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Athermalization high-resolution prime lens

A fixed-focus lens, high-resolution technology, used in optical components, optics, instruments, etc., can solve problems such as low pixels, complex structure, and inability to work normally, to control distortion and chromatic aberration, overcome low image quality, and simple structure. Effect

Pending Publication Date: 2018-08-24
JIAXING ZHONGRUN OPTICAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] As people's requirements for image capture and recording are getting higher and higher, and the occasions of use are becoming more and more extensive, some fixed-focus lenses with complex structures and bulky sizes can no longer meet the needs, while simple small-size fixed-focus lenses often have pixels If it is too low, it cannot work normally in an extremely high or low temperature environment, cannot adapt to various use environments, and cannot meet people's pursuit of image quality

Method used

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  • Athermalization high-resolution prime lens

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Such as figure 1 As shown, the present embodiment includes in sequence from the object side to the image side: a front group lens G1 with negative refractive power, a stop STP, a rear group lens G2 with positive refractive power, and an imaging surface IMG.

[0039] The front group lens G1 includes in sequence: a first lens group L1, a second lens L2 with negative refractive power, and a third lens L3 with positive refractive power.

[0040] The first lens group L1 is a first lens with negative refractive power.

[0041] The rear lens group G2 includes in turn: a fourth lens L4 with positive power, a fifth lens L5 with positive power, a sixth lens L6 with negative power, and a seventh lens L7 with positive power .

[0042] The first lens group L1, the second lens L2 and the sixth lens L6 are concave lenses; the third to fifth lenses L3-L5 and the seventh lens L7 are convex lenses.

[0043] Various numerical data related to this embodiment are shown below.

[0044] F...

Embodiment 2

[0056] Such as Figure 4 As shown, compared with Embodiment 1, the rear group lens G2 of this embodiment sequentially includes: the fourth lens L4 with positive refractive power, the fifth lens L5 with positive refractive power, and the sixth lens with negative refractive power L6 and a seventh lens L7 with positive power.

[0057] The fifth lens L5 is a cemented lens, including a first front lens L51 and a first rear lens L52.

[0058] Various numerical data related to this embodiment are shown below.

[0059] Focal length F=6mm; relative aperture FNO=2.1mm; field of view FOV=66.5°.

[0060] Table 3 Lens structure parameters of this embodiment

[0061]

[0062]

[0063] The fifth lens L5 in this embodiment is a doublet lens, and the second surface of the first front lens L51 is the first surface of the first rear lens L52.

[0064] Table 4 is the lens aspheric coefficient of the present embodiment

[0065] Surface serial number

K

A4

B6

C8

D...

Embodiment 3

[0069] Such as Figure 7 As shown, compared with Embodiment 2, the front group lens G1 of this embodiment sequentially includes: a first lens group L1, a second lens L2 with negative refractive power, and a third lens L3 with positive refractive power.

[0070] The first lens group L1 includes two lenses, which are the second front lens L11 with positive refractive power and the second rear lens L12 with negative refractive power.

[0071] Various numerical data related to this embodiment are shown below.

[0072] Focal length F=5.8mm; relative aperture FNO=1.8mm; field of view FOV=66.5°.

[0073] Table 5 Lens structure parameters of this embodiment

[0074]

[0075]

[0076] The fifth lens L5 in this embodiment is a doublet lens, and the second surface of the first front lens L51 is the first surface of the first rear lens L52.

[0077] Table 6 is the lens aspheric coefficient of the present embodiment

[0078] Surface serial number

K

A4

B6

C8 ...

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Abstract

The invention discloses an athermalization high-resolution prime lens which, from the object side to the image side, sequentially comprises: a pre-group lens with negative focal power, a diaphragm, apost-group lens with positive focal power, and an imaging plane, wherein the pre-group lens sequentially comprises a first battery of lenses, a second lens with negative focal power, and a third lenswith positive focal power; the post-group lens sequentially comprises a fourth lens with positive focal power, a fifth lens with positive focal power, a sixth lens with negative focal power, and a seventh lens with positive focal power. According to the athermalization high-resolution prime lens disclosed by the invention, a small high-image-quality athermalization prime lens is designed by reasonably combining spherical surface and non-spherical surface, and has the advantages of simple structure and low cost, and overcomes the defect of low image quality of existing simple-structure lens, and perfectly controls distortion and chromatic aberration in the whole field of view.

Description

technical field [0001] The invention relates to a technology in the field of optical imaging, in particular to an athermalized high-resolution fixed-focus lens with a focal length of 5.8-6.2 mm. Background technique [0002] As people's requirements for image capture and recording are getting higher and higher, and the occasions of use are becoming more and more extensive, some fixed-focus lenses with complex structures and bulky sizes can no longer meet the needs, while simple small-size fixed-focus lenses often have pixels If it is too low, it cannot work normally in extreme high or low temperature environments, cannot adapt to various usage environments, and cannot satisfy people's pursuit of image quality. While pursuing a wide range of use, the lens needs to meet the performance requirements of high image quality and small size. The development of such a new type of fixed-focus lens has become an urgent problem in the industry. Contents of the invention [0003] Aimi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B13/00G02B13/18
CPCG02B13/0045G02B13/18
Inventor 胡侃杰盛亚茗尚洁阳
Owner JIAXING ZHONGRUN OPTICAL TECH
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