CN101833160B - Image taking optical lens system - Google Patents
Image taking optical lens system Download PDFInfo
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- CN101833160B CN101833160B CN2009101184637A CN200910118463A CN101833160B CN 101833160 B CN101833160 B CN 101833160B CN 2009101184637 A CN2009101184637 A CN 2009101184637A CN 200910118463 A CN200910118463 A CN 200910118463A CN 101833160 B CN101833160 B CN 101833160B
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Abstract
The invention provides an image taking optical lens system. From an object side to an image side, the system sequentially comprises: a first lens with a positive refracting power, a second lens with a negative refracting power, and a third lens with a negative refracting power, wherein the front surface of the second lens is concave, while the rear surface is convex; the front and rear surfaces of the third lens are concave; and the third lens has a point of inflexion; and the front and rear surfaces of the second and third lenses are provided with non-spherical surfaces. The first lens can be a biconvex lens or a concavo-convex crescent-shaped lens; when the first lens is the biconvex lens, the refracting power of the first lens can be increased and the optical overall length of the system becomes shorter; and when the first lens is the concavo-convex crescent-shaped lens, the astigmatism of the system can be corrected. By using the image taking optical lens system, the astigmatism of the optical system is effectively corrected, and the imaging quality is improved; and the lens system has the characteristic of thinning.
Description
Technical field
The present invention is about a kind of shooting optical lens group; Particularly relevant for a kind of thin type photographing optical lens group that is applied to mobile phone camera.
Background technology
It is main that the conventional thin mobile lens adopts the two-piece type lens more; For example United States Patent (USP) the 7th; 436; Provided for No. 604, but owing to market constantly promotes for the requirement on slimming mobile phone camera pixel and the quality, so the two-piece type lens can't satisfy the more demand of the phtographic lens module of high-order.United States Patent (USP) the 7th; 436; A kind of imaging lens group that constitutes with three pieces of lens arrangements is provided for No. 603, and it to being first lens of the positive refracting power of a tool, second lens of the negative refracting power of a tool and the 3rd lens of the positive refracting power of a tool in regular turn as side, constitutes so-called Triplet pattern by the thing side.Form although it is so can be revised most aberration that this optical system produces, but its demand for the optics total length is bigger, causes lens construction must cooperate the optics total length and increases, so that be difficult to satisfy phtographic lens more frivolous, miniaturization and use.
Summary of the invention
The present invention provides a kind of shooting optical lens group, and it is extremely comprised as side by the thing side in regular turn: first lens of the positive refracting power of a tool; Second lens of the negative refracting power of one tool, its front surface are that concave surface, surface, back are convex surface, and its front surface, surface, back are provided with aspheric surface; The 3rd lens of the negative refracting power of one tool, its front surface, surface, back are all concave surface, and its front surface, surface, back be provided with aspheric surface, and the 3rd lens are provided with the point of inflexion; In addition, the present invention makes a video recording, and the lens number of tool refracting power is merely three in the optical lens group, and through above-mentioned configuration, effectively the aberration of revised version invention shooting optical lens group promotes image quality, and can have the characteristic of slimming simultaneously concurrently.
The present invention makes a video recording in the optical lens group, and first lens can be a biconvex lens or front surface is that convex surface, surface, back are the meniscus lens of concave surface; When first lens are biconvex lens, effectively strengthen the refracting power of first lens, and then make the make a video recording optics total length of optical lens group of the present invention become shorter; When first lens are convex-concave meniscus lens, help the astigmatism (Astigmatism) of revised version invention shooting optical lens group; And the negative refracting power of the present invention's the 3rd lens tool; And its front surface, surface, back are all concave surface; Make the present invention make a video recording the principal point (Principal Point) of optical lens group, and help shortening the make a video recording optics total length of optical lens group of the present invention, to keep the slimming of camera lens further from imaging surface.
According to an aspect of the present invention, the make a video recording center thickness of second lens of optical lens group of the present invention is CT2, and the focal length of whole shooting optical lens group is f, relational expressions below both satisfy:
0.03<CT2/f<0.16;
When CT2/f satisfies the above-mentioned relation formula, help the mouldability and the homogenieity of eyeglass plastic rubber ejaculate molding, and be beneficial to the optics total length that shortens optical system simultaneously.
According to a further aspect in the invention, the make a video recording abbe number (Abbe Number) of these first lens of optical lens group of the present invention is V1, relational expression below it satisfies:
V1<62;
When V1 satisfies the above-mentioned relation formula, help the astigmatism of revised version invention shooting optical lens group, improve the image quality of this shooting optical lens group.
In accordance with a further aspect of the present invention, the make a video recording front surface radius-of-curvature of first lens of optical lens group of the present invention is R1, and the back surface curvature radius of first lens is R2, relational expressions below both satisfy:
0<|R1/R2|<0.4;
When | when R1/R2| satisfies the above-mentioned relation formula, help the make a video recording correction of spherical aberration (Spherical Aberration) in the optical lens group of the present invention.
Description of drawings
Fig. 1 is the shooting optical lens group synoptic diagram according to first embodiment of the invention.
Fig. 2 is the aberration curve figure of first embodiment.
Fig. 3 is the shooting optical lens group synoptic diagram according to second embodiment of the invention.
Fig. 4 is the aberration curve figure of second embodiment.
Fig. 5 is the shooting optical lens group synoptic diagram according to third embodiment of the invention.
Fig. 6 is the aberration curve figure of the 3rd embodiment.
Fig. 7 is the shooting optical lens group synoptic diagram according to fourth embodiment of the invention.
Fig. 8 is the aberration curve figure of the 4th embodiment.
Fig. 9 is a table one, is the structured data of first embodiment.
Figure 10 is a table two, is the aspherical surface data of first embodiment.
Figure 11 is a table three, is the structured data of second embodiment.
Figure 12 is a table four, is the aspherical surface data of second embodiment.
Figure 13 is a table five, is the structured data of the 3rd embodiment.
Figure 14 A is table six A, and Figure 14 B is table six B, is the aspherical surface data of the 3rd embodiment.
Figure 15 is a table seven, is the structured data of the 4th embodiment.
Figure 16 A is table eight A, and Figure 16 B is table eight B, is the aspherical surface data of the 4th embodiment.
Figure 17 is a table nine, is the numerical data of correlated condition formula of the present invention.
Drawing reference numeral:
The 100----first lens 101----front surface
Surperficial 110----second lens behind the 102----
Surface behind the 111----front surface 112----
120----the 3rd lens 121----front surface
Surperficial 130----aperture behind the 122----
140----infrared ray filtering optical filter 150----imaging surface
The 300----first lens 301----front surface
Surperficial 310----second lens behind the 302----
Surface behind the 311----front surface 312----
320----the 3rd lens 321----front surface
Surperficial 330----aperture behind the 322----
340----infrared ray filtering optical filter 350----imaging surface
The 500----first lens 501----front surface
Surperficial 510----second lens behind the 502----
Surface behind the 511----front surface 512----
520----the 3rd lens 521----front surface
Surperficial 530----aperture behind the 522----
540----infrared ray filtering optical filter 550----imaging surface
The 700----first lens 701----front surface
Surperficial 710----second lens behind the 702----
Surface behind the 711----front surface 712----
720----the 3rd lens 721----front surface
Surperficial 730----aperture behind the 722----
740----infrared ray filtering optical filter 750----imaging surface
The focal distance f of whole shooting optical lens group
The focal distance f 1 of first lens
The focal distance f 2 of second lens
The focal distance f 3 of the 3rd lens
The abbe number V1 of first lens
The abbe number V2 of second lens
The thickness C T2 of second lens on optical axis
The thickness C T3 of the 3rd lens on optical axis
First lens and second lens on optical axis apart from T12
Second lens and the 3rd lens on optical axis apart from T23
The front surface radius of curvature R 1 of first lens
The back surface curvature radius R 2 of first lens
The front surface radius of curvature R 5 of the 3rd lens
The back surface curvature radius R 6 of the 3rd lens
The optics total length TTL of shooting optical lens group
The imaging height ImgH of shooting optical lens group
Embodiment
It is extremely comprised a kind of shooting optical lens group provided by the invention as side by the thing side in regular turn: first lens of the positive refracting power of a tool; Second lens of the negative refracting power of one tool, its front surface are that concave surface, surface, back are convex surface, and its front surface, surface, back are all aspheric surface; The 3rd lens of the negative refracting power of one tool, its front surface, surface, back are all concave surface, and its front surface, surface, back be all aspheric surface, and the 3rd lens are provided with the point of inflexion.The present invention makes a video recording in the optical lens group, and first lens can be a biconvex lens or front surface is that convex surface, surface, back are the meniscus lens of concave surface; When first lens are biconvex lens, effectively strengthen the refracting power of first lens, and then make the make a video recording optics total length of optical lens group of the present invention become shorter; When first lens are convex-concave meniscus lens, help the astigmatism (Astigmatism) of revised version invention shooting optical lens group; And the negative refracting power of the present invention's the 3rd lens tool; And its front surface, surface, back are all concave surface; Make the present invention make a video recording the principal point (Principal Point) of optical lens group, and help shortening the optics total length of this shooting optical lens group, to keep the slimming of camera lens further from imaging surface.
In shooting optical lens group of the present invention, when these first lens were a biconvex lens, the center thickness of second lens was CT2, and the focal length of whole shooting optical lens group is f, relational expression below both satisfy:
0.03<CT2/f<0.16;
When CT2/f satisfies the above-mentioned relation formula, help the mouldability and the homogenieity of eyeglass plastic rubber ejaculate molding, and help simultaneously shortening the make a video recording optics total length of optical lens group of the present invention.Particularly, the present invention make a video recording the center thickness CT2 of second lens of optical lens group satisfy below relational expression:
0.15mm<CT2<0.38mm。
In the aforementioned shooting optical lens group of the present invention, the focal length of first lens is f1, and the focal length of whole shooting optical lens group is f, relational expression below both satisfy:
1.30<f/f1<2.00;
When f/f1 satisfied the above-mentioned relation formula, the refracting power size configure of first lens is balance comparatively; Can more effectively control the make a video recording optics total length of optical lens group of the present invention, keep the target of miniaturization, and can avoid the excessive increase of high-order spherical aberration (High Order Spherical Aberration) and coma (Coma) simultaneously, promote image quality;
Further, the preferable f/f1 that makes of the present invention satisfies following relational expression:
1.45<f/f1<1.70。
In the aforementioned shooting optical lens group of the present invention, the focal length of second lens is f2, and the focal length of whole shooting optical lens group is f, relational expression below both satisfy:
-0.58<f/f2<-0.2;
When f/f2 satisfies the above-mentioned relation formula, can help the make a video recording aberration (Chromatic Aberration) of optical lens group of the present invention and revise.
In the aforementioned shooting optical lens group of the present invention, the front surface radius-of-curvature of first lens is R1, and the back surface curvature radius of first lens is R2, relational expression below both satisfy:
0<|R1/R2|<0.25;
When | when R1/R2| satisfies the above-mentioned relation formula, can help the make a video recording spherical aberration (Spherical Aberration) of optical lens group of the present invention and revise.
In the aforementioned shooting optical lens group of the present invention, the front surface radius-of-curvature of the 3rd lens is R5, and the back surface curvature radius of the 3rd lens is R6, relational expression below both satisfy:
R5/R6<-1.5;
When R5/R6 satisfies the above-mentioned relation formula, help the astigmatism (Astigmatism) of revised version invention shooting optical lens group and distort (Distortion), to promote image quality.
In the aforementioned shooting optical lens group of the present invention, the center thickness of the 3rd lens is CT3, relational expression below satisfying:
0.20<CT3/f<0.40;
When CT3/f satisfies the above-mentioned relation formula, help the astigmatism and the distortion of revised version invention shooting optical lens group, can avoid back focal length too short simultaneously, consequently not having enough spaces is provided with camera lens backend machine member.
In the aforementioned shooting optical lens group of the present invention, first lens and the distance of second lens on optical axis are T12, and second lens and the distance of the 3rd lens on optical axis are T23, relational expression below satisfying:
0.30<T12/T23<2.0;
When T12/T23 satisfies the above-mentioned relation formula, help the off-axis aberration of revised version invention shooting optical lens group.
In the aforementioned shooting optical lens group of the present invention, the abbe number of second lens (Abbe Number) is V2, relational expression below it satisfies:
V2<25;
When V2 satisfied the above-mentioned relation formula, effectively revised version was invented the aberration of shooting optical lens group, improved the resolving power (Resolution) of this shooting optical lens group.
In the aforementioned shooting optical lens group of the present invention; The object of this shooting optical lens group images in the sense electronics optical element; And the optics total length of this shooting optical lens group is TTL, and TTL is defined as the distance of first lens front surface to the imaging surface on optical axis in this shooting optical lens group, and the imaging of this shooting optical lens group highly is ImgH; ImgH is defined as the half the of this sense electronics optical element effective pixel area diagonal angle line length, relational expression below satisfying:
TTL/ImgH<1.90;
Last note relational expression can be kept the make a video recording characteristic of optical lens group miniaturization of the present invention.
On the other hand, in shooting optical lens group of the present invention, when these first lens were a biconvex lens, the abbe number of these first lens (Abbe Number) was V1, relational expression below it satisfies:
V1<62;
When V1 satisfies the above-mentioned relation formula, can help the astigmatism (Astigmatism) of revised version invention shooting optical lens group, improve the image quality of this shooting optical lens group.
In aforementioned shooting optical lens group of the present invention, the focal length of first lens is f1, and the focal length of whole shooting optical lens group is f, relational expression below both satisfy:
1.30<f/f1<2.00;
When f/f1 satisfied the above-mentioned relation formula, the refracting power size configure of first lens is balance comparatively; Can more effectively control the make a video recording optics total length of optical lens group of the present invention, keep the target of miniaturization, and can avoid the excessive increase of high-order spherical aberration (High Order Spherical Aberration) and coma (Coma) simultaneously, promote image quality;
Further, the preferable f/f1 that makes of the present invention satisfies following relational expression:
1.45<f/f1<1.70。
In the aforementioned shooting optical lens group of the present invention, the focal length of the 3rd lens is f3, and the focal length of whole shooting optical lens group is f, relational expression below both satisfy:
-0.70<f/f3<-0.45;
When f/f3 satisfies the above-mentioned relation formula; Can avoid the present invention to make a video recording in the optical lens group; The angle that light is incident on the photo-sensitive cell is excessive; Simultaneously can be so that principal point (PrincipalPoint) that should the shooting optical lens group further from imaging surface, and helps shortening the optics total length of this shooting optical lens group.
In the aforementioned shooting optical lens group of the present invention, the front surface radius-of-curvature of first lens is R1, and the back surface curvature radius of first lens is R2, relational expression below both satisfy:
0<|R1/R2|<0.25;
When | when R1/R2| satisfied the above-mentioned relation formula, the spherical aberration (Spherical Aberration) that can help the aforementioned shooting optical lens group of the present invention was revised.
In the aforementioned shooting optical lens group of the present invention, the front surface radius-of-curvature of the 3rd lens is R5, and the back surface curvature radius of the 3rd lens is R6, relational expression below both satisfy:
R5/R6<-1.5;
When R5/R6 satisfies the above-mentioned relation formula, help the astigmatism and the distortion (Distortion) of revised version invention shooting optical lens group, to promote image quality.
In the aforementioned shooting optical lens group of the present invention, the abbe number of second lens (Abbe Number) is V2, relational expression below it satisfies:
V2<25;
When V2 satisfies the above-mentioned relation formula, help revised version and invent the aberration of aforementioned shooting optical lens group (Chromatic Aberration), improve the resolving power (Resolution) of this shooting optical lens group.
In the aforementioned shooting optical lens group of the present invention; The object of this shooting optical lens group images in the sense electronics optical element; And the optics total length of this shooting optical lens group is TTL, and TTL is defined as the distance of first lens front surface to the imaging surface on optical axis in this shooting optical lens group, and the imaging of this shooting optical lens group highly is ImgH; ImgH is defined as the half the of this sense electronics optical element effective pixel area diagonal angle line length, relational expression below satisfying:
TTL/ImgH<1.90;
Last note relational expression can be kept the make a video recording characteristic of optical lens group miniaturization of the present invention.
On the other hand, in shooting optical lens group of the present invention, when these first lens were convex-concave meniscus lens, the front surface radius-of-curvature of first lens was R1, and the back surface curvature radius of first lens is R2, relational expression below both satisfy:
0<|R1/R2|<0.4;
When | when R1/R2| satisfies the above-mentioned relation formula, can help the make a video recording correction of spherical aberration (Spherical Aberration) in the optical lens group of the present invention.
In aforementioned shooting optical lens group of the present invention, the focal length of first lens is f1, and the focal length of whole shooting optical lens group is f, relational expression below both satisfy:
1.30<f/f1<2.00;
When f/f1 satisfied the above-mentioned relation formula, the refracting power size configure of first lens is balance comparatively; Can more effectively control the make a video recording optics total length of optical lens group of the present invention, keep the target of miniaturization, and can avoid the excessive increase of high-order spherical aberration (High Order Spherical Aberration) and coma (Coma) simultaneously, promote image quality;
Further, the preferable f/f1 that makes of the present invention satisfies following relational expression:
1.45<f/f1<1.70。
In the aforementioned shooting optical lens group of the present invention, the focal length of the 3rd lens is f3, and the focal length of whole shooting optical lens group is f, relational expression below both satisfy:
-0.70<f/f3<-0.45;
When f/f3 satisfies the above-mentioned relation formula; Can avoid the present invention to make a video recording in the optical lens group; The angle that light is incident on the photo-sensitive cell is excessive; Simultaneously can be so that principal point (PrincipalPoint) that should the shooting optical lens group further from imaging surface, and helps shortening the optics total length of this shooting optical lens group.
In the aforementioned shooting optical lens group of the present invention, the abbe number of first lens (Abbe Number) is V1, relational expression below it satisfies:
V1<62。
When V1 satisfies the above-mentioned relation formula, can help the astigmatism (Astigmatism) of revised version invention shooting optical lens group, improve the image quality of this shooting optical lens group.
In the aforementioned shooting optical lens group of the present invention, the abbe number of second lens is V2, relational expression below it satisfies:
V2<25;
When V2 satisfied the above-mentioned relation formula, effectively revised version was invented the aberration (Chromatic Aberration) of aforementioned shooting optical lens group, and then improved the resolving power (Resolution) of this shooting optical lens group.
In the aforementioned shooting optical lens group of the present invention, the front surface radius-of-curvature of the 3rd lens is R5, and the back surface curvature radius of the 3rd lens is R6, relational expression below both satisfy:
R5/R6<-1.5。
When R5/R6 satisfies the above-mentioned relation formula, help the astigmatism and the distortion (Distortion) of revised version invention shooting optical lens group, to promote image quality.
In the aforementioned shooting optical lens group of the present invention; The object of this shooting optical lens group images in the sense electronics optical element; And the optics total length of this shooting optical lens group is TTL, and TTL is defined as the distance of first lens front surface to the imaging surface on optical axis in this shooting optical lens group, and the imaging of this shooting optical lens group highly is ImgH; ImgH is defined as the half the of this sense electronics optical element effective pixel area diagonal angle line length, relational expression below satisfying:
TTL/ImgH<1.80;
Last note relational expression can be kept the make a video recording characteristic of optical lens group miniaturization of the present invention.
The present invention's optical lens group of making a video recording provides powerful positive refracting power through first lens; And aperture is placed the object side near this shooting optical lens group; With making the outgoing pupil (Exit Pupil) of this shooting optical lens group away from imaging surface, therefore, light will be incident on the mode near vertical incidence on the photo-sensitive cell; This is the heart far away (Telecentric) characteristic of picture side; This characteristic is very important for the photoperceptivity of solid-state photo-sensitive cell at present, with making the sensitization susceptibility of photo-sensitive cell improve, reduces the present invention's optical lens group of making a video recording and produces the possibility at dark angle.The present invention is provided with the point of inflexion (InflectionPoint) at the 3rd lens, and the light that can more effectively suppress from the axle visual field is incident in the angle on the photo-sensitive cell.
In addition, in the wide-angle optical system, need do correction to distorting (Distortion) and multiplying power look receipts poor (Chromatic Aberration of Magnification) especially, its method is for to place system light flexion equilibrium of forces place with aperture.The present invention then focuses on the characteristic of the heart far away if aperture is placed before first lens, and the optics total length of system can be shorter; If aperture is placed between first lens and second lens, then focus on the characteristic of Wide-angle, simultaneously, so configuration of aperture position can effectively reduce the susceptibility of system.
In shooting optical lens group 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 lens material is a plastic cement, then can effectively reduce production costs.In addition, 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 make a video recording optics total length of optical lens group of the present invention.
Shooting optical lens group of the present invention will cooperate appended graphic the detailed description through following specific embodiment.
First embodiment of the invention sees also Fig. 1, and the aberration curve of first embodiment sees also Fig. 2.The lens that the shooting optical lens group of first embodiment is mainly constructed by three pieces of tool refracting powers constitute; By the thing side extremely be in regular turn: first lens 100 of the positive refracting power of a tool as side; Its front surface 101 is a convex surface; Surface, back 102 is a convex surface, and its material is a plastic cement, and its front surface 101, surface, back 102 are all aspheric surface; Second lens 110 of the negative refracting power of one tool, its front surface 111 is a concave surface, surperficial 112 convex surfaces in back, its material is a plastic cement, its front surface 111, surface, back 112 are all aspheric surface; The 3rd lens 120 of the negative refracting power of one tool, its front surface 121 is a concave surface, and surface, back 122 is a concave surface, and its material is a plastic cement, and its front surface 121, surface, back 122 are all aspheric surface, and surface, back 122 is provided with the point of inflexion; One aperture 130 is positioned at before first lens 100; Comprise an infrared ray filtering optical filter 140 (IR Filter) in addition and place after the 3rd lens 120, it does not influence the make a video recording focal length of optical lens group of the present invention; And an imaging surface 150 is located at after this infrared ray filtering optical filter 140.
The equation of aforementioned aspheric curve is represented 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.
First embodiment makes a video recording in the optical lens group; The focal length of first lens 100 is f1, and the focal length of second lens 110 is f2, and the focal length of the 3rd lens 120 is f3; The focal length of whole shooting optical lens group is f, and its relational expression is: f/f1=1.60, f/f2=-0.40, f/f3=-0.53.
First embodiment makes a video recording in the optical lens group; Front surface 101 radius-of-curvature of first lens 100 are R1; Back surperficial 102 radius-of-curvature of first lens 100 are R2; Front surface 121 radius-of-curvature of the 3rd lens 120 are R5, and back surperficial 122 radius-of-curvature of the 3rd lens 120 are R6, and its relation is: | R1/R2|=0.04, R5/R6=-8.51.
First embodiment makes a video recording in the optical lens group, and the thickness of second lens 110 on optical axis is CT2, and the thickness of the 3rd lens 120 on optical axis is CT3, and its relation is: CT2=0.372mm, CT2/f=0.10, CT3/f=0.29.
First embodiment makes a video recording in the optical lens group, and the abbe number of first lens 100 (Abbe Number) is V1, and the abbe number of second lens 110 is V2, wherein: V1=55.9, V2=23.4.
First embodiment makes a video recording in the optical lens group, and first lens 100 and second lens 110 are that T12, second lens 110 and the distance of the 3rd lens 120 on optical axis are T23 in the distance on the optical axis, and its relation is: T12/T23=0.56.
First embodiment makes a video recording in the optical lens group, and the optics total length of shooting optical lens group is TTL, and the imaging of shooting optical lens group highly be ImgH, and its relation is TTL/ImgH=1.78.
The detailed structured data of first embodiment is shown in table one, and its aspherical surface data is shown in table two, and wherein the unit of radius-of-curvature, thickness and focal length is mm, and HFOV is defined as the half the of maximum visual angle.
Second embodiment of the invention sees also Fig. 3, and the aberration curve of second embodiment sees also Fig. 4.The lens that the shooting optical lens group of second embodiment is mainly constructed by three pieces of tool refracting powers constitute; By the thing side extremely be in regular turn: first lens 300 of the positive refracting power of a tool as side; Its front surface 301 is a convex surface; Surface, back 302 is a convex surface, and its material is a plastic cement, and its front surface 301, surface, back 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 surface, back 312 is a convex surface, and its material is a plastic cement, and its front surface 311, surface, back 312 are all aspheric surface; The 3rd lens 320 of the negative refracting power of one tool, its front surface 321 is a concave surface, and surface, back 322 is a concave surface, and its material is a plastic cement, and its front surface 321, surface, back 322 are all aspheric surface, and surface, back 322 is provided with the point of inflexion; One aperture 330 is positioned at before first lens 300; Comprise an infrared ray filtering optical filter 340 (IR Filter) in addition and place after the 3rd lens 320, it does not influence the make a video recording focal length of optical lens group of the present invention; And an imaging surface 350 is located at after this infrared ray filtering optical filter 340.
The equational expression of the second embodiment aspheric curve is as the form of first embodiment.
Second embodiment makes a video recording in the optical lens group; The focal length of first lens 300 is f1, and the focal length of second lens 310 is f2, and the focal length of the 3rd lens 320 is f3; The focal length of whole shooting optical lens group is f, and its relational expression is: f/f1=1.96, f/f2=-0.61, f/f3=-0.80.
Second embodiment makes a video recording in the optical lens group; Front surface 301 radius-of-curvature of first lens 300 are R1; Back surperficial 302 radius-of-curvature of first lens 300 are R2; Front surface 321 radius-of-curvature of the 3rd lens 320 are R5, and back surperficial 322 radius-of-curvature of the 3rd lens 320 are R6, and its relation is: R1/R2=|0.72|, R5/R6=-6.94.
Second embodiment makes a video recording in the optical lens group, and the thickness of second lens 310 on optical axis is CT2, and the thickness of the 3rd lens 320 on optical axis is CT3, and its relation is: CT2=0.599m, CT2/f=0.16, CT3/f=0.25.
Second embodiment makes a video recording in the optical lens group, and the abbe number of first lens 300 (Abbe Number) is V1, and the abbe number of second lens 310 is V2, wherein: V1=55.9, V2=23.4.
Second embodiment makes a video recording in the optical lens group, and first lens 300 and second lens 310 are that T12, second lens 310 and the distance of the 3rd lens 320 on optical axis are T23 in the distance on the optical axis, and its relation is: T12/T23=0.50.
Second embodiment makes a video recording in the optical lens group, and the optics total length of shooting optical lens group is TTL, and the imaging of shooting optical lens group highly be ImgH, and its relation is TTL/ImgH=1.87.
The detailed structured data of second embodiment is shown in table three, and its aspherical surface data is shown in table four, and wherein the unit of radius-of-curvature, thickness and focal length is mm, and HFOV is defined as the half the of maximum visual angle.
Third embodiment of the invention sees also Fig. 5, and the aberration curve of the 3rd embodiment sees also Fig. 6.The lens that the shooting optical lens group of the 3rd embodiment is mainly constructed by three pieces of tool refracting powers constitute; By the thing side extremely be in regular turn: first lens 500 of the positive refracting power of a tool as side; Its front surface 501 is a convex surface; Surface, back 502 is a convex surface, and its material is a plastic cement, and its front surface 501, surface, back 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 surface, back 512 is a convex surface, and its material is a plastic cement, and its front surface 511, surface, back 512 are all aspheric surface; The 3rd lens 520 of the negative refracting power of one tool, its front surface 521 be a concave surface, surface, back 522 be a concave surface, its material is a plastic cement, its front surface 521, surface, back 522 are all aspheric surface, and front surface 521, after surperficial 522 all be provided with the point of inflexion; One aperture 530 is positioned at before first lens 500; Comprise an infrared ray filtering optical filter 540 (IR Filter) in addition and place after the 3rd lens 520, it does not influence the make a video recording focal length of optical lens group of the present invention; And an imaging surface 550 is located at after this infrared ray filtering optical filter 540.
The equational expression of the 3rd embodiment aspheric curve is as the form of first embodiment.
The 3rd embodiment makes a video recording in the optical lens group; The focal length of first lens 500 is f1, and the focal length of second lens 510 is f2, and the focal length of the 3rd lens 520 is f3; The focal length of whole shooting optical lens group is f, and its relational expression is: f/f1=1.59, f/f2=-0.33, f/f3=-0.64.
The 3rd embodiment makes a video recording in the optical lens group; Front surface 501 radius-of-curvature of first lens 500 are R1; Back surperficial 502 radius-of-curvature of first lens 500 are R2; Front surface 521 radius-of-curvature of the 3rd lens 520 are R5, and back surperficial 522 radius-of-curvature of the 3rd lens 520 are R6, and its relation is: | R1/R2|=0.07, R5/R6=-2.08.
The 3rd embodiment makes a video recording in the optical lens group, and the thickness of second lens 510 on optical axis is CT2, and the thickness of the 3rd lens 520 on optical axis is CT3, and its relation is: CT2=0.325mm, CT2/f=0.09, CT3/f=0.29.
The 3rd embodiment makes a video recording in the optical lens group, and the abbe number of first lens 500 (Abbe Number) is V1, and the abbe number of second lens 510 is V2, wherein: V1=55.9, V2=23.4.
The 3rd embodiment makes a video recording in the optical lens group, and first lens 500 and second lens 510 are that T12, second lens 510 and the distance of the 3rd lens 520 on optical axis are T23 in the distance on the optical axis, and its relation is: T12/T23=0.50.
The 3rd embodiment makes a video recording in the optical lens group, and the optics total length of shooting optical lens group is TTL, and the imaging of shooting optical lens group highly be ImgH, and its relation is TTL/ImgH=1.70.
The detailed structured data of the 3rd embodiment is shown in table five, and its aspherical surface data is shown in table six A and table six B, and wherein the unit of radius-of-curvature, thickness and focal length is mm, and HFOV is defined as the half the of maximum visual angle.
Fourth embodiment of the invention sees also Fig. 7, and the aberration curve of the 4th embodiment sees also Fig. 8.The lens that the shooting optical lens group of the 4th embodiment is mainly constructed by three pieces of tool refracting powers constitute; By the thing side extremely be in regular turn: first lens 700 of the positive refracting power of a tool as side; Its front surface 701 is a convex surface; Surface, back 702 is a concave surface, and its material is a plastic cement, and its front surface 701, surface, back 702 are all aspheric surface; Second lens 710 of the negative refracting power of one tool, its front surface 711 is a concave surface, and surface, back 712 is a convex surface, and its material is a plastic cement, and its front surface 711, surface, back 712 are all aspheric surface; The 3rd lens 720 of the negative refracting power of one tool, its front surface 721 be a concave surface, surface, back 722 be a concave surface, its material is a plastic cement, its front surface 721, surface, back 722 are all aspheric surface, and front surface 721, after surperficial 722 all be provided with the point of inflexion; One aperture 730 is positioned at before first lens 700; Comprise an infrared ray filtering optical filter 740 (IR Filter) in addition and place the 3rd lens 720) afterwards, it does not influence the make a video recording focal length of optical lens group of the present invention; And an imaging surface 750 is located at after this infrared ray filtering optical filter 740.
The equational expression of the 4th embodiment aspheric curve is as the form of first embodiment.
The 4th embodiment makes a video recording in the optical lens group; The focal length of first lens 700 is f1, and the focal length of second lens 710 is f2, and the focal length of the 3rd lens 720 is f3; The focal length of whole shooting optical lens group is f, and its relational expression is: f/f1=1.52, f/f2=-0.28, f/f3=-0.57.
The 4th embodiment makes a video recording in the optical lens group; Front surface 701 radius-of-curvature of first lens 700 are R1; Back surperficial 702 radius-of-curvature of first lens 700 are R2; Front surface 721 radius-of-curvature of the 3rd lens 720 are R5, and back surperficial 722 radius-of-curvature of the 3rd lens 720 are R6, and its relation is: | R1/R2|=0.02, R5/R6=-5.36.
The 4th embodiment makes a video recording in the optical lens group, and the thickness of second lens 710 on optical axis is CT2, and the thickness of the 3rd lens 720 on optical axis is CT3, and its relation is: CT2=0.320mm, CT2/f=0.09, CT3/f=0.26.
The 4th embodiment makes a video recording in the optical lens group, and the abbe number of first lens 700 (Abbe Number) is V1, and the abbe number of second lens 710 is V2, wherein: V1=55.9, V2=23.4.
The 4th embodiment makes a video recording in the optical lens group, and first lens 700 and second lens 710 are that T12, second lens 710 and the distance of the 3rd lens 720 on optical axis are T23 in the distance on the optical axis, and its relation is: T12/T23=0.50.
The 4th embodiment makes a video recording in the optical lens group, and the optics total length of shooting optical lens group is TTL, and the imaging of shooting optical lens group highly be ImgH, and its relation is TTL/ImgH=1.66.
The detailed structured data of the 4th embodiment is shown in table seven, and its aspherical surface data is shown in table eight A and table eight B, and wherein the unit of radius-of-curvature, thickness and focal length is mm, and HFOV is defined as the half the of maximum visual angle.
Table one to table eight B is depicted as the make a video recording different numerical value change tables of optical lens group embodiment of the present invention, and the numerical value change of right each embodiment of the present invention is all true tests gained, even use different numerical value, the product of same structure must belong to protection category of the present invention.Table nine is the numerical data of the corresponding correlated condition formula of the present invention of each embodiment.
The present invention is a shooting optical lens group, through the effective aberration of revised version invention shooting optical lens group of said lens structure and configuration mode, promotes image quality, and the while also helps the make a video recording slimming of optical lens group of the present invention.
Claims (21)
1. a shooting optical lens group is characterized in that, is extremely comprised in regular turn as side by the thing side:
First lens of the positive refracting power of one tool, its front surface, surface, back are all convex surface;
Second lens of the negative refracting power of one tool, its front surface are that concave surface, surface, back are convex surface, and its front surface, surface, back are all aspheric surface; And
The 3rd lens of the negative refracting power of one tool, its front surface, surface, back are all concave surface, and its front surface, surface, back are all aspheric surface, and the 3rd lens are provided with the point of inflexion;
In the wherein said shooting optical lens group, the thickness of said second lens on optical axis is CT2, and the focal length of whole shooting optical lens group is f, the front surface radius-of-curvature of said first lens be R1 and thereafter the surface curvature radius be R2, relational expression below satisfying:
0.03<CT2/f<0.16; And
0<|R1/R2|<0.25。
2. shooting optical lens group as claimed in claim 1 is characterized in that, said second lens and said the 3rd lens are plastic cement material.
3. shooting optical lens group as claimed in claim 1 is characterized in that, the lens of tool refracting power are merely said first lens, said second lens and said the 3rd lens.
4. shooting optical lens group as claimed in claim 3 is characterized in that, an aperture is arranged at before said first lens.
5. shooting optical lens group as claimed in claim 4 is characterized in that, the focal length of said first lens is f1, relational expression below satisfying:
1.30<f/f1<2.00。
6. shooting optical lens group as claimed in claim 5 is characterized in that, the focal length of said second lens is f2, relational expression below satisfying:
1.45<f/f1<1.70; And
-0.58<f/f2<-0.2。
7. shooting optical lens group as claimed in claim 4 is characterized in that, the front surface radius-of-curvature of said the 3rd lens be R5 and thereafter the surface curvature radius be R6, relational expression below satisfying:
R5/R6<-1.5。
8. shooting optical lens group as claimed in claim 4 is characterized in that, the thickness of said the 3rd lens on optical axis is CT3, relational expression below satisfying:
0.20<CT3/f<0.40。
9. shooting optical lens group as claimed in claim 8 is characterized in that, said first lens and the distance of said second lens on optical axis are T12, and reaching said second lens and the distance of said the 3rd lens on optical axis is T23, relational expression below satisfying:
0.3<T12/T23<2.0。
10. shooting optical lens group as claimed in claim 4 is characterized in that, the abbe number of said second lens is V2, relational expression below satisfying:
V2<25。
11. shooting optical lens group as claimed in claim 3 is characterized in that, the thickness of said second lens on optical axis is CT2, relational expression below satisfying:
0.15mm<CT2<0.38mm。
12. shooting optical lens group as claimed in claim 3; It is characterized in that the object of said shooting optical lens group images in the sense electronics optical element, and the optics total length of said shooting optical lens group is TTL; The imaging of said shooting optical lens group highly is ImgH; TTL is defined as the distance of first lens front surface to the imaging surface on optical axis in this shooting optical lens group, and ImgH is defined as the half the of this sense electronics optical element effective pixel area diagonal angle line length, relational expression below satisfying:
TTL/ImgH<1.90。
13. a shooting optical lens group is characterized in that, is extremely comprised in regular turn as side by the thing side:
First lens of the positive refracting power of one tool, its front surface, surface, back are all convex surface;
Second lens of the negative refracting power of one tool, its front surface are that concave surface, surface, back are convex surface, and its front surface, surface, back are all aspheric surface; And
The 3rd lens of the negative refracting power of one tool, its front surface, surface, back are all concave surface, and its front surface, surface, back are all aspheric surface, and the 3rd lens are provided with the point of inflexion;
The abbe number of wherein said first lens is V1, the front surface radius-of-curvature of said first lens be R1 and thereafter the surface curvature radius be R2, relational expression below satisfying:
V1<62; And
0<|R1/R2|<0.25。
14. shooting optical lens group as claimed in claim 13 is characterized in that, said second lens and said the 3rd lens are plastic cement material.
15. shooting optical lens group as claimed in claim 13 is characterized in that, the lens of tool refracting power are merely said first lens, said second lens and said the 3rd lens.
16. shooting optical lens group as claimed in claim 15 is characterized in that, an aperture is arranged at before said first lens.
17. shooting optical lens group as claimed in claim 16 is characterized in that, the focal length of said first lens is f1, and the focal length of whole shooting optical lens group is f, relational expression below satisfying:
1.30<f/f1<2.00。
18. shooting optical lens group as claimed in claim 17 is characterized in that, the focal length of said the 3rd lens is f3, relational expression below satisfying:
1.45<f/f1<1.70; And
-0.70<f/f3<-0.45。
19. shooting optical lens group as claimed in claim 16 is characterized in that, the front surface radius-of-curvature of said the 3rd lens be R5 and thereafter the surface curvature radius be R6, relational expression below satisfying:
R5/R6<-1.5。
20. shooting optical lens group as claimed in claim 15 is characterized in that, the abbe number of said second lens is V2, relational expression below satisfying:
V2<25。
21. shooting optical lens group as claimed in claim 15; It is characterized in that the object of said shooting optical lens group images in the sense electronics optical element, and the optics total length of said shooting optical lens group is TTL; The imaging of said shooting optical lens group highly is ImgH; TTL is defined as the distance of first lens front surface to the imaging surface on optical axis in this shooting optical lens group, and ImgH is defined as the half the of this sense electronics optical element effective pixel area diagonal angle line length, relational expression below satisfying:
TTL/ImgH<1.90。
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CN102566013B (en) * | 2010-12-15 | 2014-06-11 | 大立光电股份有限公司 | Optical photographing system |
CN103135198B (en) * | 2011-11-24 | 2016-03-02 | 比亚迪股份有限公司 | A kind of optical lens assembly |
TWI557463B (en) * | 2014-12-03 | 2016-11-11 | 先進光電科技股份有限公司 | Optical image capturing system |
KR20160069087A (en) * | 2014-12-05 | 2016-06-16 | 에이에이씨 어쿠스틱 테크놀로지스 (심천) 컴퍼니 리미티드 | Compact Imaging Lens System |
CN106772944A (en) * | 2017-01-18 | 2017-05-31 | 厦门颉轩光电有限公司 | Endoscope-use wide-angle camera group |
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