JPH0694996A - Wide angle zoom lens having stationary group having positive refracting power - Google Patents

Wide angle zoom lens having stationary group having positive refracting power

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Publication number
JPH0694996A
JPH0694996A JP1165391A JP1165391A JPH0694996A JP H0694996 A JPH0694996 A JP H0694996A JP 1165391 A JP1165391 A JP 1165391A JP 1165391 A JP1165391 A JP 1165391A JP H0694996 A JPH0694996 A JP H0694996A
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JP
Japan
Prior art keywords
lens group
lens
power
wide angle
refracting power
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Granted
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JP1165391A
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Japanese (ja)
Inventor
Hiroshi Miyamae
博 宮前
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Konica Corp
コニカ株式会社
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Priority to JP1165391A priority Critical patent/JPH0694996A/en
Publication of JPH0694996A publication Critical patent/JPH0694996A/en
Application status is Granted legal-status Critical

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Abstract

PURPOSE:To provide the wide angle zoom lens which has a wide variable power ratio of about 2, is bright and compact by holding an exit pupil position apart from an image pickup plane and concentrating a strong positive refracting power to the object side of a second lens group. CONSTITUTION:This wide angle zoom lens is constituted, successively from an object side, of three lens groups; a first lens group I having a negative refracting power, a second lens group II having a positive refracting power and a third lens group III having a positive refracting power. The second lens group II moves forward and backward on the optical axis, thereby varying the power. The first lens group I moves in association with the second lens group II and corrects the movement of the focus position according to the variable power. The third lens group III is held fixed during the power variation. Conditions 4<f3/fw<10 are satisfied. In the equation, f3 is the focal length of the third lens group III, fw denotes the focal length at the wide angle end of the entire system. An aperture diaphragm is fixed between the first lens group I and the second lens group II during the power variation and is thereby disposed. The diaphragm position exists at 1.0 just before the second lens group II at the telephoto end.

Description

【発明の詳細な説明】 DETAILED DESCRIPTION OF THE INVENTION

【0001】 [0001]

【産業上の利用分野】この発明は、小型の広角ズームレンズ、特にテレセントリック性を有するズームレンズに関する。 BACKGROUND OF THE INVENTION This invention provides a compact wide-angle zoom lens, relates to a zoom lens having a particularly telecentricity.

【0002】 [0002]

【従来の技術】近年CCDやMOS等の固体撮像素子を用いた電子スチルカメラやビデオカメラが普及してきているが、これらのカメラの光学系には射出瞳位置が像面から十分はなれることが要求される。 In recent years electronic still camera or a video camera using a solid-state imaging device such as a CCD or MOS is becoming popular, but the optical system of the camera be sufficient become the position of the exit pupil from the image plane is required. これは撮像素子上の色フィルターが撮像面からややはなれた位置にあるために、光束が斜めから入射した場合、実質的な開口効率が低下することや、撮像素子の周期構造に起因するモアレ現象を防止するための水晶フィルターの実効厚が、軸上と周辺であまり変動しないことが求められるためである。 This is because the color filter on the image pickup element is slightly away from the imaging surface, when the light beam is incident from obliquely, and that a substantial vignetting factor is lowered, Moire phenomenon caused by the periodic structure of the imaging device the effective thickness of the crystal filter to prevent it, is because it is required that does not vary much on and around the shaft. また最近の高感度型小型撮像素子では、撮像面の直前にマイクロレンズアレーを持つものがあり、この場合にも、射出瞳が十分離れていないと開口効率が周辺で低下する。 In the recent high-sensitivity type compact image pickup device, there are those with a microlens array immediately before the imaging surface, also in this case, the aperture efficiency is lowered around the exit pupil is not sufficiently separated.

【0003】従来から、物体側から順に負の屈折力を有する第1レンズ群、正の屈折力を有する第2レンズ群から構成され、これらの群の間隔を変化させることにより変倍を行なうズームレンズで、比較的広角で2倍程度の変倍比を持つものはいわゆる2群ズームとしてよく知られている。 Conventionally, a first lens group having negative refractive power in order from the object side, a second lens group having a positive refractive power, zooming performing zooming by varying the spacing of these groups in the lens, those having a relatively wide angle zoom ratio of about two times is well known as a so-called two-group zoom. これらの多くは、その開口絞りを第2レンズ群の前後もしくは内部に置き、変倍中第2レンズ群と一体で移動する。 Many of these places the aperture stop within or around the second lens group, moves integrally with the second lens group during zooming. この様なズームレンズをCCDやMOS Such a zoom lens CCD and MOS
等の固体撮像素子を用いたカメラに使用しようとすると射出瞳位置が撮像面に近くなりすぎて好ましくない。 Exit pupil position and trying to use the camera using a solid-state imaging device and the like is unfavorably too close to the imaging surface.

【0004】そこで第2レンズ群の後方に正の屈折力を有する固定群を置くことで射出瞳位置を遠ざけることが考えられる。 [0004] Therefore it is considered that distance the exit pupil position by placing a fixed group having a positive refractive power behind the second lens group. この様な正の固定の第3群を追加した構成のズームレンズとしては特開昭60−120311号公報、特開昭60−181717号公報、特開昭62−8 Such positive third JP 60-120311 discloses as added a zoom lens group of fixed, JP 60-181717, JP-Sho 62-8
7925号公報、特開平2−118509号公報などに記載されたズームレンズが知られている。 7925 JP, zoom lenses described in such Patent 2-118509 JP are known. しかし、これらはいづれも主として一眼レフスチールカメラ用に設計されたもので、レンズマウントの径の制約やコンパクト化との兼ね合いから、第3群の正の屈折力はきわめて弱く、射出瞳を十分遠ざけるには至らず、特に変倍に伴って絞り位置が第2レンズ群と共に像面に近づく広角側でこの傾向が著しくなり、上記目的には用いることができなかった。 However, it Izure also be designed primarily for single-lens reflex still cameras, from consideration of the constraints and compact size of the lens mount, the refractive power of the positive third group is very weak, away exit pupil sufficiently not enough to, in particular the diaphragm with the zoom position this tendency becomes remarkable in the wide-angle side to approach the image surface together with the second lens group, it can not be used in the above purposes.

【0005】 [0005]

【発明が解決しようとする課題】この発明はこの様な状況に鑑み、変倍比2倍程度の広角ズームレンズで、明るく、コンパクトで、射出瞳位置が撮像面から十分にはなれた、電子スチルカメラやビデオカメラ用に好適なズームレンズを提供しようとするものである。 [Problems that the Invention is to Solve In view this invention in such circumstances, at a zoom ratio 2 times the wide-angle zoom lens, bright, compact, the exit pupil position is distant enough from the imaging surface, an electronic still it is intended to provide a zoom lens suitable for a camera or a video camera.

【0006】 [0006]

【課題を解決するための手段】上記の課題を解決するため、この発明のズームレンズの基本的な構成は、物体側から順に、負の屈折力を有する第1レンズ群、正の屈折力を有する第2レンズ群、正の屈折力を有する第3レンズ群の3つのレンズ群から構成され、第2レンズ群が光軸上を前後に移動して変倍を行い、第1レンズ群は第2 Means for Solving the Problems] To solve the above problem, the basic configuration of the zoom lens of the present invention includes, in order from the object side, a first lens group having negative refractive power, positive refractive power a second lens group having, and a positive third lens three lens groups of a group having a refractive power performs zooming the second lens group is moved back and forth along the optical axis, a first lens group first 2
レンズ群に関連して移動して変倍にともなう焦点位置の移動を補正し、第3レンズ群は変倍中固定され、以下の条件を満足することを特徴とする。 Move in relation to the lens group to correct the movement of a focal position due to zooming, the third lens group is fixed during zooming, and satisfies the following condition. 4<f 3 /fw<10 (1) 但し、f 3は第3レンズ群の焦点距離、fwは全系の広角端の焦点距離を示す。 4 <f 3 / fw <10 (1) where, f 3 is the focal length of the third lens group, fw denotes a focal length at the wide angle end of the entire system.

【0007】また、開口絞りを第1レンズ群と第2レンズ群の間に変倍中固定して配設したことを特徴とする。 Further, characterized by being arranged and fixed during zooming between the aperture stop of the first and second lens groups.

【0008】この発明のズームレンズは、更に具体的には、第2レンズ群は物体側から順に少なくとも2枚の正レンズ、像側に強い凹面を向けた1枚の負レンズ、1枚の正レンズから構成され、上記物体側にある少なくとも2枚の正レンズ中、1枚は正レンズと負レンズからなる貼り合わせダブレットでも良く、以下の条件を満たす。 [0008] The zoom lens of the present invention, more specifically, at least two positive lenses second lens group in order from the object side, one negative lens having a strong concave surface facing the image side, one positive consists lens, in at least two positive lenses in the object side, one may be a cemented doublet consisting of a positive lens and a negative lens, the following condition is satisfied. 0.65<|m(2T)|<0.8 ( m(2T) <0) (2) 1.65<np (3) 但し、m(2T)は第2群の望遠端での結像倍率、np は第2レンズ群中、最も物体側にある2枚の正レンズの屈折率の平均値である。 0.65 <| m (2T) | <0.8 (m (2T) <0) (2) 1.65 <np (3) where, m (2T) is imaged at the telephoto end of the second group magnification, np is the second lens unit is an average value of the refractive index of the two positive lens disposed nearest to the object side. 正レンズが貼り合わせダブレットから構成されるばあい、np はこれを構成する正レンズの屈折率とする。 When composed of a positive lens is bonded doublet, np is the refractive index of the positive lens constituting this.

【0009】更に、第1レンズ群は物体側から順に、物体側に凸面を向けた負の屈折力のメニスカスレンズ、負レンズ、物体側に凸面を向けた正の屈折力のメニスカスレンズから構成される。 Furthermore, the first lens group includes, in order from the object side, is constituted of a negative meniscus lens refractive power, a negative lens, a convex surface directed toward the object side positive refractive power and a meniscus lens having a convex surface directed toward the object side that.

【0010】 [0010]

【作用】この発明のズームレンズにおいては、変倍中固定の第3群の正の屈折力を従来に比べて強い屈折力とした上、絞り位置を第1レンズ群と第2レンズ群の間に固定することにより射出瞳位置を撮像面から遠ざけており、特に広角端で著しい効果を有する。 [Action] In the zoom lens of the present invention, after having a strong refractive power than the positive refractive power of the third group in the zooming fixed conventionally between a stop position of the first lens group and the second lens group and away from the imaging plane of the exit pupil position by fixing the, in particular has a significant effect in the wide-angle end. また第2群の物体側に強い正の屈折力を集中させることによってバックフォーカスを短くし、全長のコンパクト化を計った。 The shorter back focus by concentrating a strong positive refractive power on the object side of the second group, as measured compactness of the overall length. また、従来に比べて明るい口径比を実現するため、軸上光束の最も高くなる第2レンズ群の正レンズに高屈折率硝材を用いている。 Further, in order to realize a bright aperture ratio as compared with the conventionally used high refractive index glass material becomes highest positive lens in the second lens group of the axial light bundle.

【0011】条件(1)は第3レンズ群の屈折力に関し、上限をこえると射出瞳位置を十分遠方にとることができなくなり、下限をこえると射出瞳の位置には有利であるが、全系の屈折力配置がアンバランスになり、広角端で負の歪曲収差の発生が著しくなる。 [0011] For condition (1) is the refractive power of the third lens group, and exceeds the upper limit will not be able to take adequate far the exit pupil position, is advantageous for the position of the exit pupil than the lower limit, the total refractive power arrangement of the system becomes unbalanced, the occurrence of negative distortion at the wide-angle end becomes remarkable.

【0012】条件(2)はバックフォーカスに関する。 [0012] The condition (2) relates to the back focus.
この条件の上限を越えると望遠端でバックフォーカスが長くなりすぎ、コンパクト性の点に不満が生じる。 Above the upper limit of this condition the back focus becomes too long at the telephoto end, frustration occurs in terms of compactness. 下限を越えると望遠端では全長が短くなるが、これに伴い、 While the overall length is shortened at the telephoto end exceeds the lower limit, due to this,
望遠端で所定の全系焦点距離を確保するため第1レンズ群の屈折力が弱くなり、第1レンズ群の移動量が増大してしまう。 Weakens the refractive power of the first lens group for ensuring a predetermined focal length at the telephoto end, the amount of movement of the first lens group is increased.

【0013】条件(3)は第2レンズ群中物体側にある2枚の正レンズの屈折率に関し、この条件を外れると、 [0013] For condition (3) is the refractive index of the two positive lenses that are in the object side second lens group, when out of this condition,
比較的Fナンバーの明るい広角端で球面収差が補正不足となる。 Spherical aberration is sufficiently corrected at a relatively F-number bright wide-angle end.

【0014】絞り位置を変倍中固定したことによって、 [0014] By fixed during zooming and aperture position,
絞り羽根の格納部を有しレンズ径に比べ大きな部材である絞り装置を変倍中移動することがなくなり、鏡枠構造上も大きな利点となる。 Stop prevents the throttle device moves during zooming is large member compared to the lens diameter has a storage portion of the blade, a great advantage on the barrel structure.

【0015】 [0015]

【実施例】以下この発明のズームレンズの実施例を示す。 EXAMPLES The following illustrates an embodiment of a zoom lens of the present invention. 絞り位置は何れの実施例でも、望遠端で、第2レンズ群の直前1.0のところにある。 In stop position either embodiment, at the telephoto end, it is at the immediately preceding 1.0 second lens group. また射出瞳位置の表示は、像面を基準とし、物体側へ計る時マイナスの符号をとる。 The display of the exit pupil position, with respect to the image plane, take the minus sign when measuring toward the object side. 尚、表中の各記号は、Rは各レンズ面の曲率半径、Dはレンズの中心厚またはレンズ間隔、Nは硝材の屈折率、νd はアッベ数、fはレンズ全系の焦点距離、 Incidentally, each symbol in the table, R represents the radius of curvature of each lens surface, D is the center thickness or distance between lens of the lens, N is the glass material refractive index of, [nu] d is Abbe number, f is the focal length of the entire lens system,
2ωは画角、FはFナンバー、fB はバックフォーカス、Yは最大像高、A、Bは第2レンズ群の移動量を示す。 2ω is the field angle, F is F number, fB designates the back focal, Y represents a maximum image height, A, B is the amount of movement of the second lens group.

【0016】実施例1 f=12.50〜24.25 F:2.70〜3.60 2ω=54.9〜30.0 Y=6.50 No. R D N νd 1 19.550 1.00 1.83400 37.2 2 10.913 4.50 3 第1レンズ群 120.915 1.00 1.79952 42.2 4 21.792 0.20 5 14.592 2.50 1.80518 25.4 6 33.681 A 7 26.029 2.00 1.77250 49.6 8 -48.290 0.20 9 第2レンズ群 8.511 3.00 1.77250 49.6 10 20.792 0.50 11 76.839 1.50 1.80518 25.4 12 6.623 2.50 13 1012.457 2.00 1.71300 53.9 14 -22.557 B 15 第3レンズ群 -33.220 2.00 1.71300 53.9 16 -20.008 3.88 17 カバーガラス ∞ 5.00 1.51633 64.1 18 ∞ 可変間隔及び射出瞳位置 f A B 射出瞳位置 12.50 23.98 2.30 −50 16.94 13.14 5.17 −43 24.25 4.00 9.99 −42 各レンズ群の焦点距離 f 1 =−32.895 f 2 = 18.310 f 3 [0016] Example 1 f = 12.50~24.25 F: 2.70~3.60 2ω = 54.9~30.0 Y = 6.50 No. R D N νd 1 19.550 1.00 1.83400 37.2 2 10.913 4.50 3 first lens group 120.915 1.00 1.79952 42.2 4 21.792 0.20 5 14.592 2.50 1.80518 25.4 6 33.681 A 7 26.029 2.00 1.77250 49.6 8 -48.290 0.20 9 second lens group 8.511 3.00 1.77250 49.6 10 20.792 0.50 11 76.839 1.50 1.80518 25.4 12 6.623 2.50 13 1012.457 2.00 1.71300 53.9 14 -22.557 B 15 third lens group -33.220 2.00 1.71300 53.9 16 -20.008 3.88 17 cover glass ∞ 5.00 1.51633 64.1 18 ∞ variable spacing and the exit pupil position f A B exit pupil position 12.50 23. 98 2.30 -50 16.94 13.14 5.17 -43 24.25 4.00 9.99 -42 focal length f 1 = -32.895 f 2 = 18.310 f 3 of the lens groups = 66.375 f 3 /fw=5.31 m(2T)=0.739 np =1.7725 = 66.375 f 3 /fw=5.31 m (2T ) = 0.739 np = 1.7725

【0017】実施例2 f=10.80〜20.15 F:2.80〜4.00 2ω=62.1〜35.2 Y=6.50 No. R D N νd 1 21.884 0.90 1.83400 37.2 2 12.019 3.50 3 第1レンズ群 52.330 0.90 1.83400 37.2 4 17.495 1.40 5 15.112 2.50 1.84666 23.8 6 30.960 A 7 71.753 2.00 1.71300 53.9 8 -81.294 0.20 9 第2レンズ群 17.028 2.00 1.71300 53.9 10 -334.973 0.20 11 8.126 2.00 1.71300 53.9 12 13.518 0.70 13 36.586 2.00 1.84666 23.8 14 6.376 1.48 15 -85.465 2.00 1.71300 53.9 16 -16.883 B 17 第3レンズ群 -30.139 2.00 1.71300 53.9 18 -17.702 3.97 19 カバーガラス ∞ 6.00 1.51633 64.1 20 ∞ 可変間隔及び射出瞳位置 f A B 射出瞳位置 10.80 23.21 1.00 −39 15.01 11.30 3.73 −36 20.51 3.00 7.00 −35 各レンズ群の焦点距離 f 1 =− [0017] Example 2 f = 10.80~20.15 F: 2.80~4.00 2ω = 62.1~35.2 Y = 6.50 No. R D N νd 1 21.884 0.90 1.83400 37.2 2 12.019 3.50 3 first lens group 52.330 0.90 1.83400 37.2 4 17.495 1.40 5 15.112 2.50 1.84666 23.8 6 30.960 A 7 71.753 2.00 1.71300 53.9 8 -81.294 0.20 9 second lens group 17.028 2.00 1.71300 53.9 10 -334.973 0.20 11 8.126 2.00 1.71300 53.9 12 13.518 0.70 13 36.586 2.00 1.84666 23.8 14 6.376 1.48 15 -85.465 2.00 1.71300 53.9 16 -16.883 B 17 third lens group -30.139 2.00 1.71300 53.9 18 -17.702 3.97 19 cover glass ∞ 6.00 1.51633 64.1 20 ∞ variable spacing and the exit pupil position f a B exit pupil position 10.80 23.21 1.00 -39 15.01 11.30 3.73 -36 20.51 3.00 7.00 -35 focal length f 1 of the lens groups = - 2.505 f 2 = 16.727 f 3 = 56.394 f 3 /fw=5.222 m(2T)=0.741 np =1.713 2.505 f 2 = 16.727 f 3 = 56.394 f 3 /fw=5.222 m (2T) = 0.741 np = 1.713

【0018】実施例3 f=10.80〜20.52 F:2.80〜4.00 2ω=62.1〜35.2 Y=6.50 No. R D N νd 1 20.142 0.90 1.83400 37.2 2 11.717 3.50 3 第1レンズ群 70.102 0.90 1.83400 37.2 4 15.569 1.40 5 15.165 2.50 1.84666 23.8 6 41.475 A 7 12.544 3.00 1.78590 44.2 8 -17.065 1.20 1.84666 23.8 9 第2レンズ群 -40.823 0.20 10 9.622 2.00 1.83400 37.2 11 19.449 0.60 12 -34.854 2.00 1.84666 23.8 13 6.862 1.20 14 -190.125 2.00 1.59270 35.3 15 -11.861 B 16 第3レンズ群 -33.313 2.00 1.64769 33.8 17 -22.304 3.07 18 カバーガラス ∞ 6.00 1.51633 64.1 19 ∞ 可変間隔及び射出瞳位置 f A B 射出瞳位置 10.80 23.19 1.00 −30 15.01 11.27 3.39 −29 20.52 3.00 6.31 −29 各レンズ群の焦点距離 f 1 =−31.489 [0018] Example 3 f = 10.80~20.52 F: 2.80~4.00 2ω = 62.1~35.2 Y = 6.50 No. R D N νd 1 20.142 0.90 1.83400 37.2 2 11.717 3.50 3 first lens group 70.102 0.90 1.83400 37.2 4 15.569 1.40 5 15.165 2.50 1.84666 23.8 6 41.475 A 7 12.544 3.00 1.78590 44.2 8 -17.065 1.20 1.84666 23.8 9 second lens group -40.823 0.20 10 9.622 2.00 1.83400 37.2 11 19.449 0.60 12 -34.854 2.00 1.84666 23.8 13 6.862 1.20 14 -190.125 2.00 1.59270 35.3 15 -11.861 B 16 third lens group -33.313 2.00 1.64769 33.8 17 -22.304 3.07 18 cover glass ∞ 6.00 1.51633 64.1 19 ∞ variable spacing and the exit pupil position f A B exit pupil position 10.80 23.19 1.00 -30 15.01 11.27 3.39 -29 20.52 3.00 6.31 -29 focal length f of the lens group 1 = -31.489 2 = 15.736 f 3 = 97.261 f 3 /fw=9.01 m(2T)=0.700 np =1.80995 2 = 15.736 f 3 = 97.261 f 3 /fw=9.01 m (2T) = 0.700 np = 1.80995

【0019】 [0019]

【発明の効果】上記の各実施例及び収差図で明らかな様に、この発明のズームレンズは、2倍程度の変倍比を有する比較的広角で明るく、コンパクトで、しかも射出瞳位置を十分遠方になる様に構成することが出来、その収差も良好に補正されたものが実現できた。 As is apparent in Examples and the aberration diagrams mentioned above, according to the present invention, the zoom lens of the present invention, relatively bright wide-angle has a zoom ratio of about two times, a compact, yet the exit pupil position sufficiently It can be configured so as to become distant, the aberration but also has been satisfactorily corrected can be realized.

【図面の簡単な説明】 BRIEF DESCRIPTION OF THE DRAWINGS

【図1】この発明のズームレンズの第1実施例のミドルポジションでの断面図 FIG. 1 is a cross-sectional view at the middle position of the first embodiment of the zoom lens of the present invention

【図2】この発明のズームレンズの第2実施例のミドルポジションでの断面図 2 is a cross-sectional view at the middle position of the second embodiment of the zoom lens of the present invention

【図3】この発明のズームレンズの第3実施例のミドルポジションでの断面図 3 is a cross-sectional view of in the middle position of the third embodiment of the zoom lens of the present invention

【図4】この発明のズームレンズの第1実施例の収差曲線図 [4] aberration curves of the first embodiment of the zoom lens of the present invention

【図5】この発明のズームレンズの第2実施例の収差曲線図 [5] the aberration curves view of a second embodiment of the zoom lens of the present invention

【図6】この発明のズームレンズの第3実施例の収差曲線図 [6] the aberration curves view of a third embodiment of a zoom lens of the present invention

───────────────────────────────────────────────────── ────────────────────────────────────────────────── ───

【手続補正書】 [Procedure amendment]

【提出日】平成5年10月5日 [Filing date] 1993 October 5

【手続補正2】 [Amendment 2]

【補正対象書類名】図面 [Correction target document name] drawings

【補正対象項目名】全図 [Correction target item name] all the drawings

【補正方法】変更 [Correction method] change

【補正内容】 [Correction contents]

【図1】 [Figure 1]

【図2】 [Figure 2]

【図3】 [Figure 3]

【図4】 [Figure 4]

【図5】 [Figure 5]

【図6】 [Figure 6]

Claims (2)

    【特許請求の範囲】 [The claims]
  1. 【請求項1】 物体側から順に、負の屈折力を有する第1レンズ群、正の屈折力を有する第2レンズ群、正の屈折力を有する第3レンズ群の3つのレンズ群から構成され、第2レンズ群が光軸上を前後に移動して変倍を行い、第1レンズ群は第2レンズ群に関連して移動し変倍にともなう焦点位置の移動を補正し、第3レンズ群は変倍中固定され、以下の条件を満足することを特徴とする広角ズームレンズ。 From 1. A object side, a first lens group having negative refractive power, a second lens group having a positive refractive power is composed of three lens groups of the third lens group having positive refractive power performs zooming the second lens group is moved back and forth along the optical axis, a first lens group to correct the movement of a focal position due to zooming to move in relation to the second lens group, the third lens group is fixed during zooming, wide-angle zoom lens satisfies the following condition. 4<f 3 /fw<10 但し、f 3は第3レンズ群の焦点距離、fwは全系の広角端の焦点距離を示す。 4 <f 3 / fw <10 where, f 3 is the focal length of the third lens group, fw denotes a focal length at the wide angle end of the entire system.
  2. 【請求項2】 開口絞りを第1レンズ群と第2レンズ群の間に変倍中固定して配設したことを特徴とする請求項1のズームレンズ Wherein the aperture stop first lens group and the zoom lens according to claim 1, characterized in that arranged and fixed during zooming between the second lens group
JP1165391A 1991-01-09 1991-01-09 Wide angle zoom lens having stationary group having positive refracting power Granted JPH0694996A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1165391A JPH0694996A (en) 1991-01-09 1991-01-09 Wide angle zoom lens having stationary group having positive refracting power

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1165391A JPH0694996A (en) 1991-01-09 1991-01-09 Wide angle zoom lens having stationary group having positive refracting power

Publications (1)

Publication Number Publication Date
JPH0694996A true JPH0694996A (en) 1994-04-08

Family

ID=11783925

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1165391A Granted JPH0694996A (en) 1991-01-09 1991-01-09 Wide angle zoom lens having stationary group having positive refracting power

Country Status (1)

Country Link
JP (1) JPH0694996A (en)

Cited By (27)

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US5969878A (en) * 1996-09-09 1999-10-19 Ricoh Company, Ltd. Zoom lens system
US6124984A (en) * 1996-12-13 2000-09-26 Nikon Corporation Variable magnification optical zoom lens system
JP2001033702A (en) * 1999-07-26 2001-02-09 Canon Inc Zoom lens
US6304389B1 (en) 1999-08-03 2001-10-16 Nikon Corporation Variable focal length lens system
US6308011B1 (en) 1998-03-31 2001-10-23 Canon Kabushiki Kaisha Zoom lens and photographic apparatus having the same
US6349002B1 (en) 1999-04-27 2002-02-19 Nikon Corporation Variable focal length lens system and imaging apparatus equipped with thereof
WO2002082158A1 (en) * 2001-04-02 2002-10-17 Matsushita Electric Industrial Co., Ltd. Zoom lens and electronic still camera using it
US6597513B2 (en) 2001-03-19 2003-07-22 Pentax Corporation Zoom lens system
US6710934B2 (en) 2001-09-18 2004-03-23 Samsung Techwin Co., Ltd. Compact zoom lens system
US6781768B2 (en) 2001-10-31 2004-08-24 Pentax Corporation Zoom len system
US6853498B2 (en) 2003-06-18 2005-02-08 Samsung Techwin Co., Ltd. Zoom lens
US6900947B2 (en) 2003-07-18 2005-05-31 Minolta Co., Ltd. Imaging lens device
US6903878B2 (en) 2001-08-03 2005-06-07 Canon Kabushiki Kaisha Zoom lens and image pickup apparatus
US6930839B2 (en) 2003-03-31 2005-08-16 Minolta Co., Ltd. Zoom lens device
US7042650B2 (en) 2003-03-31 2006-05-09 Minolta Co., Ltd. Zoom lens device
US7072121B2 (en) 2004-01-20 2006-07-04 Samsung Techwin Co., Ltd. Zoom lens
US7106522B2 (en) 2003-11-17 2006-09-12 Samsung Techwin Co., Ltd. Zoom lens
US7289275B2 (en) 2004-12-16 2007-10-30 Canon Kabushiki Kaisha Zoom lens system and image pickup apparatus having the system
US7304804B2 (en) 2003-03-31 2007-12-04 Minolta Co., Ltd. Zoom lens device
US7315425B2 (en) * 2004-04-06 2008-01-01 Canon Kabushiki Kaisha Zoom lens and image projection apparatus having the same
JP2008139755A (en) * 2006-12-05 2008-06-19 Canon Inc Imaging apparatus
JP2009205055A (en) * 2008-02-29 2009-09-10 Fujinon Corp Variable power optical system and imaging apparatus
US7969661B2 (en) 2009-02-12 2011-06-28 Olympus Imaging Corp. Wide angle zoom lens and image pickup device using the same
CN102707418A (en) * 2006-02-13 2012-10-03 卡西欧计算机株式会社 Zoom lens and camera with zoom lens
KR101457416B1 (en) * 2008-08-06 2014-11-03 삼성전자주식회사 Compact zoom lens
US9122041B2 (en) 2011-09-02 2015-09-01 Samsung Electronics Co., Ltd. Zoom lens and photographing apparatus including the same
US10156708B2 (en) 2016-10-20 2018-12-18 Seiko Epson Corporation Projection zoom lens and projection type image display device

Cited By (31)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5969878A (en) * 1996-09-09 1999-10-19 Ricoh Company, Ltd. Zoom lens system
US6124984A (en) * 1996-12-13 2000-09-26 Nikon Corporation Variable magnification optical zoom lens system
US6308011B1 (en) 1998-03-31 2001-10-23 Canon Kabushiki Kaisha Zoom lens and photographic apparatus having the same
US6349002B1 (en) 1999-04-27 2002-02-19 Nikon Corporation Variable focal length lens system and imaging apparatus equipped with thereof
JP2001033702A (en) * 1999-07-26 2001-02-09 Canon Inc Zoom lens
JP4532627B2 (en) * 1999-07-26 2010-08-25 キヤノン株式会社 Zoom lens
US6304389B1 (en) 1999-08-03 2001-10-16 Nikon Corporation Variable focal length lens system
US6597513B2 (en) 2001-03-19 2003-07-22 Pentax Corporation Zoom lens system
WO2002082158A1 (en) * 2001-04-02 2002-10-17 Matsushita Electric Industrial Co., Ltd. Zoom lens and electronic still camera using it
US6925253B2 (en) 2001-04-02 2005-08-02 Matsushita Electric Industrial Co., Ltd. Zoom lens and electronic still camera using it
US6903878B2 (en) 2001-08-03 2005-06-07 Canon Kabushiki Kaisha Zoom lens and image pickup apparatus
US6710934B2 (en) 2001-09-18 2004-03-23 Samsung Techwin Co., Ltd. Compact zoom lens system
DE10250828B4 (en) * 2001-10-31 2009-04-09 Hoya Corp. Zoom lens system
US6781768B2 (en) 2001-10-31 2004-08-24 Pentax Corporation Zoom len system
US6930839B2 (en) 2003-03-31 2005-08-16 Minolta Co., Ltd. Zoom lens device
US7304804B2 (en) 2003-03-31 2007-12-04 Minolta Co., Ltd. Zoom lens device
US7042650B2 (en) 2003-03-31 2006-05-09 Minolta Co., Ltd. Zoom lens device
US6853498B2 (en) 2003-06-18 2005-02-08 Samsung Techwin Co., Ltd. Zoom lens
US6900947B2 (en) 2003-07-18 2005-05-31 Minolta Co., Ltd. Imaging lens device
US7106522B2 (en) 2003-11-17 2006-09-12 Samsung Techwin Co., Ltd. Zoom lens
US7072121B2 (en) 2004-01-20 2006-07-04 Samsung Techwin Co., Ltd. Zoom lens
US7315425B2 (en) * 2004-04-06 2008-01-01 Canon Kabushiki Kaisha Zoom lens and image projection apparatus having the same
US7397610B2 (en) 2004-04-06 2008-07-08 Canon Kabushiki Kaisha Zoom lens and image projection apparatus having the same
US7289275B2 (en) 2004-12-16 2007-10-30 Canon Kabushiki Kaisha Zoom lens system and image pickup apparatus having the system
CN102707418A (en) * 2006-02-13 2012-10-03 卡西欧计算机株式会社 Zoom lens and camera with zoom lens
JP2008139755A (en) * 2006-12-05 2008-06-19 Canon Inc Imaging apparatus
JP2009205055A (en) * 2008-02-29 2009-09-10 Fujinon Corp Variable power optical system and imaging apparatus
KR101457416B1 (en) * 2008-08-06 2014-11-03 삼성전자주식회사 Compact zoom lens
US7969661B2 (en) 2009-02-12 2011-06-28 Olympus Imaging Corp. Wide angle zoom lens and image pickup device using the same
US9122041B2 (en) 2011-09-02 2015-09-01 Samsung Electronics Co., Ltd. Zoom lens and photographing apparatus including the same
US10156708B2 (en) 2016-10-20 2018-12-18 Seiko Epson Corporation Projection zoom lens and projection type image display device

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