CN102375221B - Optical photographic lens group - Google Patents
Optical photographic lens group Download PDFInfo
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- CN102375221B CN102375221B CN 201010262799 CN201010262799A CN102375221B CN 102375221 B CN102375221 B CN 102375221B CN 201010262799 CN201010262799 CN 201010262799 CN 201010262799 A CN201010262799 A CN 201010262799A CN 102375221 B CN102375221 B CN 102375221B
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Abstract
The invention provides an optical photographic lens group. From an object side to an image side, the optical photographic lens group sequentially comprises a first lens with positive refractive power, a second lens with negative refractive power, a third lens with a positive refractive power and a fourth lens with negative refractive power, wherein the object-side surface of the first lens is convex and at least one of the object-side surface and the image-side surface of the first lens is aspherical; the image-side surface of the second lens is concave; the object-side surface of the third lens is concave and the image-side surface of the third lens is convex; and the image-side surface of the fourth lens is concave, the object-side surface and the image-side surface of the fourth lens are aspherical, and at least one inflection point is arranged on the image-side surface of the fourth lens. The optical photographic lens group is additionally provided with a stop and an electronic photosensitive device for the imaging of a photographed object, wherein the stop is arranged between the photographed object and the first lens and the electronic photosensitive device is arranged an imaging surface. Moreover, the optical photographic lens group additionally comprises another stop which is arranged between the second lens and the fourth lens.
Description
Technical field
The invention relates to a kind of optical photographic lens group; Particularly about a kind of miniaturization optical photographic lens group that is applied on portable type electronic product.
Background technology
recent years, rise along with the portable type electronic product with camera function, the demand of miniaturization phtographic lens day by day improves, and the photo-sensitive cell of general phtographic lens is nothing more than being sensitization coupling element (Charge Coupled Device, CCD) or complementary matal-oxide semiconductor element (ComplementaryMetal-Oxide Semiconductor Sensor, CMOS Sensor) two kinds, and along with progressing greatly of technology, make the Pixel Dimensions of photo-sensitive cell dwindle, the miniaturization phtographic lens is gradually toward the field development of high pixel, therefore, requirement to image quality also increases day by day.
It is main that the optical system that tradition is applied to the miniaturization phtographic lens adopts the three-chip type lens arrangement more, lens combination is from the thing side to the first lens that is sequentially a positive refracting power of tool as side, the second lens of the negative refracting power of a tool and the 3rd lens of a positive refracting power of tool, consist of so-called Triplet pattern, as United States Patent (USP) the 7th, shown in 145, No. 736.But prevailing due to high standard mobile devices such as intelligent mobile phone (Smart Phone) and PDA (Personal DigitalAssistant), driven miniaturization phtographic lens riseing rapidly on pixel and image quality, existing three-chip type lens combination can't satisfy the more phtographic lens module of high-order.
United States Patent (USP) the 7th, 365, disclosed a kind of four-piece type lens combination for No. 920, the first lens of this lens combination and the second lens are bonded to each other and become doublet (Doublet) with two sheet glass spherical mirrors, in order to color difference eliminating, but the method has its shortcoming, one, too much glass spherical mirror configuration makes degree of freedom in system not enough, causes the total length of system to be difficult for shortening; Its two, the bonding technique of glass mirror is difficult for, and easily forms the difficulty on making.In addition, electronic product is constantly toward high-performance and lightening trend development, the size that makes phtographic lens is more done to heal little and specification is more done higher, the mirror group must be done closely the eyeglass configuration in limited space, will easily cause the inessential light of part to affect the image quality of camera lens through repeatedly refraction, reflection in the mirror group.
In view of this, be badly in need of a kind of being applicable on frivolous, portable type electronic product, image quality is good and be unlikely to the optical photographic lens group that makes the camera lens total length long.
Summary of the invention
the invention provides a kind of optical photographic lens group, by the thing side to sequentially comprising as side: the first lens of a positive refracting power of tool, its thing side surface is convex surface, the thing side surface of this first lens be aspheric surface as at least one surface in side surface, the second lens of the negative refracting power of one tool, it is concave surface as side surface, the 3rd lens of the one positive refracting power of tool, its thing side surface are concave surface and are convex surface as side surface, and the 4th lens of the negative refracting power of a tool, it is concave surface as side surface, the thing side surface of the 4th lens and be all aspheric surface as side surface, and the 4th lens as being provided with at least one point of inflexion on side surface, wherein, this optical photographic lens group separately is provided with Yi Guanglan (Stop) and supplies the object imaging with a sense electronics optical element, this light hurdle is placed between object and this first lens, this sense electronics optical element is placed in the imaging surface place, and this optical photographic lens group more includes another light hurdle and is arranged between these second lens and the 4th lens, half of this sense electronics optical element effective pixel area diagonal line length is ImgH, this light hurdle between these second lens and the 4th lens, its to the distance of this sense electronics optical element on optical axis be LS, half of its diameter of bore is YS, the thing side surface of its thing side direction adjacent lens to this light hurdle distance on optical axis is DS, the thing side surface of its thing side direction adjacent lens to the distance on optical axis as side surface as the side direction adjacent lens is DL, the focal length of whole optical photographic lens group is f, the focal length of the 3rd lens is f3, the focal length of the 4th lens is f4, thing side surface to the distance on optical axis as side surface that is bordering on most as the tool refracting power lens of side that is bordering on most the tool refracting power lens of thing side in this optical photographic lens group is Td, the abbe number of this first lens (AbbeNumber) is V1, the abbe number of these the second lens is V2, satisfy lower note relational expression:
(ImgH-0.7*LS)/ImgH＜YS/ImgH＜0.74；
0.10＜DS/DL＜0.73；
1.35＜f/f3＜2.50；
-2.60＜f/f4＜-1.75；
0.85＜Td/f＜0.92; And
20.0＜V1-V2＜42.0。
on the other hand, the invention provides a kind of optical photographic lens group, extremely sequentially comprised as side by the thing side: the first lens of a positive refracting power of tool, its thing side surface is convex surface, the second lens of the negative refracting power of one tool, it is concave surface as side surface, the 3rd lens of the one positive refracting power of tool, its thing side surface are concave surface and are convex surface as side surface, the thing side surface of the 3rd lens and be all aspheric surface as side surface, and the 4th lens of the negative refracting power of a tool, it is concave surface as side surface, the thing side surface of the 4th lens and be all aspheric surface as side surface, and the 4th lens as being provided with at least one point of inflexion on side surface, wherein, this optical photographic lens group separately is provided with a Guang Lan and a sense electronics optical element supplies the object imaging, this light hurdle is placed between object and this first lens, this sense electronics optical element is placed in the imaging surface place, and this optical photographic lens group more includes another light hurdle and is arranged between these second lens and the 3rd lens, half of this sense electronics optical element effective pixel area diagonal line length is ImgH, this light hurdle between these second lens and the 3rd lens, its to the distance of this sense electronics optical element on optical axis be LS, half of its diameter of bore is YS, the thing side surface of its thing side direction adjacent lens to this light hurdle distance on optical axis is DS, the thing side surface of its thing side direction adjacent lens to the distance on optical axis as side surface as the side direction adjacent lens is DL, the focal length of whole optical photographic lens group is f, the focal length of the 3rd lens is f3, the focal length of the 4th lens is f4, the abbe number of this first lens is V1, the abbe number of these the second lens is V2, satisfy lower note relational expression:
(ImgH-0.7*LS)/ImgH＜YS/ImgH＜0.74；
0.10＜DS/DL＜0.73；
1.35＜f/f3＜2.50；
-2.60＜f/f4＜-1.75; And
28.5＜V1-V2＜42.0。
The present invention puts mode by above-mentioned mirror assembly, can effectively control camera lens total length, reduce system sensitivity, and can reduce inessential light in the mirror group through repeatedly refraction, reflect and enter imaging region, make the better image quality of system's acquisition.
In optical photographic lens group of the present invention, the positive refracting power of this first lens tool provides system required part refracting power, helps to shorten the total length of this optical photographic lens group; This second lens tool is born refracting power, and the aberration that can be effectively this first lens of the positive refracting power of tool be produced is done revisal, and helps simultaneously the aberration of update the system; The 3rd positive refracting power of lens tool, refracting power that can be required with the mutual distribution system of this first lens avoids the refracting power of single lens excessive, helps to reduce the susceptibility of system; The 4th lens tool is born refracting power, can make the principal point (Principal Point) of optical system away from imaging surface, is conducive to shorten the optics total length of system, to promote the miniaturization of camera lens.
In optical photographic lens group of the present invention, the thing side surface of this first lens is convex surface, can strengthen the refracting power configuration of this first lens, is conducive to shorten the total length of this optical photographic lens group.These the second lens be concave surface as side surface, can effectively increase the back focal length of system, have enough back focal length can place other member to guarantee this optical photographic lens group.The thing side surface of the 3rd lens is concave surface and is convex surface as side surface, can help the astigmatism (Astigmatism) of update the system.The 4th lens be concave surface as side surface, can make the principal point of system further from imaging surface, more help lend some impetus to the miniaturization of camera lens, and the 4th lens as being provided with at least one point of inflexion (Inflection Point) on side surface, can effectively suppress from the light of axle visual field and be incident in angle on photo-sensitive cell, and the further aberration of modified off-axis visual field.
In optical photographic lens group of the present invention, this optical photographic lens group separately is provided with Yi Guanglan and is placed between object and this first lens, and further, more include at least another light hurdle between these second lens and the 3rd lens or between the 3rd lens and the 4th lens.The light hurdle is a kind of shading element that is arranged in camera lens, this shading element has endoporus, can be in order to limiting the incident ray scope, it comprises can be in order to determine that camera lens enters the aperture diaphragm of light quantity (Aperture Stop) or in order to revise the light hurdle of marginal ray or inessential light.
in optical photographic lens group of the present invention, when this light hurdle between object and this first lens is an aperture diaphragm, can make the outgoing pupil (Exit Pupil) of this optical photographic lens group away from imaging surface, therefore, light will be incident in the mode near vertical incidence on photo-sensitive cell, this is the heart far away (Telecentric) characteristic of picture side, heart characteristic far away is very important for the photoperceptivity of solid-state electronic photo-sensitive cell, to make the luminous sensitivity of sense electronics optical element improve, the minimizing system produces the possibility at dark angle, and be conducive to simultaneously reduce the total length of this optical photographic lens group, and in being provided with another light hurdle between these second lens and the 3rd lens or between the 3rd lens and the 4th lens, its function is the incident scope of restriction system light, can reduce inessential light and enter imaging region through repeatedly refraction, reflection in the mirror group, make system obtain better image quality.
Description of drawings
Figure 1A is the optical system schematic 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 schematic 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 schematic diagram of third embodiment of the invention.
Fig. 3 B is the aberration curve figure of third embodiment of the invention.
Fig. 4 is table one, is the optical data of first embodiment of the invention.
Fig. 5 is table two, is the aspherical surface data of first embodiment of the invention.
Fig. 6 is table three, is the optical data of second embodiment of the invention.
Fig. 7 is table four, is the aspherical surface data of second embodiment of the invention.
Fig. 8 is table five, is the optical data of third embodiment of the invention.
Fig. 9 is table six, is the aspherical surface data of third embodiment of the invention.
Figure 10 is table seven, is the numerical data of first embodiment of the invention to the three embodiment correlationship formulas.
Figure 11 describes the distance of LS, YS, DS, DL representative and the schematic diagram of relative position.
Drawing reference numeral:
First lens 110,210,310
Thing side surface 111,211,311
Picture side surface 112,212,312
The second lens 120,220,320
Thing side surface 121,221,321
Picture side surface 122,222,322
The 3rd lens 130,230,330
Thing side surface 131,231,331
Picture side surface 132,232,332
Aperture diaphragm 100,200,300
The first smooth hurdle 101,201
The second smooth hurdle 102,302
Infrared ray filtering optical filter 150,250,350
Imaging surface 160,260,360
The focal length of whole optical photographic lens group is f
The focal length of first lens is f1
The focal length of the 3rd lens is f3
The focal length of the 4th lens is f4
The abbe number of first lens is V1
The abbe number of the 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 the second lens is R3
The second lens be R4 as the side surface radius-of-curvature
Thing side surface to the distance on optical axis as side surface that is bordering on most as the tool refracting power lens of side that is bordering on most the tool refracting power lens of thing side in the optical photographic lens group is Td
Light hurdle between the second lens and the 4th lens to the distance of sense electronics optical element on optical axis is LS
Half of its diameter of bore of light hurdle between the second lens and the 4th lens is YS
Light hurdle between the second lens and the 4th lens, the thing side surface of its thing side direction adjacent lens to this light hurdle distance on optical axis is DS
Light hurdle between the second lens and the 4th lens, the thing side surface of its thing side direction adjacent lens to the distance on optical axis as side surface as the side direction adjacent lens is DL
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 line length is ImgH
Embodiment
the invention provides a kind of optical photographic lens group, by the thing side to sequentially comprising as side: the first lens of a positive refracting power of tool, its thing side surface is convex surface, the thing side surface of this first lens be aspheric surface as at least one surface in side surface, the second lens of the negative refracting power of one tool, it is concave surface as side surface, the 3rd lens of the one positive refracting power of tool, its thing side surface are concave surface and are convex surface as side surface, and the 4th lens of the negative refracting power of a tool, it is concave surface as side surface, the thing side surface of the 4th lens and be all aspheric surface as side surface, and the 4th lens as being provided with at least one point of inflexion on side surface, wherein, this optical photographic lens group separately is provided with a Guang Lan and a sense electronics optical element supplies the object imaging, this light hurdle is placed between object and this first lens, this sense electronics optical element is placed in the imaging surface place, and this optical photographic lens group more includes another light hurdle and is arranged between these second lens and the 4th lens, half of this sense electronics optical element effective pixel area diagonal line length is ImgH, this light hurdle between these second lens and the 4th lens, its to the distance of this sense electronics optical element on optical axis be LS, half of its diameter of bore is YS, the thing side surface of its thing side direction adjacent lens to this light hurdle distance on optical axis is DS, the thing side surface of its thing side direction adjacent lens to the distance on optical axis as side surface as the side direction adjacent lens is DL, the focal length of whole optical photographic lens group is f, the focal length of the 3rd lens is f3, the focal length of the 4th lens is f4, thing side surface to the distance on optical axis as side surface that is bordering on most as the tool refracting power lens of side that is bordering on most the tool refracting power lens of thing side in this optical photographic lens group is Td, the abbe number of this first lens is V1, the abbe number of these the second lens is V2, satisfy lower note relational expression:
(ImgH-0.7*LS)/ImgH＜YS/ImgH＜0.74；
0.10＜DS/DL＜0.73；
1.35＜f/f3＜2.50；
-2.60＜f/f4＜-1.75；
0.85＜Td/f＜0.92; And
20.0＜V1-V2＜42.0。
In the aforementioned optical photographic lens group of the present invention, when (ImgH-0.7*LS)/ImgH and YS/ImgH satisfy the above-mentioned relation formula, can effectively control the interior hole size on this light hurdle, be beneficial to suitably cover the inessential light in the mirror group, reduce inessential light and enter imaging region through repeatedly refraction, reflection in the mirror group, and then the Hoisting System image quality, and can avoid making because covering too much light the illumination (Illumination) of system too low; When DS/DL satisfies the above-mentioned relation formula, this light hurdle be can effectively control and relative position and distance between lens are adjacent, be beneficial to the assembled configuration between lens and this light hurdle; When f/f3 satisfied the above-mentioned relation formula, the configuration of the refracting power of the 3rd lens was comparatively suitable, helps the refracting power required with the mutual distribution system of this first lens, can avoid the refracting power of single lens excessive, and then effectively reduce the susceptibility of system; When f/f4 satisfies the above-mentioned relation formula, can make the principal point of system further from imaging surface, be conducive to shorten the optics total length of system, to promote the miniaturization of camera lens; When Td/f satisfies the above-mentioned relation formula, can make the configuration of lens in the mirror group comparatively tight, can make the more effective use of mirror group space acquisition, be conducive to reduce the total length of this optical photographic lens group; When V1-V2 satisfies the above-mentioned relation formula, be conducive to the correction of aberration in this optical photographic lens group.
In the aforementioned optical photographic lens group of the present invention, preferably, this light hurdle between object and this first lens is an aperture diaphragm, it can be conducive to the heart characteristic far away of system, can make the luminous sensitivity of sense electronics optical element improve, the minimizing system produces the possibility at dark angle, and the total length of this optical photographic lens group of favourable reduction simultaneously.
In the aforementioned optical photographic lens group of the present invention, the focal length of this first lens is f1, and the focal length of the 3rd lens is f3, preferably, satisfies lower relational expression: 1.10＜f1/f3＜1.85 of remembering; When f1/f3 satisfied the above-mentioned relation formula, the refracting power of this first lens and the 3rd lens configured comparatively balance, the generation that is conducive to reduce system sensitivity and reduces aberration.
In the aforementioned optical photographic lens group of the present invention, the abbe number of this first lens is V1, and the abbe number of these the second lens is V2, more preferably, satisfies lower relational expression: 28.5＜V1-V2＜42.0 of remembering; When V1-V2 satisfies the above-mentioned relation formula, more be conducive to the correction of aberration in this optical photographic lens group.
In the aforementioned optical photographic lens group of the present invention, these the second lens be that R4 and thing side surface radius-of-curvature are R3 as the side surface radius-of-curvature, preferably, satisfy lower note relational expression :-0.30＜R4/R3＜0.30; When R4/R3 satisfies the above-mentioned relation formula, help the aberration that this first lens produces is done revisal, and be unlikely to make the refracting power of these the second lens excessive, can avoid producing too much higher order aberratons.
In the aforementioned optical photographic lens group of the present invention, the thing side surface radius-of-curvature of this first lens is R1 and is R2 as the side surface radius-of-curvature, preferably, satisfies lower relational expression :-1.0＜R1/R2＜0 of remembering; When R1/R2 satisfies the above-mentioned relation formula, help the revisal of system's spherical aberration (Spherical Aberration).
In the aforementioned optical photographic lens group of the present invention, the thing side surface of this first lens to the distance of this sense electronics optical element on optical axis is TTL, half of this sense electronics optical element effective pixel area diagonal line length is ImgH, preferably, satisfies lower relational expression: TTL/ImgH＜2.0 of remembering; When TTL/ImgH satisfies the above-mentioned relation formula, be conducive to keep the miniaturization of this optical photographic lens group, on the electronic product that is equipped on frivolous miniaturization.
on the other hand, the invention provides a kind of optical photographic lens group, extremely sequentially comprised as side by the thing side: the first lens of a positive refracting power of tool, its thing side surface is convex surface, the second lens of the negative refracting power of one tool, it is concave surface as side surface, the 3rd lens of the one positive refracting power of tool, its thing side surface are concave surface and are convex surface as side surface, the thing side surface of the 3rd lens and be all aspheric surface as side surface, and the 4th lens of the negative refracting power of a tool, it is concave surface as side surface, the thing side surface of the 4th lens and be all aspheric surface as side surface, and the 4th lens as being provided with at least one point of inflexion on side surface, wherein, this optical photographic lens group separately is provided with a Guang Lan and a sense electronics optical element supplies the object imaging, this light hurdle is placed between object and this first lens, this sense electronics optical element is placed in the imaging surface place, and this optical photographic lens group more includes another light hurdle and is arranged between these second lens and the 3rd lens, half of this sense electronics optical element effective pixel area diagonal line length is ImgH, this light hurdle between these second lens and the 3rd lens, its to the distance of this sense electronics optical element on optical axis be LS, half of its diameter of bore is YS, the thing side surface of its thing side direction adjacent lens to this light hurdle distance on optical axis is DS, the thing side surface of its thing side direction adjacent lens to the distance on optical axis as side surface as the side direction adjacent lens is DL, the focal length of whole optical photographic lens group is f, the focal length of the 3rd lens is f3, the focal length of the 4th lens is f4, the abbe number of this first lens is V1, the abbe number of these the second lens is V2, satisfy lower note relational expression:
(ImgH-0.7*LS)/ImgH＜YS/ImgH＜0.74；
0.10＜DS/DL＜0.73；
1.35＜f/f3＜2.50；
-2.60＜f/f4＜-1.75; And
28.5＜V1-V2＜42.0。
In the aforementioned optical photographic lens group of the present invention, when (ImgH-0.7*LS)/ImgH and YS/ImgH satisfy the above-mentioned relation formula, can effectively control the interior hole size on this light hurdle, be beneficial to suitably cover the inessential light in the mirror group, reduce inessential light and enter imaging region through repeatedly refraction, reflection in the mirror group, and then the Hoisting System image quality, and can avoid making the illumination of system too low because covering too much light; When DS/DL satisfies the above-mentioned relation formula, this light hurdle be can effectively control and relative position and distance between lens are adjacent, be beneficial to the assembled configuration between lens and this light hurdle; When f/f3 satisfied the above-mentioned relation formula, the configuration of the refracting power of the 3rd lens was comparatively suitable, helps the refracting power required with the mutual distribution system of this first lens, can avoid the refracting power of single lens excessive, and then effectively reduce the susceptibility of system; When f/f4 satisfies the above-mentioned relation formula, can make the principal point of system further from imaging surface, be conducive to shorten the optics total length of system, to promote the miniaturization of camera lens; When V1-V2 satisfies the above-mentioned relation formula, be conducive to the correction of aberration in this optical photographic lens group.
In the aforementioned optical photographic lens group of the present invention, preferably, this light hurdle between object and first lens is an aperture diaphragm, it can be conducive to the heart characteristic far away of system, can make the luminous sensitivity of sense electronics optical element improve, the minimizing system produces the possibility at dark angle, and the total length of this optical photographic lens group of favourable reduction simultaneously.
In the aforementioned optical photographic lens group of the present invention, the focal length of this first lens is f1, and the focal length of the 3rd lens is f3, preferably, satisfies lower relational expression: 1.10＜f1/f3＜1.85 of remembering; When f1/f3 satisfied the above-mentioned relation formula, the refracting power of this first lens and the 3rd lens configured comparatively balance, the generation that is conducive to reduce system sensitivity and reduces aberration.
In optical photographic lens group of the present invention, the material of lens can be glass or plastic cement, if the material of lens is glass, can increase the degree of freedom of system's refracting power configuration, if the lens material is plastic cement, can effectively reduce production costs.In addition, aspheric surface can be set on lens surface, aspheric surface can easily be made into the shape beyond sphere, obtain more controlled variable, in order to subduing aberration, and then the number that uses of reduction lens, and can effectively reduce the total length of optical photographic lens group of the present invention.
In optical photographic lens group of the present invention, if lens surface is convex surface, represent that this lens surface is convex surface in paraxial place; If lens surface is concave surface, represent that this lens surface is concave surface in paraxial place.
In optical photographic lens group of the present invention, the light hurdle is a kind of shading element that is arranged in the mirror group, this shading element has endoporus (do not limit this endoporus and be circular or other shapes), can be in order to limit the incident ray scope, it comprises can be in order to determining that camera lens enters the aperture diaphragm of light quantity or in order to revising the light hurdle of marginal ray or inessential light, and the light field is set to the position of minimum diameter of bore in this light hurdle element.Light hurdle between these second lens and the 3rd lens or the 3rd lens and the 4th lens please refer to Figure 11, further describes distance and the relative position of LS, YS, DS, DL representative.LS is that this light hurdle 400 is to the distance of sense electronics optical element 430 on optical axis; YS is half of diameter of bore on this light hurdle 400, and namely 401 places are to the distance of optical axis; DS be the thing side surface 411 of adjacent lens 410 of thing side direction on this light hurdle 400 to this light hurdle 400 distances on optical axis; DL is that the thing side surface 411 of adjacent lens 410 of this light hurdle 400 thing side directions is to the distance of picture side surface 422 on optical axis of the adjacent lens 420 of this light hurdle 400 picture side directions.
Optical photographic lens group of the present invention will coordinate appended graphic detailed description the in detail by following specific embodiment.
" the first embodiment "
Optical photographic lens group the first embodiment of the present invention sees also Figure 1A, and the aberration curve of the first embodiment sees also Figure 1B.The optical photographic lens group of the first embodiment mainly is made of four pieces of lens, is extremely sequentially comprised as side by the thing side:
The first lens 110 of the one positive refracting power of tool, its thing side surface 111 and be all convex surface as side surface 112, its material is plastic cement, the thing side surface 111 of this first lens 110 and be all aspheric surface as side surface 112;
The second lens 120 of the negative refracting power of one tool, its thing side surface 121 be that convex surface and picture side surface 122 are concave surface, and its material is plastic cement, the thing side surface 121 of these the second lens 120 and be all aspheric surface as side surface 122;
The 3rd lens 130 of the one positive refracting power of tool, its thing side surface 131 are that concave surface and picture side surface 132 are convex surface, and its material is plastic cement, the thing side surface 131 of the 3rd lens 130 and be all aspheric surface as side surface 132; And
The 4th lens 140 of the negative refracting power of one tool, its thing side surface 141 is that convex surface and picture side surface 142 are concave surface, its material is plastic cement, the thing side surface 141 of the 4th lens 140 and be all aspheric surface as side surface 142, and the 4th lens 140 as being provided with at least one point of inflexion on side surface 142;
Wherein, this optical photographic lens group of the present invention separately is provided with an aperture diaphragm 100, and it is placed between object and this first lens 110;
One first smooth hurdle 101 is placed between these second lens 120 and the 3rd lens 130, and half of its diameter of bore (YS) is 0.85 millimeter; And
One second smooth hurdle 102 is placed between the 3rd lens 130 and the 4th lens 140, and half of its diameter of bore (YS) is 1.38 millimeters;
Separately include an infrared ray filtering optical filter (IR-filter) 150, be placed between the picture side surface 142 and an imaging surface 160 of the 4th lens 140; The material of this infrared ray filtering optical filter 150 is that glass and its do not affect the focal length of optical photographic lens group of the present invention, and this optical photographic lens group separately is provided with a sense electronics optical element in this imaging surface 160 places for object imaging thereon.
The equation of above-mentioned aspheric curve is expressed as follows:
Wherein:
X: be the point of Y apart from optical axis on 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 aspheric curve and the distance of optical axis;
K: conical surface coefficient;
Ai: i rank asphericity coefficient.
In the first embodiment optical photographic lens group, the focal length of whole optical photographic lens group is f, and its relational expression is: f=3.54 (millimeter).
In the first embodiment optical photographic lens group, the f-number of whole optical photographic lens group (f-number) is Fno, and its relational expression is: Fno=3.50.
In the first embodiment optical photographic lens group, in whole optical photographic lens group, half of maximum visual angle is HFOV, and its relational expression is: HFOV=32.6 (degree).
In the first embodiment optical photographic lens group, the abbe number of this first lens 110 is V1, and the abbe number of these the second lens 120 is V2, and its relational expression is: V1-V2=30.0.
In the first embodiment optical photographic lens group, the thing side surface radius-of-curvature of this first lens 110 is R1 and is R2 as the side surface radius-of-curvature, and its relational expression is: R1/R2=-0.58.
In the first embodiment optical photographic lens group, these the second lens 120 be that R4 and thing side surface radius-of-curvature are R3 as the side surface radius-of-curvature, its relational expression is: R4/R3=0.30.
In the first embodiment optical photographic lens group, the tool refracting power lens that are bordering on most the thing side in this optical photographic lens group namely this first lens 110 thing side surface 111 to be bordering on most as the tool refracting power lens of side namely the 4th lens 140 be Td as the distance of side surface 142 on optical axis, the focal length of whole optical photographic lens group is f, and its relational expression is: Td/f=0.87.
In the first embodiment optical photographic lens group, the focal length of whole optical photographic lens group is f, and the focal length of the 3rd lens 130 is f3, and its relational expression is: f/f3=2.23.
In the first embodiment optical photographic lens group, the focal length of whole optical photographic lens group is f, and the focal length of the 4th lens 140 is f4, and its relational expression is: f/f4=-2.07.
In the first embodiment optical photographic lens group, the focal length of this first lens 110 is f1, and the focal length of the 3rd lens 130 is f3, and its relational expression is: f1/f3=1.64.
In the first embodiment optical photographic lens group, half of this sense electronics optical element effective pixel area diagonal line length is ImgH, this first smooth hurdle 101 is LS to the distance of this sense electronics optical element on optical axis, and its relational expression is: (ImgH-0.7*LS)/ImgH=0.09.
In the first embodiment optical photographic lens group, half of this sense electronics optical element effective pixel area diagonal line length is ImgH, this second smooth hurdle 102 is LS to the distance of this sense electronics optical element on optical axis, and its relational expression is: (ImgH-0.7*LS)/ImgH=0.36.
In the first embodiment optical photographic lens group, half of these the first smooth hurdle 101 diameter of bores is YS, and half of this sense electronics optical element effective pixel area diagonal line length is ImgH, and its relational expression is: YS/ImgH=0.37.
In the first embodiment optical photographic lens group, half of these the second smooth hurdle 102 diameter of bores is YS, and half of this sense electronics optical element effective pixel area diagonal line length is ImgH, and its relational expression is: YS/ImgH=0.59.
In the first embodiment optical photographic lens group, these the first smooth hurdle 101 thing side direction adjacent lens i.e. thing side surface 121 to this first smooth hurdle 101 distance on optical axis of these the second lens 120 are DS, these the first smooth hurdle 101 thing side direction adjacent lens namely these the second lens 120 thing side surface 121 to as the side direction adjacent lens namely the 3rd lens 130 be DL as the distance of side surface 132 on optical axis, its relational expression is: DS/DL=0.39.
In the first embodiment optical photographic lens group, these the second smooth hurdle 102 thing side direction adjacent lens i.e. thing side surface 131 to this second smooth hurdle 102 distance on optical axis of the 3rd lens 130 are DS, these the second smooth hurdle 102 thing side direction adjacent lens namely the 3rd lens 130 thing side surface 131 to as the side direction adjacent lens namely the 4th lens 140 be DL as the distance of side surface 142 on optical axis, its relational expression is: DS/DL=0.42.
In the first embodiment optical photographic lens group, the thing side surface 111 of this first lens 110 to the distance of this sense electronics optical element on optical axis is TTL, half of this sense electronics optical element effective pixel area diagonal line length is ImgH, and its relational expression is: TTL/ImgH=1.91.
The detailed optical data of the first embodiment is as shown in Fig. 4 table one, and its aspherical surface data is as shown in Fig. 5 table two, and wherein the unit of radius-of-curvature, thickness and focal length is millimeter (mm), and HFOV is defined as half of maximum visual angle.
" the second embodiment "
Optical photographic lens group the second embodiment of the present invention sees also Fig. 2 A, and the aberration curve of the second embodiment sees also Fig. 2 B.The optical photographic lens group of the second embodiment mainly is made of four pieces of lens, is extremely sequentially comprised as side by the thing side:
The first lens 210 of the one positive refracting power of tool, its thing side surface 211 and be all convex surface as side surface 212, its material is plastic cement, the thing side surface 211 of this first lens 210 and be all aspheric surface as side surface 212;
The second lens 220 of the negative refracting power of one tool, its thing side surface 221 and be all concave surface as side surface 222, its material is plastic cement, the thing side surface 221 of these the second lens 220 and be all aspheric surface as side surface 222;
The 3rd lens 230 of the one positive refracting power of tool, its thing side surface 231 are that concave surface and picture side surface 232 are convex surface, and its material is plastic cement, the thing side surface 231 of the 3rd lens 230 and be all aspheric surface as side surface 232; And
The 4th lens 240 of the negative refracting power of one tool, its thing side surface 241 and be all concave surface as side surface 242, its material is plastic cement, the thing side surface 241 of the 4th lens 240 and be all aspheric surface as side surface 242, and the 4th lens 240 as being provided with at least one point of inflexion on side surface 242;
Wherein, this optical photographic lens group of the present invention separately is provided with an aperture diaphragm 200, and it is placed between object and this first lens 210; And
One first smooth hurdle 201 is placed between these second lens 220 and the 3rd lens 230, and half of its diameter of bore (YS) is 0.90 millimeter;
Separately include an infrared ray filtering optical filter 250, be placed between the picture side surface 242 and an imaging surface 260 of the 4th lens 240; The material of this infrared ray filtering optical filter 250 is that glass and its do not affect the focal length of optical photographic lens group of the present invention, and this optical photographic lens group separately is provided with a sense electronics optical element in this imaging surface 260 places for object imaging thereon.
The second equational expression of embodiment aspheric curve is as the form of the first embodiment.
In the second embodiment optical photographic lens group, the focal length of whole optical photographic lens group is f, and its relational expression is: f=3.70 (millimeter).
In the second embodiment optical photographic lens group, the f-number of whole optical photographic lens group is Fno, and its relational expression is: Fno=2.75.
In the second embodiment optical photographic lens group, in whole optical photographic lens group, half of maximum visual angle is HFOV, and its relational expression is: HFOV=31.9 (degree).
In the second embodiment optical photographic lens group, the abbe number of this first lens 210 is V1, and the abbe number of these the second lens 220 is V2, and its relational expression is: V1-V2=29.4.
In the second embodiment optical photographic lens group, the thing side surface radius-of-curvature of this first lens 210 is R1 and is R2 as the side surface radius-of-curvature, and its relational expression is: R1/R2=-0.23.
In the second embodiment optical photographic lens group, these the second lens 220 be that R4 and thing side surface radius-of-curvature are R3 as the side surface radius-of-curvature, its relational expression is: R4/R3=-0.03.
In the second embodiment optical photographic lens group, the tool refracting power lens that are bordering on most the thing side in this optical photographic lens group namely this first lens 210 thing side surface 211 to be bordering on most as the tool refracting power lens of side namely the 4th lens 240 be Td as the distance of side surface 242 on optical axis, the focal length of whole optical photographic lens group is f, and its relational expression is: Td/f=0.92.
In the second embodiment optical photographic lens group, the focal length of whole optical photographic lens group is f, and the focal length of the 3rd lens 230 is f3, and its relational expression is: f/f3=1.52.
In the second embodiment optical photographic lens group, the focal length of whole optical photographic lens group is f, and the focal length of the 4th lens 240 is f4, and its relational expression is: f/f4=-1.91.
In the second embodiment optical photographic lens group, the focal length of this first lens 210 is f1, and the focal length of the 3rd lens 230 is f3, and its relational expression is: f1/f3=1.10.
In the second embodiment optical photographic lens group, half of this sense electronics optical element effective pixel area diagonal line length is ImgH, this first smooth hurdle 201 is LS to the distance of this sense electronics optical element on optical axis, and its relational expression is: (ImgH-0.7*LS)/ImgH=0.15.
In the second embodiment optical photographic lens group, half of these the first smooth hurdle 201 diameter of bores is YS, and half of this sense electronics optical element effective pixel area diagonal line length is ImgH, and its relational expression is: YS/ImgH=0.39.
In the second embodiment optical photographic lens group, these the first smooth hurdle 201 thing side direction adjacent lens i.e. thing side surface 221 to this first smooth hurdle 201 distance on optical axis of these the second lens 220 are DS, these the first smooth hurdle 201 thing side direction adjacent lens namely these the second lens 220 thing side surface 221 to as the side direction adjacent lens namely the 3rd lens 230 be DL as the distance of side surface 232 on optical axis, its relational expression is: DS/DL=0.38.
In the second embodiment optical photographic lens group, the thing side surface 211 of this first lens 210 to the distance of this sense electronics optical element on optical axis is TTL, half of this sense electronics optical element effective pixel area diagonal line length is ImgH, and its relational expression is: TTL/ImgH=1.89.
The detailed optical data of the second embodiment is as shown in Fig. 6 table three, and its aspherical surface data is as shown in Fig. 7 table four, and wherein the unit of radius-of-curvature, thickness and focal length is millimeter (mm), and HFOV is defined as half of maximum visual angle.
" the 3rd embodiment "
Optical photographic lens group the 3rd embodiment of the present invention sees also Fig. 3 A, and the aberration curve of the 3rd embodiment sees also Fig. 3 B.The optical photographic lens group of the 3rd embodiment mainly is made of four pieces of lens, is extremely sequentially comprised as side by the thing side:
The first lens 310 of the one positive refracting power of tool, its thing side surface 311 and be all convex surface as side surface 312, its material is plastic cement, the thing side surface 311 of this first lens 310 and be all aspheric surface as side surface 312;
The second lens 320 of the negative refracting power of one tool, its thing side surface 321 be that convex surface and picture side surface 322 are concave surface, and its material is plastic cement, the thing side surface 321 of these the second lens 320 and be all aspheric surface as side surface 322;
The 3rd lens 330 of the one positive refracting power of tool, its thing side surface 331 are that concave surface and picture side surface 332 are convex surface, and its material is plastic cement, the thing side surface 331 of the 3rd lens 330 and be all aspheric surface as side surface 332; And
The 4th lens 340 of the negative refracting power of one tool, its thing side surface 341 is that convex surface and picture side surface 342 are concave surface, its material is plastic cement, the thing side surface 341 of the 4th lens 340 and be all aspheric surface as side surface 342, and the 4th lens 340 as being provided with at least one point of inflexion on side surface 342;
Wherein, this optical photographic lens group of the present invention separately is provided with an aperture diaphragm 300, and it is placed between object and this first lens 310; And
One second smooth hurdle 302 is placed between the 3rd lens 330 and the 4th lens 340, and half of its diameter of bore (YS) is 1.31 millimeters;
Separately include an infrared ray filtering optical filter 350, be placed between the picture side surface 342 and an imaging surface 360 of the 4th lens 340; The material of this infrared ray filtering optical filter 350 is that glass and its do not affect the focal length of optical photographic lens group of the present invention, and this optical photographic lens group separately is provided with a sense electronics optical element in this imaging surface 360 places for object imaging thereon.
The 3rd equational expression of embodiment aspheric curve is as the form of the first embodiment.
In the 3rd embodiment optical photographic lens group, the focal length of whole optical photographic lens group is f, and its relational expression is: f=3.43 (millimeter).
In the 3rd embodiment optical photographic lens group, the f-number of whole optical photographic lens group is Fno, and its relational expression is: Fno=3.00.
In the 3rd embodiment optical photographic lens group, in whole optical photographic lens group, half of maximum visual angle is HFOV, and its relational expression is: HFOV=33.5 (degree).
In the 3rd embodiment optical photographic lens group, the abbe number of this first lens 310 is V1, and the abbe number of these the second lens 320 is V2, and its relational expression is: V1-V2=30.0.
In the 3rd embodiment optical photographic lens group, the thing side surface radius-of-curvature of this first lens 310 is R1 and is R2 as the side surface radius-of-curvature, and its relational expression is: R1/R2=-0.84.
In the 3rd embodiment optical photographic lens group, these the second lens 320 be that R4 and thing side surface radius-of-curvature are R3 as the side surface radius-of-curvature, its relational expression is: R4/R3=0.10.
In the 3rd embodiment optical photographic lens group, the tool refracting power lens that are bordering on most the thing side in this optical photographic lens group namely this first lens 310 thing side surface 311 to be bordering on most as the tool refracting power lens of side namely the 4th lens 340 be Td as the distance of side surface 342 on optical axis, the focal length of whole optical photographic lens group is f, and its relational expression is: Td/f=0.90.
In the 3rd embodiment optical photographic lens group, the focal length of whole optical photographic lens group is f, and the focal length of the 3rd lens 330 is f3, and its relational expression is: f/f3=2.13.
In the 3rd embodiment optical photographic lens group, the focal length of whole optical photographic lens group is f, and the focal length of the 4th lens 340 is f4, and its relational expression is: f/f4=-2.05.
In the 3rd embodiment optical photographic lens group, the focal length of this first lens 310 is f1, and the focal length of the 3rd lens 330 is f3, and its relational expression is: f1/f3=1.39.
In the 3rd embodiment optical photographic lens group, half of this sense electronics optical element effective pixel area diagonal line length is ImgH, this second smooth hurdle 302 is LS to the distance of this sense electronics optical element on optical axis, and its relational expression is: (ImgH-0.7*LS)/ImgH=0.36.
In the 3rd embodiment optical photographic lens group, half of these the second smooth hurdle 302 diameter of bores is YS, and half of this sense electronics optical element effective pixel area diagonal line length is ImgH, and its relational expression is: YS/ImgH=0.56.
In the 3rd embodiment optical photographic lens group, these the second smooth hurdle 302 thing side direction adjacent lens i.e. thing side surface 331 to this light hurdle distance on optical axis of the 3rd lens 330 are DS, these the second smooth hurdle 302 thing side direction adjacent lens namely the 3rd lens 330 thing side surface 331 to as the side direction adjacent lens namely the 4th lens 340 be DL as the distance of side surface 342 on optical axis, its relational expression is: DS/DL=0.34.
In the 3rd embodiment optical photographic lens group, the thing side surface 311 of this first lens 310 to the distance of this sense electronics optical element on optical axis is TTL, half of this sense electronics optical element effective pixel area diagonal line length is ImgH, and its relational expression is: TTL/ImgH=1.85.
The detailed optical data of the 3rd embodiment is as shown in Fig. 8 table five, and its aspherical surface data is as shown in Fig. 9 table six, and wherein the unit of radius-of-curvature, thickness and focal length is millimeter (mm), and HFOV is defined as half of maximum visual angle.
Table one is depicted as the different numerical value change tables of optical photographic lens group 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; therefore above explanation is described and graphic only as exemplary, and is non-in order to limit claim of the present invention.Table seven (corresponding Figure 10) is the numerical data of the corresponding correlationship formula of the present invention of each embodiment.
Claims (10)
1. an optical photographic lens group, is characterized in that, extremely sequentially comprised as side by the thing side:
The first lens of the one positive refracting power of tool, its thing side surface is convex surface, the thing side surface of described first lens be aspheric surface as at least one surface in side surface;
The second lens of the negative refracting power of one tool, it is concave surface as side surface;
The 3rd lens of the one positive refracting power of tool, its thing side surface are concave surface and are convex surface as side surface; And
The 4th lens of the negative refracting power of one tool, it is concave surface as side surface, the thing side surface of described the 4th lens and be all aspheric surface as side surface, and described the 4th lens as being provided with at least one point of inflexion on side surface;
wherein, described optical photographic lens group separately is provided with a Guang Lan and a sense electronics optical element supplies the object imaging, described smooth hurdle is placed between object and described first lens, described sense electronics optical element is placed in the imaging surface place, and described optical photographic lens group more includes another light hurdle and is arranged between described the second lens and described the 4th lens, half of described sense electronics optical element effective pixel area diagonal line length is ImgH, described smooth hurdle between described the second lens and described the 4th lens, its to the distance of described sense electronics optical element on optical axis be LS, half of its diameter of bore is YS, the thing side surface of its thing side direction adjacent lens to the distance of described smooth hurdle on optical axis that is arranged between described the second lens and described the 4th lens is DS, the thing side surface of its thing side direction adjacent lens to the distance on optical axis as side surface as the side direction adjacent lens is DL, the focal length of whole optical photographic lens group is f, the focal length of described the 3rd lens is f3, the focal length of described the 4th lens is f4, thing side surface to the distance on optical axis as side surface that is bordering on most as the tool refracting power lens of side that is bordering on most the tool refracting power lens of thing side in described optical photographic lens group is Td, the abbe number of described first lens is V1, the abbe number of described the second lens is V2, satisfy lower note relational expression:
(ImgH-0.7*LS)/ImgH<YS/ImgH<0.74；
0.10<DS/DL<0.73；
1.35<f/f3<2.50；
-2.60<f/f4<-1.75；
0.85＜Td/f＜0.92; And
20.0<V1-V2<42.0。
2. optical photographic lens group as claimed in claim 1, is characterized in that, the described smooth hurdle between object and described first lens is an aperture diaphragm.
3. optical photographic lens group as claimed in claim 2, is characterized in that, the focal length of described first lens is f1, and the focal length of described the 3rd lens is f3, satisfies lower note relational expression:
1.10<f1/f3<1.85。
4. optical photographic lens group as claimed in claim 2, is characterized in that, the abbe number of described first lens is V1, and the abbe number of described the second lens is V2, satisfies lower note relational expression:
28.5<V1-V2<42.0。
5. optical photographic lens group as claimed in claim 3, is characterized in that, described the second lens be that R4 and thing side surface radius-of-curvature are R3 as the side surface radius-of-curvature, satisfy lower note relational expression:
-0.30<R4/R3<0.30。
6. optical photographic lens group as claimed in claim 3, is characterized in that, the thing side surface radius-of-curvature of described first lens is R1 and is R2 as the side surface radius-of-curvature, satisfies lower note relational expression:
-1.0<R1/R2<0。
7. optical photographic lens group 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 line length is ImgH, satisfies lower note relational expression:
TTL/ImgH<2.0。
8. an optical photographic lens group, is characterized in that, extremely sequentially comprised as side by the thing side:
The first lens of the one positive refracting power of tool, its thing side surface is convex surface;
The second lens of the negative refracting power of one tool, it is concave surface as side surface;
The 3rd lens of the one positive refracting power of tool, its thing side surface are concave surface and are convex surface as side surface, the thing side surface of described the 3rd lens and be all aspheric surface as side surface; And
The 4th lens of the negative refracting power of one tool, it is concave surface as side surface, the thing side surface of described the 4th lens and be all aspheric surface as side surface, and described the 4th lens as being provided with at least one point of inflexion on side surface;
wherein, described optical photographic lens group separately is provided with a Guang Lan and a sense electronics optical element supplies the object imaging, described smooth hurdle is placed between object and described first lens, described sense electronics optical element is placed in the imaging surface place, and described optical photographic lens group more includes another light hurdle and is arranged between described the second lens and described the 3rd lens, half of described sense electronics optical element effective pixel area diagonal line length is ImgH, described smooth hurdle between described the second lens and described the 3rd lens, its to the distance of described sense electronics optical element on optical axis be LS, half of its diameter of bore is YS, the thing side surface of its thing side direction adjacent lens to the distance of described smooth hurdle on optical axis that is arranged between described the second lens and described the 3rd lens is DS, the thing side surface of its thing side direction adjacent lens to the distance on optical axis as side surface as the side direction adjacent lens is DL, the focal length of whole optical photographic lens group is f, the focal length of described the 3rd lens is f3, the focal length of described the 4th lens is f4, the abbe number of described first lens is V1, the abbe number of described the second lens is V2, satisfy lower note relational expression:
(ImgH-0.7*LS)/ImgH<YS/ImgH<0.74；
0.10<DS/DL<0.73；
1.35<f/f3<2.50；
-2.60＜f/f4＜-1.75; And
28.5<V1-V2<42.0。
9. optical photographic lens group as claimed in claim 8, is characterized in that, the described smooth hurdle between object and described first lens is an aperture diaphragm.
10. optical photographic lens group as claimed in claim 9, is characterized in that, the focal length of described first lens is f1, and the focal length of described the 3rd lens is f3, satisfies lower note relational expression:
1.10<f1/f3<1.85。
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| CN102466853B (en) * | 2010-11-10 | 2014-06-04 | 大立光电股份有限公司 | Optical image acquiring lens group |
| CN102466852B (en) * | 2010-11-10 | 2014-06-04 | 大立光电股份有限公司 | Optical imaging lens group |
| CN105278083B (en) * | 2014-05-27 | 2019-06-11 | 新巨科技股份有限公司 | Wide-angle image lens set |
| CN107092077B (en) * | 2017-06-23 | 2022-09-16 | 浙江舜宇光学有限公司 | Optical imaging system |
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| JP3429599B2 (en) * | 1995-04-05 | 2003-07-22 | 富士写真光機株式会社 | Shooting lens device |
| CN101191898A (en) * | 2006-11-27 | 2008-06-04 | 株式会社理光 | Zoom lens, image pickup apparatus, and personal digital assistant |
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| JPH1123959A (en) * | 1997-07-08 | 1999-01-29 | Canon Inc | Photographing lens |
| JP4898200B2 (en) * | 2005-11-30 | 2012-03-14 | キヤノン株式会社 | Zoom lens and imaging apparatus having the same |
| JP5047605B2 (en) * | 2006-12-22 | 2012-10-10 | オリンパスイメージング株式会社 | Imaging optical system and imaging apparatus using the same |
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|---|---|---|---|---|
| JP3429599B2 (en) * | 1995-04-05 | 2003-07-22 | 富士写真光機株式会社 | Shooting lens device |
| CN101191898A (en) * | 2006-11-27 | 2008-06-04 | 株式会社理光 | Zoom lens, image pickup apparatus, and personal digital assistant |
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| JP特开2008-158198A 2008.07.10 |
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