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Zoom Optical System

An optical system and zoom technology, applied in optics, optical components, instruments, etc., can solve the problems of extremely high imaging capability and large size, and achieve the effect of compact optical system, small size and good performance

Active Publication Date: 2021-04-23
JIAXING ZHONGRUN OPTICAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] 4K ultra-high-definition (eight megapixels) camera technology has gone deep into the stage of widespread promotion from a concept, but the 4K resolution requires extremely high imaging capabilities of the lens, so the size of a lens with a common structure cannot be avoided. , 4-megapixel lens is much larger

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0045] Such as figure 1As shown, it is a schematic cross-sectional view of the wide-angle end, intermediate magnification, and telephoto end of the zoom optical system of this embodiment. The zoom optical system is arranged sequentially from the object plane side to the image plane side, including the first fixed lens group with positive power, the main zoom lens group with negative power, diaphragm, and The positive second fixed lens group, the focusing lens group with negative refractive power, and the auxiliary zoom lens group with positive refractive power, wherein: the first fixed lens group and the second fixed lens group are always in a fixed state, through The main zoom lens group moves from the object side to the image side along the optical axis as the main zoom group, and the auxiliary zoom lens group corresponds to the position of the main zoom lens group and moves from the object side to the image side along the optical axis , so that the field of view of the len...

Embodiment 2

[0075] Such as image 3 As shown, it is a schematic cross-sectional view of the wide-angle end, intermediate magnification, and telephoto end of the zoom optical system of this embodiment. Compared with Embodiment 1, in this embodiment, the second lens A2 of the first fixed lens group A is a spherical lens with positive convex and concave refractive power, and the auxiliary zoom lens group E is the thirteenth lens E1. Specifically, it is a biconvex aspheric mirror with positive refractive power.

[0076] The specific settings of the zoom optical system in the present embodiment are as follows:

[0077] Wide-angle end focal length f W =6.05mm, telephoto end focal length f T =118.4mm; wide-angle end aperture number FNO W=1.51, the aperture number FNO at the telephoto end T =4.03; wide-angle end half field of view ω W =40.0°, telephoto end half field of view ω T =2.19°; the total optical length of the optical system (that is, the distance from the center apex of the front ...

Embodiment 3

[0097] Such as Figure 5 , which is a schematic cross-sectional view of the wide-angle end, intermediate magnification, and telephoto end of the zoom optical system of this embodiment. Compared with Embodiment 1, in this embodiment, after the seventh lens B3 of the main variable power lens group B, a spherical lens B4 with negative front concave and back convex power is further added.

[0098] The specific settings of the zoom optical system in the present embodiment are as follows:

[0099] Wide-angle end focal length f W =6.52mm, telephoto focal length f T =124.0mm; wide-angle end aperture number FNO W =1.60, the aperture number FNO at the telephoto end T =4.31; wide-angle end half field of view ω W =36.3°, telephoto end half field of view ω T =2.05°; the total optical length of the optical system (that is, the distance from the center apex of the front surface of the first lens to the image plane) TTL=94.7mm.

[0100]

[0101]

[0102] The corresponding cone co...

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Abstract

A variable focal length optical system, comprising in sequence from the object plane side to the image plane side: a first fixed lens group with positive refractive power, a main zoom lens group with negative refractive power, a diaphragm, and a second fixed lens with positive refractive power group, focusing lens group with negative refractive power, auxiliary zoom lens group and imaging surface with positive refractive power, the positions of the auxiliary zoom lens group and the main zoom lens group are in one-to-one correspondence and along the optical axis from the object side to the image surface side Move, so that the field of view of the lens is zoomed from the wide-angle end to the telephoto end, and the focusing lens group moves along the optical axis corresponding to the position of the main zoom lens group, imaging wavelength, temperature, and imaging object distance. The zoom is used to correct and adjust the focus, so that the image can be stabilized on the imaging surface during the change of the focal length. While realizing 4K resolution, large aperture and infrared confocal, the present invention greatly shortens the total length of the optical system, has a more compact structure, and is beneficial to the popularization of 4K photography.

Description

technical field [0001] The invention relates to a technology in the field of optical equipment, in particular to a 1 / 1.8" target zoom optical system with three groups of linkages supporting eight million pixels. Background technique [0002] 4K ultra-high-definition (eight megapixels) camera technology has gone from a concept to a stage of widespread promotion, but the 4K resolution requires extremely high imaging capabilities of the lens, so the size of a lens with a common structure cannot be avoided. , The 4-megapixel lens is much larger. How to achieve a substantial increase in resolution while keeping the size and volume of the lens comparable to the original lens is a technical problem that the optical system needs to solve urgently. Contents of the invention [0003] The present invention proposes a variable focal length optical system aiming at the above-mentioned deficiencies existing in the prior art. [0004] The present invention is achieved through the follo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B15/16
CPCG02B15/16
Inventor 葛航笠江秉儒盛亚茗尚洁阳
Owner JIAXING ZHONGRUN OPTICAL TECH
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