CN101813819B - Thin photographic optical lens group - Google Patents
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- CN101813819B CN101813819B CN2009101179056A CN200910117905A CN101813819B CN 101813819 B CN101813819 B CN 101813819B CN 2009101179056 A CN2009101179056 A CN 2009101179056A CN 200910117905 A CN200910117905 A CN 200910117905A CN 101813819 B CN101813819 B CN 101813819B
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Abstract
The invention provides a thin photographic optical lens groups which sequentially comprises a first lens with positive flexion force, a second lens with negative flexion force and an aperture from the object side to the image side, wherein the front surface of the first lens is a convex surface, the rear surface is a concave surface, and the front surface and the rear surface of the first lens are both aspheric surfaces; the front surface of the second lens is a concave surface, the rear surface is a convex surface, and the front surface and the rear surface of the second lens are both aspheric surfaces; the aperture is positioned in the front of the first lens; in the thin photographic optical lens group, the Abbe number of the first lends is V1, the Abbe number of the second lens is V2,and the relation satisfies: absolute (V1-V2) is less than 15; in the thin photographic optical lens group, the number of lenses with the flexion force is limited to be two; and by adopting the lens structure and the arrangement mode, the size of the lens group is effectively shortened, the sensitivity of an optical system is reduced, and the higher resolving power can be obtained.
Description
Technical field
The invention relates to a kind of photographic optical lens group; Be meant a kind of thin photographic optical lens group of the mobile phone that is applied to take pictures especially.
Background technology
Recent years, rise along with mobile phone camera, the demand of miniaturization phtographic lens day by day improves, and the photo-sensitive cell of general phtographic lens is nothing more than being sensitization coupling element (Charge Coupled Device, CCD) or complementary metal oxide semiconductor (CMOS) (Complementary Metal-Oxide Semiconductor, CMOS) two kinds, and because the progress of semiconductor process techniques, make the elemental area of photo-sensitive cell dwindle, add that electronic product constantly develops toward the good and compact direction of function, therefore, grow with each passing day for the slim phtographic lens demand that possesses good image quality on the market.
Common mobile lens, for considering the revisal of aberration, adopt based on the three-chip type lens arrangement more, wherein the most general is positive and negative positive Triplet pattern, but when Lens during constantly toward lightening dwindling, the system imaging space is also and then tightened, therefore make inserting of three lens become difficult, and in limited space, the thickness of eyeglass also need and then dwindle, and its material uniformity coefficient of eyeglass that makes plastic cement injection moulding make is bad.
United States Patent (USP) the 7th, 463, a kind of slimming phtographic lens that is made of two lens is provided for No. 433, it is first lens of the positive refracting power of a tool and second lens of the negative refracting power of a tool as side extremely by the thing side in regular turn, structure even so can provide good resolving power and keep lightening characteristic, but because its first lens are adopted with two sides biconvex form, makes the refracting power of each lens of system strengthen relatively, easily cause the susceptibility of optical system to increase, comparatively difficult to the control of making yield.
Summary of the invention
For obtaining good image quality, and effectively shorten the optics total length of camera lens, keep the characteristic of camera lens slimming, and lower the susceptibility of optical system, the invention provides and a kind ofly cooperate the thin photographic optical lens groups that aperture constituted by two lens, its main idea is as follows:
A kind of thin photographic optical lens group, extremely comprised in regular turn as side by the thing side: first lens of the positive refracting power of a tool, its front surface are that convex surface, rear surface are concave surface, and the forward and backward surface of first lens is all aspheric surface; Second lens of the negative refracting power of one tool, its front surface is that concave surface, rear surface are convex surface, and the forward and backward surface of second lens is all aspheric surface; One aperture, it places before first lens; The number of lenses of tool refracting power is restricted to two in the thin photographic optical lens group of the present invention, and by above-mentioned configuration, effectively the image quality of elevator system lowers the optical system susceptibility, and can have the characteristic of slimming simultaneously concurrently.
In thin photographic optical lens group of the present invention, first lens are that front surface is that convex surface, rear surface are the meniscus lens of concave surface, the astigmatism (Astigmatism) that can help update the system, and dispose comparatively balance for the refracting power of each eyeglass of system, can make the susceptibility of system less; And the negative refracting power of the second lens tool, the principal point (Principal Point) that can make imaging optical system helps shortening the optics total length of system away from imaging surface, to keep the characteristic of camera lens slimming.
In thin photographic optical lens group of the present invention, the refracting power of system is mainly provided by first lens of the positive refracting power of tool, and second lensing of the negative refracting power of tool is as the revisal lens, and its function is balance and every aberration that update the system produced.Moreover, the present invention provides powerful positive refracting power by first lens, and aperture placed object side near the thin photographic optical lens group, can effectively shorten the optics total length of thin photographic optical lens group, in addition, above-mentioned configuration can make the outgoing pupil (ExitPupil) of thin photographic optical lens group away from imaging surface, therefore, light will be incident in the mode near vertical incidence on the photo-sensitive cell, this is the heart far away (Telecentric) characteristic of imaging side, heart characteristic far away is very important for the photoperceptivity of solid-state electronic photo-sensitive cell at present, will make the sensitization susceptibility of sense electronics optical element improve, and the minimizing system produces the possibility at dark angle.
In thin photographic optical lens group of the present invention, the first lens Abbe number (Abbe Number) is V1, and the second lens Abbe number is V2, and it satisfies routine relational expression down:
|V1-V2|＜15；
When V1 and V2 satisfied the above-mentioned relation formula, the effective astigmatism (Astigmatism) and coma (Coma) that are produced of update the system promoted the resolving power of thin photographic optical lens group.
Be accompanied by the trend of lens of photographic mobile phone slimming, and system need contain visual angle widely, make the focal length of optical system become very short, in this case, it is very little that the radius-of-curvature of eyeglass and lens dimension all become, and will be difficult to produce above-mentioned eyeglass with the traditional glass abrasive method, therefore, if eyeglass adopts plastic cement material, can make eyeglass by injection molding mode, with the eyeglass of cheaper cost production high precision; If eyeglass adopts glass material, glass mirror that then can moulded glass mode production high precision; And aspheric surface is set on minute surface, aspheric surface can be made into the shape beyond the sphere easily, obtains more controlled variable, in order to subduing aberration, and then the number of reduction eyeglass use, can effectively shorten the optics total length of thin photographic optical lens group by this.
In sum,, can effectively promote the image quality of thin photographic optical lens group, lower the optical system susceptibility, and can have the characteristic of slimming simultaneously concurrently by above-mentioned configuration.
Description of drawings
Fig. 1 first embodiment of the invention optical system synoptic diagram.
The aberration curve figure of Fig. 2 first embodiment of the invention.
Fig. 3 second embodiment of the invention optical system synoptic diagram.
The aberration curve figure of Fig. 4 second embodiment of the invention.
Fig. 5 third embodiment of the invention optical system synoptic diagram.
The aberration curve figure of Fig. 6 third embodiment of the invention.
Fig. 7 is a table one, is the first embodiment of the invention structured data.
Fig. 8 is a table two, is the first embodiment of the invention aspherical surface data.
Fig. 9 is a table three, is the second embodiment of the invention structured data.
Figure 10 is a table four, is the second embodiment of the invention aspherical surface data.
Figure 11 is a table five, the third embodiment of the invention structured data.
Figure 12 is a table six, is the third embodiment of the invention aspherical surface data.
Figure 13 is a table seven, is the numeric data of the corresponding correlated condition formula of various embodiments of the present invention.
Drawing reference numeral
First lens 100,300,500
Front surface 101,301,501
Rear surface 102,302,502
Second lens 110,310,510
Front surface 111,311,511
Rear surface 112,312,512
Aperture 120,320,520
Infrared fileter 130,330,530
Photo-sensitive cell cover glass 140,340,540
Imaging surface 150,350,550
The focal distance f of whole thin photographic optical lens group
The focal distance f 1 of first lens
The focal distance f 2 of second lens
First index of refraction in lens N1
The first lens Abbe number V1
The second lens Abbe number V2
The front surface radius of curvature R 1 of first lens
The rear surface radius of curvature R 2 of first lens
The front surface radius of curvature R 3 of second lens
The rear surface radius of curvature R 4 of second lens
The thickness of first lens on optical axis is CT1
The thickness of second lens on optical axis is CT2
First lens and the distance of second lens on optical axis are T12
The optics total length TTL of thin photographic optical lens group
The maximum imaging height ImgH of thin photographic optical lens group
Embodiment
About structure, technical characterictic and the effect of thin photographic optical lens group of the present invention, details are as follows:
In thin photographic optical lens group of the present invention, the focal length of whole thin photographic optical lens group is f, and the focal length of first lens is f1, and it satisfies routine relational expression down:
0.80＜f/f1＜1.50；
When f/f1 satisfies the above-mentioned relation formula, the refracting power size configure of first lens is balance comparatively, can be than the optics total length of effective control system, keep the target of slimming, and can avoid the excessive increase of high-order spherical aberration (High Order Spherical Aberration) and coma (Coma) simultaneously, and then promote image quality; Furthermore, f/f1 satisfies the routine down comparatively ideal that concerns then:
1.00＜f/f1＜1.30。
In thin photographic optical lens group of the present invention, the focal length of whole thin photographic optical lens group is f, and the focal length of second lens is f2, and it satisfies routine relational expression down:
-0.45＜f/f2＜0.00；
When f/f2 satisfied the above-mentioned relation formula, the aberration (ChromaticAberration) that can help update the system was poor with the image planes receipts.Furthermore, routine relational expression was then comparatively desirable under f/f2 satisfied:
-0.15＜f/f2＜0.00；
Further, routine relational expression was then even more ideal under f/f2 satisfied:
-0.08＜f/f2＜0.00。
In thin photographic optical lens group of the present invention, the front surface radius-of-curvature of first lens is R1, and the rear surface radius-of-curvature of first lens is R2, and it satisfies routine relational expression down:
0.45＜R1/R2＜0.70；
When R1/R2 satisfies the above-mentioned relation formula, can help the correction of spherical aberration in the thin photographic optical lens group (Spherical Aberration); Furthermore, R1/R2 satisfies the routine down comparatively ideal that concerns then:
0.50＜R1/R2＜0.60。
In thin photographic optical lens group of the present invention, the front surface radius-of-curvature of second lens is R3, and the rear surface radius-of-curvature of second lens is R4, and it satisfies routine relational expression down:
0.05＜R3/R4＜0.92；
When R3/R4 satisfies the above-mentioned relation formula, can help the correction of aberration in the thin photographic optical lens group, and the optics total length of simultaneously effective control system; Furthermore, example concerns then comparatively desirable to make R3/R4 satisfy down:
0.73＜R3/R4＜0.92。
In thin photographic optical lens group of the present invention, first lens of the positive refracting power of tool, its refractive index is N1, it satisfies routine relational expression down:
1.50＜N1＜1.59；
Above-mentioned relation helps first lens and obtain better coupling on the optics plastic cement material, can make the thin photographic optical lens group obtain preferable image quality.
In thin photographic optical lens group of the present invention, the first lens Abbe number is V1, and it satisfies routine relational expression down:
50.0＜V1；
When V1 satisfies the above-mentioned relation formula, can help the correction of aberration in the thin photographic optical lens group.
In the thin photographic optical lens group of the present invention, the mirror spacing between first lens and second lens is T12, and the focal length of whole thin photographic optical lens group is f, and it satisfies routine relational expression down:
0.05＜T12/f＜0.30；
When T12/f satisfies the ability that above-mentioned relation can help promoting thin photographic optical lens group correction higher order aberratons, and help keeping simultaneously the characteristic of system's slimming.Furthermore, T12/f satisfies the routine down comparatively ideal that concerns then:
0.12＜T12/f＜0.17。
In the thin photographic optical lens group of the present invention, the thickness of first lens on optical axis is CT1, and the thickness of second lens on optical axis is CT2, and it satisfies routine relational expression down:
1.50＜CT2/CT1＜2.20；
When satisfying above-mentioned relation, CT2/CT1 can help promoting the image quality of thin photographic optical lens group and have concurrently keeping lightening characteristic.
In the thin photographic optical lens group of the present invention, other is provided with a sense electronics optical element for the object imaging, the optics total length of thin photographic optical lens group is TTL, TTL is defined as in the thin photographic optical lens group the first lens front surface to the distance of imaging surface on optical axis, the maximum imaging of thin photographic optical lens group highly is ImgH, ImgH is defined as half of sense electronics optical element effective pixel area diagonal angle line length, and its pass is:
TTL/ImgH＜2.10；
When satisfying, TTL/ImgH goes up the characteristic that the note relation can be kept the miniaturization of thin photographic optical lens group; Furthermore, TTL/ImgH satisfies the routine down comparatively ideal that concerns then:
TTL/ImgH＜1.85。
Now enumerate preferred embodiment and be described as follows:
First embodiment:
First embodiment of the invention sees also Fig. 1, and the aberration curve of first embodiment sees also Fig. 2.The thin photographic optical lens group of first embodiment mainly is made of the lens of two pieces of tool refracting powers, is extremely comprised in regular turn as side by the thing side:
One aperture 120 places before first lens 100;
Other includes an infrared fileter 130 (IR Filter) and places after second lens 110; And one photo-sensitive cell cover glass 140 (Sensor Cover Glass) place after the infrared fileter 130, it does not influence the focal length of optical system of the present invention;
The equation of above-mentioned aspheric curve is expressed as follows:
Wherein:
X: be the point of Y apart from optical axis on the aspheric surface, itself and the relative height that is tangential on the tangent plane on summit on the aspheric surface optical axis;
Y: the point on the aspheric curve and the distance of optical axis;
K: conical surface coefficient;
Ai: i rank asphericity coefficient.
In the first embodiment thin photographic optical lens group, the focal length of whole thin photographic optical lens group is f, and the focal length of first lens 100 is f1, and the focal length of second lens 110 is f2, and its relational expression is:
f＝2.69mm；
f/f1＝1.20；
f/f2＝-0.04。
In the first embodiment thin photographic optical lens group, front surface 101 radius-of-curvature of first lens 100 are R1, rear surface 102 radius-of-curvature of first lens 100 are R2, front surface 111 radius-of-curvature of second lens 110 are R3, rear surface 112 radius-of-curvature of second lens 110 are R4, and its relational expression is:
R1/R2＝0.55；
R3/R4＝0.81。
In the first embodiment thin photographic optical lens group, first lens, 100 refractive indexes are N1, and its relational expression is:
N1＝1.543。
In the first embodiment thin photographic optical lens group, first lens, 100 Abbe numbers (Abbe Number) are V1, and second lens, 110 Abbe numbers are V2, and its relational expression is:
V1＝56.5；
|V1-V2|＝0.0。
In the first embodiment thin photographic optical lens group, first lens 100 and the distance of second lens 110 on optical axis are T12, and the focal length of whole thin photographic optical lens group is f, and its relational expression is:
T12/f＝0.14。
In the first embodiment thin photographic optical lens group, the thickness of first lens 100 on optical axis is CT1, and the thickness of second lens 110 on optical axis is CT2, and its relational expression is:
CT2/CT1＝1.62。
In the first embodiment thin photographic optical lens group, the thin photographic optical lens group is provided with a sense electronics optical element in addition for the object imaging, the optics total length of thin photographic optical lens group is TTL, and the maximum imaging of thin photographic optical lens group highly is ImgH, and its relational expression is:
TTL/ImgH＝2.04。
The detailed structured data of first embodiment is with shown in the table one, and its aspherical surface data is with shown in the table two, and wherein the unit of radius-of-curvature, thickness and focal length is mm, and HFOV is defined as half of maximum visual angle.
Second embodiment:
Second embodiment of the invention sees also Fig. 3, and the aberration curve of second embodiment sees also Fig. 4.The thin photographic optical lens group of second embodiment mainly is made of the lens of two pieces of tool refracting powers, is extremely comprised in regular turn as side by the thing side:
First lens 300 of the positive refracting power of one tool, its front surface 301 is a convex surface, and rear surface 302 is a concave surface, and its material is a plastic cement, and the first lens front surface 301, rear surface 302 are all aspheric surface;
Second lens 310 of the negative refracting power of one tool, its front surface 311 is a concave surface, and rear surface 312 is a convex surface, and its material is a plastic cement, and the second lens front surface 311, rear surface 312 are all aspheric surface;
One aperture 320 places before first lens 300;
The thin photographic optical lens group includes an infrared fileter 330 (IR Filter) in addition and places after second lens 310; And one photo-sensitive cell cover glass 340 (Sensor Cover Glass) place after the infrared fileter 330, it does not influence the focal length of optical system of the present invention;
Imaging surface 350 places after the photo-sensitive cell cover glass 340.
The equational expression of the second embodiment aspheric curve is as the pattern of first embodiment.
In the second embodiment thin photographic optical lens group, the focal length of whole thin photographic optical lens group is f, and the focal length of first lens 300 is f1, and the focal length of second lens 310 is f2, and its relational expression is:
f＝4.17mm；
f/f1＝1.19；
f/f2＝-0.34。
In the second embodiment thin photographic optical lens group, front surface 301 radius-of-curvature of first lens 300 are R1, rear surface 302 radius-of-curvature of first lens 300 are R2, front surface 311 radius-of-curvature of second lens 310 are R3, rear surface 312 radius-of-curvature of second lens 310 are R4, and its relational expression is:
R1/R2＝0.49；
R3/R4＝0.21。
In the second embodiment thin photographic optical lens group, first lens, 300 refractive indexes are N1, and its relational expression is:
N1＝1.543。
In the second embodiment thin photographic optical lens group, first lens, 300 Abbe numbers (Abbe Number) are V1, and second lens, 310 Abbe numbers are V2, and its relational expression is:
V1＝56.5；
|V1-V2|＝0.0。
In the second embodiment thin photographic optical lens group, first lens 300 and the distance of second lens 310 on optical axis are T12, and the focal length of whole thin photographic optical lens group is f, and its relational expression is:
T12/f＝0.18。
In the second embodiment thin photographic optical lens group, the thickness of first lens 300 on optical axis is CT1, and the thickness of second lens 310 on optical axis is CT2, and its relational expression is:
CT2/CT1＝1.62。
In the second embodiment thin photographic optical lens group, the thin photographic optical lens group is provided with a sense electronics optical element in addition for the object imaging, the optics total length of thin photographic optical lens group is TTL, and the maximum imaging of thin photographic optical lens group highly is ImgH, and its relational expression is:
TTL/ImgH＝1.84。
The detailed structured data of second embodiment is with shown in the table three, and its aspherical surface data is with shown in the table four, and wherein the unit of radius-of-curvature, thickness and focal length is mm, and HFOV is defined as half of maximum visual angle.
The 3rd embodiment:
Third embodiment of the invention sees also Fig. 5, and the aberration curve of the 3rd embodiment sees also Fig. 6.The thin photographic optical lens group of the 3rd embodiment mainly is made of the lens of two pieces of tool refracting powers, is extremely comprised in regular turn as side by the thing side:
First lens 500 of the positive refracting power of one tool, its front surface 501 is a convex surface, and rear surface 502 is a concave surface, and its material is a plastic cement, and the first lens front surface 501, rear surface 502 are all aspheric surface;
Second lens 510 of the negative refracting power of one tool, its front surface 511 is a concave surface, and rear surface 512 is a convex surface, and its material is a plastic cement, and the second lens front surface 511, rear surface 512 are all aspheric surface;
One aperture 520 places before first lens 500;
The thin photographic optical lens group includes an infrared fileter 530 (IR Filter) in addition and places after second lens 510; And one photo-sensitive cell cover glass 540 (Sensor Cover Glass) place after the infrared fileter 530, it does not influence the focal length of optical system of the present invention;
Imaging surface 550 places after the photo-sensitive cell cover glass 540.
The equational expression of the 3rd embodiment aspheric curve is as the pattern of first embodiment.
In the 3rd embodiment thin photographic optical lens group, the focal length of whole thin photographic optical lens group is f, and the focal length of first lens 500 is f1, and the focal length of second lens 510 is f2, and its relational expression is:
f＝3.53mm；
f/f1＝1.17；
f/f2＝-0.12。
In the 3rd embodiment thin photographic optical lens group, front surface 501 radius-of-curvature of first lens 500 are R1, rear surface 502 radius-of-curvature of first lens 500 are R2, front surface 511 radius-of-curvature of second lens 510 are R3, rear surface 512 radius-of-curvature of second lens 510 are R4, and its relational expression is:
R1/R2＝0.56；
R3/R4＝0.66。
In the 3rd embodiment thin photographic optical lens group, first lens, 500 refractive indexes are N1, and its relational expression is:
N1＝1.544。
In the 3rd embodiment thin photographic optical lens group, first lens, 500 Abbe numbers (Abbe Number) are V1, and second lens, 510 Abbe numbers are V2, and its relational expression is:
V1＝55.9；
|V1-V2|＝0.0。
In the 3rd embodiment thin photographic optical lens group, first lens 500 and the distance of second lens 510 on optical axis are T12, and the focal length of whole thin photographic optical lens group is f, and its relational expression is:
T12/f＝0.18。
In the 3rd embodiment thin photographic optical lens group, the thickness of first lens 500 on optical axis is CT1, and the thickness of second lens 510 on optical axis is CT2, and its relational expression is:
CT2/CT1＝1.99。
In the 3rd embodiment thin photographic optical lens group, the thin photographic optical lens group is provided with a sense electronics optical element in addition for the object imaging, the optics total length of thin photographic optical lens group is TTL, and the maximum imaging of thin photographic optical lens group highly is ImgH, and its relational expression is:
TTL/ImgH＝1.69。
The detailed structured data of the 3rd embodiment is with shown in the table five, and its aspherical surface data is with shown in the table six, and wherein the unit of radius-of-curvature, thickness and focal length is mm, and HFOV is defined as half of maximum visual angle.
Table one is depicted as the different numerical value change tables of thin photographic optical lens group embodiment of the present invention to table six (corresponding diagram 7 is to Figure 12 respectively); the all true gained of testing of numerical value change of right each embodiment of the present invention; even use different numerical value, the product of same structure must belong to protection category of the present invention.Table seven (corresponding Figure 13) is the numeric data of the corresponding correlate equation of the present invention of each embodiment.
In sum, the present invention is a kind of thin photographic optical lens group, and mirror group volume can be effectively dwindled in scioptics structure, arrangement mode and eyeglass configuration, more can obtain higher resolving power simultaneously; So " utilizability with industry " of the present invention should be unquestionable, in addition, the feature technology of being exposed at this case embodiment, all publications before application, had not also been seen, also be not disclosed use, not only has the fact of effect enhancement as mentioned above, have more can not be indiscreet and negligent additional effect, so " novelty " of the present invention and " creativeness " have all met the Patent Law rules, so propose the application of patent of invention in accordance with the law, request and give examination and grant quasi patent early, the true feeling moral just.
Claims (15)
1. a thin photographic optical lens group is characterized in that, described optical frames group is extremely comprised as side in regular turn by the thing side:
First lens of the positive refracting power of one tool, its front surface are that convex surface, rear surface are concave surface, and the forward and backward surface of first lens is all aspheric surface;
Second lens of the negative refracting power of one tool, its front surface is that concave surface, rear surface are convex surface, and the forward and backward surface of second lens is all aspheric surface; And
One aperture, it places before first lens; In the described thin photographic optical lens group, the first lens Abbe number is V1, and the second lens Abbe number is V2, and its relation satisfies: | V1-V2|＜15;
Wherein, the front surface radius-of-curvature of second lens is R3, and the rear surface radius-of-curvature of second lens is R4, satisfies relational expression: 0.05＜R3/R4＜0.92; Described thin photographic optical lens group is provided with a sense electronics optical element in addition for the object imaging, and the optics total length of thin photographic optical lens group is TTL, and the maximum imaging of thin photographic optical lens group is ImgH highly, satisfies relational expression: TTL/ImgH＜2.10; In the thin photographic optical lens group, the number of lenses of tool refracting power is restricted to two.
2. thin photographic optical lens group as claimed in claim 1 is characterized in that, first lens are plastic cement material, and second lens are plastic cement material.
3. thin photographic optical lens group as claimed in claim 2 is characterized in that, the focal length of whole thin photographic optical lens group is f, and the focal length of first lens is f1, and it satisfies routine relational expression down:
0.80＜f/f1＜1.50。
4. thin photographic optical lens group as claimed in claim 3 is characterized in that, the focal length of whole thin photographic optical lens group is f, and the focal length of first lens is f1, and it satisfies routine relational expression down:
1.00＜f/f1＜1.30。
5. thin photographic optical lens group as claimed in claim 2 is characterized in that, the focal length of whole thin photographic optical lens group is f, and the focal length of second lens is f2, and it satisfies routine relational expression down:
-0.45＜f/f2＜0.00。
6. thin photographic optical lens group as claimed in claim 5 is characterized in that, the focal length of whole thin photographic optical lens group is f, and the focal length of second lens is f2, and it satisfies routine relational expression down:
-0.15＜f/f2＜0.00。
7. thin photographic optical lens group as claimed in claim 6 is characterized in that, the focal length of whole thin photographic optical lens group is f, and the focal length of second lens is f2, and it satisfies routine relational expression down:
-0.08＜f/f2＜0.00。
8. thin photographic optical lens group as claimed in claim 2 is characterized in that, the front surface radius-of-curvature of first lens is R1, and the rear surface radius-of-curvature of first lens is R2, and it satisfies routine relational expression down:
0.45＜R1/R2＜0.70。
9. thin photographic optical lens group as claimed in claim 8 is characterized in that, the front surface radius-of-curvature of first lens is R1, and the rear surface radius-of-curvature of first lens is R2, and it satisfies routine relational expression down:
0.50＜R1/R2＜0.60。
10. thin photographic optical lens group as claimed in claim 1 is characterized in that, the front surface radius-of-curvature of second lens is R3, and the rear surface radius-of-curvature of second lens is R4, and it satisfies routine relational expression down:
0.73＜R3/R4＜0.92。
11. thin photographic optical lens group as claimed in claim 2 is characterized in that, first index of refraction in lens is N1, and the first lens Abbe number is V1, and it satisfies routine relational expression down:
1.50＜N1＜1.59；
50.0＜V1。
12. thin photographic optical lens group as claimed in claim 2 is characterized in that, first lens and the distance of second lens on optical axis are T12, and the focal length of whole thin photographic optical lens group is f, and it satisfies routine relational expression down:
0.05＜T12/f＜0.30。
13. thin photographic optical lens group as claimed in claim 12 is characterized in that, first lens and the distance of second lens on optical axis are T12, and the focal length of whole thin photographic optical lens group is f, and it satisfies routine relational expression down:
0.12＜T12/f＜0.17。
14. thin photographic optical lens group as claimed in claim 2 is characterized in that, the thickness of first lens on optical axis is CT1, and the thickness of second lens on optical axis is CT2, and it satisfies routine relational expression down:
1.5＜CT2/CT1＜2.2。
15. thin photographic optical lens group as claimed in claim 1, it is characterized in that, described thin photographic optical lens group is provided with a sense electronics optical element in addition for the object imaging, the optics total length of thin photographic optical lens group is TTL, the maximum imaging of thin photographic optical lens group highly is ImgH, and it satisfies the following relationship formula:
TTL/ImgH＜1.85。
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| CN2009101179056A CN101813819B (en) | 2009-02-23 | 2009-02-23 | Thin photographic optical lens group |
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| CN101813819B true CN101813819B (en) | 2011-10-05 |
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| CN2009101179056A Active CN101813819B (en) | 2009-02-23 | 2009-02-23 | Thin photographic optical lens group |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| TW201227036A (en) * | 2010-12-30 | 2012-07-01 | E Pin Optical Industry Co Ltd | Reading optical lens module |
| WO2018209891A1 (en) * | 2017-05-17 | 2018-11-22 | 浙江舜宇光学有限公司 | Iris camera lens |
| CN112394473A (en) * | 2019-08-12 | 2021-02-23 | 华为技术有限公司 | Optical lens, camera module and terminal |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101726830A (en) * | 2008-10-13 | 2010-06-09 | 一品光学工业股份有限公司 | Small-sized optical taking lens with short rear focus and two lenses |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101726830A (en) * | 2008-10-13 | 2010-06-09 | 一品光学工业股份有限公司 | Small-sized optical taking lens with short rear focus and two lenses |
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| JP特开2004-170460A 2004.06.17 |
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