WO2021200257A1 - Lentille grossissante et dispositif de prise d'image - Google Patents

Lentille grossissante et dispositif de prise d'image Download PDF

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Publication number
WO2021200257A1
WO2021200257A1 PCT/JP2021/011305 JP2021011305W WO2021200257A1 WO 2021200257 A1 WO2021200257 A1 WO 2021200257A1 JP 2021011305 W JP2021011305 W JP 2021011305W WO 2021200257 A1 WO2021200257 A1 WO 2021200257A1
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Prior art keywords
lens group
lens
focusing
zoom lens
positive
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PCT/JP2021/011305
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English (en)
Japanese (ja)
Inventor
三坂　誠
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ソニーグループ株式会社
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Priority to JP2022511911A priority Critical patent/JPWO2021200257A1/ja
Publication of WO2021200257A1 publication Critical patent/WO2021200257A1/fr

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/18—Optical objectives specially designed for the purposes specified below with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B15/00—Optical objectives with means for varying the magnification
    • G02B15/14—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective
    • G02B15/16—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group
    • G02B15/20—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group having an additional movable lens or lens group for varying the objective focal length

Definitions

  • the present disclosure relates to a zoom lens and an imaging device.
  • Floating focus As a focusing method for zoom lenses, there is a so-called floating focus in which a plurality of lens groups are moved as focusing groups to perform focusing. Floating focus has the advantage that it is easy to maintain good image performance during close-up photography by canceling aberration fluctuations associated with the movement of a plurality of focusing groups.
  • Patent Documents 1 to 5 disclose a zoom lens that employs a floating focus.
  • the zoom lens according to the embodiment of the present disclosure includes a first lens group having a negative refractive force in order from the object side to the image plane side, and adjacent lens groups during zooming or focusing at a short distance. It is composed of a subsequent group including a plurality of lens groups in which the distance between the lenses changes, and the plurality of lens groups are a positive lens group, a negative lens group, a first lens group, and a positive lens group that move when focusing to a short distance.
  • the first lens group and the intermediate lens group are closely spaced from each other during zooming from the wide-angle end to the telephoto end, including an intermediate lens group that is arranged between the lens and has a positive refractive force at all times during zooming.
  • the positive lens group moves to the object side when focusing to a short distance, and the following conditional expression is satisfied.
  • Fsw1 Amount of movement of the positive lens group at the wide-angle end during focusing
  • Fsw2 Amount of movement of the negative lens group at the wide-angle end during focusing
  • Fst1 Amount of movement of the positive lens group at the telephoto end during focusing
  • Fst2 Amount of movement of the positive lens group at the telephoto end during focusing
  • Fst2 Negative lens group at the telephoto end It is the amount of movement during focusing.
  • the image pickup apparatus includes a zoom lens and an image pickup device that outputs an image pickup signal corresponding to an optical image formed by the zoom lens, and the zoom lens is the embodiment of the present disclosure. It is composed of a zoom lens according to the form.
  • the zoom lens or imaging device is composed of a first lens group having a negative refractive power and a subsequent group including a plurality of lens groups, and changes in various aberrations due to focusing are caused.
  • the configuration of each lens group has been optimized so that it is well corrected and suitable for wide-angle lensing.
  • FIG. 5 is an aberration diagram showing various aberrations at the wide-angle end and infinity focusing of the zoom lens according to the first embodiment.
  • FIG. 5 is an aberration diagram showing various aberrations at an intermediate focal length and infinity focusing of the zoom lens according to the first embodiment.
  • FIG. 5 is an aberration diagram showing various aberrations at the telephoto end and infinity focusing of the zoom lens according to the first embodiment.
  • FIG. 5 is an aberration diagram showing various aberrations at the wide-angle end and short-range focusing of the zoom lens according to the first embodiment. It is an aberration diagram which shows various aberrations at the time of the intermediate focal length and the short-distance focusing of the zoom lens which concerns on Example 1.
  • FIG. 5 is an aberration diagram showing various aberrations at the telephoto end and short-range focusing of the zoom lens according to the first embodiment.
  • FIG. 5 is an aberration diagram showing various aberrations at the wide-angle end and infinity focusing of the zoom lens according to the second embodiment.
  • FIG. 5 is an aberration diagram showing various aberrations at an intermediate focal length and infinity focusing of the zoom lens according to the second embodiment. It is an aberration diagram which shows various aberrations at the telephoto end and infinity focusing of the zoom lens which concerns on Example 2.
  • FIG. FIG. 5 is an aberration diagram showing various aberrations at the wide-angle end and short-range focusing of the zoom lens according to the second embodiment.
  • FIG. 5 is an aberration diagram showing various aberrations at the telephoto end and short-range focusing of the zoom lens according to the second embodiment.
  • FIG. 5 is an aberration diagram showing various aberrations at the wide-angle end and infinity focusing of the zoom lens according to the third embodiment.
  • FIG. 5 is an aberration diagram showing various aberrations at an intermediate focal length and infinity focusing of the zoom lens according to the third embodiment. It is an aberration diagram which shows various aberrations at the telephoto end and infinity focusing of the zoom lens which concerns on Example 3.
  • FIG. 5 is an aberration diagram showing various aberrations at the wide-angle end and short-range focusing of the zoom lens according to the third embodiment. It is an aberration diagram which shows various aberrations at the time of the intermediate focal length and the short-distance focusing of the zoom lens which concerns on Example 3.
  • FIG. FIG. 5 is an aberration diagram showing various aberrations at the telephoto end and short-range focusing of the zoom lens according to the third embodiment.
  • FIG. 5 is an aberration diagram showing various aberrations at the wide-angle end and infinity focusing of the zoom lens according to the fourth embodiment.
  • FIG. 5 is an aberration diagram showing various aberrations at an intermediate focal length and infinity focusing of the zoom lens according to the fourth embodiment.
  • FIG. 5 is an aberration diagram showing various aberrations at the wide-angle end and short-range focusing of the zoom lens according to the fourth embodiment. It is an aberration diagram which shows various aberrations at the time of the intermediate focal length and the short-distance focusing of the zoom lens which concerns on Example 4.
  • FIG. FIG. 5 is an aberration diagram showing various aberrations at the telephoto end and short-range focusing of the zoom lens according to the fourth embodiment.
  • FIG. 5 is an aberration diagram showing various aberrations at the wide-angle end and infinity focusing of the zoom lens according to the fifth embodiment.
  • FIG. 5 is an aberration diagram showing various aberrations at an intermediate focal length and infinity focusing of the zoom lens according to the fifth embodiment.
  • FIG. 5 is an aberration diagram showing various aberrations at the telephoto end and infinity focusing of the zoom lens according to the fifth embodiment.
  • FIG. 5 is an aberration diagram showing various aberrations at the wide-angle end and short-range focusing of the zoom lens according to the fifth embodiment. It is an aberration diagram which shows various aberrations at the time of the intermediate focal length and the short-distance focusing of the zoom lens which concerns on Example 5.
  • FIG. FIG. 5 is an aberration diagram showing various aberrations at the telephoto end and short-range focusing of the zoom lens according to the fifth embodiment.
  • FIG. 5 is an aberration diagram showing various aberrations at the wide-angle end and infinity focusing of the zoom lens according to the sixth embodiment.
  • FIG. 5 is an aberration diagram showing various aberrations at an intermediate focal length and infinity focusing of the zoom lens according to the sixth embodiment.
  • FIG. 5 is an aberration diagram showing various aberrations at the telephoto end and infinity focusing of the zoom lens according to the sixth embodiment.
  • FIG. 5 is an aberration diagram showing various aberrations at the wide-angle end and short-range focusing of the zoom lens according to the sixth embodiment. It is an aberration diagram which shows various aberrations at the time of the intermediate focal length and the short-distance focusing of the zoom lens which concerns on Example 6.
  • FIG. 5 is an aberration diagram showing various aberrations at the time of the intermediate focal length and the short-distance focusing of the zoom lens which concerns on Example 6.
  • FIG. 5 is an aberration diagram showing various aberrations at the telephoto end and short-range focusing of the zoom lens according to the sixth embodiment. It is a block diagram which shows one configuration example of an image pickup apparatus. It is a block diagram which shows an example of the schematic structure of a vehicle control system. It is explanatory drawing which shows an example of the installation position of the vehicle exterior information detection unit and the image pickup unit. It is a block diagram which shows an example of the schematic structure of the endoscopic surgery system. It is a block diagram which shows an example of the functional structure of the camera head and CCU shown in FIG. 52.
  • the present disclosure relates to a zoom lens focusing method suitable for a photographic camera for film, an electronic recording type video camera, a digital camera, an electronic still video camera, and the like.
  • the refractive power of the focusing group is appropriately set.
  • the present invention relates to a negative lead type zoom lens in which fluctuations in optical performance due to focusing are satisfactorily corrected.
  • so-called negative lead type zoom lenses preceded by a lens group having a negative refractive power are relatively easy to widen the angle of view, and are therefore often used as wide-angle zoom lenses.
  • so-called front lens focus which moves the first lens group on the object side
  • so-called inner focus and rear focus which move the lens group after the second lens group
  • an inner focus or rear focus zoom lens has an advantage that the light beam effective diameter of the first lens group is smaller than that of a front lens focus zoom lens, so that the entire lens system can be easily miniaturized. ..
  • the relatively small and lightweight lens group is moved, it has a feature that quick focusing is facilitated, especially in the autofocus camera which has become mainstream in recent years.
  • a method generally used in the past in which a first lens group having a negative refractive power is moved toward an object to focus from an infinite object to a short-range object has a wider angle of view of the optical system.
  • the front lens diameter becomes larger.
  • various focusing methods have been conventionally proposed, but there are problems such as an increase in the size of the entire lens system to varying degrees.
  • you try to shorten the close-up shooting distance you have to increase the moving space of the focusing group, and as the drive mechanism becomes larger, the entire device becomes larger, and the aberration fluctuations that accompany focusing make the image performance during close-up photography. was sometimes deteriorated.
  • the inner focus type and the rear focus type have the above-mentioned features, but when trying to further widen the angle of view, fluctuations in various aberrations due to focusing become remarkable, and it is very difficult to maintain good optical performance. I had a problem that became.
  • Patent Documents 1 to 5 disclose zoom lenses that employ a floating focus, but they have the following problems.
  • Patent Document 1 and Patent Document 2 describe, in order from the object side, a first lens group having a negative refractive power, a second lens group having a positive refractive power, and a third lens group having a negative refractive power.
  • a zoom lens having the above is disclosed.
  • the second lens group is moved to the image plane side
  • the third lens group is moved to the image plane side at the wide-angle end side and to the object side at the telephoto end side. Focusing is performed by, but the curvature of field during focusing fluctuates greatly.
  • Patent Document 3 describes, in order from the object side, a first lens group having a negative refractive power, a second lens group having a positive refractive power, a first subgroup having a positive refractive power, and a third negative refractive power. It has two subgroups and a third subgroup with positive power, and when focusing from infinity to the closest distance, the first subgroup moves to the object side and the second subgroup moves to the image plane side.
  • the zoom lens made to do so is disclosed.
  • the curvature of field is particularly large on the wide-angle end side.
  • Patent Document 4 has a first lens group having a negative refractive force, a second lens group having a positive refractive force, and a third lens group having a negative refractive force in order from the object side, and has a second lens.
  • the group is composed of a 2A partial lens group with a positive refractive force and a 2B partial lens group with a positive refractive force
  • the third lens group is a 3A partial lens group with a positive refractive force and a 3B portion with a negative refractive force.
  • a zoom lens composed of a lens group is disclosed.
  • the second B lens group and the third B lens group are moved to perform focusing.
  • the zoom lens disclosed in Patent Document 4 has a particularly large variation in spherical aberration on the wide-angle end side and a half angle of view at the wide-angle end of about 33 °, which is insufficient for a wide-angle zoom lens.
  • Patent Document 5 includes a front group having a negative refractive power and a rear group having a positive refractive power in order from the object side, and the rear group includes a first lens unit and a second lens unit in order from the object side.
  • a zoom lens having a lens unit of the above is disclosed.
  • the first lens unit has a first focus lens group and a second focus lens group on the image side of the first focus lens group. The first focus lens group and the second focus lens group move.
  • the distortion aberration on the wide-angle end side fluctuates greatly.
  • a zoom lens in which fluctuations of various aberrations due to focusing are satisfactorily corrected and suitable for wide-angle lens, and an imaging device equipped with such a zoom lens.
  • the inner floating focus satisfactorily corrects fluctuations in various aberrations associated with focusing, especially fluctuations in distortion at the wide-angle end and fluctuations in curvature of field, and is suitable for wide-angle zoom lenses, and such It is desired to develop an imaging device equipped with a zoom lens.
  • Basic lens configuration> 1 and 2 show a first configuration example of the zoom lens according to the embodiment of the present disclosure, and correspond to the configuration of the first embodiment described later.
  • 3 and 4 show a second configuration example of the zoom lens according to the embodiment, and correspond to the configuration of the second embodiment described later.
  • 5 and 6 show a third configuration example of the zoom lens according to the embodiment, and correspond to the configuration of the third embodiment described later.
  • 7 and 8 show a fourth configuration example of the zoom lens according to the embodiment, and correspond to the configuration of the fourth embodiment described later.
  • 9 and 10 show a fifth configuration example of the zoom lens according to the embodiment, and correspond to the configuration of the fifth embodiment described later.
  • 11 and 12 show a sixth configuration example of the zoom lens according to the embodiment, and correspond to the configuration of the sixth embodiment described later.
  • FIG. 1 FIG. 3, FIG. 5, FIG. 7, FIG. 9, and FIG. 11, the wide-angle end (Wide), the intermediate focal length (Mid), and the telephoto end (Tele) at the time of infinity focusing are shown.
  • the lens arrangement for each is shown.
  • FIG. 4, FIG. 6, FIG. 8, FIG. 10, and FIG. 12 show the wide-angle end (Wide), the intermediate focal length (Mid), and the telephoto end (Tele) at the time of short-range focusing, respectively.
  • the lens arrangement of is shown.
  • Z1 indicates an optical axis.
  • An optical member such as a cover glass for protecting the image sensor may be arranged between the zoom lenses 1 to 6 according to the first to sixth configuration examples and the image plane IP. Further, in addition to the cover glass, various optical filters such as a low-pass filter and an infrared cut filter may be arranged.
  • the configuration of the zoom lens according to the embodiment of the present disclosure will be described in association with the zoom lenses 1 to 6 according to each configuration example shown in FIG. 1 and the like, but the technique according to the present disclosure is illustrated. It is not limited to the configuration example.
  • the zoom lens according to the embodiment includes a first lens group B1 having a negative refractive power and a subsequent group including a plurality of lens groups in order from the object side to the image plane side along the optical axis Z1. It is composed of.
  • the plurality of lens groups include a positive lens group Fb1 that moves when focusing to a short distance and a negative lens group Fb2. Further, the plurality of lens groups include an intermediate lens group Bm which is arranged between the first lens group B1 and the positive lens group Fb1 and always has a positive refractive power during zooming.
  • the second lens group B2 corresponds to the intermediate lens group Bm
  • the third lens group B3 corresponds to the positive lens group Fb1
  • the fourth lens group B4 is negative. It corresponds to the lens group Fb2.
  • the zoom lens when zooming from the wide-angle end to the telephoto end, the distance between the first lens group B1 and the intermediate lens group Bm becomes smaller along the optical axis Z1. Moving. Further, when focusing to a short distance, the positive lens group Fb1 moves toward the object side along the optical axis Z1.
  • the zoom lens according to the embodiment satisfies the following conditional expressions (1) and (2).
  • Fsw1 Amount of movement of the positive lens group Fb1 at the wide-angle end during focusing
  • Fsw2 Amount of movement of the negative lens group Fb2 at the wide-angle end during focusing
  • Fst1 Amount of movement of the positive lens group Fb1 at the telephoto end during focusing
  • Fst2 Amount of movement during focusing of the positive lens group Fb1 at the telephoto end This is the amount of movement of the negative lens group Fb2 during focusing.
  • the zoom lens according to the embodiment further satisfies the predetermined conditional expression and the like described later.
  • the first lens group B1 having a negative refractive power and the succeeding group including a plurality of lens groups are formed, and the configuration of each lens group is optimized. Therefore, it is possible to realize a zoom lens that can satisfactorily correct fluctuations in various aberrations due to focusing and is suitable for wide-angle lensing. In particular, it is possible to realize a wide-angle zoom lens in which fluctuations in distortion on the wide-angle end side and fluctuations in curvature of field are well corrected.
  • the lens group constituting the zoom lens has less aberration in the lens group, but in order to reduce the size of the optical system, the aberration in the lens group remains, and each lens group cancels out the aberration, and the entire system has good optics. Performance is being obtained. Further, in order to reduce the aberration fluctuation due to focusing, it is important to reduce the sum of the aberrations of the lens group arranged on the object side of the focusing group and to reduce the aberration of the focusing group. Therefore, in the zoom lens according to the embodiment, an intermediate lens group Bm having a positive refractive power is arranged between the first lens group B1 having a negative refractive power and the positive lens group Fb1 which is a focusing group.
  • the positive lens group Fb1 and the negative lens group Fb2 are set as a focusing group, and the movement amount at the time of each focusing is set as a predetermined condition to reduce the aberration fluctuation due to the focusing.
  • Conditional expression (1) defines the amount of movement during focusing between the positive lens group Fb1 and the negative lens group Fb2 at the wide-angle end.
  • the conditional expression (2) defines the amount of movement of the positive lens group Fb1 and the negative lens group Fb2 at the telephoto end during focusing. By satisfying the conditional expression (2), it is possible to suppress fluctuations associated with focusing of spherical aberration, especially at the telephoto end.
  • the difference in the amount of movement during focusing between the positive lens group Fb1 and the negative lens group Fb2 is smaller at the wide-angle end than at the telephoto end, and is positive at the telephoto end.
  • the amount of movement of the lens group Fb1 is larger than that of the negative lens group Fb2. Since the positive lens group Fb1 and the negative lens group Fb2 have different refractive powers, the amount of movement during focusing tends to increase when the amount of movement during focusing is close, but at the wide-angle end, when the object distance fluctuates from infinity to a short distance. Since the amount of focus movement is small, the effect on the size of the entire system is small.
  • the amount of movement of the positive lens group Fb1 is large at the telephoto end, the amount of movement during focusing can be reduced, so that the fluctuation of the axial luminous flux diameter incident on the positive lens group Fb1 is small and the fluctuation of spherical aberration is suppressed. It's easy to do. Further, since the variation of curvature of field and the variation of distortion are smaller at the telephoto end than at the wide-angle end, there is little adverse effect due to the small amount of movement of the negative lens group Fb2.
  • the positive lens group Fb1 and the negative lens group Fb2 are adjacent to each other, and the negative lens group Fb2 is arranged on the image plane side of the positive lens group Fb1.
  • the positive lens group Fb1 and the negative lens group Fb2 are placed next to each other and the negative lens group Fb2 is arranged on the image plane side of the positive lens group Fb1, the off-axis light passing through the negative lens group Fb2 is higher than the positive lens group Fb1.
  • the zoom lens according to the embodiment satisfies the following conditional expression (3).
  • fFb1 Focal length of the positive lens group
  • fFb2 Focal length of the negative lens group Fb2.
  • Conditional expression (3) defines the ratio between the focal length of the positive lens group Fb1 and the focal length of the negative lens group Fb2. If it is within the upper limit of the conditional expression (3), the amount of movement during focusing at the wide-angle end can be reduced, and if it is within the lower limit of the conditional expression (3), the curvature of field and distortion at a short distance are corrected at the wide-angle end. Becomes easier.
  • conditional expression (3) In order to better realize the effect of the conditional expression (3) described above, it is more desirable to set the numerical range of the conditional expression (3) as shown in the following conditional expression (3A). 0.8 ⁇
  • ⁇ 2.3 > (3A)
  • the zoom lens according to the embodiment satisfies the following conditional expression (4).
  • fFb1 Focal length of the positive lens group
  • Fb1 ft Focal length of the entire system at the telephoto end.
  • Conditional expression (4) defines the focal length of the positive lens group Fb1. If it is within the upper limit of the conditional expression (4), the amount of movement during focusing at the telephoto end can be made small, and if it is within the lower limit, it becomes easy to correct spherical aberration at a short distance.
  • the zoom lens according to the embodiment satisfies the following conditional expression (5). 0.9 ⁇
  • ⁇ 3.4 > (5)
  • f1 Focal length of the first lens group B1
  • fw Focal length of the entire system at the wide-angle end.
  • Conditional expression (5) defines the focal length of the first lens group B1. If it is within the upper limit of the conditional expression (5), the distortion aberration can be easily corrected at the wide-angle end, and if it is within the lower limit, the front lens diameter (lens diameter on the most object side) can be easily reduced.
  • conditional expression (5) In order to better realize the effect of the conditional expression (5) described above, it is more desirable to set the numerical range of the conditional expression (5) as shown in the following conditional expression (5A). 1.2 ⁇
  • ⁇ 2.6 > (5A)
  • the zoom lens according to the embodiment satisfies the following conditional expression (6).
  • fpt Focal length of the intermediate lens group Bm at the telephoto end
  • ft Focal length of the entire system at the telephoto end.
  • Conditional expression (6) defines the focal length of the optical system Bm arranged between the first lens group B1 and the normal lens group Fb1 at the telephoto end, and if it is within the upper limit, the focus group at the telephoto end. If it is within the lower limit, it becomes easy to correct spherical aberration at the telephoto end.
  • conditional expression (6) In order to better realize the effect of the conditional expression (6) described above, it is more desirable to set the numerical range of the conditional expression (6) as shown in the following conditional expression (6A). 1.3 ⁇ fpt / ft ⁇ 2.5 ?? (6A)
  • the intermediate lens group Bm has an aperture diaphragm STP near the object side, near the image plane side, or inside.
  • the front lens diameter or the rear lens diameter is unlikely to be significantly increased, so that the size of the entire optical system can be easily suppressed.
  • the subsequent group further includes at least two lens groups having a positive synthetic focal length on the image plane side of the negative lens group Fb2 during zooming, and the following conditional expression ( It is desirable to satisfy 7).
  • the at least two lens groups are, for example, the fifth lens group B5 and the sixth lens group B6 in the configuration examples of FIGS. 1 and 2. Further, for example, in the configuration examples of FIGS. 7 and 8, the fifth lens group B5, the sixth lens group B6, and the seventh lens group B7. 4.6 ⁇ frw / fw ⁇ 29.0 ...... (7)
  • frw Focal length at the wide-angle end of at least two lens groups
  • fw Focal length of the entire system at the wide-angle end.
  • At least two lens groups having a positive combined focal length at all times during zooming may be arranged on the image plane side of the negative lens group Fb2, and an appropriate back focus may be secured if the condition equation (7) is satisfied. If it is within the upper limit of the conditional expression (7), it becomes easy to secure the distance between the image sensor and the final lens, and if it is within the lower limit, it becomes easy to shorten the total length of the lens.
  • conditional expression (7) it is more desirable to set the numerical range of the conditional expression (7) as shown in the following conditional expression (7A). 6.1 ⁇ frw / fw ⁇ 23.0 ; (7A)
  • the succeeding group further includes at least two lens groups arranged on the image plane side of the negative lens group Fb2 and moving in different trajectories during zooming.
  • the at least two lens groups are, for example, the fifth lens group B5 and the sixth lens group B6 in the configuration examples of FIGS. 1 and 2. Further, for example, in the configuration examples of FIGS. 7 and 8, the fifth lens group B5, the sixth lens group B6, and the seventh lens group B7. If at least two lens groups that move in different trajectories during zooming are arranged on the image plane side of the negative lens group Fb2, it may be easy to correct the curvature of field variation due to zooming.
  • the intermediate lens group Bm is a single lens group. If the intermediate lens group Bm arranged between the first lens group B1 and the normal lens group Fb1 is made into a single lens group, the mechanism in the vicinity of the aperture diaphragm STP having a relatively complicated structure is simplified. Since it can be made smaller, it may contribute to the overall miniaturization.
  • the intermediate lens group Bm moves toward the object so that the distance from the first lens group B1 becomes small, and is a positive lens.
  • the group Fb1 moves toward the object so that the distance from the intermediate lens group Bm becomes smaller, and the negative lens group Fb2 moves toward the object while changing the distance from the positive lens group Fb1. It is desirable that the lens group arranged most on the object side moves toward the object side while changing the distance from the negative lens group Fb2.
  • the intermediate lens group Bm When zooming from the wide-angle end to the telephoto end, if the intermediate lens group Bm is moved toward the object so that the distance from the first lens group B1 becomes small, the first lens group B1 which is relatively large can be used. It is good because the amount of movement can be reduced and the zoom operation becomes smooth. If the positive lens group Fb1 is moved toward the object while changing the distance from the intermediate lens group Bm, it may be easier to correct the fluctuation of spherical aberration due to zooming. If the negative lens group Fb2 is moved toward the object while changing the distance from the positive lens group Fb1, it becomes easier to set the positive lens group Fb1 and the negative lens group Fb2 to an appropriate focus sensitivity at each focal length. good. If the lens group arranged on the image plane side of the negative lens group Fb2 is moved to the object side while changing the distance from the negative lens group Fb2, it may be easier to correct the curvature of field variation due to zooming. ..
  • moving the intermediate lens group Bm integrally with any lens group arranged on the image plane side of the negative lens group Fb2 further simplifies the mechanism and contributes to overall miniaturization. It's okay.
  • a flare cutter (secondary aperture) FC is placed on the object side of the intermediate lens group Bm, the coma flare may be removed.
  • FIG. 49 shows a configuration example of the image pickup apparatus 100 to which the zoom lens according to the embodiment is applied.
  • the image pickup device 100 is, for example, a digital still camera, and includes a camera block 10, a camera signal processing unit 20, an image processing unit 30, an LCD (Liquid Crystal Display) 40, and an R / W (reader / writer) 50. , CPU (Central Processing Unit) 60, an input unit 70, and a lens drive control unit 80.
  • CPU Central Processing Unit
  • the camera block 10 is responsible for an image pickup function, and has a zoom lens including an image pickup lens 11 and an image pickup element 12 such as a CCD (Charge Coupled Devices) or a CMOS (Complementary Metal Oxide Semiconductor).
  • the image pickup device 12 converts the optical image formed by the image pickup lens 11 into an electric signal, thereby outputting an image pickup signal (image signal) corresponding to the optical image.
  • the zoom lenses 1 to 6 according to the configuration examples shown in FIGS. 1 to 12 can be applied.
  • the camera signal processing unit 20 performs various signal processing such as analog-to-digital conversion, noise removal, image quality correction, and conversion to a brightness / color difference signal on the image signal output from the image pickup element 12.
  • the image processing unit 30 performs recording / reproduction processing of an image signal, and performs compression coding / decompression decoding processing of an image signal based on a predetermined image data format, conversion processing of data specifications such as resolution, and the like. It has become.
  • the LCD 40 has a function of displaying various data such as an operation state of the user's input unit 70 and a captured image.
  • the R / W 50 writes the image data encoded by the image processing unit 30 to the memory card 1000 and reads out the image data recorded on the memory card 1000.
  • the memory card 1000 is, for example, a semiconductor memory that can be attached to and detached from a slot connected to the R / W 50.
  • the CPU 60 functions as a control processing unit that controls each circuit block provided in the image pickup apparatus 100, and controls each circuit block based on an instruction input signal or the like from the input unit 70.
  • the input unit 70 includes various switches and the like for which a required operation is performed by the user.
  • the input unit 70 is composed of, for example, a shutter release button for performing a shutter operation, a selection switch for selecting an operation mode, and the like, and outputs an instruction input signal according to the operation by the user to the CPU 60.
  • the lens drive control unit 80 controls the drive of the lens arranged in the camera block 10, and controls a motor or the like (not shown) that drives each lens of the image pickup lens 11 based on a control signal from the CPU 60. It has become.
  • the image signal shot in the camera block 10 is output to the LCD 40 via the camera signal processing unit 20 and displayed as a camera-through image. Further, for example, when an instruction input signal for zooming or focusing is input from the input unit 70, the CPU 60 outputs a control signal to the lens drive control unit 80, and the image pickup lens 11 is controlled by the lens drive control unit 80. The predetermined lens moves.
  • the captured image signal is output from the camera signal processing unit 20 to the image processing unit 30 and subjected to compression coding processing to obtain a predetermined image signal. Converted to digital data in data format. The converted data is output to the R / W 50 and written to the memory card 1000.
  • the lens drive control unit 80 is based on a control signal from the CPU 60. This is done by moving a predetermined lens of the image pickup lens 11.
  • the R / W 50 reads out the predetermined image data from the memory card 1000 in response to the operation on the input unit 70, and the image processing unit 30 decompresses and decodes the predetermined image data. After the processing is performed, the reproduced image signal is output to the LCD 40 and the reproduced image is displayed.
  • the image pickup device is applied to a digital still camera or the like, but the application range of the image pickup device is not limited to the digital still camera, and is applied to various other image pickup devices. It is possible. For example, it can be applied to a digital single-lens reflex camera, a digital non-reflex camera, a digital video camera, a surveillance camera, and the like. Further, it can be widely applied as a camera unit of a digital input / output device such as a mobile phone having a built-in camera or an information terminal having a built-in camera. It can also be applied to cameras with interchangeable lenses.
  • Si indicates the number of the i-th surface, which is coded so as to gradually increase from the object side.
  • Ri indicates the value (mm) of the radius of curvature of the paraxial axis of the i-th plane.
  • Di indicates the value (mm) of the distance on the optical axis between the i-th surface and the i + 1-th surface.
  • Ndi indicates the value of the refractive index of the material of the optical element having the i-th plane with respect to the d-line (wavelength 587.6 nm).
  • ⁇ di indicates the value of the Abbe number in the d-line of the material of the optical element having the i-th plane. “ ⁇ i” indicates the value (mm) of the effective diameter or the diaphragm diameter of the i-th surface.
  • the part where the value of "ri” is “ ⁇ ” indicates a flat surface, a diaphragm surface, or the like.
  • ASP in the surface number (Si) column indicates that the surface has an aspherical shape.
  • STP in the surface number column indicates that the aperture diaphragm (main diaphragm) STP is arranged at the corresponding position.
  • FC in the surface number column indicates that the flare cutter (secondary aperture) FC is arranged at the corresponding position.
  • OJ in the surface number column indicates that the surface is an object surface.
  • IP in the surface number column indicates that the surface is an image plane IP.
  • F indicates the focal length of the entire system (unit: mm).
  • Fno indicates an open F value (F number).
  • ⁇ indicates a half angle of view (unit: °).
  • Y indicates the image height (unit: mm).
  • L indicates the total optical length (distance on the optical axis from the surface closest to the object to the image plane IP) (unit: mm).
  • some lenses used in each embodiment have a lens surface formed of an aspherical surface.
  • the aspherical shape is defined by the following equation.
  • "Ei” represents an exponential notation with a base of 10, that is, “10- i ".
  • "0.12345E-05” is “0.12345E-05”. It represents "0.12345 x 10-5".
  • [Table 1] shows the basic lens data of the zoom lens 1 according to the first embodiment shown in FIGS. 1 and 2.
  • [Table 2] shows the start surface and the focal length (unit: mm) of each group of the zoom lens 1 according to the first embodiment.
  • [Table 3] shows the values of the focal length f, F value, total angle of view (2 ⁇ ), image height Y, and optical total length L of the entire system in the zoom lens 1 according to the first embodiment.
  • [Table 3] shows the values at infinity focusing for each of the wide-angle end (Wide), the intermediate focal length (Mid), and the telephoto end (Tele).
  • [Table 4] shows data on the surface spacing that is variable during zooming and data on the effective diameter (aperture diameter) that is variable during zooming in the zoom lens 1 according to the first embodiment.
  • the values at the wide-angle end (Wide), the intermediate focal length (Mid), and the telephoto end (Tele) when the object distance (d0) is infinity and short distance are shown. Is shown.
  • [Table 5] shows the values of the coefficients representing the shape of the aspherical surface in the zoom lens 1 according to the first embodiment.
  • the zoom lens 1 according to the first embodiment includes a first lens group B1 having a negative refractive power and a subsequent group in this order from the object side to the image plane side.
  • Subsequent groups include a second lens group B2 having a positive refractive power, a third lens group B3 having a positive refractive power, a fourth lens group B4 having a negative refractive power, and a third lens group having a negative refractive power. It is composed of a 5 lens group B5 and a 6th lens group B6 having a positive refractive power.
  • the zoom lens 1 according to the first embodiment has a six-group configuration as a whole.
  • the second lens group B2 corresponds to the intermediate lens group Bm
  • the third lens group B3 corresponds to the positive lens group Fb1
  • the fourth lens group B4 corresponds to the negative lens group Fb2. do.
  • the aperture stop STP is arranged inside the intermediate lens group Bm.
  • the flare cutter (secondary diaphragm) FC is arranged near the object side of the intermediate lens group Bm.
  • the first lens group B1 moves to the image plane side when zooming from the wide-angle end to the telephoto end.
  • the second lens group B2 moves toward the object while keeping the distance from the first lens group B1 small.
  • the third lens group B3 moves toward the object while keeping the distance from the second lens group B2 small.
  • the fourth lens group B4 moves toward the object while increasing the distance from the third lens group B3.
  • the fifth lens group B5 moves toward the object while keeping the distance from the fourth lens group B4 large up to the intermediate focal length and small thereafter.
  • the sixth lens group B6 moves toward the object while increasing the distance from the fifth lens group B5.
  • the third lens group B3 moves integrally with the fifth lens group B5, the aperture stop STP moves integrally with the third lens group B3, and the flare cutter FC moves independently.
  • the third lens group B3 (positive lens group Fb1) and the fourth lens group B4 (negative lens group Fb2) move toward the object at different speeds.
  • FIG. 13 shows various aberrations at the wide-angle end and infinity focusing of the zoom lens 1 according to the first embodiment.
  • FIG. 14 shows various aberrations of the zoom lens 1 according to the first embodiment at an intermediate focal length and infinity focusing.
  • FIG. 15 shows various aberrations of the zoom lens 1 according to the first embodiment at the telephoto end and at infinity in focus.
  • FIG. 16 shows various aberrations at the wide-angle end and short-range focusing of the zoom lens 1 according to the first embodiment.
  • FIG. 17 shows various aberrations of the zoom lens 1 according to the first embodiment at an intermediate focal length and a short-distance focusing.
  • FIG. 18 shows various aberrations of the zoom lens 1 according to the first embodiment at the telephoto end and at the time of short-range focusing.
  • 13 to 8 show spherical aberration, astigmatism (curvature of field), and distortion as various aberrations.
  • the solid line shows the value on the d line (587.56 nm)
  • the alternate long and short dash line shows the value on the g line (435.84 nm)
  • the broken line shows the value on the C line (656.27 nm).
  • S indicates a value in the sagittal image plane
  • T indicates a value in the tangential image plane.
  • the distortion diagram shows the value on the d-line. The same applies to the aberration diagrams in the other examples thereafter.
  • the zoom lens 1 according to the first embodiment has various aberrations satisfactorily corrected and has excellent imaging performance.
  • [Table 6] shows the basic lens data of the zoom lens 2 according to the second embodiment shown in FIGS. 3 and 4.
  • [Table 7] shows the start surface and the focal length (unit: mm) of each group of the zoom lens 2 according to the second embodiment.
  • [Table 8] shows the values of the focal length f, F value, total angle of view (2 ⁇ ), image height Y, and optical total length L of the entire system in the zoom lens 2 according to the second embodiment. Note that [Table 8] shows the values at the infinity focus for each of the wide-angle end (Wide), the intermediate focal length (Mid), and the telephoto end (Tele).
  • [Table 9] shows data on the surface spacing that is variable during zooming and data on the effective diameter (aperture diameter) that is variable during zooming in the zoom lens 2 according to the second embodiment.
  • the values at the wide-angle end (Wide), the intermediate focal length (Mid), and the telephoto end (Tele) when the object distance (d0) is infinity and short distance are shown. Is shown.
  • [Table 10] shows the values of the coefficients representing the shape of the aspherical surface in the zoom lens 2 according to the second embodiment.
  • the zoom lens 2 according to the second embodiment includes a first lens group B1 having a negative refractive power and a subsequent group in this order from the object side to the image plane side.
  • Subsequent groups include a second lens group B2 having a positive refractive power, a third lens group B3 having a positive refractive power, a fourth lens group B4 having a negative refractive power, and a third lens group having a negative refractive power. It is composed of a 5 lens group B5 and a 6th lens group B6 having a positive refractive power.
  • the zoom lens 2 according to the second embodiment has a six-group configuration as a whole.
  • the second lens group B2 corresponds to the intermediate lens group Bm
  • the third lens group B3 corresponds to the positive lens group Fb1
  • the fourth lens group B4 corresponds to the negative lens group Fb2. do.
  • the aperture stop STP is arranged inside the intermediate lens group Bm.
  • the flare cutter (secondary diaphragm) FC is arranged near the object side of the intermediate lens group Bm.
  • the first lens group B1 moves to the image plane side when zooming from the wide-angle end to the telephoto end.
  • the second lens group B2 moves toward the object while keeping the distance from the first lens group B1 small.
  • the third lens group B3 moves toward the object while keeping the distance from the second lens group B2 small.
  • the fourth lens group B4 moves toward the object while increasing the distance from the third lens group B3.
  • the fifth lens group B5 moves toward the object while keeping the distance from the fourth lens group B4 small.
  • the sixth lens group B6 moves toward the object while increasing the distance from the fifth lens group B5.
  • the third lens group B3 moves integrally with the fifth lens group B5, and the aperture stop STP and the flare cutter FC move integrally with the third lens group B3.
  • the third lens group B3 (positive lens group Fb1) and the fourth lens group B4 (negative lens group Fb2) move toward the object at different speeds.
  • FIG. 19 shows various aberrations at the wide-angle end and infinity focusing of the zoom lens 2 according to the second embodiment.
  • FIG. 20 shows various aberrations of the zoom lens 2 according to the second embodiment at an intermediate focal length and infinity focusing.
  • FIG. 21 shows various aberrations of the zoom lens 2 according to the second embodiment at the telephoto end and at infinity in focus.
  • FIG. 22 shows various aberrations at the wide-angle end and short-range focusing of the zoom lens 2 according to the second embodiment.
  • FIG. 23 shows various aberrations of the zoom lens 2 according to the second embodiment at an intermediate focal length and a short-distance focusing.
  • FIG. 24 shows various aberrations of the zoom lens 2 according to the second embodiment at the telephoto end and at the time of short-range focusing.
  • the zoom lens 2 according to the second embodiment has various aberrations satisfactorily corrected and has excellent imaging performance.
  • [Table 11] shows the basic lens data of the zoom lens 3 according to the third embodiment shown in FIGS. 5 and 6.
  • [Table 12] shows the start surface and the focal length (unit: mm) of each group of the zoom lens 3 according to the third embodiment.
  • [Table 13] shows the values of the focal length f, F value, total angle of view (2 ⁇ ), image height Y, and optical total length L of the entire system in the zoom lens 3 according to the third embodiment.
  • [Table 13] shows the values at infinity focusing for each of the wide-angle end (Wide), the intermediate focal length (Mid), and the telephoto end (Tele).
  • [Table 14] shows data on the surface spacing that is variable during zooming and data on the effective diameter (aperture diameter) that is variable during zooming in the zoom lens 3 according to the third embodiment.
  • the values at the wide-angle end (Wide), the intermediate focal length (Mid), and the telephoto end (Tele) when the object distance (d0) is infinity and short distance are shown. Is shown.
  • [Table 15] shows the values of the coefficients representing the shape of the aspherical surface in the zoom lens 3 according to the third embodiment.
  • the zoom lens 3 according to the third embodiment includes a first lens group B1 having a negative refractive power and a subsequent group in this order from the object side to the image plane side.
  • Subsequent groups include a second lens group B2 having a positive refractive power, a third lens group B3 having a positive refractive power, a fourth lens group B4 having a negative refractive power, and a third lens group having a positive refractive power. It is composed of a 5 lens group B5 and a 6th lens group B6 having a positive refractive power.
  • the zoom lens 3 according to the third embodiment has a six-group configuration as a whole.
  • the second lens group B2 corresponds to the intermediate lens group Bm
  • the third lens group B3 corresponds to the positive lens group Fb1
  • the fourth lens group B4 corresponds to the negative lens group Fb2. do.
  • the aperture stop STP is arranged inside the intermediate lens group Bm.
  • the flare cutter (secondary diaphragm) FC is arranged near the object side of the intermediate lens group Bm.
  • the first lens group B1 moves to the image plane side when zooming from the wide-angle end to the telephoto end.
  • the second lens group B2 moves toward the object while keeping the distance from the first lens group B1 small.
  • the third lens group B3 moves toward the object while keeping the distance from the second lens group B2 small.
  • the fourth lens group B4 moves toward the object while increasing the distance from the third lens group B3.
  • the fifth lens group B5 moves toward the object while increasing the distance from the fourth lens group B4.
  • the sixth lens group B6 moves toward the object while increasing the distance from the fifth lens group B5.
  • the third lens group B3 moves integrally with the fifth lens group B5, and the aperture stop STP and the flare cutter FC move integrally with the third lens group B3.
  • the third lens group B3 (positive lens group Fb1) and the fourth lens group B4 (negative lens group Fb2) move toward the object at different speeds.
  • FIG. 25 shows various aberrations at the wide-angle end and infinity focusing of the zoom lens 3 according to the third embodiment.
  • FIG. 26 shows various aberrations of the zoom lens 3 according to the third embodiment at an intermediate focal length and infinity focusing.
  • FIG. 27 shows various aberrations of the zoom lens 3 according to the third embodiment at the telephoto end and at infinity in focus.
  • FIG. 28 shows various aberrations at the wide-angle end and short-range focusing of the zoom lens 3 according to the third embodiment.
  • FIG. 29 shows various aberrations at the time of intermediate focal length and short-distance focusing of the zoom lens 3 according to the third embodiment.
  • FIG. 30 shows various aberrations of the zoom lens 3 according to the third embodiment at the telephoto end and at the time of short-range focusing.
  • the zoom lens 3 according to the third embodiment has various aberrations satisfactorily corrected and has excellent imaging performance.
  • [Table 16] shows the basic lens data of the zoom lens 4 according to the fourth embodiment shown in FIGS. 7 and 8.
  • [Table 17] shows the start surface and the focal length (unit: mm) of each group of the zoom lens 4 according to the fourth embodiment.
  • [Table 18] shows the values of the focal length f, F value, total angle of view (2 ⁇ ), image height Y, and optical total length L of the entire system in the zoom lens 4 according to the fourth embodiment. Note that [Table 18] shows the values at the infinity focus for each of the wide-angle end (Wide), the intermediate focal length (Mid), and the telephoto end (Tele).
  • [Table 19] shows data on the surface spacing that is variable during zooming and data on the effective diameter (aperture diameter) that is variable during zooming in the zoom lens 4 according to the fourth embodiment.
  • the values at the wide-angle end (Wide), the intermediate focal length (Mid), and the telephoto end (Tele) when the object distance (d0) is infinity and short distance are shown. Is shown.
  • [Table 20] shows the values of the coefficients representing the shape of the aspherical surface in the zoom lens 4 according to the fourth embodiment.
  • the zoom lens 4 according to the fourth embodiment includes a first lens group B1 having a negative refractive power and a subsequent group in this order from the object side to the image plane side.
  • Subsequent groups include a second lens group B2 having a positive refractive power, a third lens group B3 having a positive refractive power, a fourth lens group B4 having a negative refractive power, and a third lens group having a positive refractive power. It is composed of a 5 lens group B5, a 6th lens group B6 having a negative refractive power, and a 7th lens group B7 having a positive refractive power.
  • the zoom lens 4 according to the fourth embodiment has a seven-group configuration as a whole.
  • the second lens group B2 corresponds to the intermediate lens group Bm
  • the third lens group B3 corresponds to the positive lens group Fb1
  • the fourth lens group B4 corresponds to the negative lens group Fb2. do.
  • the aperture stop STP is arranged inside the intermediate lens group Bm.
  • the flare cutter (secondary diaphragm) FC is arranged near the object side of the intermediate lens group Bm.
  • the first lens group B1 moves to the image plane side when zooming from the wide-angle end to the telephoto end.
  • the second lens group B2 moves toward the object while keeping the distance from the first lens group B1 small.
  • the third lens group B3 moves toward the object while keeping the distance from the second lens group B2 small.
  • the fourth lens group B4 moves toward the object while increasing the distance from the third lens group B3.
  • the fifth lens group B5 moves toward the object while keeping the distance from the fourth lens group B4 large up to the intermediate focal length and small thereafter.
  • the sixth lens group B6 moves toward the object while increasing the distance from the fifth lens group B5.
  • the seventh lens group B7 moves toward the object while increasing the distance from the sixth lens group B6.
  • the third lens group B3 moves integrally with the fifth lens group B5, and the aperture stop STP and the flare cutter FC move integrally with the third lens group B3.
  • the third lens group B3 (positive lens group Fb1) and the fourth lens group B4 (negative lens group Fb2) move toward the object at different speeds.
  • FIG. 31 shows various aberrations at the wide-angle end and infinity focusing of the zoom lens 4 according to the fourth embodiment.
  • FIG. 32 shows various aberrations of the zoom lens 4 according to the fourth embodiment at an intermediate focal length and infinity focusing.
  • FIG. 33 shows various aberrations of the zoom lens 4 according to the fourth embodiment at the telephoto end and at infinity in focus.
  • FIG. 34 shows various aberrations at the wide-angle end and short-range focusing of the zoom lens 4 according to the fourth embodiment.
  • FIG. 35 shows various aberrations at the time of intermediate focal length and short-distance focusing of the zoom lens 4 according to the fourth embodiment.
  • FIG. 36 shows various aberrations of the zoom lens 4 according to the fourth embodiment at the telephoto end and at the time of short-range focusing.
  • the zoom lens 4 according to the fourth embodiment has various aberrations satisfactorily corrected and has excellent imaging performance.
  • [Table 21] shows the basic lens data of the zoom lens 5 according to the fifth embodiment shown in FIGS. 9 and 10.
  • [Table 22] shows the start surface and the focal length (unit: mm) of each group of the zoom lens 5 according to the fifth embodiment.
  • [Table 23] shows the values of the focal length f, F value, total angle of view (2 ⁇ ), image height Y, and optical total length L of the entire system in the zoom lens 5 according to the fifth embodiment.
  • [Table 23] shows the values at infinity focusing for each of the wide-angle end (Wide), the intermediate focal length (Mid), and the telephoto end (Tele).
  • [Table 24] shows data on the surface spacing that is variable during zooming and data on the effective diameter (aperture diameter) that is variable during zooming in the zoom lens 5 according to the fifth embodiment.
  • the values at the wide-angle end (Wide), the intermediate focal length (Mid), and the telephoto end (Tele) when the object distance (d0) is infinity and short distance are shown. Is shown.
  • [Table 20] shows the values of the coefficients representing the shape of the aspherical surface in the zoom lens 5 according to the fifth embodiment.
  • the zoom lens 5 according to the fifth embodiment includes a first lens group B1 having a negative refractive power and a subsequent group in this order from the object side to the image plane side.
  • Subsequent groups include a second lens group B2 having a positive refractive power, a third lens group B3 having a positive refractive power, a fourth lens group B4 having a negative refractive power, and a third lens group having a negative refractive power. It is composed of a 5 lens group B5 and a 6th lens group B6 having a positive refractive power.
  • the zoom lens 5 according to the fifth embodiment has a six-group configuration as a whole.
  • the second lens group B2 corresponds to the intermediate lens group Bm
  • the third lens group B3 corresponds to the positive lens group Fb1
  • the fourth lens group B4 corresponds to the negative lens group Fb2. do.
  • the aperture stop STP is arranged near the object side of the intermediate lens group Bm.
  • the flare cutter (secondary diaphragm) FC is arranged inside the intermediate lens group Bm.
  • the first lens group B1 moves to the image plane side when zooming from the wide-angle end to the telephoto end.
  • the second lens group B2 moves toward the object while keeping the distance from the first lens group B1 small.
  • the third lens group B3 moves toward the object while keeping the distance from the second lens group B2 small.
  • the fourth lens group B4 moves toward the object while increasing the distance from the third lens group B3.
  • the fifth lens group B5 moves toward the object while keeping the distance from the fourth lens group B4 small.
  • the sixth lens group B6 moves toward the object while increasing the distance from the fifth lens group B5.
  • the third lens group B3 moves integrally with the fifth lens group B5, and the aperture stop STP and the flare cutter FC move integrally with the third lens group B3.
  • the third lens group B3 (positive lens group Fb1) and the fourth lens group B4 (negative lens group Fb2) move toward the object at different speeds.
  • FIG. 37 shows various aberrations at the wide-angle end and infinity focusing of the zoom lens 5 according to the fifth embodiment.
  • FIG. 38 shows various aberrations of the zoom lens 5 according to the fifth embodiment at an intermediate focal length and infinity focusing.
  • FIG. 39 shows various aberrations of the zoom lens 5 according to the fifth embodiment at the telephoto end and at infinity in focus.
  • FIG. 40 shows various aberrations at the wide-angle end and short-range focusing of the zoom lens 5 according to the fifth embodiment.
  • FIG. 41 shows various aberrations of the zoom lens 5 according to the fifth embodiment at an intermediate focal length and a short-distance focusing.
  • FIG. 42 shows various aberrations of the zoom lens 5 according to the fifth embodiment at the telephoto end and at the time of short-range focusing.
  • the zoom lens 5 according to the fifth embodiment has various aberrations satisfactorily corrected and has excellent imaging performance.
  • [Table 26] shows the basic lens data of the zoom lens 6 according to the sixth embodiment shown in FIGS. 11 and 12.
  • [Table 27] shows the start surface and the focal length (unit: mm) of each group of the zoom lens 6 according to the sixth embodiment.
  • [Table 28] shows the values of the focal length f, F value, total angle of view (2 ⁇ ), image height Y, and optical total length L of the entire system in the zoom lens 6 according to the sixth embodiment.
  • [Table 28] shows the values at infinity focusing for each of the wide-angle end (Wide), the intermediate focal length (Mid), and the telephoto end (Tele).
  • [Table 29] shows data on the surface spacing that is variable during zooming and data on the effective diameter (aperture diameter) that is variable during zooming in the zoom lens 6 according to the sixth embodiment.
  • [Table 30] shows the values at the wide-angle end (Wide), the intermediate focal length (Mid), and the telephoto end (Tele) when the object distance (d0) is infinity and short distance. Is shown.
  • [Table 30] shows the values of the coefficients representing the shape of the aspherical surface in the zoom lens 6 according to the sixth embodiment.
  • the zoom lens 6 according to the sixth embodiment includes a first lens group B1 having a negative refractive power and a subsequent group in this order from the object side to the image plane side.
  • Subsequent groups include a second lens group B2 having a positive refractive power, a third lens group B3 having a positive refractive power, a fourth lens group B4 having a negative refractive power, and a third lens group having a negative refractive power. It is composed of a 5 lens group B5 and a 6th lens group B6 having a positive refractive power.
  • the zoom lens 6 according to the sixth embodiment has a six-group configuration as a whole.
  • the second lens group B2 corresponds to the intermediate lens group Bm
  • the third lens group B3 corresponds to the positive lens group Fb1
  • the fourth lens group B4 corresponds to the negative lens group Fb2. do.
  • the aperture stop STP is arranged near the image plane side of the intermediate lens group Bm.
  • the flare cutter (secondary diaphragm) FC is arranged near the object side of the intermediate lens group Bm.
  • the first lens group B1 moves to the image plane side when zooming from the wide-angle end to the telephoto end.
  • the second lens group B2 moves toward the object while keeping the distance from the first lens group B1 small.
  • the third lens group B3 moves toward the object while keeping the distance from the second lens group B2 small.
  • the fourth lens group B4 moves toward the object while increasing the distance from the third lens group B3.
  • the fifth lens group B5 moves toward the object while keeping the distance from the fourth lens group B4 small.
  • the sixth lens group B6 moves toward the object while increasing the distance from the fifth lens group B5.
  • the third lens group B3 moves integrally with the fifth lens group B5, and the aperture stop STP and the flare cutter FC move integrally with the third lens group B3.
  • the third lens group B3 (positive lens group Fb1) and the fourth lens group B4 (negative lens group Fb2) move toward the object at different speeds.
  • FIG. 43 shows various aberrations at the wide-angle end and infinity focusing of the zoom lens 6 according to the sixth embodiment.
  • FIG. 44 shows various aberrations of the zoom lens 6 according to the sixth embodiment at an intermediate focal length and infinity focusing.
  • FIG. 45 shows various aberrations of the zoom lens 6 according to the sixth embodiment at the telephoto end and at infinity in focus.
  • FIG. 46 shows various aberrations at the wide-angle end and short-range focusing of the zoom lens 6 according to the sixth embodiment.
  • FIG. 47 shows various aberrations of the zoom lens 6 according to the sixth embodiment at an intermediate focal length and a short-distance focusing.
  • FIG. 48 shows various aberrations of the zoom lens 6 according to the sixth embodiment at the telephoto end and at the time of short-range focusing.
  • the zoom lens 6 according to the sixth embodiment has various aberrations satisfactorily corrected and has excellent imaging performance.
  • [Other numerical data of each embodiment] [Table 31] shows the values related to each of the above conditional expressions summarized for each embodiment. As can be seen from [Table 31], the values of each embodiment are within the numerical range for each conditional expression.
  • the technology according to the present disclosure can be applied to various products.
  • the technology according to the present disclosure includes any type of movement such as automobiles, electric vehicles, hybrid electric vehicles, motorcycles, bicycles, personal mobility, airplanes, drones, ships, robots, construction machines, agricultural machines (tractors), and the like. It may be realized as a device mounted on the body.
  • FIG. 50 is a block diagram showing a schematic configuration example of a vehicle control system 7000, which is an example of a mobile control system to which the technique according to the present disclosure can be applied.
  • the vehicle control system 7000 includes a plurality of electronic control units connected via the communication network 7010.
  • the vehicle control system 7000 includes a drive system control unit 7100, a body system control unit 7200, a battery control unit 7300, an external information detection unit 7400, an in-vehicle information detection unit 7500, and an integrated control unit 7600. ..
  • the communication network 7010 connecting these plurality of control units conforms to any standard such as CAN (Controller Area Network), LIN (Local Interconnect Network), LAN (Local Area Network) or FlexRay (registered trademark). It may be an in-vehicle communication network.
  • CAN Controller Area Network
  • LIN Local Interconnect Network
  • LAN Local Area Network
  • FlexRay registered trademark
  • Each control unit includes a microcomputer that performs arithmetic processing according to various programs, a storage unit that stores a program executed by the microcomputer or parameters used for various arithmetics, and a drive circuit that drives various control target devices. To be equipped.
  • Each control unit is provided with a network I / F for communicating with other control units via the communication network 7010, and is provided by wired communication or wireless communication with devices or sensors inside or outside the vehicle. A communication I / F for performing communication is provided. In FIG.
  • control unit 7600 as the functional configuration of the integrated control unit 7600, the microcomputer 7610, the general-purpose communication I / F 7620, the dedicated communication I / F 7630, the positioning unit 7640, the beacon receiving unit 7650, the in-vehicle device I / F 7660, the audio image output unit 7670, The vehicle-mounted network I / F 7680 and the storage unit 7690 are shown.
  • Other control units also include a microcomputer, a communication I / F, a storage unit, and the like.
  • the drive system control unit 7100 controls the operation of the device related to the drive system of the vehicle according to various programs.
  • the drive system control unit 7100 provides a driving force generator for generating the driving force of the vehicle such as an internal combustion engine or a driving motor, a driving force transmission mechanism for transmitting the driving force to the wheels, and a steering angle of the vehicle. It functions as a control device such as a steering mechanism for adjusting and a braking device for generating a braking force of a vehicle.
  • the drive system control unit 7100 may have a function as a control device such as ABS (Antilock Brake System) or ESC (Electronic Stability Control).
  • the vehicle condition detection unit 7110 is connected to the drive system control unit 7100.
  • the vehicle state detection unit 7110 may include, for example, a gyro sensor that detects the angular velocity of the axial rotation motion of the vehicle body, an acceleration sensor that detects the acceleration of the vehicle, an accelerator pedal operation amount, a brake pedal operation amount, or steering wheel steering. Includes at least one of the sensors for detecting angular velocity, engine speed, wheel speed, and the like.
  • the drive system control unit 7100 performs arithmetic processing using a signal input from the vehicle state detection unit 7110 to control an internal combustion engine, a drive motor, an electric power steering device, a braking device, and the like.
  • the body system control unit 7200 controls the operation of various devices mounted on the vehicle body according to various programs.
  • the body system control unit 7200 functions as a keyless entry system, a smart key system, a power window device, or a control device for various lamps such as a head lamp, a back lamp, a brake lamp, a winker, or a fog lamp.
  • the body system control unit 7200 may be input with radio waves transmitted from a portable device that substitutes for the key or signals of various switches.
  • the body system control unit 7200 receives inputs of these radio waves or signals and controls a vehicle door lock device, a power window device, a lamp, and the like.
  • the battery control unit 7300 controls the secondary battery 7310, which is the power supply source of the drive motor, according to various programs. For example, information such as the battery temperature, the battery output voltage, or the remaining capacity of the battery is input to the battery control unit 7300 from the battery device including the secondary battery 7310. The battery control unit 7300 performs arithmetic processing using these signals to control the temperature of the secondary battery 7310 or the cooling device provided in the battery device.
  • the vehicle outside information detection unit 7400 detects information outside the vehicle equipped with the vehicle control system 7000.
  • the imaging unit 7410 and the vehicle exterior information detection unit 7420 is connected to the vehicle exterior information detection unit 7400.
  • the imaging unit 7410 includes at least one of a ToF (TimeOfFlight) camera, a stereo camera, a monocular camera, an infrared camera, and other cameras.
  • the vehicle exterior information detection unit 7420 is used to detect, for example, the current weather or an environment sensor for detecting the weather, or other vehicles, obstacles, pedestrians, etc. around the vehicle equipped with the vehicle control system 7000. At least one of the surrounding information detection sensors is included.
  • the environment sensor may be, for example, at least one of a raindrop sensor that detects rainy weather, a fog sensor that detects fog, a sunshine sensor that detects the degree of sunshine, and a snow sensor that detects snowfall.
  • the ambient information detection sensor may be at least one of an ultrasonic sensor, a radar device, and a LIDAR (Light Detection and Ranging, Laser Imaging Detection and Ranging) device.
  • the imaging unit 7410 and the vehicle exterior information detection unit 7420 may be provided as independent sensors or devices, or may be provided as a device in which a plurality of sensors or devices are integrated.
  • FIG. 51 shows an example of the installation positions of the imaging unit 7410 and the vehicle exterior information detection unit 7420.
  • the imaging units 7910, 7912, 7914, 7916, 7918 are provided, for example, at at least one of the front nose, side mirrors, rear bumpers, back door, and upper part of the windshield of the vehicle interior of the vehicle 7900.
  • the image pickup unit 7910 provided on the front nose and the image pickup section 7918 provided on the upper part of the windshield in the vehicle interior mainly acquire an image in front of the vehicle 7900.
  • the imaging units 7912 and 7914 provided in the side mirrors mainly acquire images of the side of the vehicle 7900.
  • the image pickup unit 7916 provided on the rear bumper or the back door mainly acquires an image of the rear of the vehicle 7900.
  • the imaging unit 7918 provided on the upper part of the windshield in the vehicle interior is mainly used for detecting a preceding vehicle, a pedestrian, an obstacle, a traffic light, a traffic sign, a lane, or the like.
  • FIG. 51 shows an example of the photographing range of each of the imaging units 7910, 7912, 7914, 7916.
  • the imaging range a indicates the imaging range of the imaging unit 7910 provided on the front nose
  • the imaging ranges b and c indicate the imaging ranges of the imaging units 7912 and 7914 provided on the side mirrors, respectively
  • the imaging range d indicates the imaging range d.
  • the imaging range of the imaging unit 7916 provided on the rear bumper or the back door is shown. For example, by superimposing the image data captured by the imaging units 7910, 7912, 7914, 7916, a bird's-eye view image of the vehicle 7900 as viewed from above can be obtained.
  • the vehicle exterior information detection units 7920, 7922, 7924, 7926, 7928, 7930 provided on the front, rear, side, corners of the vehicle 7900 and the upper part of the windshield in the vehicle interior may be, for example, an ultrasonic sensor or a radar device.
  • the vehicle exterior information detection units 7920, 7926, 7930 provided on the front nose, rear bumper, back door, and upper part of the windshield in the vehicle interior of the vehicle 7900 may be, for example, a lidar device.
  • These out-of-vehicle information detection units 7920 to 7930 are mainly used for detecting a preceding vehicle, a pedestrian, an obstacle, or the like.
  • the vehicle exterior information detection unit 7400 causes the image pickup unit 7410 to capture an image outside the vehicle and receives the captured image data. Further, the vehicle exterior information detection unit 7400 receives detection information from the connected vehicle exterior information detection unit 7420. When the vehicle exterior information detection unit 7420 is an ultrasonic sensor, a radar device, or a lidar device, the vehicle exterior information detection unit 7400 transmits ultrasonic waves, electromagnetic waves, or the like, and receives received reflected wave information.
  • the vehicle exterior information detection unit 7400 may perform object detection processing or distance detection processing such as a person, a vehicle, an obstacle, a sign, or a character on a road surface based on the received information.
  • the vehicle exterior information detection unit 7400 may perform an environment recognition process for recognizing rainfall, fog, road surface conditions, etc. based on the received information.
  • the vehicle outside information detection unit 7400 may calculate the distance to an object outside the vehicle based on the received information.
  • the vehicle exterior information detection unit 7400 may perform image recognition processing or distance detection processing for recognizing a person, a vehicle, an obstacle, a sign, a character on the road surface, or the like based on the received image data.
  • the vehicle exterior information detection unit 7400 performs processing such as distortion correction or alignment on the received image data, and synthesizes the image data captured by different imaging units 7410 to generate a bird's-eye view image or a panoramic image. May be good.
  • the vehicle exterior information detection unit 7400 may perform the viewpoint conversion process using the image data captured by different imaging units 7410.
  • the in-vehicle information detection unit 7500 detects the in-vehicle information.
  • a driver state detection unit 7510 that detects the driver's state is connected to the in-vehicle information detection unit 7500.
  • the driver state detection unit 7510 may include a camera that captures the driver, a biosensor that detects the driver's biological information, a microphone that collects sound in the vehicle interior, and the like.
  • the biosensor is provided on, for example, the seat surface or the steering wheel, and detects the biometric information of the passenger sitting on the seat or the driver holding the steering wheel.
  • the in-vehicle information detection unit 7500 may calculate the degree of fatigue or concentration of the driver based on the detection information input from the driver state detection unit 7510, and may determine whether the driver is dozing or not. You may.
  • the in-vehicle information detection unit 7500 may perform processing such as noise canceling processing on the collected audio signal.
  • the integrated control unit 7600 controls the overall operation in the vehicle control system 7000 according to various programs.
  • An input unit 7800 is connected to the integrated control unit 7600.
  • the input unit 7800 is realized by a device such as a touch panel, a button, a microphone, a switch or a lever, which can be input-operated by a passenger. Data obtained by recognizing the voice input by the microphone may be input to the integrated control unit 7600.
  • the input unit 7800 may be, for example, a remote control device using infrared rays or other radio waves, or an externally connected device such as a mobile phone or a PDA (Personal Digital Assistant) that supports the operation of the vehicle control system 7000. You may.
  • the input unit 7800 may be, for example, a camera, in which case the passenger can input information by gesture. Alternatively, data obtained by detecting the movement of the wearable device worn by the passenger may be input. Further, the input unit 7800 may include, for example, an input control circuit that generates an input signal based on the information input by the passenger or the like using the input unit 7800 and outputs the input signal to the integrated control unit 7600. By operating the input unit 7800, the passenger or the like inputs various data to the vehicle control system 7000 and instructs the processing operation.
  • the storage unit 7690 may include a ROM (Read Only Memory) for storing various programs executed by the microcomputer, and a RAM (Random Access Memory) for storing various parameters, calculation results, sensor values, and the like. Further, the storage unit 7690 may be realized by a magnetic storage device such as an HDD (Hard Disc Drive), a semiconductor storage device, an optical storage device, an optical magnetic storage device, or the like.
  • ROM Read Only Memory
  • RAM Random Access Memory
  • the general-purpose communication I / F 7620 is a general-purpose communication I / F that mediates communication with various devices existing in the external environment 7750.
  • General-purpose communication I / F7620 is a cellular communication protocol such as GSM (registered trademark) (Global System of Mobile communications), WiMAX (registered trademark), LTE (registered trademark) (Long Term Evolution) or LTE-A (LTE-Advanced).
  • GSM registered trademark
  • WiMAX registered trademark
  • LTE registered trademark
  • LTE-A Long Term Evolution
  • Bluetooth® wireless LAN (also referred to as Wi-Fi®), Bluetooth®.
  • the general-purpose communication I / F 7620 connects to a device (for example, an application server or a control server) existing on an external network (for example, the Internet, a cloud network, or a business-specific network) via, for example, a base station or an access point. You may. Further, the general-purpose communication I / F7620 uses, for example, P2P (Peer To Peer) technology to provide a terminal existing in the vicinity of the vehicle (for example, a terminal of a driver, a pedestrian or a store, or an MTC (Machine Type Communication) terminal). May be connected with.
  • P2P Peer To Peer
  • MTC Machine Type Communication
  • the dedicated communication I / F 7630 is a communication I / F that supports a communication protocol formulated for use in a vehicle.
  • the dedicated communication I / F7630 uses a standard protocol such as WAVE (Wireless Access in Vehicle Environment), DSRC (Dedicated Short Range Communications), or a cellular communication protocol, which is a combination of the lower layer IEEE802.11p and the upper layer IEEE1609. May be implemented.
  • the dedicated communication I / F7630 typically includes vehicle-to-vehicle (Vehicle to Vehicle) communication, road-to-vehicle (Vehicle to Infrastructure) communication, vehicle-to-home (Vehicle to Home) communication, and pedestrian-to-vehicle (Vehicle to Pedestrian) communication. ) Carry out V2X communication, which is a concept that includes one or more of the communications.
  • the positioning unit 7640 receives, for example, a GNSS signal from a GNSS (Global Navigation Satellite System) satellite (for example, a GPS signal from a GPS (Global Positioning System) satellite), executes positioning, and executes positioning, and the latitude, longitude, and altitude of the vehicle. Generate location information including.
  • the positioning unit 7640 may specify the current position by exchanging signals with the wireless access point, or may acquire position information from a terminal such as a mobile phone, PHS, or smartphone having a positioning function.
  • the beacon receiving unit 7650 receives radio waves or electromagnetic waves transmitted from a radio station or the like installed on the road, and acquires information such as the current position, traffic jam, road closure, or required time.
  • the function of the beacon receiving unit 7650 may be included in the above-mentioned dedicated communication I / F 7630.
  • the in-vehicle device I / F 7660 is a communication interface that mediates the connection between the microcomputer 7610 and various in-vehicle devices 7760 existing in the vehicle.
  • the in-vehicle device I / F7660 may establish a wireless connection using a wireless communication protocol such as wireless LAN, Bluetooth®, NFC (Near Field Communication) or WUSB (Wireless USB).
  • a wireless communication protocol such as wireless LAN, Bluetooth®, NFC (Near Field Communication) or WUSB (Wireless USB.
  • the in-vehicle device I / F7660 is connected to USB (Universal Serial Bus), HDMI (registered trademark) (High-Definition Multimedia Interface), or MHL (Mobile) via a connection terminal (and a cable if necessary) (not shown).
  • a wired connection such as High-definition Link may be established.
  • the in-vehicle device 7760 may include, for example, at least one of a passenger's mobile device or wearable device, or an information device carried or attached to the vehicle.
  • the in-vehicle device 7760 may include a navigation device that searches for a route to an arbitrary destination.
  • the in-vehicle device I / F 7660 exchanges control signals or data signals with these in-vehicle devices 7760.
  • the in-vehicle network I / F7680 is an interface that mediates communication between the microcomputer 7610 and the communication network 7010.
  • the vehicle-mounted network I / F7680 transmits and receives signals and the like according to a predetermined protocol supported by the communication network 7010.
  • the microcomputer 7610 of the integrated control unit 7600 is via at least one of general-purpose communication I / F7620, dedicated communication I / F7630, positioning unit 7640, beacon receiving unit 7650, in-vehicle device I / F7660, and in-vehicle network I / F7680. Based on the information acquired in the above, the vehicle control system 7000 is controlled according to various programs. For example, the microcomputer 7610 calculates the control target value of the driving force generator, the steering mechanism, or the braking device based on the acquired information inside and outside the vehicle, and outputs a control command to the drive system control unit 7100. May be good.
  • the microcomputer 7610 realizes ADAS (Advanced Driver Assistance System) functions including vehicle collision avoidance or impact mitigation, follow-up driving based on inter-vehicle distance, vehicle speed maintenance driving, vehicle collision warning, vehicle lane deviation warning, and the like. Cooperative control may be performed for the purpose of.
  • the microcomputer 7610 automatically travels autonomously without relying on the driver's operation by controlling the driving force generator, steering mechanism, braking device, etc. based on the acquired information on the surroundings of the vehicle. Coordinated control for the purpose of driving or the like may be performed.
  • ADAS Advanced Driver Assistance System
  • the microcomputer 7610 has information acquired via at least one of general-purpose communication I / F7620, dedicated communication I / F7630, positioning unit 7640, beacon receiving unit 7650, in-vehicle device I / F7660, and in-vehicle network I / F7680. Based on the above, three-dimensional distance information between the vehicle and an object such as a surrounding structure or a person may be generated, and local map information including the peripheral information of the current position of the vehicle may be created. Further, the microcomputer 7610 may predict a danger such as a vehicle collision, a pedestrian or the like approaching or entering a closed road based on the acquired information, and may generate a warning signal.
  • the warning signal may be, for example, a signal for generating a warning sound or turning on a warning lamp.
  • the audio image output unit 7670 transmits the output signal of at least one of the audio and the image to the output device capable of visually or audibly notifying the passenger or the outside of the vehicle of the information.
  • an audio speaker 7710, a display unit 7720, and an instrument panel 7730 are exemplified as output devices.
  • the display unit 7720 may include, for example, at least one of an onboard display and a heads-up display.
  • the display unit 7720 may have an AR (Augmented Reality) display function.
  • the output device may be other devices other than these devices, such as headphones, wearable devices such as eyeglass-type displays worn by passengers, and projectors or lamps.
  • the display device displays the results obtained by various processes performed by the microcomputer 7610 or the information received from other control units in various formats such as texts, images, tables, and graphs. Display visually.
  • the audio output device converts an audio signal composed of reproduced audio data, acoustic data, or the like into an analog signal and outputs the audio signal audibly.
  • At least two control units connected via the communication network 7010 may be integrated as one control unit.
  • each control unit may be composed of a plurality of control units.
  • the vehicle control system 7000 may include another control unit (not shown).
  • the other control unit may have a part or all of the functions carried out by any of the control units. That is, as long as information is transmitted and received via the communication network 7010, predetermined arithmetic processing may be performed by any of the control units.
  • a sensor or device connected to any control unit may be connected to another control unit, and a plurality of control units may send and receive detection information to and from each other via the communication network 7010. .
  • the zoom lens and the imaging device of the present disclosure can be applied to the imaging unit 7410 and the imaging unit 7910, 7912, 7914, 7916, 7918.
  • the technique according to the present disclosure may be applied to an endoscopic surgery system.
  • FIG. 52 is a diagram showing an example of a schematic configuration of an endoscopic surgery system 5000 to which the technique according to the present disclosure can be applied.
  • FIG. 52 shows a surgeon (doctor) 5067 performing surgery on patient 5071 on patient bed 5069 using the endoscopic surgery system 5000.
  • the endoscopic surgery system 5000 includes an endoscope 5001, other surgical tools 5017, a support arm device 5027 for supporting the endoscope 5001, and various devices for endoscopic surgery. It is composed of a cart 5037 equipped with the above.
  • troccas 5025a to 5025d are punctured into the abdominal wall.
  • the lens barrel 5003 of the endoscope 5001 and other surgical tools 5017 are inserted into the body cavity of the patient 5071.
  • other surgical tools 5017 a pneumoperitoneum tube 5019, an energy treatment tool 5021 and forceps 5023 are inserted into the body cavity of patient 5071.
  • the energy treatment tool 5021 is a treatment tool that cuts and peels tissue, seals a blood vessel, or the like by using a high-frequency current or ultrasonic vibration.
  • the surgical tool 5017 shown in the illustration is merely an example, and as the surgical tool 5017, various surgical tools generally used in endoscopic surgery such as a sword and a retractor may be used.
  • the image of the surgical site in the body cavity of the patient 5071 taken by the endoscope 5001 is displayed on the display device 5041.
  • the surgeon 5067 performs a procedure such as excising the affected area by using the energy treatment tool 5021 or the forceps 5023 while viewing the image of the surgical site displayed on the display device 5041 in real time.
  • the pneumoperitoneum tube 5019, the energy treatment tool 5021, and the forceps 5023 are supported by the surgeon 5067, an assistant, or the like during the operation.
  • the support arm device 5027 includes an arm portion 5031 extending from the base portion 5029.
  • the arm portion 5031 is composed of joint portions 5033a, 5033b, 5033c, and links 5035a, 5035b, and is driven by control from the arm control device 5045.
  • the endoscope 5001 is supported by the arm portion 5031, and its position and posture are controlled. Thereby, the stable position of the endoscope 5001 can be fixed.
  • the endoscope 5001 is composed of a lens barrel 5003 in which a region having a predetermined length from the tip is inserted into the body cavity of the patient 5071, and a camera head 5005 connected to the base end of the lens barrel 5003.
  • the endoscope 5001 configured as a so-called rigid mirror having a rigid barrel 5003 is illustrated, but the endoscope 5001 is configured as a so-called flexible mirror having a flexible barrel 5003. May be good.
  • An opening in which an objective lens is fitted is provided at the tip of the lens barrel 5003.
  • a light source device 5043 is connected to the endoscope 5001, and the light generated by the light source device 5043 is guided to the tip of the lens barrel by a light guide extending inside the lens barrel 5003, and is an objective. It is irradiated toward the observation target in the body cavity of the patient 5071 through the lens.
  • the endoscope 5001 may be a direct endoscope, a perspective mirror, or a side endoscope.
  • An optical system and an image pickup element are provided inside the camera head 5005, and the reflected light (observation light) from the observation target is focused on the image pickup element by the optical system.
  • the observation light is photoelectrically converted by the image sensor, and an electric signal corresponding to the observation light, that is, an image signal corresponding to the observation image is generated.
  • the image signal is transmitted as RAW data to the camera control unit (CCU: Camera Control Unit) 5039.
  • the camera head 5005 is equipped with a function of adjusting the magnification and the focal length by appropriately driving the optical system thereof.
  • the camera head 5005 may be provided with a plurality of image pickup elements.
  • a plurality of relay optical systems are provided inside the lens barrel 5003 in order to guide the observation light to each of the plurality of image pickup elements.
  • the CCU 5039 is composed of a CPU (Central Processing Unit), a GPU (Graphics Processing Unit), and the like, and comprehensively controls the operations of the endoscope 5001 and the display device 5041. Specifically, the CCU 5039 performs various image processing for displaying an image based on the image signal, such as development processing (demosaic processing), on the image signal received from the camera head 5005. The CCU 5039 provides the image signal subjected to the image processing to the display device 5041. Further, the CCU 5039 transmits a control signal to the camera head 5005 and controls the driving thereof.
  • the control signal may include information about imaging conditions such as magnification and focal length.
  • the display device 5041 displays an image based on the image signal processed by the CCU 5039 under the control of the CCU 5039.
  • the endoscope 5001 is compatible with high-resolution shooting such as 4K (3840 horizontal pixels x 2160 vertical pixels) or 8K (7680 horizontal pixels x 4320 vertical pixels), and / or 3D display.
  • the display device 5041 a device capable of displaying a high resolution and / or a device capable of displaying in 3D can be used.
  • a more immersive feeling can be obtained by using a display device 5041 having a size of 55 inches or more.
  • a plurality of display devices 5041 having different resolutions and sizes may be provided depending on the application.
  • the light source device 5043 is composed of, for example, a light source such as an LED (light emission diode), and supplies irradiation light for photographing the surgical site to the endoscope 5001.
  • a light source such as an LED (light emission diode)
  • the arm control device 5045 is configured by a processor such as a CPU, and operates according to a predetermined program to control the drive of the arm portion 5031 of the support arm device 5027 according to a predetermined control method.
  • the input device 5047 is an input interface for the endoscopic surgery system 5000.
  • the user can input various information and input instructions to the endoscopic surgery system 5000 via the input device 5047.
  • the user inputs various information related to the surgery, such as physical information of the patient and information about the surgical procedure, via the input device 5047.
  • the user gives an instruction to drive the arm portion 5031 via the input device 5047, or an instruction to change the imaging conditions (type of irradiation light, magnification, focal length, etc.) by the endoscope 5001.
  • An instruction to drive the energy treatment tool 5021 and the like are input.
  • the type of input device 5047 is not limited, and the input device 5047 may be various known input devices.
  • the input device 5047 for example, a mouse, a keyboard, a touch panel, a switch, a foot switch 5057 and / or a lever and the like can be applied.
  • the touch panel may be provided on the display surface of the display device 5041.
  • the input device 5047 is a device worn by the user, such as a glasses-type wearable device or an HMD (Head Mounted Display), and various inputs are made according to the user's gesture and line of sight detected by these devices. Is done. Further, the input device 5047 includes a camera capable of detecting the movement of the user, and various inputs are performed according to the gesture and the line of sight of the user detected from the image captured by the camera. Further, the input device 5047 includes a microphone capable of picking up the user's voice, and various inputs are performed by voice through the microphone.
  • a glasses-type wearable device or an HMD Head Mounted Display
  • the input device 5047 By configuring the input device 5047 to be able to input various information in a non-contact manner in this way, a user belonging to a clean area (for example, an operator 5067) can operate a device belonging to a dirty area in a non-contact manner. Is possible. In addition, since the user can operate the device without taking his / her hand off the surgical tool that he / she has, the convenience of the user is improved.
  • the treatment tool control device 5049 controls the drive of the energy treatment tool 5021 for cauterizing, incising, sealing blood vessels, and the like of tissues.
  • the pneumoperitoneum device 5051 has a gas in the body cavity through the pneumoperitoneum tube 5019 in order to inflate the body cavity of the patient 5071 for the purpose of securing the field of view by the endoscope 5001 and securing the work space of the operator.
  • Recorder 5053 is a device capable of recording various information related to surgery.
  • the printer 5055 is a device capable of printing various information related to surgery in various formats such as texts, images, and graphs.
  • the support arm device 5027 includes a base portion 5029 as a base and an arm portion 5031 extending from the base portion 5029.
  • the arm portion 5031 is composed of a plurality of joint portions 5033a, 5033b, 5033c and a plurality of links 5035a, 5035b connected by the joint portions 5033b.
  • the configuration of the arm portion 5031 is shown in a simplified manner. Actually, the shapes, numbers and arrangements of the joint portions 5033a to 5033c and the links 5035a and 5035b, and the direction of the rotation axis of the joint portions 5033a to 5033c are appropriately set so that the arm portion 5031 has a desired degree of freedom. obtain.
  • the arm portion 5031 can be preferably configured to have more than 6 degrees of freedom.
  • the endoscope 5001 can be freely moved within the movable range of the arm portion 5031, so that the lens barrel 5003 of the endoscope 5001 can be inserted into the body cavity of the patient 5071 from a desired direction. It will be possible.
  • Actuators are provided in the joint portions 5033a to 5033c, and the joint portions 5033a to 5033c are configured to be rotatable around a predetermined rotation axis by driving the actuator.
  • the arm control device 5045 By controlling the drive of the actuator by the arm control device 5045, the rotation angles of the joint portions 5033a to 5033c are controlled, and the drive of the arm portion 5031 is controlled. Thereby, the position and orientation of the endoscope 5001 can be controlled.
  • the arm control device 5045 can control the drive of the arm unit 5031 by various known control methods such as force control or position control.
  • the arm control device 5045 appropriately controls the drive of the arm unit 5031 in response to the operation input.
  • the position and orientation of the endoscope 5001 may be controlled.
  • the endoscope 5001 at the tip of the arm portion 5031 can be moved from an arbitrary position to an arbitrary position, and then fixedly supported at the moved position.
  • the arm portion 5031 may be operated by a so-called master slave method. In this case, the arm portion 5031 can be remotely controlled by the user via an input device 5047 installed at a location away from the operating room.
  • the arm control device 5045 When force control is applied, the arm control device 5045 receives an external force from the user and moves the actuators of the joint portions 5033a to 5033c so that the arm portion 5031 moves smoothly according to the external force. So-called power assist control for driving may be performed. As a result, when the user moves the arm portion 5031 while directly touching the arm portion 5031, the arm portion 5031 can be moved with a relatively light force. Therefore, the endoscope 5001 can be moved more intuitively and with a simpler operation, and the convenience of the user can be improved.
  • the endoscope 5001 was supported by a doctor called a scopist.
  • the position of the endoscope 5001 can be fixed more reliably without manpower, so that an image of the surgical site can be stably obtained. , It becomes possible to perform surgery smoothly.
  • the arm control device 5045 does not necessarily have to be provided on the cart 5037. Further, the arm control device 5045 does not necessarily have to be one device. For example, the arm control device 5045 may be provided at each joint portion 5033a to 5033c of the arm portion 5031 of the support arm device 5027, and the arm portion 5031 is driven by the plurality of arm control devices 5045 cooperating with each other. Control may be realized.
  • the light source device 5043 supplies the endoscope 5001 with irradiation light for photographing the surgical site.
  • the light source device 5043 is composed of, for example, an LED, a laser light source, or a white light source composed of a combination thereof.
  • a white light source is configured by combining RGB laser light sources, the output intensity and output timing of each color (each wavelength) can be controlled with high accuracy. Therefore, the white balance of the captured image in the light source device 5043 can be controlled. Can be adjusted.
  • the laser light from each of the RGB laser light sources is irradiated to the observation target in a time-divided manner, and the drive of the image sensor of the camera head 5005 is controlled in synchronization with the irradiation timing to support each of RGB. It is also possible to capture the image in a time-divided manner. According to this method, a color image can be obtained without providing a color filter on the image sensor.
  • the drive of the light source device 5043 may be controlled so as to change the intensity of the output light at predetermined time intervals.
  • the drive of the image sensor of the camera head 5005 in synchronization with the timing of changing the light intensity to acquire an image in a time-divided manner and synthesizing the image, so-called high dynamic without blackout and overexposure. Range images can be generated.
  • the light source device 5043 may be configured to be able to supply light in a predetermined wavelength band corresponding to special light observation.
  • special light observation for example, by utilizing the wavelength dependence of light absorption in body tissue to irradiate light in a narrow band as compared with the irradiation light (that is, white light) in normal observation, the surface layer of the mucous membrane. So-called narrow band imaging, in which a predetermined tissue such as a blood vessel is photographed with high contrast, is performed.
  • fluorescence observation may be performed in which an image is obtained by fluorescence generated by irradiating with excitation light.
  • the body tissue is irradiated with excitation light to observe the fluorescence from the body tissue (autofluorescence observation), or a reagent such as indocyanine green (ICG) is locally injected into the body tissue and the body tissue is injected.
  • An excitation light corresponding to the fluorescence wavelength of the reagent may be irradiated to obtain a fluorescence image.
  • the light source device 5043 may be configured to be capable of supplying narrow band light and / or excitation light corresponding to such special light observation.
  • FIG. 53 is a block diagram showing an example of the functional configuration of the camera head 5005 and the CCU 5039 shown in FIG. 52.
  • the camera head 5005 has a lens unit 5007, an imaging unit 5009, a driving unit 5011, a communication unit 5013, and a camera head control unit 5015 as its functions.
  • the CCU 5039 has a communication unit 5059, an image processing unit 5061, and a control unit 5063 as its functions.
  • the camera head 5005 and the CCU 5039 are bidirectionally communicatively connected by a transmission cable 5065.
  • the lens unit 5007 is an optical system provided at a connection portion with the lens barrel 5003.
  • the observation light taken in from the tip of the lens barrel 5003 is guided to the camera head 5005 and incident on the lens unit 5007.
  • the lens unit 5007 is configured by combining a plurality of lenses including a zoom lens and a focus lens.
  • the optical characteristics of the lens unit 5007 are adjusted so as to collect the observation light on the light receiving surface of the image sensor of the image pickup unit 5009.
  • the zoom lens and the focus lens are configured so that their positions on the optical axis can be moved in order to adjust the magnification and the focus of the captured image.
  • the image pickup unit 5009 is composed of an image pickup element and is arranged after the lens unit 5007.
  • the observation light that has passed through the lens unit 5007 is focused on the light receiving surface of the image pickup device, and an image signal corresponding to the observation image is generated by photoelectric conversion.
  • the image signal generated by the image pickup unit 5009 is provided to the communication unit 5013.
  • CMOS Complementary Metal Oxide Semiconductor
  • image pickup device for example, an image pickup device capable of capturing a high-resolution image of 4K or higher may be used.
  • the image pickup elements constituting the image pickup unit 5009 are configured to have a pair of image pickup elements for acquiring image signals for the right eye and the left eye corresponding to 3D display, respectively.
  • the 3D display enables the operator 5067 to more accurately grasp the depth of the biological tissue in the surgical site.
  • the image pickup unit 5009 is composed of a multi-plate type, a plurality of lens units 5007 are also provided corresponding to each image pickup element.
  • the imaging unit 5009 does not necessarily have to be provided on the camera head 5005.
  • the imaging unit 5009 may be provided inside the lens barrel 5003 immediately after the objective lens.
  • the drive unit 5011 is composed of an actuator, and the zoom lens and focus lens of the lens unit 5007 are moved by a predetermined distance along the optical axis under the control of the camera head control unit 5015. As a result, the magnification and focus of the image captured by the imaging unit 5009 can be adjusted as appropriate.
  • the communication unit 5013 is composed of a communication device for transmitting and receiving various information to and from the CCU 5039.
  • the communication unit 5013 transmits the image signal obtained from the image pickup unit 5009 as RAW data to the CCU 5039 via the transmission cable 5065.
  • the image signal is transmitted by optical communication.
  • the surgeon 5067 performs the surgery while observing the condition of the affected area with the captured image, so for safer and more reliable surgery, the moving image of the surgical site is displayed in real time as much as possible. This is because it is required.
  • the communication unit 5013 is provided with a photoelectric conversion module that converts an electric signal into an optical signal.
  • the image signal is converted into an optical signal by the photoelectric conversion module and then transmitted to the CCU 5039 via the transmission cable 5065.
  • the communication unit 5013 receives a control signal for controlling the drive of the camera head 5005 from the CCU 5039.
  • the control signal includes, for example, information to specify the frame rate of the captured image, information to specify the exposure value at the time of imaging, and / or information to specify the magnification and focus of the captured image, and the like. Contains information about the condition.
  • the communication unit 5013 provides the received control signal to the camera head control unit 5015.
  • the control signal from CCU5039 may also be transmitted by optical communication.
  • the communication unit 5013 is provided with a photoelectric conversion module that converts an optical signal into an electric signal, and the control signal is converted into an electric signal by the photoelectric conversion module and then provided to the camera head control unit 5015.
  • the imaging conditions such as the frame rate, exposure value, magnification, and focus are automatically set by the control unit 5063 of the CCU 5039 based on the acquired image signal. That is, the so-called AE (Auto Exposure) function, AF (Auto Focus) function, and AWB (Auto White Balance) function are mounted on the endoscope 5001.
  • the camera head control unit 5015 controls the drive of the camera head 5005 based on the control signal from the CCU 5039 received via the communication unit 5013. For example, the camera head control unit 5015 controls the drive of the image sensor of the image pickup unit 5009 based on the information to specify the frame rate of the captured image and / or the information to specify the exposure at the time of imaging. Further, for example, the camera head control unit 5015 appropriately moves the zoom lens and the focus lens of the lens unit 5007 via the drive unit 5011 based on the information that the magnification and the focus of the captured image are specified.
  • the camera head control unit 5015 may further have a function of storing information for identifying the lens barrel 5003 and the camera head 5005.
  • the camera head 5005 can be made resistant to autoclave sterilization.
  • the communication unit 5059 is composed of a communication device for transmitting and receiving various information to and from the camera head 5005.
  • the communication unit 5059 receives an image signal transmitted from the camera head 5005 via the transmission cable 5065.
  • the image signal can be suitably transmitted by optical communication.
  • the communication unit 5059 is provided with a photoelectric conversion module that converts an optical signal into an electric signal.
  • the communication unit 5059 provides the image processing unit 5061 with an image signal converted into an electric signal.
  • the communication unit 5059 transmits a control signal for controlling the drive of the camera head 5005 to the camera head 5005.
  • the control signal may also be transmitted by optical communication.
  • the image processing unit 5061 performs various image processing on the image signal which is the RAW data transmitted from the camera head 5005.
  • the image processing includes, for example, development processing, high image quality processing (band enhancement processing, super-resolution processing, NR (Noise reduction) processing and / or camera shake correction processing, etc.), and / or enlargement processing (electronic zoom processing). Etc., various known signal processing is included.
  • the image processing unit 5061 performs detection processing on the image signal for performing AE, AF, and AWB.
  • the image processing unit 5061 is composed of a processor such as a CPU or GPU, and when the processor operates according to a predetermined program, the above-mentioned image processing and detection processing can be performed.
  • the image processing unit 5061 is composed of a plurality of GPUs, the image processing unit 5061 appropriately divides the information related to the image signal and performs image processing in parallel by the plurality of GPUs.
  • the control unit 5063 performs various controls related to the imaging of the surgical site by the endoscope 5001 and the display of the captured image. For example, the control unit 5063 generates a control signal for controlling the drive of the camera head 5005. At this time, when the imaging condition is input by the user, the control unit 5063 generates a control signal based on the input by the user. Alternatively, when the endoscope 5001 is equipped with the AE function, the AF function, and the AWB function, the control unit 5063 has the optimum exposure value, focal length, and the optimum exposure value, depending on the result of the detection processing by the image processing unit 5061. The white balance is calculated appropriately and a control signal is generated.
  • control unit 5063 causes the display device 5041 to display the image of the surgical unit based on the image signal processed by the image processing unit 5061.
  • the control unit 5063 recognizes various objects in the surgical site image by using various image recognition techniques.
  • the control unit 5063 detects a surgical tool such as forceps, a specific biological part, bleeding, a mist when using the energy treatment tool 5021, etc. by detecting the shape, color, etc. of the edge of the object included in the surgical site image. Can be recognized.
  • the control unit 5063 uses the recognition result to superimpose and display various surgical support information on the image of the surgical site. By superimposing the surgical support information and presenting it to the surgeon 5067, it becomes possible to proceed with the surgery more safely and surely.
  • the transmission cable 5065 that connects the camera head 5005 and the CCU 5039 is an electric signal cable that supports electric signal communication, an optical fiber that supports optical communication, or a composite cable thereof.
  • the communication is performed by wire using the transmission cable 5065, but the communication between the camera head 5005 and the CCU 5039 may be performed wirelessly.
  • the communication between the two is performed wirelessly, it is not necessary to lay the transmission cable 5065 in the operating room, so that the situation where the movement of the medical staff in the operating room is hindered by the transmission cable 5065 can be solved.
  • the example of the endoscopic surgery system 5000 to which the technique according to the present disclosure can be applied has been described above. Although the endoscopic surgery system 5000 has been described here as an example, the system to which the technique according to the present disclosure can be applied is not limited to such an example. For example, the techniques according to the present disclosure may be applied to examination flexible endoscopic systems and microsurgery systems.
  • the technique according to the present disclosure can be suitably applied to the camera head 5005 among the configurations described above.
  • the zoom lens of the present disclosure can be suitably applied to the lens unit 5007 of the camera head 5005.
  • the configuration including substantially 6 or 7 lens groups as a whole has been described, but the configuration may be composed of 8 or more lens groups as a whole. Further, the configuration may further include a lens having substantially no refractive power.
  • the present technology can have the following configuration.
  • the first lens group having a negative refractive power and the succeeding group including a plurality of lens groups are configured to optimize the configuration of each lens group. It is possible to realize a zoom lens and an imaging device that can satisfactorily correct fluctuations in various aberrations associated with focusing and are suitable for wide-angle lensing.
  • the first lens group with negative refractive power and It is composed of a subsequent group including multiple lens groups whose distance between adjacent lens groups changes during zooming or focusing to a short distance.
  • the plurality of lens groups are arranged between a positive lens group, a negative lens group, and the first lens group and the positive lens group that move when focusing to a short distance, and always exert a positive refractive power during zooming.
  • Fsw1 Amount of movement of the positive lens group during focusing at the wide-angle end
  • Fsw2 Amount of movement of the negative lens group during focusing at the wide-angle end
  • Fst1 Amount of movement of the positive lens group during focusing at the telephoto end
  • Fst2 Amount of movement during focusing of the positive lens group at the telephoto end This is the amount of movement of the negative lens group during focusing.
  • fFb1 Focal length of the positive lens group
  • ft Focal length of the entire system at the telephoto end.
  • ⁇ 3.4 > (5)
  • f1 Focal length of the first lens group
  • fw Focal length of the entire system at the wide-angle end.
  • fpt Focal length of the intermediate lens group at the telephoto end
  • ft Focal length of the entire system at the telephoto end.
  • frw Focal length at the wide-angle end of the at least two lens groups
  • fw Focal length of the entire system at the wide-angle end.
  • the intermediate lens group is a single lens group. When zooming from the wide-angle end to the telephoto end The intermediate lens group moves toward the object so that the distance from the first lens group becomes small. The positive lens group moves toward the object so that the distance from the intermediate lens group becomes small.
  • the negative lens group moves toward the object while changing the distance from the positive lens group.
  • the zoom lens is From the object side to the image plane side, in order
  • the first lens group with negative refractive power and It is composed of a subsequent group including multiple lens groups whose distance between adjacent lens groups changes during zooming or focusing to a short distance.
  • the plurality of lens groups are arranged between a positive lens group, a negative lens group, and the first lens group and the positive lens group that move when focusing to a short distance, and always exert a positive refractive power during zooming.
  • An image pickup device that satisfies the following conditional expressions.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Nonlinear Science (AREA)
  • Lenses (AREA)

Abstract

Une lentille grossissante de l'invention comprend un premier groupe de lentilles ayant une réfringence négative, et un groupe suivant comprenant une pluralité de groupes de lentilles dans lesquels la distance entre les groupes de lentilles adjacents est modifiée pendant un zoom ou une focalisation sur une courte distance, le premier groupe de lentilles et le groupe suivant étant agencés dans cet ordre depuis un côté objet vers un côté surface d'image. La pluralité de groupes de lentilles comprend un groupe de lentilles convergentes se déplaçant pendant la focalisation sur une courte distance, ainsi qu'un groupe de lentilles divergentes et un groupe de lentilles intermédiaires disposé entre le premier groupe de lentilles et le groupe de lentilles convergentes et ayant constamment une réfringence positive pendant le zoom. Lors du zoom d'une extrémité grand angle à une extrémité téléobjectif, le premier groupe de lentilles et le groupe de lentilles intermédiaires se déplacent de manière à réduire la distance entre le premier groupe de lentilles et le groupe de lentilles intermédiaires. Lors de la focalisation sur une courte distance, le groupe de lentilles convergentes se déplace vers le côté objet.
PCT/JP2021/011305 2020-03-31 2021-03-19 Lentille grossissante et dispositif de prise d'image WO2021200257A1 (fr)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7494228B2 (ja) 2022-01-01 2024-06-03 キヤノン株式会社 ズームレンズおよびそれを有する撮像装置

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Publication number Priority date Publication date Assignee Title
JP2014052413A (ja) * 2012-09-05 2014-03-20 Canon Inc ズームレンズ及びそれを有する撮像装置
JP2014160229A (ja) * 2013-01-25 2014-09-04 Panasonic Corp ズームレンズ系、交換レンズ装置及びカメラシステム
JP2015028530A (ja) * 2013-07-30 2015-02-12 キヤノン株式会社 ズームレンズ及びそれを有する撮像装置
JP2017122745A (ja) * 2014-05-19 2017-07-13 オリンパス株式会社 ズームレンズ及びそれを有する撮像装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014052413A (ja) * 2012-09-05 2014-03-20 Canon Inc ズームレンズ及びそれを有する撮像装置
JP2014160229A (ja) * 2013-01-25 2014-09-04 Panasonic Corp ズームレンズ系、交換レンズ装置及びカメラシステム
JP2015028530A (ja) * 2013-07-30 2015-02-12 キヤノン株式会社 ズームレンズ及びそれを有する撮像装置
JP2017122745A (ja) * 2014-05-19 2017-07-13 オリンパス株式会社 ズームレンズ及びそれを有する撮像装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7494228B2 (ja) 2022-01-01 2024-06-03 キヤノン株式会社 ズームレンズおよびそれを有する撮像装置

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