CN102636865B - Zoom lens, camera, information device and portable information terminal device - Google Patents
Zoom lens, camera, information device and portable information terminal device Download PDFInfo
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- CN102636865B CN102636865B CN201210022663.4A CN201210022663A CN102636865B CN 102636865 B CN102636865 B CN 102636865B CN 201210022663 A CN201210022663 A CN 201210022663A CN 102636865 B CN102636865 B CN 102636865B
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Abstract
The present invention relates to a zoom lens, a camera with the zoom lens as a photographing optical system, an information device and a portable information terminal device. The invention aims to provide a high-performance small-size zoom lens which has the following advantages: high setting density of focusing lens set, small focusing movement amount, high semi visual angle which is above 36.8 DEG at wide angle, zoom ratio in about 1.5-5 times, and high definition which corresponds to the photographing component with pixels between 5,000,000 and 10,000,000. The zoom lens is provided with the following components from a photographed member side along an optical axis: a first lens group (G1) which has positive refraction power, a second lens group (G2) which has negative refraction power, a third lens group (G3) which has negative refraction power, a fourth lens group (G4) which has positive refraction power, and a fifth lens group (G5) which has positive refraction power. The third lens group performs focusing. The focal lengths and wide angles of the second lens group and the third lens group and a geometric mean of the whole system focal length in looking in the distance satisfy a preset conditional expression.
Description
Technical field
The present invention relates to zoom lens, with this zoom lens as the camera of photographic optical system, massaging device and carrying type information terminal device.
Background technology
In recent years, zoom lens is widely used in the massaging devices such as digital camera as photographic optical system.Especially focal range reaches visual angle when converting with 35mm silver cameras to be about the zoom lens of 50mm widely known.For these zoom lens, user proposes the requirements such as miniaturization, wide angle, automatic focus high speed further.
Above-mentioned zoom lens be have the first lens set setting gradually from subject one side to imaging surface one side and there is positive refractive power and second lens set with negative refractive power and follow-up lens set structure, the leading type of the positive eyeglass of what is called (Positive-Lead type) zoom lens that large zoom ratio and lens length miniaturization both sides can be taken into account.This kind of zoom lens has specific descriptions in patent documentation 1 ~ 5 (JP Laid-Open 3-228008, Unexamined Patent 10-48518, Unexamined Patent 11-44848, JP 2000-28923, JP 2010-175954 publication).And adopting the reason of said structure to be first easily to improve zoom ratio, next is that positive lens set look-ahead structure is conducive to reducing camera lens entire length.
About the type of focusing of this kind of zoom lens in prior art, first there is the mode of disclosed mobile second lens set such as patent documentation 1 grade, i.e. so-called internal focus mode.This internal focus mode because the lens set weight be moved is comparatively large when focusing on, therefore needs larger drive motor or actuator, causes the maximum gauge of lens barrel to increase.
To this, patent documentation 2 ~ 5 proposes the method alleviating focusing lens group weight, namely first lens set with positive refractive power, second lens set with negative refractive power, the 3rd lens set with negative refractive power and follow-up lens set after this are once set from subject one side, are focused on by mobile the 3rd lens set wherein.But the focusing lens group in zoom lens disclosed in patent documentation 2 ~ 4 is difficult to guarantee and realizes lightweight, be not enough to meet above-mentioned user's requirement.And patent documentation 5 proposition employing has the scheme that a slice bears the focusing lens group of eyeglass, the method alleviates focusing lens group weight, be conducive to self-focusing high speed or the miniaturization of lens barrel diameter etc., but, the focal range of each group of lens set is incorrect, be necessary to improve aberration compensation, in addition, the miniaturization of lens set is also abundant not.
About internal focus mode, separately have patent documentation 6 ~ 9 (JP specially permit No. 3716418, No. 3397686th, special permission, special permission No. 4401451, JP 2009-251112 publication) also disclose and there is first, second, third lens set that is positive and negative, negative refractive power arranging from subject side successively closer to subject one side than aperture, mobile the 3rd lens set wherein focuses on.
Zoom lens disclosed in its Patent Literature 9 is also bear eyeglass by a slice to form the 3rd lens set carried out and focus on, and alleviates the weight of the 3rd lens set, is conducive to the high speed focused on.
But large with the absolute value of the horizontal magnification focusing on the 3rd relevant lens set in the zoom lens that patent documentation 4 describes, thus focus on and need large amount of movement, the realization of zoom lens miniaturization is in a state of use to be further improved in addition.
Summary of the invention
In view of the foregoing, the object of the present invention is to provide a kind of high performance mini zoom lens being applicable to digital camera, the intensive setting of focusing lens group in this zoom lens, to focus on amount of movement little but can carry out high speed and focus on and have with great visual angle.
When the present invention also aims to develop wide-angle half angle of view be more than 36.8 degree, zoom ratio be about 1.5 ~ 5 times and also have can respective pixel more than 5,000,000 ~ resolution of the imaging apparatus of 1,000 ten thousand can zoom lens.
And then, the present invention also aims to provide the camera, massaging device and the carrying type information terminal device that possess above-mentioned zoom lens.
In order to achieve the above object, the invention provides following technical scheme.
The zoom lens that following the present invention (1) ~ (5) provide set gradually to imaging surface one side along optical axis from subject one side first lens set with positive refractive power, second lens set with negative refractive power, have negative refractive power the 3rd lens set, there is the 4th lens set of positive refractive power and there is the 5th lens set of positive refractive power, between the 3rd lens set and the 4th lens set, aperture is set.
From wide-angle to look in the distance zoom time, first lens set moves to subject one side, distance between first lens set and the second lens set increases, distance between second lens set and the 3rd lens set increases, distance between 3rd lens set and the 4th lens set reduces, and the distance between the 4th lens set and the 5th lens set reduces.
3rd lens set is born eyeglass with a slice and is formed, and carries out focusing by the movement of the 3rd lens set.
The feature of the zoom lens that the present invention (1) provides is, during focal length F3, the wide-angle of the focal length F2 of the second lens set, the 3rd lens set whole system focal length Fw and when looking in the distance the focal length Ft of whole system geometric mean Fm between satisfy the following conditional expression (1)
-3.0 < (F2-F3)/Fm <-0.5 formula (1)
Wherein,
The present invention (2) is the zoom lens according to the present invention (1), it is characterized in that, the horizontal magnification β of the 3rd lens set during wide-angle
3wwith the horizontal magnification β of the 3rd lens set when looking in the distance
3tsatisfy the following conditional expression respectively (2) and (3),
| β
3w| < 0.15 formula (2)
| β
3t| < 0.15 formula (3)
The present invention (3) is the zoom lens according to the present invention (1), it is characterized in that, emergent pupil distance Exp during wide-angle and satisfying the following conditional expression (4) between the maximum image height Y ' when looking in the distance,
1 < Exp/Y ' < 3 formula (4).
The present invention (4) is the zoom lens according to the present invention (1), it is characterized in that, when the maximum image height Y ' when looking in the distance and wide-angle whole system focal length Fw between satisfy the following conditional expression (5),
Y '/Fw > 0.75 formula (5).
The present invention (5) is the zoom lens according to the present invention (1), it is characterized in that, when looking in the distance when the focal length Ft of whole system and wide-angle whole system focal length Fw between satisfy the following conditional expression (6),
Ft/Fw > 1.5 formula (6).
The zoom lens that the present invention (6) provides sets gradually first lens set with positive refractive power from subject one side to imaging surface one side along optical axis, there is the second lens set of negative refractive power, there is the 3rd lens set of negative refractive power, and with the follow-up lens set that many groups or a group are formed, from wide-angle to look in the distance zoom time, distance between first lens set and the second lens set increases, distance between second lens set and the 3rd lens set increases, distance between 3rd lens set and follow-up lens set changes, focusing is carried out by the movement of the 3rd lens set, and then also there is following characteristics.
The feature of the zoom lens that the present invention (6) provides is, during synthesis focal length F23t, the wide-angle of the focal length F2 of the second lens set, the focal length F3 of the 3rd lens set, the second lens set when looking in the distance and the 3rd lens set whole system focal length Fw and when looking in the distance the focal length Ft of whole system geometric mean Fm between satisfy the following conditional expression (7) ~ (9)
2.0 < F3/F23t < 3.0 formula (7)
-2.5 < F2/Fm <-1.0 formula (8)
-1.4 < F3/Fm <-0.5 formula (9)
Wherein,
The zoom lens that the present invention (7) provides sets gradually first lens set with positive refractive power from subject one side to imaging surface one side along optical axis, there is the second lens set of negative refractive power, there is the 3rd lens set of negative refractive power, and with the follow-up lens set that many groups or a group are formed, from wide-angle to look in the distance zoom time, distance between first lens set and the second lens set increases, distance between second lens set and the 3rd lens set increases, distance between 3rd lens set and follow-up lens set changes, focusing is carried out by the movement of the 3rd lens set, it is characterized in that, bear eyeglass by a slice and form described 3rd arrangement of mirrors sheet, and, the focal length F2 of the second lens set, the focal length F3 of the 3rd lens set, the synthesis focal length F23t of the second lens set when looking in the distance and the 3rd lens set, during wide-angle whole system focal length Fw and when looking in the distance the focal length Ft of whole system geometric mean Fm between satisfy the following conditional expression (7) ~ (9),
2.0 < F3/F23t < 3.0 formula (7)
-2.5 < F2/Fm <-1.0 formula (8)
-1.4 < F3/Fm <-0.5 formula (9)
Wherein,
The present invention (8) is the zoom lens according to the present invention (6) or (7), it is characterized in that, the Ah's multiple forming the negative eyeglass of the 3rd lens set satisfies the following conditional expression (10),
Vd > 50 formula (10)
The present invention (9) is the zoom lens according to the present invention (6) or (7), it is characterized in that, follow-up lens set is the aperture that sets gradually to imaging surface one side from subject one side and has the 4th lens set of positive refractive power and have the 5th lens set of positive refractive power.
The present invention (10) is the zoom lens according to the present invention (6) or (7), it is characterized in that, when being configured to zoom, all lens set are moved.
The present invention (11) is the zoom lens according to the present invention (6) or (7), it is characterized in that, when the maximum image height Y ' when looking in the distance and wide-angle whole system focal length Fw between satisfy the following conditional expression (11),
Y '/Fw > 0.75 formula (11).
The present invention (12) is the zoom lens according to the present invention (6) or (7), it is characterized in that, when looking in the distance when the focal length Ft of whole system and wide-angle whole system focal length Fw between satisfy the following conditional expression (12)
Ft/Fw > 3.0 formula (12).
The present invention (13) is according to the zoom lens in (1), (6), (7) described in any one, it is characterized in that, this zoom lens can be used for massaging device, this massaging device reads the image of zoom lens shooting with imaging apparatus, and by electronic processing, electronic processing carried out to the data information-based through above-mentioned imaging apparatus, to compensate the distortion occurred in this image, this distortion is allowed to occur within the scope that electronic processing can compensate.
The present invention (14) provides a kind of camera, it is characterized in that, with the zoom lens described in any one in the present invention (1) ~ (13) as photographing optical system.
The present invention (16) provides a kind of massaging device, it is characterized in that, with the zoom lens described in any one in the present invention (1) ~ (13) as photographing optical system.
Camera and massaging device can have the function of the image reading zoom lens shooting with imaging apparatus, zoom lens machine now both can be the zoom lens of the present invention (1) ~ (12), also can be the zoom lens of the present invention (13).
That is, camera and massaging device both can be digital camera or video recorder, also can be silver cameras, and have as digital camera and read with imaging apparatus the zoom lens that the camera of function of the image of zoom lens shooting or massaging device are more suitable for adopting the invention described above (13).
The present invention (15) is the camera according to the present invention (14), it is characterized in that, has the function of the image reading zoom lens shooting with imaging apparatus.
The present invention (17) is the massaging device according to the present invention (16), it is characterized in that image imaging on the sensitive surface of imaging apparatus that zoom lens is taken.
The present invention (18) provides a kind of carrying type information terminal device, it is characterized in that with the photographing optical system of the zoom lens in the present invention (1) ~ (13) described in any one as camera-enabled portion.
The effect of the present invention (1) ~ (12) is first to achieve novel zoom lens.
The effect of wherein the present invention (1) ~ (5) is, carry out the 3rd lens set a slice focused on and bear eyeglass formation, lightweight, desired driving-energy when reducing focusing, and satisfy condition (2) and (3) optimize focusing sensitivity size, reduce and focus on desired amount of movement size, be conducive to the miniaturization of zoom lens when realizing automatic focus high speed and using state.
By meeting the terms and conditions formula of the present invention (3) ~ (5), when being conducive to provide wide-angle half angle of view be more than 36.8 degree, zoom ratio about 1.5 ~ 5 times, difference can fully be compensated and be had can respective pixel more than 5,000,000 ~ the high performance mini zoom lens of the resolution characteristic of the imaging apparatus of 1,000 ten thousand.
The effect of the present invention (6) ~ (12) is, focusing lens group arranges compact and amount of movement is little, reduce the desired driving-energy of mobile focusing lens group, when being conducive to provide wide-angle half angle of view be more than 36.8 degree, zoom ratio be about 1.5 ~ 5 times and also have can respective pixel more than 5,000,000 ~ resolution of the imaging apparatus of 1,000 ten thousand can high performance mini zoom lens.
The effect of the present invention (13) is, allows to occur with electronic processing to the distortion within the scope of the compensation data after imaging apparatus informationization, can to carry out extremely good compensation to the aberration beyond distortion.
And then, the effect of the present invention (14) ~ (19) is, the zoom lens of the present invention (1) ~ (13) is used as photographing optical system, be conducive to realizing little, mobile this focusing lens group institute of high zoom, focusing lens group amount of movement with great visual angle and want strength decline and automatic focus action high speed, can provide small-sized and massaging device and the carrying type information terminal device of high-definition picture can be obtained.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the mobile status for illustration of each arrangement of mirrors sheet when the structure of the zoom lens of the embodiment of the present invention 1 and zoom.
Fig. 2 is the schematic diagram of the mobile status for illustration of each arrangement of mirrors sheet when the structure of the zoom lens of the embodiment of the present invention 2 and zoom.
Fig. 3 is the schematic diagram of the mobile status for illustration of each arrangement of mirrors sheet when the structure of the zoom lens of the embodiment of the present invention 3 and zoom.
Fig. 4 is the schematic diagram of the mobile status for illustration of each arrangement of mirrors sheet when the structure of the zoom lens of the embodiment of the present invention 4 and zoom.
Fig. 5 is the schematic diagram of the mobile status for illustration of each arrangement of mirrors sheet when the structure of the zoom lens of the embodiment of the present invention 5 and zoom.
Fig. 6 is the zoom lens of embodiment 1 aberration curve figure when being positioned at wide-angle.
Fig. 7 is the zoom lens of embodiment 1 aberration curve figure when being positioned at middle focal length.
Fig. 8 is the aberration curve figure that the zoom lens of embodiment 1 is positioned at when looking in the distance.
Fig. 9 is the zoom lens of embodiment 2 aberration curve figure when being positioned at wide-angle.
Figure 10 is the zoom lens of embodiment 2 aberration curve figure when being positioned at middle focal length.
Figure 11 is the aberration curve figure that the zoom lens of embodiment 2 is positioned at when looking in the distance.
Figure 126 is the zoom lens of embodiment 3 aberration curve figure when being positioned at wide-angle.
Figure 13 is the zoom lens of embodiment 3 aberration curve figure when being positioned at middle focal length.
Figure 14 is the aberration curve figure that the zoom lens of embodiment 3 is positioned at when looking in the distance.
Figure 15 is the zoom lens of embodiment 4 aberration curve figure when being positioned at wide-angle.
Figure 16 is the zoom lens of embodiment 4 aberration curve figure when being positioned at middle focal length.
Figure 17 is the aberration curve figure that the zoom lens of embodiment 4 is positioned at when looking in the distance.
Figure 18 is the zoom lens of embodiment 5 aberration curve figure when being positioned at wide-angle.
Figure 19 is the zoom lens of embodiment 5 aberration curve figure when being positioned at middle focal length.
Figure 20 is the aberration curve figure that the zoom lens of embodiment 5 is positioned at when looking in the distance.
Figure 21 is the schematic diagram of the zoom lens optics structure of the embodiment of the present invention 6 and the zoom track of this zoom lens optics, and when wherein (a) is wide-angle, (b) when being mid-focal length, (c) be cross section along optical axis when looking in the distance.
Figure 22 is the schematic diagram of the zoom lens optics structure of the embodiment of the present invention 7 and the zoom track of this zoom lens optics, and when wherein (a) is wide-angle, (b) when being mid-focal length, (c) be cross section along optical axis when looking in the distance.
Figure 23 is the schematic diagram of the zoom lens optics structure of the embodiment of the present invention 8 and the zoom track of this zoom lens optics, and when wherein (a) is wide-angle, (b) when being mid-focal length, (c) look in the distance) time along the cross section of optical axis.
Figure 24 is the schematic diagram of the zoom lens optics structure of the embodiment of the present invention 9 and the zoom track of this zoom lens optics, and when wherein (a) is wide-angle, (b) when being mid-focal length, (c) look in the distance) time along the cross section of optical axis.
The aberration curve figure of the spherical aberration that Figure 25 occurs when being the zoom lens wide-angle of embodiment illustrated in fig. 21 6, astigmatism, distortion and comet aberration.
The aberration curve figure of the spherical aberration that Figure 26 occurs when being the zoom lens mid-focal length of embodiment illustrated in fig. 21 6, astigmatism, distortion and comet aberration.
Figure 27 be embodiment illustrated in fig. 21 6 zoom lens occur when looking in the distance spherical aberration, astigmatism, distortion and comet aberration aberration curve figure.
The aberration curve figure of the spherical aberration that Figure 28 occurs when being the zoom lens wide-angle of embodiment illustrated in fig. 22 7, astigmatism, distortion and comet aberration.
The aberration curve figure of the spherical aberration that Figure 29 occurs when being the zoom lens mid-focal length of embodiment illustrated in fig. 22 7, astigmatism, distortion and comet aberration.
Figure 30 be embodiment illustrated in fig. 22 7 zoom lens occur when looking in the distance spherical aberration, astigmatism, distortion and comet aberration aberration curve figure.
The aberration curve figure of the spherical aberration that Figure 31 occurs when being the zoom lens wide-angle of embodiment illustrated in fig. 23 8, astigmatism, distortion and comet aberration.
The aberration curve figure of the spherical aberration that Figure 32 occurs when being the zoom lens mid-focal length of embodiment illustrated in fig. 23 8, astigmatism, distortion and comet aberration.
Figure 33 be embodiment illustrated in fig. 23 8 zoom lens occur when looking in the distance spherical aberration, astigmatism, distortion and comet aberration aberration curve figure.
The aberration curve figure of the spherical aberration that Figure 34 occurs when being the zoom lens wide-angle of embodiment illustrated in fig. 24 9, astigmatism, distortion and comet aberration.
The aberration curve figure of the spherical aberration that Figure 35 occurs when being the zoom lens mid-focal length of embodiment illustrated in fig. 24 9, astigmatism, distortion and comet aberration.
Figure 36 be embodiment illustrated in fig. 24 9 zoom lens occur when looking in the distance spherical aberration, astigmatism, distortion and comet aberration aberration curve figure.
Figure 37 is the schematic diagram for illustration of compensating distortion by electronic processing.
Figure 38 is the oblique view of an example as the digital camera outward appearance of the massaging device of third embodiment of the invention, and this figure is figure when observing from subject direction.
Figure 39 is the oblique view observing the digital camera outward appearance shown in Figure 37 from photographer direction.
Figure 40 is the schematic diagram of the functional structure for illustration of Figure 37 shown device.
The explanation of mark
G1 first lens set, G2 second lens set, G3 the 3rd lens set, G4 the 4th lens set, G5 the 5th lens set, AD aperture, L1 first eyeglass, L2 second eyeglass, L3 the 3rd eyeglass, L4 the 4th eyeglass, L5 the 5th eyeglass, L6 the 6th eyeglass, L7 the 7th eyeglass, L8 the 8th eyeglass, L9 the 9th eyeglass, L10 the tenth eyeglass, L11 the 11 eyeglass, the parallel flats such as FM optical filter, 101 phtographic lenses, 102 optical finders, 103 exposure lamps, 104 shutter key, 105 phase machine hosts, 106 power switches, 107 liquid crystal display, 108 operating keys, 109 storage card slots, 110 zoom key, 111 central operation devices (CPU), 112 image processing apparatus, 113 photo detectors, 114 signal processing apparatus, 115 semiconductor memories, 116 communication cards etc.
Embodiment
Below based on embodiments of the present invention, describe zoom lens of the present invention, massaging device and carrying type information terminal device in detail with reference to accompanying drawing.
Zoom lens shown in Fig. 1 ~ Fig. 5, for illustration of the first embodiment, also shows the zoom lens of embodiment 1 ~ 5 simultaneously respectively, and the zoom lens shown in Figure 21 ~ Figure 24, for illustration of the second embodiment, also shows the zoom lens of embodiment 6 ~ 9 simultaneously.
In order to easy, in above-mentioned each figure, use same tag.Mark G1 represents the first lens set, and mark G2 represents the second lens set, and mark G3 represents the 3rd lens set, and mark G4 represents the 4th lens set, and mark G5 represents the 5th lens set, and mark AD represents aperture.The left of figure is subject one side, and right is imaging surface one side.
The eyeglass when figure being positioned at the top in following Fig. 1 ~ Fig. 5 and Figure 21 ~ Figure 24 all represents wide-angle is arranged, the eyeglass be positioned at when middle figure represents mid-focal length is arranged, the figure being positioned at bottom all represents that eyeglass when looking in the distance is arranged, from wide-angle to look in the distance zoom time zoom lens in each group of lens set move to state shown in bottom from the state shown in the top of figure according to arrow.
In addition, as shown in Figure 1, after being positioned at the 5th lens set and the optical element that the parallel flat of imaging surface one side represents refer to optics low pass filter and get rid of the cover glass (seal glass) of photo detector of the various optical filters or cmos image sensor and so on such as ultrared infrared fileter.
Flag F M in each figure is expressed as image planes.
Before detailed description specific embodiment, first the principle of embodiment of the present invention is described.
" the first embodiment "
Fig. 1 ~ Fig. 5 shows the first embodiment of the present invention.
Conditional (1) in the present invention represents relation between the focal length F2 of the second lens set and the focal length F3 of the 3rd lens set.Because the second lens set and the 3rd lens set all have negative refracting power, for this reason, focal length F2 and F3 is negative value.
If the higher limit of conditional (1) is greater than-0.5, the energy then carrying out the 3rd lens set haggled over reduces relatively, amount of movement during focusing increases, be an impediment to high-speed automatic focusing, or the energy of the second lens set increases, cause foozle sensitivity to increase, be unfavorable for eyeglass assembling property.
Otherwise, if the lower limit of conditional (1) is less than-3.0, then the energy of the 3rd lens set too increases, make to manufacture sensitivity to rise, be unfavorable for processing characteristics, or the energy of the second lens set reduces, degradedness between this second lens set and other lens set playing zoom effect is balanced, is difficult to carry out various aberration compensation.
The horizontal magnification scope of the 3rd lens set when conditional (2) and (3) represent wide-angle respectively and look in the distance.If the higher limit of conditional (2) and (3) exceeds this scope respectively, then focus on sensitivity and reduce, focus on desired amount of movement and increase, be unfavorable for miniaturization during zoom lens using state.
The so-called sensitivity that focuses on refers to that Focal Point Shift amount and focusing lens group (the 3rd lens set) focus on the ratio of desired amount of movement, focuses on the following formula of sensitivity FS and defines.
FS＝(1-β
F 2)×β
r 2
Wherein, β
frepresent the focusing lens group i.e. horizontal magnification of the 3rd lens set, β
rrepresent than all lens set i.e. synthesis multiplying power of four and five lens set of focusing lens group closer to imaging surface.
The parameter of above-mentioned conditional (1) ~ (3) preferably meets following narrower scope respectively,
-2.8 < (F2-F3)/Fm <-0.9 formula (1A)
| β
3w| < 0.11 formula (2A)
| β
3t| < 0.10 formula (3A).
Closer to imaging surface one side than aperture the 4th positive lens set is being set and is striving the 5th lens set will alleviate the zoom burden of the first ~ three lens set.
Conditional (4) defines the scope of emergent pupil distance when zoom lens realizes condition and the wide-angle of miniaturization.
If the higher limit of conditional (4) is more than 3, then whole optical system length will be caused to increase, or the eyeglass effective diameter caused closest to imaging surface one side will be increased, be unfavorable for zoom lens miniaturization.Otherwise if lower limit is less than 1, then around the incident angle of the light imaging surface of image height increases, and when utilizing imaging apparatus, easily causes the problems such as light-inletting quantity minimizing around.
Preferred above-mentioned conditional (4) meets following narrower scope,
1.4 < Exp/Y ' < 2.8 formulas (4A).
Based on the zoom lens of the first embodiment of the invention of said structure, from wide-angle to look in the distance zoom time, first lens set moves to subject one side, distance between first lens set and the second lens set increases, distance between second lens set and the 3rd lens set increases, distance between 3rd lens set and the 4th lens set reduces, and the distance between the 4th lens set and the 5th lens set reduces.Now, mobile all first ~ five lens set, make left and right lens set all play zoom effect, the burden of each group of lens set zoom effect all can obtain reduction, like this, is not only conducive to aberration compensation and processing characteristics, and effectively reduce the amount of movement of the first lens set, be conducive to miniaturization.
Conditional (5) is for limiting visual angle size, and the formula that satisfies condition (5) half angle of view contributed to when realizing wide-angle reaches more than 36.8 degree.
Conditional (6), for showing zoom ratio during zoom, reaches more than 1.5 times for realizing zoom ratio.Optimum condition formula (6) meets the following conditions further.
1.8 < Ft/Fw < 3.5 formula (6A).
Based on said structure, in first embodiment of the invention, the first lens set of zoom lens preferably sets gradually a slice and bears eyeglass and the positive eyeglass of a slice from subject one side.Be specially and from subject one side, set gradually convex surface to imaging surface one side, towards the negative crescent eyeglass of subject and towards the convex surface of subject, there is the positive eyeglass compared with deep camber, amount to two panels eyeglass, or after this adding the positive eyeglass of a slice again.
To improve zoom multiplying power, when especially will increase focal length when looking in the distance, need the synthesis multiplying power of increasing the second ~ five lens set, and the increase of synthesizing multiplying power is amplified making the aberration occurred in the first lens set by imaging surface.
For this reason, fully must reduce the aberration in the first lens set when improving zoom multiplying power, for the above reasons, preferential first lens set has said structure.
Preferably the second lens set is formed with three eyeglasses, and from subject one side, namely set gradually negative eyeglass, negative eyeglass and positive eyeglass, the curvature closest to the face in the face of imaging surface in the negative eyeglass of subject is larger.
The formation of negative eyeglass, negative eyeglass and positive eyeglass should be set gradually from subject one side, the principal point of the second lens set is moved to imaging surface one side, the shortening of whole optical system total length when contributing to looking in the distance.
About aperture, adopt aperture and zoom value has nothing to do, be the aperture of certain value, in order to simplify aperture device.But, if the aperture when aperture aperture be configured to when looking in the distance is greater than wide-angle, the change reducing F value will be contributed to.When needing to reduce to the light-inletting quantity reaching image planes, can stop opening be reduced, but preferably not change stop opening, but reduce light-inletting quantity by inserting ND optical filter etc., be conducive to preventing diffraction phenomena like this and cause resolution characteristic to decline.
Below embodiments of the invention 1 ~ 5 are described.
Zoom lens shown in Fig. 1 ~ Fig. 5 is respectively the zoom lens of embodiment 1 ~ 5.
Symbol below in all embodiments (1 ~ 9) is as follows.
F: the focal length of whole system
F:F value
ω: half angle of view
R: radius-of-curvature (aspheric surface is paraxial radius-of-curvature)
D: interplanar distance
Nd: refractive index
Vd: Abbe number
K: the aspheric surface constant of the cone
A
4: biquadratic asphericity coefficient
A
6: six power asphericity coefficients
A
8: eight power asphericity coefficient
A
10: ten power asphericity coefficients
A
12: ten quadratic power asphericity coefficients
A
14: ten biquadratic asphericity coefficients
The known following formula of aspheric surface represents, wherein, C is the inverse of paraxial radius-of-curvature and paraxial curvature, H be to the height of optical axis, K be the above-mentioned constant of the cone, A
4~ A
12for asphericity coefficient.
As shown in Fig. 1 ~ Fig. 5, the zoom lens of embodiment 1 ~ 5 sets gradually the first lens set G1 with positive refractive power from subject one side to imaging surface one side along optical axis, there is the second lens set G2 of negative refractive power, there is the 3rd lens set G3 of negative refractive power, there is the 4th lens set G4 of positive refractive power and there is the 5th lens set G5 of positive refractive power, between 3rd lens set G3 and the 4th lens set G4, aperture AD is set, from wide-angle to look in the distance zoom time, first lens set G1 moves to subject one side, distance between first lens set G1 and the second lens set G2 increases, distance between second lens set G2 and the 3rd lens set G3 increases, distance between 3rd lens set G3 and the 4th lens set G4 reduces, distance between 4th lens set G4 and the 5th lens set G5 reduces.
3rd lens set G3 is formed with 1 negative eyeglass, carries out focusing by the movement of the 3rd lens set G3.Aperture AD moves together with the 4th lens set G4.
Following embodiment 1 ~ embodiment 5 meets above-mentioned every zoom lens conditional (1) ~ (6).
< embodiment 1>
Fig. 1 shows the Zoom lens structure of embodiment 1.As shown in Figure 1, first lens set G1 of the focus-variable lens of embodiment 1 is configured to, and sets gradually convex surface towards the negative crescent eyeglass (the first eyeglass L1) of subject one side and face convex surface towards the just crescent eyeglass (the second eyeglass L2) of subject one side from subject one side.
Second lens set G2 is formed with three eyeglasses, namely set gradually from subject one side convex surface towards subject and the face of subject side be aspheric negative crescent eyeglass (the 3rd eyeglass L3), be positioned at the larger concave-concave of the curvature of the concave surface of imaging surface side and bear eyeglass (the 4th eyeglass L4) and be positioned at the larger positive eyeglass of biconvex (the 5th eyeglass L5) of the curvature of convex surface of subject side.
3rd lens set G3 is formed with a slice concave-concave eyeglass (the 6th eyeglass L6), and the curvature of the concave surface of subject one side of this eyeglass is larger.
4th lens set G4 be configured to from subject one side installation surface be aspheric biconvex eyeglass (the 7th eyeglass L7) to the comparatively large and face of this subject one side of the curvature of the convex surface of subject one side, towards the larger biconvex eyeglass (the 8th eyeglass L8) of the curvature of the convex surface of subject one side and convex surface towards the negative crescent eyeglass (the 9th eyeglass L9) of subject.
5th lens set G5 with the larger biconvex eyeglass (the tenth eyeglass L10) of the curvature of the convex surface towards subject one side and convex surface towards imaging surface and both sides are aspheric negative crescent eyeglass (the 11 eyeglass L11) is formed.
Represent glass types by glass manufacture enterprise name in the present embodiment 1, wherein, HOYA represents person of outstanding talent refined (HOYA) company, and OHARA represents little Yuan company.This expression is identical in each following embodiment.
Variation range in the present embodiment 1 during the zoom of the focal distance f of whole optical system, F value, half angle of view ω is respectively f=15.99 ~ 46.53, F=3.66 ~ 5.81, ω=41.8 ~ 17.08.
The data of embodiment 1 are as shown in table 1.
Table 1
| Face is numbered | r | d | nd | vd | θgF | Glass material | Manufacturer |
| R1 | 39.12273 | 1.2 | 1.92286 | 18.9 | 0.6495 | SNPH2 | OHARA |
| R2 | 23.28233 | 6.87824 | 1.883 | 40.76 | 0.5667 | SLAH58 | OHARA |
| R3 | 124.3126 | Variable DA | |||||
| R4＊ | 51.18576 | 0.9 | 1.9027 | 31 | 0.5943 | LLAH86 | OHARA |
| R5 | 9.80471 | 5.13832 | |||||
| R6 | -53.7786 | 0.9 | 1.883 | 40.76 | 0.5667 | SLAH58 | OHARA |
| R7 | 40.9171 | 0.1 | |||||
| R8 | 17.43533 | 3.08478 | 1.92286 | 18.9 | 0.6495 | SNPH2 | OHARA |
| R9 | -49.33344 | Variable DB | |||||
| R10 | -19.12351 | 0.9 | 1.883 | 40.76 | 0.5667 | SLAH58 | OHARA |
| R11 | 99.43789 | Variable DC | |||||
| R12 | ∞ | 0.4 | |||||
| R13＊ | 20.92318 | 1.78393 | 1.58913 | 61.15 | 0.5382 | LBAL35 | OHARA |
| R14 | -40.36773 | 0.1 | |||||
| R15 | 11.55704 | 4.21375 | 1.497 | 81.54 | 0.5375 | SFPL51 | OHARA |
| R16 | -39.61642 | 0.1 | |||||
| R17 | 223.6179 | 0.9 | 1.90366 | 31.32 | 0.5947 | TAFD25 | HOYA |
| R18 | 12.13573 | Variable DD | |||||
| R19 | 13.21477 | 4.80138 | 1.51823 | 58.9 | 0.5457 | SNSL3 | OHARA |
| R20 | -16.47821 | 3.08285 | |||||
| R21＊ | -10.3597 | 0.9 | 1.864 | 40.58 | 0.5669 | LLAH83 | OHARA |
| R22＊ | -25.28317 | Arbitrarily | |||||
| R23 | ∞ | 2.3 | 1.5168 | 64.2 | Various optical filter | ||
| R24 | ∞ | 1.5 | |||||
| R25 | ∞ | 0.7 | 1.5168 | 64.2 | Cover glass | ||
| R26 | ∞ |
In table 1, afterbody is added with the face numbering expression aspheric surface of mark *.
In table 1, the 4th, the 13rd, the 21st of attach mark " * " and the optical surface of the 22nd are aspheric surface, and the every aspheric surface parameter used in above-mentioned formula (13) is as follows.
4th: K=0, A4=1.056440E-06, A6=4.970200E-08, A8=-7.07385E-10, A10=5.361300E-12, A12=-1.57191E-14
13rd: K=0, A4=-7.78796E-05, A6=-2.65621E-07, A8=-1.50697E-09
21st: K=0, A4=3.625180E-05, A6=1.430340E-06, A8=-1.49906E-08
22nd: K=0, A4=1.042670E-04, A6=1.381650E-06, A8=-1.17092E-08
In above-mentioned data, such as-1.17092E-08 represents 1.17092 × 10
-8, this expression is identical in other embodiments following.
Variable range DA between first lens set G1 of embodiment 1 and the second lens set G2, the variable range DC between the variable interval DB between the second lens set G2 and aperture AD, aperture AD and the 3rd lens set G3 and the variable range DD between the 3rd lens set G3 and the 4th lens set G4, the variation that these parameters occur along with zoom is as shown in table 2.
Table 2
| Focal distance f | 15.99 | 27.14 | 46.53 |
| Variable DA | 0.80000 | 7.14187 | 15.11568 |
| Variable DB | 2.16319 | 2.4815 | 3.69545 |
| Variable DC | 10.23376 | 6.27306 | 3.7 |
| Variable DD | 4.47212 | 3.38477 | 2.42395 |
The zoom lens that Fig. 6 ~ Fig. 8 shows embodiment 1 successively wide-angle, mid-focal length, look in the distance time aberration diagram.Dotted line in spherical aberration curve map represents that the solid line in sine condition, astigmatism curve map represents the sagitta of arc, and dotted line represents meridian.D represents d line, and g represents g line.This expression is identical in other embodiments following.
< embodiment 2>
Fig. 2 shows the Zoom lens structure of embodiment 2.
In embodiment 2 except the 4th eyeglass L4 of the second lens set G2 be towards the 9th eyeglass L9 of the larger concave-concave eyeglass of the curvature of the concave surface of imaging surface one side, the 4th lens set G4 be that other are identical with embodiment 1 towards the larger concave-concave eyeglass of the curvature of the concave surface of imaging surface one side.
Variation range in the present embodiment 1 during the zoom of the focal distance f of whole optical system, F value, half angle of view ω is respectively f=18.65 ~ 54.3, F=3.62 ~ 5.83, ω=37.5 ~ 14.8.
The data of embodiment 2 are as shown in table 3.
Table 3
| Face is numbered | r | d | nd | vd | θgF | Glass material | Manufacturer |
| R1 | 34.87529 | 1.2 | 1.92286 | 18.9 | 0.6495 | SNPH2 | OHARA |
| R2 | 20.88097 | 6.4864 | 1.762 | 40.1 | 0.5765 | SLAM55 | OHARA |
| R3 | 274.4841 | Variable DA | |||||
| R4＊ | 83.17104 | 0.9 | 1.9027 | 31 | 0.5943 | LLAH86 | OHARA |
| R5 | 11.04146 | 4.70677 | |||||
| R6 | -71.07226 | 0.9 | 1.883 | 40.76 | 0.5667 | SLAH58 | OHARA |
| R7 | 35.27754 | 0.1 | |||||
| R8 | 17.30152 | 2.79533 | 1.92286 | 18.9 | 0.6495 | SNPH2 | OHARA |
| R9 | -47.57628 | Variable DB | |||||
| R10 | -16.6178 | 0.9 | 1.883 | 40.76 | 0.5667 | SLAH58 | OHARA |
| R11 | 392.0196 | Variable DC | |||||
| R12 | ∞ | 0.4 | |||||
| R13＊ | 25.28309 | 1.86904 | 1.58913 | 61.15 | 0.5382 | LBAL35 | OHARA |
| R14 | -33.48911 | 0.1 | |||||
| R15 | 11.13412 | 4.02771 | 1.497 | 81.54 | 0.5375 | SFPL51 | OHARA |
| R16 | -21.68179 | 0.1 | |||||
| R17 | -50.30385 | 0.9 | 1.90366 | 31.32 | 0.5947 | TAFD25 | HOYA |
| R18 | 12.84878 | Variable DD | |||||
| R19 | 14.1697 | 3.92313 | 1.54072 | 47.23 | 0.5651 | STIL2 | OHARA |
| R20 | -20.88484 | 6.7438 | |||||
| R21＊ | -9.13029 | 0.9 | 1.864 | 40.58 | 0.5669 | LLAH83 | OHARA |
| R22＊ | -17.25279 | Arbitrarily | |||||
| R23 | ∞ | 2.3 | 1.5168 | 64.2 | Various optical filter | ||
| R24 | ∞ | 1.5 | |||||
| R25 | ∞ | 0.7 | 1.5168 | 64.2 | Cover glass | ||
| R26 | ∞ |
In table 3, afterbody is added with the face numbering expression aspheric surface of mark *.
In table 3, the 4th, the 13rd, the 21st of attach mark " * " and the optical surface of the 22nd are aspheric surface, and the every aspheric surface parameter used in above-mentioned formula (13) is as follows.
4th: K=0, A4=-2.56108E-06, A6=1.044020E-07, A8=-1.4309E-09, A10=1.355110E-11, A12=-5.04361E-14
13rd: K=0, A4=-9.25137E-05, A6=-3.51547E-07, A8=-8.00052E-09
21st: K=0, A4=-2.51375E-04, A6=3.572660E-06, A8=1.359970E-08
22nd: K=0, A4=-1.75754E-04, A6=4.150840E-06, A8=-1.1655E-08
The variation that variable range DA between first lens set G1 of embodiment 2 and the second lens set G2, the variable range DC between the variable interval DB between the second lens set G2 and aperture AD, aperture AD and the 3rd lens set G3, the variable range DD between the 3rd lens set G3 and the 4th lens set G4, these parameters occur along with zoom is as shown in table 4.
Table 4
| Focal distance f | 18.65 | 31.67 | 54.30 |
| Variable DA | 0.80000 | 7.14675 | 14.74821 |
| Variable DB | 2.34612 | 2.74197 | 4.08503 |
| Variable DC | 9.71508 | 6.17599 | 3.7 |
| Variable DD | 3.39079 | 2.77585 | 2.23637 |
The zoom lens that Fig. 9 ~ Figure 11 shows embodiment 1 successively wide-angle, mid-focal length, look in the distance time aberration diagram.
< embodiment 3>
Variation range in the present embodiment 3 during the zoom of the focal distance f of whole optical system, F value, half angle of view ω is respectively f=16.15 ~ 38, F=3.63 ~ 5.86, ω=41.5 ~ 20.6.
The data of embodiment 3 are as shown in table 5.
Table 5
| Face is numbered | r | d | nd | vd | θgF | Glass material | Manufacturer |
| R1 | 47.76035 | 1.2 | 1.92286 | 18.9 | 0.6495 | SNPH2 | OHARA |
| R2 | 26.40714 | 4.14071 | 1.883 | 40.76 | 0.5667 | SLAH58 | OHARA |
| R3 | 157.9338 | Variable DA | |||||
| R4＊ | 317.0593 | 0.9 | 1.9027 | 31 | 0.5943 | LLAH86 | OHARA |
| R5 | 11.33016 | 4.09559 | |||||
| R6 | -32.4071 | 0.9 | 1.883 | 40.76 | 0.5667 | SLAH58 | OHARA |
| R7 | -147.884 | 0.1 | |||||
| R8 | 18.6336 | 2.62463 | 1.92286 | 18.9 | 0.6495 | SNPH2 | OHARA |
| R9 | -54.59411 | Variable DB | |||||
| R10 | -15.1769 | 0.9 | 1.883 | 40.76 | 0.5667 | SLAH58 | OHARA |
| R11 | 116.3303 | Variable DC | |||||
| R12 | ∞ | 0.4 | |||||
| R13＊ | 21.56915 | 1.81261 | 1.58913 | 61.15 | 0.5382 | LBAL35 | OHARA |
| R14 | -35.00674 | 0.1 | |||||
| R15 | 11.54805 | 2.26864 | 1.497 | 81.54 | 0.5375 | SFPL51 | OHARA |
| R16 | -62.39683 | 0.1 | |||||
| R17 | 84.20776 | 1.24552 | 1.90366 | 31.32 | 0.5947 | TAFD25 | HOYA |
| R18 | 15.65855 | Variable DD | |||||
| R19 | 19.02132 | 3.04876 | 1.497 | 81.54 | 0.5375 | SFPL51 | OHARA |
| R20 | -19.88286 | 3.40451 | |||||
| R21＊ | -20.70843 | 0.9 | 1.864 | 40.58 | 0.5669 | LLAH83 | OHARA |
| R22＊ | -930.2132 | Arbitrarily | |||||
| R23 | ∞ | 2.3 | 1.5168 | 64.2 | Various optical filter | ||
| R24 | ∞ | 1.5 | |||||
| R25 | ∞ | 0.7 | 1.5168 | 64.2 | Cover glass |
| R26 | ∞ |
In table 5, afterbody is added with the face numbering expression aspheric surface of mark *.
In table 5, the 4th, the 13rd, the 21st of attach mark " * " and the optical surface of the 22nd are aspheric surface, and the every aspheric surface parameter used in above-mentioned formula (13) is as follows.
4th: K=0, A4=2.777450E-05, A6=-3.99444E-08, A8=6.048460E-10, A10=1.095400E-12, A12=-2.48491E-14
13rd: K=0, A4=-9.36505E-05, A6=4.158310E-08, A8=-5.89151E-09
21st: K=0, A4=5.741240E-06, A6=-1.82504E-06, A8=4.009180E-09
22nd: K=0, A4=1.736520E-04, A6=-1.06638E-06, A8=2.185120E-08
The variation that variable range DA between first lens set G1 of embodiment 3 and the second lens set G2, the variable range DC between the variable interval DB between the second lens set G2 and aperture AD, aperture AD and the 3rd lens set G3, the variable range DD between the 3rd lens set G3 and the 4th lens set G4, these parameters occur along with zoom is as shown in table 6.
Table 6
| Focal distance f | 16.15 | 24.79 | 38.00 |
| Variable DA | 0.80000 | 5.90137 | 13.5357 |
| Variable DB | 2.34612 | 2.31144 | 3.32017 |
| Variable DC | 9.71508 | 5.58473 | 3.7 |
| Variable DD | 3.39079 | 1.89864 | 1 |
The zoom lens that Figure 12 ~ Figure 14 shows embodiment 3 successively wide-angle, mid-focal length, look in the distance time aberration diagram.
< embodiment 4>
Fig. 4 shows the Zoom lens structure of embodiment 4.
Except following two places in embodiment 4, namely the second eyeglass L2 of the first lens set G1 is be the face being positioned at imaging surface one side towards the 11 eyeglass L11 of the larger biconvex eyeglass of the curvature of the convex surface of imaging surface one side and the 5th lens set G5 is aspheric surface, different from the zoom lens of embodiment 1, other are identical with embodiment 1.
Variation range in the present embodiment 4 during the zoom of the focal distance f of whole optical system, F value, half angle of view ω is respectively f=16.15 ~ 31.66, F=3.62 ~ 5.84, ω=41.5 ~ 24.3.
The data of embodiment 4 are as shown in table 7.
Table 7
| Face is numbered | r | d | nd | vd | θgF | Glass material | Manufacturer |
| R1 | 83.13818 | 1.1 | 1.92286 | 18.9 | 0.6495 | SNPH2 | OHARA |
| R2 | 35.23645 | 3.06595 | 1.883 | 40.76 | 0.5667 | SLAH58 | OHARA |
| R3 | -1098.942 | Variable DA | |||||
| R4＊ | 72.91434 | 0.9 | 1.9027 | 31 | 0.5943 | LLAH86 | OHARA |
| R5 | 10.82705 | 3.43129 | |||||
| R6 | -37.55262 | 0.9 | 1.883 | 40.76 | 0.5667 | SLAH58 | OHARA |
| R7 | 93.3434 | 0.1 | |||||
| R8 | 16.89882 | 2.42724 | 1.92286 | 18.9 | 0.6495 | SNPH2 | OHARA |
| R9 | -52.03616 | Variable DB | |||||
| R10 | -14.10128 | 0.9 | 1.883 | 40.76 | 0.5667 | SLAH58 | OHARA |
| R11 | 87.39539 | Variable DC | |||||
| R12 | ∞ | 0.4 | |||||
| R13＊ | 26.39605 | 1.49002 | 1.7432 | 49.29 | 0.5529 | LLAM60 | OHARA |
| R14 | -75.65242 | 0.1 | |||||
| R15 | 11.88519 | 2.22222 | 1.497 | 81.54 | 0.5375 | SFPL51 | OHARA |
| R16 | -71.13735 | 0.1637 | |||||
| R17 | 242.9493 | 0.9 | 2.00069 | 25.46 | 0.6133 | TAFD40 | HOYA |
| R18 | 25.12199 | Variable DD | |||||
| R19 | 14.62481 | 3.33144 | 1.497 | 81.54 | 0.5375 | SFPL51 | OHARA |
| R20 | -20.51756 | 4.205 | |||||
| R21 | -13.433 | 0.9 | 1.864 | 40.58 | 0.5669 | LLAH83 | OHARA |
| R22＊ | -40：47867 | Arbitrarily | |||||
| R23 | ∞ | 2.3 | 1.5168 | 64.2 | Various optical filter | ||
| R24 | ∞ | 1.5 | |||||
| R25 | ∞ | 0.7 | 1.5168 | 64.2 | Cover glass | ||
| R26 | ∞ |
In table 7, afterbody is added with the face numbering expression aspheric surface of mark *.
In table 7, the 4th, the 13rd, the 21st of attach mark " * " and the optical surface of the 22nd are aspheric surface, and the every aspheric surface parameter used in above-mentioned formula (13) is as follows.
4th: K=0, A4=5.736250E-06, A6=1.541920E-07, A8=-1.54552E-09, A10=2.609640E-11, A12=-1.36118E-13
13rd: K=0, A4=-6.60531E-05, A6=-9.67387E-08, A8=-6.97485E-09
22nd: K=0, A4=2.216200E-04, A6=2.466620E-06, A8=-2.45507E-08, A10=6.485260E-10
Variable range DA between first lens set G1 of embodiment 4 and the second lens set G2, the variable range DC between the variable interval DB between the second lens set G2 and aperture AD, aperture AD and the 3rd lens set G3, the variable range DD between the 3rd lens set G3 and the 4th lens set G4, the variation that these parameters occur along with zoom is as shown in table 8.
Table 8
| Focal distance f | 16.15 | 22.65 | 31.66 |
| Variable DA | 0.80000 | 4.05898 | 9.84558 |
| Variable DB | 1.95868 | 2.01912 | 2.53384 |
| Variable DC | 6.90823 | 4.98661 | 3.7 |
| Variable DD | 2.51971 | 1.58386 | 1 |
The zoom lens that Figure 15 ~ Figure 17 shows embodiment 4 successively wide-angle, mid-focal length, look in the distance time aberration diagram.
< embodiment 5>
Fig. 5 shows the Zoom lens structure of embodiment 5.
The lens structure of embodiment 5 is identical with embodiment 1.
Variation range in the present embodiment 5 during the zoom of the focal distance f of whole optical system, F value, half angle of view ω is respectively f=15.99 ~ 46.56, F=3.65 ~ 5.85, ω=41.8 ~ 17.07.
The data of embodiment 5 are as shown in table 9.
Table 9
| Face is numbered | r | d | nd | vd | θgF | Glass material | Manufacturer |
| R1 | 40.67199 | 1.2 | 1.92286 | 18.9 | 0.6495 | SNPH2 | OHARA |
| R2 | 23.68628 | 5.77418 | 1.883 | 40.76 | 0.5667 | SLAH58 | OHARA |
| R3 | 131.1395 | Variable DA | |||||
| R4＊ | 59.03292 | 0.9 | 1.9027 | 31 | 0.5943 | LLAH86 | OHARA |
| R5 | 10.72146 | 5.25932 | |||||
| R6 | -64.05069 | 0.9 | 1.883 | 40.76 | 0.5667 | SLAH58 | OHARA |
| R7 | 43.98409 | 0.35569 | |||||
| R8 | 19.15126 | 3.19144 | 1.92286 | 18.9 | 0.6495 | SNPH2 | OHARA |
| R9 | -52.5303 | Variable DB | |||||
| R10 | -19.97082 | 0.9 | 1.883 | 40.76 | 0.5667 | SLAH58 | OHARA |
| R11 | 139.5677 | Variable DC | |||||
| R12 | ∞ | 0.4 | |||||
| R13＊ | 20.55518 | 1.74731 | 1.58913 | 61.15 | 0.5382 | LBAL35 | OHARA |
| R14 | -51.17341 | 0.1 | |||||
| R15 | 11.55689 | 4.22074 | 1.497 | 81.54 | 0.5375 | SFPL51 | OHARA |
| R16 | -41.75375 | 0.1 | |||||
| R17 | 166.2512 | 0.9 | 1.90366 | 31.32 | 0.5947 | TAFD25 | HOYA |
| R18 | 12.05572 | Variable DD | |||||
| R19 | 12.90449 | 4.87317 | 1.51823 | 58.9 | 0.5457 | SNSL3 | OHARA |
| R20 | -17.00145 | 3.31255 | |||||
| R21＊ | -10.01064 | 0.9 | 1.864 | 40.58 | 0.5669 | LLAH83 | OHARA |
| R22＊ | -26.34596 | Arbitrarily |
| R23 | ∞ | 2.3 | 1.5168 | 64.2 | Various optical filter | ||
| R24 | ∞ | 1.5 | |||||
| R25 | ∞ | 0.7 | 1.5168 | 64.2 | Cover glass | ||
| R26 | ∞ |
In table 9, afterbody is added with the face numbering expression aspheric surface of mark *.
In table 9, the 4th, the 13rd, the 21st of attach mark " * " and the optical surface of the 22nd are aspheric surface, and the every aspheric surface parameter used in above-mentioned formula (13) is as follows.
4th: K=0, A4=3.219740E-06, A6=3.603850E-08, A8=-5.10179E-10, A10=3.418800E-1, A12=-8.46642E-15
13rd: K=0, A4=-7.30888E-05, A6=-2.79226E-07, A8=-1.37626E-09
21st: K=0, A4=2.979630E-05, A6=1.179710E-06, A8=-6.349E-09
22nd: K=0, A4=9.580120E-05, A6=1.208010E-06, A8=-8.5897E-09
Variable range DA between first lens set G1 of embodiment 5 and the second lens set G2, the variable range DC between the variable interval DB between the second lens set G2 and aperture AD, aperture AD and the 3rd lens set G3, the variable range DD between the 3rd lens set G3 and the 4th lens set G4, the variation that these parameters occur along with zoom is as shown in table 10.
Table 10
| Focal length | 15.99 | 27.15 | 46.56 |
| Variable DA | 0.80000 | 6.30035 | 15.1167 |
| Variable DB | 2.42693 | 2.6565 | 4.26083 |
| Variable DC | 11.25392 | 6.56736 | 3.7 |
| Variable DD | 4.5809 | 3.73281 | 2.84179 |
The zoom lens that Figure 18 ~ Figure 20 shows embodiment 5 successively wide-angle, mid-focal length, look in the distance time aberration diagram.
In above-described embodiment 1 ~ 5, the parameter value of terms and conditions formula is as shown in table 11.
Table 11
| Embodiment 1 | Real executes example 2 | Real executes example 3 | Real executes example 4 | Real executes example 5 | |
| Conditional (1) | -0.942 | -1.047 | -2.747 | -1.978 | -1.180 |
| Conditional (2) | 0.107 | 0.065 | 0.021 | 0.078 | 0.087 |
| Conditional (3) | 0.061 | 0.004 | -0.002 | 0.069 | 0.041 |
| Conditional (4) | 2.217 | 2.101 | 2.100 | 2.103 | 2.102 |
| Conditional (5) | 2.910 | 2.911 | 2.353 | 1.961 | 2.912 |
| Conditional (6) | 0.894 | 0.767 | 0.886 | 0.886 | 0.894 |
As known from Table 11, the zoom lens of embodiment 1 ~ 5 all satisfies condition formula (1) ~ (6).
As mentioned above, each arrangement of mirrors chip architecture in embodiment 1 ~ 5 is and is formed the first lens set G1 with negative positive two panels eyeglass, is formed the second lens set G2 with negative positive three eyeglasses, bears eyeglass formed the 3rd lens set G3, formed the 4th lens set G4 with positive and negative three eyeglasses, formed the 5th lens set G5 with positive and negative two panels eyeglass with a slice.
From wide-angle to look in the distance zoom time, all significantly move to subject one side with the first lens set G1 in the zoom lens of embodiment 1 ~ 5, by the height of the light of the first lens set G1 during in order to reduce wide-angle, suppress the maximization of the first lens set occurred because of wide angle.
" the second embodiment "
Figure 21 ~ Figure 24 shows the second embodiment of the present invention.In second embodiment of the invention, zoom lens sets gradually the first lens set G1 with positive refractive power to imaging surface one side from subject one side, there is the second lens set G2 of negative refractive power, there is the 3rd lens set G3 of negative refractive power, there is the 4th lens set G4 of positive refractive power, and there is the 5th lens set G5 of positive refractive power, from wide-angle to look in the distance zoom time, all lens set are moved, wherein, first pieces group G1, 4th lens set G4 and the 5th lens set G5 moves to subject one side all the time, second lens set G2 and the 3rd lens set G3 along the arching trajectory protruded to imaging surface one side or wherein a part of track move, distance between first lens set G1 and the second lens set G2 increases, distance between second lens set G2 and the 3rd lens set G3 increases, distance between 3rd lens set G3 and the 4th lens set G4 reduces, distance between 4th lens set G4 and the 5th lens set G5 reduces, aperture AD and the 4th lens set G4 one is mobile.
First lens set G1 is configured to set gradually convex surface from subject one side towards the negative crescent eyeglass i.e. first eyeglass L1 of subject and convex surface towards the just crescent eyeglass i.e. second eyeglass L2 of subject, amounts to two panels eyeglass.Wherein the first eyeglass L1 and the second eyeglass L2 be close together and bond form as one in conjunction with eyeglass.
Second lens set G2 is formed with three eyeglasses, and the comparatively large and face of eyeglass both sides of the curvature of the negative crescent eyeglass i.e. three eyeglass L3 of the convex surface namely set gradually from subject one side towards subject, the concave surface in the face of imaging surface is aspheric concave-concave eyeglass i.e. the 4th eyeglass L4 and in the face of larger biconvex eyeglass i.e. the 5th eyeglass L5 of the curvature of the convex surface of imaging surface.
3rd lens set G3 is formed with the larger concave-concave eyeglass of the curvature of concave surface in the face of subject one side and the 6th eyeglass L6.
4th lens set G4 is formed with three eyeglasses, namely sets gradually from subject one side in the face of becoming the curvature of the convex surface of subject comparatively large and the face of eyeglass both sides is aspheric biconvex eyeglass i.e. the 7th eyeglass L7, towards larger biconvex eyeglass i.e. the 8th eyeglass L8 of the curvature of the convex surface of subject and in the face of larger concave-concave eyeglass i.e. the 9th eyeglass of the curvature of the concave surface of imaging surface.Wherein the 8th eyeglass L8 and the 9th eyeglass L9 be close together and bond form as one in conjunction with eyeglass.
With the curvature of the convex surface towards imaging surface, comparatively large and eyeglass both sides are aspheric biconvex eyeglass i.e. the tenth eyeglass L10 and convex surface and are formed towards negative crescent eyeglass i.e. the 11 eyeglass L11 of imaging surface 5th lens set G5.
In the zoom lens of the second embodiment of the invention based on said structure, during synthesis focal length F23t, the wide-angle of the focal length F2 of the second lens set, the focal length F3 of the 3rd lens set, the second lens set when looking in the distance and the 3rd lens set whole system focal length Fw and when looking in the distance the focal length Ft of whole system geometric mean Fm between satisfy the following conditional expression (7) ~ (9)
2.0 < F3/F23t < 3.0 formula (7)
-2.5 < F2/Fm <-1.0 formula (8)
-1.4 < F3/Fm <-0.5 formula (9)
Wherein,
Above-mentioned conditional (7) ~ (9) are intended to obtain appropriate balance between the focal length F2 and the focal length F3 of the 3rd lens set of the second lens set.Zoom effect is played primarily of the second lens set and the 3rd lens set in zoom lens of the present invention, for this reason, when needs realize zoom lens miniaturization, be necessary the energy reversal between optimization second lens set and the 3rd lens set, 3rd lens set, except playing zoom effect, also has both focussing force.
Conditional (7) represents scope when to keep appropriate balance between the second lens set and the 3rd lens set.If the higher limit of this formula (7) is more than 3.0, then the energy of the 3rd lens set is too small, and during focusing, amount of movement increases, or the second lens set energy increases, and causes and manufactures sensitivity rising, be unfavorable for processing characteristics.On the contrary, if lower limit is less than 2.0, then not only the 3rd lens set energy is excessive, manufacture sensitivity and rise, be unfavorable for processing characteristics, and the second lens set energy declines, and out of trim between other lens set of participation zoom, is difficult to carry out various aberration compensation.
Conditional (8) and (9) are respectively the second lens set and the 3rd lens set due scope separately.If conditional (8) and (9) higher limit exceed-1.0 and-0.5 respectively, then respective lens set energy increases, concerning the second lens set, zoom scope diminishes, concerning the 3rd lens set, displacement during focusing reduces, although be conducive to miniaturization, but foozle sensitivity rises, and is unfavorable for processing characteristics.On the contrary, if conditional (8) and (9) respective lower limit are less than-2.5 and-1.4 respectively, although then will under foozle sensitivity, be conducive to processing, but not only zoom and displacement when focusing on become large, and increase the burden of other lens set, and for this reason can out of trim, be difficult to carry out various aberration compensation.
For this reason, following conditional (7A), (8A), (9A) is preferably met further.
2.2 < F3/F23t < 2.8 formula (7A)
-2.4 < F2/Fm <-1.2 formula (8A)
-1.2 < F3/Fm <-0.8 formula (9A)
In order to alleviate focusing lens group weight further, the 3rd lens set of preferred zoom lens is born eyeglass with a slice and is formed, and is conducive to focusing on high speed and reducing noise.
In order to improve performance, the Abbe number of the negative eyeglass of the 3rd lens set of preferred zoom lens satisfies condition formula (10),
Vd > 50 formula (10)
3rd lens set a slice eyeglass is formed, and this eyeglass adopts low dispersing glass, to suppress the generation of various aberration, reduces other lens set burden, is conducive to aberration compensation.
Preferably the Abbe number v d of the 3rd lens set meets following conditional (10A) further.
V d > 60 formula (10A)
In order to improve performance further, the follow-up lens set of preferred zoom lens be set gradually to imaging surface one side from subject one side aperture, there is the 4th lens set of positive refractive power and there is the 5th lens set of positive refractive power.
Increase the zoom burden that follow-up lens set can reduce front lens set, increase degree of freedom, be therefore conducive to aberration compensation and processing characteristics, but need to weigh house get with optical system miniaturization, at this, the 4th lens set and the 5th lens set that arrange positive refractive power are appropriate.
In order to improve performance further, preferred zoom is that all lens set are all moved.
All lens set all to work the zoom burden that can reduce each arrangement of mirrors sheet to zoom, not only favourable on aberration compensation and processing characteristics, and effectively can reduce the amount of movement of the first lens set, are conducive to miniaturization.
When maximum image height Y ' when looking in the distance of the zoom lens of present embodiment and wide-angle whole system focal length Fw between satisfy the following conditional expression (11),
Y '/Fw > 0.75 formula (11).
Conditional (11) is for display view angle, and half angle of view when obtaining wide-angle reaches more than 36.8 degree, and eyeglass arranges compact zoom lens.
When the focal length Ft of zoom lens whole system when looking in the distance of present embodiment and wide-angle whole system focal length Fw between satisfy the following conditional expression (12),
Ft/Fw > 3.0 formula (12).
Conditional (12), for limiting zoom ratio, obtains zoom ratio and is more than 3 times and the high-performance variable zoom lens that eyeglass arrangement row establishes when wide-angle.
And then preferably satisfy the following conditional expression (12A),
3.0 < Ft/Fw > 5.0 formula (12A).
About aperture, can adopt and to have nothing to do with aperture zoom and to keep certain aperture in order to simplify aperture device.But, if the aperture when aperture aperture be configured to when looking in the distance is greater than wide-angle, the change reducing F value will be contributed to.When needing to reduce to the light-inletting quantity reaching image planes, can stop opening be reduced, but preferably not change stop opening, but reduce light-inletting quantity by inserting ND optical filter etc., be conducive to preventing diffraction phenomena like this and cause resolution characteristic to decline.
< embodiment 6>
Figure 21 is the schematic diagram of the zoom lens optics structure of the embodiment of the present invention 6 and the zoom track of this zoom lens optics, and when wherein (a) is wide-angle, (b) when being mid-focal length, (c) be cross section along optical axis when looking in the distance.As shown in figure 21, in zoom lens along optical axis from the left side of subject one side and figure, set gradually the first lens set G 1 with positive refractive power, there is the second lens set G2 of negative refractive power, there is the 3rd lens set G3 of negative refractive power, there is the 4th lens set G4 of positive refractive power, and there is the 5th lens set G5 of positive refractive power, aperture AD is provided with between second lens set G3 and the 3rd lens set G4, from wide-angle to look in the distance zoom time, all lens set move, wherein, first pieces group G1, 4th lens set G4 and the 5th lens set G5 moves to subject one side all the time, second lens set G2 and the 3rd lens set G3 along the arching trajectory protruded to imaging surface one side or wherein a part of track move, distance between first lens set G1 and the second lens set G2 increases, distance between second lens set G2 and the 3rd lens set G3 increases, distance between 3rd lens set G3 and the 4th lens set G4 reduces, distance between 4th lens set G4 and the 5th lens set G5 reduces, aperture AD and the 4th lens set G4 one is mobile.
First lens set G1 is configured to set gradually convex surface from subject one side towards the negative crescent eyeglass i.e. first eyeglass L1 of subject and convex surface towards the just crescent eyeglass i.e. second eyeglass L2 of subject, amounts to two panels eyeglass.This first eyeglass L1 and the second eyeglass L2 be close together and bond form as one in conjunction with eyeglass.
Second lens set G2 is formed with three eyeglasses, and the comparatively large and face of eyeglass both sides of the curvature of the negative crescent eyeglass i.e. three eyeglass L3 of the convex surface namely set gradually from subject one side towards subject, the concave surface in the face of imaging surface is aspheric concave-concave eyeglass i.e. the 4th eyeglass L4 and in the face of larger biconvex eyeglass i.e. the 5th eyeglass of the curvature of the convex surface of imaging surface.
3rd lens set G3 is formed with concave-concave eyeglass i.e. the 6th eyeglass L6 that the curvature of the concave surface in the face of subject one side is larger.
4th lens set G4 is formed with three eyeglasses, and the comparatively large and face of eyeglass both sides of the curvature of the convex surface in the face of subject namely set gradually from subject one side is aspheric biconvex eyeglass i.e. the 7th eyeglass L7, towards larger biconvex eyeglass i.e. the 8th eyeglass L8 of the curvature of the convex surface of subject and in the face of larger concave-concave eyeglass i.e. the 9th eyeglass L9 of the curvature of the concave surface of imaging surface.Wherein the 8th eyeglass L8 and the 9th eyeglass L9 be close together and bond form as one in conjunction with eyeglass.
With the curvature of the convex surface towards imaging surface, comparatively large and eyeglass both sides are aspheric biconvex eyeglass i.e. the tenth eyeglass L10 and convex surface and are formed towards negative crescent eyeglass i.e. the 11 eyeglass L11 of imaging surface 5th lens set G5.
First lens set G1 ~ the 4th lens set G4 is subject to the supports such as support frame separately, and when zoom etc. each arrangement of mirrors sheet body action respectively, aperture AD is independent of the action of each arrangement of mirrors sheet.The mark of the optical mirror plane of each eyeglass is also show in Figure 21 ~ 24.About the mark in Figure 21 ~ 24, for the object simplified, every embodiment all adopts identical mark, but this does not represent that every embodiment formation is identical.
Below show the concrete numerical value of the zoom lens of each embodiment of present embodiment.Maximum image height in the present embodiment is 14.3.But in order to compensate the distortion occurred in image with distortion compensation image procossing when wide-angle, the distortion born in advance, considers distortion size at this, setting most elephant height is 12.3mm.
That is, in the zoom lens of following examples 6 ~ 9, the image procossing of above-mentioned distortion is carried out with aberration for compensation.The distortion in fat shape is there is when being specially the wide-angle in the zoom lens of embodiment 6 ~ 9.
On the other hand, mid-focal length and neighbouring and when looking in the distance, being suppressed of distortion.Therefore, to compensate distortion by electronic processing, then need the image pickup scope forming fat shape when wide-angle, and in mid-focal length or form the camera coverage of rectangle when looking in the distance.Then, change effective image pickup scope with image procossing, make the image pickup scope after compensating reach image height and be 14.3mm and the rectangular image information reduced that distorts.For this reason, in following examples 6 ~ 9, act as regent the paraxial image height during wide-angle 12.3mm, little of mid-focal length or image height when looking in the distance.Its result, the aberration in each embodiment all obtains good compensation, corresponding can have more than 5,000,000 ~ the resolution characteristic of the photo detector of 1,000 ten thousand pixels.From following embodiment 6 ~ 9, utilize the structure of zoom lens of the present invention, fully can realize miniaturization and guarantee to obtain good image shape energy.
Table 12 shows the optical characteristics of each optical element in embodiment 6.
Represent glass types by glass manufacture enterprise name in embodiment, wherein, HOYA represents person of outstanding talent refined (HOYA) company, and OHARA represents little Yuan company.This expression is identical in each following embodiment.
Variation range in the present embodiment 6 during the zoom of the focal distance f of whole optical system, F value, half angle of view ω is respectively f=16.15 ~ 53.85, F=3.65 ~ 5.87, ω=41.5 ~ 14.87.
Table 12
| Face is numbered | r | d | nd | vd | θgF | Glass material | Manufacturer |
| R1 | 32.15521 | 1.2 | 1.84666 | 23.78 | 0.6205 | STIH53 | OHARA |
| R2 | 22.29223 | 5.20908 | 1.741 | 52.64 | 0.5467 | SLAL61 | OHARA |
| R3 | 141.0522 | Variable DA | |||||
| R4 | 226.2625 | 0.90001 | 2.00069 | 25.46 | 0.6133 | TAFD40 | HOYA |
| R5 | 11.3979 | 4.21149 | |||||
| R6* | -95.51088 | 1.88618 | 1.8086 | 40.42 | 0.5691 | LLAH84 | OHARA |
| R7* | 29.99998 | 1.5949 | |||||
| R8 | 25.41606 | 3.71791 | 1.84666 | 23.78 | 0.6205 | STIH53 | OHARA |
| R9 | -24.21009 | Variable DB | |||||
| R10 | -18.84443 | 0.8 | 1.603 | 65.44 | 0.5401 | SPHM53 | OHARA |
| R11 | 139.8617 | Variable DC | |||||
| R12 | ∞ | 1.45 | |||||
| R13* | 15.30486 | 5.13996 | 1.48749 | 70.24 | 0.5300 | SFSL5 | OHARA |
| R14* | -21.16253 | 0.10033 | |||||
| R15 | 13.91577 | 3.97268 | 1.53172 | 48.84 | 0.5631 | STIL6 | OHARA |
| R16 | -22.57576 | 0.8 | 1.834 | 37.16 | 0.5776 | SLAH60 | OHARA |
| R17 | 12.48307 | Variable DD | |||||
| R18* | 22.67726 | 4.77012 | 1.48749 | 70.24 | 0.5300 | SFSL5 | OHARA |
| R19* | -12.28485 | 0.96674 | |||||
| R20 | -20.62258 | 0.91905 | 1.90366 | 31.32 | 0.5947 | TAFD25 | HOYA |
| R21 | -282.5977 | Arbitrarily | |||||
| R22 | ∞ | 2.31 | 1.5168 | 64.2 | Various optical filter | ||
| R23 | ∞ | 1.5 |
| R24 | ∞ | 0.7 | 1.5168 | 64.2 | Cover glass | ||
| R25 | ∞ | B.F. |
In table 12, afterbody is added with the face numbering expression aspheric surface of mark *.
In table 12, the 6th, the 7th, the 13rd, the 14th, the 18th of attach mark " * " and the optical surface of the 19th are aspheric surface, and the every aspheric surface parameter used in above-mentioned formula (13) is as follows.
6th: K=0, A4=-4.574070E-05, A6=2.025770E-07, A8=4.226600E-09, A10=-1.133690E-10, A12=1.002020E-12
7th: K=0, A4=-6.053710E-05, A6=4.194320E-07, A8=-5.241680E-09, A10=4.414260E-11
13rd: K=0, A4=-3.767330E-05, A6=-1.265330E-06, A8=2.299780E-08, A10=-5.701440E-10
14th: K=0, A4=2.657950E-05, A6=-1.333820E-06, A8=2.149520E-08, A10=-5.004250E-10
18th: K=1.150062, A4=1.119530E-05, A6=-7.160660E-07, A8=1.145640E-08, A10=1.598030E-10
19th: K=-2.234150E-01, A4=9.627960E-05, A6=8.898440E-08, A8=-1.344540E-09, A10=1.925800E-10, A12=1.432410E-12
The variation that variable range DA between first lens set G1 of embodiment 6 and the second lens set G2, the variable range DC between the variable interval DB between the second lens set G2 and aperture AD, aperture AD and the 3rd lens set G3, the variable range DD between the 3rd lens set G3 and the 4th lens set G4 occur along with zoom is as shown in table 13.
Table 13
| Focal length | 16.15 | 29.49 | 53.85 |
| Variable DA | 0.64445 | 5.67289 | 15.61308 |
| Variable DB | 2.26354 | 2.82469 | 3.7246 |
| Variable DC | 16.68541 | 7.63858 | 2.75001 |
| Variable DD | 3.63001 | 1.98001 | 1.78659 |
The zoom lens that Figure 25 ~ Figure 27 shows embodiment 6 successively wide-angle, mid-focal length, look in the distance time aberration diagram.
The each entry value of above-described embodiment 6 in conditional (7) ~ (12) is as shown in the table.
Table 14
| Embodiment 6 | |
| Conditional (7) | 2.279 |
| Conditional (8) | -2.301 |
| Conditional (9) | -0.932 |
| Conditional (10) | 65.44 |
| Conditional (11) | 0.886 |
| Conditional (12) | 3.34 |
As known from Table 14, the zoom lens of embodiment 6 satisfies condition formula (7) ~ (12).
< embodiment 7>
Figure 22 is the schematic diagram of the zoom lens optics structure of embodiment 7 in second embodiment of the invention and the zoom track of this zoom lens optics, and when wherein (a) is wide-angle, (b) when being mid-focal length, (c) look in the distance) time along the cross section of optical axis.As shown in figure 22, in zoom lens along optical axis from the left side of subject one side and figure, set gradually the first lens set G1 with positive refractive power, there is the second lens set G2 of negative refractive power, there is the 3rd lens set G3 of negative refractive power, there is the 4th lens set G4 of positive refractive power, and there is the 5th lens set G5 of positive refractive power, aperture AD is provided with between second lens set G3 and the 3rd lens set G4, from wide-angle to look in the distance zoom time, all lens set move, wherein, first pieces group G1, 4th lens set G4 and the 5th lens set G5 moves to subject one side all the time, second lens set G2 and the 3rd lens set G3 along the arching trajectory protruded to imaging surface one side or wherein a part of track move, distance between first lens set G1 and the second lens set G2 increases, distance between second lens set G2 and the 3rd lens set G3 increases, distance between 3rd lens set G3 and the 4th lens set G4 reduces, distance between 4th lens set G4 and the 5th lens set G5 reduces, aperture AD and the 4th lens set G4 one is mobile.
First lens set G1 is configured to set gradually convex surface from subject one side towards the negative crescent eyeglass i.e. first eyeglass L1 of subject and convex surface towards the just crescent eyeglass i.e. second eyeglass L2 of subject, amounts to two panels eyeglass.This first eyeglass L1 and the second eyeglass L2 be close together and bond form as one in conjunction with eyeglass.
Second lens set G2 is formed with three eyeglasses, and the comparatively large and face of eyeglass both sides of the curvature of the negative crescent eyeglass i.e. three eyeglass L3 of the convex surface namely set gradually from subject one side towards subject, the concave surface in the face of subject is aspheric concave-concave eyeglass i.e. the 4th eyeglass L4 and equal biconvex eyeglass i.e. the 5th eyeglass L5 of both sides curvature mirror radius.
3rd lens set G3 is formed with concave-concave eyeglass i.e. the 6th eyeglass L6 that the curvature of the concave surface in the face of subject one side is larger.
4th lens set G4 is formed with three eyeglasses, and the comparatively large and face of eyeglass both sides of the curvature of the convex surface in the face of subject namely set gradually from subject one side is aspheric biconvex eyeglass i.e. the 7th eyeglass L7, towards larger biconvex eyeglass i.e. the 8th eyeglass L8 of the curvature of the convex surface of subject and in the face of larger concave-concave eyeglass i.e. the 9th eyeglass L9 of the curvature of the concave surface of imaging surface.Wherein the 8th eyeglass L8 and the 9th eyeglass L9 be close together and bond form as one in conjunction with eyeglass.
With the curvature of the convex surface towards imaging surface, comparatively large and eyeglass both sides are aspheric biconvex eyeglass i.e. the tenth eyeglass L10 and convex surface and are formed towards negative crescent eyeglass i.e. the 11 eyeglass L11 of imaging surface 5th lens set G5.
There are following two places in the lens structure of the present embodiment different from embodiment 6, namely the 4th eyeglass L4 of the second lens set G2 be the concave surface of subject side curvature comparatively greatly and the face of imaging surface side be aspheric concave-concave eyeglass, the 5th eyeglass L5 is the biconvex eyeglass that both sides curvature mirror radius is equal.
Below show the concrete numerical value of the zoom lens of the present embodiment.Maximum image height in the present embodiment is 14.3mm.But in order to compensate the distortion occurred in image with distortion compensation image procossing when wide-angle, the distortion born in advance, considers distortion size at this, setting most elephant height is 12.3mm.
Its result, as shown in Figure 28 ~ 30, the aberration in the present embodiment 7 all obtains good compensation, corresponding can have more than 5,000,000 ~ the resolution characteristic of the photo detector of 1,000 ten thousand pixels.From the present embodiment 7, utilize the structure of zoom lens of the present invention, fully can realize miniaturization and guarantee to obtain good image shape energy.
Table 15 shows the optical characteristics of each optical element in embodiment 7.
Represent glass types by glass manufacture enterprise name in the present embodiment 7, wherein, HOYA represents person of outstanding talent refined (HOYA) company, and OHARA represents little Yuan company.This expression is identical in each following embodiment.
Variation range in the present embodiment 7 during the zoom of the focal distance f of whole optical system, F value, half angle of view ω is respectively f=16.15 ~ 53.9, F=3.68 ~ 5.85, ω=41.5 ~ 14.87.
Table 15
| Face is numbered | r | d | nd | vd | θgF | Glass material | Manufacturer |
| R1 | 41.92345 | 1.20001 | 1.84666 | 23.78 | 0.6205 | STIH53 | OHARA |
| R2 | 26.39469 | 6.20704 | 1.7725 | 49.6 | 0.5520 | SLAH66 | OHARA |
| R3 | 190.2691 | Variable DA | |||||
| R4 | 371.3578 | 0.9 | 1.90366 | 31.32 | 0.5947 | TAFD25 | HOYA |
| R5 | 10.59186 | 4.6906 |
| R6* | -53.56537 | 1.84683 | 1.8086 | 40.42 | 0.5691 | LLAH84 | OHARA |
| R7* | 109.9411 | 0.26477 | |||||
| R8 | 29.62053 | 3.29747 | 1.80809 | 22.76 | 0.6307 | SNPH1 | OHARA |
| R9 | -29.62053 | Variable DB | |||||
| R10 | -17.32548 | 0.8 | 1.48749 | 70.24 | 0.5300 | SFSL5 | OHARA |
| R11 | 426.8727 | Variable DC | |||||
| R12 | ∞ | 1.45 | |||||
| R13* | 15.42745 | 6.8 | 1.48749 | 70.24 | 0.5300 | SFSL5 | OHARA |
| R14* | -19.80443 | 0.1 | |||||
| R15 | 21.51894 | 3.24108 | 1.53172 | 48.84 | 0.5631 | STIL6 | OHARA |
| R16 | -32.1677 | 0.8 | 1.834 | 37.16 | 0.5776 | SLAH60 | OHARA |
| R17 | 17.02535 | Variable DD | |||||
| R18* | 29.38099 | 4.78296 | 1.48749 | 70.24 | 0.5300 | SFSL5 | OHARA |
| R19* | -12.77332 | 1 | |||||
| R20 | -18.24904 | 0.80001 | 1.801 | 34.97 | 0.5864 | SLAM66 | OHARA |
| R21 | -93.27733 | Arbitrarily | |||||
| R22 | ∞ | 2.31 | 1.5168 | 64.2 | Various optical filter | ||
| R23 | ∞ | 1.5 | |||||
| R24 | ∞ | 0.7 | 1.5168 | 64.2 | Cover glass | ||
| R25 | ∞ | B.F. |
In table 15, afterbody is added with the face numbering expression aspheric surface of mark *.
In table 15, the 6th, the 7th, the 13rd, the 14th, the 18th of attach mark " * " and the optical surface of the 19th are aspheric surface, and the every aspheric surface parameter used in above-mentioned formula (13) is as follows.
6th: K=0, A4=3.123280E-05, A6=-1.689150E-06, A8=2.900870E-08, A10=-1.762800E-10, A12=-2.332320E-13
7th: K=0, A4=-7.601240E-06, A6=-1.543080E-06, A8=2.339940E-08, A10=-1.740290E-10
13rd: K=0, A4=-6.154640E-05, A6=-9.647410E-07, A8=9.545830E-09, A10=-1.932580E-10
14th: K=0, A4=3.097760E-05, A6=-1.074140E-06, A8=1.148390E-08, A10=-1.725320E-10
18th: K=1.483171E+00, A4=-7.552000E-06, A6=3.933000E-07, A8=-2.707560E-08, A10=5.570440E-10
19th: K=-2.013300E-01, A4=5.438610E-05, A6=2.628790E-07, A8=7.452260E-09, A10=-3.862870E-10, A12=8.237870E-12
Variable range DA between first lens set G1 of embodiment 7 and the second lens set G2, the variable range DC between the variable interval DB between the second lens set G2 and aperture AD, aperture AD and the 3rd lens set G3, the variable range DD between the 3rd lens set G3 and the 4th lens set G4, the variation that these parameters occur along with zoom is shown in table 16.
Table 16
| Focal length | 16.15 | 29.49 | 53.85 |
| Variable DA | 0.61881 | 4.09941 | 21.07712 |
| Variable DB | 2.6532 | 2.84596 | 4.10683 |
| Variable DC | 16.46451 | 6.63804 | 2.60001 |
| Variable DD | 3.78172 | 2.26578 | 1.65 |
The zoom lens that Figure 28 ~ Figure 30 shows embodiment 7 successively wide-angle, mid-focal length, look in the distance time aberration diagram.
The each entry value of above-described embodiment 7 in conditional (7) ~ (12) is as shown in the table.
Table 17
| Embodiment 7 | |
| Conditional (7) | 2.726 |
| Conditional (8) | -1.214 |
| Conditional (9) | -1.158 |
| Conditional (10) | 70.24 |
| Conditional (11) | 0.886 |
| Conditional (12) | 3.34 |
As known from Table 17, the zoom lens of embodiment 7 satisfies condition formula (7) ~ (12).
< embodiment 8>
Figure 23 is the schematic diagram of the zoom lens optics structure of embodiment 8 in second embodiment of the invention and the zoom track of this zoom lens optics, and when wherein (a) is wide-angle, (b) when being mid-focal length, (c) look in the distance) time along the cross section of optical axis.As shown in figure 22, in zoom lens along optical axis from the left side of subject one side and figure, set gradually the first lens set G1 with positive refractive power, there is the second lens set G2 of negative refractive power, there is the 3rd lens set G3 of negative refractive power, there is the 4th lens set G4 of positive refractive power, and there is the 5th lens set G5 of positive refractive power, aperture AD is provided with between second lens set G3 and the 3rd lens set G4, from wide-angle to look in the distance zoom time, all lens set move, wherein, first pieces group G1, 4th lens set G4 and the 5th lens set G5 moves to subject one side all the time, second lens set G2 and the 3rd lens set G3 along the arching trajectory protruded to imaging surface one side or wherein a part of track move, distance between first lens set G1 and the second lens set G2 increases, distance between second lens set G2 and the 3rd lens set G3 increases, distance between 3rd lens set G3 and the 4th lens set G4 reduces, distance between 4th lens set G4 and the 5th lens set G5 reduces, aperture AD and the 4th lens set G4 one is mobile.
First lens set G1 is configured to set gradually convex surface from subject one side towards the negative crescent eyeglass i.e. first eyeglass L1 of subject and convex surface towards the just crescent eyeglass i.e. second eyeglass L2 of subject, amounts to two panels eyeglass.This first eyeglass L1 and the second eyeglass L2 be close together and bond form as one in conjunction with eyeglass.
Second lens set G2 is formed with three eyeglasses, and the curvature of the negative crescent eyeglass i.e. three eyeglass L3 of the convex surface namely set gradually from subject one side towards subject, the concave surface in the face of imaging surface is comparatively large and the face of eyeglass both sides is aspheric concave-concave eyeglass i.e. the 4th eyeglass L4 and both sides minute surface is biconvex eyeglass i.e. the 5th eyeglass that radius-of-curvature is identical.
The 6th eyeglass L6 that 3rd lens set G3 bears crescent eyeglass with convex surface in the face of imaging surface is formed.
4th lens set G4 is formed with three eyeglasses, and the comparatively large and face of eyeglass both sides of the curvature of the convex surface in the face of subject namely set gradually from subject one side is aspheric biconvex eyeglass i.e. the 7th eyeglass L7, towards larger biconvex eyeglass i.e. the 8th eyeglass L8 of the curvature of the convex surface of subject and in the face of larger concave-concave eyeglass i.e. the 9th eyeglass L9 of the curvature of the concave surface of imaging surface.Wherein the 8th eyeglass L8 and the 9th eyeglass L9 be close together and bond form as one in conjunction with eyeglass.
With the curvature of the convex surface towards imaging surface, comparatively large and eyeglass both sides are aspheric biconvex eyeglass i.e. the tenth eyeglass L10 and convex surface and are formed towards negative crescent eyeglass i.e. the 11 eyeglass L11 of imaging surface 5th lens set G5.
Below show the concrete numerical value of the zoom lens of the present embodiment.Maximum image height in the present embodiment is 14.3mm.But in order to compensate the distortion occurred in image with distortion compensation image procossing when wide-angle, the distortion born in advance, considers distortion size at this, setting most elephant height is 12.3mm.
Its result, as shown in Figure 31 ~ 33, the aberration in the present embodiment 8 all obtains good compensation, corresponding can have more than 5,000,000 ~ the resolution characteristic of the photo detector of 1,000 ten thousand pixels.From the present embodiment 8, utilize the structure of zoom lens of the present invention, fully can realize miniaturization and guarantee to obtain good image shape energy.
Table 18 shows the optical characteristics of each optical element in embodiment 8.
Represent glass types by glass manufacture enterprise name in the present embodiment 8, wherein, HOYA represents person of outstanding talent refined (HOYA) company, and OHARA represents little Yuan company.This expression is identical in each following embodiment.
Variation range in the present embodiment 8 during the zoom of the focal distance f of whole optical system, F value, half angle of view ω is respectively f=16.15 ~ 53.85, F=3.69 ~ 5.60, ω=41.5 ~ 14.9.
Table 18
| Face is numbered | r | d | nd | vd | θgF | Glass material | Manufacturer |
| R1 | 34.48295 | 1.20006 | 1.84666 | 23.78 | 0.6205 | STIH53 | OHARA |
| R2 | 23.45104 | 5.79667 | 1.741 | 52.64 | 0.5467 | SLAL61 | OHARA |
| R3 | 149.157 | Variable DA | |||||
| R4 | 259.7069 | 0.8998 | 2.001 | 29.13 | 0.5994 | TAFD55 | HOYA |
| R5 | 11.37035 | 4.2485 | |||||
| R6* | -75.67448 | 0.80001 | 1.8086 | 40.42 | 0.5691 | LLAH84 | OHARA |
| R7* | 35.75016 | 1.31204 | |||||
| R8 | 26.3569 | 3.6056 | 1.84666 | 23.78 | 0.6205 | STIH53 | OHARA |
| R9 | -26.3569 | Variable DB | |||||
| R10 | -18.5483 | 0.8 | 1.58913 | 61.13 | 0.5407 | SBAL35 | OHARA |
| R11 | -991.8804 | Variable DC | |||||
| R12 | ∞ | 1.45 | |||||
| R13* | 16.19943 | 3.84867 | 1.48749 | 70.24 | 0.5300 | SFSL5 | OHARA |
| R14* | -25.46186 | 0.10002 | |||||
| R15 | 13.27982 | 3.76041 | 1.53172 | 48.84 | 0.5631 | STIL6 | OHARA |
| R16 | -29.32047 | 2.03985 | 1.834 | 37.16 | 0.5776 | SLAH60 | OHARA |
| R17 | 11.87883 | Variable DD | |||||
| R18* | 22.8304 | 5.29988 | 1.58913 | 61.15 | 0.5382 | LBAL35 | OHARA |
| R19* | -13.12567 | 0.35789 | |||||
| R20 | -19.67938 | 1.50033 | 1.90366 | 31.32 | 0.5947 | TAFD25 | HOYA |
| R21 | -374.3567 | Arbitrarily | |||||
| R22 | ∞ | 2.31 | 1.5168 | 64.2 | Various optical filter | ||
| R23 | ∞ | 1.5 | |||||
| R24 | ∞ | 0.7 | 1.5168 | 64.2 | Cover glass | ||
| R25 | ∞ | B.F. |
In table 18, afterbody is added with the face numbering expression aspheric surface of mark *.
In table 18, the 6th, the 7th, the 13rd, the 14th, the 18th of attach mark " * " and the optical surface of the 19th are aspheric surface, and the every aspheric surface parameter used in above-mentioned formula (13) is as follows.
6th: K=0.0, A4=-3.432080E-05, A6=-1.317580E-07, A8=1.551760-09, A10=-3.77847E-11, A12=90109900E-13
7th: K=0.0, A4=-5.719400E-05, A6=-3.697210E-08, A8=-5.3321940E-09, A10=8.765160E-11
13rd: K-0.0, A4=-1.261050E-05, A6=-5.882750E-07, A8=1.310640E-08, A10=-3.236260E-10
14th: K=0.0, A4=3.021540E-05, A6=-6.444950E-0.7, A8=1.762480E-08, A10=3.9-3.948560E-10
18th: K=1.392250E-01, A4=2.530150E-06, A6=5.784150E-08, A8=-2.182630E-09, A10=1.154860E-10
19th: K=9.257800E-02, A4=7.928330E-05, A6=4.663410E-07, A8=-1.003880E-08, A10=1.913560E-10
The variation that variable range DA between first lens set G1 of embodiment 8 and the second lens set G2, the variable range DG between the variable interval DB between the second lens set G2 and aperture AD, aperture AD and the 3rd lens set G3, the variable range DD between the 3rd lens set G3 and the 4th lens set G4 occur along with zoom is shown in table 19.
Table 19
| Focal length | 16.15 | 29.48 | 53.85 |
| Variable DA | 0.64298 | 6.61647 | 17.81478 |
| Variable DB | 2.46509 | 2.84115 | 3.96433 |
| Variable DC | 16.61881 | 7.49801 | 2.59956 |
| Variable DD | 4.8022 | 2.33625 | 1.83023 |
The zoom lens that Figure 31 ~ Figure 33 shows embodiment 7 successively wide-angle, mid-focal length, look in the distance time aberration diagram.
The each entry value of above-described embodiment 8 in conditional (7) ~ (12) is as shown in the table.
Table 20
| Embodiment 8 | |
| Conditional (7) | 2.602 |
| Conditional (8) | -1.395 |
| Conditional (9) | -1.088 |
| Conditional (10) | 61.13 |
| Conditional (11) | 0.886 |
| Conditional (12) | 3.34 |
As known from Table 20, the zoom lens of embodiment 8 satisfies condition formula (7) ~ (12).
< embodiment 9>
Figure 24 is the schematic diagram of the zoom lens optics structure of embodiment 9 in second embodiment of the invention and the zoom track of this zoom lens optics, and when wherein (a) is wide-angle, (b) when being mid-focal length, (c) look in the distance) time along the cross section of optical axis.As shown in figure 24, in zoom lens along optical axis from the left side of subject one side and figure, set gradually the first lens set G1 with positive refractive power, there is the second lens set G2 of negative refractive power, there is the 3rd lens set G3 of negative refractive power, there is the 4th lens set G4 of positive refractive power, and there is the 5th lens set G5 of positive refractive power, aperture AD is provided with between second lens set G3 and the 3rd lens set G4, from wide-angle to look in the distance zoom time, all lens set move, wherein, first pieces group G1, 4th lens set G4 and the 5th lens set G5 moves to subject one side all the time, second lens set G2 and the 3rd lens set G3 along the arching trajectory protruded to imaging surface one side or wherein a part of track move, distance between first lens set G1 and the second lens set G2 increases, distance between second lens set G2 and the 3rd lens set G3 increases, distance between 3rd lens set G3 and the 4th lens set G4 reduces, distance between 4th lens set G4 and the 5th lens set G5 reduces, aperture AD and the 4th lens set G4 one is mobile.
First lens set G1 is configured to set gradually convex surface from subject one side towards the negative crescent eyeglass i.e. first eyeglass L1 of subject and convex surface towards the just crescent eyeglass i.e. second eyeglass L2 of subject, amounts to two panels eyeglass.This first eyeglass L1 and the second eyeglass L2 be close together and bond form as one in conjunction with eyeglass.
Second lens set G2 is formed with three eyeglasses, the comparatively large and face of eyeglass both sides of the curvature of the negative crescent eyeglass i.e. three eyeglass L3 of the convex surface namely set gradually from subject one side towards subject, the concave surface in the face of imaging surface be the aspheric concave-concave eyeglass i.e. radius-of-curvature of the 4th eyeglass L4 and both sides minute surface equal biconvex eyeglass i.e. the 5th eyeglass.
3rd lens set G3 is formed with negative crescent eyeglass i.e. the 6th eyeglass L6 of convex surface towards imaging surface.
4th lens set G4 is formed with three eyeglasses, and the comparatively large and face of eyeglass both sides of the curvature of the convex surface in the face of subject namely set gradually from subject one side is aspheric biconvex eyeglass i.e. the 7th eyeglass L7, towards larger biconvex eyeglass i.e. the 8th eyeglass L8 of the curvature of the convex surface of subject and in the face of larger concave-concave eyeglass i.e. the 9th eyeglass L9 of the curvature of the concave surface of imaging surface.Wherein the 8th eyeglass L8 and the 9th eyeglass L9 be close together and bond form as one in conjunction with eyeglass.
With the curvature of the convex surface towards imaging surface, comparatively large and eyeglass both sides are aspheric biconvex eyeglass i.e. the tenth eyeglass L10 and convex surface and are formed towards negative crescent eyeglass i.e. the 11 eyeglass L11 of imaging surface 5th lens set G5.
Below show the concrete numerical value of the zoom lens of the present embodiment.Maximum image height in the present embodiment is also 14.3mm.
Its result, as shown in Figure 34 ~ 36, the aberration in the present embodiment 7 all obtains good compensation, corresponding can have more than 5,000,000 ~ the resolution characteristic of the photo detector of 1,000 ten thousand pixels.From the present embodiment 9, utilize the structure of zoom lens of the present invention, fully can realize miniaturization and guarantee to obtain good image shape energy.
Table 21 shows the optical characteristics of each optical element in embodiment 9.
Represent glass types by glass manufacture enterprise name in the present embodiment 9, wherein, HOYA represents person of outstanding talent refined (HOYA) company, and OHARA represents little Yuan company.This expression is identical in each following embodiment.
Variation range in the present embodiment 9 during the zoom of the focal distance f of whole optical system, F value, half angle of view ω is respectively f=16.15 ~ 53.85, F=3.68 ~ 5.55, ω=41.5 ~ 14.87.
Table 21
| Face is numbered | r | d | nd | vd | θgF | Glass material | Manufacturer |
| R1 | 34.95704 | 1.30001 | 1.84666 | 23.78 | 0.6205 | STIH53 | OHARA |
| R2 | 23.60593 | 5.86984 | 1.741 | 52.64 | 0.5467 | SLAL61 | OHARA |
| R3 | 151.1807 | Variable DA | |||||
| R4 | 299.9571 | 0.97009 | 2.001 | 29.13 | 0.5994 | TAFD55 | HOYA |
| R5 | 11.13285 | 4.29663 | |||||
| R6 | -70.40818 | 0.8 | 1.8086 | 40.42 | 0.5691 | LLAH84 | OHARA |
| R7 | 36.93918 | 0.99318 | |||||
| R8 | 25.74916 | 3.66798 | 1.84666 | 23.78 | 0.6205 | STIH53 | OHARA |
| R9 | -25.74916 | Variable DB | |||||
| R10 | -18.53351 | 0.8 | 1.58913 | 61.13 | 0.5407 | SBAL35 | OHARA |
| R11 | -393.5047 | Variable DC | |||||
| R12 | ∞ | 1.44993 | |||||
| R13 | 15.66887 | 4.15645 | 1.48749 | 70.24 | 0.5300 | SFSL5 | OHARA |
| R14 | -27.94159 | 0.1 | |||||
| R15 | 13.07805 | 3.77258 | 1.53172 | 48.84 | 0.5631 | STIL6 | OHARA |
| R16 | -26.8818 | 2.00933 | 1.834 | 37.16 | 0.5776 | SLAH60 | OHARA |
| R17 | 12.0058 | Variable DD | |||||
| R18 | 24.19269 | 5.29997 | 1.58913 | 61.15 | 0.5382 | LBAL35 | OHARA |
| R19 | -13.20634 | 0.37853 | |||||
| R20 | -19.02546 | 0.79998 | 1.90366 | 31.32 | 0.5947 | TAFD25 | HOYA |
| R21 | -138.0287 | Arbitrarily | |||||
| R22 | ∞ | 0.7 | 1.5168 | 64.2 | Various optical filter | ||
| R23 | ∞ | 1.5 | |||||
| R24 | ∞ | 0.7 | 1.5168 | 64.2 | Cover glass | ||
| R25 | ∞ | B.F. |
In table 21, afterbody is added with the face numbering expression aspheric surface of mark *.
In table 21, the 6th, the 7th, the 13rd, the 14th, the 18th of attach mark " * " and the optical surface of the 19th are aspheric surface, and the every aspheric surface parameter used in above-mentioned formula (13) is as follows.
6th: K=0, A4=-3.843970E-05, A6=1.211950E-07, A8=-5.466700E-09, A10=3.589930E-11, A12=5.576910E-13
7th: K=0, A4=-6.229330E-05, A6=1.289240E-07, A8=-9.269550E-09, A10=1.049680E-10
13rd: K=0, A4=4.838910E-06, A6=-2.840070E-07, A8=8.697220E-09, A10=-1.836370E-11
14th: K=0, A4=4.698360E-05, A6=-1.627670E-07, A8=5.742440E-09, A10=2.564070E-11
18th: K=-1.373112E+00, A4=1.668360E-05, A6=1.266830E-07, A8=-5.146740E-09, A10=1.518190E-10
19th: K=-2.895300E-02, A4=7.250660E-05, A6=6.967700E-07, A8=-1.676340E-08, A10=2.591100E-10
Variable range DA between first lens set G1 of embodiment 9 and the second lens set G2, the variable range DC between the variable interval DB between the second lens set G2 and aperture AD, aperture AD and the 3rd lens set G3, the variable range DD between the 3rd lens set G3 and the 4th lens set G4, the variation that these parameters occur along with zoom is shown in table 22.
Table 22
| Focal length | 16.15 | 29.49 | 53.85 |
| Variable DA | 0.66174 | 6.7367 | 18.34407 |
| Variable DB | 2.4583 | 2.84657 | 4.01201 |
| Variable DC | 16.66876 | 7.46702 | 2.60012 |
| Variable DD | 5.11922 | 2.44084 | 1.86599 |
The zoom lens that Figure 34 ~ Figure 36 shows embodiment 9 successively wide-angle, mid-focal length, look in the distance time aberration diagram.
The each entry value of above-described embodiment 9 in conditional (7) ~ (12) is as shown in the table.
Table 23
| Embodiment 9 | |
| Conditional (7) | 2.674 |
| Conditional (8) | -1.303 |
| Conditional (9) | -1.120 |
| Conditional (10) | 61.13 |
| Conditional (11) | 0.886 |
| Conditional (12) | 3.34 |
As known from Table 23, the zoom lens of embodiment 9 satisfies condition formula (7) ~ (12).
In addition, in the information process-of image, by the imaging in the imaging surface of imaging apparatus of the image of lens shooting, with imaging apparatus to this image information, now, carry out electronic processing to through informationalized data, compensate the distortion of image.
Therefore, when distortion compensation can be carried out, the zoom lens of above-mentioned first embodiment and the second embodiment can be used for camera or massaging device, the imaging apparatus such as this massaging device reads the image of this zoom lens shooting, now, allow the distortion in the compensation range that occurs to compensate the data after imaging apparatus information process-by electronic processing, thus can further good compensation distortion beyond aberration, contribute to wide angle, high zoom and high performance realization.
Easily distorting more greatly, in the visual angle of camera lens, at least when wide-angle, preferably can carry out distortion compensation in the zoom region comprising wide-angle and mid-focal length.Electricity consumption word processing approximately can carry out 20% distortion compensation.
The zoom lens of the various embodiments described above allows the distortion occurred when wide-angle in electronic processing compensation range, and compensates these distortion by electronic processing.Set less by the paraxial image height of zoom lens when wide-angle, being specially as being 13mm in the first embodiment, being 12.3mm as above in the second embodiment, then by electronic processing, this image height being compensated to 14.3mm.
There is the multiple electronic processing methods for compensating distortion at present, with reference to Figure 37, a wherein example being described at this.
In Figure 37, mark Im1 represents the sensitive surface shape of imaging apparatus, and this sensitive surface is rectangular.The circumscribed circle IC1 of this sensitive surface Im1 is the imaginary circle around sensitive surface Im1, for looking in the distance and areas imaging during middle focal length.
Im2 represents the image planes shape near wide-angle.Near wide-angle, preset and negative distortion occurs, make image planes shape Im2 be fat shape broad in the middle small in ends.At this, for convenience of description, the negative distortion shown in Figure 37 is slightly exaggerated.
Compensate the distortion of above-mentioned fat shape by electronic processing, make image planes shape Im2 be formed as consistent with sensitive surface Im1 shape.
As shown in figure 37, some pixels from being formed between sensitive surface Im1 center and longitudinal datum line on the line of θ angle are considered.
As shown in the figure, the distance of this pixel at a distance of photo detector center is X, when the amount of distortion being X when setpoint distance center is Dis (X) %, can (100X/ (100+Dis (X)), compensates with this by above-mentioned straight line be converted at a distance of the position of centre distance X.So, the image of shooting just can obtain good distortion compensation when wide-angle.
By above-mentioned electronic compensation, desirable image height when mid-focal length and wide-angle reaches the size 14.3mm of required imaginary circle.In other words, imaginary circle size when mid-focal length and wide-angle is converted to (100/ (100+Dis (X)) times of wanted imaginary circle size.
When distortion can be compensated by above-mentioned electronic processing, allow to distort in the compensation range of electronic processing, and degree of freedom and the zoom ratio condition of other aberration compensations are also relaxed, and are expected to increase substantially zoom ratio.And, as mentioned above, reduce imaginary circle when mid-focal length and wide-angle, also there is remarkable result to wide angle.
" the 3rd embodiment "
The massaging device of the 3rd embodiment of the present invention be adopt the zoom lens of the invention described above as photographic optical system, the massaging device with camera function, with subject image imaging on the sensitive surface of imaging apparatus of zoom lens shooting in this massaging device.Namely as mentioned before, massaging device both can be digital camera or video recorder, also can be silver cameras, and the camera as digital camera with the function of the image with the shooting of imaging apparatus reading zoom lens be more suitable for adopting the zoom lens of the invention described above (12).
Have in the zoom lens of the present invention of said structure, focusing lens assembly is established compact, focusing lens amount of movement is little, it is also little that focusing lens group moves energy, be conducive to focus movement high speed and reduce noise, when adopting this wide-angle, half angle of view is more than 36.8 degree, zoom ratio is 1.5 ~ 5 times, sufficient aberration compensation can be carried out and the zoom lens with the resolution characteristic of corresponding high-resolution imaging apparatus for as optical system for camera shooting, be conducive to provide high performance small information device and carrying type information terminal device.
Illustrating below with reference to accompanying drawing adopts the zoom lens of the above-mentioned first and second embodiment as the massaging device of optical system for camera shooting, is described for the digital camera shown in Figure 38 ~ Figure 40 at this.Figure 38 is the schematic diagram of the outward appearance before the digital camera observed from subject one side, and Figure 39 is the schematic diagram of the outward appearance from the digital camera back side that photographer observes.Figure 40 is the module map of the functional structure representing digital camera.Illustrate for digital camera at this, but namely the present invention is also applicable to existing image recording medium utilizes zoom lens in the silver film camera of silver film.In addition, in the massaging device of the carrying type information terminal devices such as the so-called personal data assistants (personal data assistant) generally used at present or mobile phone and so on, camera-enabled is also installed, although this kind of massaging device is different from digital camera in appearance, the function wherein comprised and structure are identical with digital camera in itself.For this reason, the present invention also can be used for the optical system for camera shooting as carrying in this kind of massaging device.
As shown in figure 38, digital camera comprises phtographic lens 101, optical finder 102, exposure lamp 103, shutter key 104, phase machine host 105, power switch 106, liquid crystal display 107, operating key 108, storage card slot 109 and Zoom switch 110 etc.And then as shown in figure 23, in digital camera, also comprise central operation device (CPU) 111, image processing apparatus 112, photo detector 113, signal processing apparatus 114, semiconductor memory 115 and communication card 116 etc.
Digital camera also comprises the phtographic lens 101 of establishing applied optics system and with the photo detector 113 as imageing sensor such as CMOS (complementary metal oxide semiconductor (CMOS)) imaging apparatus or CCD (charge coupled cell) imaging apparatus, photo detector 113 reads the picture of the photography target that phtographic lens 101 is taken.This phtographic lens 101 adopts the zoom lens of the present invention (corresponding to the present invention (13) or (15)) described in the present invention first or second embodiment.
Signal processing apparatus 114 by central operation processor 111 control processes the output of this photo detector 113, and is converted into numerical information.Namely comprise the device subject image that have taken being converted to digital image information in this kind of digital camera, in fact this device is configured to comprise photo detector 113, signal processing apparatus 114 and carry out the central operation processor (CPU) 111 controlled.
The image of above-mentioned numerical information, after the image procossing being subject to equally to be specified in the image processing apparatus 112 of central operation processor 111 control, is saved to the semiconductor storages such as Nonvolatile memory devices 115.Semiconductor storage 115 now both can be inserted in the storage card in storage card slot 109, also can be the built-in semiconductor memory of phase machine host.Liquid crystal display 107 can show the image among taking, and what can show the image be kept in semiconductor memory 115.Image in semiconductor memory 115 externally can be exported by communication card 16.
Carry being covered by Jing Gai object plane of the phtographic lens 101 in period digital camera, after user operation power switch 106 switches on power, mirror cover is opened, and exposes object plane.Now, setting when each arrangement of mirrors sheet in the inner zoom lens of lens barrel of phtographic lens 101 is such as in short focus (wide-angle), by operation zoom key 110, change the setting of each arrangement of mirrors sheet, via mid-focal length to long-focus (looking in the distance) zoom.Now, the optical system of preferred view finder 102 is linked in the visual angle change of phtographic lens 101 and carries out zoom.
In the ordinary course of things, key 104 of partly tripping focuses on.
The a part of lens set of zoom lens of the present invention both in removable zoom lens in many group lens set focuses on, and also movable receiving optical element focuses on.Press shutter key 104 further and complete photography, then carry out above-mentioned process.
By predetermined operation operating key 108, liquid crystal display 7 shows the image preserved in semiconductor storage 115 or with communication card 116 etc., externally to send in this semiconductor storage 115 visual time, semiconductor storage 115 and communication card 116 etc. can be inserted the special or general slot such as slot 109 or communication card slot respectively.
The phtographic lens 101 of the formation of the zoom lens shown in the first embodiment already described can be utilized in the camera heads such as above-mentioned digital camera or massaging device as optical system for camera shooting.For this reason, the high image quality image photographing device or the massaging device that realize the photo detector possessing 5,000,000 ~ 1,000 ten thousand pixels or more pixel is expected to.
And then zoom lens of the present invention also can be used for the head shadow camera lens of zoom shot camera lens as silver cameras or projector.
Claims (18)
1. a zoom lens, consist of the first lens set setting gradually to imaging surface one side along optical axis from subject one side and there is positive refractive power, there is the second lens set of negative refractive power, there is the 3rd lens set of negative refractive power, there is the 4th lens set of positive refractive power and there is the 5th lens set of positive refractive power, between 3rd lens set and the 4th lens set, aperture is set, from wide-angle to look in the distance zoom time, described first lens set moves to subject one side, distance between this first lens set and described second lens set increases, distance between this second lens set and described 3rd lens set increases, distance between 3rd lens set and described 4th lens set reduces, distance between 4th lens set and described 5th lens set reduces, described 3rd lens set is born eyeglass with a slice and is formed, focusing is carried out by the movement of the 3rd lens set, it is characterized in that, at the focal length F2 of described second lens set, the focal length F3 of described 3rd lens set, during wide-angle whole system focal length Fw and when looking in the distance the focal length Ft of whole system geometric mean Fm between satisfy the following conditional expression (1),
-3.0 < (F2-F3)/Fm <-0.5 formula (1)
Wherein,
2. zoom lens according to claim 1, is characterized in that, the horizontal magnification β of the 3rd lens set described in during wide-angle
3wwith the horizontal magnification β of the 3rd lens set when looking in the distance
3tsatisfy the following conditional expression respectively (2) and (3),
| β
3w| < 0.15 formula (2)
| β
3t| < 0.15 formula (3).
3. zoom lens according to claim 1, is characterized in that, emergent pupil distance Exp during wide-angle and satisfying the following conditional expression (4) between the maximum image height Y ' when looking in the distance,
1 < Exp/Y ' < 3 formula (4).
4. zoom lens according to claim 1, is characterized in that, when the maximum image height Y ' when looking in the distance and wide-angle whole system focal length Fw between satisfy the following conditional expression (5),
Y '/Fw > 0.75 formula (5).
5. zoom lens according to claim 1, is characterized in that, when looking in the distance when the focal length Ft of whole system and wide-angle whole system focal length Fw between satisfy the following conditional expression (6),
Ft/Fw > 1.5 formula (6).
6. a zoom lens, consist of the first lens set setting gradually to imaging surface one side along optical axis from subject one side and there is positive refractive power, there is the second lens set of negative refractive power, there is the 3rd lens set of negative refractive power, and with the follow-up lens set that many groups or a group are formed, from wide-angle to look in the distance zoom time, distance between described first lens set and described second lens set increases, distance between this second lens set and described 3rd lens set increases, distance between 3rd lens set and described follow-up lens set changes, focusing is carried out by the movement of the 3rd lens set, it is characterized in that, at the focal length F2 of the second lens set, the focal length F3 of the 3rd lens set, the synthesis focal length F23t of the second lens set when looking in the distance and the 3rd lens set, during wide-angle whole system focal length Fw and when looking in the distance the focal length Ft of whole system geometric mean Fm between satisfy the following conditional expression (7) ~ (9),
2.0 < F3/F23t < 3.0 formula (7)
-2.5 < F2/Fm <-1.0 formula (8)
-1.4 < F3/Fm <-0.5 formula (9)
Wherein,
7. a zoom lens, consist of the first lens set setting gradually to imaging surface one side along optical axis from subject one side and there is positive refractive power, there is the second lens set of negative refractive power, there is the 3rd lens set of negative refractive power, and with the follow-up lens set that many groups or a group are formed, from wide-angle to look in the distance zoom time, distance between described first lens set and described second lens set increases, distance between this second lens set and described 3rd lens set increases, distance between 3rd lens set and described follow-up lens set changes, focusing is carried out by the movement of the 3rd lens set, it is characterized in that, bear eyeglass by a slice and form described 3rd lens set, and, at the focal length F2 of described second lens set, the focal length F3 of the 3rd lens set, the synthesis focal length F23t of the second lens set when looking in the distance and the 3rd lens set, during wide-angle whole system focal length Fw and when looking in the distance the focal length Ft of whole system geometric mean Fm between satisfy the following conditional expression (7) ~ (9),
2.0 < F3/F23t < 3.0 formula (7)
-2.5 < F2/Fm <-1.0 formula (8)
-1.4 < F3/Fm <-0.5 formula (9)
Wherein,
8. zoom lens according to claim 7, is characterized in that, the Ah's multiple forming the described negative eyeglass of described 3rd lens set satisfies the following conditional expression (10),
Vd > 50 formula (10).
9. the zoom lens according to claim 6 or 7, is characterized in that, follow-up lens set is the aperture that sets gradually to imaging surface one side from subject one side and has the 4th lens set of positive refractive power and have the 5th lens set of positive refractive power.
10. the zoom lens according to claim 6 or 7, is characterized in that, when being configured to zoom, all lens set are moved.
11. zoom lens according to claim 6 or 7, is characterized in that, when the maximum image height Y ' when looking in the distance and wide-angle whole system focal length Fw between satisfy the following conditional expression (11),
Y '/Fw > 0.75 formula (11).
12. zoom lens according to claim 6 or 7, is characterized in that, when looking in the distance when the focal length Ft of whole system and wide-angle whole system focal length Fw between satisfy the following conditional expression (12),
Ft/Fw > 3.0 formula (12).
13. according to the zoom lens in claim 1,6,7 described in any one, it is characterized in that, can be used for massaging device, this massaging device imaging apparatus reads the image of this zoom lens shooting, allows the distortion within the compensation range occurring to compensate the data after imaging apparatus information process-by electronic processing in this zoom lens.
14. 1 kinds of cameras, is characterized in that, with the zoom lens in claim 1 ~ 13 described in any one as photographing optical system.
15. cameras according to claim 14, is characterized in that, have the function of the image reading zoom lens shooting with imaging apparatus.
16. 1 kinds of massaging devices, is characterized in that, with the zoom lens in claim 1 ~ 13 described in any one as photographing optical system.
17. massaging devices according to claim 16, is characterized in that, have the function of the image reading zoom lens shooting with imaging apparatus.
18. 1 kinds of carrying type information terminal devices, is characterized in that with the photographing optical system of the zoom lens in claim 1 ~ 13 described in any one as camera-enabled portion.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011-026157 | 2011-02-09 | ||
| JP2011026157A JP5648517B2 (en) | 2011-02-09 | 2011-02-09 | Zoom lens and camera and information device |
| JP2011037731A JP5664969B2 (en) | 2011-02-23 | 2011-02-23 | Zoom lens, information device, and portable information terminal device |
| JP2011-037731 | 2011-02-23 |
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| CN102636865A CN102636865A (en) | 2012-08-15 |
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| JP5854269B2 (en) * | 2012-02-07 | 2016-02-09 | 株式会社タムロン | Large aperture ratio internal focusing telephoto zoom lens |
| JP2013210398A (en) * | 2012-02-29 | 2013-10-10 | Ricoh Co Ltd | Zoom lens, image capturing device, and mobile information terminal device |
| CN108363193B (en) * | 2013-07-29 | 2021-04-20 | 株式会社尼康 | Variable magnification optical system and optical apparatus |
| CN110573924B (en) * | 2017-04-05 | 2022-05-10 | 株式会社尼康 | Variable magnification optical system, optical device, and method of manufacturing variable magnification optical system |
| US10712544B2 (en) * | 2018-06-10 | 2020-07-14 | Logitech Europe S.A. | Lens assembly for a videoconferencing system |
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|---|---|---|---|---|
| US5502594A (en) * | 1992-10-14 | 1996-03-26 | Nikon Corporation | Zoom lens incorporating vibration-proofing function |
| JPH11160621A (en) * | 1997-11-26 | 1999-06-18 | Nikon Corp | Zoom lens |
| JP3072815B2 (en) * | 1993-10-08 | 2000-08-07 | キヤノン株式会社 | Variable power optical system |
| CN101408665A (en) * | 2007-10-09 | 2009-04-15 | 富士能株式会社 | Rear-focusing type zoom lens and imaging apparatus |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH0261315A (en) * | 1988-08-26 | 1990-03-01 | Kioritz Corp | Air discharge device utilizing exhaust gas |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5502594A (en) * | 1992-10-14 | 1996-03-26 | Nikon Corporation | Zoom lens incorporating vibration-proofing function |
| DE69316510T2 (en) * | 1992-10-14 | 1998-05-28 | Nikon Corp | Zoom lens with vibration damping |
| JP3072815B2 (en) * | 1993-10-08 | 2000-08-07 | キヤノン株式会社 | Variable power optical system |
| JPH11160621A (en) * | 1997-11-26 | 1999-06-18 | Nikon Corp | Zoom lens |
| CN101408665A (en) * | 2007-10-09 | 2009-04-15 | 富士能株式会社 | Rear-focusing type zoom lens and imaging apparatus |
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