[0084] The first lens group G1 is sequentially composed of a first lens L1 with negative refractive power, a second lens L2 with positive refractive power, and a third lens L3 with positive refractive power from the object plane side to the image plane side.

[0085] The second lens group G2 is sequentially composed of a fourth lens L4 with negative refractive power, a fifth lens L5 with negative refractive pow...

Embodiment 3

[0116] A kind of film lens, described film lens comprises the first lens group G1 of positive refractive power, the second lens group G2 of negative refractive power, diaphragm STO, the third lens group of positive refractive power successively from object plane side to image plane side Lens group G3, fourth lens group G4 with negative power, fixed lens group G5 with positive power, and auxiliary component G6.

[0117] The first lens group G1 , the second lens group G2 , the third lens group G3 and the fourth lens group G4 move along the optical axis of the cine lens.

[0118] The first lens group G1 is sequentially composed of a first lens L1 with negative refractive power, a second lens L2 with positive refractive power, and a third lens L3 with positive refractive power from the object plane side to the image plane side.

[0119] The second lens group G2 consists of the fourth lens L4 with negative refractive power, the fifth lens L5 with negative refractive power, the sixt...

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Abstract

The invention relates to the field of optics, in particular to a movie lens and an image pickup device. The movie lens sequentially comprises a first lens group with positive focal power, a second lens group with negative focal power, a diaphragm, a third lens group with positive focal power, a fourth lens group with negative focal power and a fixed lens group with positive focal power from an object plane side to an image plane side. The first lens group, the second lens group, the third lens group and the fourth lens group move along the optical axis direction of the movie lens. Through the arrangement of the structure, the zooming function of the movie lens is realized, and in the zooming process, the imaging brightness, the imaging quality, the color rendition and the relative illuminance under each focal length are reduced, so that the movie lens is difficult to perceive in the zooming process, and the imaging quality of the movie lens is improved.

Description

technical field [0001] The invention relates to the field of optics, in particular to a movie lens and an image pickup device. Background technique [0002] Cine lenses refer to lenses specially designed and manufactured for shooting movies, videos, etc. Due to the needs of shooting technology and film art, the film and television industry has completely different requirements for lenses. It is impossible to turn an ordinary camera lens into a film lens by installing a focusing gear ring or transforming it into a stepless aperture. It is precisely because of the above particularities that cine lenses have high-level optical quality and excellent structural performance tailored for the film industry, and the design of the lens becomes difficult because these factors must be considered. [0003] Since movie shooting scenes are often complex and diverse, the photography team usually needs to prepare a series of interchangeable fixed-focus movie lenses with different focal leng...

Claims

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Application Information

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IPC IPC(8): G02B15/14G02B13/18
CPCG02B15/145121G02B13/18
Inventor 厉冰川张云涛
Owner JIAXING ZHONGRUN OPTICAL TECH
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