JP6991814B2 - Zoom lens and image pickup device - Google Patents
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Description
本発明は、ズームレンズ及び撮像装置に関する。 The present invention relates to a zoom lens and an image pickup device.
近年、レンズ全長が短く、小型なズームレンズが要求されている。 In recent years, there has been a demand for a compact zoom lens having a short overall lens length.
特許文献１には、物体側から像側へ順に配置された、負の屈折力の第１レンズ群、正の屈折力の第２レンズ群、負の屈折力の第３レンズ群、負の屈折力の第４レンズ群からなり、第３レンズ群でフォーカシングを行う広角ズームレンズが開示されている。
In
特許文献１に記載のレンズ構成のズームレンズをさらに小型化する場合、ズーミングに際しての歪曲収差の変動が大きくなる場合がある。そこで、小型で、収差変動も少ないズームレンズを実現するためには、各レンズ群、特に第４レンズ群のパワー配置をより適切に設定することが望まれる。
When the zoom lens having the lens configuration described in
そこで本発明は、小型で、全ズーム域において高い光学性能を有するズームレンズ及び撮像装置を提供することを目的とする。 Therefore, an object of the present invention is to provide a zoom lens and an image pickup device that are compact and have high optical performance in the entire zoom range.
本発明のズームレンズは、最も物体側に配置された負の屈折力の第１レンズ群、前記第１レンズ群の像側に隣接して配置された正の屈折力の第２レンズ群、前記第２レンズ群の像側に隣接して配置された負の屈折力の第３レンズ群、前記第３レンズ群の像側に隣接して配置された負の屈折力の第４レンズ群を有し、ズーミングに際して隣り合うレンズ群の間隔が変化するズームレンズであって、前記第１レンズ群の焦点距離をｆ１、前記第２レンズ群の焦点距離をｆ２、前記第３レンズ群の焦点距離をｆ３、前記第４レンズ群の焦点距離をｆ４とするとき、
０．８０＜ｆ３／ｆ４≦２．１５
０．３０＜ｆ２／｜ｆ４｜≦０．５０
０．５０＜｜ｆ１｜／ｆ２≦１．１４
の条件式を満たすことを特徴とする。
The zoom lens of the present invention includes a first lens group having a negative refractive force arranged on the most object side, a second lens group having a positive refractive force arranged adjacent to the image side of the first lens group, and the like. It has a third lens group with a negative refractive force arranged adjacent to the image side of the second lens group, and a fourth lens group with a negative refractive force arranged adjacent to the image side of the third lens group. A zoom lens in which the distance between adjacent lens groups changes during zooming, the focal distance of the first lens group is f1, the focal distance of the second lens group is f2, and the focal distance of the third lens group is f2. f3, when the focal distance of the fourth lens group is f4,
0.80 <f3 / f4 ≤ 2.15
0.30 <f2 / | f4 | ≦ 0.50
0.50 << f1 | / f2≤1.14
It is characterized by satisfying the conditional expression of.
本発明によれば、小型で、全ズーム域において高い光学性能を有するズームレンズ及び撮像装置を実現することができる。 According to the present invention, it is possible to realize a zoom lens and an image pickup device that are compact and have high optical performance in the entire zoom range.
以下、本発明の実施例に係るズームレンズ及び撮像装置について、添付の図面に基づいて詳細に説明する。 Hereinafter, the zoom lens and the image pickup apparatus according to the embodiment of the present invention will be described in detail with reference to the attached drawings.
［ズームレンズの実施例］
各実施例のズームレンズは、ビデオカメラやデジタルカメラ、銀塩フィルムカメラ、テレビカメラ等の撮像装置に用いられる撮影光学系である。図１、３、５、７、９、１１に示すズームレンズの断面図において、左方が物体側（前方）であり、右方が像側（後方）である。また各断面図において、ｉを物体側から像側へのレンズ群の順番とすると、Ｌｉは第ｉレンズ群を示す。また、開口絞りＳＰは、開放Ｆナンバー（Ｆｎｏ）の光束を決定（制限）し、可変絞りＳＳＰは、ズーミングに際して口径が変化する。
[Example of zoom lens]
The zoom lens of each embodiment is a photographing optical system used in an image pickup device such as a video camera, a digital camera, a silver salt film camera, and a television camera. In the cross-sectional view of the zoom lens shown in FIGS. 1, 3, 5, 7, 9, and 11, the left side is the object side (front) and the right side is the image side (rear). Further, in each cross-sectional view, when i is the order of the lens group from the object side to the image side, Li indicates the i-th lens group. Further, the aperture stop SP determines (limits) the luminous flux of the open F number (Fno), and the variable aperture SSP changes the aperture during zooming.
ビデオカメラやデジタルカメラなどの撮像装置に各実施例のズームレンズを使用する場合は、像面ＩＰは、ＣＣＤセンサまたはＣＭＯＳセンサ等の固体撮像素子（光電変換素子）に相当する。銀塩フィルムカメラの撮像装置に各実施例のズームレンズを使用する場合は、像面ＩＰはフィルム面に相当する。 When the zoom lens of each embodiment is used for an image pickup device such as a video camera or a digital camera, the image plane IP corresponds to a solid-state image pickup element (photoelectric conversion element) such as a CCD sensor or a CMOS sensor. When the zoom lens of each embodiment is used for the image pickup apparatus of the silver halide film camera, the image plane IP corresponds to the film plane.
広角端から望遠端へのズーミングに際して、各レンズ群は、図中の実線矢印に示すように移動する。無限遠から至近距離へのフォーカシングに際して、フォーカスレンズ群は、図中の破線矢印に示すように移動する。 When zooming from the wide-angle end to the telephoto end, each lens group moves as shown by the solid arrow in the figure. When focusing from infinity to a close range, the focus lens group moves as shown by the dashed arrow in the figure.
球面収差図においてＦｎｏはＦナンバーであり、実線はｄ線（波長５８７．６ｎｍ）、二点鎖線はｇ線（波長４３５．８ｎｍ）に対する球面収差を示している。非点収差図において実線Ｓはサジタル像面、破線Ｍはメリディオナル像面である。歪曲収差はｄ線について示している。色収差図はｇ線における色収差を示している。ωは半画角（角度）である。 In the spherical aberration diagram, Fno is an F number, the solid line shows the spherical aberration with respect to the d line (wavelength 587.6 nm), and the two-dot chain line shows the spherical aberration with respect to the g line (wavelength 435.8 nm). In the astigmatism diagram, the solid line S is a sagittal image plane and the broken line M is a meridional image plane. Distortion is shown for the d-line. The chromatic aberration diagram shows the chromatic aberration in the g-line. ω is a half angle of view (angle).
「広角端」と「望遠端」は、それぞれ、各レンズ群が機構的に移動可能な範囲の両端に位置したときのズーム位置をいう。 The "wide-angle end" and the "telephoto end" refer to the zoom positions when each lens group is located at both ends of a mechanically movable range, respectively.
本発明のズームレンズは、物体側から像側へ順に配置された、負の屈折力の第１レンズ群、正の屈折力の第２レンズ群、負の屈折力の第３レンズ群、負の屈折力の第４レンズ群を有する。そして、ズーミングに際して、隣り合うレンズ群の間隔が変化する。各レンズ群は、１枚以上のレンズを有していればよく、複数枚のレンズを有していなくてもよい。 The zoom lens of the present invention has a first lens group having a negative refractive power, a second lens group having a positive refractive power, a third lens group having a negative refractive power, and a negative lens group arranged in order from the object side to the image side. It has a fourth lens group of refractive power. Then, during zooming, the distance between adjacent lens groups changes. Each lens group may have one or more lenses, and may not have a plurality of lenses.
広角端から望遠端へのズーミングに際して、第１レンズ群と第２レンズ群の間隔が狭まり、第２レンズ群と第３レンズ群の間隔が広がることにより、変倍作用が生じる。また、ズーミングに際して第３レンズ群と第４レンズ群の間隔が変化することにより、広角端から望遠端にかけて非点収差が補正される。 When zooming from the wide-angle end to the telephoto end, the distance between the first lens group and the second lens group is narrowed, and the distance between the second lens group and the third lens group is widened, so that a scaling effect occurs. Further, astigmatism is corrected from the wide-angle end to the telephoto end by changing the distance between the third lens group and the fourth lens group during zooming.
各実施例のズームレンズは条件式（１）を満たす。
０．８０＜ｆ３／ｆ４＜５．００ ・・・（１）
The zoom lens of each embodiment satisfies the conditional expression (1).
0.80 <f3 / f4 <5.00 ... (1)
ただし、第３レンズ群の焦点距離をｆ３、第４レンズ群の焦点距離をｆ４とする。 However, the focal length of the third lens group is f3, and the focal length of the fourth lens group is f4.
条件式（１）は、第３レンズ群の焦点距離と第４レンズ群の焦点距離の比に関する。一般に、広角ズームレンズや、バックフォーカスの短いズームレンズでは、広角端から望遠端へのズーミングに際して、第４レンズ群に入射する軸外光線の入射高さの変動が大きくなる。また、第４レンズ群の屈折力が大きくなるほど入射高さの変動に応じた像面湾曲や非点収差の変動が大きくなる。したがって、条件式（１）の上限値を上回って第４レンズ群の焦点距離が短くなると、すなわち第４レンズ群の屈折力が大きくなると、像面湾曲および非点収差の変動が大きくなり、ズーム全域で高い光学性能を有することが困難になるため好ましくない。また、条件式（１）の下限値を下回って第４レンズ群の焦点距離が長くなると、ズームレンズの全長が長くなってしまうため、ズームレンズの小型化が困難になるため好ましくない。 The conditional equation (1) relates to the ratio of the focal length of the third lens group to the focal length of the fourth lens group. Generally, in a wide-angle zoom lens or a zoom lens having a short back focus, the incident height of off-axis light rays incident on the fourth lens group fluctuates greatly when zooming from the wide-angle end to the telephoto end. Further, as the refractive power of the fourth lens group becomes larger, the curvature of field and the fluctuation of astigmatism become larger according to the fluctuation of the incident height. Therefore, when the focal length of the fourth lens group becomes shorter than the upper limit of the conditional equation (1), that is, when the refractive power of the fourth lens group becomes large, the curvature of field and the fluctuation of astigmatism become large, and the zoom It is not preferable because it becomes difficult to have high optical performance in the entire range. Further, if the focal length of the fourth lens group becomes longer than the lower limit of the conditional expression (1), the total length of the zoom lens becomes long, which makes it difficult to miniaturize the zoom lens, which is not preferable.
したがって、小型で、全ズーム域において高い光学性能を得られる、ズームレンズを実現できる。 Therefore, it is possible to realize a zoom lens that is compact and can obtain high optical performance in the entire zoom range.
さらに、ズームレンズは条件式（２）～（６）のうち少なくとも１つを満足することが好ましい。
０．３０＜ｆ２／｜ｆ４｜＜３．００ ・・・（２）
０．５０＜｜ｍ２｜／ｆｗ＜１．４０ ・・・（３）
０．５０＜｜ｆ１｜／ｆ２＜２．００ ・・・（４）
ｆｔ／ｆｗ＞１．８０ ・・・（５）
１．００＜｜ｆ４｜／ｆｗ＜４．５０ ・・・（６）
Further, the zoom lens preferably satisfies at least one of the conditional expressions (2) to (6).
0.30 <f2 / | f4 | <3.00 ... (2)
0.50 << | m2 | / fw <1.40 ... (3)
0.50 << | f1 | / f2 <2.00 ... (4)
ft / fw> 1.80 ... (5)
1.00 << | f4 | / fw <4.50 ... (6)
ただし、第１レンズ群の焦点距離をｆ１、第２レンズ群の焦点距離をｆ２、広角端から望遠端へのズーミングにおける第２レンズ群の移動量をｍ２、ズームレンズの広角端における焦点距離をｆｗ、ズームレンズの望遠端における焦点距離をｆｔとする。なお、レンズ群の移動量とは、広角端におけるレンズ群の光軸上の位置と望遠端におけるレンズ群の光軸上の位置との差をいう。レンズ群の移動量の符号は、広角端に比べて望遠端において像側に位置するときを正、広角端に比べて望遠端において物体側に位置するときを負とする。 However, the focal length of the first lens group is f1, the focal length of the second lens group is f2, the amount of movement of the second lens group in zooming from the wide-angle end to the telephoto end is m2, and the focal length of the zoom lens at the wide-angle end. Let ft be the focal length at the telephoto end of the zoom lens. The amount of movement of the lens group means the difference between the position on the optical axis of the lens group at the wide-angle end and the position on the optical axis of the lens group at the telephoto end. The sign of the amount of movement of the lens group is positive when it is located on the image side at the telephoto end compared to the wide-angle end, and negative when it is located on the object side at the telephoto end compared to the wide-angle end.
次に、条件式（２）～（６）の技術的意味について説明する。 Next, the technical meanings of the conditional expressions (2) to (6) will be described.
条件式（２）は、第２レンズ群の焦点距離と第４レンズ群の焦点距離との比に関する。条件式（２）の下限値を下回って第２レンズ群の焦点距離が第４レンズ群の焦点距離に対して短くなると、ズーム全域での球面収差およびコマ収差の変動が大きくなるため好ましくない。また、条件式（２）の上限値を下回って、第２レンズ群の焦点距離が第４レンズ群の焦点距離に対して長くなると、所定の変倍をするために必要な第２レンズ群の移動量が大きくなる。これにより光学系の小型化が困難になるため好ましくない。 Conditional expression (2) relates to the ratio of the focal length of the second lens group to the focal length of the fourth lens group. If the focal length of the second lens group is shorter than the lower limit of the conditional equation (2) with respect to the focal length of the fourth lens group, the fluctuation of spherical aberration and coma over the entire zoom range becomes large, which is not preferable. Further, when the focal length of the second lens group becomes longer than the focal length of the fourth lens group below the upper limit of the conditional expression (2), the second lens group required for predetermined scaling is used. The amount of movement increases. This makes it difficult to reduce the size of the optical system, which is not preferable.
条件式（３）は、広角端から望遠端へのズーミングにおける第２レンズ群の移動量に関する。条件式（３）の下限値を下回って第２レンズ群の移動量が小さくなると、軸外光線が低い位置を通過する第２レンズ群の変倍分担が小さくなる。これにより、第２レンズ群よりも像側に配置されたレンズ群の変倍分担が大きくなると、当該レンズ群の変倍負担が小さい場合に比べて、ズーミングに際しての歪曲収差や像面湾曲の変動が大きくなり好ましくない。条件式（３）の上限値を上回って第２レンズ群の移動量が大きくなると、広角端において第１レンズ群と第２レンズ群の間隔を大きく確保する必要がある。これにより、光学系の小型化が困難になるため好ましくない。 Conditional expression (3) relates to the amount of movement of the second lens group in zooming from the wide-angle end to the telephoto end. When the amount of movement of the second lens group becomes smaller than the lower limit of the conditional expression (3), the variable magnification of the second lens group through which the off-axis light rays pass at a low position becomes small. As a result, when the magnification sharing of the lens group arranged on the image side is larger than that of the second lens group, the distortion aberration and the curvature of field during zooming are changed as compared with the case where the magnification burden of the lens group is small. Is not preferable because it becomes large. When the amount of movement of the second lens group exceeds the upper limit of the conditional expression (3), it is necessary to secure a large distance between the first lens group and the second lens group at the wide-angle end. This makes it difficult to reduce the size of the optical system, which is not preferable.
条件式（４）は、第１レンズ群の焦点距離と第２レンズ群の焦点距離との比に関する。条件式（４）の下限値を下回って、第１レンズ群の焦点距離が第２レンズ群の焦点距離に対して短くなると、ズームレンズが小型になるものの、広角端における歪曲収差および非点収差が大きくなり好ましくない。条件式（４）の上限値を上回って第１レンズ群の焦点距離が第２レンズ群の焦点距離に対して長くなると、レンズ全長（最も物体側のレンズの物体側の面から像面までの距離）の短縮および第１レンズ群の小径化が困難になるため好ましくない。 Conditional expression (4) relates to the ratio of the focal length of the first lens group to the focal length of the second lens group. When the focal length of the first lens group becomes shorter than the focal length of the second lens group below the lower limit of the conditional equation (4), the zoom lens becomes smaller, but distortion and astigmatism at the wide-angle end Is not preferable because it becomes large. When the focal length of the first lens group becomes longer than the focal length of the second lens group beyond the upper limit of the conditional equation (4), the total length of the lens (from the surface of the lens on the object side to the image plane) It is not preferable because it becomes difficult to shorten the distance) and reduce the diameter of the first lens group.
条件式（５）は、各実施例のズームレンズの変倍比に関する。条件式（５）の下限を下回ると、ズーム比が小さくなりすぎて、ズームレンズとしての機能を発揮できず好ましくない。 Conditional expression (5) relates to the magnification ratio of the zoom lens of each embodiment. If it is less than the lower limit of the conditional expression (5), the zoom ratio becomes too small and the function as a zoom lens cannot be exhibited, which is not preferable.
条件式（６）は、第４レンズ群の焦点距離とズームレンズの広角端における焦点距離との比に関する。条件式（６）の下限値を下回って第４レンズ群の焦点距離がズームレンズの広角端における焦点距離に対して短くなると、ズーミングに際して軸外収差の変動の抑制が大きくなり好ましくない。条件式（６）の上限値を上回って第４レンズ群の焦点距離がズームレンズの広角端における焦点距離よりも長くなると、光学系の小型化が困難になるため好ましくない。 Conditional expression (6) relates to the ratio of the focal length of the fourth lens group to the focal length at the wide-angle end of the zoom lens. If the focal length of the fourth lens group is shorter than the lower limit of the conditional equation (6) with respect to the focal length at the wide-angle end of the zoom lens, the suppression of fluctuations in off-axis aberrations during zooming becomes large, which is not preferable. If the focal length of the fourth lens group exceeds the upper limit of the conditional equation (6) and becomes longer than the focal length at the wide-angle end of the zoom lens, it becomes difficult to miniaturize the optical system, which is not preferable.
また、第４レンズ群は、物体側に凹面を向けた負レンズを有することが好ましい。物体側に凹面があることにより、広角端において生じる像面湾曲と、望遠端において第２レンズ群より生じる球面収差とを補正をすることができる。 Further, it is preferable that the fourth lens group has a negative lens having a concave surface facing the object side. Since there is a concave surface on the object side, it is possible to correct the curvature of field that occurs at the wide-angle end and the spherical aberration that occurs from the second lens group at the telephoto end.
また、第４レンズ群の、物体側に凹面を向けた負レンズは、中心から周辺にかけて負の屈折力が強くなるような非球面形状を有することが好ましい。非球面形状を有することにより、球面形状を有する場合に比べて、広角端において生じる像面湾曲および非点収差を補正しやすくなる。 Further, it is preferable that the negative lens of the fourth lens group having the concave surface facing the object side has an aspherical shape such that the negative refractive power becomes stronger from the center to the periphery. Having an aspherical shape makes it easier to correct curvature of field and astigmatism that occur at the wide-angle end, as compared to the case of having a spherical shape.
また、無限遠から至近距離へのフォーカシングに際して移動するフォーカスレンズ群は、比較的レンズの径が小さく且つレンズ枚数が少ない、第３レンズ群であることが好ましい。第３レンズ群でフォーカシングを行う場合は、他のレンズ群でフォーカシングを行う場合に比べて、フォーカスレンズ群を保持する鏡筒およびフォーカスレンズを駆動するための機構を小型化でき、ズームレンズの全系を小型化できる。さらに、フォーカスレンズ群は、正レンズおよび負レンズを少なくとも１枚ずつ有することが好ましい。正レンズおよび負レンズのいずれかのみで構成してしまうと、フォーカシング時の色収差変動を抑えることが困難になるため好ましくない。 Further, the focus lens group that moves when focusing from infinity to a close distance is preferably a third lens group having a relatively small lens diameter and a small number of lenses. When focusing with the third lens group, the lens barrel that holds the focus lens group and the mechanism for driving the focus lens can be made smaller than when focusing with other lens groups, and the entire zoom lens can be used. The system can be miniaturized. Further, the focus lens group preferably has at least one positive lens and one negative lens. If it is composed of only one of a positive lens and a negative lens, it becomes difficult to suppress chromatic aberration fluctuation during focusing, which is not preferable.
さらに、条件式（１）～（６）の数値範囲を次のように設定することが好ましい。
０．８５＜ｆ３／ｆ４＜４．５０ ・・・（１ａ）
０．３３＜ｆ２／｜ｆ４｜＜２．００ ・・・（２ａ）
０．６０＜｜ｍ２｜／ｆｗ＜１．３６ ・・・（３ａ）
０．６０＜｜ｆ１｜／ｆ２＜１．８０ ・・・（４ａ）
ｆｔ／ｆｗ＞１．９０ ・・・（５ａ）
１．５０＜｜ｆ４｜／ｆｗ＜４．２０ ・・・（６ａ）
Further, it is preferable to set the numerical range of the conditional expressions (1) to (6) as follows.
0.85 <f3 / f4 <4.50 ... (1a)
0.33 <f2 / | f4 | <2.00 ... (2a)
0.60 << | m2 | / fw <1.36 ... (3a)
0.60 << | f1 | / f2 <1.80 ... (4a)
ft / fw> 1.90 ... (5a)
1.50 << | f4 | / fw <4.20 ... (6a)
さらに、条件式（１ａ）～（６ａ）の数値範囲を次のように設定することが好ましい。
０．９０＜ｆ３／ｆ４＜４．００ ・・・（１ｂ）
０．３５＜ｆ２／｜ｆ４｜＜１．００ ・・・（２ｂ）
０．７０＜｜ｍ２｜／ｆｗ＜１．３２ ・・・（３ｂ）
０．７０＜｜ｆ１｜／ｆ２＜１．６０ ・・・（４ｂ）
ｆｔ／ｆｗ＞２．００ ・・・（５ｂ）
２．００＜｜ｆ４｜／ｆｗ＜４．００ ・・・（６ｂ）
Further, it is preferable to set the numerical range of the conditional expressions (1a) to (6a) as follows.
0.90 <f3 / f4 <4.00 ... (1b)
0.35 <f2 / | f4 | <1.00 ... (2b)
0.70 << | m2 | / fw <1.32 ... (3b)
0.70 << | f1 | / f2 <1.60 ... (4b)
ft / fw> 2.00 ... (5b)
2.00 << | f4 | / fw <4.00 ... (6b)
［実施例１］
図１（ａ）と図１（ｂ）は、それぞれ、実施例１のズームレンズの広角端と望遠端における断面図である。図２（ａ）と図２（ｂ）は、それぞれ、実施例１のズームレンズの広角端と望遠端における収差図である。
[Example 1]
1 (a) and 1 (b) are cross-sectional views of the zoom lens of Example 1 at the wide-angle end and the telephoto end, respectively. 2 (a) and 2 (b) are aberration diagrams at the wide-angle end and the telephoto end of the zoom lens of the first embodiment, respectively.
実施例１のズームレンズは、物体側から像側へ順に配置された、負の屈折力の第１レンズ群Ｌ１、正の屈折力の第２レンズ群Ｌ２、負の屈折力の第３レンズ群Ｌ３、負の屈折力の第４レンズ群Ｌ４からなる。 The zoom lens of the first embodiment has a first lens group L1 having a negative refractive power, a second lens group L2 having a positive refractive power, and a third lens group having a negative refractive power arranged in order from the object side to the image side. It consists of L3 and a fourth lens group L4 having a negative refractive power.
第２レンズ群Ｌ２は、絞りＳＰおよび可変絞りＳＳＰを含む。第３レンズ群Ｌ３は、無限遠から至近距離へのフォーカシングに際して像側へ移動するフォーカスレンズ群である。第３レンズ群Ｌ３は、正レンズと、該正レンズの像側に配置された負レンズとの接合レンズからなる。第４レンズ群Ｌ４は、最も物体側に配置された、物体側に凹面を向け且つ像側に凸面を向けた負レンズＮＬを有する。負レンズＮＬは、中心から周辺にかけて負の屈折力が強くなるような非球面形状を有する。 The second lens group L2 includes an aperture SP and a variable aperture SSP. The third lens group L3 is a focus lens group that moves toward the image side when focusing from infinity to a close range. The third lens group L3 is composed of a positive lens and a junction lens of a negative lens arranged on the image side of the positive lens. The fourth lens group L4 has a negative lens NL arranged on the most object side, with the concave surface facing the object side and the convex surface facing the image side. The negative lens NL has an aspherical shape in which the negative refractive power becomes stronger from the center to the periphery.
広角端から望遠端へのズーミングに際して、第１レンズ群Ｌ１は像側へ移動し、第２レンズ群Ｌ２、第３レンズ群Ｌ３、および第４レンズ群Ｌ４は物体側へ移動する。また、広角端から望遠端へのズーミングに際して、第１レンズ群Ｌ１と第２レンズ群Ｌ２の間隔は狭まり、第２レンズ群Ｌ２と第３レンズ群Ｌ３の間隔は広がり、第３レンズ群Ｌ３と第４レンズ群Ｌ４の間隔は狭まる。 During zooming from the wide-angle end to the telephoto end, the first lens group L1 moves to the image side, and the second lens group L2, the third lens group L3, and the fourth lens group L4 move to the object side. Further, when zooming from the wide-angle end to the telephoto end, the distance between the first lens group L1 and the second lens group L2 is narrowed, the distance between the second lens group L2 and the third lens group L3 is widened, and the third lens group L3 The distance between the fourth lens group L4 is narrowed.
［実施例２］
図３（ａ）と図３（ｂ）は、それぞれ、実施例２のズームレンズの広角端と望遠端における断面図である。図４（ａ）と図４（ｂ）は、ぞれぞれ、実施例２のズームレンズの広角端と望遠端における収差図である。
[Example 2]
3 (a) and 3 (b) are cross-sectional views of the zoom lens of the second embodiment at the wide-angle end and the telephoto end, respectively. 4 (a) and 4 (b) are aberration diagrams at the wide-angle end and the telephoto end of the zoom lens of the second embodiment, respectively.
実施例２のズームレンズは、物体側から像側へ順に配置された、負の屈折力の第１レンズ群Ｌ１、正の屈折力の第２レンズ群Ｌ２、負の屈折力の第３レンズ群Ｌ３、負の屈折力の第４レンズ群Ｌ４からなる。 The zoom lens of the second embodiment has a first lens group L1 having a negative refractive power, a second lens group L2 having a positive refractive power, and a third lens group having a negative refractive power arranged in order from the object side to the image side. It consists of L3 and a fourth lens group L4 having a negative refractive power.
第２レンズ群Ｌ２は、絞りＳＰおよび可変絞りＳＳＰを含む。第３レンズ群Ｌ３は、無限遠から至近距離へのフォーカシングに際して像側へ移動するフォーカスレンズ群である。第３レンズ群Ｌ３は、正レンズと、該正レンズの像側に配置された負レンズとの接合レンズからなる。第４レンズ群Ｌ４は、最も物体側に配置された、物体側に凹面を向け且つ像側に凸面を向けた負レンズＮＬを有する。負レンズＮＬは、中心から周辺にかけて負の屈折力が強くなるような非球面形状を有する。 The second lens group L2 includes an aperture SP and a variable aperture SSP. The third lens group L3 is a focus lens group that moves toward the image side when focusing from infinity to a close range. The third lens group L3 is composed of a positive lens and a junction lens of a negative lens arranged on the image side of the positive lens. The fourth lens group L4 has a negative lens NL arranged on the most object side, with the concave surface facing the object side and the convex surface facing the image side. The negative lens NL has an aspherical shape in which the negative refractive power becomes stronger from the center to the periphery.
広角端から望遠端へのズーミングに際して、第１レンズ群Ｌ１は像側へ移動し、第２レンズ群Ｌ２、第３レンズ群Ｌ３、および第４レンズ群Ｌ４は物体側へ移動する。また、広角端から望遠端へのズーミングに際して、第１レンズ群Ｌ１と第２レンズ群Ｌ２の間隔は狭まり、第２レンズ群Ｌ２と第３レンズ群Ｌ３の間隔は広がり、第３レンズ群Ｌ３と第４レンズ群Ｌ４の間隔は狭まる。 During zooming from the wide-angle end to the telephoto end, the first lens group L1 moves to the image side, and the second lens group L2, the third lens group L3, and the fourth lens group L4 move to the object side. Further, when zooming from the wide-angle end to the telephoto end, the distance between the first lens group L1 and the second lens group L2 is narrowed, the distance between the second lens group L2 and the third lens group L3 is widened, and the third lens group L3 The distance between the fourth lens group L4 is narrowed.
［実施例３］
図５（ａ）と図５（ｂ）は、それぞれ、実施例３のズームレンズの広角端と望遠端における断面図である。図６（ａ）と図６（ｂ）は、それぞれ、実施例３のズームレンズの広角端と望遠端における収差図である。
[Example 3]
5 (a) and 5 (b) are cross-sectional views of the zoom lens of the third embodiment at the wide-angle end and the telephoto end, respectively. 6 (a) and 6 (b) are aberration diagrams at the wide-angle end and the telephoto end of the zoom lens of the third embodiment, respectively.
実施例３のズームレンズは、物体側から像側へ順に配置された、負の屈折力の第１レンズ群Ｌ１、正の屈折力の第２レンズ群Ｌ２、負の屈折力の第３レンズ群Ｌ３、負の屈折力の第４レンズ群Ｌ４、正の屈折力の第５レンズ群Ｌ５からなる。 The zoom lens of Example 3 has a negative refractive power first lens group L1, a positive refractive power second lens group L2, and a negative refractive power third lens group arranged in order from the object side to the image side. It is composed of L3, a fourth lens group L4 having a negative refractive power, and a fifth lens group L5 having a positive refractive power.
第２レンズ群Ｌ２は、絞りＳＰおよび可変絞りＳＳＰを含む。第３レンズ群Ｌ３は、正レンズと、該正レンズの像側に配置された負レンズとの接合レンズからなる。第３レンズ群Ｌ３は、無限遠から至近距離へのフォーカシングに際して像側へ移動するフォーカスレンズ群である。第４レンズ群Ｌ４は、最も物体側に配置された、物体側に凹面を向け且つ像側に凹面を向けた負レンズＮＬを有する。負レンズＮＬは、中心から周辺にかけて負の屈折力が強くなるような非球面形状を有する。 The second lens group L2 includes an aperture SP and a variable aperture SSP. The third lens group L3 is composed of a positive lens and a junction lens of a negative lens arranged on the image side of the positive lens. The third lens group L3 is a focus lens group that moves toward the image side when focusing from infinity to a close range. The fourth lens group L4 has a negative lens NL arranged on the most object side, with the concave surface facing the object side and the concave surface facing the image side. The negative lens NL has an aspherical shape in which the negative refractive power becomes stronger from the center to the periphery.
広角端から望遠端へのズーミングに際して、第１レンズ群Ｌ１は像側へ移動し、第２レンズ群Ｌ２、第３レンズ群Ｌ３、第４レンズ群Ｌ４、および第５レンズ群Ｌ５は物体側へ移動する。また、広角端から望遠端へのズーミングに際して、第１レンズ群Ｌ１と第２レンズ群ｌ２の間隔は狭まり、第２レンズ群Ｌ２と第３レンズ群Ｌ３の間隔は広がり、第３レンズ群Ｌ３と第４レンズ群Ｌ４の間隔は狭まり、第４レンズ群Ｌ４と第５レンズ群Ｌ５の間隔は広がる。 When zooming from the wide-angle end to the telephoto end, the first lens group L1 moves to the image side, and the second lens group L2, the third lens group L3, the fourth lens group L4, and the fifth lens group L5 move to the object side. Moving. Further, when zooming from the wide-angle end to the telephoto end, the distance between the first lens group L1 and the second lens group l2 is narrowed, the distance between the second lens group L2 and the third lens group L3 is widened, and the third lens group L3 The distance between the fourth lens group L4 is narrowed, and the distance between the fourth lens group L4 and the fifth lens group L5 is widened.
［実施例４］
図７（ａ）と図７（ｂ）は、それぞれ、実施例４のズームレンズの広角端と望遠端における断面図である。図８（ａ）と図８（ｂ）は、それぞれ、実施例４のズームレンズの広角端と望遠端における収差図である。
[Example 4]
7 (a) and 7 (b) are cross-sectional views of the zoom lens of Example 4 at the wide-angle end and the telephoto end, respectively. 8 (a) and 8 (b) are aberration diagrams at the wide-angle end and the telephoto end of the zoom lens of the fourth embodiment, respectively.
実施例４のズームレンズは、物体側から像側へ順に配置された、負の屈折力の第１レンズ群Ｌ１、正の屈折力の第２レンズ群Ｌ２、負の屈折力の第３レンズ群Ｌ３、負の屈折力の第４レンズ群Ｌ４からなる。 The zoom lens of Example 4 has a first lens group L1 having a negative refractive power, a second lens group L2 having a positive refractive power, and a third lens group having a negative refractive power arranged in order from the object side to the image side. It consists of L3 and a fourth lens group L4 having a negative refractive power.
第２レンズ群Ｌ２は、絞りＳＰおよび可変絞りＳＳＰを含む。第３レンズ群Ｌ３は、無限遠から至近距離へのフォーカシングに際して像側へ移動するフォーカスレンズ群である。第３レンズ群Ｌ３は、正レンズと、該正レンズの像側に配置された負レンズとの接合レンズからなる。第４レンズ群Ｌ４は、最も物体側に配置された、物体側に凹面を向け且つ像側に凸面を向けた負レンズＮＬを有する。負レンズＮＬは、中心から周辺にかけて負の屈折力が強くなるような非球面形状を有する。 The second lens group L2 includes an aperture SP and a variable aperture SSP. The third lens group L3 is a focus lens group that moves toward the image side when focusing from infinity to a close range. The third lens group L3 is composed of a positive lens and a junction lens of a negative lens arranged on the image side of the positive lens. The fourth lens group L4 has a negative lens NL arranged on the most object side, with the concave surface facing the object side and the convex surface facing the image side. The negative lens NL has an aspherical shape in which the negative refractive power becomes stronger from the center to the periphery.
広角端から望遠端へのズーミングに際して、第１レンズ群Ｌ１は像側へ移動した後に物体側へ移動し、第２レンズ群Ｌ２、第３レンズ群Ｌ３、および第４レンズ群Ｌ４は物体側へ移動する。また、広角端から望遠端へのズーミングに際して、第１レンズ群Ｌ１と第２レンズ群Ｌ２の間隔は狭まり、第２レンズ群Ｌ２と第３レンズ群Ｌ３の間隔は広がり、第３レンズ群Ｌ３と第４レンズ群Ｌ４の間隔は狭まる。 When zooming from the wide-angle end to the telephoto end, the first lens group L1 moves to the image side and then moves to the object side, and the second lens group L2, the third lens group L3, and the fourth lens group L4 move to the object side. Moving. Further, when zooming from the wide-angle end to the telephoto end, the distance between the first lens group L1 and the second lens group L2 is narrowed, the distance between the second lens group L2 and the third lens group L3 is widened, and the third lens group L3 The distance between the fourth lens group L4 is narrowed.
［実施例５］
図９（ａ）と図９（ｂ）は、それぞれ、実施例５のズームレンズの広角端と望遠端における断面図である。図１０（ａ）と図１０（ｂ）は、それぞれ、実施例５のズームレンズの広角端と望遠端における収差図である。
[Example 5]
9 (a) and 9 (b) are cross-sectional views of the zoom lens of Example 5 at the wide-angle end and the telephoto end, respectively. 10 (a) and 10 (b) are aberration diagrams at the wide-angle end and the telephoto end of the zoom lens of Example 5, respectively.
実施例５のズームレンズは、物体側から像側へ順に配置された、負の屈折力の第１レンズ群Ｌ１、正の屈折力の第２レンズ群Ｌ２、負の屈折力の第３レンズ群Ｌ３、負の屈折力の第４レンズ群Ｌ４、正の屈折力の第５レンズ群Ｌ５、正の屈折力の第６レンズ群Ｌ６からなる。 The zoom lens of Example 5 has a negative refractive power first lens group L1, a positive refractive power second lens group L2, and a negative refractive power third lens group arranged in order from the object side to the image side. It is composed of L3, a fourth lens group L4 having a negative refractive power, a fifth lens group L5 having a positive refractive power, and a sixth lens group L6 having a positive refractive power.
第２レンズ群Ｌ２は、絞りＳＰおよび可変絞りＳＳＰを含む。第３レンズ群Ｌ３は、無限遠から至近距離へのフォーカシングに際して像側へ移動するフォーカスレンズ群である。第３レンズ群Ｌ３は、正レンズと、該正レンズの像側に配置された負レンズとの接合レンズからなる。第４レンズ群Ｌ４は、最も物体側に配置された、物体側に凹面を向け且つ像側に凹面を向けた負レンズＮＬを有する。負レンズＮＬは、中心から周辺にかけて負の屈折力が強くなるような非球面形状を有する。 The second lens group L2 includes an aperture SP and a variable aperture SSP. The third lens group L3 is a focus lens group that moves toward the image side when focusing from infinity to a close range. The third lens group L3 is composed of a positive lens and a junction lens of a negative lens arranged on the image side of the positive lens. The fourth lens group L4 has a negative lens NL arranged on the most object side, with the concave surface facing the object side and the concave surface facing the image side. The negative lens NL has an aspherical shape in which the negative refractive power becomes stronger from the center to the periphery.
広角端から望遠端へのズーミングに際して、第１レンズ群Ｌ１は像側へ移動し、第２レンズ群Ｌ２、第３レンズ群Ｌ３、第４レンズ群Ｌ４、および第５レンズ群Ｌ５は物体側へ移動する。ズーミングに際して、第６レンズ群Ｌ６は不動である。また、広角端から望遠端へのズーミングに際して、第１レンズ群Ｌ１と第２レンズ群Ｌ２の間隔は狭まり、第２レンズ群Ｌ２と第３レンズ群Ｌ３の間隔は広がり、第３レンズ群Ｌ３と第４レンズＬ４群の間隔は狭まり、第４レンズ群Ｌ４と第５レンズ群Ｌ５の間隔は広がり、第５レンズ群Ｌ５と第６レンズ群Ｌ６の間隔は広がる。 When zooming from the wide-angle end to the telephoto end, the first lens group L1 moves to the image side, and the second lens group L2, the third lens group L3, the fourth lens group L4, and the fifth lens group L5 move to the object side. Moving. During zooming, the sixth lens group L6 is immovable. Further, when zooming from the wide-angle end to the telephoto end, the distance between the first lens group L1 and the second lens group L2 is narrowed, the distance between the second lens group L2 and the third lens group L3 is widened, and the third lens group L3 The distance between the 4th lens group L4 is narrowed, the distance between the 4th lens group L4 and the 5th lens group L5 is widened, and the distance between the 5th lens group L5 and the 6th lens group L6 is widened.
［実施例６］
図１１（ａ）と図１１（ｂ）は、それぞれ、実施例６のズームレンズの広角端と望遠端における断面図である。図１２（ａ）と図１２（ｂ）は、それぞれ、実施例６のズームレンズの広角端と望遠端における収差図である。
[Example 6]
11 (a) and 11 (b) are cross-sectional views of the zoom lens of Example 6 at the wide-angle end and the telephoto end, respectively. 12 (a) and 12 (b) are aberration diagrams at the wide-angle end and the telephoto end of the zoom lens of the sixth embodiment, respectively.
実施例６のズームレンズは、物体側から像側へ順に配置された、負の屈折力の第１レンズ群Ｌ１、正の屈折力の第２レンズ群Ｌ２、負の屈折力の第３レンズ群Ｌ３、負の屈折力の第４レンズ群Ｌ４からなる。 The zoom lens of Example 6 has a first lens group L1 having a negative refractive power, a second lens group L2 having a positive refractive power, and a third lens group having a negative refractive power arranged in order from the object side to the image side. It consists of L3 and a fourth lens group L4 having a negative refractive power.
第２レンズ群Ｌ２は、絞りＳＰおよび可変絞りＳＳＰを含む。第３レンズ群Ｌ３と第４レンズ群Ｌ４は、無限遠から至近距離へのフォーカシングに際して、互いに異なる軌跡で像側へ移動するフォーカスレンズ群である。第３レンズ群Ｌ３の移動により合焦し、第４レンズ群の移動により像面湾曲の変化を補償する。 The second lens group L2 includes an aperture SP and a variable aperture SSP. The third lens group L3 and the fourth lens group L4 are focus lens groups that move toward the image side in different trajectories when focusing from infinity to a close distance. Focusing is achieved by the movement of the third lens group L3, and the change in curvature of field is compensated by the movement of the fourth lens group.
第３レンズ群Ｌ３は、正レンズと、該正レンズの像側に配置された負レンズとの接合レンズからなる。第４レンズ群Ｌ４は、最も物体側に配置された、物体側に凹面を向け且つ像側に凸面を向けた負レンズＮＬを有する。負レンズＮＬは、中心から周辺にかけて負の屈折力が強くなるような非球面形状を有する。 The third lens group L3 is composed of a positive lens and a junction lens of a negative lens arranged on the image side of the positive lens. The fourth lens group L4 has a negative lens NL arranged on the most object side, with the concave surface facing the object side and the convex surface facing the image side. The negative lens NL has an aspherical shape in which the negative refractive power becomes stronger from the center to the periphery.
広角端から望遠端へのズーミングに際して、第１レンズ群Ｌ１は像側へ移動し、第２レンズ群Ｌ２、第３レンズ群Ｌ３、および第４レンズ群Ｌ４は物体側へ移動する。また、広角端から望遠端へのズーミングに際して、第１レンズ群Ｌ１と第２レンズ群Ｌ２の間隔は狭まり、第２レンズ群Ｌ２と第３レンズ群Ｌ３の間隔は広がり、第３レンズ群Ｌ３と第４レンズ群Ｌ４の間隔は狭まる。 During zooming from the wide-angle end to the telephoto end, the first lens group L1 moves to the image side, and the second lens group L2, the third lens group L3, and the fourth lens group L4 move to the object side. Further, when zooming from the wide-angle end to the telephoto end, the distance between the first lens group L1 and the second lens group L2 is narrowed, the distance between the second lens group L2 and the third lens group L3 is widened, and the third lens group L3 The distance between the fourth lens group L4 is narrowed.
以上、本発明の好ましい実施例について説明したが、本発明のズームレンズはこれらの実施例に限定されず、その要旨の範囲内で種々の変形および変更が可能である。例えば、ズームレンズのあるレンズ群の全部又は一部を防振レンズ群とし、防振目的で光軸に垂直な方向成分を有する方向に移動させてもよい。例えば、第２レンズ群の全部又は一部を防振レンズ群としてもよい。 Although the preferred embodiments of the present invention have been described above, the zoom lens of the present invention is not limited to these embodiments, and various modifications and changes can be made within the scope of the gist thereof. For example, all or a part of a lens group having a zoom lens may be used as an anti-vibration lens group and may be moved in a direction having a direction component perpendicular to the optical axis for the purpose of anti-vibration. For example, all or part of the second lens group may be used as an anti-vibration lens group.
本発明のズームレンズが、回折光学素子や反射光学部材を含んでいてもよい。 The zoom lens of the present invention may include a diffractive optical element and a reflective optical member.
［数値実施例］
以下に、実施例１～６のそれぞれに対応する数値実施例１～６を示す。数値実施例１～６に関して、条件式（１）～（６）に対応する数値を表１に示す。また、数値実施例１～６において、ｉは物体側からの光学面の順序を示す。ｒは光学面の曲率半径、ｄは光学面の間隔、ｎｄとνｄはそれぞれｄ線に対する光学部材の材料の屈折率、アッベ数を示す。フラウンホーファー線のｇ線（波長４３５．８ｎｍ）、Ｆ線（４８６．１ｎｍ）、ｄ線（５８７．６ｎｍ）、Ｃ線（６５６．３ｎｍ）に対する材料の屈折率をそれぞれＮｇ、ＮＦ、Ｎｄ、ＮＣとする。そして、アッベ数νｄを、
νｄ＝（Ｎｄ－１）／（ＮＦ－ＮＣ）
として表す。ＢＦはバックフォーカスを示す。
[Numerical example]
Hereinafter, numerical examples 1 to 6 corresponding to each of Examples 1 to 6 are shown. Numerical values Table 1 shows the numerical values corresponding to the conditional expressions (1) to (6) with respect to Examples 1 to 6. Further, in the numerical examples 1 to 6, i indicates the order of the optical planes from the object side. r is the radius of curvature of the optical surface, d is the distance between the optical surfaces, and nd and νd are the refractive indexes of the material of the optical member with respect to the d line and the Abbe number, respectively. The refractive index of the material for the Fraunhofer line g-line (wavelength 435.8 nm), F-line (486.1 nm), d-line (587.6 nm), and C-line (656.3 nm) is Ng, NF, Nd, NC, respectively. And. And the Abbe number νd,
νd = (Nd-1) / (NF-NC)
Expressed as. BF indicates back focus.
非球面は各数値実施例中の面番号の右側に＊印を付している。非球面形状は光軸方向にＸ軸、光軸と垂直方向にＨ軸、光の進行方向を正としＲを近軸曲率半径、Ｋを円錐定数、Ａ４、Ａ６、Ａ８、Ａ１０、Ａ１２、Ａ１４、Ａ１６をそれぞれ非球面係数としたとき、 The aspherical surface is marked with * on the right side of the surface number in each numerical example. The aspherical shape is X-axis in the optical axis direction, H-axis in the direction perpendicular to the optical axis, positive in the traveling direction of light, R is the paraxial radius of curvature, K is the conical constant, A4, A6, A8, A10, A12, A14. , A16 are the aspherical coefficients, respectively.
で表している。非球面係数の「ｅ－ｘ」は１０－ｘを意味する。 It is represented by. The aspherical coefficient "ex" means 10- x .
また、前述の各条件式と実施例１～６の関係をそれぞれ［表１］に示す。 Further, the relationship between each of the above-mentioned conditional expressions and Examples 1 to 6 is shown in [Table 1].
［数値実施例１］
面データ
面番号 r d nd vd
1* 443.075 2.40 1.76450 49.1
2* 19.075 8.91
3 213.097 1.90 1.88300 40.8
4* 58.580 3.00
5 -309.039 1.50 1.59522 67.7
6 27.634 4.71 1.85478 24.8
7 229.654 (可変)
8(絞り) ∞ 1.50
9 32.245 0.80 2.00069 25.5
10 15.508 5.62 1.80100 35.0
11 -33.684 1.94
12 -24.367 0.80 2.00100 29.1
13 16.760 5.09 1.80810 22.8
14 -190.175 0.15
15 31.476 8.00 1.53775 74.7
16 -30.820 2.11
17 ∞ 1.00
18 24.403 0.90 2.00069 25.5
19 15.500 8.12 1.49700 81.5
20 -34.361 (可変)
21 -128.102 4.55 1.95906 17.5
22 -18.863 0.90 1.85478 24.8
23 131.391 (可変)
24 -18.030 1.10 1.85400 40.4
25* -96.237 2.47
26 46.162 7.92 1.51633 64.1
27 -71.414 (可変)
像面 ∞
非球面データ
第1面
K = 0.00000e+000 A 4= 7.47034e-005 A 6=-5.04678e-007 A 8= 2.47036e-009 A10=-7.40076e-012 A12= 1.31232e-014 A14=-1.28205e-017 A16= 5.38775e-021
第2面
K = 3.20613e-001 A 4= 5.78546e-005 A 6=-3.10160e-007 A 8=-1.05900e-009 A10= 2.00844e-011 A12=-6.89000e-014 A14= 4.01049e-017
第4面
K = 0.00000e+000 A 4= 1.43656e-005 A 6=-5.64042e-008 A 8= 7.58587e-010 A10=-7.88670e-012 A12= 4.07898e-014 A14=-6.60212e-017
第25面
K = 0.00000e+000 A 4= 3.65124e-005 A 6=-6.61865e-008 A 8= 1.11825e-009 A10=-7.36819e-012 A12= 1.65712e-014
各種データ
ズーム比 2.20
広角 中間 望遠
焦点距離 15.45 24.00 34.00
Ｆナンバー 4.12 4.12 4.12
半画角 54.47 42.03 32.47
像高 21.64 21.64 21.64
レンズ全長 125.38 119.21 116.89
BF 12.00 19.66 24.40
d 7 27.80 11.92 1.50
d20 1.00 1.89 5.83
d23 9.20 10.35 9.78
d27 12.00 19.66 24.40
レンズ群データ
群 始面 焦点距離 レンズ構成長 前側主点位置 後側主点位置
1 1 -20.95 22.42 2.80 -14.45
2 8 23.98 36.04 17.89 -12.25
3 21 -117.83 5.45 0.63 -2.16
4 24 -60.24 11.48 -5.88 -15.46
単レンズデータ
レンズ 始面 焦点距離
1 1 -26.14
2 3 -92.02
3 5 -42.55
4 6 36.36
5 9 -30.59
6 10 13.97
7 12 -9.82
8 13 19.27
9 15 30.32
10 18 -44.71
11 19 22.72
12 21 22.60
13 22 -19.24
14 24 -26.15
15 26 55.58
[Numerical Example 1]
Surface data Surface number rd nd vd
1 * 443.075 2.40 1.76450 49.1
2 * 19.075 8.91
3 213.097 1.90 1.88300 40.8
4 * 58.580 3.00
5 -309.039 1.50 1.59522 67.7
6 27.634 4.71 1.85478 24.8
7 229.654 (variable)
8 (Aperture) ∞ 1.50
9 32.245 0.80 2.00069 25.5
10 15.508 5.62 1.80100 35.0
11 -33.684 1.94
12 -24.367 0.80 2.00100 29.1
13 16.760 5.09 1.80810 22.8
14 -190.175 0.15
15 31.476 8.00 1.53775 74.7
16 -30.820 2.11
17 ∞ 1.00
18 24.403 0.90 2.00069 25.5
19 15.500 8.12 1.49700 81.5
20 -34.361 (variable)
21 -128.102 4.55 1.95906 17.5
22 -18.863 0.90 1.85478 24.8
23 131.391 (variable)
24 -18.030 1.10 1.85400 40.4
25 * -96.237 2.47
26 46.162 7.92 1.51633 64.1
27 -71.414 (variable)
Image plane ∞
First surface of aspherical data
K = 0.00000e + 000 A 4 = 7.47034e-005 A 6 = -5.04678e-007 A 8 = 2.47036e-009 A10 = -7.40076e-012 A12 = 1.31232e-014 A14 = -1.28205e-017 A16 = 5.38775e-021
Second side
K = 3.20613e-001 A 4 = 5.78546e-005 A 6 = -3.10160e-007 A 8 = -1.05900e-009 A10 = 2.00844e-011 A12 = -6.89000e-014 A14 = 4.01049e-017
4th side
K = 0.00000e + 000 A 4 = 1.43656e-005 A 6 = -5.64042e-008 A 8 = 7.58587e-010 A10 = -7.88670e-012 A12 = 4.07898e-014 A14 = -6.60212e-017
25th page
K = 0.00000e + 000 A 4 = 3.65124e-005 A 6 = -6.61865e-008 A 8 = 1.11825e-009 A10 = -7.36819e-012 A12 = 1.65712e-014
Various data Zoom ratio 2.20
Wide-angle medium telephoto focal length 15.45 24.00 34.00
F number 4.12 4.12 4.12
Half angle of view 54.47 42.03 32.47
Image height 21.64 21.64 21.64
Lens total length 125.38 119.21 116.89
BF 12.00 19.66 24.40
d 7 27.80 11.92 1.50
d20 1.00 1.89 5.83
d23 9.20 10.35 9.78
d27 12.00 19.66 24.40
Lens group data group Start surface Focal length Lens configuration length Front principal point position Posterior principal point position
1 1 -20.95 22.42 2.80 -14.45
2 8 23.98 36.04 17.89 -12.25
3 21 -117.83 5.45 0.63 -2.16
4 24 -60.24 11.48 -5.88 -15.46
Single lens data lens Start surface focal length
1 1 -26.14
2 3 -92.02
3 5 -42.55
4 6 36.36
5 9 -30.59
6 10 13.97
7 12 -9.82
8 13 19.27
9 15 30.32
10 18 -44.71
11 19 22.72
12 21 22.60
13 22 -19.24
14 24 -26.15
15 26 55.58
［数値実施例２］
面データ
面番号 r d nd vd
1* 247.015 2.40 1.58313 59.4
2* 13.050 13.07
3* -6276.827 1.60 1.85400 40.4
4* 27.567 0.15
5 30.635 5.97 1.85025 30.1
6 -122.609 (可変)
7(絞り) ∞ 1.00
8 26.596 0.80 2.00069 25.5
9 15.122 5.41 1.57099 50.8
10 -23.330 1.86
11 -19.051 0.80 1.81600 46.6
12 18.177 5.02 1.69895 30.1
13 -37.957 0.15
14 27.397 8.01 1.49700 81.5
15 -36.437 0.50
16 ∞ 2.52
17 42.574 0.90 2.00069 25.5
18 16.711 7.29 1.49700 81.5
19 -26.555 (可変)
20 -222.963 4.21 1.95906 17.5
21 -19.664 0.90 1.85478 24.8
22 81.900 (可変)
23* -14.343 1.40 1.85400 40.4
24* -36.105 1.98
25 45.074 6.05 1.59522 67.7
26 -374.024 (可変)
像面 ∞
非球面データ
第1面
K = 0.00000e+000 A 4= 3.09710e-005 A 6=-1.18306e-007 A 8= 2.22994e-010 A10=-2.29635e-013 A12= 1.08049e-016
第2面
K =-3.49339e-001 A 4= 2.71331e-005 A 6=-9.25199e-009 A 8= 3.95060e-010 A10=-2.47967e-012 A12=-1.44412e-014
第3面
K = 0.00000e+000 A 4=-6.67663e-005 A 6= 8.24005e-007 A 8=-5.80766e-009 A10= 1.78105e-011 A12=-1.96528e-014
第4面
K = 0.00000e+000 A 4=-7.15502e-005 A 6= 8.47009e-007 A 8=-6.89293e-009 A10= 2.63995e-011 A12=-3.62274e-014
第23面
K = 0.00000e+000 A 4= 1.56019e-004 A 6=-7.83135e-007 A 8= 2.50495e-009
第24面
K = 0.00000e+000 A 4= 1.58125e-004 A 6=-1.01327e-006 A 8= 5.44478e-009 A10=-1.87942e-011 A12= 3.00531e-014
各種データ
ズーム比 2.06
広角 中間 望遠
焦点距離 16.48 24.00 34.00
Ｆナンバー 4.12 4.12 4.12
半画角 52.70 42.03 32.47
像高 21.64 21.64 21.64
レンズ全長 127.27 116.39 111.30
BF 10.95 16.82 23.58
d 6 32.68 14.85 1.98
d19 1.00 1.45 3.97
d22 10.67 11.31 9.80
d26 10.95 16.82 23.58
レンズ群データ
群 始面 焦点距離 レンズ構成長 前側主点位置 後側主点位置
1 1 -28.60 23.18 -0.69 -21.43
2 7 25.14 34.25 16.53 -11.75
3 20 -105.52 5.11 1.69 -0.92
4 23 -54.88 9.42 -3.48 -10.43
単レンズデータ
レンズ 始面 焦点距離
1 1 -23.72
2 3 -32.14
3 5 29.35
4 8 -36.29
5 9 16.93
6 11 -11.29
7 12 18.26
8 14 32.83
9 17 -27.98
10 18 21.86
11 20 22.26
12 21 -18.48
13 23 -28.72
14 25 67.95
[Numerical Example 2]
Surface data Surface number rd nd vd
1 * 247.015 2.40 1.58313 59.4
2 * 13.050 13.07
3 * -6276.827 1.60 1.85400 40.4
4 * 27.567 0.15
5 30.635 5.97 1.85025 30.1
6 -122.609 (variable)
7 (Aperture) ∞ 1.00
8 26.596 0.80 2.00069 25.5
9 15.122 5.41 1.57099 50.8
10 -23.330 1.86
11 -19.051 0.80 1.81600 46.6
12 18.177 5.02 1.69895 30.1
13 -37.957 0.15
14 27.397 8.01 1.49700 81.5
15 -36.437 0.50
16 ∞ 2.52
17 42.574 0.90 2.00069 25.5
18 16.711 7.29 1.49700 81.5
19 -26.555 (variable)
20 -222.963 4.21 1.95906 17.5
21 -19.664 0.90 1.85478 24.8
22 81.900 (variable)
23 * -14.343 1.40 1.85400 40.4
24 * -36.105 1.98
25 45.074 6.05 1.59522 67.7
26 -374.024 (variable)
Image plane ∞
First surface of aspherical data
K = 0.00000e + 000 A 4 = 3.09710e-005 A 6 = -1.18306e-007 A 8 = 2.22994e-010 A10 = -2.29635e-013 A12 = 1.08049e-016
Second side
K = -3.49339e-001 A 4 = 2.71331e-005 A 6 = -9.25199e-009 A 8 = 3.95060e-010 A10 = -2.49767e-012 A12 = -1.44412e-014
Third side
K = 0.00000e + 000 A 4 = -6.67663e-005 A 6 = 8.24005e-007 A 8 = -5.80766e-009 A10 = 1.78105e-011 A12 = -1.96528e-014
4th side
K = 0.00000e + 000 A 4 = -7.15502e-005 A 6 = 8.47009e-007 A 8 = -6.89293e-009 A10 = 2.63995e-011 A12 = -3.62274e-014
K = 0.00000e + 000 A 4 = 1.56019e-004 A 6 = -7.83135e-007 A 8 = 2.50495e-009
24th page
K = 0.00000e + 000 A 4 = 1.58125e-004 A 6 = -1.01327e-006 A 8 = 5.44478e-009 A10 = -1.87942e-011 A12 = 3.00531e-014
Various data Zoom ratio 2.06
Wide-angle medium telephoto focal length 16.48 24.00 34.00
F number 4.12 4.12 4.12
Half angle of view 52.70 42.03 32.47
Image height 21.64 21.64 21.64
Lens total length 127.27 116.39 111.30
BF 10.95 16.82 23.58
d 6 32.68 14.85 1.98
d19 1.00 1.45 3.97
d22 10.67 11.31 9.80
d26 10.95 16.82 23.58
Lens group data group Start surface Focal length Lens configuration length Front principal point position Posterior principal point position
1 1 -28.60 23.18 -0.69 -21.43
2 7 25.14 34.25 16.53 -11.75
3 20 -105.52 5.11 1.69 -0.92
4 23 -54.88 9.42 -3.48 -10.43
Single lens data lens Start surface focal length
1 1 -23.72
2 3 -32.14
3 5 29.35
4 8 -36.29
5 9 16.93
6 11 -11.29
7 12 18.26
8 14 32.83
9 17 -27.98
10 18 21.86
11 20 22.26
12 21 -18.48
13 23 -28.72
14 25 67.95
［数値実施例３］
面データ
面番号 r d nd vd
1* ∞ 2.60 1.58313 59.4
2* 14.780 16.89
3* -97.231 2.20 1.85400 40.4
4* 51.561 0.15
5 41.160 7.43 1.85025 30.1
6 -120.385 (可変)
7* 36.166 2.80 1.90366 31.3
8 80.180 2.44
9(絞り) ∞ 1.50
10 44.417 1.20 2.00100 29.1
11 23.126 7.18 1.58144 40.8
12 -56.396 1.00
13 -172.570 1.10 1.90366 31.3
14 20.049 7.15 1.62588 35.7
15 -144.852 0.50
16 ∞ 0.50
17 20.888 1.20 2.00069 25.5
18 15.743 9.60 1.53775 74.7
19 -35.984 (可変)
20 -181.965 5.19 1.92286 18.9
21 -16.735 1.10 1.85478 24.8
22 49.274 (可変)
23* -910.168 1.40 1.85400 40.4
24* 49.564 (可変)
25 67.715 5.32 1.59522 67.7
26 -91.484 (可変)
像面 ∞
非球面データ
第1面
K = 0.00000e+000 A 4= 5.59540e-006 A 6=-7.47862e-009 A 8= 6.45924e-012 A10= 4.98794e-017 A12=-4.60087e-018 A14= 2.61073e-021
第2面
K =-9.91179e-001 A 4= 7.84626e-006 A 6= 2.78798e-008 A 8=-3.97631e-011 A10=-2.66363e-013 A12= 2.01313e-015 A14=-4.48748e-018
第3面
K = 0.00000e+000 A 4=-3.18404e-005 A 6= 1.99834e-007 A 8=-7.67005e-010 A10= 1.36846e-012 A12=-8.85293e-016 A14=-4.82404e-020
第4面
K = 0.00000e+000 A 4=-2.65798e-005 A 6= 2.31313e-007 A 8=-1.04271e-009 A10= 2.65040e-012 A12=-3.32254e-015 A14= 1.81391e-018
第7面
K = 0.00000e+000 A 4=-4.57237e-006 A 6= 4.70972e-009 A 8=-7.59429e-011 A10= 3.10858e-013 A12=-5.87762e-016
第23面
K = 0.00000e+000 A 4=-2.28188e-004 A 6= 1.15319e-006 A 8=-4.31694e-009 A10= 5.16688e-012
第24面
K = 0.00000e+000 A 4=-1.97807e-004 A 6= 1.42978e-006 A 8=-6.32435e-009 A10= 1.83189e-011 A12=-2.48009e-014
各種データ
ズーム比 2.20
広角 中間 望遠
焦点距離 15.45 24.00 34.00
Ｆナンバー 2.91 2.91 2.91
半画角 54.47 42.03 32.47
像高 21.64 21.64 21.64
レンズ全長 145.57 128.97 124.36
BF 13.00 18.88 27.25
d 6 41.03 15.48 0.78
d19 1.00 2.63 4.43
d22 11.29 9.66 7.85
d24 0.80 3.86 5.59
d26 13.00 18.88 27.25
レンズ群データ
群 始面 焦点距離 レンズ構成長 前側主点位置 後側主点位置
1 1 -30.20 29.27 -1.13 -28.11
2 7 27.66 36.17 17.15 -14.25
3 20 -53.93 6.29 2.48 -0.77
4 23 -55.00 1.40 0.72 -0.04
5 25 66.20 5.32 1.44 -1.94
単レンズデータ
レンズ 始面 焦点距離
1 1 -25.35
2 3 -39.19
3 5 36.85
4 7 70.77
5 10 -49.60
6 11 29.18
7 13 -19.82
8 14 28.62
9 17 -72.31
10 18 21.78
11 20 19.67
12 21 -14.50
13 23 -55.00
14 25 66.20
[Numerical Example 3]
Surface data Surface number rd nd vd
1 * ∞ 2.60 1.58313 59.4
2 * 14.780 16.89
3 * -97.231 2.20 1.85400 40.4
4 * 51.561 0.15
5 41.160 7.43 1.85025 30.1
6 -120.385 (variable)
7 * 36.166 2.80 1.90366 31.3
8 80.180 2.44
9 (Aperture) ∞ 1.50
10 44.417 1.20 2.00100 29.1
11 23.126 7.18 1.58144 40.8
12 -56.396 1.00
13 -172.570 1.10 1.90366 31.3
14 20.049 7.15 1.62588 35.7
15 -144.852 0.50
16 ∞ 0.50
17 20.888 1.20 2.00069 25.5
18 15.743 9.60 1.53775 74.7
19 -35.984 (variable)
20 -181.965 5.19 1.92286 18.9
21 -16.735 1.10 1.85478 24.8
22 49.274 (variable)
23 * -910.168 1.40 1.85400 40.4
24 * 49.564 (variable)
25 67.715 5.32 1.59522 67.7
26 -91.484 (variable)
Image plane ∞
First surface of aspherical data
K = 0.00000e + 000 A 4 = 5.59540e-006 A 6 = -7.47862e-009 A 8 = 6.45924e-012 A10 = 4.98794e-017 A12 = -4.60087e-018 A14 = 2.61073e-021
Second side
K = -9.91179e-001 A 4 = 7.84626e-006 A 6 = 2.78798e-008 A 8 = -3.97631e-011 A10 = -2.66633e-013 A12 = 2.01313e-015 A14 = -4.48748e-018
Third side
K = 0.00000e + 000 A 4 = -3.18404e-005 A 6 = 1.99834e-007 A 8 = -7.67005e-010 A10 = 1.36846e-012 A12 = -8.85293e-016 A14 = -4.82404e-020
4th side
K = 0.00000e + 000 A 4 = -2.65798e-005 A 6 = 2.31313e-007 A 8 = -1.04271e-009 A10 = 2.65040e-012 A12 = -3.32254e-015 A14 = 1.81391e-018
Page 7
K = 0.00000e + 000 A 4 = -4.57237e-006 A 6 = 4.70972e-009 A 8 = -7.59429e-011 A10 = 3.10858e-013 A12 = -5.87762e-016
K = 0.00000e + 000 A 4 = -2.28188e-004 A 6 = 1.15319e-006 A 8 = -4.31694e-009 A10 = 5.16688e-012
24th page
K = 0.00000e + 000 A 4 = -1.97807e-004 A 6 = 1.42978e-006 A 8 = -6.32435e-009 A10 = 1.83189e-011 A12 = -2.48009e-014
Various data Zoom ratio 2.20
Wide-angle medium telephoto focal length 15.45 24.00 34.00
F number 2.91 2.91 2.91
Half angle of view 54.47 42.03 32.47
Image height 21.64 21.64 21.64
Lens total length 145.57 128.97 124.36
BF 13.00 18.88 27.25
d 6 41.03 15.48 0.78
d19 1.00 2.63 4.43
d22 11.29 9.66 7.85
d24 0.80 3.86 5.59
d26 13.00 18.88 27.25
Lens group data group Start surface Focal length Lens configuration length Front principal point position Posterior principal point position
1 1 -30.20 29.27 -1.13 -28.11
2 7 27.66 36.17 17.15 -14.25
3 20 -53.93 6.29 2.48 -0.77
4 23 -55.00 1.40 0.72 -0.04
5 25 66.20 5.32 1.44 -1.94
Single lens data lens Start surface focal length
1 1 -25.35
2 3 -39.19
3 5 36.85
4 7 70.77
5 10 -49.60
6 11 29.18
7 13 -19.82
8 14 28.62
9 17 -72.31
10 18 21.78
11 20 19.67
12 21 -14.50
13 23 -55.00
14 25 66.20
［数値実施例４］
面データ
面番号 r d nd vd
1* 143.340 2.40 1.58313 59.4
2* 11.994 12.00
3* -124.735 1.60 1.85400 40.4
4* 39.214 0.15
5 25.213 4.46 1.85478 24.8
6 178.652 (可変)
7(絞り) ∞ 1.00
8 26.889 0.80 2.00100 29.1
9 14.354 5.05 1.68893 31.1
10 -51.305 1.96
11 -35.445 0.80 1.95375 32.3
12 17.480 5.13 1.64769 33.8
13 -48.014 0.15
14 28.487 6.86 1.49700 81.5
15 -44.330 0.50
16 ∞ 1.00
17 28.013 0.90 2.00069 25.5
18 16.714 9.07 1.49700 81.5
19 -25.294 (可変)
20 -133.728 5.51 1.95906 17.5
21 -16.217 0.90 1.85478 24.8
22 77.056 (可変)
23* -18.950 1.40 1.85400 40.4
24* -70.869 3.27
25 44.895 5.45 1.61700 62.8
26 485.511 (可変)
像面 ∞
非球面データ
第1面
K = 0.00000e+000 A 4= 3.58873e-005 A 6=-1.23495e-007 A 8= 2.24426e-010 A10=-2.26306e-013 A12= 1.16852e-016
第2面
K =-5.82737e-001 A 4= 3.41563e-005 A 6= 1.71808e-007 A 8=-8.64499e-010 A10= 6.66511e-012 A12=-4.24157e-014
第3面
K = 0.00000e+000 A 4=-2.40460e-005 A 6= 4.91830e-007 A 8=-4.67545e-009 A10= 1.73591e-011 A12=-2.26114e-014
第4面
K = 0.00000e+000 A 4=-9.73262e-006 A 6= 4.69843e-007 A 8=-5.25301e-009 A10= 2.45506e-011 A12=-3.40969e-014
第23面
K = 0.00000e+000 A 4=-3.48655e-005 A 6= 3.83694e-007 A 8=-2.51596e-009
第24面
K = 0.00000e+000 A 4= 3.74319e-006 A 6= 3.92193e-007 A 8=-2.27991e-009 A10= 4.62071e-012 A12=-1.31306e-015
各種データ
ズーム比 2.06
広角 中間 望遠
焦点距離 16.48 24.00 34.00
Ｆナンバー 4.12 4.12 4.12
半画角 52.70 42.03 32.47
像高 21.64 21.64 21.64
レンズ全長 121.42 114.74 116.30
BF 12.00 19.01 28.83
d 6 27.27 13.10 4.39
d19 1.00 2.48 3.49
d22 10.81 9.80 9.23
d26 12.00 19.01 28.83
レンズ群データ
群 始面 焦点距離 レンズ構成長 前側主点位置 後側主点位置
1 1 -23.16 20.61 1.48 -15.52
2 7 23.09 33.22 17.22 -9.83
3 20 -83.81 6.41 1.54 -1.71
4 23 -54.19 10.12 -2.98 -10.71
単レンズデータ
レンズ 始面 焦点距離
1 1 -22.60
2 3 -34.78
3 5 33.89
4 8 -31.78
5 9 16.81
6 11 -12.18
7 12 20.41
8 14 36.02
9 17 -43.13
10 18 21.81
11 20 18.81
12 21 -15.60
13 23 -30.67
14 25 79.80
[Numerical Example 4]
Surface data Surface number rd nd vd
1 * 143.340 2.40 1.58313 59.4
2 * 11.994 12.00
3 * -124.735 1.60 1.85400 40.4
4 * 39.214 0.15
5 25.213 4.46 1.85478 24.8
6 178.652 (variable)
7 (Aperture) ∞ 1.00
8 26.889 0.80 2.00100 29.1
9 14.354 5.05 1.68893 31.1
10 -51.305 1.96
11 -35.445 0.80 1.95375 32.3
12 17.480 5.13 1.64769 33.8
13 -48.014 0.15
14 28.487 6.86 1.49700 81.5
15 -44.330 0.50
16 ∞ 1.00
17 28.013 0.90 2.00069 25.5
18 16.714 9.07 1.49700 81.5
19 -25.294 (variable)
20 -133.728 5.51 1.95906 17.5
21 -16.217 0.90 1.85478 24.8
22 77.056 (variable)
23 * -18.950 1.40 1.85400 40.4
24 * -70.869 3.27
25 44.895 5.45 1.61700 62.8
26 485.511 (variable)
Image plane ∞
First surface of aspherical data
K = 0.00000e + 000 A 4 = 3.58873e-005 A 6 = -1.23495e-007 A 8 = 2.24426e-010 A10 = -2.26306e-013 A12 = 1.16852e-016
Second side
K = -5.82737e-001 A 4 = 3.41563e-005 A 6 = 1.71808e-007 A 8 =-8.64499e-010 A10 = 6.66511e-012 A12 = -4.24157e-014
Third side
K = 0.00000e + 000 A 4 = -2.40460e-005 A 6 = 4.91830e-007 A 8 = -4.67545e-009 A10 = 1.73591e-011 A12 = -2.26114e-014
4th side
K = 0.00000e + 000 A 4 = -9.73262e-006 A 6 = 4.69843e-007 A 8 = -5.25301e-009 A10 = 2.45506e-011 A12 = -3.49699e-014
K = 0.00000e + 000 A 4 = -3.48655e-005 A 6 = 3.83694e-007 A 8 = -2.51596e-009
24th page
K = 0.00000e + 000 A 4 = 3.74319e-006 A 6 = 3.92193e-007 A 8 = -2.27991e-009 A10 = 4.62071e-012 A12 = -1.31306e-015
Various data Zoom ratio 2.06
Wide-angle medium telephoto focal length 16.48 24.00 34.00
F number 4.12 4.12 4.12
Half angle of view 52.70 42.03 32.47
Image height 21.64 21.64 21.64
Lens total length 121.42 114.74 116.30
BF 12.00 19.01 28.83
d 6 27.27 13.10 4.39
d19 1.00 2.48 3.49
d22 10.81 9.80 9.23
d26 12.00 19.01 28.83
Lens group data group Start surface Focal length Lens configuration length Front principal point position Posterior principal point position
1 1 -23.16 20.61 1.48 -15.52
2 7 23.09 33.22 17.22 -9.83
3 20 -83.81 6.41 1.54 -1.71
4 23 -54.19 10.12 -2.98 -10.71
Single lens data lens Start surface focal length
1 1 -22.60
2 3 -34.78
3 5 33.89
4 8 -31.78
5 9 16.81
6 11 -12.18
7 12 20.41
8 14 36.02
9 17 -43.13
10 18 21.81
11 20 18.81
12 21 -15.60
13 23 -30.67
14 25 79.80
［数値実施例５］
単位 mm
面データ
面番号 r d nd vd 有効径
1* ∞ 2.60 1.69350 53.2 57.27
2* 18.329 12.12 42.02
3* ∞ 2.20 1.85400 40.4 40.00
4* 280.051 3.00 35.66
5 -78.143 1.40 1.61800 63.3 35.58
6 78.202 0.15 35.21
7 42.294 5.57 1.85478 24.8 35.57
8 451.582 (可変) 34.92
9* 68.407 3.01 1.80400 46.6 22.37
10 -140.601 8.97 22.58
11(絞り) ∞ 1.20 23.49
12 131.635 1.20 2.00100 29.1 23.66
13 26.824 5.85 1.80518 25.4 23.52
14 -117.449 1.00 23.67
15 -320.954 1.10 2.00069 25.5 23.59
16 27.085 6.17 1.51905 54.6 23.63
17 -50.121 0.50 24.29
18 ∞ 2.63 24.80
19 26.036 1.20 2.00100 29.1 26.32
20 18.097 9.41 1.65160 58.5 25.11
21 -45.022 (可変) 24.67
22 225.603 4.67 1.95906 17.5 21.81
23 -25.972 1.00 1.85478 24.8 21.61
24 30.023 (可変) 20.79
25* -229.622 1.40 1.85400 40.4 24.03
26 66.941 (可変) 26.10
27 48.941 4.94 1.59522 67.7 33.66
28 731.974 (可変) 34.54
29 -636.057 4.57 1.69680 55.5 39.26
30 -70.822 11.00 40.01
像面 ∞
非球面データ
第1面
K = 0.00000e+000 A 4= 6.87072e-006 A 6=-1.53892e-008 A 8= 3.02887e-011 A10=-2.50051e-014 A12= 7.56634e-018
第2面
K =-2.78028e+000 A 4= 3.07724e-005 A 6=-8.97150e-008 A 8= 8.71627e-011 A10=-7.10698e-014
第3面
K = 0.00000e+000 A 4=-5.74635e-005 A 6= 9.59268e-008 A 8= 2.36672e-010 A10=-8.05912e-013 A12= 6.16498e-016
第4面
K = 0.00000e+000 A 4=-4.50428e-005 A 6= 1.55564e-007 A 8=-8.76130e-012 A10=-1.15575e-013 A12= 1.92346e-016
第9面
K = 0.00000e+000 A 4=-4.99220e-006 A 6= 4.65954e-009 A 8=-1.91748e-011
第25面
K = 0.00000e+000 A 4=-2.71326e-005 A 6=-7.49757e-009 A 8=-4.82275e-010
各種データ
ズーム比 2.20
広角 中間 望遠
焦点距離 15.45 23.29 33.95
Ｆナンバー 2.92 2.92 2.92
半画角 54.47 42.89 32.51
像高 21.64 21.64 21.64
レンズ全長 152.24 136.06 133.89
BF 11.00 11.00 11.00
d 8 39.15 14.97 0.78
d21 1.00 5.25 8.38
d24 12.17 7.92 4.78
d26 1.50 5.82 6.86
d28 1.56 5.25 16.22
レンズ群データ
群 始面 焦点距離 レンズ構成長 前側主点位置 後側主点位置
1 1 -26.42 27.05 1.29 -20.94
2 9 29.72 42.24 26.07 -16.65
3 22 -50.43 5.67 3.70 0.73
4 25 -60.56 1.40 0.58 -0.17
5 27 87.88 4.94 -0.22 -3.31
6 29 114.00 4.57 3.02 0.34
単レンズデータ
レンズ 始面 焦点距離
1 1 -26.43
2 3 -327.06
3 5 -63.03
4 7 54.25
5 9 57.61
6 12 -33.85
7 13 27.62
8 15 -24.92
9 16 34.83
10 19 -64.14
11 20 21.05
12 22 24.51
13 23 -16.16
14 25 -60.56
15 27 87.88
16 29 114.00
[Numerical Example 5]
Unit mm
Surface data Surface number rd nd vd Effective diameter
1 * ∞ 2.60 1.69350 53.2 57.27
2 * 18.329 12.12 42.02
3 * ∞ 2.20 1.85400 40.4 40.00
4 * 280.051 3.00 35.66
5 -78.143 1.40 1.61800 63.3 35.58
6 78.202 0.15 35.21
7 42.294 5.57 1.85478 24.8 35.57
8 451.582 (variable) 34.92
9 * 68.407 3.01 1.80400 46.6 22.37
10 -140.601 8.97 22.58
11 (Aperture) ∞ 1.20 23.49
12 131.635 1.20 2.00100 29.1 23.66
13 26.824 5.85 1.80518 25.4 23.52
14 -117.449 1.00 23.67
15 -320.954 1.10 2.00069 25.5 23.59
16 27.085 6.17 1.51905 54.6 23.63
17 -50.121 0.50 24.29
18 ∞ 2.63 24.80
19 26.036 1.20 2.00100 29.1 26.32
20 18.097 9.41 1.65160 58.5 25.11
21 -45.022 (variable) 24.67
22 225.603 4.67 1.95906 17.5 21.81
23 -25.972 1.00 1.85478 24.8 21.61
24 30.023 (variable) 20.79
25 * -229.622 1.40 1.85400 40.4 24.03
26 66.941 (variable) 26.10
27 48.941 4.94 1.59522 67.7 33.66
28 731.974 (variable) 34.54
29 -636.057 4.57 1.69680 55.5 39.26
30 -70.822 11.00 40.01
Image plane ∞
First surface of aspherical data
K = 0.00000e + 000 A 4 = 6.87072e-006 A 6 = -1.53892e-008 A 8 = 3.02887e-011 A10 = -2.50051e-014 A12 = 7.56634e-018
Second side
K = -2.708028e + 000 A 4 = 3.07724e-005 A 6 = -8.97150e-008 A 8 = 8.71627e-011 A10 = -7.10698e-014
Third side
K = 0.00000e + 000 A 4 = -5.74635e-005 A 6 = 9.59268e-008 A 8 = 2.36672e-010 A10 = -8.05912e-013 A12 = 6.16498e-016
4th side
K = 0.00000e + 000 A 4 = -4.50428e-005 A 6 = 1.55564e-007 A 8 =-8.76130e-012 A10 = -1.15575e-013 A12 = 1.92346e-016
Side 9
K = 0.00000e + 000 A 4 = -4.99220e-006 A 6 = 4.65954e-009 A 8 = -1.91748e-011
25th page
K = 0.00000e + 000 A 4 = -2.71326e-005 A 6 = -7.49757e-009 A 8 = -4.82275e-010
Various data Zoom ratio 2.20
Wide-angle medium telephoto focal length 15.45 23.29 33.95
F number 2.92 2.92 2.92
Half angle of view 54.47 42.89 32.51
Image height 21.64 21.64 21.64
Lens total length 152.24 136.06 133.89
BF 11.00 11.00 11.00
d 8 39.15 14.97 0.78
d21 1.00 5.25 8.38
d24 12.17 7.92 4.78
d26 1.50 5.82 6.86
d28 1.56 5.25 16.22
Lens group data group Start surface Focal length Lens configuration length Front principal point position Posterior principal point position
1 1 -26.42 27.05 1.29 -20.94
2 9 29.72 42.24 26.07 -16.65
3 22 -50.43 5.67 3.70 0.73
4 25 -60.56 1.40 0.58 -0.17
5 27 87.88 4.94 -0.22 -3.31
6 29 114.00 4.57 3.02 0.34
Single lens data lens Start surface focal length
1 1 -26.43
2 3 -327.06
3 5 -63.03
4 7 54.25
5 9 57.61
6 12 -33.85
7 13 27.62
8 15-24.92
9 16 34.83
10 19 -64.14
11 20 21.05
12 22 24.51
13 23 -16.16
14 25 -60.56
15 27 87.88
16 29 114.00
［数値実施例６］
単位 mm
面データ
面番号 r d nd vd 有効径
1* 19994.471 2.40 1.76450 49.1 45.63
2* 20.266 8.04 32.13
3 80.884 1.90 1.88300 40.8 31.95
4* 34.611 3.00 28.57
5 94.878 1.50 1.59522 67.7 28.33
6 21.816 5.50 1.85478 24.8 26.27
7 78.445 (可変) 25.09
8(絞り) ∞ 1.50 14.37
9 29.888 0.80 2.00069 25.5 15.41
10 13.906 5.81 1.79682 32.7 15.27
11 -31.465 1.94 15.46
12 -21.965 0.80 2.00100 29.1 15.02
13 16.986 4.81 1.80810 22.8 15.95
14 -1178.944 0.15 17.01
15 33.664 6.93 1.53775 74.7 18.05
16 -24.820 2.42 19.90
17 ∞ 1.00 21.37
18 22.904 0.90 2.00069 25.5 22.68
19 14.976 8.88 1.49700 81.5 21.66
20 -34.875 (可変) 21.98
21 -283.637 5.00 1.95906 17.5 21.62
22 -18.411 0.90 1.85478 24.8 21.56
23 85.683 (可変) 20.96
24 -18.235 1.10 1.85400 40.4 20.92
25* -95.271 4.05 23.55
26 49.527 7.06 1.59522 67.7 35.86
27 -111.896 (可変) 36.78
像面 ∞
非球面データ
第1面
K = 0.00000e+000 A 4= 8.28189e-005 A 6=-5.68498e-007 A 8= 2.66614e-009 A10=-7.68410e-012 A12= 1.31490e-014 A14=-1.23709e-017 A16= 4.96477e-021
第2面
K = 3.74402e-001 A 4= 6.29521e-005 A 6=-2.43558e-007 A 8=-2.44403e-009 A10= 2.92659e-011 A12=-1.03941e-013 A14= 1.08083e-016
第4面
K = 0.00000e+000 A 4= 1.50294e-005 A 6=-1.52662e-007 A 8= 2.29319e-009 A10=-1.99314e-011 A12= 8.51505e-014 A14=-1.29267e-016
第25面
K = 0.00000e+000 A 4= 3.92199e-005 A 6=-1.14262e-007 A 8= 1.64076e-009 A10=-1.05360e-011 A12= 2.34446e-014
各種データ
ズーム比 2.20
広角 中間 望遠
焦点距離 15.45 23.25 34.00
Ｆナンバー 4.12 4.12 4.12
半画角 54.47 42.94 32.47
像高 21.64 21.64 21.64
レンズ全長 125.79 119.96 117.30
BF 12.00 19.22 24.17
d 7 28.35 13.49 2.01
d20 1.00 1.44 5.30
d23 8.04 9.42 9.43
d27 12.00 19.22 24.17
レンズ群データ
群 始面 焦点距離 レンズ構成長 前側主点位置 後側主点位置
1 1 -21.14 22.34 3.03 -13.34
2 8 23.98 35.94 18.13 -12.11
3 21 -129.54 5.90 2.04 -0.97
4 24 -60.21 12.21 -6.47 -17.09
単レンズデータ
レンズ 始面 焦点距離
1 1 -26.54
2 3 -69.86
3 5 -47.96
4 6 33.84
5 9 -26.66
6 10 12.83
7 12 -9.47
8 13 20.76
9 15 27.72
10 18 -45.84
11 19 22.41
12 21 20.34
13 22 -17.66
14 24 -26.58
15 26 58.64
[Numerical Example 6]
Unit mm
Surface data Surface number rd nd vd Effective diameter
1 * 19994.471 2.40 1.76450 49.1 45.63
2 * 20.266 8.04 32.13
3 80.884 1.90 1.88300 40.8 31.95
4 * 34.611 3.00 28.57
5 94.878 1.50 1.59522 67.7 28.33
6 21.816 5.50 1.85478 24.8 26.27
7 78.445 (variable) 25.09
8 (Aperture) ∞ 1.50 14.37
9 29.888 0.80 2.00069 25.5 15.41
10 13.906 5.81 1.79682 32.7 15.27
11 -31.465 1.94 15.46
12 -21.965 0.80 2.00100 29.1 15.02
13 16.986 4.81 1.80810 22.8 15.95
14 -1178.944 0.15 17.01
15 33.664 6.93 1.53775 74.7 18.05
16 -24.820 2.42 19.90
17 ∞ 1.00 21.37
18 22.904 0.90 2.00069 25.5 22.68
19 14.976 8.88 1.49700 81.5 21.66
20 -34.875 (variable) 21.98
21 -283.637 5.00 1.95906 17.5 21.62
22 -18.411 0.90 1.85478 24.8 21.56
23 85.683 (variable) 20.96
24 -18.235 1.10 1.85400 40.4 20.92
25 * -95.271 4.05 23.55
26 49.527 7.06 1.59522 67.7 35.86
27 -111.896 (variable) 36.78
Image plane ∞
First surface of aspherical data
K = 0.00000e + 000 A 4 = 8.28189e-005 A 6 = -5.68498e-007 A 8 = 2.66614e-009 A10 = -7.68410e-012 A12 = 1.31490e-014 A14 = -1.23709e-017 A16 = 4.96477e-021
Second side
K = 3.74402e-001 A 4 = 6.29521e-005 A 6 = -2.43558e-007 A 8 = -2.44403e-009 A10 = 2.92659e-011 A12 = -1.03941e-013 A14 = 1.08083e-016
4th side
K = 0.00000e + 000 A 4 = 1.50294e-005 A 6 = -1.52662e-007 A 8 = 2.29319e-009 A10 = -1.999314e-011 A12 = 8.51505e-014 A14 = -1.29267e-016
25th page
K = 0.00000e + 000 A 4 = 3.92199e-005 A 6 = -1.14262e-007 A 8 = 1.64076e-009 A10 = -1.05360e-011 A12 = 2.34446e-014
Various data Zoom ratio 2.20
Wide-angle medium telephoto focal length 15.45 23.25 34.00
F number 4.12 4.12 4.12
Half angle of view 54.47 42.94 32.47
Image height 21.64 21.64 21.64
Lens total length 125.79 119.96 117.30
BF 12.00 19.22 24.17
d 7 28.35 13.49 2.01
d20 1.00 1.44 5.30
d23 8.04 9.42 9.43
d27 12.00 19.22 24.17
Lens group data group Start surface Focal length Lens configuration length Front principal point position Posterior principal point position
1 1 -21.14 22.34 3.03 -13.34
2 8 23.98 35.94 18.13 -12.11
3 21 -129.54 5.90 2.04 -0.97
4 24 -60.21 12.21 -6.47 -17.09
Single lens data lens Start surface focal length
1 1 -26.54
2 3 -69.86
3 5 -47.96
4 6 33.84
5 9 -26.66
6 10 12.83
7 12 -9.47
8 13 20.76
9 15 27.72
10 18 -45.84
11 19 22.41
12 21 20.34
13 22 -17.66
14 24 -26.58
15 26 58.64
［撮像装置の実施例］
次に、本発明の光学系を撮像光学系として用いた撮像装置の実施例について図１３を用いて説明する。撮像装置１００は、例えば、デジタルスチルカメラ、ビデオカメラ、監視カメラ、放送用カメラ等の撮像素子を用いた撮像装置、または銀塩写真フィルムを用いたカメラ等の撮像装置である。
[Example of an image pickup device]
Next, an example of an image pickup apparatus using the optical system of the present invention as an image pickup optical system will be described with reference to FIG. The
図１３において、カメラ本体２０は、実施例１～６で説明したいずれかの光学系である撮影光学系２１と、カメラ本体２０に内蔵され且つ撮影光学系２１によって形成された被写体像を受光する固体撮像素子（光電変換素子）２２とを有する。固体撮像素子２２は、例えばＣＣＤセンサやＣＭＯＳセンサ等である。メモリ２３は撮像素子２２が受光した被写体像を記録する記録手段である。ファインダー２４は、撮像素子２２上に形成された被写体像であって、表示素子（不図示）に表示された被写体像を観察するためのファインダーである。
In FIG. 13, the
このように本発明の光学系をデジタルスチルカメラ等の撮像装置に適用することにより、小型で、無限遠から至近距離まで高い光学性能を有する撮像装置を得ることができる。 By applying the optical system of the present invention to an image pickup device such as a digital still camera in this way, it is possible to obtain an image pickup device that is compact and has high optical performance from infinity to a close distance.
Ｌ１ 第１レンズ群
Ｌ２ 第２レンズ群
Ｌ３ 第３レンズ群
Ｌ４ 第４レンズ群
L1 1st lens group L2 2nd lens group L3 3rd lens group L4 4th lens group
Claims (13)
前記第１レンズ群の焦点距離をｆ１、前記第２レンズ群の焦点距離をｆ２、前記第３レンズ群の焦点距離をｆ３、前記第４レンズ群の焦点距離をｆ４とするとき、
０．８０＜ｆ３／ｆ４≦２．１５
０．３０＜ｆ２／｜ｆ４｜≦０．５０
０．５０＜｜ｆ１｜／ｆ２≦１．１４
の条件式を満たすことを特徴とするズームレンズ。 The first lens group having a negative refractive power arranged on the most object side, the second lens group having a positive refractive power arranged adjacent to the image side of the first lens group, and the image side of the second lens group. It has a third lens group with a negative refractive power arranged adjacent to the lens and a fourth lens group with a negative refractive power arranged adjacent to the image side of the third lens group , and the lenses are adjacent to each other during zooming. A zoom lens that changes the distance between groups.
When the focal length of the first lens group is f1, the focal length of the second lens group is f2, the focal length of the third lens group is f3, and the focal length of the fourth lens group is f4.
0.80 <f3 / f4 ≤ 2.15
0.30 <f2 / | f4 | ≦ 0.50
0.50 << f1 | / f2≤1.14
A zoom lens characterized by satisfying the conditional expression of.
０．５０＜｜ｍ２｜／ｆｗ＜１．４０
の条件式を満たすことを特徴とする請求項１に記載のズームレンズ。 The focal length of the zoom lens at the wide-angle end is fw, the movement amount of the second lens group in zooming from the wide-angle end to the telephoto end is m2, and the sign of the movement amount of the lens group is an image at the telephoto end as compared with the wide-angle end. When it is located on the side, it is positive, and when it is located on the object side at the telephoto end compared to the wide-angle end, it is negative.
0.50 << | m2 | / fw <1.40
The zoom lens according to claim 1, wherein the zoom lens satisfies the conditional expression of.
ｆｔ／ｆｗ＞１．８０
の条件式を満たすことを特徴とする請求項１または２に記載のズームレンズ。 When the focal length of the zoom lens at the wide-angle end is fw and the focal length of the zoom lens at the telephoto end is ft.
ft / fw> 1.80
The zoom lens according to claim 1 or 2 , wherein the zoom lens satisfies the conditional expression of.
１．００＜｜ｆ４｜／ｆｗ＜４．５０
の条件式を満たすことを特徴とする請求項１乃至３のいずれか１項に記載のズームレンズ。 When the focal length of the zoom lens at the wide-angle end is fw,
1.00 << | f4 | / fw <4.50
The zoom lens according to any one of claims 1 to 3 , wherein the zoom lens satisfies the conditional expression of.
前記ズームレンズによって形成された像を受光する撮像素子とを有することを特徴とする撮像装置。 The zoom lens according to any one of claims 1 to 12 , and the zoom lens.
An image pickup device comprising an image pickup element that receives an image formed by the zoom lens.
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| WO2020203053A1 (en) | 2019-03-29 | 2020-10-08 | ソニー株式会社 | Light emitting device, display device, and electronic instrument |
| JP7542965B2 (en) * | 2020-02-28 | 2024-09-02 | 株式会社タムロン | Zoom lens and imaging device |
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