CN103064169A - Image shooting lens - Google Patents
Image shooting lens Download PDFInfo
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- CN103064169A CN103064169A CN2011103208686A CN201110320868A CN103064169A CN 103064169 A CN103064169 A CN 103064169A CN 2011103208686 A CN2011103208686 A CN 2011103208686A CN 201110320868 A CN201110320868 A CN 201110320868A CN 103064169 A CN103064169 A CN 103064169A
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Abstract
The invention relates to an image shooting lens which comprises a first lens, a second lens, a third lens, a fourth lens and a fifth lens, and the first lens, the second lens, the third lens, the fourth lens and the fifth lens are sequentially arrayed along an optical axis from an object side to an image side. The first lens is a biconcave lens which has negative refractive power and made of plastics, and at least one face of the first lens is an aspheric surface. The second lens is a biconvex lens which has positive refractive power, and the second lens is made of glass. The third lens is a biconcave lens which has negative refractive power and made of glass. The fourth lens is a biconvex lens which has positive refractive power and made of plastics, and at least one face of the fourth lens is an aspheric surface. The fifth lens is a meniscus lens which has negative refractive power, and the convex face of the fifth lens faces toward the image side. The fifth lens is made of glass.
Description
Technical field
The present invention is relevant with camera lens, in more detail refers to a kind of sampling image lens.
Background technology
In recent years, along with the progress of science and technology, such as image capture units such as microscope or scanners, tend to gradually miniaturization and lightweight development for being convenient for people to use, this will so that the volume of the used sampling image lens of above-mentioned image capture unit also therefore significantly dwindled.In addition, except miniaturization and lightweight, also want to have higher optical performance, just can make and reach representing of high resolving power and high contrast.Therefore, miniaturization and high optical performance are indispensable two important documents of sampling image lens.
Yet the sampling image lens that present image capture unit adopts for reaching the purpose of high optical performance, nothing more than having used the multi-disc eyeglass, reaches what is more ten multi-discs, and can't effectively reach the purpose of miniaturization.In addition, the also promising purpose that makes sampling image lens reach miniaturization, and only use five following eyeglasses, but so that its optical performance can't effectively promote.Comprehensively the above can be learnt, known sampling image lens is not discriminated perfect yet, and the part that still haves much room for improvement.
Summary of the invention
The technical problem to be solved in the present invention is, can't take into account the defective of miniaturization and high optical performance for sampling image lens of the prior art, and a kind of sampling image lens is provided, and not only can reach the purpose of miniaturization, has simultaneously the usefulness of high optics.
The technical solution adopted for the present invention to solve the technical problems is, a kind of sampling image lens is provided, include along optical axis and by the thing side to the first eyeglass, the second eyeglass, prismatic glasses, the 4th eyeglass and the 5th eyeglass sequentially arranged as side.Wherein, this first eyeglass is the biconcave lens with negative refractive power, and one side is non-spherical surface at least; This second eyeglass is the biconvex lens with positive refractive power; This prismatic glasses is the biconcave lens with negative refractive power; The 4th eyeglass is the biconvex lens with positive refractive power, and one side is non-spherical surface at least; The 5th eyeglass is to have negative refractive power and convex surface towards these meniscus lens as side.
By this, utilize above-mentioned optical design to reach the purpose of miniaturization and high optical performance.
Description of drawings
Fig. 1 is the eyeglass arrangement plan of the present invention's the first preferred embodiment;
Fig. 2 is the index path of the present invention's the first preferred embodiment;
Fig. 3 A is the curvature of field figure of the present invention's the first preferred embodiment;
Fig. 3 B is the distortion figure of the present invention's the first preferred embodiment;
Fig. 3 C is the light fan figure of the present invention's the first preferred embodiment;
Fig. 3 D is the out of focus modulation transfer function figure of the present invention's the first preferred embodiment;
Fig. 3 E is the Space Frequency Modulation transport function figure of the present invention's the first preferred embodiment;
Fig. 4 is the eyeglass arrangement plan of the present invention's the second preferred embodiment;
Fig. 5 is the index path of the present invention's the second preferred embodiment;
Fig. 6 A is the curvature of field figure of the present invention's the second preferred embodiment;
Fig. 6 B is the distortion figure of the present invention's the second preferred embodiment;
Fig. 6 C is the light fan figure of the present invention's the second preferred embodiment;
Fig. 6 D is the out of focus modulation transfer function figure of the present invention's the second preferred embodiment;
Fig. 6 E is the Space Frequency Modulation transport function figure of the present invention's the second preferred embodiment.
Embodiment
For being illustrated more clearly in the present invention, hereby lifting preferred embodiment and cooperate accompanying drawing to be described in detail as follows.
See also Fig. 1, be the eyeglass arrangement plan of the sampling image lens 1 of the present invention's the first preferred embodiment.Fig. 2 is index path embodiment illustrated in fig. 1.Cooperate Fig. 1 and Fig. 2, below will describe the sampling image lens 1 of the present embodiment in detail.
This sampling image lens 1 include along optical axis Z and by the thing side to the first eyeglass L1, the second eyeglass L2, prismatic glasses L3, aperture ST, the 4th eyeglass L4 and the 5th eyeglass L5 that sequentially arrange as side.In addition, more being provided with optical filter CF (Color Filter) at the 5th eyeglass L5 and between as side, is sheet glass, and its effect belongs to prior art, repeats no more in this appearance.Wherein:
This first eyeglass L1 is made by plastic material.This first eyeglass L1 is the biconcave lens with negative refractive power, and two concave surface R1, R2 are all non-spherical surface.
This second eyeglass L2 is made by glass material.This second eyeglass L2 is the biconvex lens with positive refractive power.
This prismatic glasses L3 is made by glass material.This prismatic glasses L3 is the biconcave lens with negative refractive power, and this prismatic glasses L3 and this second eyeglass L2 gummed formation compound lens L2-3.
The 4th eyeglass L4 is made by plastic material.The 4th eyeglass L4 is the biconvex lens with positive refractive power, and two convex surface R8, R9 are non-spherical surface.
The 5th eyeglass L5 is made by glass material.The 5th eyeglass L5 has negative refractive power and convex surface R11 towards the meniscus lens of picture side.
By this, utilize negative refractive power and the non-spherical surface design of this first eyeglass L1, and the positive refractive power of the 4th eyeglass L4 and the non-spherical surface design purpose that reaches this sampling image lens 1 overall length of effective shortening and increase its angle of visibility (Field ofView angle, FOV).
For reaching above-mentioned purpose and effective optical performance that promotes this sampling image lens 1, the optical axis Z of the focal length F of the sampling image lens 1 of preferred embodiment of the present invention (Focus Length), numerical aperture FNO (F-number), each lens surface is by radius of curvature R (radius of curvature), thickness T (thickness), the refractive index Nd (refractive index) of each eyeglass and the Abbe coefficient Vd (Abbe number) of each eyeglass of each eyeglass on optical axis Z at place, as shown in Table 1:
Table one
In each eyeglass of the present embodiment, the surface depression degree z of these non-spherical surfaces R1, R2, R8 and R9 is resulting by following formula:
Wherein:
Z: the depression degree of non-spherical surface;
C: the inverse of radius-of-curvature;
H: the aperture radius on surface;
K: circular cone coefficient;
A～G: each rank coefficient of the aperture radius h on surface.
In the present embodiment, each rank coefficient A～G of the circular cone coefficient k of each non-spherical surface (conic constant) and surface apertures radius h is as shown in Table 2:
Table two
By above-mentioned eyeglass and aperture ST configuration, so that the sampling image lens 1 of the present embodiment also can reach requirement on image quality, this can find out from Fig. 3 A to Fig. 3 E.Shown in Fig. 3 A, be the curvature of field figure of the sampling image lens 1 of the present embodiment; Shown in Fig. 3 B, be the distortion figure of the sampling image lens 1 of the present embodiment; Shown in Fig. 3 C, be the light fan figure of the sampling image lens 1 of the present embodiment; Shown in Fig. 3 D, be the out of focus modulation transfer function figure (Through Focus MTF) of the sampling image lens 1 of the present embodiment; Shown in Fig. 3 E, be the Space Frequency Modulation transport function figure (Spatial Frequency MTF) of the sampling image lens 1 of the present embodiment.
Can be found out by Fig. 3 A, the maximum curvature of field of the present embodiment be no more than 0.08mm and-0.12mm; Can be found out by Fig. 3 B, the amount of distortion of the present embodiment is no more than 0.6%; Can be found out by Fig. 3 C and Fig. 3 D, the present embodiment all has good resolution in which field positions; Can be found out by Fig. 3 E, the present embodiment is in 48lp/mm, and its modulated optical transfer function values still maintains more than 60%, and resolution and the optical performance thereof of the sampling image lens 1 of obvious the present embodiment are standard compliant.
Above-described, be the sampling image lens 1 of first embodiment of the invention; According to technology of the present invention, below cooperate Fig. 4 and Fig. 5 that the sampling image lens 2 of second embodiment of the invention is described.
This sampling image lens 2 include along optical axis Z and by the thing side to the first eyeglass L1, the second eyeglass L2, prismatic glasses L3, aperture ST, the 4th eyeglass L4 and the 5th eyeglass L5 that sequentially arrange as side.In addition, be provided with equally optical filter CF (Color Filter) at the 5th eyeglass L5 and between as side.Wherein:
This first eyeglass L1 is made by plastic material.This first eyeglass L1 is the biconcave lens with negative refractive power, and two concave surface R1, R2 are all non-spherical surface.
This second eyeglass L2 is made by glass material.This second eyeglass L2 is the biconvex lens with positive refractive power.
This prismatic glasses L3 is made by glass material.This prismatic glasses L3 is the biconcave lens with negative refractive power, and this prismatic glasses L3 and this second eyeglass L2 gummed formation compound lens L2-3.
The 4th eyeglass L4 is made by plastic material.The 4th eyeglass L4 is the biconvex lens with positive refractive power, and two convex surface R8, R9 are non-spherical surface.
The 5th eyeglass L5 is made by glass material.The 5th eyeglass L5 has negative refractive power and convex surface R11 towards the meniscus lens of picture side.
By this, the present embodiment utilizes this first eyeglass L1 negative refractive power and non-spherical surface design equally, and the 4th eyeglass L4 positive refractive power and non-spherical surface design purpose of reaching these sampling image lens 2 overall lengths of effective shortening and increasing its angle of visibility (Field ofView angle, FOV).
For reaching above-mentioned purpose and effective optical performance that promotes this sampling image lens 2, the optical axis Z of the focal length F of the sampling image lens 2 of preferred embodiment of the present invention (Focus Length), numerical aperture FNO (F-number), each lens surface is by radius of curvature R (radius of curvature), thickness T (thickness), the refractive index Nd (refractive index) of each eyeglass and the Abbe coefficient Vd (Abbe number) of each eyeglass of each eyeglass on optical axis Z at place, as shown in Table 3:
Table three
In each eyeglass of the present embodiment, the surface depression degree z of these non-spherical surfaces R1, R2, R8 and R9 is resulting by following formula:
Wherein:
Z: the depression degree of non-spherical surface;
C: the inverse of radius-of-curvature;
H: the aperture radius on surface;
K: circular cone coefficient;
A～G: each rank coefficient of the aperture radius h on surface.
In the present embodiment, each rank coefficient A～G of the circular cone coefficient k of each non-spherical surface (conic constant) and surface apertures radius h is as shown in Table 4:
Table four
By above-mentioned eyeglass and aperture ST configuration, so that the sampling image lens 2 of the present embodiment also can reach requirement on image quality, this can find out from Fig. 6 A to Fig. 6 E.Shown in Fig. 6 A, be the curvature of field figure of the sampling image lens 2 of the present embodiment; Shown in Fig. 6 B, be the distortion figure of the sampling image lens 2 of the present embodiment; Shown in Fig. 6 C, be the light fan figure of the sampling image lens 2 of the present embodiment; Shown in Fig. 6 D, be the out of focus modulation transfer function figure (Through Focus MTF) of the sampling image lens 2 of the present embodiment; Shown in Fig. 6 E, be the Space Frequency Modulation transport function figure (Spatial Frequency MTF) of the sampling image lens 2 of the present embodiment.
Can be found out by Fig. 6 A, the maximum curvature of field of the present embodiment be no more than 0.08mm and-0.12mm; Can be found out by Fig. 6 B, the amount of distortion of the present embodiment is no more than 0.2%; Can be found out by Fig. 6 C and Fig. 6 D, the present embodiment all has good resolution in which field positions; Can be found out by Fig. 6 E, the present embodiment is in 48lp/mm, and its modulated optical transfer function values still maintains more than 60%, and resolution and the optical performance thereof of the sampling image lens 2 of obvious the present embodiment are standard compliant.
Comprehensive the above can learn, sampling image lens of the present invention not only can utilize optical design to shorten overall length and reach the purpose of miniaturization, more only utilizes a small amount of eyeglass namely to reach the effect of lightweight and high optical performance simultaneously.
The above only is the better possible embodiments of the present invention, such as uses equivalent structure and method for making variation that instructions of the present invention and claim are done, ought to be included in the claim of the present invention.
Claims (7)
1. a sampling image lens is characterized in that, include along optical axis and by the thing side to sequentially arranging as side:
The first eyeglass, for having the biconcave lens of negative refractive power, and one side is non-spherical surface at least;
The second eyeglass is for having the biconvex lens of positive refractive power;
Prismatic glasses is for having the biconcave lens of negative refractive power;
The 4th eyeglass, for having the biconvex lens of positive refractive power, and one side is non-spherical surface at least; And
The 5th eyeglass is for having negative refractive power and convex surface towards these meniscus lens as side.
2. sampling image lens as claimed in claim 1 is characterized in that, more includes aperture, between this prismatic glasses and the 4th eyeglass.
3. sampling image lens as claimed in claim 1 is characterized in that, the two sides of this first eyeglass is all non-spherical surface.
4. sampling image lens as claimed in claim 1 is characterized in that, this second eyeglass and this prismatic glasses gummed consist of complex optics.
5. sampling image lens as claimed in claim 1 is characterized in that, the two sides of the 4th eyeglass is all non-spherical surface.
6. sampling image lens as claimed in claim 1 is characterized in that, more includes optical filter, between the 5th eyeglass and this are as side.
7. sampling image lens as claimed in claim 1 is characterized in that, this first eyeglass is made by plastic material, this second eyeglass is made by glass material, this prismatic glasses is made by glass material, and the 4th eyeglass is made by plastic material, and the 5th eyeglass is made by glass material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110320868.6A CN103064169B (en) | 2011-10-20 | 2011-10-20 | Image shooting lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110320868.6A CN103064169B (en) | 2011-10-20 | 2011-10-20 | Image shooting lens |
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|---|---|
| CN103064169A true CN103064169A (en) | 2013-04-24 |
| CN103064169B CN103064169B (en) | 2015-04-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201110320868.6A Expired - Fee Related CN103064169B (en) | 2011-10-20 | 2011-10-20 | Image shooting lens |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104181676A (en) * | 2013-05-23 | 2014-12-03 | 信泰光学(深圳)有限公司 | Micro lens |
| CN105068215A (en) * | 2015-08-14 | 2015-11-18 | 福建福光股份有限公司 | Low-distortion high-resolution day and night lens |
| CN105676415A (en) * | 2014-12-08 | 2016-06-15 | Kolen株式会社 | Photographic lens optical system |
| CN111158115A (en) * | 2020-02-24 | 2020-05-15 | 瑞声通讯科技(常州)有限公司 | Image pickup optical lens |
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| US5528428A (en) * | 1991-11-13 | 1996-06-18 | Nikon Corporation | Compact wide-angle objective lens |
| JP2001356267A (en) * | 2001-04-27 | 2001-12-26 | Asahi Optical Co Ltd | Zoom lens |
| CN1673796A (en) * | 2004-03-23 | 2005-09-28 | 富士能株式会社 | A zoom lens including adjoining lens |
| CN2763825Y (en) * | 2004-12-28 | 2006-03-08 | 矽峰光电科技股份有限公司 | Sectional zoom lens |
| JP2010008562A (en) * | 2008-06-25 | 2010-01-14 | Konica Minolta Opto Inc | Imaging lens |
| CN102854611A (en) * | 2011-06-29 | 2013-01-02 | 亚洲光学股份有限公司 | Microminiature imaging lens |
-
2011
- 2011-10-20 CN CN201110320868.6A patent/CN103064169B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5528428A (en) * | 1991-11-13 | 1996-06-18 | Nikon Corporation | Compact wide-angle objective lens |
| JP2001356267A (en) * | 2001-04-27 | 2001-12-26 | Asahi Optical Co Ltd | Zoom lens |
| CN1673796A (en) * | 2004-03-23 | 2005-09-28 | 富士能株式会社 | A zoom lens including adjoining lens |
| CN2763825Y (en) * | 2004-12-28 | 2006-03-08 | 矽峰光电科技股份有限公司 | Sectional zoom lens |
| JP2010008562A (en) * | 2008-06-25 | 2010-01-14 | Konica Minolta Opto Inc | Imaging lens |
| CN102854611A (en) * | 2011-06-29 | 2013-01-02 | 亚洲光学股份有限公司 | Microminiature imaging lens |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104181676A (en) * | 2013-05-23 | 2014-12-03 | 信泰光学(深圳)有限公司 | Micro lens |
| CN105676415A (en) * | 2014-12-08 | 2016-06-15 | Kolen株式会社 | Photographic lens optical system |
| CN105068215A (en) * | 2015-08-14 | 2015-11-18 | 福建福光股份有限公司 | Low-distortion high-resolution day and night lens |
| CN105068215B (en) * | 2015-08-14 | 2018-07-27 | 福建福光股份有限公司 | Low distortion high resolution day and night camera lens |
| CN111158115A (en) * | 2020-02-24 | 2020-05-15 | 瑞声通讯科技(常州)有限公司 | Image pickup optical lens |
| CN111158115B (en) * | 2020-02-24 | 2021-11-02 | 诚瑞光学(常州)股份有限公司 | Image pickup optical lens |
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| CN103064169B (en) | 2015-04-01 |
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