JP2017026797A - Zoom lens and imaging apparatus having the same - Google Patents
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本発明はズームレンズ及びそれを有する撮像装置に関し、放送用テレビカメラ、ビデオカメラ、デジタルスチルカメラ、銀塩写真用カメラ等に好適なものである。 The present invention relates to a zoom lens and an image pickup apparatus having the same, and is suitable for broadcasting television cameras, video cameras, digital still cameras, silver salt photography cameras, and the like.
近年、テレビカメラ、銀塩フィルム用カメラ、デジタルカメラ、ビデオカメラ等の撮像装置には、高ズーム比、広画角でしかも高い光学性能を有したズームレンズが要望されている。高ズーム比、広画角のズームレンズとして、最も物体側に正の屈折力のレンズ群を配置し、全体として4つのレンズ群より成るポジティブリード型の4群ズームレンズが知られている。 In recent years, zoom lenses having a high zoom ratio, a wide angle of view, and high optical performance have been demanded for imaging devices such as television cameras, cameras for silver salt films, digital cameras, and video cameras. As a zoom lens having a high zoom ratio and a wide angle of view, a positive lead type four-unit zoom lens having a lens unit having a positive refractive power closest to the object side and including four lens units as a whole is known.
この4群ズームレンズとして、物体側から像側へ順に合焦用の第1レンズ群、変倍用の負の屈折力の第2レンズ群、変倍に伴う像面変動を補正するための負の屈折力の第3レンズ群、結像用の正の屈折力の第4レンズ群が知られている。このタイプの4群ズームレンズにおいて、高ズーム比化及び広画角化を図った4群ズームレンズが知られている(特許文献1〜5)。特許文献1〜5では、ズーム比10〜14倍程度、広角端の撮像画角90°〜110°程度のズームレンズが提案されている。 As this four-group zoom lens, in order from the object side to the image side, a first lens unit for focusing, a second lens unit having a negative refractive power for zooming, and a negative lens for correcting image plane fluctuations accompanying zooming A third lens group having a refractive power of 4 mm and a fourth lens group having a positive refractive power for imaging are known. In this type of four-group zoom lens, a four-group zoom lens with a high zoom ratio and a wide angle of view is known (Patent Documents 1 to 5). In Patent Documents 1 to 5, zoom lenses having a zoom ratio of about 10 to 14 times and an imaging field angle of about 90 ° to 110 ° at the wide angle end are proposed.
前述したポジティブリード型の4群ズームレンズは高ズーム比、広画角化が比較的容易である。しかしながらズーム比が10倍以上の高ズーム比、そして撮影画角100度以上の広画角化になると、全ズーム領域及び全物体距離範囲にわたり高い光学性能を得るのが難しくなってくる。例えば望遠側のズーム位置では球面収差及び軸上色収差が多く発生してくる。 The positive lead type four-group zoom lens described above is relatively easy to achieve a high zoom ratio and a wide angle of view. However, when the zoom ratio is a high zoom ratio of 10 times or more and the field angle of view is 100 degrees or more, it becomes difficult to obtain high optical performance over the entire zoom region and the entire object distance range. For example, a large amount of spherical aberration and axial chromatic aberration occur at the zoom position on the telephoto side.
また、全物体距離範囲にわたり高い光学性能を得るにはフォーカシングに際して収差変動が少ないことが重要になってくる。高ズーム比で、しかもフォーカシングに際して収差変動が少ない小型のズームレンズを得るには、ズーミングに際して移動させるレンズ群やフォーカシングに際して移動させるレンズ群等の構成を適切に構成することが重要になってくる。 Also, in order to obtain high optical performance over the entire object distance range, it is important that there is little aberration fluctuation during focusing. In order to obtain a small zoom lens having a high zoom ratio and small aberration fluctuation during focusing, it is important to appropriately configure the lens group that is moved during zooming, the lens group that is moved during focusing, and the like.
例えば前述した4群ズームレンズにおいて第1レンズ群の一部のレンズ群でフォーカシングするときには第1レンズ群のレンズ構成を適切に設定することが重要になってくる。このときの構成が不適切であると高ズーム比及び高画角化を図りつつ、全物体距離範囲にわたり高い光学性能を有するズームレンズを得るのが難しくなってくる。 For example, in the above-described four-group zoom lens, when focusing with a part of the first lens group, it is important to appropriately set the lens configuration of the first lens group. If the configuration at this time is inappropriate, it becomes difficult to obtain a zoom lens having high optical performance over the entire object distance range while achieving a high zoom ratio and a high angle of view.
本発明は、高ズーム比及び広画角で、全物体距離範囲において高い光学性能を有するズームレンズ及びそれを有する撮像装置の提供を目的とする。 An object of the present invention is to provide a zoom lens having a high zoom ratio and a wide angle of view, and a high optical performance in the entire object distance range, and an imaging apparatus having the same.
本発明のズームレンズは、物体側から像側へ順に、ズーミングに際して不動で正の屈折力の第1レンズ群、ズーミングに際して移動する負の屈折力の第2レンズ群、ズーミングに際して移動する負の屈折力の第3レンズ群、ズーミングに際して不動の正の屈折力の第4レンズ群より構成されるズームレンズであって、
前記第1レンズ群は、物体側から像側へ順にフォーカシングに際して不動の負の屈折力の第1部分群、フォーカシングに際して移動する正の屈折力の第2部分群、フォーカシングに際して不動の正の屈折力の第3部分群より構成され、
前記第1部分群の焦点距離をf11、第3部分群の焦点距離をf13、前記第1レンズ群の焦点距離をf1とするとき、
−0.60<f11/f13<−0.40
−1.20<f11/f1<−0.80
1.85<f13/f1<2.40
なる条件式を満足することを特徴としている。
The zoom lens according to the present invention includes, in order from the object side to the image side, a first lens unit that has a positive refractive power and does not move during zooming, a second lens unit that has a negative refractive power that moves during zooming, and a negative refraction that moves during zooming. A zoom lens composed of a third lens group of force and a fourth lens group of positive refractive power that does not move during zooming,
The first lens group includes, in order from the object side to the image side, a first partial group having a negative refractive power that does not move during focusing, a second partial group that has a positive refractive power that moves during focusing, and a positive refractive power that does not move during focusing A third subgroup of
When the focal length of the first partial group is f11, the focal length of the third partial group is f13, and the focal length of the first lens group is f1,
−0.60 <f11 / f13 <−0.40
−1.20 <f11 / f1 <−0.80
1.85 <f13 / f1 <2.40
It satisfies the following conditional expression.
本発明によれば、高ズーム比及び広画角で、全物体距離範囲において高い光学性能を有するズームレンズが得られる。 According to the present invention, a zoom lens having a high zoom ratio and a wide angle of view and high optical performance in the entire object distance range can be obtained.
以下に、本発明の好ましい実施の形態を、添付の図面に基づいて詳細に説明する。まず、本発明のズームレンズのレンズ構成の特徴について説明する。 Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. First, features of the lens configuration of the zoom lens of the present invention will be described.
本発明のズームレンズは、物体側から像側へ順に、次の各レンズ群を有している。ズーミングに際して不動で正の屈折力の第1レンズ群、ズーミングに際して移動する負の屈折力の第2レンズ群、ズーミングに際して移動する負の屈折力の第3レンズ群、ズーミングに際して不動の正の屈折力の第4レンズ群より構成される。第1レンズ群は、物体側から像側へ順にフォーカシングに際して不動の負の屈折力の第1部分群、フォーカシングに際して移動する正の屈折力の第2部分群、フォーカシングに際して不動の正の屈折力の第3部分群より構成される。 The zoom lens of the present invention includes the following lens groups in order from the object side to the image side. A first lens unit having positive refractive power that does not move during zooming, a second lens unit having negative refractive power that moves during zooming, a third lens unit that has negative refractive power that moves during zooming, and a positive refractive power that does not move during zooming The fourth lens group. The first lens group includes, in order from the object side to the image side, a first partial group having a negative refractive power that does not move during focusing, a second partial group that has a positive refractive power that moves during focusing, and a positive refractive power that does not move during focusing. It is composed of a third partial group.
図1は、本発明の実施例1のズームレンズの広角端(焦点距離:f=3.70mm)で、無限遠物体に合焦しているときのレンズ断面図である。図2(A)、(B)、(C)は、実施例1の広角端(焦点距離:f=3.70mm)、中間のズーム位置(焦点距離:f=14.80mm)、望遠端(焦点距離:f=55.50mm)で無限遠物体に合焦したときの収差図である。実施例1はズーム比15.00、Fナンバー1.90〜2.80、広角端における撮像画角112.14度のズームレンズである。 FIG. 1 is a lens cross-sectional view when focusing on an object at infinity at the wide angle end (focal length: f = 3.70 mm) of the zoom lens according to the first embodiment of the present invention. 2A, 2B, and 2C show the wide-angle end (focal length: f = 3.70 mm), the intermediate zoom position (focal length: f = 14.80 mm), and the telephoto end of Example 1 (focal length: f = 13.70 mm). It is an aberration diagram when focusing on an object at infinity at a focal length: f = 55.50 mm. Example 1 is a zoom lens having a zoom ratio of 15.00, an F number of 1.90 to 2.80, and an imaging field angle of 112.14 degrees at the wide angle end.
但し、焦点距離は後述する実施例の数値データをmm単位で表したときの値である。これは以下の各実施例において全て同じである。 However, the focal length is a value when numerical data of an example described later is expressed in mm. This is the same in all the following embodiments.
図3は、本発明の実施例2のズームレンズの広角端(焦点距離:f=3.55mm)で、無限遠物体に合焦したときのレンズ断面図である。図4(A)、(B)、(C)は、実施例2の広角端(焦点距離:f=3.55mm)、中間のズーム位置(焦点距離:f=14.20mm)、望遠端(焦点距離:f=53.25mm)で無限遠物体に合焦したときの収差図である。実施例2はズーム比15.00、Fナンバー1.90〜2.80、広角端における撮像画角114.32度のズームレンズである。 FIG. 3 is a lens cross-sectional view when focusing on an object at infinity at the wide angle end (focal length: f = 3.55 mm) of the zoom lens according to the second embodiment of the present invention. 4A, 4B, and 4C show the wide-angle end (focal length: f = 3.55 mm), the intermediate zoom position (focal length: f = 14.20 mm), and the telephoto end of Example 2 (focal length: f = 13.50 mm). It is an aberration diagram when focusing on an object at infinity at a focal length: f = 53.25 mm. The second exemplary embodiment is a zoom lens having a zoom ratio of 15.00, an F number of 1.90 to 2.80, and an imaging field angle of 114.32 degrees at the wide angle end.
図5は、本発明の実施例3のズームレンズの広角端(焦点距離:f=3.70mm)、無限遠物体に合焦したときのレンズ断面図である。図6(A)、(B)、(C)は、実施例3の広角端(焦点距離:f=3.70mm)、中間のズーム位置(焦点距離:f=14.80mm)、望遠端(焦点距離:f=55.50mm)で無限遠物体に合焦したときの収差図である。実施例3はズーム比15.00、Fナンバー1.89〜2.80、広角端における撮像画角112.14度のズームレンズである。図7は本発明の撮像装置の要部概略図である。 FIG. 5 is a lens cross-sectional view when focusing on an object at infinity at the wide angle end (focal length: f = 3.70 mm) of the zoom lens according to Embodiment 3 of the present invention. 6A, 6B, and 6C show the wide-angle end (focal length: f = 3.70 mm), the intermediate zoom position (focal length: f = 14.80 mm), and the telephoto end (of Example 3). It is an aberration diagram when focusing on an object at infinity at a focal length: f = 55.50 mm. Example 3 is a zoom lens having a zoom ratio of 15.00, an F number of 1.89 to 2.80, and an imaging field angle of 112.14 degrees at the wide angle end. FIG. 7 is a schematic view of the main part of the imaging apparatus of the present invention.
各実施例のレンズ断面図において、左側が物体側で右側が像側である。実施例1乃至3のレンズ断面図において、L0はズームレンズである。 In the lens cross-sectional views of each example, the left side is the object side and the right side is the image side. In the lens cross-sectional views of Examples 1 to 3, L0 is a zoom lens.
U1はズーミングに際して不動の正の屈折力の第1レンズ群である。第1レンズ群U1は、物体側から像側へ順に、フォーカシングに際して不動の負の屈折力の第1部分群U11、フォーカシングに際して移動する正の屈折力の第2部分群U12、フォーカシングに際して不動の正の屈折力の第3部分群U13より構成されている。U2はズーミングに際して移動する負の屈折力の第2レンズ群であり、広角端から望遠端へのズーミングに際して像側へ移動する。 U1 is a first lens unit having a positive refractive power that does not move during zooming. The first lens unit U1 includes, in order from the object side to the image side, a first subgroup U11 having a negative refractive power that does not move during focusing, a second subgroup U12 that has a positive refractive power that moves during focusing, and a positive portion that does not move during focusing. It is comprised from the 3rd partial group U13 of this refractive power. U2 is a second lens unit having a negative refractive power that moves during zooming, and moves to the image side during zooming from the wide-angle end to the telephoto end.
U3はズーミングに際して移動する負の屈折力の第3レンズ群であり、広角端から望遠端への変倍に際して、移動する像面変動を補正するために物体側に凸状の軌跡を描いて移動する。U4はズーミングに際して不動の正の屈折力の第4レンズ群であり、結像作用を有する。 U3 is a third lens unit having a negative refractive power that moves during zooming, and moves in a convex locus on the object side in order to correct the moving image plane variation during zooming from the wide-angle end to the telephoto end. To do. U4 is a fourth lens unit having a positive refractive power that does not move during zooming, and has an imaging function.
SPは絞り(開口絞り)であり、第4レンズ群U4の物体側に配置されている。Pは色分解プリズムや光学フィルタ−等であり、同図ではガラスブロックとして示している。IPは撮像面であり、ズームレンズで形成された像を受光し、光電変換する固体撮像素子(光電変換素子)の撮像面に相当している。 SP is a stop (aperture stop), which is disposed on the object side of the fourth lens unit U4. P is a color separation prism, an optical filter, or the like, and is shown as a glass block in FIG. IP denotes an imaging surface, which corresponds to an imaging surface of a solid-state imaging device (photoelectric conversion device) that receives an image formed by a zoom lens and performs photoelectric conversion.
本発明のズームレンズにおいて、各収差図はe線(波長546.1nm)を基準波長としている。 In the zoom lens of the present invention, each aberration diagram uses the e-line (wavelength 546.1 nm) as a reference wavelength.
収差図において、球面収差における実線と二点鎖線と一点鎖線は各々e線,g線,C線である。非点収差における点線と実線は各々e線におけるメリディオナル像面,サジタル像面である。倍率色収差はg線(二点鎖線)とC線(一点鎖線)によって表している。ωは撮像半画角(度)、FnoはFナンバーである。球面収差は0.4mm、非点収差は0.4mm、歪曲は5%、倍率色収差は0.05mmのスケールで描かれている。尚、以下の各実施例において広角端と望遠端は変倍用レンズ群(第2レンズ群U2)が機構上、光軸上を移動可能な範の両端に位置したときのズーム位置をいう。 In the aberration diagrams, the solid line, the two-dot chain line, and the one-dot chain line in the spherical aberration are the e-line, g-line, and C-line, respectively. A dotted line and a solid line in astigmatism are a meridional image plane and a sagittal image plane in the e-line, respectively. The lateral chromatic aberration is represented by the g-line (two-dot chain line) and the C-line (one-dot chain line). ω is an imaging half angle of view (degree), and Fno is an F number. The spherical aberration is 0.4 mm, the astigmatism is 0.4 mm, the distortion is 5%, and the chromatic aberration of magnification is 0.05 mm. In each of the following embodiments, the wide-angle end and the telephoto end refer to zoom positions when the zoom lens unit (second lens unit U2) is located at both ends of the mechanism movable on the optical axis.
各実施例において、第1部分群U11の焦点距離をf11、第3部分群U13の焦点距離をf13、第1レンズ群U1の焦点距離をf1とする。このとき、
−0.60<f11/f13<−0.40 ・・・(1)
−1.20<f11/f1<−0.80 ・・・(2)
1.85<f13/f1<2.40 ・・・(3)
なる条件式を満足する。
In each embodiment, the focal length of the first partial group U11 is f11, the focal length of the third partial group U13 is f13, and the focal length of the first lens group U1 is f1. At this time,
−0.60 <f11 / f13 <−0.40 (1)
−1.20 <f11 / f1 <−0.80 (2)
1.85 <f13 / f1 <2.40 (3)
The following conditional expression is satisfied.
次に前述の各条件式の技術的意味について説明する。条件式(1)は、第1部分群U11と第3部分群U13の焦点距離の比を規定している。条件式(1)を満足することにより、第1レンズ群U1の後側主点位置を像面側に押し出し、第2レンズ群U2との主点間隔を広げることで広画角化を図っている。 Next, the technical meaning of each conditional expression described above will be described. Conditional expression (1) defines the ratio of the focal lengths of the first partial group U11 and the third partial group U13. By satisfying conditional expression (1), the rear principal point position of the first lens unit U1 is pushed to the image plane side, and the distance between the principal points from the second lens unit U2 is widened to widen the angle of view. Yes.
条件式(1)の下限値を超えて第1部分群U11の負の屈折力が弱まると、第1レンズ群U1の後側主点位置を像面側に十分押し出す事ができず、広画角化及び全系の小型化が困難になる。また条件式(1)の下限値を超えて第3部分群U13の正の屈折力が強まると望遠端において球面収差や軸上色収差等が増加し、これらの諸収差の補正が困難となる。条件式(1)の上限値を超えて第1部分群U11の負の屈折力が強まると広角端において倍率色収差の補正が困難となる。また条件式(1)の上限値を超えて第3部分群U13の正の屈折力が弱まると広画角化及び全系の小型化が困難になる。 When the lower limit of conditional expression (1) is exceeded and the negative refractive power of the first sub-unit U11 is weakened, the rear principal point position of the first lens unit U1 cannot be pushed sufficiently toward the image plane side, and a wide image is obtained. Keratinization and downsizing of the entire system become difficult. When the lower limit of conditional expression (1) is exceeded and the positive refractive power of the third subgroup U13 increases, spherical aberration, axial chromatic aberration, etc. increase at the telephoto end, making it difficult to correct these various aberrations. When the upper limit of conditional expression (1) is exceeded and the negative refractive power of the first subgroup U11 increases, it becomes difficult to correct lateral chromatic aberration at the wide-angle end. If the upper limit of conditional expression (1) is exceeded and the positive refractive power of the third subgroup U13 is weakened, it becomes difficult to widen the angle of view and downsize the entire system.
条件式(2)は、第1部分群U11の焦点距離と第1レンズ群U1の焦点距離の比を規定している。 Conditional expression (2) defines the ratio between the focal length of the first subgroup U11 and the focal length of the first lens unit U1.
条件式(2)の下限値を超えて第1部分群U11の負の屈折力が弱まると第1レンズ群U1の後側主点位置を像面側に十分押し出す事ができず、広画角化及び全系の小型化が困難になる。また条件式(2)の下限値を超えて第1レンズ群U1の正の屈折力が強くなると望遠端において球面収差や軸上色収差等が増大し、これらの諸収差の補正が困難となる。条件式(2)の上限値を超えて第1部分群U11の負の屈折力が強まると広角端において倍率色収差の補正が困難となる。また条件式(2)の上限値を超えて第1レンズ群U1の正の屈折力が弱くなると広画角化及び全系の小型化が困難になる。 If the negative refractive power of the first subgroup U11 is weakened beyond the lower limit value of the conditional expression (2), the rear principal point position of the first lens unit U1 cannot be sufficiently pushed out to the image plane side, and a wide angle of view. And miniaturization of the entire system becomes difficult. If the lower limit of conditional expression (2) is exceeded and the positive refractive power of the first lens unit U1 increases, spherical aberration, axial chromatic aberration, and the like increase at the telephoto end, making it difficult to correct these various aberrations. When the upper limit of conditional expression (2) is exceeded and the negative refractive power of the first subgroup U11 increases, it becomes difficult to correct lateral chromatic aberration at the wide-angle end. If the upper limit of conditional expression (2) is exceeded and the positive refractive power of the first lens unit U1 is weakened, it becomes difficult to widen the angle of view and downsize the entire system.
条件式(3)は、第3部分群U13の焦点距離と第1レンズ群U1の焦点距離の比を規定している。 Conditional expression (3) defines the ratio of the focal length of the third subgroup U13 and the focal length of the first lens unit U1.
条件式(3)の下限値を超えて第3部分群U13の正の屈折力が強くなると望遠端において球面収差や軸上色収差等が増大し、これらの諸収差の補正が困難となる。また条件式(3)の下限値を超えて第1レンズ群U1の正の屈折力が弱くなると広画角化及び全系の小型化が困難になる。条件式(3)の上限値を超えて第3部分群U3の正の屈折力が弱まると広画角化及び全系の小型化が困難になる。また条件式(3)の上限値を超えて第1レンズ群U1の正の屈折力が強くなると望遠端において球面収差や軸上色収差等が増大し、これらの諸収差の補正が困難となる。 If the lower limit of conditional expression (3) is exceeded and the positive refractive power of the third subgroup U13 increases, spherical aberration, axial chromatic aberration, and the like increase at the telephoto end, making it difficult to correct these various aberrations. If the lower limit of conditional expression (3) is exceeded and the positive refractive power of the first lens unit U1 becomes weak, it becomes difficult to widen the angle of view and to reduce the size of the entire system. If the upper limit of conditional expression (3) is exceeded and the positive refractive power of the third subgroup U3 is weakened, it becomes difficult to widen the angle of view and to reduce the size of the entire system. If the upper limit of conditional expression (3) is exceeded and the positive refractive power of the first lens unit U1 increases, spherical aberration, axial chromatic aberration, and the like increase at the telephoto end, making it difficult to correct these various aberrations.
更に好ましくは条件式(1)乃至(3)の数値範囲を次の如く設定するのが良い。これによれば、広画角化及び全系の小型化を図りつつ、高い光学性能を得るのが容易になる。
−0.55<f11/f13<−0.45 ・・・(1a)
−1.10<f11/f1<−0.90 ・・・(2a)
1.90<f13/f1<2.20 ・・・(3a)
以上のように本発明によれば、広画角、高ズーム比でしかも全ズーム範囲及び全物体距離範囲にわたり高い光学性能を有する小型、軽量なズームレンズが得られる。各実施例において好ましくは次の条件式のうち1つ以上を満足するのが良い。
More preferably, the numerical ranges of the conditional expressions (1) to (3) are set as follows. This makes it easy to obtain high optical performance while achieving a wide angle of view and downsizing of the entire system.
−0.55 <f11 / f13 <−0.45 (1a)
−1.10 <f11 / f1 <−0.90 (2a)
1.90 <f13 / f1 <2.20 (3a)
As described above, according to the present invention, a small and lightweight zoom lens having a wide angle of view, a high zoom ratio, and high optical performance over the entire zoom range and the entire object distance range can be obtained. In each embodiment, it is preferable to satisfy one or more of the following conditional expressions.
第1部分群U11は複数の負レンズと1枚以上の正レンズを有し、第1部分群U11に含まれる負レンズの材料のアッベ数の平均値と部分分散比の平均値をそれぞれνn11、θn11とする。第1部分群U11に含まれる正レンズの材料のアッベ数の平均値と部分分散比の平均値をそれぞれνp11、θp11とする。第3部分群U13は複数の負レンズと複数の正レンズを有し、第3部分群U13に含まれる負レンズの材料のアッベ数の平均値と部分分散比の平均値をそれぞれνn13、θn13とする。 The first partial group U11 includes a plurality of negative lenses and one or more positive lenses, and the average value of the Abbe number and the average value of the partial dispersion ratio of the negative lens material included in the first partial group U11 are represented by νn11, Let θn11. The average value of the Abbe number and the average value of the partial dispersion ratio of the material of the positive lens included in the first partial group U11 are set to νp11 and θp11, respectively. The third partial group U13 includes a plurality of negative lenses and a plurality of positive lenses. The average value of the Abbe number and the average value of the partial dispersion ratio of the negative lens materials included in the third partial group U13 are represented by νn13 and θn13, respectively. To do.
第3部分群U13に含まれる正レンズの材料のアッベ数の平均値と部分分散比をそれぞれνp13、θp13とする。このとき、次の条件式のうち1つ以上を満足するのが良い。
−1.90×10−3<(θp11−θn11)/(νp11−νn11)<−1.4×10−3
・・・(4)
−1.15×10−3<(θp13−θn13)/(νp13−νn13)<−0.80×10−3
・・・(5)
An average value and a partial dispersion ratio of Abbe numbers of the materials of the positive lenses included in the third partial group U13 are denoted by νp13 and θp13, respectively. At this time, one or more of the following conditional expressions should be satisfied.
−1.90 × 10 −3 <(θp11−θn11) / (νp11−νn11) <− 1.4 × 10 −3
... (4)
−1.15 × 10 −3 <(θp13−θn13) / (νp13−νn13) <− 0.80 × 10 −3
... (5)
次に前述の各条件式の技術的意味について説明する。条件式(4)、(5)は、第1部分群U11と第3部分群U13に含まれるレンズの材料の分散特性を規定している。条件式(4)は、広角端における倍率色収差の二次スペクトルを良好に補正するための条件を規定している。条件式(5)は、望遠端における軸上色収差の二次スペクトルを良好に補正するための条件を規定している。 Next, the technical meaning of each conditional expression described above will be described. Conditional expressions (4) and (5) define the dispersion characteristics of the lens materials included in the first partial group U11 and the third partial group U13. Conditional expression (4) defines a condition for satisfactorily correcting the secondary spectrum of lateral chromatic aberration at the wide-angle end. Conditional expression (5) defines a condition for satisfactorily correcting the secondary spectrum of axial chromatic aberration at the telephoto end.
図8は、負の屈折力のレンズ群において2色色消しと二次スペクトル残存に関する模式図である。図9は現存する光学材料のアッベ数νと部分分散比θの分布の模式図である。ここで材料のアッベ数νおよび部分分散比θは、g線における屈折率をNg、F線における屈折率をNF、d線における屈折率をNd、C線における屈折率をNCとするとき、
ν=(Nd−1)/(NF−NC)
θ=(Ng−NF)/(NF−NC)
である。
FIG. 8 is a schematic diagram regarding two-color achromatism and residual secondary spectrum in a lens unit having a negative refractive power. FIG. 9 is a schematic diagram of the distribution of the Abbe number ν and the partial dispersion ratio θ of existing optical materials. Here, the Abbe number ν and the partial dispersion ratio θ of the material are expressed as follows: Ng is the refractive index at the g-line, NF is the refractive index at the F-line, Nd is the refractive index at the d-line, and NC is the refractive index at the C-line.
v = (Nd-1) / (NF-NC)
θ = (Ng−NF) / (NF−NC)
It is.
図9に示すように、現存する光学材料はアッベ数νに対し部分分散比θが狭い範囲に分布しており、アッベ数νが小さいほど部分分散比θが大きい傾向を持っている。 As shown in FIG. 9, existing optical materials are distributed in a range where the partial dispersion ratio θ is narrow with respect to the Abbe number ν, and the partial dispersion ratio θ tends to increase as the Abbe number ν decreases.
所定の屈折力φであり、屈折力φ1、φ2、アッベ数ν1、ν2の2枚のレンズG1、レンズG2で構成される薄肉系の色収差の補正条件は、係数をEとすると、
φ1/ν1+φ2/ν2=E
であらわされる。ここで、
φ=φ1+φ2
である。E=0とするとC線−F線の結像位置が合致する。
The correction condition for the thin-walled chromatic aberration composed of the two lenses G1 and G2 having a predetermined refractive power φ, refractive power φ1, φ2, and Abbe number ν1, ν2,
φ1 / ν1 + φ2 / ν2 = E
It is expressed. here,
φ = φ1 + φ2
It is. When E = 0, the imaging positions of the C line and the F line coincide.
図8において、負の屈折力のレンズ群の色消しでは正レンズG1としてアッベ数ν1の小さな材料、負レンズG2としてアッベ数ν2の大きな材料を用いる。したがって図9より正レンズG1は部分分散比θ1が大きく、負レンズG2は部分分散比θ2が小さくなって、F線とC線で色収差を補正するとg線の結像点が像高の高い方にずれる。このずれ量を二次スペクトル量Δとして定義すると、
Δ=―(1/φ)×(θ1―θ2)/(ν1―ν2)
であらわされる。
In FIG. 8, in the achromatization of the lens unit having a negative refractive power, a material having a small Abbe number ν1 is used as the positive lens G1, and a material having a large Abbe number ν2 is used as the negative lens G2. Accordingly, from FIG. 9, the positive lens G1 has a larger partial dispersion ratio θ1, and the negative lens G2 has a smaller partial dispersion ratio θ2, and when the chromatic aberration is corrected by the F-line and C-line, the image point of the g-line has a higher image height. Sneak away. If this shift amount is defined as the secondary spectrum amount Δ,
Δ = − (1 / φ) × (θ1−θ2) / (ν1−ν2)
It is expressed.
ここで第1部分群U11、第2部分群U12、第3部分群U13、第2レンズ群U2、第3レンズ群U3、第4レンズ群U4の二次スペクトル量を各々Δ1a、Δ1b、Δ1c、Δ2、Δ3、Δ4とする。また第2部分群U12、第3部分群U13、第2レンズ群U2、第3レンズ群U3、第4レンズ群U4の結像倍率を各々β1b、β1c、β2、β3、β4とすると、レンズ全系における二次スペクトル量Δは以下の式で表される。 Here, the secondary spectral amounts of the first partial group U11, the second partial group U12, the third partial group U13, the second lens group U2, the third lens group U3, and the fourth lens group U4 are respectively expressed as Δ1a, Δ1b, Δ1c, Let Δ2, Δ3, and Δ4. If the imaging magnifications of the second partial group U12, the third partial group U13, the second lens group U2, the third lens group U3, and the fourth lens group U4 are β1b, β1c, β2, β3, and β4, respectively, The secondary spectral amount Δ in the system is expressed by the following equation.
Δ=(Δ1a×β1b×β1c×β2×β3×β4)+(Δ1b×β1c×β2×β3×β4)+(Δ1c×β2×β3×β4)+(Δ2×β3×β4)+(Δ3×β4)+Δ4 Δ = (Δ1a × β1b × β1c × β2 × β3 × β4) + (Δ1b × β1c × β2 × β3 × β4) + (Δ1c × β2 × β3 × β4) + (Δ2 × β3 × β4) + (Δ3 × β4) ) + Δ4
広角端における倍率色収差の二次スペクトル量は、軸外光線が最も高い位置を通る第1部分群U11で顕著に発生する。従って、第1部分群U11で発生する倍率色収差の二次スペクトル量Δ1aを抑制することで広角端における倍率色収差の二次スペクトル量を低減することが出来る。 The secondary spectral amount of lateral chromatic aberration at the wide-angle end is prominently generated in the first subgroup U11 passing through the position where the off-axis ray is highest. Therefore, by suppressing the secondary spectral amount Δ1a of the lateral chromatic aberration that occurs in the first subgroup U11, the secondary spectral amount of the lateral chromatic aberration at the wide angle end can be reduced.
軸上色収差においても同様に考える事ができ、特に望遠端における軸上色収差の二次スペクトル量は、Δは軸上光線が最も高い位置を通る第3部分群U13で顕著に発生する。従って、第3部分群U13で発生する軸上色収差の二次スペクトル量Δ1cを抑制することで望遠端における軸上色収差の二次スペクトル量を低減することができる。 The same can be considered for the axial chromatic aberration. In particular, the secondary spectral amount of the axial chromatic aberration at the telephoto end is prominently generated in the third sub-group U13 where the axial ray passes through the highest position. Therefore, the secondary spectral amount of axial chromatic aberration at the telephoto end can be reduced by suppressing the secondary spectral amount Δ1c of axial chromatic aberration generated in the third subgroup U13.
条件式(4)の下限を越えると、第1部分群U11による広角端における倍率色収差の二次スペクトル補正が不足してしまう。上限値を超えると逆に補正が過剰となる。条件式(5)の下限値を超えると、第3部分群U13による望遠端における軸上色収差の二次スペクトル補正が不足してしまう。上限値を超えると逆に補正が過剰となる。条件式(4)、(5)を同時に満たすことで広角端における倍率色収差と望遠端における軸上色収差を効果的に補正する事ができ、高い光学性能を得ることが容易になる。 If the lower limit of conditional expression (4) is exceeded, the secondary spectral correction of lateral chromatic aberration at the wide-angle end by the first subgroup U11 will be insufficient. If the upper limit is exceeded, the correction becomes excessive. If the lower limit value of conditional expression (5) is exceeded, the secondary spectral correction of longitudinal chromatic aberration at the telephoto end by the third subgroup U13 will be insufficient. If the upper limit is exceeded, the correction becomes excessive. By satisfying the conditional expressions (4) and (5) simultaneously, it is possible to effectively correct the lateral chromatic aberration at the wide-angle end and the axial chromatic aberration at the telephoto end, and it becomes easy to obtain high optical performance.
更に好ましくは、条件式(4)、(5)の数値範囲を以下のごとく設定するのが良い。
−1.85×10−3<(θp11−θn11)/(νp11−νn11)<−1.45×10−3
・・・(4a)
−1.10×10−3<(θp13−θn13)/(νp13−νn13)<−0.85×10−3
・・・(5a)
More preferably, the numerical ranges of conditional expressions (4) and (5) are set as follows.
−1.85 × 10 −3 <(θp11−θn11) / (νp11−νn11) <− 1.45 × 10 −3
... (4a)
−1.10 × 10 −3 <(θp13−θn13) / (νp13−νn13) <− 0.85 × 10 −3
... (5a)
尚、実施例において好ましくは、第2部分群U12は1枚の正レンズより構成するのが良い。これによれば第2部分群U12の小型軽量化を図りつつ、迅速なるフォーカシングが容易になる。 In the embodiment, it is preferable that the second partial group U12 is composed of one positive lens. This facilitates quick focusing while reducing the size and weight of the second subgroup U12.
本発明のズームレンズを固体撮像素子を有する撮像装置に用いたときには、次の条件式のうち1つ以上を満足するのが良い。 When the zoom lens of the present invention is used in an imaging apparatus having a solid-state imaging device, it is preferable that one or more of the following conditional expressions are satisfied.
広角端におけるズームレンズの全系の焦点距離をfw、ズームレンズのズーム比をZ、固体撮像素子のイメージサイズの対角長をISとする。このとき、次の条件式のうち1つ以上を満足するのが良い。
3.1<Z/fw<5.0 ・・・(6)
0.28<fw/IS<0.41 ・・・(7)
ここで、固体撮像素子のイメージサイズの対角長とは、ズームレンズにコンバータレンズ等を装着しないときのズームレンズ単体を対象としたときをいう。
The focal length of the entire zoom lens system at the wide angle end is fw, the zoom ratio of the zoom lens is Z, and the diagonal length of the image size of the solid-state imaging device is IS. At this time, one or more of the following conditional expressions should be satisfied.
3.1 <Z / fw <5.0 (6)
0.28 <fw / IS <0.41 (7)
Here, the diagonal length of the image size of the solid-state imaging device refers to a case where the zoom lens is a single object when a converter lens or the like is not attached to the zoom lens.
次に前述の各条件式の技術的意味について説明する。条件式(6)は、ズーム比と広角端における全系の焦点距離の比を規定している。条件式(7)は、イメージサイズに対する広角端における全系の焦点距離の比を規定している。条件式(6)、(7)を満たすことで、広画角で且つ高ズーム比のズームレンズを得ることが容易になる。更に好ましくは、条件式(6)、(7)の数値範囲を以下のごとく設定するのが良い。
3.9<Z/fw<4.3 ・・・(6a)
0.31<fw/IS<0.34 ・・・(7a)
Next, the technical meaning of each conditional expression described above will be described. Conditional expression (6) defines the ratio between the zoom ratio and the focal length of the entire system at the wide-angle end. Conditional expression (7) defines the ratio of the focal length of the entire system at the wide angle end to the image size. By satisfying conditional expressions (6) and (7), it becomes easy to obtain a zoom lens having a wide angle of view and a high zoom ratio. More preferably, the numerical ranges of conditional expressions (6) and (7) should be set as follows.
3.9 <Z / fw <4.3 (6a)
0.31 <fw / IS <0.34 (7a)
図7は各実施例のズームレンズを撮影光学系として用いた撮像装置(テレビカメラシステム)の概略図である。図7において101は実施例1乃至3のいずれかのズームレンズである。201はカメラである。ズームレンズ101はカメラ201に対して着脱可能となっている。301はカメラ201にズームレンズ101を装着することで構成される撮像装置である。ズームレンズ101は第1レンズ群F、第2レンズ群V、第2レンズ群以降のレンズ群CRを有している。第1レンズ群Fは合焦用の部分群が含まれている。第2レンズ群Vは変倍のために光軸上を移動する。 FIG. 7 is a schematic diagram of an image pickup apparatus (television camera system) using the zoom lens of each embodiment as a photographing optical system. In FIG. 7, reference numeral 101 denotes a zoom lens according to any one of Embodiments 1 to 3. Reference numeral 201 denotes a camera. The zoom lens 101 can be attached to and detached from the camera 201. Reference numeral 301 denotes an imaging apparatus configured by mounting the zoom lens 101 on the camera 201. The zoom lens 101 includes a first lens group F, a second lens group V, and a lens group CR subsequent to the second lens group. The first lens group F includes a focusing subgroup. The second lens group V moves on the optical axis for zooming.
第2レンズ群V以降のレンズ群CRには、変倍に伴う像面変動を補正するために光軸上を移動する第3レンズ群Cや、結像用の第4レンズ群等が含まれている。更に、レンズ群CRには、ズームレンズ全系の焦点距離を変位させる、光路中より挿抜可能なレンズユニット(エクステンダー)を含んでもよい。 The lens group CR after the second lens group V includes a third lens group C that moves on the optical axis in order to correct image plane fluctuations due to zooming, a fourth lens group for image formation, and the like. ing. Further, the lens group CR may include a lens unit (extender) that can be inserted into and removed from the optical path for displacing the focal length of the entire zoom lens system.
また、レンズ群CRには、光軸に対して垂直方向に変異させて防振を行う防振光学系を含んでも良い。SPは開口絞りである。102乃至104は各々第1レンズ群F、第2レンズ群V、変倍に伴う像面変動を補正する第3レンズ群を光軸方向に駆動するヘリコイドやカム等の駆動機構である。ここで、105乃至108は駆動機構102乃至104および開口絞りSPを電動駆動するモータ(駆動手段)である。 In addition, the lens group CR may include an image stabilization optical system that performs image stabilization by changing in a direction perpendicular to the optical axis. SP is an aperture stop. Reference numerals 102 to 104 denote driving mechanisms such as a helicoid and a cam that drive the first lens group F, the second lens group V, and the third lens group that corrects the image plane variation caused by zooming in the optical axis direction. Here, 105 to 108 are motors (drive means) for electrically driving the drive mechanisms 102 to 104 and the aperture stop SP.
109乃至112は、第1レンズ群Fや第2レンズ群V、変倍に伴う像面変動を補正する第3レンズ群Cの光軸上の位置や、開口絞りSPの絞り径を検出するためのエンコーダやポテンショメータ、あるいはフォトセンサ等の検出器である。カメラ201において、202は光学フィルタや色分解光学系に相当するガラスブロック、203はズームレンズ101によって形成された被写体像を受光するCCDセンサやCMOSセンサ等の固体撮像素子(光電変換素子)である。また、204、113はカメラ201及びズームレンズ101の各種の駆動を制御するCPUである。 Reference numerals 109 to 112 detect the position of the first lens group F, the second lens group V, the third lens group C that corrects the image plane variation accompanying zooming, and the aperture diameter of the aperture stop SP. Encoders, potentiometers, or detectors such as photosensors. In the camera 201, 202 is a glass block corresponding to an optical filter or a color separation optical system, and 203 is a solid-state imaging device (photoelectric conversion device) such as a CCD sensor or a CMOS sensor that receives a subject image formed by the zoom lens 101. . Reference numerals 204 and 113 denote CPUs that control various types of driving of the camera 201 and the zoom lens 101.
このように、本発明のズームレンズをテレビカメラに適用することにより、高い光学性能を有する撮像装置を実現している。ただし、本発明に関するズームレンズおよびカメラの構成は図7の形態に限定されず、その要旨の範囲内で種々の変形及び変更が可能である。この他、本発明のズームレンズはデジタルカメラやビデオカメラ等にも適用することができる。 In this way, an imaging apparatus having high optical performance is realized by applying the zoom lens of the present invention to a television camera. However, the configuration of the zoom lens and the camera according to the present invention is not limited to the form shown in FIG. 7, and various modifications and changes can be made within the scope of the gist. In addition, the zoom lens of the present invention can be applied to a digital camera, a video camera, and the like.
以下に本発明の各実施例の数値データを示す。数値データはいずれもd線を基準としたときの値である。各数値データにおいて、iは物体側からの面の順序を示す。riは物体側より第i番目の面の曲率半径、diは物体側より第i番目と第i+1番目の間隔、ndi、νdiは第i番目の光学部材のd線の屈折率とアッベ数である。BFは最終レンズ面から像面までの空気換算のバックフォーカスである。レンズ全長は第1レンズ面から最終レンズ面までの距離にバックフォーカスBFを加えた値である。 Numerical data of each example of the present invention is shown below. All of the numerical data are values based on the d line. In each numerical data, i indicates the order of the surfaces from the object side. ri is the radius of curvature of the i-th surface from the object side, di is the i-th and i + 1-th distance from the object side, and ndi and νdi are the refractive index and Abbe number of the d-line of the i-th optical member. . BF is an air-converted back focus from the final lens surface to the image plane. The total lens length is a value obtained by adding the back focus BF to the distance from the first lens surface to the final lens surface.
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する。Rを近軸曲率半径、kを円錐常数、A4、A6、A8、A10、A12、A3、A5、A7、A9、A11をそれぞれ非球面係数としたとき、次式で表している。また、「e−Z」は「×10−Z」を意味する。また前述の各条件式と数値データとの対応値を表1に示す。 In the aspherical shape, the X axis is in the optical axis direction, the H axis is perpendicular to the optical axis, and the light traveling direction is positive. When R is a paraxial radius of curvature, k is a conical constant, and A4, A6, A8, A10, A12, A3, A5, A7, A9, and A11 are each an aspheric coefficient, the following expression is used. “E-Z” means “× 10 −Z ”. Table 1 shows corresponding values between the above-described conditional expressions and numerical data.
<実施例1>
単位 mm
面データ
面番号 r d nd νd θgF 有効径
1* 379.748 2.40 1.75908 48.9 0.5578 95.92
2 30.842 23.27 60.19
3 288.426 1.78 1.59240 68.3 0.5456 59.71
4 52.269 11.46 55.68
5 -443.319 1.68 1.59240 68.3 0.5456 55.52
6 81.110 0.14 55.57
7 70.411 5.22 1.80518 25.4 0.6161 56.07
8 186.578 3.60 55.86
9 742.706 9.01 1.59240 68.3 0.5456 56.88
10* -56.285 1.58 57.47
11 1969.746 7.19 1.43387 95.1 0.5373 57.47
12 -78.385 1.59 1.65412 39.7 0.5737 57.45
13* -210.247 0.14 57.94
14 306.316 1.59 1.84666 23.8 0.6036 58.08
15 74.381 10.11 1.43387 95.1 0.5373 58.19
16 -331.087 0.14 59.00
17 201.493 14.17 1.49700 81.5 0.5374 60.22
18 -53.421 0.14 60.51
19 56.613 7.79 1.59240 68.3 0.5456 54.63
20 347.830 (可変) 53.54
21 43.032 0.75 2.00330 28.3 0.5980 19.98
22 13.337 3.51 17.08
23 -308.547 0.75 1.88300 40.8 0.5667 16.90
24 49.587 2.38 16.46
25 -43.935 5.30 1.92286 18.9 0.6495 16.24
26 -10.271 0.80 2.00330 28.3 0.5980 16.37
27 -160.218 0.14 17.09
28 42.010 2.83 1.59270 35.3 0.5933 17.35
29 -52.101 (可変) 17.31
30 -23.573 0.80 1.69680 55.5 0.5433 17.10
31 50.759 3.39 1.80809 22.8 0.6307 18.56
32 -369.066 (可変) 19.50
33(絞り) ∞ 1.40 27.25
34 -324.366 2.23 1.72342 38.0 0.5836 28.01
35 -75.522 0.15 28.51
36 106.929 4.08 1.64000 60.1 0.5370 29.65
37 -61.388 0.15 29.84
38 46.226 6.21 1.51633 64.1 0.5352 29.55
39 -43.521 1.00 1.88300 40.8 0.5667 29.22
40 527.003 34.00 28.95
41 44.830 5.01 1.56732 42.8 0.5730 25.93
42 -55.708 0.15 25.49
43 -620.742 1.00 1.88300 40.8 0.5667 24.34
44 17.802 5.54 1.51633 64.1 0.5352 22.48
45 -269.692 1.61 22.37
46 28.039 8.22 1.51633 64.1 0.5352 21.70
47 -20.916 1.00 1.88300 40.8 0.5667 20.38
48 55.536 1.29 20.04
49 36.349 5.44 1.48749 70.2 0.5300 20.39
50 -26.767 4.00 20.26
51 ∞ 33.00 1.60859 46.4 0.5664 40.00
52 ∞ 13.20 1.51680 64.2 0.5347 40.00
53 ∞ 2.59 40.00
像面 ∞
<Example 1>
Unit mm
Surface data Surface number rd nd νd θgF Effective diameter
1 * 379.748 2.40 1.75908 48.9 0.5578 95.92
2 30.842 23.27 60.19
3 288.426 1.78 1.59240 68.3 0.5456 59.71
4 52.269 11.46 55.68
5 -443.319 1.68 1.59240 68.3 0.5456 55.52
6 81.110 0.14 55.57
7 70.411 5.22 1.80518 25.4 0.6161 56.07
8 186.578 3.60 55.86
9 742.706 9.01 1.59240 68.3 0.5456 56.88
10 * -56.285 1.58 57.47
11 1969.746 7.19 1.43387 95.1 0.5373 57.47
12 -78.385 1.59 1.65412 39.7 0.5737 57.45
13 * -210.247 0.14 57.94
14 306.316 1.59 1.84666 23.8 0.6036 58.08
15 74.381 10.11 1.43387 95.1 0.5373 58.19
16 -331.087 0.14 59.00
17 201.493 14.17 1.49700 81.5 0.5374 60.22
18 -53.421 0.14 60.51
19 56.613 7.79 1.59240 68.3 0.5456 54.63
20 347.830 (variable) 53.54
21 43.032 0.75 2.00330 28.3 0.5980 19.98
22 13.337 3.51 17.08
23 -308.547 0.75 1.88300 40.8 0.5667 16.90
24 49.587 2.38 16.46
25 -43.935 5.30 1.92286 18.9 0.6495 16.24
26 -10.271 0.80 2.00330 28.3 0.5980 16.37
27 -160.218 0.14 17.09
28 42.010 2.83 1.59270 35.3 0.5933 17.35
29 -52.101 (variable) 17.31
30 -23.573 0.80 1.69680 55.5 0.5433 17.10
31 50.759 3.39 1.80809 22.8 0.6307 18.56
32 -369.066 (variable) 19.50
33 (Aperture) ∞ 1.40 27.25
34 -324.366 2.23 1.72342 38.0 0.5836 28.01
35 -75.522 0.15 28.51
36 106.929 4.08 1.64000 60.1 0.5370 29.65
37 -61.388 0.15 29.84
38 46.226 6.21 1.51633 64.1 0.5352 29.55
39 -43.521 1.00 1.88300 40.8 0.5667 29.22
40 527.003 34.00 28.95
41 44.830 5.01 1.56732 42.8 0.5730 25.93
42 -55.708 0.15 25.49
43 -620.742 1.00 1.88300 40.8 0.5667 24.34
44 17.802 5.54 1.51633 64.1 0.5352 22.48
45 -269.692 1.61 22.37
46 28.039 8.22 1.51633 64.1 0.5352 21.70
47 -20.916 1.00 1.88300 40.8 0.5667 20.38
48 55.536 1.29 20.04
49 36.349 5.44 1.48749 70.2 0.5300 20.39
50 -26.767 4.00 20.26
51 ∞ 33.00 1.60859 46.4 0.5664 40.00
52 ∞ 13.20 1.51680 64.2 0.5347 40.00
53 ∞ 2.59 40.00
Image plane ∞
非球面データ
第1面
K = 1.18499e-11 A 4= 2.05610e-6 A 6=-9.30516e-9 A 8= 3.10020e-13 A10= 7.94316e-18 A12=-1.28238e-20
A 3=-1.22420e-5 A 5= 1.43227e-7 A 7= 1.70295e-10 A 9=-3.31962e-14 A11= 4.13886e-18
第10面
K = 4.91323e-1 A 4= 9.90581e-7 A 6= 1.07998e-10 A 8=-1.41840e-12 A10= 3.48325e-15 A12=-2.66385e-18
A 3= 2.96511e-6 A 5= 8.00583e-8 A 7=-2.78056e-11 A 9=-7.91027e-14 A11= 7.74864e-17
第13面
K = 3.52645e+1 A 4= 7.47691e-7 A 6= 3.22917e-10 A 8= 2.75767e-12 A10=-2.11232e-15 A12= 2.27556e-18
A 3=-3.51624e-6 A 5=-5.69202e-8 A 7= 3.22146e-11 A 9=-2.17471e-14 A11=-4.42244e-17
Aspheric data 1st surface
K = 1.18499e-11 A 4 = 2.05610e-6 A 6 = -9.30516e-9 A 8 = 3.10020e-13 A10 = 7.94316e-18 A12 = -1.28238e-20
A 3 = -1.22420e-5 A 5 = 1.43227e-7 A 7 = 1.70295e-10 A 9 = -3.31962e-14 A11 = 4.13886e-18
10th page
K = 4.91323e-1 A 4 = 9.90581e-7 A 6 = 1.07998e-10 A 8 = -1.41840e-12 A10 = 3.48325e-15 A12 = -2.66385e-18
A 3 = 2.96511e-6 A 5 = 8.00583e-8 A 7 = -2.78056e-11 A 9 = -7.91027e-14 A11 = 7.74864e-17
Side 13
K = 3.52645e + 1 A 4 = 7.47691e-7 A 6 = 3.22917e-10 A 8 = 2.75767e-12 A10 = -2.11232e-15 A12 = 2.27556e-18
A 3 = -3.51624e-6 A 5 = -5.69202e-8 A 7 = 3.22146e-11 A 9 = -2.17471e-14 A11 = -4.42244e-17
各種データ
ズーム比 15.00
広角 中間 望遠
焦点距離 3.70 14.80 55.50
Fナンバー 1.90 1.90 2.80
半画角(度) 56.07 20.39 5.66
像高 5.50 5.50 5.50
レンズ全長 290.59 290.59 290.59
BF 35.80 35.80 35.80
d20 0.46 31.10 43.14
d29 41.04 7.76 7.35
d32 11.14 13.78 2.15
入射瞳位置 30.51 48.72 93.88
射出瞳位置 651.48 651.48 651.48
前側主点位置 34.23 63.86 154.13
後側主点位置 -1.11 -12.21 -52.91
ズームレンズ群データ
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 23.44 103.01 42.24 36.43
2 21 -16.27 16.46 -0.54 -14.24
3 30 -40.00 4.19 -0.25 -2.60
4 33 55.12 128.68 59.36 -121.04
単レンズデータ
レンズ 始面 焦点距離
1 1 -44.14
2 3 -107.69
3 5 -115.20
4 7 136.41
5 9 88.38
6 11 173.50
7 12 -190.84
8 14 -115.25
9 15 140.70
10 17 86.31
11 19 112.63
12 21 -19.35
13 23 -48.05
14 25 13.33
15 26 -10.88
16 28 39.42
17 30 -22.90
18 31 54.85
19 34 134.72
20 36 61.28
21 38 44.30
22 39 -45.23
23 41 44.35
24 43 -19.47
25 44 32.44
26 46 24.52
27 47 -17.00
28 49 32.43
29 51 0.00
30 52 0.00
Various data Zoom ratio 15.00
Wide angle Medium Telephoto focal length 3.70 14.80 55.50
F number 1.90 1.90 2.80
Half angle of view (degrees) 56.07 20.39 5.66
Image height 5.50 5.50 5.50
Total lens length 290.59 290.59 290.59
BF 35.80 35.80 35.80
d20 0.46 31.10 43.14
d29 41.04 7.76 7.35
d32 11.14 13.78 2.15
Entrance pupil position 30.51 48.72 93.88
Exit pupil position 651.48 651.48 651.48
Front principal point position 34.23 63.86 154.13
Rear principal point position -1.11 -12.21 -52.91
Zoom lens group data group Start surface Focal length Lens configuration length Front principal point position Rear principal point position
1 1 23.44 103.01 42.24 36.43
2 21 -16.27 16.46 -0.54 -14.24
3 30 -40.00 4.19 -0.25 -2.60
4 33 55.12 128.68 59.36 -121.04
Single lens Data lens Start surface Focal length
1 1 -44.14
2 3 -107.69
3 5 -115.20
4 7 136.41
5 9 88.38
6 11 173.50
7 12 -190.84
8 14 -115.25
9 15 140.70
10 17 86.31
11 19 112.63
12 21 -19.35
13 23 -48.05
14 25 13.33
15 26 -10.88
16 28 39.42
17 30 -22.90
18 31 54.85
19 34 134.72
20 36 61.28
21 38 44.30
22 39 -45.23
23 41 44.35
24 43 -19.47
25 44 32.44
26 46 24.52
27 47 -17.00
28 49 32.43
29 51 0.00
30 52 0.00
<実施例2>
単位 mm
面データ
面番号 r d nd νd θgF 有効径
1* 413.877 2.39 1.75908 48.9 0.5578 100.90
2 30.584 25.19 60.65
3 256.960 1.77 1.59240 68.3 0.5456 60.40
4 52.039 10.08 56.20
5 -641.825 1.67 1.61800 63.3 0.5441 56.09
6 76.458 0.14 55.93
7 68.545 5.51 1.84666 23.8 0.6036 56.52
8 193.516 3.62 56.76
9 797.213 8.76 1.59240 68.3 0.5456 57.97
10* -58.125 1.60 58.53
11 944.676 7.58 1.49700 81.5 0.5374 58.75
12 -78.897 1.58 1.72047 34.7 0.5834 58.75
13* -213.908 0.14 59.26
14 361.053 1.58 1.84666 23.8 0.6036 59.36
15 77.304 10.13 1.43387 95.1 0.5373 59.53
16 -232.317 0.14 60.19
17 208.626 13.95 1.49700 81.5 0.5374 61.57
18 -53.630 0.14 61.77
19 58.746 7.05 1.59240 68.3 0.5456 52.37
20 370.297 (可変) 51.33
21 59.955 0.74 2.00330 28.3 0.5980 20.15
22 13.512 3.39 17.14
23 -939.393 0.74 1.88300 40.8 0.5667 16.99
24 53.042 2.43 16.64
25 -41.218 4.61 1.92286 18.9 0.6495 16.46
26 -11.738 0.78 2.00330 28.3 0.5980 16.66
27 -238.127 0.13 17.35
28 49.464 3.03 1.80518 25.4 0.6161 17.64
29 -65.205 (可変) 17.61
30 -22.977 0.78 1.69680 55.5 0.5433 16.81
31 50.804 3.71 1.80809 22.8 0.6307 18.24
32 -334.128 (可変) 19.32
33(絞り) ∞ 1.40 27.14
34 -287.576 2.50 1.65412 39.7 0.5737 27.87
35 -61.624 0.15 28.40
36 116.604 4.52 1.52249 59.8 0.5439 29.56
37 -47.880 0.15 29.78
38 43.058 6.43 1.48749 70.2 0.5300 29.45
39 -42.211 1.00 1.88300 40.8 0.5667 29.10
40 2486.829 34.00 28.90
41 49.103 5.24 1.56732 42.8 0.5730 25.45
42 -53.439 0.16 24.92
43 -864.768 1.00 1.88300 40.8 0.5667 23.77
44 18.330 5.63 1.51633 64.1 0.5352 22.06
45 -185.612 2.12 21.89
46 26.101 7.94 1.48749 70.2 0.5300 20.89
47 -21.180 1.00 1.88300 40.8 0.5667 19.45
48 47.809 2.12 19.05
49 36.349 4.34 1.51633 64.1 0.5352 19.52
50 -27.145 4.00 19.44
51 ∞ 33.00 1.60859 46.4 0.5664 40.00
52 ∞ 13.20 1.51680 64.2 0.5347 40.00
53 ∞ 1.23 40.00
像面 ∞
<Example 2>
Unit mm
Surface data Surface number rd nd νd θgF Effective diameter
1 * 413.877 2.39 1.75908 48.9 0.5578 100.90
2 30.584 25.19 60.65
3 256.960 1.77 1.59240 68.3 0.5456 60.40
4 52.039 10.08 56.20
5 -641.825 1.67 1.61800 63.3 0.5441 56.09
6 76.458 0.14 55.93
7 68.545 5.51 1.84666 23.8 0.6036 56.52
8 193.516 3.62 56.76
9 797.213 8.76 1.59240 68.3 0.5456 57.97
10 * -58.125 1.60 58.53
11 944.676 7.58 1.49700 81.5 0.5374 58.75
12 -78.897 1.58 1.72047 34.7 0.5834 58.75
13 * -213.908 0.14 59.26
14 361.053 1.58 1.84666 23.8 0.6036 59.36
15 77.304 10.13 1.43387 95.1 0.5373 59.53
16 -232.317 0.14 60.19
17 208.626 13.95 1.49700 81.5 0.5374 61.57
18 -53.630 0.14 61.77
19 58.746 7.05 1.59240 68.3 0.5456 52.37
20 370.297 (variable) 51.33
21 59.955 0.74 2.00330 28.3 0.5980 20.15
22 13.512 3.39 17.14
23 -939.393 0.74 1.88300 40.8 0.5667 16.99
24 53.042 2.43 16.64
25 -41.218 4.61 1.92286 18.9 0.6495 16.46
26 -11.738 0.78 2.00330 28.3 0.5980 16.66
27 -238.127 0.13 17.35
28 49.464 3.03 1.80518 25.4 0.6161 17.64
29 -65.205 (variable) 17.61
30 -22.977 0.78 1.69680 55.5 0.5433 16.81
31 50.804 3.71 1.80809 22.8 0.6307 18.24
32 -334.128 (variable) 19.32
33 (Aperture) ∞ 1.40 27.14
34 -287.576 2.50 1.65412 39.7 0.5737 27.87
35 -61.624 0.15 28.40
36 116.604 4.52 1.52249 59.8 0.5439 29.56
37 -47.880 0.15 29.78
38 43.058 6.43 1.48749 70.2 0.5300 29.45
39 -42.211 1.00 1.88300 40.8 0.5667 29.10
40 2486.829 34.00 28.90
41 49.103 5.24 1.56732 42.8 0.5730 25.45
42 -53.439 0.16 24.92
43 -864.768 1.00 1.88300 40.8 0.5667 23.77
44 18.330 5.63 1.51633 64.1 0.5352 22.06
45 -185.612 2.12 21.89
46 26.101 7.94 1.48749 70.2 0.5300 20.89
47 -21.180 1.00 1.88300 40.8 0.5667 19.45
48 47.809 2.12 19.05
49 36.349 4.34 1.51633 64.1 0.5352 19.52
50 -27.145 4.00 19.44
51 ∞ 33.00 1.60859 46.4 0.5664 40.00
52 ∞ 13.20 1.51680 64.2 0.5347 40.00
53 ∞ 1.23 40.00
Image plane ∞
非球面データ
第2面
K = 1.18499e-11 A 4= 1.50812e-6 A 6=-1.08980e-8 A 8= 4.95655e-13 A10=-2.72284e-19 A12=-1.97923e-20
A 3=-1.11670e-5 A 5= 2.05038e-7 A 7= 1.76223e-10 A 9=-3.38863e-14 A11= 4.50271e-18
第11面
K = 3.11184e-1 A 4= 9.39394e-7 A 6= 2.76195e-10 A 8=-1.77645e-12 A10= 3.95236e-15 A12=-2.82986e-18
A 3= 1.72789e-6 A 5= 8.32941e-8 A 7=-2.79962e-11 A 9=-8.40270e-14 A11= 7.39250e-17
第14面
K = 3.62591e+1 A 4= 6.54042e-7 A 6= 1.89563e-10 A 8= 2.85299e-12 A10=-2.20743e-15 A12= 2.44808e-18
A 3=-2.42579e-6 A 5=-5.64464e-8 A 7= 3.35268e-11 A 9=-2.28036e-14 A11=-4.74979e-17
Aspheric data 2nd surface
K = 1.18499e-11 A 4 = 1.50812e-6 A 6 = -1.08980e-8 A 8 = 4.95655e-13 A10 = -2.72284e-19 A12 = -1.97923e-20
A 3 = -1.11670e-5 A 5 = 2.05038e-7 A 7 = 1.76223e-10 A 9 = -3.38863e-14 A11 = 4.50271e-18
11th page
K = 3.11184e-1 A 4 = 9.39394e-7 A 6 = 2.76195e-10 A 8 = -1.77645e-12 A10 = 3.95236e-15 A12 = -2.82986e-18
A 3 = 1.72789e-6 A 5 = 8.32941e-8 A 7 = -2.79962e-11 A 9 = -8.40270e-14 A11 = 7.39250e-17
14th page
K = 3.62591e + 1 A 4 = 6.54042e-7 A 6 = 1.89563e-10 A 8 = 2.85299e-12 A10 = -2.20743e-15 A12 = 2.44808e-18
A 3 = -2.42579e-6 A 5 = -5.64464e-8 A 7 = 3.35268e-11 A 9 = -2.28036e-14 A11 = -4.74979e-17
各種データ
ズーム比 15.00
広角 中間 望遠
焦点距離 3.55 14.20 53.25
Fナンバー 1.90 1.89 2.80
半画角(度) 57.16 21.17 5.90
像高 5.50 5.50 5.50
レンズ全長 290.48 290.48 290.48
BF 34.44 34.44 34.44
d21 0.46 31.15 43.32
d30 41.37 7.90 6.63
d33 11.14 13.93 3.03
入射瞳位置 30.38 48.24 93.27
射出瞳位置 440.12 440.12 440.12
前側主点位置 33.96 62.90 152.98
後側主点位置 -2.32 -12.97 -52.02
ズームレンズ群データ
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 23.30 103.02 42.16 36.32
2 22 -15.95 15.84 -0.79 -13.94
3 31 -39.20 4.49 -0.28 -2.80
4 34 57.71 129.91 64.23 -128.22
単レンズデータ
レンズ 始面 焦点距離
1 1 -43.42
2 4 -110.12
3 6 -110.04
4 8 121.66
5 10 91.48
6 12 146.44
7 13 -173.18
8 15 -115.33
9 16 134.69
10 18 87.13
11 20 116.47
12 22 -17.38
13 24 -56.51
14 26 16.33
15 27 -12.23
16 29 35.03
17 31 -22.51
18 32 54.25
19 35 118.67
20 37 65.32
21 39 44.68
22 40 -46.73
23 42 45.71
24 44 -20.20
25 45 32.50
26 47 25.30
27 48 -16.41
28 50 30.70
29 52 0.00
30 53 0.00
Various data Zoom ratio 15.00
Wide angle Medium telephoto focal length 3.55 14.20 53.25
F number 1.90 1.89 2.80
Half angle of view (degrees) 57.16 21.17 5.90
Image height 5.50 5.50 5.50
Total lens length 290.48 290.48 290.48
BF 34.44 34.44 34.44
d21 0.46 31.15 43.32
d30 41.37 7.90 6.63
d33 11.14 13.93 3.03
Entrance pupil position 30.38 48.24 93.27
Exit pupil position 440.12 440.12 440.12
Front principal point position 33.96 62.90 152.98
Rear principal point position -2.32 -12.97 -52.02
Zoom lens group data group Start surface Focal length Lens configuration length Front principal point position Rear principal point position
1 1 23.30 103.02 42.16 36.32
2 22 -15.95 15.84 -0.79 -13.94
3 31 -39.20 4.49 -0.28 -2.80
4 34 57.71 129.91 64.23 -128.22
Single lens Data lens Start surface Focal length
1 1 -43.42
2 4 -110.12
3 6 -110.04
4 8 121.66
5 10 91.48
6 12 146.44
7 13 -173.18
8 15 -115.33
9 16 134.69
10 18 87.13
11 20 116.47
12 22 -17.38
13 24 -56.51
14 26 16.33
15 27 -12.23
16 29 35.03
17 31 -22.51
18 32 54.25
19 35 118.67
20 37 65.32
21 39 44.68
22 40 -46.73
23 42 45.71
24 44 -20.20
25 45 32.50
26 47 25.30
27 48 -16.41
28 50 30.70
29 52 0.00
30 53 0.00
<実施例3>
単位 mm
面データ
面番号 r d nd νd θgF 有効径
1* 667.021 2.16 1.75908 48.9 0.5578 92.32
2 31.669 19.67 60.31
3 159.784 1.73 1.59240 68.3 0.5456 59.94
4 45.604 16.08 55.11
5 -72.073 1.63 1.59240 68.3 0.5456 54.98
6 233.904 0.13 57.12
7 90.804 5.45 1.80518 25.4 0.6161 58.95
8 430.675 1.20 58.91
9 310.779 7.28 1.59240 68.3 0.5456 59.68
10* -105.063 3.92 60.19
11 224.363 6.51 1.43387 95.1 0.5373 61.50
12* -98.332 0.13 61.51
13 146.500 1.63 1.84666 23.8 0.6036 61.53
14 54.379 13.14 1.43387 95.1 0.5373 60.64
15 -424.577 0.16 61.35
16 146.404 15.02 1.49700 81.5 0.5374 62.74
17 -59.407 0.16 63.13
18 87.597 7.09 1.59240 68.3 0.5456 57.35
19 -955.819 (可変) 56.40
20 24.929 0.75 2.00330 28.3 0.5980 22.55
21 11.633 4.70 18.65
22 128.440 0.75 2.00330 28.3 0.5980 18.45
23 45.289 2.57 17.99
24 -55.764 5.14 1.95906 17.5 0.6599 17.72
25 -12.238 0.80 2.00330 28.3 0.5980 17.76
26 480.637 0.14 18.04
27 28.193 3.14 1.59270 35.3 0.5933 18.29
28 976.886 (可変) 18.02
29 -25.247 0.80 1.69680 55.5 0.5433 17.10
30 40.009 2.82 1.80809 22.8 0.6307 18.53
31 3638.994 (可変) 19.16
32(絞り) ∞ 1.40 27.19
33 -2252.618 2.58 1.65412 39.7 0.5737 28.12
34 -70.339 0.15 28.59
35 133.710 3.79 1.52249 59.8 0.5439 29.56
36 -62.926 0.15 29.78
37 45.471 6.46 1.48749 70.2 0.5300 29.86
38 -41.809 1.00 1.88300 40.8 0.5667 29.60
39 -280.211 34.00 29.58
40 55.512 4.66 1.56732 42.8 0.5730 25.95
41 -54.580 0.15 25.56
42 -1383.940 1.00 1.88300 40.8 0.5667 24.42
43 18.317 6.25 1.51633 64.1 0.5352 22.67
44 -169.077 0.50 22.53
45 26.892 6.32 1.48749 70.2 0.5300 21.94
46 -23.308 1.00 1.88300 40.8 0.5667 21.38
47 50.609 1.34 21.00
48 36.349 4.81 1.51633 64.1 0.5352 21.42
49 -29.493 4.00 21.34
50 ∞ 33.00 1.60859 46.4 0.5664 40.00
51 ∞ 13.20 1.51680 64.2 0.5347 40.00
52 ∞ 4.53 40.00
像面 ∞
<Example 3>
Unit mm
Surface data Surface number rd nd νd θgF Effective diameter
1 * 667.021 2.16 1.75908 48.9 0.5578 92.32
2 31.669 19.67 60.31
3 159.784 1.73 1.59240 68.3 0.5456 59.94
4 45.604 16.08 55.11
5 -72.073 1.63 1.59240 68.3 0.5456 54.98
6 233.904 0.13 57.12
7 90.804 5.45 1.80518 25.4 0.6161 58.95
8 430.675 1.20 58.91
9 310.779 7.28 1.59240 68.3 0.5456 59.68
10 * -105.063 3.92 60.19
11 224.363 6.51 1.43387 95.1 0.5373 61.50
12 * -98.332 0.13 61.51
13 146.500 1.63 1.84666 23.8 0.6036 61.53
14 54.379 13.14 1.43387 95.1 0.5373 60.64
15 -424.577 0.16 61.35
16 146.404 15.02 1.49700 81.5 0.5374 62.74
17 -59.407 0.16 63.13
18 87.597 7.09 1.59240 68.3 0.5456 57.35
19 -955.819 (variable) 56.40
20 24.929 0.75 2.00330 28.3 0.5980 22.55
21 11.633 4.70 18.65
22 128.440 0.75 2.00330 28.3 0.5980 18.45
23 45.289 2.57 17.99
24 -55.764 5.14 1.95906 17.5 0.6599 17.72
25 -12.238 0.80 2.00330 28.3 0.5980 17.76
26 480.637 0.14 18.04
27 28.193 3.14 1.59270 35.3 0.5933 18.29
28 976.886 (variable) 18.02
29 -25.247 0.80 1.69680 55.5 0.5433 17.10
30 40.009 2.82 1.80809 22.8 0.6307 18.53
31 3638.994 (variable) 19.16
32 (Aperture) ∞ 1.40 27.19
33 -2252.618 2.58 1.65412 39.7 0.5737 28.12
34 -70.339 0.15 28.59
35 133.710 3.79 1.52249 59.8 0.5439 29.56
36 -62.926 0.15 29.78
37 45.471 6.46 1.48749 70.2 0.5300 29.86
38 -41.809 1.00 1.88300 40.8 0.5667 29.60
39 -280.211 34.00 29.58
40 55.512 4.66 1.56732 42.8 0.5730 25.95
41 -54.580 0.15 25.56
42 -1383.940 1.00 1.88300 40.8 0.5667 24.42
43 18.317 6.25 1.51633 64.1 0.5352 22.67
44 -169.077 0.50 22.53
45 26.892 6.32 1.48749 70.2 0.5300 21.94
46 -23.308 1.00 1.88300 40.8 0.5667 21.38
47 50.609 1.34 21.00
48 36.349 4.81 1.51633 64.1 0.5352 21.42
49 -29.493 4.00 21.34
50 ∞ 33.00 1.60859 46.4 0.5664 40.00
51 ∞ 13.20 1.51680 64.2 0.5347 40.00
52 ∞ 4.53 40.00
Image plane ∞
非球面データ
第1面
K = 5.31002e+0 A 4= 3.43325e-6 A 6=-6.43746e-10 A 8=-4.55056e-13 A10=-2.77489e-17 A12= 6.06582e-22
A 3=-1.21949e-5 A 5=-2.86595e-8 A 7= 1.83785e-11 A 9= 8.42937e-15 A11=-5.04392e-19
第10面
K =-3.12989e-1 A 4= 9.16952e-7 A 6=-7.56795e-10 A 8=-7.62130e-13 A10= 4.85820e-15 A12=-4.45775e-19
A 3=-3.41175e-6 A 5= 2.55341e-8 A 7=-2.23592e-11 A 9=-4.15168e-14 A11=-6.41258e-17
第12面
K =-1.63005e+0 A 4= 1.46195e-6 A 6=-2.46811e-10 A 8= 1.69464e-12 A10=-1.49788e-15 A12= 8.62514e-19
A 3= 1.32608e-6 A 5=-1.35647e-8 A 7= 5.63348e-11 A 9=-4.62022e-14 A11=-1.19001e-18
Aspheric data 1st surface
K = 5.31002e + 0 A 4 = 3.43325e-6 A 6 = -6.43746e-10 A 8 = -4.55056e-13 A10 = -2.77489e-17 A12 = 6.06582e-22
A 3 = -1.21949e-5 A 5 = -2.86595e-8 A 7 = 1.83785e-11 A 9 = 8.42937e-15 A11 = -5.04392e-19
10th page
K = -3.12989e-1 A 4 = 9.16952e-7 A 6 = -7.56795e-10 A 8 = -7.62130e-13 A10 = 4.85820e-15 A12 = -4.45775e-19
A 3 = -3.41175e-6 A 5 = 2.55341e-8 A 7 = -2.23592e-11 A 9 = -4.15168e-14 A11 = -6.41258e-17
12th page
K = -1.63005e + 0 A 4 = 1.46195e-6 A 6 = -2.46811e-10 A 8 = 1.69464e-12 A10 = -1.49788e-15 A12 = 8.62514e-19
A 3 = 1.32608e-6 A 5 = -1.35647e-8 A 7 = 5.63348e-11 A 9 = -4.62022e-14 A11 = -1.19001e-18
各種データ
ズーム比 15.00
広角 中間 望遠
焦点距離 3.70 14.80 55.50
Fナンバー 1.89 1.90 2.80
半画角(度) 56.07 20.39 5.66
像高 5.50 5.50 5.50
レンズ全長 292.76 292.76 292.76
BF 37.74 37.74 37.74
d19 0.46 31.10 43.14
d28 42.61 9.33 8.92
d31 11.70 14.34 2.70
入射瞳位置 29.94 48.15 93.32
射出瞳位置 1116.55 1116.55 1116.55
前側主点位置 33.65 63.14 151.59
後側主点位置 0.83 -10.27 -50.97
ズームレンズ群データ
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 23.44 103.08 41.67 38.16
2 20 -16.27 17.99 1.19 -12.46
3 29 -40.00 3.62 -0.04 -2.06
4 32 52.82 125.76 55.19 -113.94
単レンズデータ
レンズ 始面 焦点距離
1 1 -43.66
2 3 -107.96
3 5 -92.50
4 7 140.58
5 9 132.95
6 11 158.15
7 13 -101.97
8 14 111.76
9 16 86.89
10 18 135.33
11 20 -22.19
12 22 -69.46
13 24 15.25
14 25 -11.79
15 27 48.60
16 29 -22.01
17 30 49.53
18 33 110.29
19 35 82.11
20 37 45.64
21 38 -55.44
22 40 49.00
23 42 -20.35
24 43 32.26
25 45 26.63
26 46 -17.85
27 48 32.22
28 50 0.00
29 51 0.00
Various data Zoom ratio 15.00
Wide angle Medium Telephoto focal length 3.70 14.80 55.50
F number 1.89 1.90 2.80
Half angle of view (degrees) 56.07 20.39 5.66
Image height 5.50 5.50 5.50
Total lens length 292.76 292.76 292.76
BF 37.74 37.74 37.74
d19 0.46 31.10 43.14
d28 42.61 9.33 8.92
d31 11.70 14.34 2.70
Entrance pupil position 29.94 48.15 93.32
Exit pupil position 1116.55 1116.55 1116.55
Front principal point position 33.65 63.14 151.59
Rear principal point position 0.83 -10.27 -50.97
Zoom lens group data group Start surface Focal length Lens configuration length Front principal point position Rear principal point position
1 1 23.44 103.08 41.67 38.16
2 20 -16.27 17.99 1.19 -12.46
3 29 -40.00 3.62 -0.04 -2.06
4 32 52.82 125.76 55.19 -113.94
Single lens Data lens Start surface Focal length
1 1 -43.66
2 3 -107.96
3 5 -92.50
4 7 140.58
5 9 132.95
6 11 158.15
7 13 -101.97
8 14 111.76
9 16 86.89
10 18 135.33
11 20 -22.19
12 22 -69.46
13 24 15.25
14 25 -11.79
15 27 48.60
16 29 -22.01
17 30 49.53
18 33 110.29
19 35 82.11
20 37 45.64
21 38 -55.44
22 40 49.00
23 42 -20.35
24 43 32.26
25 45 26.63
26 46 -17.85
27 48 32.22
28 50 0.00
29 51 0.00
L0 ズームレンズ U1 第1レンズ群 U11 第1部分群
U12 第2部分群 U13 第3部分群 U2 第2レンズ群
U3 第3レンズ群 U4 第4レンズ群
L0 zoom lens U1 first lens group U11 first partial group U12 second partial group U13 third partial group U2 second lens group U3 third lens group U4 fourth lens group
Claims (5)
前記第1レンズ群は、物体側から像側へ順にフォーカシングに際して不動の負の屈折力の第1部分群、フォーカシングに際して移動する正の屈折力の第2部分群、フォーカシングに際して不動の正の屈折力の第3部分群より構成され、
前記第1部分群の焦点距離をf11、第3部分群の焦点距離をf13、前記第1レンズ群の焦点距離をf1とするとき、
−0.60<f11/f13<−0.40
−1.20<f11/f1<−0.80
1.85<f13/f1<2.40
なる条件式を満足することを特徴とするズームレンズ。 In order from the object side to the image side, a first lens group having a positive refractive power that does not move during zooming, a second lens group having a negative refractive power that moves during zooming, and a third lens group having a negative refractive power that moves during zooming, A zoom lens composed of a fourth lens unit having positive refractive power that does not move during zooming,
The first lens group includes, in order from the object side to the image side, a first partial group having a negative refractive power that does not move during focusing, a second partial group that has a positive refractive power that moves during focusing, and a positive refractive power that does not move during focusing A third subgroup of
When the focal length of the first partial group is f11, the focal length of the third partial group is f13, and the focal length of the first lens group is f1,
−0.60 <f11 / f13 <−0.40
−1.20 <f11 / f1 <−0.80
1.85 <f13 / f1 <2.40
A zoom lens satisfying the following conditional expression:
−1.90×10−3<(θp11−θn11)/(νp11−νn11)<−1.4×10−3
−1.15×10−3<(θp13−θn13)/(νp13−νn13)<−0.80×10−3
なる条件式を満足することを特徴とする請求項1に記載のズームレンズ。 The first partial group includes a plurality of negative lenses and one or more positive lenses, and the average value of the Abbe number and the partial dispersion ratio of the negative lens material included in the first partial group are νn11, θn11 is the average value of the Abbe number and the average value of the partial dispersion ratio of the positive lens material included in the first subgroup, respectively, νp11, θp11, and the third subgroup has a plurality of negative lenses and a plurality of positive lenses. And the average value of the Abbe number of the material of the negative lens included in the third subgroup and the average value of the partial dispersion ratio are respectively νn13 and θn13, and the average value of the Abbe number of the material of the positive lens included in the third subgroup. And the average value of the partial dispersion ratios as νp13 and θp13,
−1.90 × 10 −3 <(θp11−θn11) / (νp11−νn11) <− 1.4 × 10 −3
−1.15 × 10 −3 <(θp13−θn13) / (νp13−νn13) <− 0.80 × 10 −3
The zoom lens according to claim 1, wherein the following conditional expression is satisfied.
した像を受光する固体撮像素子を有することを特徴とする撮像装置。 An image pickup apparatus comprising: the zoom lens according to claim 1; and a solid-state image pickup device that receives an image formed by the zoom lens.
3.1<Z/fw<5.0
0.28<fw/IS<0.41
なる条件式を満足することを特徴とする請求項4に記載の撮像装置。 When the focal length of the entire zoom lens system at the wide angle end is fw, the zoom ratio of the zoom lens is Z, and the diagonal length of the image size of the solid-state image sensor is IS,
3.1 <Z / fw <5.0
0.28 <fw / IS <0.41
The imaging apparatus according to claim 4, wherein the following conditional expression is satisfied.
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JP2015144758A JP2017026797A (en) | 2015-07-22 | 2015-07-22 | Zoom lens and imaging apparatus having the same |
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JP2015144758A JP2017026797A (en) | 2015-07-22 | 2015-07-22 | Zoom lens and imaging apparatus having the same |
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JP2017026797A true JP2017026797A (en) | 2017-02-02 |
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Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2017058590A (en) * | 2015-09-18 | 2017-03-23 | 富士フイルム株式会社 | Zoom lens and imaging apparatus |
JPWO2017158899A1 (en) * | 2016-03-16 | 2018-09-27 | 富士フイルム株式会社 | Zoom lens and imaging device |
JP2020012911A (en) * | 2018-07-13 | 2020-01-23 | キヤノン株式会社 | Zoom lens and image capturing device |
US12013520B2 (en) | 2020-06-29 | 2024-06-18 | Canon Kabushiki Kaisha | Zoom lens and image pickup apparatus |
-
2015
- 2015-07-22 JP JP2015144758A patent/JP2017026797A/en active Pending
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2017058590A (en) * | 2015-09-18 | 2017-03-23 | 富士フイルム株式会社 | Zoom lens and imaging apparatus |
JPWO2017158899A1 (en) * | 2016-03-16 | 2018-09-27 | 富士フイルム株式会社 | Zoom lens and imaging device |
JP2020012911A (en) * | 2018-07-13 | 2020-01-23 | キヤノン株式会社 | Zoom lens and image capturing device |
JP7137384B2 (en) | 2018-07-13 | 2022-09-14 | キヤノン株式会社 | Zoom lens and imaging device |
US12013520B2 (en) | 2020-06-29 | 2024-06-18 | Canon Kabushiki Kaisha | Zoom lens and image pickup apparatus |
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