CN104698575A - Zoom lens, lens unit and camera - Google Patents
Zoom lens, lens unit and camera Download PDFInfo
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- CN104698575A CN104698575A CN201410737277.2A CN201410737277A CN104698575A CN 104698575 A CN104698575 A CN 104698575A CN 201410737277 A CN201410737277 A CN 201410737277A CN 104698575 A CN104698575 A CN 104698575A
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B15/00—Optical objectives with means for varying the magnification
- G02B15/14—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective
- G02B15/16—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group
- G02B15/163—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group having a first movable lens or lens group and a second movable lens or lens group, both in front of a fixed lens or lens group
- G02B15/167—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group having a first movable lens or lens group and a second movable lens or lens group, both in front of a fixed lens or lens group having an additional fixed front lens or group of lenses
- G02B15/173—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group having a first movable lens or lens group and a second movable lens or lens group, both in front of a fixed lens or lens group having an additional fixed front lens or group of lenses arranged +-+
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Abstract
The invention provides a zoom lens, a lens unit having the zoom lens and a camera, thus matching wide angle and ensuring large relative hole diameter, and excellent correcting each aberration; the zoom lens comprises first to fifth lens assemblies arranged from the object side in sequence; the first lens assembly has a refraction part; the fourth lens assembly comprises a 41 lens and a 42 lens arranged in sequence from the object side; the fifth lens assembly comprises a 51 lens, a 52 lens and a 53lens arranged in sequence from the object side; a formula is followed, wherein f2 refers to the focus length of the second lens assembly; f4 refers to the focus length of the fourth lens; fw refers to the combined focus length of the whole system; beta 4w refers to a transverse amplification rate of a wide angel of the fourth lens assembly; beta 4T refers to a transverse amplification rate of a telescope end of the fourth lens assembly.
Description
Technical field
The present invention relates to zoom lens, lens unit and camera head, such as utilizing imaging apparatus to take the rest image of subject or the optical unit etc. of animation, especially relating to and there is high zoom and image blur correcting function and miniaturization, slimming, the zoom lens of wide angle, the lens unit possessing this zoom lens and camera head can be realized.
Background technology
In the past, as the optical system of gauge that can reduce camera, be widely used in zoom lens and use the reflection parts such as prism to make optical axis meander near the lens combination of object side i.e. the first lens combination) bending optical system.By such flexing optical system is equipped on camera, lens are not made to stretch out can take from camera body in use, therefore, it is possible to improve water proofing property, the resistance to impact of camera.
On the other hand, consider the demand of the slimming of camera head, recently, there is the demand of the high zoom of zoom lens, wide angle, heavy caliber.Disclose in following patent gazette and such optical system (for example, referring to patent documentation 1,2) corresponding to the demand of camera head.
Patent documentation 1: Japanese Unexamined Patent Publication 2011-70220 publication
Patent documentation 2: Japanese Unexamined Patent Publication 2011-141328 publication
But, the zoom lens described in patent documentation 1 be four groups relatively simple for structure, but there is the problem of the wide angle of focal length of can not realizing.In addition, the zoom lens described in patent documentation 2 is five groups of structures and can realizes the wide angle of focal length, but there is the problem of wide-angle side F number large (secretly), can not meet wide angle and the brightness of focal length simultaneously.
Summary of the invention
The present invention makes in view of the above problems, and object is the lens unit and the camera head that provide a kind of zoom lens and carry this zoom lens, and it can be tackled wide angle, guarantee large relative aperture, corrects each aberration well further.
At least one to achieve these goals, reflect the zoom lens of a side of the present invention by during the zoom configured successively from object side not movement there is the first lens combination, the zoom of positive focal power time along optical axis movement second lens combination with negative focal power, comprise aperture and zoom time not movement there is the 3rd lens combination, the zoom of positive focal power time along optical axis movement there is the 4th lens combination, the zoom of positive focal power time not movement the 5th lens combination form
Described first lens combination has for making the reflection part that optical axis is bending,
Described 4th lens combination is made up of the 41st lens with negative focal power, the 42nd lens with positive focal power successively from object side,
Described 5th lens combination from object side successively by having the 51st lens of negative focal power, the 52nd lens with positive focal power, the 53rd lens form, this zoom lens satisfies the following conditional expression:
-1.50<f2/fw<-1.00 (1)
3.30<f4/fw<4.30 (2)
0.3<|β4T/β4W|<1.0 (3)
Wherein,
F2: the focal length (mm) of described second lens combination
F4: the focal length (mm) of described 4th lens combination
Fw: the synthesis focal length (mm) of the whole system of wide-angle side
β 4W: the lateral magnification of the wide-angle side of described 4th lens combination
β 4T: the lateral magnification of the telescope end of described 4th lens combination.
Basic structure of the present invention is formed by having the first lens combination of positive focal power, second lens combination with negative focal power, the 3rd lens combination with positive focal power, the 4th lens combination with positive focal power and the 5th lens combination successively from object side.
And described first lens combination, described 3rd lens combination, described 5th lens combination become when zoom or focusing not along the structure of optical axis direction movement.By fixing described first lens combination, can not give prominence to, therefore, it is possible to avoid causing constriction to reference object by the lens of object side when taking.In addition, when camera head drops carelessly etc., if lean on the structure that the lens of object side are not given prominence to most, then the impact that the impact that can reduce to drop causes, therefore preferably such structure.And by fixing described 3rd lens combination, even if when described 3rd lens combination has iris ring mechanism, structure does not become complicated but simple mechanism yet.In addition, by fixing described 5th lens combination, the space leaned on most between the lens of image side and solid-state imager of described 5th lens combination can be closed, can prevent foreign matter or dust from entering imaging apparatus.
In addition, described second lens combination, described 4th lens combination are when zoom or focusing, become the structure along optical axis movement, when carrying out the zoom action from wide-angle side to telescope end, make described second lens combination to direction, image side one, and move to object side direction by making described 4th lens combination, anamorphosis function can be shared to two lens combination, therefore carrying out can suppressing lens combination focal power, zoom amount of movement compared with zoom with utilizing single lens group, compactedness and good optical property can be taken into account.
Described first lens combination has the reflection part for making optical axis bending (complications), and the axial size of incident light diminishes thus, therefore, it is possible to reduce the size (thickness) of the depth direction of camera head.
Described 4th lens combination is made up of the lens (the 41st lens) with negative focal power, the lens (the 42nd lens) with positive focal power successively from object side, can correct astigmatism well and guarantee high optical property thus.
Described 5th lens combination from object side by having the lens (the 51st lens) of negative focal power, the lens (the 52nd lens) with positive focal power, lens (the 53rd lens) form, become the combination of the lens with negative focal power and the lens with positive focal power, the generation of each aberrations such as ratio chromatism, can be suppressed thus.In addition, described 5th lens combination can have positive focal power, also can have negative focal power, and described 53rd lens can have positive focal power in addition, also can have negative focal power, also can not have focal power.
Conditional (1) is the conditional of the focal length specifying the focal power of described second lens combination, the wide-angle side of lens whole system.Prescribe a time limit lower than upper in the value of conditional (1), Po Ziwaer can be suppressed and correct to negative direction superfluous, exceed in limited time lower in the value of conditional (1), the amount of movement for described second lens combination of zoom can not become excessive, can make lens unit densification.In addition, preferably satisfy the following conditional expression.
-1.40<f2/fw<-1.00 (1)’
Conditional (2) is the conditional of the focal length of the described focal power of the 4th lens combination of regulation and the wide-angle side of lens whole system.When the value of conditional (2) exceedes lower limit, the focal power of described 4th lens combination can not become weak, even if guarantee that the amount of movement needed for zoom also can make optical system miniaturization.In addition, when the value of conditional (2) is lower than higher limit, the focal power of described 4th lens combination can not become too strong, and can effectively suppress the aberration produced at this to become excessive, and the optical property that can effectively suppress the foozle of described 4th lens combination to cause change is excessive.In addition, preferably satisfy the following conditional expression.
3.40<f4/fw<4.00 (2)’
Conditional (3) specifies the lateral magnification of telescope end and the lateral magnification of wide-angle side of described 4th lens combination.Prescribe a time limit lower than upper in the value of conditional (3), the undulate quantity of the curvature of field can not become excessive, easily utilizes other lenses group (lens combination in this case, beyond described 4th lens combination) to correct.On the contrary, exceed in the value of conditional (3) in limited time lower, easily obtain high zoom ratio.By the formula of satisfying condition (2), (3), improve the effect of conditional (1) further.In addition, preferably satisfy the following conditional expression.
0.3<|β4T/β4W|<0.9 (3)’
Above-mentioned zoom lens is arranged on the lens barrel kept described zoom lens by this lens unit.
The solid-state imager that this camera head is equipped with above-mentioned zoom lens, keeps the lens barrel of described zoom lens, the image utilizing this zoom lens to be formed is carried out to opto-electronic conversion.
The effect of invention
According to the present invention, can provide a kind of zoom lens, carry the lens unit of this zoom lens and camera head, it can tackle wide angle, guarantees large relative aperture, corrects each aberration well further.
Accompanying drawing explanation
Fig. 1 is the face side stereographic map of the camera head 10 of present embodiment.
Fig. 2 is the rear side stereographic map of the camera head 10 of present embodiment.
Fig. 3 (a) is the sectional view of the wide-angle side of the zoom lens of embodiment 1, and Fig. 3 (b) is the sectional view of the centre of the zoom lens of embodiment 1, and Fig. 3 (c) is the sectional view of the telescope end of the zoom lens of embodiment 1.
The aberration diagram of the spherical aberration of Fig. 4 to be (a) be wide-angle side of the zoom lens of embodiment 1, astigmatism and distortion, Fig. 4 (b) is the aberration diagram of the spherical aberration of the centre of the zoom lens of embodiment 1, astigmatism and distortion, and Fig. 4 (c) is the aberration diagram of the spherical aberration of the telescope end of the zoom lens of embodiment 1, astigmatism and distortion.
The sectional view of Fig. 5 to be (a) be wide-angle side of the zoom lens of embodiment 2, Fig. 5 (b) is the sectional view of the centre of the zoom lens of embodiment 2, and Fig. 5 (c) is the sectional view of the telescope end of the zoom lens of embodiment 2.
The aberration diagram of the spherical aberration of Fig. 6 to be (a) be wide-angle side of the zoom lens of embodiment 2, astigmatism and distortion, Fig. 6 (b) is the aberration diagram of the spherical aberration of the centre of the zoom lens of embodiment 2, astigmatism and distortion, and Fig. 6 (c) is the aberration diagram of the spherical aberration of the telescope end of the zoom lens of embodiment 2, astigmatism and distortion.
The sectional view of Fig. 7 to be (a) be wide-angle side of the zoom lens of embodiment 3, Fig. 7 (b) is the sectional view of the centre of the zoom lens of embodiment 3, and Fig. 7 (c) is the sectional view of the telescope end of the zoom lens of embodiment 3.
The aberration diagram of the spherical aberration of Fig. 8 to be (a) be wide-angle side of the zoom lens of embodiment 3, astigmatism and distortion, Fig. 8 (b) is the aberration diagram of the spherical aberration of the centre of the zoom lens of embodiment 3, astigmatism and distortion, and Fig. 8 (c) is the aberration diagram of the spherical aberration of the telescope end of the zoom lens of embodiment 3, astigmatism and distortion.
Fig. 9 (a) is the sectional view of the wide-angle side of the zoom lens of embodiment 4, and Fig. 9 (b) is the sectional view of the centre of the zoom lens of embodiment 4, and Fig. 9 (c) is the sectional view of the telescope end of the zoom lens of embodiment 4.
Figure 10 (a) is the aberration diagram of the spherical aberration of the wide-angle side of the zoom lens of embodiment 4, astigmatism and distortion, Figure 10 (b) is the aberration diagram of the spherical aberration of the centre of the zoom lens of embodiment 4, astigmatism and distortion, and Figure 10 (c) is the aberration diagram of the spherical aberration of the telescope end of the zoom lens of embodiment 4, astigmatism and distortion.
Figure 11 (a) is the sectional view of the wide-angle side of the zoom lens of embodiment 5, and Figure 11 (b) is the sectional view of the centre of the zoom lens of embodiment 5, and Figure 11 (c) is the sectional view of the telescope end of the zoom lens of embodiment 5.
The aberration diagram of the spherical aberration of Figure 12 to be (a) be wide-angle side of the zoom lens of embodiment 5, astigmatism and distortion, Figure 12 (b) is the aberration diagram of the spherical aberration of the centre of the zoom lens of embodiment 5, astigmatism and distortion, and Figure 12 (c) is the aberration diagram of the spherical aberration of the telescope end of the zoom lens of embodiment 5, astigmatism and distortion.
Embodiment
Be described with reference to the camera head of accompanying drawing to embodiment of the present invention.Fig. 1 is the face side stereographic map of the camera head 10 of present embodiment, and Fig. 2 is the rear side stereographic map of the camera head 10 of present embodiment.
Digital camera and camera head 10 have framework 12, and the lens barrel 50 of this framework 12 to the zoom lens (details are aftermentioned) of the curved shape that storage is made up of to the 5th lens combination the first lens combination successively from object side keeps and form external packing.As shown in Figure 1, 2, framework 12 has the thickness of fore-and-aft direction, the height of the above-below direction of the size larger than thickness, the width than the left and right directions of highly large size, is formed as flat thin rectangular shape tabular.
As shown in Figure 1, be provided with opening 12a at the position of the sidepiece of keeping right on the front surface top of framework 12, the first lens combination of zoom lens described later is arranged toward the front via opening 12a.
As shown in Figure 2, be provided with display screen 32 at the back side of framework 12, its picture (view data) captured by display with for carrying out and the operation screen of shooting, the relevant various setting operations of playback etc. or menu screen etc.Display screen 32 is utilized to form display part.As display screen 32, the existing known display device such as liquid crystal indicator or organic EL display can be adopted.
Release-push 34, power switch 36 is provided with at the upper surface of framework 12.Be provided with in the left side of the rear surface of framework 12: zoom operation switch 38, it is for adjusting to side of looking in the distance (distally) or wide-angle side (wide-angle side) the zoom rate to camera-lens system; Multiple operating switch 40, it carries out image pickup mode, the selection operation of option of the various operation such as switching of playback mode or the menu screen shown by display screen 32, the setting operation etc. of setting item.In addition, in FIG, Reference numeral 44 is flashlamp illuminating part, and Reference numeral 46 is storage card, and Reference numeral 48 is battery.
The action of the camera head of present embodiment is described.In Fig. 1,2, power switch 36 by carry out opening operation state under, by operating zoom operation switch 38, the second lens combination of zoom lens and the 3rd lens combination move along optical axis direction with the relation of regulation, realize zoom.Or, utilize known AF image planes function, the 4th lens combination moved along optical axis direction, realize focusing.
In addition, when pressing release-push 34, the imaging surface that subject light via zoom lens incidence incides imaging apparatus is converted to picture signal by the time shutter of the regulation of tripper defined, therefore carry out the image procossing specified at treating apparatus after, subject image based on this picture signal shows in display screen 32, and is stored in storage card 46.
Zoom lens by during the zoom configured successively from object side not movement there is the first lens combination, the zoom of positive focal power time along optical axis movement second lens combination with negative focal power, comprise aperture and zoom time not movement there is the 3rd lens combination, the zoom of positive focal power time along optical axis movement there is the 4th lens combination, the zoom of positive focal power time not movement the 5th lens combination form.First lens combination has for making the reflection part that optical axis is bending, 4th lens combination is made up of with the 42nd lens with positive focal power the 41st lens with negative focal power successively from object side, 5th lens combination from object side successively by having the 51st lens of negative focal power, the 52nd lens with positive focal power, the 53rd lens form, and satisfy the following conditional expression.
-1.50<f2/fw<-1.00 (1)
3.30<f4/fw<4.30 (2)
0.3<|β4T/β4W|<1.0 (3)
Wherein,
The focal length (mm) of the f2: the second lens combination
The focal length (mm) of the f4: the four lens combination
Fw: the synthesis focal length (mm) of the whole system of wide-angle side
The lateral magnification of the wide-angle side of β 4W: the four lens combination
The lateral magnification of the telescope end of β 4T: the four lens combination
Below, zoom lens is preferred embodiment described.
Described first lens combination of preferred above-mentioned zoom lens from object side successively by having the 11st lens of negative focal power, described reflection part, the 12nd lens with positive focal power form.
Described first lens combination from object side successively by the lens (the 11st lens) with negative focal power, for making the optical element (reflection part) of light path complications (bending), the lens (the 12nd lens) with positive focal power are formed, therefore, it is possible to the light height of the described reflection part incided for making light path complications is suppressed lower, described reflection part can be reduced, and especially owing to can configure from object side the group that the lens with negative focal power have the lens of positive focal power, so the correction of the coma of wide-angle side can be carried out well.
In addition, preferably satisfy the following conditional expression.
5<dL1PR/(2Y/fw)<8 (4)
Wherein,
DL1PR: the distance (mm) leaning on the position of image side most from the summit of the object side of described first lens to described reflection part
2Y: utilize described zoom lens to form the imaging surface of the solid-state imager of image to angular length (mm)
Conditional (4) is defined in described first lens combination, from the object side of lens being more positioned at object side than described reflection part to the imaging surface of the distance in the face, image side of described reflection part, described solid-state imager to the relation of the focal length of the lens whole system of angular length, wide-angle side.Specifically, exceed in limited time lower in the value of conditional (4), relative to the field angle of wide-angle side, the distance in the face, image side from the object side of the lens being more positioned at object side than described reflection part to described reflection part can be suppressed to become too small, owing to reducing the effective diameter of described first lens combination of wide-angle side so easily carry out off-axis aberration correction, good optical property can be guaranteed.On the other hand, prescribe a time limit lower than upper in the value of conditional (4), the gauge of camera head can be suppressed to become excessive, can compactedness be guaranteed, in addition, preferably satisfy the following conditional expression.
6<dL1PR/(2Y/fw)<7 (4)’
In addition, preferably satisfy the following conditional expression.
1.0<f1/(fw×Fnow)<1.5 (5)
F1: the focal length (mm) of described first lens combination
Fnow: the F number of wide-angle side
Conditional (5) specifies the relation of the focal length of described first lens combination, the focal length of the lens whole system of wide-angle side, the F number of wide-angle side.Specifically, exceed in limited time lower in the value of conditional (5), relative to the focal power of the lens whole system of wide-angle side, the focal power of described first lens combination can not become weak, can suppress the aberration of wide-angle side, can guarantee good optical property.Prescribe a time limit lower than upper in the value of conditional (5), relative to the focal power of the lens whole system of wide-angle side, the focal power of described first lens combination can not become too strong, and the gauge of camera head can be suppressed to become excessive, can guarantee compactedness.In addition, preferably satisfy the following conditional expression.
1.1<f1/(fw×Fnow)<1.4 (5)’
In addition, preferably satisfy the following conditional expression.
2.0<|β2T/β2W|<3.0 (6)
β 2W: the lateral magnification of the wide-angle side of described second lens combination
β 2T: the lateral magnification of the telescope end of described second lens combination
The ratio of conditional (6) the regulation wide-angle side of whole system and the lateral magnification of the second lens combination of the telescope end of whole system.Prescribe a time limit lower than upper in the value of conditional (6), can high zoom be guaranteed and can aberration correction be carried out.On the other hand, exceed in the value of conditional (6) in limited time lower, high zoom ratio can be obtained.In addition, preferably satisfy the following conditional expression.
2.2<|β2T/β2W|<2.7 (6)’
In addition, described 52nd lens of described 5th lens combination are by moving the image blurring image blur correcting lens corrected in image planes to the direction vertical with optical axis, preferably satisfying the following conditional expression.
0.3<(1-β52T)×β53T<0.9 (7)
Wherein,
β 52T: the lateral magnification of the telescope end of the 52nd lens of described 5th lens combination
β 53T: the lateral magnification of the telescope end of the 53rd lens of described 5th lens combination
By make the lens (the 52nd lens) with positive focal power of described 5th lens combination along the direction vertical with optical axis move and can correcting image fuzzy.When zoom, focusing by making the 52nd lens along optical axis direction not described 5th lens combination of movement move along the direction vertical with optical axis, driving mechanism and other driving mechanisms that can eliminate jitter correction are interfered, therefore, it is possible to realize miniaturization further.And, because described 52nd lens are the lens with positive focal power, so can ratio chromatism, be suppressed, therefore, it is possible to guarantee high optical property.
The conditional of conditional (7) to be regulation picture relative to the unit amount of movement of the lens (the 52nd lens) with positive focal power of described 5th lens combination of the movement when jitter correction move how many these ratios.Specifically, exceed in limited time lower in the value of conditional (7), owing to making the lens moving needed for the mobile a certain ormal weight of picture can not become excessive, so necessary space can be suppressed to become excessive.Prescribe a time limit lower than upper in the value of conditional (7), owing to making the lens moving needed for the mobile a certain ormal weight of picture can not become too small, high precision is not required to the control of drive unit, so the cost of camera head can be suppressed.In addition, preferably satisfy the following conditional expression.
0.3<(1-β52T)×β53T<0.8 (7)’
In addition, preferably described 53rd lens of described 5th lens combination are formed by plastics.Because described 53rd lens of described 5th lens combination are formed by plastic lens, so easily aspherical shape can be added to described 53rd lens, can each aberration correction be carried out and guarantee high optical property.And, light weight more cheap than plastics with glassy phase, therefore contributes to cost reduction, lightweight.
In addition, preferably satisfy the following conditional expression.
0.3<|fp/ft| (8)
Fp: the focal length (mm) of described 53rd lens
Ft: the synthesis focal length (mm) of the whole system of telescope end
Conditional (8) is the conditional of regulation described 53rd lens and the ratio of the focal length of the telescope end of whole system.Specifically, exceed in limited time lower in the value of conditional (8), power of lens can not become too strong, and the impact of the change of the temperature variation refractive index of plastics can not become excessive, focus can be suppressed to depart from or optical property variation.In addition, preferably satisfy the following conditional expression.
0.3<|fp/ft|<10 (8)’
Prescribing a time limit lower than the upper of conditional (8) ', power of lens can not become weak, the size of image pickup optical system entirety can be suppressed to become excessive, can guarantee compactedness.
In addition, preferably satisfy the following conditional expression.
1.0<d2wt/d4wt<1.7 (9)
D2wt: the second lens combination described in when zoom moves to the distance (mm) of telescope end from wide-angle side
D4wt: the 4th lens combination described in when zoom moves to the distance (mm) of telescope end from wide-angle side
Described second lens combination of movement during conditional (9) regulation zoom and the conditional of the ratio of the amount of movement of described 4th lens combination.Specifically, exceed in limited time lower in the value of conditional (9), the amount of movement of described second lens combination can not become very few compared with the amount of movement of described 4th lens combination, the zoom effect of described second lens combination can not become too small, even if make the 4th lens combination bear corresponding zoom effect, because the effective diameter after described 4th lens combination can not increase too much, so can guarantee the slimming of camera head.In addition, even if guarantee the zoom effect of described second lens combination, the focal power of described second lens combination also can not become too strong, and easily guarantees optical property, and error-sensitivity can not become excessive.On the other hand, prescribe a time limit lower than upper in the value of conditional (9), the amount of movement of described second lens combination can not become too much compared with the amount of movement of described 4th lens combination, the distance of the lens of object side of leaning on most from described aperture to described first lens combination can not become excessive, and the effective diameter of described first lens can be suppressed to become large.
In addition, preferably aperture is configured in the object side of described 3rd lens combination.More object side is leaned on than the lens of described 3rd lens combination of the substantially central portion being positioned at described zoom lens by being arranged on by described aperture, off-axis aberration can be corrected evenly, front lens diameter (than described aperture more by each lens diameter of object side configuration) rear lens diameter (than described aperture more by each lens diameter of image side configuration) is difficult to produce large difference, therefore exist and easily make the lens unit shape on the thickness direction of camera head smooth, the advantage of the layout degree of freedom raising of camera head.
In addition, preferably described 41st lens of described 4th lens combination and described 42nd lens are cemented lens.By making described 41st lens engage with described 42nd lens, group parts are suppressed to be one, can as the easier zoom lens of production management compared with when making all lens of the 4th lens combination be simple lens.In addition, the distance of image pickup optical system entirety can be shortened.In addition, when not being cemented lens, compared with being the situation of cemented lens, because the degree of freedom of optical surface increases, so can aberration correction well.
In addition, focus preferably by making described 4th lens combination move along optical axis.Closer object by utilizing described 4th lens combination to focus, the increase of the increase of the optical full length of stretching out, front lens diameter can not be caused, until can both carry out suitable focusing and obtain clearly image.
In addition, described zoom lens can have the lens in fact without focal power.
Below, illustrate the embodiment of the zoom lens that can use in the camera head 10 of Fig. 1, but the present invention is not limited thereto.The symbol used in embodiments is as follows.In addition, in lens data described later, represent that the unit of length is mm.
F: the focal length (mm) of zoom lens whole system
Fno:F number
R: radius-of-curvature (mm)
D: above axle interval (mm)
Nd: the refractive index relative to d line of lens material
ν d: the Abbe number of the d line of lens material
2Y: the imaging surface diagonal line length (mm) of solid-state imager
In embodiments, the face marking " * " after each sequence number is the face with aspherical shape, and aspheric shape is with the summit in face for initial point, take optical axis direction as X-axis, with the height in the direction vertical with optical axis for h, and Ru shown in following " mathematical expression 1 ".
[mathematical expression 1]
Wherein,
Ai:i asphericity coefficient
R: radius-of-curvature
K: the constant of the cone
In addition, after this (comprise the lens data in table) and use E (such as 2.5E-02) to represent the exponential (such as 2.5 × 10 of 10
-02).
(embodiment 1)
The lens data of the zoom lens of embodiment 1 is as shown in table 1.In addition, Fig. 3 (a) represents the sectional view of the wide-angle side of the zoom lens of EXAMPLE l, Fig. 3 (b) represents the sectional view of the centre of the zoom lens of embodiment 1, and Fig. 3 (c) represents the sectional view of the telescope end of the zoom lens of embodiment 1.And, Fig. 4 (a) represents the aberration diagram of the spherical aberration of the wide-angle side of the zoom lens of embodiment 1, astigmatism and distortion, Fig. 4 (b) represents the aberration diagram of the spherical aberration of the centre of the zoom lens of embodiment 1, astigmatism and distortion, and Fig. 4 (c) represents the aberration diagram of the spherical aberration of the telescope end of the zoom lens of embodiment 1, astigmatism and distortion.In addition, in aberration diagram after this, in spherical aberration figure, solid line represents d line, and dotted line represents g line, and in astigmatism figure, solid line represents that arc loses image planes, and dotted line represents meridianal image surface.
[table 1]
Embodiment 1
F=4.43-9.66-21.06 [wide-angle, centre, look in the distance]
Fno=2.88-4.50-5.05 [wide-angle, centre, look in the distance]
Zoom ratio=4.75
Asphericity coefficient
The focal length of each position, F number, group spacing
Lens combination data
The zoom lens of embodiment 1 along optical axis from object side successively by during zoom not movement there is the first lens combination Gr1, the zoom of positive focal power time along optical axis movement the second lens combination Gr2 with negative focal power, comprise aperture S and zoom time not movement there is the 3rd lens combination Gr3, the zoom of positive focal power time along optical axis movement there is the 4th lens combination Gr4, the zoom of positive focal power time not movement the 5th lens combination Gr5 form.Be configured with between lens combination Gr5 and the imaging surface IM of solid-state imager the 5th and implement the infrared intercepting filter F of infrared ray cut coating at optical surface, cover the seal glass CG of the imaging surface IM of solid-state imager.
First lens combination Gr1 from object side successively by have negative focal power the 11st lens L11, form for the reflection part that makes optical axis bend and prism ML, the 12nd lens L12 with positive focal power.Second lens combination Gr2 from object side successively by having the 21st lens L21 of positive focal power, the 22nd lens L22 with negative focal power, the 23rd lens L23 with positive focal power forms.22nd lens L22 and the 23rd lens L23 is the cemented lens be bonded with each other.3rd lens combination Gr3 is made up of aperture S, the 31st lens L31 with positive focal power successively from object side.4th lens combination Gr4 is made up of the 41st lens L41 with negative focal power, the 42nd lens L42 with positive focal power successively from object side.41st lens L41 and the 42nd lens L42 is the cemented lens be bonded with each other.5th lens combination Gr5 from object side successively by having the 51st lens L51 of negative focal power, the 52nd lens L52 with positive focal power, the 53rd lens L53 form.In addition, when focusing, the 4th lens combination Gr4 moves along optical axis direction.And when jitter correction, the 52nd lens L52 of the 5th lens combination Gr5 moves along the direction vertical with optical axis.53rd lens L53 is formed by plastics.
(embodiment 2)
The lens data of the zoom lens of embodiment 2 is as shown in table 2.In addition, Fig. 5 (a) represents the sectional view of the wide-angle side of the zoom lens of embodiment 2, Fig. 5 (b) represents the sectional view of the centre of the zoom lens of embodiment 2, and Fig. 5 (c) represents the sectional view of the telescope end of the zoom lens of embodiment 2.And, Fig. 6 (a) represents the aberration diagram of the spherical aberration of the wide-angle side of the zoom lens of embodiment 2, astigmatism and distortion, Fig. 6 (b) represents the aberration diagram of the spherical aberration of the centre of the zoom lens of embodiment 2, astigmatism and distortion, and Fig. 6 (c) represents the aberration diagram of the spherical aberration of the telescope end of the zoom lens of embodiment 2, astigmatism and distortion.
[table 2]
Embodiment 2
F=4.43-9.65-21.05 [wide-angle, centre, look in the distance]
Fno=2.88-4.46-5.17 [wide-angle, centre, look in the distance]
Zoom ratio=4.75
Asphericity coefficient
The focal length of each position, F number, group spacing
Lens combination data
The zoom lens of embodiment 2 along optical axis from object side successively by during zoom not movement there is the first lens combination Gr1, the zoom of positive focal power time along optical axis movement the second lens combination Gr2 with negative focal power, comprise aperture S and zoom time not movement there is the 3rd lens combination Gr3, the zoom of positive focal power time along optical axis movement there is the 4th lens combination Gr4, the zoom of positive focal power time not movement the 5th lens combination Gr5 form.Be configured with between lens combination Gr5 and the imaging surface IM of solid-state imager the 5th and implement the infrared intercepting filter F of infrared ray cut coating at optical surface, cover the seal glass CG of the imaging surface IM of solid-state imager.
First lens combination Gr1 from object side successively by have negative focal power the 11st lens L11, form for the reflection part that makes optical axis bend and prism ML, the 12nd lens L12 with positive focal power.Second lens combination Gr2 from object side successively by having the 21st lens L21 of positive focal power, the 22nd lens L22 with negative focal power, the 23rd lens L23 with positive focal power forms.22nd lens L22 and the 23rd lens L23 is the cemented lens be bonded with each other.3rd lens combination Gr3 is made up of aperture S, the 31st lens L31 with positive focal power successively from object side.4th lens combination Gr4 is made up of the 41st lens L41 with negative focal power, the 42nd lens L42 with positive focal power successively from object side.41st lens L41 and the 42nd lens L42 is the cemented lens be bonded with each other.5th lens combination Gr5 from object side successively by having the 51st lens L51 of negative focal power, the 52nd lens L52 with positive focal power, the 53rd lens L53 form.In addition, when focusing, the 4th lens combination Gr4 moves along optical axis direction.And when jitter correction, the 52nd lens L52 of the 5th lens combination Gr5 moves along the direction vertical with optical axis.53rd lens L53 is formed by plastics.
(embodiment 3)
The lens data of the zoom lens of embodiment 3 is as shown in table 3.In addition, Fig. 7 (a) represents the sectional view of the wide-angle side of the zoom lens of embodiment 3, Fig. 7 (b) represents the sectional view of the centre of the zoom lens of embodiment 3, and Fig. 7 (c) represents the sectional view of the telescope end of the zoom lens of embodiment 3.And, Fig. 8 (a) represents the aberration diagram of the spherical aberration of the wide-angle side of the zoom lens of embodiment 3, astigmatism and distortion, Fig. 8 (b) represents the aberration diagram of the spherical aberration of the centre of the zoom lens of embodiment 3, astigmatism and distortion, and Fig. 8 (c) represents the aberration diagram of the spherical aberration of the telescope end of the zoom lens of embodiment 3, astigmatism and distortion.
[table 3]
Embodiment 3
F=4.42-9.66-20.98 [wide-angle, centre, look in the distance]
Fno=2.88-4.49-5.01 [wide-angle, centre, look in the distance]
Zoom ratio=4.75
Asphericity coefficient
The focal length of each position, F number, group spacing
Lens combination data
The zoom lens of embodiment 3 along optical axis from object side successively by during zoom not movement there is the first lens combination Gr1, the zoom of positive focal power time along optical axis movement the second lens combination Gr2 with negative focal power, comprise aperture S and zoom time not movement there is the 3rd lens combination Gr3, the zoom of positive focal power time along optical axis movement there is the 4th lens combination Gr4, the zoom of positive focal power time not movement the 5th lens combination Gr5 form.Be configured with between lens combination Gr5 and the imaging surface IM of solid-state imager the 5th and implement the infrared intercepting filter F of infrared ray cut coating at optical surface, cover the seal glass CG of the imaging surface IM of solid-state imager.
First lens combination Gr1 from object side successively by have negative focal power the 11st lens L11, form for the reflection part that makes optical axis bend and prism ML, the 12nd lens L12 with positive focal power.Second lens combination Gr2 from object side successively by having the 21st lens L21 of positive focal power, the 22nd lens L22 with negative focal power, the 23rd lens L23 with positive focal power forms.22nd lens L22 and the 23rd lens L23 is the cemented lens be bonded with each other.3rd lens combination Gr3 is made up of aperture S, the 31st lens L31 with positive focal power successively from object side.4th lens combination Gr4 is made up of the 41st lens L41 with negative focal power, the 42nd lens L42 with positive focal power successively from object side.5th lens combination Gr5 from object side successively by having the 51st lens L51 of negative focal power, the 52nd lens L52 with positive focal power, the 53rd lens L53 form.In addition, when focusing, the 4th lens combination Gr4 moves along optical axis direction.And when jitter correction, the 52nd lens L52 of the 5th lens combination Gr5 moves along the direction vertical with optical axis.53rd lens L53 is formed by plastics.
(embodiment 4)
The lens data of the zoom lens of embodiment 4 is as shown in table 4.In addition, Fig. 9 (a) represents the sectional view of the wide-angle side of the zoom lens of embodiment 4, Fig. 9 (b) represents the sectional view of the centre of the zoom lens of embodiment 4, and Fig. 9 (c) represents the sectional view of the telescope end of the zoom lens of embodiment 4.In addition, Figure 10 (a) represents the aberration diagram of the spherical aberration of the wide-angle side of the zoom lens of embodiment 4, astigmatism and distortion, Figure 10 (b) represents the aberration diagram of the spherical aberration of the centre of the zoom lens of embodiment 4, astigmatism and distortion, and Figure 10 (c) represents the aberration diagram of the spherical aberration of the telescope end of the zoom lens of embodiment 4, astigmatism and distortion.
[table 4]
Embodiment 4
F=4.43-9.57-21.05 [wide-angle, centre, look in the distance]
Fno=2.88-4.54-5.07 [wide-angle, centre, look in the distance]
Zoom ratio=4.75
Asphericity coefficient
The focal length of each position, F number, group spacing
Lens combination data
The zoom lens of embodiment 4 along optical axis from object side successively by during zoom not movement there is the first lens combination Gr1, the zoom of positive focal power time along optical axis movement the second lens combination Gr2 with negative focal power, comprise aperture S and zoom time not movement there is the 3rd lens combination Gr3, the zoom of positive focal power time along optical axis movement there is the 4th lens combination Gr4, the zoom of positive focal power time not movement the 5th lens combination Gr5 form.Be configured with between lens combination Gr5 and the imaging surface IM of solid-state imager the 5th and implement the infrared intercepting filter F of infrared ray cut coating at optical surface, cover the seal glass CG of the imaging surface IM of solid-state imager.
First lens combination Gr1 from object side successively by have negative focal power the 11st lens L11, for making the reflection part of optical axis flexing and prism ML, there is the 12nd lens L12 of positive focal power form.Second lens combination Gr2 from object side successively by having the 21st lens L21 of positive focal power, the 22nd lens L22 with negative focal power, the 23rd lens L23 with positive focal power forms.22nd lens L22 and the 23rd lens L23 is the cemented lens be bonded with each other.3rd lens combination Gr3 is made up of aperture S, the 31st lens L31 with positive focal power successively from object side.4th lens combination Gr4 is made up of the 41st lens L41 with negative focal power, the 42nd lens L42 with positive focal power successively from object side.41st lens L41 and the 42nd lens L42 is the cemented lens be bonded with each other.5th lens combination Gr5 from object side successively by having the 51st lens L51 of negative focal power, the 52nd lens L52 with positive focal power, the 53rd lens L53 form.In addition, when focusing, the 4th lens combination Gr4 moves along optical axis direction.And when jitter correction, the 52nd lens L52 of the 5th lens combination Gr5 is along the direction displacement vertical with optical axis.53rd lens L53 is formed by plastics.
(embodiment 5)
The lens data of the zoom lens of embodiment 5 is as shown in table 5.In addition, Figure 11 (a) represents the sectional view of the wide-angle side of the zoom lens of embodiment 5, Figure 11 (b) represents the sectional view of the centre of the zoom lens of embodiment 5, and Figure 11 (c) represents the sectional view of the telescope end of the zoom lens of embodiment 5.In addition, Figure 12 (a) represents the aberration diagram of the spherical aberration of the wide-angle side of the zoom lens of embodiment 5, astigmatism and distortion, Figure 12 (b) represents the aberration diagram of the spherical aberration of the centre of the zoom lens of embodiment 5, astigmatism and distortion, and Figure 12 (c) represents the aberration diagram of the spherical aberration of the telescope end of the zoom lens of embodiment 5, astigmatism and distortion.
[table 5]
Embodiment 5
F=4.43-9.66-21.03 [wide-angle, centre, look in the distance]
Fno=2.88-4.37-5.07 [wide-angle, centre, look in the distance]
Zoom ratio=4.75
Asphericity coefficient
The focal length of each position, F number, group spacing
Lens combination data
The zoom lens of embodiment 5 along optical axis from object side successively by during zoom not movement there is the first lens combination Gr1, the zoom of positive focal power time along optical axis movement the second lens combination Gr2 with negative focal power, comprise aperture S and zoom time not movement there is the 3rd lens combination Gr3, the zoom of positive focal power time along optical axis movement there is the 4th lens combination Gr4, the zoom of positive focal power time not movement the 5th lens combination Gr5 form.The seal glass CG of the infrared intercepting filter F implementing infrared ray cut coating on optical surface, the imaging surface IM covering solid-state imager is configured with between lens combination Gr5 and the imaging surface IM of solid-state imager the 5th.
First lens combination Gr1 from object side successively by have negative focal power the 11st lens L11, form for the reflection part that makes optical axis bend and prism ML, the 12nd lens L12 with positive focal power.Second lens combination Gr2 from object side successively by having the 21st lens L21 of positive focal power, the 22nd lens L22 with negative focal power, the 23rd lens L23 with positive focal power forms.22nd lens L22 and the 23rd lens L23 is the cemented lens be bonded with each other.3rd lens combination Gr3 is made up of aperture S, the 31st lens L31 with positive focal power successively from object side.4th lens combination Gr4 is made up of the 41st lens L41 with negative focal power, the 42nd lens L42 with positive focal power successively from object side.41st lens L41 and the 42nd lens L42 is the cemented lens be bonded with each other.5th lens combination Gr5 from object side successively by having the 51st lens L51 of negative focal power, the 52nd lens L52 with positive focal power, the 53rd lens L53 form.In addition, when focusing, the 4th lens combination Gr4 moves along optical axis direction.And when jitter correction, the 52nd lens L52 of the 5th lens combination Gr5 moves along the direction vertical with optical axis.53rd lens L53 is formed by plastics.
The mathematical expression corresponding with above-described embodiment and for each numerical value of calculating each mathematical expression as shown in table 6,7 arranges.
[table 6]
[table 7]
The invention is not restricted to the embodiment described in this instructions or embodiment, to those skilled in the art, other embodiments, variation can be obtained apparently from the embodiment described in this instructions, embodiment or technological thought.Such as, the situation in fact without the pseudo-lens of focal power is installed further also in the scope of application of the present invention.
Description of reference numerals
10 camera heads
12 frameworks
12a opening
32 display screens
34 release-pushes
36 power switches
38 zoom operation switches
40 operating switchs
50 lens barrels
F infrared intercepting filter
Grl ~ Gr5 lens combination
ML prism (reflection part)
S aperture
CG seal glass
IM solid-state imager
Claims (15)
1. a zoom lens, its by during the zoom configured successively from object side not movement there is the first lens combination, the zoom of positive focal power time along optical axis movement second lens combination with negative focal power, comprise aperture and zoom time not movement there is the 3rd lens combination, the zoom of positive focal power time along optical axis movement there is the 4th lens combination, the zoom of positive focal power time not movement the 5th lens combination form
The feature of this zoom lens is,
Described first lens combination has for making the reflection part that optical axis is bending,
Described 4th lens combination is made up of the 41st lens with negative focal power, the 42nd lens with positive focal power successively from object side,
Described 5th lens combination from object side successively by having the 51st lens of negative focal power, the 52nd lens with positive focal power, the 53rd lens form, this zoom lens satisfies the following conditional expression:
-1.50<f2/fw<-1.00 (1)
3.30<f4/fw<4.30 (2)
0.3<|β4T/β4W|<1.0 (3)
Wherein,
F2: the focal length (mm) of described second lens combination
F4: the focal length (mm) of described 4th lens combination
Fw: the synthesis focal length (mm) of the whole system of wide-angle side
β 4W: the lateral magnification of the wide-angle side of described 4th lens combination
β 4T: the lateral magnification of the telescope end of described 4th lens combination.
2. zoom lens according to claim 1, is characterized in that,
Described first lens combination from object side successively by having the 11st lens of negative focal power, described reflection part, the 12nd lens with positive focal power form.
3. zoom lens according to claim 1, is characterized in that, satisfies the following conditional expression:
5<dL1PR/(2Y/fw)<8 (4)
Wherein,
DL1PR: the distance (mm) leaning on the position of image side most from the summit of the object side of described first lens to described reflection part
2Y: utilize described zoom lens to form the imaging surface of the solid-state imager of image to angular length (mm).
4. zoom lens according to claim 1, is characterized in that, satisfies the following conditional expression:
1.0<f1/(fw×Fnow)<1.5 (5)
F1: the focal length (mm) of described first lens combination
Fnow: the F number of wide-angle side.
5. zoom lens according to claim 1, is characterized in that, satisfies the following conditional expression:
2.0<|β2T/β2W|<3.0 (6)
β 2W: the lateral magnification of the wide-angle side of described second lens combination
β 2T: the lateral magnification of the telescope end of described second lens combination.
6. zoom lens according to claim 1, is characterized in that,
Described 52nd lens of described 5th lens combination are by moving the image blurring image blur correcting lens corrected in image planes to the direction vertical with optical axis, and satisfy the following conditional expression:
0.3<(1-β52T)×β53T<0.9 (7)
Wherein,
β 52T: the lateral magnification of the telescope end of the 52nd lens of described 5th lens combination
β 53T: the lateral magnification of the telescope end of the 53rd lens of described 5th lens combination.
7. the zoom lens according to claim l, is characterized in that,
Described 53rd lens of described 5th lens combination are formed by plastics.
8. zoom lens according to claim 1, is characterized in that, satisfies the following conditional expression:
0.3<|fp/ft| (8)
Fp: the focal length (mm) of described 53rd lens
Ft: the synthesis focal length (mm) of the whole system of telescope end.
9. zoom lens according to claim 1, is characterized in that, satisfies the following conditional expression:
1.0<d2wt/d4wt<1.7 (9)
D2wt: the second lens combination described in when zoom moves to the distance (mm) of telescope end from wide-angle side
D4wt: the 4th lens combination described in when zoom moves to the distance (mm) of telescope end from wide-angle side.
10. zoom lens according to claim 1, is characterized in that,
At the object side configuration aperture of described 3rd lens combination.
11. zoom lens according to claim 1, is characterized in that,
Described 41st lens and described 42nd lens of described 4th lens combination are cemented lens.
12. zoom lens according to claim 1, is characterized in that,
Focus by making described 4th lens combination move along optical axis.
13. zoom lens according to claim 1, is characterized in that,
Described zoom lens has the lens in fact without focal power.
14. 1 kinds of lens units, is characterized in that,
Zoom lens according to any one of claim 1 to 13 is arranged on the lens barrel that described zoom lens is kept.
15. a camera head, it is characterized in that, be equipped with the zoom lens according to any one of claim 1 to 13; Keep the lens barrel of described zoom lens; The image formed by this zoom lens is carried out to the solid-state imager of opto-electronic conversion.
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| JP2013252797A JP6323742B2 (en) | 2013-12-06 | 2013-12-06 | Zoom lens, lens unit, and imaging apparatus |
| JP2013-252797 | 2013-12-06 |
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Cited By (2)
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|---|---|---|---|---|
| CN108459404A (en) * | 2017-02-17 | 2018-08-28 | 富士胶片株式会社 | Zoom lens and photographic device |
| CN111897115A (en) * | 2020-07-31 | 2020-11-06 | 中国科学院西安光学精密机械研究所 | Continuous zooming optical system with heat dissipation and wide pressure adaptability |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2022013958A (en) * | 2018-11-01 | 2022-01-19 | 株式会社ニコン | Relay optical system and telescope having relay optical system |
| JP7433875B2 (en) | 2019-12-11 | 2024-02-20 | キヤノン株式会社 | Optical system and imaging device |
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| JPH06109976A (en) * | 1992-04-14 | 1994-04-22 | Olympus Optical Co Ltd | Lens with large power variation |
| CN101373263A (en) * | 2007-08-22 | 2009-02-25 | 索尼株式会社 | Zoom lens and image-capture device |
| JP2010008679A (en) * | 2008-06-26 | 2010-01-14 | Sony Corp | Zoom lens and imaging apparatus |
| JP2013044757A (en) * | 2011-08-19 | 2013-03-04 | Konica Minolta Advanced Layers Inc | Zoom lens and imaging apparatus |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008083125A (en) * | 2006-09-26 | 2008-04-10 | Olympus Imaging Corp | Zoom lens and imaging apparatus using the same |
| JPWO2012090757A1 (en) * | 2010-12-27 | 2014-06-05 | コニカミノルタ株式会社 | Zoom lens and imaging device |
| JP6153310B2 (en) * | 2012-10-30 | 2017-06-28 | キヤノン株式会社 | Zoom lens and imaging apparatus having the same |
-
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06109976A (en) * | 1992-04-14 | 1994-04-22 | Olympus Optical Co Ltd | Lens with large power variation |
| CN101373263A (en) * | 2007-08-22 | 2009-02-25 | 索尼株式会社 | Zoom lens and image-capture device |
| JP2010008679A (en) * | 2008-06-26 | 2010-01-14 | Sony Corp | Zoom lens and imaging apparatus |
| JP2013044757A (en) * | 2011-08-19 | 2013-03-04 | Konica Minolta Advanced Layers Inc | Zoom lens and imaging apparatus |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108459404A (en) * | 2017-02-17 | 2018-08-28 | 富士胶片株式会社 | Zoom lens and photographic device |
| CN108459404B (en) * | 2017-02-17 | 2021-09-24 | 富士胶片株式会社 | Zoom lens and image pickup apparatus |
| CN111897115A (en) * | 2020-07-31 | 2020-11-06 | 中国科学院西安光学精密机械研究所 | Continuous zooming optical system with heat dissipation and wide pressure adaptability |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104698575A9 (en) | 2017-06-09 |
| JP6323742B2 (en) | 2018-05-16 |
| CN104698575B (en) | 2017-11-10 |
| JP2015111185A (en) | 2015-06-18 |
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