CN112684596B

CN112684596B - Digital micro single camera super large aperture M4/3 picture lens with effective focal length of 17mm and relative aperture F =0.95

Info

Publication number: CN112684596B
Application number: CN202110007463.0A
Authority: CN
Inventors: 徐中一; 张晓峰; 孙德刚; 左冠楠; 谷英鸿; 董彬彬
Original assignee: Shenyang Zhongyi Optical Technology Co ltd
Current assignee: Shenyang Zhongyi Optical Technology Co ltd
Priority date: 2021-01-05
Filing date: 2021-01-05
Publication date: 2022-08-09
Anticipated expiration: 2041-01-05
Also published as: CN112684596A

Abstract

The invention relates to a digital micro single camera lens, in particular to a digital micro single camera super-large diaphragm M4/3 picture-drawing lens with an effective focal length of 17mm and a relative aperture F of 0.95, which sequentially comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, a ninth lens, a tenth lens, an eleventh lens and a twelfth lens from the object side; the first lens to the twelfth lens are all made of glass materials. The digital camera M4/3 frame lens has the advantages that: the light ring is oversized, the appearance is exquisite, the cost performance is high, compared with the prior art, the lenses are all made of glass materials, the quality of the lenses and the definition of the lens are improved, and the use performance of the lens is improved.

Description

Digital micro single camera super large aperture M4/3 picture lens with effective focal length of 17mm and relative aperture F =0.95

Technical Field

The invention relates to a digital micro single camera lens, in particular to a digital micro single camera lens with an effective focal length of 17mm and a relative aperture F equal to 0.95 and an ultra-large diaphragm M4/3 picture.

Background

In digital camera equipment, a blank exists in the production design of a domestic lens. The number of the domestic enthusiasts is large, and the demand is large. However, the matched lens is high in price and low in cost performance, and is a heavy burden for the economy of general photography enthusiasts.

Disclosure of Invention

In view of the above-mentioned shortcomings in the prior art, the present invention provides a large diaphragm M4/3 frame lens with high imaging quality and high cost performance, and the compact size of the diaphragm M4/3 frame lens is 17mm in effective focal length and 0.95 in relative aperture F. The invention provides a digital micro single camera super large aperture M4/3 picture lens with an effective focal length of 17mm and a relative aperture F of 0.95, which sequentially comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, a ninth lens, a tenth lens, an eleventh lens and a twelfth lens from an object space;

the first lens is a convex object-side spherical negative lens and comprises a convex first spherical surface and a concave second spherical surface,

the second lens is a convex object-side spherical positive lens and comprises a convex third spherical surface and a convex fourth spherical surface,

the third lens is a convex object-side spherical positive lens and comprises a convex fifth spherical surface and a concave sixth spherical surface,

the fourth lens is a convex object-side spherical negative lens and comprises a convex seventh spherical surface and a concave eighth spherical surface,

the fifth lens is a concave object-side spherical negative lens and comprises a concave ninth spherical surface and a concave tenth spherical surface, the tenth spherical surface is connected with the eleventh spherical surface by gluing,

the sixth lens is a convex object-side spherical positive lens and comprises a convex eleventh spherical surface and a convex twelfth spherical surface,

the seventh lens is a convex object-side spherical positive lens and comprises a convex thirteenth spherical surface and a convex fourteenth spherical surface,

the eighth lens is a convex object-side spherical positive lens and comprises a convex fifteenth spherical surface and a convex sixteenth spherical surface, the sixteenth spherical surface is connected with the seventeenth spherical surface by gluing,

the ninth lens is a concave object-side spherical negative lens and comprises a concave seventeenth spherical surface and a concave eighteenth spherical surface,

the tenth lens is a convex object-side spherical positive lens and comprises a convex nineteenth spherical surface and a convex twenty-second spherical surface,

the eleventh lens is a convex object-side spherical positive lens and comprises a convex twenty-first spherical surface and a convex twenty-second spherical surface which are connected by gluing,

the twelfth lens is a concave object-side spherical negative lens and comprises a concave twenty-third spherical surface and a concave twenty-fourth spherical surface, and the first lens to the twelfth lens are all made of glass materials.

The lens parameters are as follows,

the invention has the advantages that: the lenses are designed to correct various aberrations by using spherical surfaces. The lenses are all made of glass materials, so that the quality of the lenses is improved, the definition of the lens is improved, and the use performance of the lens is improved.

Drawings

FIG. 1 is a schematic view of the lens structure of the M4/3 lens of the digital camera of the present invention.

FIG. 2 is an MTF chart of M4/3 lens of the digital camera of the present invention.

Wherein, 1 is a first lens, 2 is a second lens, 3 is a third lens, 4 is a fourth lens, 5 is a fifth lens, 6 is a sixth lens, 7 is a seventh lens, 8 is an eighth lens, 9 is a ninth lens, 10 is a tenth lens, 11 is an eleventh lens, 12 is a twelfth lens, 13 is a diaphragm, 14 is an image plane, and 15 is a CMOS protective glass.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to fig. 1-2, the invention is a 17mmf0.95 digital micro single camera super large diaphragm M4/3 picture lens. The lens comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, a ninth lens, a tenth lens, an eleventh lens and a twelfth lens in sequence from an object side. The first lens is a convex object-side spherical negative lens comprising a first spherical surface (convex surface) and a second spherical surface (concave surface), the second lens is a convex object-side spherical positive lens comprising a third spherical surface (convex surface) and a fourth spherical surface (convex surface), the third lens is a convex object-side spherical positive lens comprising a fifth spherical surface (convex surface) and a sixth spherical surface (concave surface), the fourth lens is a convex object-side spherical negative lens comprising a seventh spherical surface (convex surface) and an eighth spherical surface (concave surface), the fifth lens is a concave object-side spherical negative lens comprising a ninth spherical surface (concave surface) and a tenth spherical surface (concave surface), the tenth spherical surface is cemented with the eleventh spherical surface, the sixth lens is a convex object-side spherical positive lens comprising an eleventh spherical surface (convex surface) and a twelfth spherical surface (convex surface), the seventh lens is a convex object-side spherical positive lens comprising a thirteenth spherical surface (convex surface) and a fourteenth spherical surface (convex surface), the eighth lens is a positive convex object-side spherical lens, including fifteenth spherical surface (convex surface) and sixteenth spherical surface (convex surface), the sixteenth spherical surface is cemented with the seventeenth spherical surface, the ninth lens is a negative concave object-side spherical surface lens, including seventeenth spherical surface (concave surface) and eighteenth spherical surface (concave surface), the tenth lens is a positive convex object-side spherical surface lens, including nineteenth spherical surface (convex surface) and twenty-second spherical surface (convex surface), the eleventh lens is a positive convex object-side spherical surface lens, including twenty-first spherical surface (convex surface) and twenty-second spherical surface (convex surface), the twenty-second spherical surface is cemented with twenty-third spherical surface, the twelfth lens is a negative concave object-side spherical surface lens, including twenty-third spherical surface (concave surface) and twenty-fourth spherical surface (concave surface). The first lens to the twelfth lens are all made of glass materials.

The lens parameters are:

the digital camera lens of the present invention has an effective focal length F of 17mm and a relative aperture F of 0.95, please refer to fig. 1.

Referring to fig. 2, half of the diagonal line of the CMOS effective area is defined as the maximum image height, and in this embodiment, half of the diagonal line of the CMOS effective area is 10.80mm, and for measuring the spatial frequency of different image heights, the image height of 10.80mm, the image height of 9.50mm, the image height of 8.00mm, the image height of 6.50mm, the image height of 5.00mm, the image height of 3.50mm, the image height of 2.00mm, and the image height of 0.00mm central field of view (the center point of the CMOS) are taken. In fig. 2: F1D represents the diffraction limit curve, F1R represents the MTF curve for 0.00mm central field image height; F2T represents the MTF curve for a meridional 2.00mm image height, F2R represents the MTF curve for an arc loss 2.00mm image height; F3T represents the MTF curve for a 3.50mm image height in the meridional direction, F3R represents the MTF curve for an arc loss 3.50mm image height; F4T shows the MTF curve for a meridional 5.00mm image height, F4R shows the MTF curve for an arc loss 5.00mm image height; F5T shows the MTF curve for a meridional 6.50mm image height, F5R shows the MTF curve for an arc loss 6.50mm image height; F6T represents the MTF curve for a meridional 8.00mm image height, F6R represents the MTF curve for an arc loss 8.00mm image height; F7T shows the MTF curve for a meridional 9.50mm image height, F7R shows the MTF curve for an arc loss 9.50mm image height; F8T shows the MTF curve for a meridional 10.80mm image height, and F8R shows the MTF curve for an arc-loss 10.80mm image height.

The digital camera M4/3 frame lens has the advantages that: the light ring is oversized, the appearance is exquisite, the cost performance is high, compared with the prior art, the lenses are all made of glass materials, the quality of the lenses and the definition of the lens are improved, and the use performance of the lens is improved.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the present invention, and any modifications, equivalents, improvements, etc. made within the technical spirit and principle of the present invention are included in the scope of the present invention.

Claims

1. The utility model provides an effective focal length 17mm, relative aperture F become 0.95 digital little single camera super large diaphragm M4/3 picture camera lens which characterized in that: the lens comprises twelve lenses which are a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, a ninth lens, a tenth lens, an eleventh lens and a twelfth lens in sequence from the object side; the first lens is a convex object-side spherical negative lens; the second lens is a convex object-side spherical positive lens; the third lens is a convex object-side spherical positive lens; the fourth lens is a convex object-side spherical negative lens; the fifth lens is a concave object-side spherical negative lens; the sixth lens is a convex object-side spherical positive lens; the seventh lens is a convex object-side spherical positive lens; the eighth lens is a convex object-side spherical positive lens; the ninth lens is a concave object-side spherical negative lens; the tenth lens is a convex object-side spherical positive lens; the eleventh lens is a convex object-side spherical positive lens; the twelfth lens is a concave object-side spherical negative lens; the first lens consists of a convex first spherical surface and a concave second spherical surface; the second lens consists of a convex third spherical surface and a convex fourth spherical surface; the third lens consists of a convex fifth spherical surface and a concave sixth spherical surface; the fourth lens consists of a convex seventh spherical surface and a concave eighth spherical surface; the fifth lens consists of a ninth concave spherical surface and a tenth concave spherical surface; the sixth lens consists of a convex eleventh spherical surface and a convex twelfth spherical surface; the seventh lens consists of a convex thirteenth spherical surface and a convex fourteenth spherical surface; the eighth lens consists of a convex fifteenth spherical surface and a convex sixteenth spherical surface; the ninth lens consists of a seventeenth spherical surface and an eighteenth spherical surface; the tenth lens consists of a convex nineteenth spherical surface and a convex twenty-fifth spherical surface; the eleventh lens consists of a convex twenty-first spherical surface and a convex twenty-second spherical surface, and the twelfth lens consists of a concave twenty-third spherical surface and a concave twenty-fourth spherical surface; the lens parameters are:

2. the digital micro single camera super large aperture M4/3 frame lens with an effective focal length of 17mm and a relative aperture F of 0.95 as set forth in claim 1, wherein: the tenth spherical surface is connected with the eleventh spherical surface, the sixteenth spherical surface is connected with the seventeenth spherical surface, and the twenty-second spherical surface is connected with the twenty-third spherical surface.

3. The digital micro single camera super large aperture M4/3 frame lens with an effective focal length of 17mm and a relative aperture F of 0.95 as claimed in claim 2, wherein: the tenth spherical surface is glued with the eleventh spherical surface, the sixteenth spherical surface is glued with the seventeenth spherical surface, and the twenty-second spherical surface is glued with the twenty-third spherical surface.