CN102221738A - Thin-type image capture lens - Google Patents
Thin-type image capture lens Download PDFInfo
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- CN102221738A CN102221738A CN 201010161574 CN201010161574A CN102221738A CN 102221738 A CN102221738 A CN 102221738A CN 201010161574 CN201010161574 CN 201010161574 CN 201010161574 A CN201010161574 A CN 201010161574A CN 102221738 A CN102221738 A CN 102221738A
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Abstract
The invention discloses a thin- type image capture lens. The lens sequentially comprises, from the object side to the image side, a first lens possessing a positive flexion force, a second lens possessing a negative flexion force and an aperture, wherein at least one surface of the object side surface and the image side surface of the first lens is aspheric, the object side surface and the image side surface of the second lens are both recessed and at least one surface of the object side surface and the image side surface of the second lens is aspheric, the aperture is arranged between the first lens and the second lens and the number of the lens possessing a flexion force in the thin- type image capture lens is two. According to the configuration mode of the lens set, the total length of the lens can be effectively shortened, the system susceptibility is reduced and a good imaging quality can be gained. According to the embodiment of the invention, the aperture is provided between the first lens and the second lens, the generation of system stray lights can be effectively reduced and a good balance between shortening the volume of the lens and reducing the system susceptibility is achieved.
Description
Technical field
The present invention relates to a kind of slimming sampling image lens, relate in particular to a kind of sampling image lens that is applied to the slimming image extraction module.
Background technology
Recent years, flourish along with image extraction module, the demand order of slimming phtographic lens gradually improves, and the photo-sensitive cell of general phtographic lens is nothing more than being sensitization coupling element (Charge CoupledDevice, CCD) or CMOS element (Complementary Metal-OxideSemiconductor Sensor, CMOS Sensor) two kind, and along with progressing greatly of semiconductor fabrication process technology, make the Pixel Dimensions of photo-sensitive cell dwindle, adding now, electronic product is a development trend with the good and compact external form of function, therefore, the slim phtographic lens that possesses good image quality becomes main flow in the market.
Traditional slimming sampling image lens is the revisal of considering 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, and therefore makes 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 rubber ejaculate molding make is bad.
In order effectively to reduce the camera lens total length and to take into account the yields that eyeglass is made, the phtographic lens that only contains two lens is feasible scheme.And in order to revise aberration, generally can adopt the form of preposition aperture, as United States Patent (USP) the 7th, 525, a kind of slimming sampling image lens that is made of two lens is provided for No. 741, but it adopts the configuration of preposition aperture can make that parasitic light increases, and easily causes the susceptibility of optical system to increase, and is comparatively difficult to the yields control on making.
In view of this, it is simple and easy and be unlikely to make the slimming sampling image lens that the camera lens total length is long and the optical system susceptibility is too high to be badly in need of a kind of manufacturing process.
Summary of the invention
The invention provides a kind of slimming sampling image lens, by the thing side to comprising in regular turn as side: first lens of the positive refracting power of a tool, its thing side surface be aspheric surface as at least one surface in the side surface; Second lens of the negative refracting power of one tool, its thing side surface are concave surface and are concave surface as side surface, and the thing side surface of these second lens be aspheric surface as at least one surface in the side surface; And an aperture, be arranged between these first lens and this second lens; The lens of tool refracting power are two in this slimming sampling image lens; Wherein, this slimming sampling image lens is provided with a sense electronics optical element for the object imaging thereon in addition, this aperture to the distance of this sense electronics optical element on optical axis is SL, the thing side surface of these first lens to the distance of this sense electronics optical element on optical axis is TTL, these second lens be Bf as side surface to the distance of this sense electronics optical element on optical axis, the focal length of whole slimming sampling image lens is f, satisfies following relationship formula: 0.58＜SL/TTL＜0.88; 0.18＜Bf/f＜0.60.
On the other hand, the invention provides a kind of slimming sampling image lens, extremely comprise in regular turn as side by the thing side: first lens of the positive refracting power of a tool, its thing side surface is a convex surface; Second lens of the negative refracting power of one tool, its thing side surface are concave surface and are concave surface as side surface, and at least one lens surface is an aspheric surface in these first lens and this second lens; And an aperture, be arranged between these first lens and this second lens; The lens of tool refracting power are two in this slimming sampling image lens; Wherein, this slimming sampling image lens is provided with a sense electronics optical element for the object imaging thereon in addition, this aperture to the distance of this sense electronics optical element on optical axis is SL, the thing side surface of these first lens to the distance of this sense electronics optical element on optical axis is TTL, the thing side surface radius-of-curvature of these first lens is R1, these first lens be R2 as the side surface radius-of-curvature, the abbe number of these first lens is V1, the abbe number of these second lens is V2, satisfies following relationship formula: 0.58＜SL/TTL＜0.88; | R1/R2|＜0.45; 23.0＜V1-V2＜46.0.
The present invention can effectively shorten total length, the reduction system sensitivity of camera lens, and can obtain good image quality by the configuration mode of above-mentioned mirror group.
In the slimming sampling image lens of the present invention, the positive refracting power of this first lens tool provides system main refracting power, helps to shorten the optics total length of system; This second lens tool is born refracting power, and the aberration that can be effectively first lens of the positive refracting power of tool be produced is done revisal, and helps the aberration of update the system simultaneously.
In the slimming sampling image lens of the present invention, these first lens can be a thing side surface to be convex surface and to be the crescent lens of concave surface or to be a biconvex lens as side surface; When these first lens are the crescent lens of a convex-concave, can help the astigmatism of update the system; When these first lens are a biconvex lens, then can effectively strengthen the refracting power of these first lens, and then make the optics total length of system become shorter.When these second lens are the biconcave lens of the negative refracting power of a tool, can effectively strengthen the negative refracting power of these second lens, help the aberration of update the system.
This aperture is arranged between these first lens and this second lens in the aforementioned slimming sampling image lens of the present invention, provides positive refracting power by these first lens, can effectively shorten the optics total length of this slimming sampling image lens.In the slimming sampling image lens of the present invention, this aperture is placed between these first lens and this second lens, can effectively reduce the generation of system's parasitic light, and can shorten the camera lens volume and reduce between the system sensitivity and obtain good balance.
Description of drawings
Figure 1A is the optical system synoptic diagram of first embodiment of the invention;
Figure 1B is the aberration curve figure of first embodiment of the invention;
Fig. 2 A is the optical system synoptic diagram of second embodiment of the invention;
Fig. 2 B is the aberration curve figure of second embodiment of the invention;
Fig. 3 A is the optical system synoptic diagram of third embodiment of the invention;
Fig. 3 B is the aberration curve figure of third embodiment of the invention;
Fig. 4 is a table one, is the optical data of first embodiment of the invention;
Fig. 5 is a table two, is the aspherical surface data of first embodiment of the invention;
Fig. 6 is a table three, is the optical data of second embodiment of the invention;
Fig. 7 is a table four, is the aspherical surface data of second embodiment of the invention;
Fig. 8 is a table five, is the optical data of third embodiment of the invention;
Fig. 9 is a table six, is the aspherical surface data of third embodiment of the invention;
Figure 10 is a table seven, is the numeric data of first embodiment of the invention to the three embodiment correlationship formulas.
Drawing reference numeral:
First lens 100,200,300
Thing side surface 101,201,301
Picture side surface 102,202,302
Second lens 110,210,310
Thing side surface 111,211,311
Picture side surface 112,212,312
Aperture 120,220,320
Infrared ray filtering optical filter 130,230,330
Imaging surface 140,240,340
The focal length of whole slimming sampling image lens is f
The focal length of first lens is f1
The focal length of second lens is f2
The abbe number of first lens is V1
The abbe number of second lens is V2
The thing side surface radius-of-curvature of first lens is R1
First lens be R2 as the side surface radius-of-curvature
The thing side surface radius-of-curvature of second lens is R3
Second lens be R4 as the side surface radius-of-curvature
The thickness of second lens on optical axis is CT2
Second lens be Bf as side surface to the distance of this sense electronics optical element on optical axis
Aperture to the distance of sense electronics optical element on optical axis is SL
The thing side surface of first lens to the distance of sense electronics optical element on optical axis is TTL
Half of sense electronics optical element effective pixel area diagonal angle line length is ImgH
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, the embodiment of the invention is described in further details below in conjunction with accompanying drawing.At this, illustrative examples of the present invention and explanation thereof are used to explain the present invention, but not as a limitation of the invention.
The invention provides a kind of slimming sampling image lens, by the thing side to comprising in regular turn as side: first lens of the positive refracting power of a tool, its thing side surface be aspheric surface as at least one surface in the side surface; Second lens of the negative refracting power of one tool, its thing side surface are concave surface and are concave surface as side surface, and the thing side surface of these second lens be aspheric surface as at least one surface in the side surface; And an aperture, be arranged between these first lens and this second lens; The lens of tool refracting power are two in this slimming sampling image lens; Wherein, this slimming sampling image lens is provided with a sense electronics optical element for the object imaging thereon in addition, this aperture to the distance of this sense electronics optical element on optical axis is SL, the thing side surface of these first lens to the distance of this sense electronics optical element on optical axis is TTL, these second lens be Bf as side surface to the distance of this sense electronics optical element on optical axis, the focal length of whole slimming sampling image lens is f, satisfies following relationship formula: 0.58＜SL/TTL＜0.88; 0.18＜Bf/f＜0.60.
When aforementioned slimming sampling image lens satisfies following relationship formula: 0.58＜SL/TTL＜0.88, can help shortening between camera lens volume and the reduction system sensitivity obtaining good balance.When aforementioned slimming sampling image lens satisfies following relationship formula: 0.18＜Bf/f＜0.60, can guarantee that this slimming sampling image lens has enough back focal length can place other member, and be unlikely to make the total length of camera lens long; Further, be preferably and satisfy following relationship formula: 0.20＜Bf/f＜0.35.
In the aforementioned slimming sampling image lens of the present invention, preferably, the thing side surface of these first lens is a convex surface, is beneficial to the configuration of strengthening this first lens refracting power, to shorten the camera lens total length; Further, be preferably the thing side surface that satisfies these first lens and be all convex surface as side surface.
In the aforementioned slimming sampling image lens of the present invention, preferably, the thing side surface of these first lens and be all aspheric surface as side surface, and the material of these first lens is a plastic cement, the thing side surface of these second lens and be all aspheric surface as side surface, and the material of these second lens is a plastic cement.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 that uses of reduction lens, so can effectively reduce the optics total length of slimming sampling image lens of the present invention; Material is a plastic cement, not only helps the making of non-spherical lens, more can effectively reduce production costs.
In the aforementioned slimming sampling image lens of the present invention, preferably, these second lens be provided with at least one point of inflexion as side surface, can more effectively suppress light and be incident on angle on this sense electronics optical element from the axle visual field.
In the aforementioned slimming sampling image lens of the present invention, the focal length of whole slimming sampling image lens is f, and the focal length of these lens is f1, preferably, is to satisfy following relationship formula: 1.0＜f/f1＜1.7.When f/f1 satisfies the above-mentioned relation formula, the refracting power size configure of these first lens is balance comparatively, the effective optics total length of control system, keep the characteristic of miniaturization, and can avoid the excessive increase of high-order spherical aberration (High OrderSpherical Aberration) simultaneously, and then promote image quality; Further, be preferably and satisfy following relationship formula: 1.2＜f/f1＜1.5.
In the aforementioned slimming sampling image lens of the present invention, the thickness of these second lens on optical axis is CT2, and the focal length of whole slimming sampling image lens is f, preferably, is to satisfy following relationship formula: 0.18＜CT2/f＜0.48.When CT2/f satisfies the above-mentioned relation formula, help mouldability and the homogenieity of eyeglass when plastic rubber ejaculate molding, to guarantee the slimming sampling image lens good image quality is arranged.
In the aforementioned slimming sampling image lens of the present invention, the thing side surface radius-of-curvature of these first lens is R1, these first lens be R2 as the side surface radius-of-curvature, preferably, be to satisfy the following relationship formula: | R1/R2|＜0.35.
When | when R1/R2| satisfies the above-mentioned relation formula, help the revisal of system's spherical aberration (Spherical Aberration).
In the aforementioned slimming sampling image lens of the present invention, the thing side surface radius-of-curvature of these second lens is R3, these second lens be R4 as the side surface radius-of-curvature, preferably, be to satisfy following relationship formula :-3.50＜R3/R4＜-0.15.When R3/R4 satisfies the above-mentioned relation formula, help the higher order aberratons of update the system.
In the aforementioned slimming sampling image lens of the present invention, the abbe number of these first lens is V1, and the abbe number of these second lens is V2, preferably, is to satisfy following relationship formula: 23.0＜V1-V2＜46.0.When V1-V2 satisfies the above-mentioned relation formula, help the correction of aberration in the slimming sampling image lens.
In the aforementioned slimming sampling image lens of the present invention, the thing side surface of these first lens to the distance of this sense electronics optical element on optical axis is TTL, and half of this sense electronics optical element effective pixel area diagonal angle line length is ImgH, preferably, is to satisfy following relationship formula: TTL/ImgH＜4.5.When TTL/ImgH satisfies the above-mentioned relation formula, help keeping the miniaturization of this slimming sampling image lens, to carry on frivolous portable electronic product.
On the other hand, the invention provides a kind of slimming sampling image lens, extremely comprise in regular turn as side by the thing side: first lens of the positive refracting power of a tool, its thing side surface is a convex surface; Second lens of the negative refracting power of one tool, its thing side surface are concave surface and are concave surface as side surface, and at least one lens surface is an aspheric surface in these first lens and this second lens; And an aperture, be arranged between these first lens and this second lens; The lens of tool refracting power are two in this slimming sampling image lens; Wherein, this slimming sampling image lens is provided with a sense electronics optical element for the object imaging thereon in addition, this aperture to the distance of this sense electronics optical element on optical axis is SL, the thing side surface of these first lens to the distance of this sense electronics optical element on optical axis is TTL, the thing side surface radius-of-curvature of these first lens is R1, these first lens be R2 as the side surface radius-of-curvature, the abbe number of these first lens is V1, the abbe number of these second lens is V2, satisfies following relationship formula: 0.58＜SL/TTL＜0.88;
|R1/R2|＜0.45；23.0＜V1-V2＜46.0。
When aforementioned slimming sampling image lens satisfies following relationship formula: 0.58＜SL/TTL＜0.88, can help shortening the camera lens volume and reducing between the system sensitivity and obtain good balance.When aforementioned slimming sampling image lens satisfies the following relationship formula: | R1/R2|＜0.45 helps the revisal of system's spherical aberration.When aforementioned slimming sampling image lens satisfies following relationship formula: 23.0＜V1-V2＜46.0, help the correction of aberration in the slimming sampling image lens; Further, be preferably and satisfy following relationship formula: 30.0＜V1-V2＜38.0.
In the aforementioned slimming sampling image lens of the present invention, the focal length of whole slimming sampling image lens is f, and the focal length of these first lens is f1, preferably, is to satisfy following relationship formula: 1.0＜f/f1＜1.7.When f/f1 satisfied the above-mentioned relation formula, the refracting power size configure of these first lens is balance comparatively, and effectively the optics total length of control system is kept the characteristic of miniaturization, and can avoid the excessive increase of high-order spherical aberration simultaneously, and then promoted image quality; Further, be preferably and satisfy following relationship formula: 1.2＜f/f1＜1.5.
In the aforementioned slimming sampling image lens of the present invention, the focal length of these first lens is f1, and the focal length of these second lens is f2, preferably, is to satisfy following relationship formula :-0.80＜f1/f2＜-0.45.When f1/f2 satisfied the above-mentioned relation formula, the refracting power of these first lens and these second lens disposed comparatively balance, can help the correction of aberration and the reduction of susceptibility.
In the aforementioned slimming sampling image lens of the present invention, the thing side surface radius-of-curvature of these second lens is R3, these second lens be R4 as the side surface radius-of-curvature, preferably, be to satisfy following relationship formula :-3.50＜R3/R4＜-0.15.When R3/R4 satisfies the above-mentioned relation formula, help the higher order aberratons of update the system.
In the aforementioned slimming sampling image lens of the present invention, these second lens be Bf as side surface to the distance of this sense electronics optical element on optical axis, the focal length of whole slimming sampling image lens is f, preferably, is to satisfy following relationship formula: 0.20＜Bf/f＜0.35.When Bf/f satisfies the above-mentioned relation formula, can guarantee that this slimming sampling image lens has enough back focal length can place other member, and be unlikely to make the total length of camera lens long.
In the slimming sampling image lens of the present invention, the material of lens can be glass or plastic cement, if the material of lens is a glass, then can increase the degree of freedom of system's refracting power configuration, if the material of lens is a plastic cement, then can effectively reduce production costs.In addition, also aspheric surface can be set on minute surface, aspheric surface can be made into the shape beyond the sphere easily, obtain more controlled variable, in order to subduing aberration, and then the number that uses of reduction lens, therefore can effectively reduce the optics total length of slimming sampling image lens of the present invention.
In the slimming sampling image lens of the present invention,, represent that then this lens surface is a convex surface at paraxial place if lens surface is a convex surface; If lens surface is a concave surface, represent that then this lens surface is a concave surface at paraxial place.
Slimming sampling image lens of the present invention will be described in detail by following specific embodiment conjunction with figs..
First embodiment:
First embodiment of the invention sees also Figure 1A, and the aberration curve of first embodiment sees also Figure 1B.The slimming sampling image lens of first embodiment mainly is made of two pieces of lens, is extremely comprised in regular turn as side by the thing side:
First lens 100 of the positive refracting power of one tool, its thing side surface 101 are that convex surface and picture side surface 102 are concave surface, and its material is a plastic cement, the thing side surface 101 of these first lens 100 and be all aspheric surface as side surface 102;
Second lens 110 of the negative refracting power of one tool, its thing side surface 111 is that concave surface and picture side surface 112 are concave surface, its material is a plastic cement, the thing side surface 111 of these second lens 110 and be all aspheric surface as side surface 112, these second lens 110 be provided with at least one point of inflexion as side surface 112; And
One aperture 120 is arranged between these first lens 100 and this second lens 110;
Other includes an infrared ray filtering optical filter (IR-filter) 130 and places looking like between a side surface 112 and the imaging surface 140 of these second lens 110; The material of this infrared ray filtering optical filter 130 is that glass and its do not influence the focal length of this slimming sampling image lens 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 slimming sampling image lens, the focal length of whole slimming sampling image lens is f, and its relational expression is: f=5.63 (millimeter).
In the first embodiment slimming sampling image lens, the f-number of whole slimming sampling image lens (f-number) is Fno, and its relational expression is: Fno=2.80.
In the first embodiment slimming sampling image lens, half of maximum visual angle is HFOV in the whole slimming sampling image lens, and its relational expression is: HFOV=14.2 (degree).
In the first embodiment slimming sampling image lens, this aperture 120 is SL to the distance of this sense electronics optical element on optical axis, and the thing side surface 101 of these first lens 100 is TTL to the distance of this sense electronics optical element on optical axis, and its relational expression is: SL/TTL=0.68.
In the first embodiment slimming sampling image lens, these second lens be Bf as side surface to the distance of this sense electronics optical element on optical axis, the focal length of whole slimming sampling image lens is f, its relational expression is: Bf/f=0.24.
In the first embodiment slimming sampling image lens, the focal length of whole slimming sampling image lens is f, and the focal length of these first lens 100 is f1, and its relational expression is: f/f1=1.47.
In the first embodiment slimming sampling image lens, the focal length of these first lens 100 is f1, and the focal length of these second lens 110 is f2, and its relational expression is: f1/f2=-0.76.
In the first embodiment slimming sampling image lens, the thickness of these second lens 110 on optical axis is CT2, and the focal length of whole slimming sampling image lens is f, and its relational expression is: CT2/f=0.44.
In the first embodiment slimming sampling image lens, the thing side surface radius-of-curvature of these first lens 100 is R1, these first lens 100 be R2 as the side surface radius-of-curvature, its relational expression is: | R1/R2|=0.33.
In the first embodiment slimming sampling image lens, the thing side surface radius-of-curvature of these second lens 110 is R3, these second lens 110 be R4 as the side surface radius-of-curvature, its relational expression is: R3/R4=-0.49.
In the first embodiment slimming sampling image lens, the abbe number of these first lens 100 is V1, and the abbe number of these second lens 110 is V2, and its relational expression is: V1-V2=33.4.
In the first embodiment slimming sampling image lens, this slimming sampling image lens is provided with a sense electronics optical element at these imaging surface 140 places for the object imaging thereon in addition, the thing side surface 101 of these first lens 100 to the distance of this sense electronics optical element on optical axis is TTL, and half of this sense electronics optical element effective pixel area diagonal angle line length is ImgH, and its relational expression is: TTL/ImgH=4.12.
The detailed optical data of first embodiment is shown in Fig. 4 table one, and its aspherical surface data is shown in Fig. 5 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. 2 A, and the aberration curve of second embodiment sees also Fig. 2 B.The slimming sampling image lens of second embodiment mainly is made of two pieces of lens, is extremely comprised in regular turn as side by the thing side:
One aperture 220 is arranged between these first lens 200 and this second lens 210;
Other includes an infrared ray filtering optical filter 230 and places looking like between a side surface 212 and the imaging surface 240 of these second lens 210; The material of this infrared ray filtering optical filter 230 is that glass and its do not influence the focal length of this slimming sampling image lens of the present invention.
The equational expression of the second embodiment aspheric curve is as the pattern of first embodiment.
In the second embodiment slimming sampling image lens, the focal length of whole slimming sampling image lens is f, and its relational expression is: f=3.69 (millimeter).
In the second embodiment slimming sampling image lens, the f-number of whole slimming sampling image lens is Fno, and its relational expression is: Fno=2.80.
In the second embodiment slimming sampling image lens, half of maximum visual angle is HFOV in the whole slimming sampling image lens, and its relational expression is: HFOV=21.3 (degree).
In the second embodiment slimming sampling image lens, this aperture 220 is SL to the distance of this sense electronics optical element on optical axis, and the thing side surface 201 of these first lens 200 is TTL to the distance of this sense electronics optical element on optical axis, and its relational expression is: SL/TTL=0.85.
In the second embodiment slimming sampling image lens, these second lens be Bf as side surface to the distance of this sense electronics optical element on optical axis, the focal length of whole slimming sampling image lens is f, its relational expression is: Bf/f=0.30.
In the second embodiment slimming sampling image lens, the focal length of whole slimming sampling image lens is f, and the focal length of these first lens 200 is f1, and its relational expression is: f/f1=1.25.
In the second embodiment slimming sampling image lens, the focal length of these first lens 200 is f1, and the focal length of these second lens 210 is f2, and its relational expression is: f1/f2=-0.56.
In the second embodiment slimming sampling image lens, the thickness of these second lens 210 on optical axis is CT2, and the focal length of whole slimming sampling image lens is f, and its relational expression is: CT2/f=0.22.
In the second embodiment slimming sampling image lens, the thing side surface radius-of-curvature of these first lens 200 is R1, these first lens 200 be R2 as the side surface radius-of-curvature, its relational expression is: | R1/R2|=0.10.
In the second embodiment slimming sampling image lens, the thing side surface radius-of-curvature of these second lens 210 is R3, these second lens 210 be R4 as the side surface radius-of-curvature, its relational expression is: R3/R4=-3.00.
In the second embodiment slimming sampling image lens, the abbe number of these first lens 200 is V1, and the abbe number of these second lens 210 is V2, and its relational expression is: V1-V2=25.7.
In the second embodiment slimming sampling image lens, this slimming sampling image lens is provided with a sense electronics optical element at these imaging surface 240 places for the object imaging thereon in addition, the thing side surface 201 of these first lens 200 to the distance of this sense electronics optical element on optical axis is TTL, and half of this sense electronics optical element effective pixel area diagonal angle line length is ImgH, and its relational expression is: TTL/ImgH=2.55.
The detailed optical data of second embodiment is shown in Fig. 6 table three, and its aspherical surface data is shown in Fig. 7 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. 3 A, and the aberration curve of the 3rd embodiment sees also Fig. 3 B.The slimming sampling image lens of the 3rd embodiment mainly is made of two pieces of lens, is extremely comprised in regular turn as side by the thing side:
First lens 300 of the positive refracting power of one tool, its thing side surface 301 are that convex surface and picture side surface 302 are convex surface, and its material is a plastic cement, the thing side surface 301 of these first lens 300 and be all aspheric surface as side surface 302;
Second lens 310 of the negative refracting power of one tool, its thing side surface 311 is that concave surface and picture side surface 312 are concave surface, its material is a plastic cement, the thing side surface 311 of these second lens 310 and be all aspheric surface as side surface 312, these second lens 310 be provided with at least one point of inflexion as side surface 312; And
One aperture 320 is arranged between these first lens 300 and this second lens 310;
Other includes an infrared ray filtering optical filter 330 and places looking like between a side surface 312 and the imaging surface 340 of these second lens 310; The material of this infrared ray filtering optical filter 330 is that glass and its do not influence the focal length of this slimming sampling image lens of the present invention.
The equational expression of the 3rd embodiment aspheric curve is as the pattern of first embodiment.
In the 3rd embodiment slimming sampling image lens, the focal length of whole slimming sampling image lens is f, and its relational expression is: f=3.86 (millimeter).
In the 3rd embodiment slimming sampling image lens, the f-number of whole slimming sampling image lens is Fno, and its relational expression is: Fno=2.45.
In the 3rd embodiment slimming sampling image lens, half of maximum visual angle is HFOV in the whole slimming sampling image lens, and its relational expression is: HFOV=20.5 (degree).
In the 3rd embodiment slimming sampling image lens, this aperture 320 is SL to the distance of this sense electronics optical element on optical axis, and the thing side surface 301 of these first lens 300 is TTL to the distance of this sense electronics optical element on optical axis, and its relational expression is: SL/TTL=0.77.
In the 3rd embodiment slimming sampling image lens, these second lens be Bf as side surface to the distance of this sense electronics optical element on optical axis, the focal length of whole slimming sampling image lens is f, its relational expression is: Bf/f=0.29.
In the 3rd embodiment slimming sampling image lens, the focal length of whole slimming sampling image lens is f, and the focal length of these first lens 300 is f1, and its relational expression is: f/f1=1.24.
In the 3rd embodiment slimming sampling image lens, the focal length of these first lens 300 is f1, and the focal length of these second lens 310 is f2, and its relational expression is: f1/f2=-0.50.
In the 3rd embodiment slimming sampling image lens, the thickness of these second lens 310 on optical axis is CT2, and the focal length of whole slimming sampling image lens is f, and its relational expression is: CT2/f=0.41.
In the 3rd embodiment slimming sampling image lens, the thing side surface radius-of-curvature of these first lens 300 is R1, these first lens 300 be R2 as the side surface radius-of-curvature, its relational expression is: | R1/R2|=0.17.
In the 3rd embodiment slimming sampling image lens, the thing side surface radius-of-curvature of these second lens 310 is R3, these second lens 310 be R4 as the side surface radius-of-curvature, its relational expression is: R3/R4=-2.07.
In the 3rd embodiment slimming sampling image lens, the abbe number of these first lens 300 is V1, and the abbe number of these second lens 310 is V2, and its relational expression is: V1-V2=32.5.
In the 3rd embodiment slimming sampling image lens, this slimming sampling image lens is provided with a sense electronics optical element at these imaging surface 340 places for the object imaging thereon in addition, the thing side surface 301 of these first lens 300 to the distance of this sense electronics optical element on optical axis is TTL, and half of this sense electronics optical element effective pixel area diagonal angle line length is ImgH, and its relational expression is: TTL/ImgH=3.12.
The detailed optical data of the 3rd embodiment is shown in Fig. 8 table five, and its aspherical surface data is shown in Fig. 9 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 slimming sampling image lens embodiment of the present invention to table six (corresponding diagram 4 is to Fig. 9 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; so above explanation is described and accompanying drawing only as exemplary, non-in order to limit claim of the present invention.Table seven (corresponding Figure 10) is the numeric data of the corresponding correlationship formula of the present invention of each embodiment.
Above-described specific embodiment; purpose of the present invention, technical scheme and beneficial effect are further described; institute is understood that; the above only is specific embodiments of the invention; and be not intended to limit the scope of the invention; within the spirit and principles in the present invention all, any modification of being made, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (20)
1. a slimming sampling image lens is characterized in that, described slimming sampling image lens is extremely comprised as side in regular turn by the thing side:
First lens of the positive refracting power of one tool, its thing side surface be aspheric surface as at least one surface in the side surface;
Second lens of the negative refracting power of one tool, its thing side surface are concave surface and are concave surface as side surface, and the thing side surface of described second lens be aspheric surface as at least one surface in the side surface;
One aperture is arranged between described first lens and described second lens;
The lens of tool refracting power are two in the wherein said slimming sampling image lens;
Wherein, described slimming sampling image lens is provided with a sense electronics optical element in addition for the object imaging, described aperture to the distance of described sense electronics optical element on optical axis is SL, the thing side surface of described first lens to the distance of described sense electronics optical element on optical axis is TTL, described second lens as side surface to the distance of described sense electronics optical element on optical axis be Bf, the focal length of whole slimming sampling image lens is f, satisfies the following relationship formula:
0.58＜SL/TTL＜0.88；
0.18＜Bf/f＜0.60。
2. slimming sampling image lens as claimed in claim 1, it is characterized in that, the thing side surface of described first lens and be all aspheric surface as side surface, and the material of described first lens is a plastic cement, the thing side surface of described second lens and be all aspheric surface as side surface, and the material of described second lens is a plastic cement.
3. slimming sampling image lens as claimed in claim 2 is characterized in that, described second lens be provided with at least one point of inflexion as side surface.
4. slimming sampling image lens as claimed in claim 1 is characterized in that, the thing side surface of described first lens is a convex surface.
5. slimming sampling image lens as claimed in claim 4 is characterized in that, the focal length of whole slimming sampling image lens is f, and the focal length of described first lens is f1, satisfies the following relationship formula:
1.0＜f/f1＜1.7。
6. slimming sampling image lens as claimed in claim 5 is characterized in that, the focal length of whole slimming sampling image lens is f, and the focal length of described first lens is f1, satisfies the following relationship formula:
1.2＜f/f1＜1.5。
7. slimming sampling image lens as claimed in claim 5 is characterized in that, the thickness of described second lens on optical axis is CT2, and the focal length of whole slimming sampling image lens is f, satisfies the following relationship formula:
0.18＜CT2/f＜0.48。
8. slimming sampling image lens as claimed in claim 4 is characterized in that, the thing side surface radius-of-curvature of described first lens is R1, described first lens be R2 as the side surface radius-of-curvature, satisfy the following relationship formula:
|R1/R2|＜0.35。
9. slimming sampling image lens as claimed in claim 2 is characterized in that, the thing side surface radius-of-curvature of described second lens is R3, described second lens be R4 as the side surface radius-of-curvature, satisfy the following relationship formula:
-3.50＜R3/R4＜-0.15。
10. slimming sampling image lens as claimed in claim 9 is characterized in that, the abbe number of described first lens is V1, and the abbe number of described second lens is V2, satisfies the following relationship formula:
23.0＜V1-V2＜46.0。
11. slimming sampling image lens as claimed in claim 4 is characterized in that, described second lens as side surface to the distance of described sense electronics optical element on optical axis be Bf, the focal length of whole slimming sampling image lens is f, satisfies the following relationship formula:
0.20＜Bf/f＜0.35。
12. slimming sampling image lens as claimed in claim 4 is characterized in that, described first lens be convex surface as side surface.
13. slimming sampling image lens as claimed in claim 1, it is characterized in that, the thing side surface of described first lens to the distance of described sense electronics optical element on optical axis is TTL, and half of described sense electronics optical element effective pixel area diagonal angle line length is ImgH, satisfies the following relationship formula:
TTL/ImgH＜4.5。
14. a slimming sampling image lens is characterized in that, described slimming sampling image lens is extremely comprised as side in regular turn by the thing side:
First lens of the positive refracting power of one tool, its thing side surface is a convex surface;
Second lens of the negative refracting power of one tool, its thing side surface are concave surface and are concave surface as side surface, and at least one lens surface is an aspheric surface in described first lens and described second lens;
One aperture is arranged between described first lens and described second lens;
The lens of tool refracting power are two in the wherein said slimming sampling image lens;
Wherein, described slimming sampling image lens is provided with a sense electronics optical element in addition for the object imaging, described aperture to the distance of described sense electronics optical element on optical axis is SL, the thing side surface of described first lens to the distance of described sense electronics optical element on optical axis is TTL, the thing side surface radius-of-curvature of described first lens is R1, described first lens be R2 as the side surface radius-of-curvature, the abbe number of described first lens is V1, the abbe number of described second lens is V2, satisfies the following relationship formula:
0.58＜SL/TTL＜0.88；
|R1/R2|＜0.45；
23.0＜V1-V2＜46.0。
15. slimming sampling image lens as claimed in claim 14 is characterized in that, the focal length of whole slimming sampling image lens is f, and the focal length of described first lens is f1, satisfies the following relationship formula:
1.0＜f/f1＜1.7。
16. slimming sampling image lens as claimed in claim 15 is characterized in that, the focal length of whole slimming sampling image lens is f, and the focal length of described first lens is f1, satisfies the following relationship formula:
1.2＜f/f1＜1.5。
17. slimming sampling image lens as claimed in claim 15 is characterized in that, the focal length of described first lens is f1, and the focal length of described second lens is f2, satisfies the following relationship formula:
-0.80＜f1/f2＜-0.45。
18. slimming sampling image lens as claimed in claim 17 is characterized in that, the thing side surface radius-of-curvature of described second lens is R3, described second lens be R4 as the side surface radius-of-curvature, satisfy the following relationship formula:
-3.50＜R3/R4＜-0.15。
19. slimming sampling image lens as claimed in claim 14 is characterized in that, the abbe number of described first lens is V1, and the abbe number of described second lens is V2, satisfies the following relationship formula:
30.0＜V1-V2＜38.0。
20. slimming sampling image lens as claimed in claim 14 is characterized in that, described second lens as side surface to the distance of described sense electronics optical element on optical axis be Bf, the focal length of whole slimming sampling image lens is f, satisfies the following relationship formula:
0.20＜Bf/f＜0.35。
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| CN103323931A (en) * | 2012-03-20 | 2013-09-25 | 大立光电股份有限公司 | Optical lens assembly |
| CN105866923A (en) * | 2015-09-18 | 2016-08-17 | 瑞声科技(新加坡)有限公司 | Camera lens |
| CN112130295A (en) * | 2020-11-02 | 2020-12-25 | 中山市众盈光学有限公司 | Small-caliber infrared identification lens |
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| JP2004020996A (en) * | 2002-06-18 | 2004-01-22 | Nissei Denki Kogyo Kk | Lens for imaging |
| JP2009098492A (en) * | 2007-10-18 | 2009-05-07 | Konica Minolta Opto Inc | Imaging lens, imaging apparatus, and digital device |
| CN100587540C (en) * | 2007-06-13 | 2010-02-03 | 大立光电股份有限公司 | Thin type photographing lens set |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2004020996A (en) * | 2002-06-18 | 2004-01-22 | Nissei Denki Kogyo Kk | Lens for imaging |
| CN100587540C (en) * | 2007-06-13 | 2010-02-03 | 大立光电股份有限公司 | Thin type photographing lens set |
| JP2009098492A (en) * | 2007-10-18 | 2009-05-07 | Konica Minolta Opto Inc | Imaging lens, imaging apparatus, and digital device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103323931A (en) * | 2012-03-20 | 2013-09-25 | 大立光电股份有限公司 | Optical lens assembly |
| US9019631B2 (en) | 2012-03-20 | 2015-04-28 | Largan Precision Co., Ltd. | Optical lens assembly |
| CN103323931B (en) * | 2012-03-20 | 2015-07-15 | 大立光电股份有限公司 | Optical lens assembly |
| CN105866923A (en) * | 2015-09-18 | 2016-08-17 | 瑞声科技(新加坡)有限公司 | Camera lens |
| CN112130295A (en) * | 2020-11-02 | 2020-12-25 | 中山市众盈光学有限公司 | Small-caliber infrared identification lens |
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