CN103403601B - Imaging lens, imaging device, and portable terminal - Google Patents
Imaging lens, imaging device, and portable terminal Download PDFInfo
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- CN103403601B CN103403601B CN201280010030.XA CN201280010030A CN103403601B CN 103403601 B CN103403601 B CN 103403601B CN 201280010030 A CN201280010030 A CN 201280010030A CN 103403601 B CN103403601 B CN 103403601B
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
- G02B13/0015—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design
- G02B13/002—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface
- G02B13/0035—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface having three lenses
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/18—Optical objectives specially designed for the purposes specified below with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/021—Mountings, adjusting means, or light-tight connections, for optical elements for lenses for more than one lens
Abstract
Provided is an imaging lens that, by means of using a solid-state imaging element having a curved imaging surface, has an F value of less than F3.0, is able to suppress shading, has a high performance, and is compact. Further provided are a portable terminal and an imaging device using the imaging lens. The imaging lens is of an imaging device having: a solid-state imaging element provided with a photoelectric conversion section; and an imaging lens that forms an image of an imaging subject at the photoelectric conversion section of the solid-state imaging element. The imaging surface of the solid-state imaging element is curved. The imaging lens, in order from the object side, comprises a first lens having a positive refractive power, a second lens having a positive refractive power, and a third lens having a negative refractive power. The following conditional expressions are satisfied: -1.1<f12/f3<0 (1), 0.11<D5/f<0.7 (2), and -10.0<RI/Y<-2.0 (3), where f12 is the combined focal distance (mm) of the first lens and the second lens, f3 is the focal distance (mm) of the third lens, D5 is the on-axis thickness (mm) of the third lens, f is the focal distance (mm) of the entire imaging lens system, RI is the radius (mm) of curvature of the imaging surface of the solid-state imaging element, and Y is the maximum image height (mm).
Description
Technical field
The present invention relates to imaging lens system and camera head and portable terminal device, the invention particularly relates to the imaging lens system and camera head that are applicable to the solid-state image pickup that the solid-state image pickup such as CCD type imageing sensor or CMOS type imageing sensor and imaging surface bend and the portable terminal device employing this camera head.
Background technology
In recent years, little and thin camera head is equipped on mobile phone, PDA(PersonalDigital Assistant) etc. little and thin electronic equipment and portable terminal device, thus, distally can also transmitting image information mutually except acoustic information.
As the imaging apparatus used in these camera heads, CCD(Charge CoupledDevice can be used) type imageing sensor, CMOS(Complementary Metal-OxideSemiconductor) solid-state image pickup such as type imageing sensor.In recent years, the miniaturization development of the pel spacing of imaging apparatus, achieves high resolving power, high performance based on high pixelation.On the other hand, while maintaining high pixel, achieve the miniaturization of imaging apparatus.Further, also carried out making the trial that the imaging surface of imaging apparatus is bending.Seeking to be applicable to the small-sized of such imaging apparatus and there is high performance imaging lens system.
At this, as small-sized and there is high performance imaging lens system, be applicable to the imaging lens system that employing 3 pieces of lens are formed.The imaging lens system of 3 pieces of lens formations that imaging surface bends is disclosed in patent documentation 1 ~ 3.In addition, the imaging lens system that 1 piece of lens that the imaging surface that Patent Document 4 discloses a kind of solid-state image pickup has bent are formed.
Patent documentation 1: Japanese Unexamined Patent Publication 2006-47944 publication
Patent documentation 2: Japanese Unexamined Patent Publication 08-68935 publication
Patent documentation 3: Japanese Unexamined Patent Publication 2000-292688 publication
Patent documentation 4: Japanese Unexamined Patent Publication 2004-356175 publication
The film unit (film unit) that one is applicable to compact camera (compact camera), band lens is described in patent documentation 1, and imaging field angular width to 80 degree left and right, and there is the imaging lens system of the lightness of F3.5 to F4.For this lens arrangement, by the first positive lens, aperture diaphragm, the second positive lens and the 3rd negative lens, or the first negative lens, aperture diaphragm, the second positive lens and the 3rd negative lens are formed.
At this, the imaging lens system used in the solid-state image pickup that Pixel Dimensions is little, needs to have in order to corresponding from the pixel of high refinement and be required this characteristic that use lens are different with film camera (filmcamera) of high resolution.But the resolution of lens exists the limit because of F value, the bright lens little due to F value can obtain high resolving power, so cannot obtain enough performances with the F value of about F3.5 as described in Patent Document 1.
Next, describe a kind of film unit being applicable to compact camera, band lens in patent documentation 2 and patent documentation 3, and imaging field angle is about 77 degree, and there is the imaging lens system of the lightness of F5.7 to F6.2.This lens arrangement is that the rearmounted diaphragm three be made up of the first positive lens, the second negative lens, the 3rd positive lens and aperture diaphragm closes (triplet) type lens.
Because the lens of patent documentation 2 and patent documentation 3 have the F value darker than F5, so cannot obtain the resolution higher than the lens of patent documentation 1.Further, for three mould assemblys, because back focal length is easily elongated, imaging lens system and camera head is caused to maximize this problem so also have.
Further, disclosed in patent documentation 1 ~ 3 is the imaging lens system of film camera, by correspondingly making film face (imaging surface) bend with the curvature of the image that produces in lens, achieves the raising of performance.But owing to being all use the video camera imaging lens system of film, so textural at video camera, film face becomes the imaging surface of the so-called cylindrical lens only bent to picture long side direction.Therefore, although picture long side direction can obtain good performance, it is constant that the imaging surface due to picture short side direction maintains plane, improves, but also there is the situation causing deterioration because of the correction situation of curvature of the image so not only cannot realize performance.That is, can say that bending being difficult to by means of only the long side direction of imaging surface as patent documentation 1 ~ 3 obtains high-performance in picture entirety.
Further, owing to being the imaging lens system of film camera as above disclosed in patent documentation 1 ~ 3, thus for incide imaging surface light beam chief ray incidence angles for, not necessarily become enough little design at imaging surface periphery.For being formed in the imaging lens system of shot object image at the photoelectric conversion part of solid-state image pickup, if the so-called telecentric iris of the chief ray incidence angles inciding the light beam of imaging surface (Telecentric) properties deteriorate, the then relative solid-state image pickup oblique incidence of light beam, (shadow (shading) likely causes peripheral light amount not enough to the phenomenon reduced at the aperture efficiency that the generation of imaging surface periphery is actual.
On the other hand, Patent Document 4 discloses a kind of camera head for mobile phone etc., wherein by making solid-state image pickup bend to polynomial expression face shape, revising the curvature of the image, the distortion aberration that produce in lens evenly, thus obtaining small-sized and that resolution is high camera head.But, because solid-state image pickup is CIF size (352 pixel × 288 pixel), and imaging lens system is 1 piece of formation, so chromatic aberration is not fully revised, therefore when also using the solid-state image pickup of high pixel, the image of the high image quality that cannot be matched with it.
Summary of the invention
The present invention proposes in view of this problem, its object is to, by utilizing the scheme bent as the face that is projected of imaging surface etc., obtain small-sized and there is high-performance, shadow can be suppressed, imaging lens system that F value is less than F3.0 and employ camera head and the portable terminal device of this imaging lens system.
Imaging lens system described in technical scheme 1 is the imaging lens system for forming shot object image in the face that is projected being arranged at camera head,
The above-mentioned face that is projected is bending towards the arbitrary section of picture periphery,
Above-mentioned imaging lens system from object side by the order of the first lens, the second lens and the 3rd lens by there are the first lens of positive focal power, second lens with positive focal power and the 3rd lens with negative focal power are formed,
And meet following conditional.
－1.1＜f12／f3＜0 （1）
0.11＜D5／f＜0.7 （2）
－10.0＜RI／Y＜－2.0 （3）
Wherein,
F12: the synthesis focal length (mm) of above-mentioned first lens and above-mentioned second lens
F3: the focal length (mm) of above-mentioned 3rd lens
D5: the axial width (mm) of above-mentioned 3rd lens
F: the focal length (mm) of above-mentioned imaging lens system whole system
RI: the radius-of-curvature (mm) of the imaging surface of above-mentioned solid-state image pickup
Y: maximum image height (mm)
In imaging lens system of the present invention, the face that is projected only has long side direction to bend unlike film camera in the past, but by premised on the flexure plane all bent towards the arbitrary section of picture periphery.Due to above-mentioned be projected look like this bend, so miniaturization and the high performance of above-mentioned camera head can be taken into account.More specifically, be projected if make towards imaging lens system lateral bend, be then conducive to the correction of the so-called telecentric iris characteristic of chief ray incidence angles of the light beam inciding the face of being projected.Compared with the situation being plane with the face of being projected, to during imaging lens system lateral bend because the chief ray incidence angles of the light beam inciding the face of being projected diminishes, even if so fully do not carry out the correction of telecentric iris characteristic in above-mentioned imaging lens system, aperture efficiency also can not reduce, the generation of shadow can be suppressed.In addition, the correction of distortion aberration, commatic aberration becomes easier, can also realize the miniaturization of above-mentioned camera head.Further, also can make to be projected face and bend to dome shape.If bend to dome shape, then due to the long side direction of picture and short side direction bending all equally, can conform to the curvature of the image of imaging lens system, therefore can improve performance in picture entirety.Further, due to the correction of pure curvature of the image can need not be carried out in imaging lens system, thus do not need reduce Petzval and, can the focal power of each be set more weak, therefore can also suppress the generation of chromatic aberration, commatic aberration.
Above-mentioned imaging lens system from object side the first lens, the second lens and the 3rd lens in order by there are the first lens of positive focal power, second lens with positive focal power and the 3rd lens with negative focal power are formed.The just group be made up of the first lens and the second lens and this lens arrangement of the so-called long distance photo formula (telephoto type) of negative group configuration be made up of the 3rd lens are conducive to the miniaturization of imaging lens system total length.In addition, owing to utilizing above-mentioned first lens and above-mentioned second lens to share positive focal power, so the generation of spherical aberration, commatic aberration can be suppressed.Further, the factor of core shift error reduces, and can realize the lens that throughput rate is good.
Conditional (1) is the negative focal length of focal length for setting the positive lens groups be made up of the first lens and the second lens rightly and the 3rd lens, carries out the conditional of miniaturization and aberration correction evenly.Be less than the upper limit by the value of conditional (1), the correction of the miniaturization of lens total length and curvature of the image, the outer each aberration of axle can be carried out well.On the other hand, be greater than lower limit by the value of conditional (1), can make the focal length of the 3rd lens can not be too small, the correction distorting aberration, commatic aberration can be carried out well.In addition, the scope of following formula is more preferably.
－1.0＜f12／f3＜－0.1 （1’）
Be preferably the scope of following formula further.
－0.95＜f12／f3＜－0.1 （1”）
Conditional (2) is the conditional of the thickness for setting the 3rd lens rightly.Be greater than lower limit by the value of conditional (2), can make the 3rd lens can not be excessively thin, can suppress the raising of difficulty of processing.On the other hand, be less than the upper limit by the value of conditional (2), can make the 3rd lens can not be blocked up, can suppress the generation of multiplying power chromatic aberration, the shortening of lens total length becomes easy, can realize the miniaturization of imaging lens system and camera head.In addition, the scope of following formula is more preferably.
0.12＜D5／f＜0.6 （2’）
Be preferably the scope of following formula further.
0.13＜D5／f＜0.5 （2”）
Conditional (3) is the bending conditional for setting the face that is projected rightly.If the value of conditional (3) is less than the upper limit, is then projected the bending of face and can becomes large, can prevent the correction burden of the telecentric iris characteristic in imaging lens system, curvature of the image from increasing, therefore Petzval and can not be too small, can revise commatic aberration, chromatic aberration well.On the other hand, if the value of conditional (3) is greater than lower limit, then the bending meeting being projected face diminishes, and can prevent the overcorrect of curvature of the image.In addition, the final face of imaging lens system can being prevented and be projected face too close, fully guaranteeing the airspace for inserting IR cut-off filter etc.In addition, the scope of following formula is more preferably.
－9.0＜RI／Y＜－2.0 （3’）
Imaging lens system described in technical scheme 2 proposes based on the invention described in technical scheme 1, it is characterized in that, above-mentioned first lens have the shape convex surface facing object side, meet following conditional.
0.7＜f1／f＜1.7 （4）
Wherein,
F1: the focal length (mm) of above-mentioned first lens
If make above-mentioned first lens in the shape convex surface facing object side, be then conducive to the miniaturization of above-mentioned imaging lens system.First surface due to above-mentioned imaging lens system has positive focal power, so principle point location can be made to be close to object side configuration, can maintain long distance photo formula, therefore be easy to miniaturization.
Conditional (4) is the conditional of the focal length of above-mentioned first lens of appropriate setting.By making the value of conditional (4) be less than the upper limit, can make the focal length of above-mentioned first lens can not be excessive, the principle point location of imaging lens system whole system can be avoided too close to image side, therefore, it is possible to suppress less by the lens total length of imaging lens system whole system.On the other hand, by making the value of conditional (4) be greater than lower limit, can make the focal length of above-mentioned first lens can not be too small, commatic aberration can be revised well, distort aberration.In addition, the scope of following formula is more preferably.
0.8＜f1／f＜1.6 （4’）
Imaging lens system described in technical scheme 3 proposes based on the invention described in technical scheme 1 or 2, it is characterized in that, above-mentioned second lens have the shape convex surface facing image side, meet following conditional.
－5＜R4／（（n2－1）*f）＜－0.4 （5）
Wherein
R4: the radius-of-curvature (mm) in the face, image side of above-mentioned second lens
N2: the refractive index relative to d line of above-mentioned second lens
If make above-mentioned second lens in shape convex surface facing image side, then because the image side mask of above-mentioned second lens has positive focal power, thus to the peripheral light beam of above-mentioned 3rd lens entrance based on converging action by the position close to optical axis.Therefore, it is possible to the off-axis aberration produced in lens perimeter is suppressed very little.
Conditional (5) is the conditional of the positive focal power in face, image side for setting above-mentioned second lens rightly.Be less than the upper limit by the value of conditional (5), the positive focal power in above-mentioned second face, lens image side can be made to become and be greater than more than required degree, the intelligent shape hot spot of axle outer light beam can be suppressed, distort the generation of aberration, thus obtain good performance.On the other hand, be greater than lower limit by the value of conditional (5), due to appropriateness the positive focal power in above-mentioned second face, lens image side can be maintained, so Petzval and excessive can be suppressed, correspondingly can revise curvature of the image well with the effect of bending image planes.In addition, the scope of following formula is more preferably.
－4＜R4／（（n2－1）*f）＜－0.5 （5’）
Imaging lens system described in technical scheme 4 proposes based on the invention in technical scheme 1 ~ 3 described in any one, it is characterized in that, between above-mentioned first lens and above-mentioned second lens, be configured with aperture diaphragm.
If aperture diaphragm is configured between above-mentioned first lens and above-mentioned second lens, then because the first positive lens and the second positive lens become the formation across above-mentioned aperture diaphragm symmetry, so become the formation being easy to revise multiplying power chromatic aberration, distorting aberration.
Imaging lens system described in technical scheme 5 proposes based on the invention in technical scheme 1 ~ 3 described in any one, it is characterized in that, be close to object side place in the object lateral location of the periphery of above-mentioned first lens of the effective diameter internal ratio of above-mentioned first lens and be configured with aperture diaphragm.
If become the preposition diaphragm of what is called of object side aperture diaphragm being configured in above-mentioned first lens, then leave the formation of image planes owing to becoming exit pupil position, so be conducive to the correction of telecentric iris characteristic.Bend by making the face that is projected as the present invention, without the need to carrying out in the imaging lens system of pure correction telecentric iris characteristic, form, then almost without the need to the correction of telecentric iris characteristic if become preposition diaphragm, correspondingly can fully revise other aberrations, therefore can realize high performance.Further, even if when the mechanical shutter of needs, also can be configured to be configured in the formation near object side, therefore better.
Imaging lens system described in technical scheme 6 proposes based on the invention in technical scheme 1 ~ 5 described in any one, it is characterized in that, also has the lens in fact without focal power.That is, the formation of technical scheme 1 is imparted to the situation of the illusory lens in fact not having focal power also in range of application of the present invention.
The feature of the camera head described in technical scheme 7 is to have: the solid-state image pickup possessing photoelectric conversion part; Keep above-mentioned solid-state image pickup, and be formed with the substrate in the terminal for connecting portion of the transmitting-receiving for carrying out electric signal; Imaging lens system in technical scheme 1 ~ 6 described in any one; With this imaging lens system built-in, and have from the incident peristome of the light of object side and the housing formed by light-proofness material.
The imaging lens system of the application of the invention, can obtain more small-sized and more high performance camera head.
The feature of the portable terminal device described in technical scheme 8 is, possesses the camera head that technical scheme 7 is recorded.
The camera head of the application of the invention, can obtain more small-sized and more high performance portable terminal device.
According to the present invention, bend by making to be projected face, can obtain small-sized and there is high-performance, shadow can be suppressed, imaging lens system that F value is less than F3.0 and employ camera head and the portable terminal device of this imaging lens system.
Accompanying drawing explanation
Fig. 1 is the stereographic map of camera head of the present embodiment.
Fig. 2 is the compound figure illustrating the section of the optical axis along imaging lens system of camera head of the present embodiment.
Fig. 3 is an example of the portable terminal device possessing camera head of the present embodiment and the outside drawing of mobile phone.
Fig. 4 is the cut-open view of the imaging lens system of embodiment 1.
Fig. 5 is the aberration figure (spherical aberration (a), astigmatism (b), distortion aberration (c)) of the imaging lens system of embodiment 1.
Fig. 6 is the cut-open view of the imaging lens system of embodiment 2.
Fig. 7 is the aberration figure (spherical aberration (a), astigmatism (b), distortion aberration (c)) of the imaging lens system of embodiment 2.
Fig. 8 is the cut-open view of the imaging lens system of embodiment 3.
Fig. 9 is the aberration figure (spherical aberration (a), astigmatism (b), distortion aberration (c)) of the imaging lens system of embodiment 3.
Figure 10 is the cut-open view of the imaging lens system of embodiment 4.
Figure 11 is the aberration figure (spherical aberration (a), astigmatism (b), distortion aberration (c)) of the imaging lens system of embodiment 4.
Figure 12 is the cut-open view of the imaging lens system of embodiment 5.
Figure 13 is the aberration figure (spherical aberration (a), astigmatism (b), distortion aberration (c)) of the imaging lens system of embodiment 5.
Figure 14 is the cut-open view of the imaging lens system of embodiment 6.
Figure 15 is the aberration figure (spherical aberration (a), astigmatism (b), distortion aberration (c)) of the imaging lens system of embodiment 6.
Figure 16 is the cut-open view of the imaging lens system of embodiment 7.
Figure 17 is the aberration figure (spherical aberration (a), astigmatism (b), distortion aberration (c)) of the imaging lens system of embodiment 7.
Figure 18 is the cut-open view of the imaging lens system of embodiment 8.
Figure 19 is the aberration figure (spherical aberration (a), astigmatism (b), distortion aberration (c)) of the imaging lens system of embodiment 8.
Figure 20 is the cut-open view of the imaging lens system of embodiment 9.
Figure 21 is the aberration figure (spherical aberration (a), astigmatism (b), distortion aberration (c)) of the imaging lens system of embodiment 9.
Figure 22 is the cut-open view of the imaging lens system of embodiment 10.
Figure 23 is the aberration figure (spherical aberration (a), astigmatism (b), distortion aberration (c)) of the imaging lens system of embodiment 10.
Embodiment
Below, based on accompanying drawing, embodiments of the present invention are described.Fig. 1 is the vertical view of camera head 50 of the present embodiment, and Fig. 2 is the cut-open view that the formation of Fig. 1 is cut off by the cross section that comprises optical axis.
As shown in Fig. 1 or Fig. 2, camera head 50 possesses: as the CMOS type imaging apparatus 51 of solid-state image pickup, it has photoelectric conversion part 51a; Imaging lens system 10, shot object image is photographed the photoelectric conversion part 51a on this imaging apparatus 51 by it; With housing 53, have from the incident peristome of the light of object side and be made up of light-blocking member, said elements forms as one.
As shown in Figure 2, imaging apparatus 51 bends to spherical with the radius-of-curvature of regulation, pixel (photo-electric conversion element) is configured with two-dimensionally at the central portion in the face (being projected face) of its bending sensitive side, thus the photoelectric conversion part 51a formed as light accepting part, around it, be formed with signal processing circuit 51b.This signal processing circuit 51b by drive successively each pixel to obtain signal charge driving circuit portion, each signal charge is converted to digital signal A/D converter section and use this digital signal to formed picture signal export signal processing part etc. formed.In addition, imaging apparatus is not limited to above-mentioned CMOS type imageing sensor, also can adopt other the imaging apparatus such as CCD.
In the photoelectric conversion part 51a side of imaging apparatus 51, be fixed with seal glass C by spacer B, and the side surface part of seal glass C or imaging apparatus 51 is fixed in housing 53.Seal glass C is in this case dull and stereotyped, but also correspondingly can bend with photoelectric conversion part 51a.
At the another side (with the face of photoelectric conversion part 51a opposition side) of imaging apparatus 51, be formed with the multiple outer electrodes 52 for being connected with external circuit.Outer electrode 52 is connected with not shown external circuit (control circuit that the epigyny device such as having installed camera head has), accept for driving the voltage of imaging apparatus 51, the supply of clock signal from external circuit, and, can by the externally circuit output of digital YUV signal.
In addition, although not diagram, but imaging apparatus 51 with the face placement substrate of photoelectric conversion part 51a opposition side, by wire bond mode, this substrate is connected with imaging apparatus 51, also can be used for being formed with the face of imaging apparatus opposition side of this substrate multiple outer electrodes of being connected with external circuit.
As shown in Figure 2, the housing 53 be made up of light-blocking member, in the photoelectric conversion part 51a side of imaging apparatus 51, is screwed together in the picture frame 55 keeping imaging lens system 10, can adjusts imaging lens system 10 thus along optical axis direction.
Imaging lens system 10 is made up of positive the first lens L1, aperture diaphragm S, the second positive lens L2 and the 3rd negative lens L3 in order from object side, is configured to form shot object image at the photoelectric conversion surface 51a of imaging apparatus 51.Wherein, the single dotted broken line in Fig. 2 is the optical axis of each lens L1 ~ L3.
Infrared cut of light coating has been carried out to the face of any one in the first lens L1, the second lens L2, the 3rd lens L3, seal glass C.In addition, although do not illustrate, also can replace IR-cut coating and configure infrared cut of light light filter than seal glass position on the front.
The each lens L1 ~ L3 forming imaging lens system 10 is kept by the picture frame 55 be made up of light-blocking member.For each lens L1 ~ L3, along with from object side towards image side enlarged outside diameter, between the flange part of lens L1, L2, be configured with the discoid light-blocking member SH1 defining aperture diaphragm S in central authorities.In addition, according to the mode abutted with the image side flange part of lens L2, light-blocking member SH2 is fixed in picture frame 55.The surface of nothing being used up to light-blocking member SH1, SH2 of ending can be stepped or uneven surface.In addition, also light-blocking member can be configured between the 3rd lens L3 and seal glass C.By at the outside of opticpath configuration light-blocking member, the generation of afterimage, hot spot can be suppressed.Wherein, when the camera head shown in Fig. 2, diagram H is the height of the imaging lens system optical axis direction of camera head.
Fig. 3 is an example of the portable terminal device possessing camera head 50 of the present embodiment and the outside drawing of mobile phone 100.For the mobile phone 100 shown in this figure, possess the upper shell 71 as housing of display frame D1 and D2 and possess the lower house 72 of the action button 60 as input part, linking via hinge 73.Camera head 50 is built in the below of the display frame D2 in upper shell 71, and camera head 50 is configured to obtain light from the outside surface side of upper shell 71.In addition, the position of this camera head also can be configured in top or the side of the display frame D2 in upper shell 71.In addition, mobile phone is not limited to collapsible certainly.
(embodiment)
Next, the embodiment being applicable to above-mentioned embodiment is described.But, the present invention can't help embodiment shown below and limit.The symbol used in each embodiment is as described below.
F: the focal length of imaging lens system whole system
FB: back focal length
F:F value
Y: the maximum image height in imaging surface (being projected face) diagonal angle of solid-state image pickup
R: radius-of-curvature
D: interval above axle
Nd: lens material is relative to the refractive index of d line
ν d: the Abbe number of lens material
ENTP: entrance pupil position (from first surface to the distance of entrance pupil position)
EXTP: exit pupil position (distance from imaging surface to exit pupil position)
H1: front side principle point location (from first surface to the distance of front side principle point location)
H2: rear side principle point location (from final face to the distance of rear side principle point location)
In embodiments, the face recording " * " after each numbering is the face with aspherical shape, and aspheric shape for initial point, gets X-axis along optical axis direction with the summit in face, and the height with optical axis vertical direction is set to h, utilizes following " several 1 " to represent.
[several 1]
Wherein,
The asphericity coefficient of Ai:i time
R: radius-of-curvature
K: circular cone constant
(embodiment 1)
Lens data is shown in table 1.It should be noted that, after this (comprise the lens data of table) and use E(such as 2.5E-02) represent 10 power multiplier (such as 2.5 × 10
-02).Fig. 4 is the cut-open view of the lens of embodiment 1.In figure, L1 represents the first lens, and L2 represents the second lens, and L3 represents the 3rd lens, and S represents aperture diaphragm, and F represents seal glass or infrared cut off filter, and I represents imaging surface.Fig. 5 (a) is the spherical aberration figure of embodiment 1, Fig. 5 (b), and to be astigmatism figure, Fig. 5 (c) be distorts aberration figure.At this, in spherical aberration figure and commatic aberration figure, g represents g line, and d represents the spherical image residual quantity relative to d line.In addition, in astigmatism figure, solid line S represents vertical section (Sagittal Surface) face, and dotted line M represents paratropic plane (following identical).Aperture diaphragm S is between the first lens L1 and the second lens L2.
［ table 1 ］
Embodiment 1
(embodiment 2)
Lens data is shown in table 2.Fig. 6 is the cut-open view of the lens of embodiment 2.In figure, L1 represents the first lens, and L2 represents the second lens, and L3 represents the 3rd lens, and S represents aperture diaphragm, and F represents seal glass or infrared cut off filter, and I represents imaging surface.Fig. 7 (a) is the spherical aberration figure of embodiment 2, Fig. 7 (b), and to be astigmatism figure, Fig. 7 (c) be distorts aberration figure.Aperture diaphragm S is between the first lens L1 and the second lens L2.
［ table 2 ］
Embodiment 2
(embodiment 3)
Lens data is shown in table 3.Fig. 8 is the cut-open view of the lens of embodiment 3.In figure, L1 represents the first lens, and L2 represents the second lens, and L3 represents the 3rd lens, and S represents aperture diaphragm, and F represents seal glass or infrared cut off filter, and I represents imaging surface.Fig. 9 (a) is the spherical aberration figure of embodiment 3, Fig. 9 (b), and to be astigmatism figure, Fig. 9 (c) be distorts aberration figure.Aperture diaphragm S is between the first lens L1 and the second lens L2.
［ table 3 ］
Embodiment 3
(embodiment 4)
Lens data is shown in table 4.Figure 10 is the cut-open view of the lens of embodiment 4.In figure, L1 represents the first lens, and L2 represents the second lens, and L3 represents the 3rd lens, and S represents aperture diaphragm, and F represents seal glass or infrared cut off filter, and I represents imaging surface.Figure 11 (a) is the spherical aberration figure of embodiment 4, Figure 11 (b), and to be astigmatism figure, Figure 11 (c) be distorts aberration figure.Aperture diaphragm S is close to object side place in the object lateral location of the effective diameter internal ratio first lens L1 periphery of the first lens L1.
［ table 4 ］
Embodiment 4
(embodiment 5)
Lens data is shown in table 5.Figure 12 is the cut-open view of the lens of embodiment 5.In figure, L1 represents the first lens, and L2 represents the second lens, and L3 represents the 3rd lens, and S represents aperture diaphragm, and F represents seal glass or infrared cut off filter, and I represents imaging surface.Figure 13 (a) is the spherical aberration figure of embodiment 5, Figure 13 (b), and to be astigmatism figure, Figure 13 (c) be distorts aberration figure.Aperture diaphragm S is close to object side place in the object lateral location of the effective diameter internal ratio first lens L1 periphery of the first lens L1.
［ table 5 ］
Embodiment 5
(embodiment 6)
Lens data is shown in table 6.Figure 14 is the cut-open view of the lens of embodiment 6.In figure, L1 represents the first lens, and L2 represents the second lens, and L3 represents the 3rd lens, and S represents aperture diaphragm, and F represents seal glass or infrared cut off filter, and I represents imaging surface.Figure 15 (a) is the spherical aberration figure of embodiment 6, Figure 15 (b), and to be astigmatism figure, Figure 15 (c) be distorts aberration figure.Aperture diaphragm S is between the first lens L1 and the second lens L2.
［ table 6 ］
Embodiment 6
(embodiment 7)
Lens data is shown in table 7.Figure 16 is the cut-open view of the lens of embodiment 7.In figure, L1 represents the first lens, and L2 represents the second lens, and L3 represents the 3rd lens, and S represents aperture diaphragm, and F represents seal glass or infrared cut off filter, and I represents imaging surface.Figure 17 (a) is the spherical aberration figure of embodiment 7, Figure 17 (b), and to be astigmatism figure, Figure 17 (c) be distorts aberration figure.Aperture diaphragm S is between the first lens L1 and the second lens L2.
［ table 7 ］
Embodiment 7
(embodiment 8)
Lens data is shown in table 8.Figure 18 is the cut-open view of the lens of embodiment 8.In figure, L1 represents the first lens, and L2 represents the second lens, and L3 represents the 3rd lens, and S represents aperture diaphragm, and F represents seal glass or infrared cut off filter, and I represents imaging surface.Figure 19 (a) is the spherical aberration figure of embodiment 8, Figure 19 (b), and to be astigmatism figure, Figure 19 (c) be distorts aberration figure.Aperture diaphragm S is between the first lens L1 and the second lens L2.
［ table 8 ］
Embodiment 8
(embodiment 9)
Lens data is shown in table 9.Figure 20 is the cut-open view of the lens of embodiment 9.In figure, L1 represents the first lens, and L2 represents the second lens, and L3 represents the 3rd lens, and S represents aperture diaphragm, and F represents seal glass or infrared cut off filter, and I represents imaging surface.Figure 21 (a) is the spherical aberration figure of embodiment 9, Figure 21 (b), and to be astigmatism figure, Figure 21 (c) be distorts aberration figure.Aperture diaphragm S is between the first lens L1 and the second lens L2.
［ table 9 ］
Embodiment 9
(embodiment 10)
Lens data is shown in table 10.Figure 22 is the cut-open view of the lens of embodiment 10.In figure, L1 represents the first lens, and L2 represents the second lens, and L3 represents the 3rd lens, and S represents aperture diaphragm, and F represents seal glass or infrared cut off filter, and I represents imaging surface.Figure 23 (a) is the spherical aberration figure of embodiment 10, Figure 23 (b), and to be astigmatism figure, Figure 23 (c) be distorts aberration figure.Aperture diaphragm S is between the first lens L1 and the second lens L2.
［ table 10 ］
Embodiment 10
The primary system one of the conditional described in technical scheme is shown in table 11.
[table 11]
| Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | Embodiment 5 | ||
| (1) | f12/f3 | -0.563 | -0.541 | -0.509 | -0.904 | -0.616 |
| (2) | D5/f | 0.331 | 0.413 | 0.221 | 0.205 | 0.243 |
| (3) | RI/Y | -5.26 | -2.81 | -5.44 | -7.89 | -5.16 |
| (4) | f1/f | 1.079 | 1.525 | 1.024 | 1.080 | 1.414 |
| (5) | R4/((n2-1)*f) | -2.092 | -1.654 | -0.848 | -1.079 | -2.900 |
| Embodiment 6 | Embodiment 7 | Embodiment 8 | Embodiment 9 | Embodiment 10 | ||
| (1) | f12/f3 | -0.659 | -0.507 | -0.475 | -0.163 | -0.113 |
| (2) | D5/f | 0.359 | 0.343 | 0.165 | 0.173 | 0.138 |
| (3) | RI/Y | -7.84 | -4.97 | -6.49 | -2.92 | -3.35 |
| (4) | f1/f | 0.854 | 1.013 | 0.822 | 1.390 | 1.350 |
| (5) | R4/((n2-1)*f | -1.593 | -3.200 | -0.640 | -1.559 | -1.570 |
Wherein, for the implication of the paraxial radius-of-curvature described in claim and embodiment, when the lens determining of reality, approximate curvature radius when can carry out matching by utilizing minimum multiplication to the measuring shape value of (specifically relative to the middle section of lens external diameter within 10%) near lens center is as paraxial radius-of-curvature.In addition, such as when employing the asphericity coefficient of 2 times, the radius-of-curvature that the benchmark radius-of-curvature of aspheric surface definition further contemplates 2 asphericity coefficients (such as a reference, can be please refer to P41 ~ 42 of Song Juji work " Lens Design method " (altogether vertical publication Co., Ltd.) as paraxial radius-of-curvature.
The present invention is not limited to the embodiment described in instructions, and those skilled in the art are from the embodiment described in this instructions, known embodiment, the variation also comprising other of thought.Such as, the situation of the illusory lens in fact without focal power is also accompanied with also in range of application of the present invention.
Description of reference numerals: 10-imaging lens system; 50-camera head; 51a-photoelectric conversion part; 51b-signal processing circuit; 52-outer electrode; 53-housing; 55-picture frame; 60-action button; 71-upper shell; 72-lower house; 73-hinge; 100-mobile phone; B-spacer; C-seal glass; D1, D2-display frame; L1-first lens; L2-second lens; L3-the 3rd lens; S-aperture diaphragm; SH1-light-blocking member; SH2-light-blocking member.
Claims (11)
1. an imaging lens system, is the imaging lens system for forming shot object image in the face that is projected being arranged at camera head, it is characterized in that,
The above-mentioned face that is projected is bending towards the arbitrary section of picture periphery,
Above-mentioned imaging lens system from object side by the order of the first lens, the second lens and the 3rd lens by there are described first lens of positive focal power, described second lens with positive focal power and described 3rd lens with negative focal power are formed,
And meet following conditional,
－1.1＜f12/f3＜0 (1)
0.11＜D5/f＜0.7 (2)
－10.0＜RI/Y＜－2.0 (3)
Wherein,
F12: the synthesis focal length of above-mentioned first lens and above-mentioned second lens
F3: the focal length of above-mentioned 3rd lens
D5: the axial width of above-mentioned 3rd lens
F: the focal length of above-mentioned imaging lens system whole system
RI: the radius-of-curvature of the imaging surface of solid-state image pickup
Y: maximum image height.
2. imaging lens system according to claim 1, is characterized in that,
Above-mentioned first lens have the shape convex surface facing object side, meet following conditional,
0.7＜f1/f＜1.7 (4)
Wherein,
F1: the focal length of above-mentioned first lens.
3. imaging lens system according to claim 1, is characterized in that,
Above-mentioned second lens have the shape convex surface facing image side, meet following conditional,
－5＜R4/((n2－1)*f)＜－0.4 (5)
Wherein,
R4: the radius-of-curvature in the face, image side of above-mentioned second lens
N2: the refractive index relative to d line of above-mentioned second lens.
4. imaging lens system according to claim 2, is characterized in that,
Above-mentioned second lens have the shape convex surface facing image side, meet following conditional,
－5＜R4/((n2－1)*f)＜－0.4 (5)
Wherein,
R4: the radius-of-curvature in the face, image side of above-mentioned second lens
N2: the refractive index relative to d line of above-mentioned second lens.
5. imaging lens system as claimed in any of claims 1 to 4, is characterized in that,
Aperture diaphragm is configured with between above-mentioned first lens and above-mentioned second lens.
6. imaging lens system as claimed in any of claims 1 to 4, is characterized in that,
Be close to object side place in the object lateral location of the periphery of above-mentioned first lens of the effective diameter internal ratio of above-mentioned first lens and be configured with aperture diaphragm.
7. imaging lens system as claimed in any of claims 1 to 4, is characterized in that,
Also there are the lens in fact without focal power.
8. imaging lens system according to claim 5, is characterized in that,
Also there are the lens in fact without focal power.
9. imaging lens system according to claim 6, is characterized in that,
Also there are the lens in fact without focal power.
10. a camera head, is characterized in that, has:
Solid-state image pickup, it possesses photoelectric conversion part;
Substrate, it keeps above-mentioned solid-state image pickup, and is formed with the terminal for connecting portion of the transmitting-receiving for carrying out electric signal;
Imaging lens system in claim 1 ~ 9 described in any one; With
Housing, is formed by light-proofness material, and this imaging lens system built-in, and there is the peristome for making the light incidence from object side.
11. 1 kinds of portable terminal devices, is characterized in that, possess camera head according to claim 10.
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| PCT/JP2012/053622 WO2012114970A1 (en) | 2011-02-24 | 2012-02-16 | Imaging lens, imaging device, and portable terminal |
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| TWI475248B (en) | 2013-10-18 | 2015-03-01 | Largan Precision Co Ltd | Image capturing lens assembly, image capturing device and mobile terminal |
| TWI537589B (en) | 2015-01-07 | 2016-06-11 | 大立光電股份有限公司 | Optical imaging system, image capturing unit and electronic device |
| CN106842514B (en) * | 2017-04-18 | 2022-10-11 | 浙江舜宇光学有限公司 | Camera lens |
| WO2018192144A1 (en) | 2017-04-18 | 2018-10-25 | 浙江舜宇光学有限公司 | Camera lens |
| CN110007445B (en) | 2019-05-27 | 2024-04-16 | 浙江舜宇光学有限公司 | Optical imaging lens |
| CN110187477B (en) * | 2019-07-08 | 2024-04-26 | 浙江舜宇光学有限公司 | Optical imaging lens |
| CN112887518A (en) * | 2019-11-29 | 2021-06-01 | 南昌欧菲光电技术有限公司 | Camera module, preparation method thereof and intelligent terminal |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1673793A (en) * | 2004-03-24 | 2005-09-28 | 富士胶片株式会社 | Photographing lens having three lens elements |
| CN101216597A (en) * | 2007-12-28 | 2008-07-09 | 上海微电子装备有限公司 | Refraction and reflection projection optical system |
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| JP4046163B2 (en) * | 2003-05-27 | 2008-02-13 | 松下電器産業株式会社 | Imaging device |
| JP2006047944A (en) * | 2004-03-24 | 2006-02-16 | Fuji Photo Film Co Ltd | Photographing lens |
| JP4628781B2 (en) * | 2004-12-28 | 2011-02-09 | 富士フイルム株式会社 | Imaging device |
| JP5097058B2 (en) * | 2008-09-03 | 2012-12-12 | パナソニック株式会社 | Imaging lens and imaging apparatus using the same |
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| CN1673793A (en) * | 2004-03-24 | 2005-09-28 | 富士胶片株式会社 | Photographing lens having three lens elements |
| CN101216597A (en) * | 2007-12-28 | 2008-07-09 | 上海微电子装备有限公司 | Refraction and reflection projection optical system |
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Application publication date: 20131120 Assignee: Zhejiang Shunyu Optical Co., Ltd. Assignor: Konica Minolta Opto, Inc. Contract record no.: 2017990000500 Denomination of invention: Imaging lens, imaging device, and portable terminal Granted publication date: 20150715 License type: Exclusive License Record date: 20171229 |