CN119270487B - Large-aperture large-target-surface high-resolution close-up automatic focusing optical lens - Google Patents
Large-aperture large-target-surface high-resolution close-up automatic focusing optical lens Download PDFInfo
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- CN119270487B CN119270487B CN202411807597.0A CN202411807597A CN119270487B CN 119270487 B CN119270487 B CN 119270487B CN 202411807597 A CN202411807597 A CN 202411807597A CN 119270487 B CN119270487 B CN 119270487B
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- 230000003287 optical effect Effects 0.000 title claims abstract description 68
- 230000005540 biological transmission Effects 0.000 claims abstract description 140
- 239000005331 crown glasses (windows) Substances 0.000 claims description 24
- 239000005308 flint glass Substances 0.000 claims description 21
- 230000001681 protective effect Effects 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 3
- 238000003384 imaging method Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 230000006978 adaptation Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000011514 reflex Effects 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B15/00—Optical objectives with means for varying the magnification
- G02B15/14—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective
- G02B15/16—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group
- G02B15/177—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group having a negative front lens or group of lenses
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B15/00—Optical objectives with means for varying the magnification
- G02B15/14—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective
- G02B15/145—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective having five groups only
- G02B15/1455—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective having five groups only the first group being negative
- G02B15/145527—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective having five groups only the first group being negative arranged -+-++
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Nonlinear Science (AREA)
- Lenses (AREA)
Abstract
本发明公开了一种大光圈大靶面高分辨率近摄的自动对焦光学镜头，由从物方到像方依次设置的透射组G1、透射组G2、透射组G3、透射组G4、透射组G5和探测器组件模块组成，所述透射组G1具有负光焦度，透射组G2具有正光焦度，透射组G3具有负光焦度，透射组G4具有正光焦度，透射组G5具有正光焦度，探测器组件模块由从物方到像方设置的保护窗口、滤光片和像面组成；孔径光阑位于透射组G3和透射组G4之间，本镜头具有大光圈大靶面高分辨率的特点，近摄距可达0.1m，工作波长为435nm‑635nm，远摄距为无穷远，物距离从无穷远变化到近摄距时，对焦行程短，仅需1.9mm，变焦迅速，镜头短，适用范围广，拍摄效果佳。
The invention discloses an autofocus optical lens with large aperture, large target surface, high resolution and close-up photography. The lens comprises a transmission group G1, a transmission group G2, a transmission group G3, a transmission group G4, a transmission group G5 and a detector component module which are arranged in sequence from an object side to an image side. The transmission group G1 has a negative optical focal length, the transmission group G2 has a positive optical focal length, the transmission group G3 has a negative optical focal length, the transmission group G4 has a positive optical focal length, and the transmission group G5 has a positive optical focal length. The detector component module comprises a protection window, a filter and an image plane which are arranged from the object side to the image side. An aperture stop is located between the transmission group G3 and the transmission group G4. The lens has the characteristics of large aperture, large target surface and high resolution. The close-up distance can reach 0.1m, the working wavelength is 435nm-635nm, the telephoto distance is infinity, and when the object distance changes from infinity to the close-up distance, the focusing stroke is short, requiring only 1.9mm, the zoom is fast, the lens is short, the application range is wide, and the shooting effect is good.
Description
Technical Field
The invention belongs to the technical field of optical lenses, and particularly relates to an automatic focusing optical lens with a large aperture, a large target surface and high resolution close-up.
Background
In recent years, in the photography market, micro-cameras are rapidly expanding, and due to the high performance and portability of the micro-cameras, the micro-cameras are small in size, light in weight and excellent in portability due to the elimination of the reflector assembly, meanwhile, due to the mature technology of high-precision CMOS, the micro-cameras also have unjust high-quality imaging quality, the use population is continuously increasing, and various requirements are met for various photography scenes. The matched lens focus Duan Fanwei of the original factory still has a gap, in particular to a large aperture large target surface high resolution auto-focusing optical lens, the price of the lens is very expensive, and not all photographic consumers can accept the lens. The micro-single camera lens is the same as the single lens reflex, and consumers want to have high performance and high cost performance. According to the invention, through the matching of the 5 groups of optical lenses and the smart combination of optical materials and the matching of the optical lens intervals, the clear imaging of targets with different sizes under the condition of infinite distance and close-up of an object space can be realized, and meanwhile, in the zooming process, the imaging quality reaches the quality of an imaging lens of the fixed-focus optical lens. It is expected that the large aperture large target surface high resolution close-up distance of the invention can reach 0.1m, and the auto-focusing optical lens has wide application prospect.
Disclosure of Invention
In order to overcome the defects, the automatic focusing optical lens for large aperture, large target surface and high resolution close-up is provided, the automatic focusing optical lens has the characteristics of large aperture, large target surface and high resolution, the close-up distance can reach 0.1m, the working wavelength is 435nm-635nm, the far-up distance is infinity, and when the object distance is changed from infinity to close-up distance, the focusing stroke is short and only needs 1.9mm, the zooming is rapid, the lens is short, the application range is wide, and the shooting effect is good.
The technical scheme adopted by the invention for achieving the purpose is to provide the auto-focusing optical lens with large aperture, large target surface and high resolution close-up. Consists of a transmission group G1, a transmission group G2, a transmission group G3, a transmission group G4, a transmission group G5 and a detector assembly module which are sequentially arranged from an object side to an image side,
The transmission group G1 has negative focal power, the transmission group G2 has positive focal power, the transmission group G3 has negative focal power, the transmission group G4 has positive focal power, and the transmission group G5 has positive focal power;
The transmission group G1 consists of 4 pieces of transmission, and the transmission group G1 sequentially comprises a first negative lens made of crown glass, a second negative lens made of crown glass, a third negative lens made of crown glass and a fourth negative lens made of crown glass from the object side to the image side;
The transmission group G2 is formed by a group of double-cemented lenses and a group of single lenses for total transmission of 3 pieces, and the transmission group G2 sequentially comprises a first positive lens made of flint glass, a second positive lens made of crown glass and a third positive lens made of flint glass from the object side to the image side;
The transmission group G3 consists of 3 pieces of transmission, and the transmission group G3 sequentially comprises a fifth negative lens made of flint glass, a fourth positive lens made of crown glass and a sixth negative lens made of flint glass from the object side to the image side;
The transmission group G4 consists of 4 pieces of transmission, and the transmission group G4 sequentially comprises a fifth positive lens made of plastic, a sixth positive lens made of crown glass, a seventh negative lens made of flint glass and a seventh positive lens made of crown glass from the object side to the image side;
The transmission group G5 consists of 2 pieces of transmission, and the transmission group G5 sequentially comprises an eighth positive lens made of flint glass and a ninth positive lens made of flint glass from the object side to the image side;
the detector assembly module consists of a protection window, an optical filter and an image plane which are arranged from an object space to an image space;
The aperture stop is located between the transmission group G3 and the transmission group G4.
The invention relates to an auto-focusing optical lens with large aperture and large target surface and high resolution close-up, which has the further preferable technical scheme that the range of the ratio of the focal length of a transmission group G1 to the focal length of an optical system when the object is at infinity is (-2.62, -1.16);
The range of focal length ratio of the transmission group G2 and the optical system at the infinite object distance is (2.11,2.53);
The focal length of the transmission group G3 and the focal length ratio of the optical system at an infinite object distance range (-3.05, -2.66);
The range of focal length ratio of the transmission group G4 and the optical system at the infinite object distance is (2.22,3.19);
the focal length of the transmissive group G5 and the focal length ratio of the optical system at infinity range (3.18,3.56).
According to the large-aperture large-target-surface high-resolution close-up automatic focusing optical lens, the further preferable technical scheme is that the first to fourth positive lenses, the sixth to ninth positive lenses and the first to seventh negative lenses all adopt spherical lenses, and the fifth positive lens adopts a double-sided aspheric lens.
According to the large-aperture large-target-surface high-resolution close-up automatic focusing optical lens, a further preferable technical scheme is that a sixth positive lens in the transmission group G4 is a motion component.
According to the large-aperture large-target-surface high-resolution close-up automatic focusing optical lens, a further preferable technical scheme is that in a transmission group G2, a first positive lens and a second positive lens form a double-cemented lens, in a transmission group G3, a fourth positive lens and a sixth negative lens form the double-cemented lens, and in a transmission group G4, a seventh negative lens and a seventh positive lens form the double-cemented lens.
Compared with the prior art, the technical scheme of the invention has the following advantages/beneficial effects:
1. The lens has the characteristics of large aperture, large target surface and high resolution, the near-distance can reach 0.1m, the working wavelength is 435nm-635nm, the far-distance is infinity, and when the object distance is changed from infinity to near-distance, the focusing stroke is short, only 1.9mm is needed, the zooming is rapid, the lens is short, the application range is wide, and the shooting effect is good.
2. The lens consists of a transmission group G1, a transmission group G2, a transmission group G3, a transmission group G4 and a transmission group G5, all 16 lenses made of glass lenses are used, higher quality is obtained under the condition of a small number, the transmittance of an optical system is also higher, all lenses except for a fifth positive lens are spherical, good imaging characteristics are achieved, and the whole system has good transfer functions and image points.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some examples of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a large aperture large target surface high resolution close-up auto-focusing optical lens according to the present invention.
FIG. 2 is a graph of modulation transfer function at infinity for a large aperture, large target surface, high resolution close-up auto-focus optical lens in accordance with the present invention.
FIG. 3 is a graph of the modulation transfer function at close-up of a large aperture large target surface high resolution close-up auto-focus optical lens of the present invention.
Fig. 4 is a view of a transverse fan at infinity for a large aperture, large target surface, high resolution close-up autofocus optical lens in accordance with the present invention.
Fig. 5 is a view of a lateral fan of an auto-focus optical lens for high-resolution close-up with a large aperture and a large target surface according to the present invention.
Fig. 6 is a point column diagram at infinity of a large aperture large target surface high resolution close-up autofocus optical lens of the present invention.
Fig. 7 is a point chart at the time of close-up of an auto-focus optical lens for high-resolution close-up with a large aperture and a large target surface according to the present invention.
The marks in the figure are respectively: 1,2, 3, 4, 5, a first positive lens a second positive lens, a third positive lens, a fifth negative lens, a fourth positive lens, a third negative lens, a fourth positive lens sixth negative lens, 11, fifth positive lens, 12, sixth positive lens, 13, seventh negative lens, 14, seventh positive lens, 15, eighth positive lens, 16, ninth positive lens, 17, protection window, 18, optical filter, 19, image plane.
Detailed Description
To make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, based on the embodiments of the invention, which are apparent to those of ordinary skill in the art without inventive faculty, are intended to be within the scope of the invention. Accordingly, the detailed description of the embodiments of the invention provided below is not intended to limit the scope of the invention as claimed, but is merely representative of selected embodiments of the invention.
It should be noted that like reference numerals and letters refer to like items in the following figures, and thus once an item is defined in one figure, it may not be further defined and explained in subsequent figures.
Examples:
Fig. 1 is a schematic layout diagram of an auto-focusing optical lens with large aperture and large target surface and high resolution close-up in the invention, which is composed of a transmission group G1, a transmission group G2, a transmission group G3, a transmission group G4, a transmission group G5 and a detector assembly module sequentially arranged from an object side to an image side.
The range of focal length ratio of the transmission group G1 to the focal length ratio of the optical system at infinity (-2.62, -1.16), the range of focal length ratio of the transmission group G2 to the focal length ratio of the optical system at infinity (2.11,2.53), the range of focal length ratio of the transmission group G3 to the focal length ratio of the optical system at infinity (-3.05, -2.66), the range of focal length ratio of the transmission group G4 to the focal length ratio of the optical system at infinity (2.22,3.19), and the range of focal length ratio of the transmission group G5 to the focal length ratio of the optical system at infinity (3.18,3.56).
The transmission group G1 is a transmission group having negative optical power, and the transmission group G1 sequentially includes, from the object side to the image side, a first negative lens 1 made of crown glass, a second negative lens 2 made of crown glass, a third negative lens 3 made of crown glass, and a fourth negative lens 4 made of crown glass. The light entering the transmission group G1 diverges from the transmission group G1 and enters the transmission group G2.
The transmission group G2 is a transmission group with positive focal power, the transmission group G2 is composed of a group of double cemented lenses and a group of single lenses, which total 3 pieces of transmission, the transmission group G2 sequentially comprises a first positive lens 5 made of flint glass, a second positive lens 6 made of crown glass and a third positive lens 7 made of flint glass from the object side to the image side, and in the transmission group G2, the first positive lens 5 and the second positive lens 6 form the double cemented lenses. The light rays coming out of the transmission group G1 are converged by the transmission group G2 and then enter the transmission group G3.
The transmission group G3 is a transmission group having negative optical power, the transmission group G3 is composed of a group of single lenses and a group of double cemented lenses, and total 3 pieces of transmission are sequentially composed of a fifth negative lens 8 made of flint glass, a fourth positive lens 9 made of crown glass and a sixth negative lens 10 made of flint glass from the object side to the image side, and in the transmission group G3, the fourth positive lens 9 and the sixth negative lens 10 form the double cemented lenses. Light rays exiting the transmission group G2 diverge from the transmission group G3 and enter the transmission group G4.
The transmission group G4 is a transmission group having positive optical power, the transmission group G4 is composed of a total of 4 pieces of transmission of a group of double cemented lenses and two groups of single lenses, the transmission group G4 is sequentially composed of a fifth positive lens 11 made of plastic, a sixth positive lens 12 made of crown glass, a seventh negative lens 13 made of flint glass and a seventh positive lens 14 made of crown glass from the object side to the image side, and the seventh negative lens 13 and the seventh positive lens 14 constitute the double cemented lenses in the transmission group G4. The light rays coming out of the transmission group G3 are converged by the transmission group G4 and then enter the transmission group G5.
The transmission group G5 is a transmission group having positive optical power, the transmission group G5 is composed of 2 total transmissions of two single lenses, and the transmission group G5 is composed of an eighth positive lens 15 made of flint glass and a ninth positive lens 16 made of flint glass in order from the object side to the image side. The light rays coming out of the transmission group G4 are converged by the transmission group G5 and then enter the image plane.
The detector assembly module consists of a protection window 17, an optical filter 18 and an image surface 19 which are arranged from the object side to the image side, and the aperture diaphragm is positioned between the transmission group G3 and the transmission group G4.
The physical parameters of each lens of this example meet the data requirements shown in table 1:
table 1 physical parameters of each lens of this example
The equation for the aspherical surface is as follows:
the aspherical shape definition is described as follows:
and y, starting from the optical axis, radial coordinates.
And z, the offset of the direction of the optical axis from the intersection point of the aspheric surface and the optical axis.
And r is the curvature radius of the reference sphere of the aspheric surface.
K is a conic constant, and A4, A6, A8, a10, a12 are aspherical coefficients of 4 times, 6 times, 8 times, 10 times, 12 times.
The surface 21 and the surface 22 of the fifth positive lens 11 are aspherical surfaces. In the table below, the aspherical coefficients A4, A6, A8, a10, a12 of the order 12 of aspherical surfaces A4, A6, A8, a10, a12 and the conic constant k are collectively shown, and E is a scientific count symbol in the table.
Table 2 aspherical parameters of the present example
The embodiment is realized by the following technical measures that the working wavelength of an optical lens is 435nm-635nm, the telephoto distance is infinity, the close-up distance is 0.1m, the aperture is 1.4, and the target surface is 10.8mm. The light rays are emitted from the object plane and then imaged to the image plane through the transmission group G1, the transmission group G2, the transmission group G3, the transmission group G4 and the transmission group G5. The invention has the advantages of strong aperture blurring capacity, large target surface, high resolution, short near-distance, quick focusing, good imaging quality and the like.
Fig. 2 and 3 show the modulation transfer function curves of the lens designed in the present embodiment at infinity and close-up. The contrast ratio of the lens is higher at infinity and close-up, and the resolution ratio is high and reaches 210lp/mm.
Fig. 4 and 5 show the transverse fan diagrams of the lens designed in the present embodiment at infinity and close-up. It is known that the aberration of the lens is small at infinity and close-up.
Fig. 6 and 7 show dot patterns of the lens designed in the present embodiment at infinity and close-up. The lens has small image point spots and good consistency in infinity and close-up.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed, mechanically connected, electrically connected, directly connected, indirectly connected via an intervening medium, or in communication between two elements or in an interaction relationship between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that the above-mentioned preferred embodiment should not be construed as limiting the invention, and the scope of the invention should be defined by the appended claims. It will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the spirit and scope of the invention, and such modifications and adaptations are intended to be comprehended within the scope of the invention.
Claims (5)
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016045224A (en) * | 2014-08-19 | 2016-04-04 | リコー光学株式会社 | Projection zoom lens and projection-type image display device |
| CN116643374A (en) * | 2022-02-24 | 2023-08-25 | 富士胶片株式会社 | Imaging lens and imaging device |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI322278B (en) * | 2007-02-14 | 2010-03-21 | Asia Optical Co Inc | Zoom lens |
| EP2249193B1 (en) * | 2008-02-29 | 2022-12-28 | Konica Minolta Opto, Inc. | Magnified-projection optical system, and digital type planetarium device |
| US20190369371A1 (en) * | 2017-01-25 | 2019-12-05 | Sony Corporation | Zoom lens and imaging apparatus |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016045224A (en) * | 2014-08-19 | 2016-04-04 | リコー光学株式会社 | Projection zoom lens and projection-type image display device |
| CN116643374A (en) * | 2022-02-24 | 2023-08-25 | 富士胶片株式会社 | Imaging lens and imaging device |
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