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Ultra-wide-angle optical imaging system and optical equipment

An optical imaging system and ultra-wide-angle technology, applied in optics, optical components, instruments, etc., can solve the problems of expensive lenses and vacant focal lengths, reduce purple fringing or dispersion, reduce weight, and facilitate fast focusing Effect

Pending Publication Date: 2021-02-12
深圳市雷影光电科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are still gaps in the range of focal lengths of the original supporting lenses that can be used on half-frame mirrorless cameras, especially the wide-angle focal lengths, and some focal lengths are expensive, which is not acceptable to all photography consumers

Method used

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  • Ultra-wide-angle optical imaging system and optical equipment
  • Ultra-wide-angle optical imaging system and optical equipment
  • Ultra-wide-angle optical imaging system and optical equipment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0085] figure 1 Shown is a schematic structural view of the ultra-wide-angle optical imaging system in Embodiment 1. In Embodiment 1, the first lens group G1 includes a first lens L11 with negative refractive power and a lens with negative refractive power arranged in sequence. The second lens L12, the third lens L13 with negative refractive power, the fourth lens L14 with positive refractive power, and the fifth lens L15 with negative refractive power, the fifth lens L15 is about a wavelength of 587.6nm A low dispersion lens with an Abbe number higher than 70.

[0086] The numerical data of described ultra-wide-angle optical imaging system is shown in Table 1, Table 2 and Table 3:

[0087] Table 1

[0088]

[0089]

[0090] Table 2

[0091]

[0092]

[0093] table 3

[0094]

[0095] Wherein, the surface number represents the surface number of each lens from the object side to the image side;

[0096] In Example 1, the object-side surfaces and image-side s...

Embodiment 2

[0105] Figure 8 Shown is a schematic structural view of the ultra-wide-angle optical imaging system of Embodiment 2. In Embodiment 2, the first lens group G1 includes a first lens L11 with negative refractive power, a lens with negative refractive power, and The second lens L12, the third lens L13 with negative power, and the fourth lens L14 with positive power, the fourth lens group G4 also includes a fifteenth lens L53 with positive power, the tenth The pentalens L53 is disposed on the side of the fourteenth lens L52 away from the object side. Hereinafter, Table 4, Table 5 and Table 6 show various numerical data about the ultra-wide-angle optical imaging system of this embodiment.

[0106] Table 4

[0107]

[0108]

[0109]

[0110] table 5

[0111]

[0112] Table 6

[0113]

[0114] Figure 9-10 Showing the spherical aberration diagram of embodiment 2 at infinity focus and closest focus, Figure 11-14 It shows the curves of curvature of field and distort...

Embodiment 3

[0116] Figure 15 Shown is a schematic structural view of the ultra-wide-angle optical imaging system in Embodiment 3. In Embodiment 3, the first lens group G1 includes a first lens L11 with negative refractive power and a lens with negative refractive power arranged in sequence. The second lens L12, the third lens L13 with negative refractive power, the fourth lens L14 with positive refractive power, and the fifth lens L15 with negative refractive power, the fifth lens L15 is about a wavelength of 587.6nm A low dispersion lens with an Abbe number higher than 70. Hereinafter, Table 7, Table 8 and Table 9 show various numerical data about the ultra-wide-angle optical imaging system of this embodiment.

[0117] Table 7

[0118]

[0119]

[0120] Table 8

[0121]

[0122] Table 9

[0123]

[0124] Figure 16-17 Showing the spherical aberration diagram of embodiment 3 at infinity focus and closest focus, Figure 18-21 It shows the field curvature and distortion c...

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Abstract

The invention provides an ultra-wide-angle optical imaging system and optical equipment. The ultra-wide-angle optical imaging system sequentially comprises a first lens group with negative focal power, a second lens group with positive focal power, an aperture diaphragm, a third lens group with positive focal power, a twelfth lens with negative focal power and a fourth lens group with positive focal power from an object side to an image side, in the focusing process, the twelfth lens moves towards the image side along the optical axis, and the positions of the first lens group, the second lensgroup, the third lens group and the fourth lens group relative to the image plane remain unchanged. The first lens group satisfies the following conditional expressions: -2.8 < = F1 / F < = 1.3, (1); the second lens group satisfies the following conditional expressions: 1.8 < = F2 / F < = 2.6, (2). The invention further provides optical equipment provided with the ultra-wide-angle optical imaging system. The focusing assembly of the imaging system is composed of only one lens, so that the weight of the focusing assembly and the total weight of the optical imaging system are reduced, and meanwhile, quick focusing of the optical imaging system and imaging equipment is facilitated.

Description

technical field [0001] The invention relates to the technical field of optical imaging, in particular to an ultra-wide-angle optical imaging system and optical equipment. Background technique [0002] In recent years, in the photography market, thanks to the high performance and portability of mirrorless cameras, the number of users has been increasing, and there are also diverse demands for various shooting scenes. There are still gaps in the range of focal lengths of the original supporting lenses that can be used on half-frame mirrorless cameras, especially the wide-angle focal lengths, and lenses with some focal lengths are expensive, and not all photography consumers can accept them. Mirrorless camera lenses are the same as SLR camera lenses. Consumers expect them to have high performance and high cost performance. In addition, mirrorless cameras are small in size, and consumers also hope that the size of their supporting lenses is as small as possible compared with SL...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B13/06G02B13/00G02B13/18
CPCG02B13/00G02B13/06G02B13/18
Inventor 刘瑞军陈宝锋
Owner 深圳市雷影光电科技有限公司
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