JP3331226B2 - Zoom lens - Google Patents
Zoom lensInfo
- Publication number
- JP3331226B2 JP3331226B2 JP30623792A JP30623792A JP3331226B2 JP 3331226 B2 JP3331226 B2 JP 3331226B2 JP 30623792 A JP30623792 A JP 30623792A JP 30623792 A JP30623792 A JP 30623792A JP 3331226 B2 JP3331226 B2 JP 3331226B2
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- JP
- Japan
- Prior art keywords
- lens
- lens group
- refractive power
- unit
- group
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Description
【０００１】[0001]
【産業上の利用分野】本発明は、広角を含む高変倍率の
ズームレンズに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a zoom lens having a high zoom ratio including a wide angle.
【０００２】[0002]
【従来の技術】最近、高変倍率で小型なズームレンズの
考案がなされている。なかでも、超広角を含む高変倍率
のズームレンズの従来例として、米国特許明細書第４６
５９１８８号のレンズ系が知られているが全体のバラン
スの点では改良の余地がある。2. Description of the Related Art Recently, a zoom lens having a high magnification and a small size has been devised. Above all, as a conventional example of a zoom lens having a high zoom ratio including an ultra-wide angle, US Pat.
No. 59188 is known, but there is room for improvement in terms of overall balance.
【０００３】一方、一般のズーム領域を有するズームレ
ンズで、第２レンズ群に特徴を有するレンズ系として、
特開昭５７−１６９７１６号がある。又このレンズ系の
第４レンズ群を分割して、異なるズーミング移動を行な
うようにしたズームレンズとして特開昭６３−１８９８
１９号公報のレンズ系がある。しかしこれらレンズ系
は、正のレンズ群ではじまる３群ズームレンズを基本と
したものである。On the other hand, a zoom lens having a general zoom range and having a characteristic in the second lens group includes:
There is JP-A-57-169716. Japanese Patent Laid-Open No. 63-1898 discloses a zoom lens in which the fourth lens group of this lens system is divided to perform different zooming movements.
No. 19 discloses a lens system. However, these lens systems are based on a three-unit zoom lens that starts with a positive lens unit.
【０００４】これに対して５群ズームレンズで、全系を
第１レンズ群から第４レンズ群までと第５レンズ群とで
望遠タイプとして光学性能の維持と全長の小型化を図っ
たズームレンズとして本出願人の提案した特開平３−１
７７８０６号（米国特許明細書４７８９２２９）があ
る。On the other hand, a five-unit zoom lens, in which the entire system is a telephoto type including a first lens unit to a fourth lens unit and a fifth lens unit, is designed to maintain optical performance and reduce the overall length. Japanese Patent Laid-Open No. 3-1 proposed by the present applicant
No. 77806 (US Pat. No. 4,789,229).
【０００５】[0005]
【発明が解決しようとする課題】従来のズームレンズ
で、レンズ系の小型化のため構成レンズ枚数を削減する
ために非球面を多く使用しているものがある。しかし、
これらのズームレンズは、性能の維持や性能の向上はあ
まり重視されていない。Some conventional zoom lenses use a large number of aspherical surfaces to reduce the number of constituent lenses in order to reduce the size of the lens system. But,
In these zoom lenses, the maintenance of the performance and the improvement of the performance are not given much importance.
【０００６】本出願人の提案した前記のズームレンズは
ズームレンズを構成する各レンズ群のパワーが大になら
ないように５群ズームレンズとしたものである。The above-mentioned zoom lens proposed by the present applicant is a five-unit zoom lens so that the power of each lens group constituting the zoom lens does not increase.
【０００７】本発明は、この５群ズームレンズを発展さ
せてさらに高変倍率化、超広角化ししかも小型で高い光
学性能を維持したズームレンズを提供することを目的と
するものである。It is an object of the present invention to provide a zoom lens having a high zoom ratio, an ultra-wide angle, a small size and a high optical performance maintained by developing this five-unit zoom lens.
【０００８】[0008]
【課題を解決するための手段】本発明のズームレンズ
は、物体側より順に、正の屈折力の第１レンズ群と、負
の屈折力の第２レンズ群と、正の屈折力の第３レンズ群
と、正の屈折力の第４レンズ群と、負の屈折力の第５レ
ンズ群とよりなり、広角端から望遠端への変倍に際し
て、第１レンズ群と第２レンズ群、第４レンズ群と第５
レンズ群は、夫々レンズ群間隔が大きくなるように又第
２レンズ群と第３レンズ群、第３レンズ群と第４レンズ
群とは夫々レンズ群間隔が小になるように移動し、第５
レンズ群は固定であるレンズ系である。そして、第２レ
ンズ群を、物体側より順に、凸面を物体側に向けた第１
負レンズと、第２負レンズと、これに続くトリプレット
（いずれも空気レンズにより隔てられた正レンズ，負レ
ンズ，正レンズ）にて構成し、又次の条件（１），
（２），（３）を満足する。 （１） １．０＜−φ12W ／φ3 ＜８．０ （２） ０．１５＜φ3 ／φ4 ＜２．０ （３） ０．２＜Ｄ12W・φW ＜１．８ ただし、φW は広角端における全系の屈折力、φ12W は
広角端における第１レンズ群と第２レンズ群との合成の
屈折力、φ3 ，φ4 は夫々第３レンズ群および第４レン
ズ群の屈折力、Ｄ12W は広角端における第１レンズ群の
第１面の面頂から第２レンズ群の最終面の面頂までの光
軸上の距離である。A zoom lens according to the present invention comprises, in order from the object side, a first lens unit having a positive refractive power, a second lens unit having a negative refractive power, and a third lens unit having a positive refractive power. The zoom lens system includes a lens group, a fourth lens group having a positive refractive power, and a fifth lens group having a negative refractive power. When zooming from the wide-angle end to the telephoto end, the first lens group, the second lens group, and the Fourth lens group and fifth
The lens groups are moved so that the distance between the lens groups is increased, the distance between the second lens group and the third lens group, and the distance between the third lens group and the fourth lens group are reduced.
The lens group is a fixed lens system. Then, the second lens group is arranged in the first order with the convex surface facing the object side in order from the object side.
It consists of a negative lens, a second negative lens, and a triplet following it (all positive, negative, and positive lenses separated by an air lens).
Satisfies (2) and (3). (1) 1.0 <−φ 12 W / φ 3 <8.0 (2) 0.15 <φ 3 / φ 4 <2.0 (3) 0.2 <D 12W · φ W <1.8 , phi W is the refractive power of the entire system at the wide angle end, phi 12W is composite refractive power of the first lens group and the second lens group at the wide-angle end, phi 3, phi 4 are each the third lens group and the fourth lens The refractive power of the group, D 12W, is the distance on the optical axis from the top of the first surface of the first lens unit at the wide-angle end to the top of the last surface of the second lens unit.
【０００９】本発明のズームレンズは、以上のような構
成で、第１レンズ群から第４レンズ群までの光学系で主
レンズ系を構成し、これら主レンズ系で発生する補正不
足の軸外像面を第５レンズ群によって補正するようにし
ている。そのため主レンズ系で像面湾曲が残留していて
も第５レンズ群で補正出来る。このように主レンズ系の
像面湾曲の残留が許されるので、このレンズ系の小型化
が容易になり、全系の小型化が可能になる。In the zoom lens according to the present invention, the main lens system is constituted by the optical system from the first lens unit to the fourth lens unit in the above-mentioned configuration, and the insufficiently corrected off-axis generated in these main lens systems. The image plane is corrected by the fifth lens group. Therefore, even if the curvature of field remains in the main lens system, it can be corrected by the fifth lens group. Since the curvature of field of the main lens system is allowed to remain as described above, the size of the lens system can be easily reduced, and the size of the entire system can be reduced.
【００１０】本発明では、前記の小型化に加えて、前玉
径の縮小をも十分考慮してレンズ系全体を小型化し得る
屈折力配分としたもので、そのための条件が前記の各条
件である。In the present invention, in addition to the above-mentioned miniaturization, the reduction of the diameter of the front lens is sufficiently taken into consideration, and the refractive power distribution is set so that the whole lens system can be miniaturized. is there.
【００１１】条件（１）は、第２レンズ群の屈折力を基
本にして第１レンズ群から第３レンズ群までの各レンズ
群の屈折力を規定したものである。この条件（１）の上
限を越えると前玉径の縮小に寄与し、全長の短縮にとっ
ても有利であるが、広角端での像面湾曲と歪曲収差の補
正および望遠端での色収差の補正が困難になり好ましく
ない。又条件（１）の下限を越えると球面収差の補正や
全長の短縮化にとって好ましくない。The condition (1) defines the refractive power of each of the first to third lens groups based on the refractive power of the second lens group. Exceeding the upper limit of this condition (1) contributes to a reduction in the front lens diameter and is advantageous for a reduction in the overall length. It is difficult and not preferable. If the lower limit of the condition (1) is exceeded, it is not preferable for correcting spherical aberration and shortening the overall length.
【００１２】又主として望遠端における球面収差の補正
やズーム域全体での非点収差、像面湾曲の収差変動の抑
制およびそれらのバランスをとるためには、第３レンズ
群および第４レンズ群に関する屈折力配分が重要であ
る。これを規定したのが条件（２）である。In order to mainly correct spherical aberration at the telephoto end, to suppress astigmatism over the entire zoom range, and to suppress aberration fluctuations in field curvature, and to balance them, the third lens unit and the fourth lens unit are used. The power distribution is important. Condition (2) defines this.
【００１３】条件（２）の上限を越えると第３レンズ群
の屈折力が大となり、球面収差の補正が困難になり、必
要以上のレンズ枚数が必要になり、特に超広角域を含む
ズームレンズでは条件（１）を満足することによって前
玉の小型化を実現し得たとしても後玉が大型化する。又
条件（２）の下限を越えると第４レンズ群の屈折力が大
になり、この条件の上限を越えた時と同じように大型化
の問題が生ずる。又偏芯感度が高くなり、そのため軸ず
れ、傾き共敏感になり、中心性能の劣化、軸外性能の劣
化共に影響が大きく好ましくない。When the value exceeds the upper limit of the condition (2), the refractive power of the third lens unit becomes large, and it becomes difficult to correct spherical aberration. Therefore, more lenses are required than necessary. Then, even if the size of the front lens can be reduced by satisfying the condition (1), the size of the rear lens increases. If the lower limit of the condition (2) is exceeded, the refracting power of the fourth lens unit will be large, and the problem of size enlargement will occur as in the case where the upper limit of the condition is exceeded. In addition, the eccentricity sensitivity is increased, so that both the axis deviation and the inclination become sensitive, and the deterioration of the center performance and the deterioration of the off-axis performance are both unfavorably large.
【００１４】次に、条件（１）を満足せしめた上で、実
際にレンズ系の小型化を実現するための条件が、条件
（３）である。この条件の上限を越えると、前玉径、レ
ンズ系の全長が大になり好ましくない。又下限を越える
と小型化には有利であるが、レンズ系の大口径化、製造
上の加工性にとって好ましくない。Next, after satisfying the condition (1), the condition for realizing the downsizing of the lens system is the condition (3). If the upper limit of this condition is exceeded, the diameter of the front lens and the overall length of the lens system become undesirably large. If the lower limit is exceeded, it is advantageous for miniaturization, but it is not preferable for enlargement of the lens system and workability in manufacturing.
【００１５】次に本発明のレンズ系においては、第２レ
ンズ群を前述のような構成にした。即ち物体側より順
に、凸面を物体側に向けた第１負レンズと、第２負レン
ズと、これに続くトリプレット（いずれも空気レンズに
より隔てられた正レンズ，負レンズ，正レンズ）にて構
成した。本発明のズームレンズのようなタイプのレンズ
系では、第２レンズ群が強い負の屈折力を有することが
必要である。又第５レンズ群を除いては正の屈折力を有
している。そのために第２レンズ群は、収差補正上の役
割および負担が大きい。次に示す表は、後に述べる実施
例１のズームレンズの収差係数である。Next, in the lens system of the present invention, the second lens group has the above-described configuration. That is, in order from the object side, a first negative lens having a convex surface facing the object side, a second negative lens, and a triplet subsequent thereto (all positive lenses, negative lenses, and positive lenses separated by an air lens). did. In the type of lens system such as the zoom lens of the present invention, it is necessary that the second lens group has a strong negative refractive power. Except for the fifth lens group, it has a positive refractive power. Therefore, the second lens group has a large role and a large burden on aberration correction. The following table shows aberration coefficients of the zoom lens according to the first embodiment described later.
【００１６】 （表） ３次収差係数 Ｒ （Ａ） （Ｂ） （Ｃ） （Ｄ） （Ｅ） 1 -0.00209 -0.00489 -0.00127 -0.00687 -0.00755 2 0.05481 -0.04392 0.00391 -0.00274 0.00634 3 -0.02817 0.09967 -0.03918 0.05626 -0.00853 4 -0.11288 0.07904 -0.00615 0.00937 -0.03397 5 -0.02677 0.12719 -0.06713 0.08595 0.01285 6 0.09870 -0.19696 0.07862 -0.08959 -0.01532 7 0.15502 0.12567 0.01132 0.02047 0.06444 8 0.00827 -0.03319 0.01479 -0.05789 0.02851 9 0.85960 0.61014 0.04812 0.01935 0.03367 10 -0.77462 -0.58978 -0.04989 -0.02001 -0.02896 11 -0.22306 0.33872 -0.05715 0.05337 -0.04829 12 0.23185 -0.34740 0.05784 -0.05393 0.05014 13 0.96145 0.80708 0.07528 0.02887 0.02791 14 -1.23197 -0.93078 -0.07814 -0.02895 -0.03680 15 0.24700 0.35936 0.05809 0.03567 0.01545 16 0.00000 0.00000 0.00000 0.00000 0.00000 17 -0.51458 -0.56538 -0.06902 -0.03559 -0.02816 18 0.00046 0.00659 0.01045 0.03289 -0.00354 19 -0.11303 -0.18226 -0.03266 -0.03164 -0.02621 20 -0.12938 0.17433 -0.02610 0.01915 -0.01654 21 0.30429 -0.29450 0.03167 -0.02205 0.03667 22 0.01353 0.05799 0.02762 0.04496 0.00386 23 -0.02290 -0.07764 -0.02925 -0.04140 -0.00739 24 -0.08407 0.10398 -0.01429 0.01576 -0.02394 25 -0.00049 -0.00196 -0.00087 -0.03983 -0.02922 26 0.93811 1.24004 0.18213 0.10902 0.06529 27 -0.54813 -1.03481 -0.16384 -0.09363 -0.05263 28 -0.08428 0.10488 -0.01450 0.01051 -0.01084 29 0.00423 0.02741 0.01972 -0.03320 -0.03510 30 0.01104 0.04369 0.01922 0.11008 0.06421 31 0.00245 -0.00919 0.00383 -0.01252 0.00616 32 -0.02955 -0.16657 -0.10432 -0.27741 -0.04333 33 0.03233 0.18122 0.11288 0.30648 0.05114 34 -0.00241 0.00735 -0.00249 0.01577 -0.01305 ５次収差係数 Ｒ （Ａ） （Ｂ） （Ｃ） （Ｄ） （Ｅ） 1 -0.00001 -0.00002 0.00001 0.00004 0.00005 2 0.00195 -0.00210 -0.00001 0.00001 -0.00004 3 0.00060 -0.00100 -0.00093 0.00107 0.00000 4 -0.00596 0.00141 0.00020 -0.00013 -0.00052 5 -0.00346 0.01470 -0.00263 0.00317 -0.00056 6 0.04851 -0.07095 0.00282 -0.00319 0.00033 7 0.01105 0.03023 0.00006 0.00250 0.00245 8 -0.00164 0.00485 0.00034 -0.00131 -0.00006 9 0.16300 0.23851 0.00306 0.00292 0.00380 10 -0.15088 -0.23027 -0.00300 -0.00294 -0.00369 11 0.01397 0.03006 0.00015 -0.00112 0.00090 12 -0.01412 -0.03112 -0.00021 0.00118 -0.00092 13 0.21443 0.33634 0.00446 0.00429 0.00505 14 -0.27285 -0.39604 -0.00500 -0.00453 -0.00574 15 0.01488 0.04987 0.00230 0.00366 0.00274 16 0.00000 0.00000 0.00000 0.00000 0.00000 17 -0.04867 -0.10994 -0.00339 -0.00437 -0.00395 18 -0.00054 -0.00486 -0.00015 0.00125 0.00044 19 0.00322 0.00383 -0.00075 -0.00267 -0.00175 20 -0.04202 0.02461 0.00020 -0.00097 0.00075 21 0.08885 -0.03020 -0.00083 0.00150 -0.00122 22 -0.00197 -0.01205 -0.00016 0.00257 0.00118 23 0.00186 0.01240 -0.00005 -0.00270 -0.00128 24 -0.02299 0.00589 0.00014 -0.00071 0.00045 25 0.00012 0.00602 0.00104 -0.00108 -0.00050 26 0.18025 0.42125 0.01207 0.01433 0.00868 27 -0.15194 -0.34910 -0.01146 -0.01326 -0.00762 28 -0.00682 -0.00216 0.00028 -0.00074 0.00051 29 0.00003 0.00059 0.00094 0.00011 0.00011 30 0.00046 0.00231 0.00101 0.00844 0.00149 31 0.00005 -0.00021 -0.00004 -0.00085 0.00037 32 -0.00127 -0.01146 -0.01375 -0.04784 -0.00453 33 0.00128 0.01149 0.01359 0.04998 0.00519 34 -0.00002 0.00023 0.00016 0.00151 -0.00082 上記の表で、（Ａ），（Ｂ），（Ｃ），（Ｄ），（Ｅ）
は夫々球面収差係数，コマ収差係数，非点収差係数，歪
曲収差係数，ペッツバール和である。上記の表において
特に第２レンズ群（第６面〜第１５面）に注目すると、
第９面から第１４面までは収差発生量が大であり、第９
−１０面、第１１−１２面、第１３−１４面は空気レン
ズであり、これら空気レンズが各々符号が反対の収差が
発生し、これら空気レンズが収差補正に寄与しているこ
とが明らかである。又第１空気レンズと第３空気レンズ
が収差の発生が大で、次いで第２空気レンズが大であ
る。特に球面収差とコマ収差の補正作用が大であり、こ
れらによりレンズ系全体の性能を良好にすることが出来
る。(Table) Third-order aberration coefficient R (A) (B) (C) (D) (E) 1 -0.00209 -0.00489 -0.00127 -0.00687 -0.00755 2 0.05481 -0.04392 0.00391 -0.00274 0.00634 3 -0.02817 0.09967- 0.03918 0.05626 -0.00853 4 -0.11288 0.07904 -0.00615 0.00937 -0.03397 5 -0.02677 0.12719 -0.06713 0.08595 0.01285 6 0.09870 -0.19696 0.07862 -0.08959 -0.01532 7 0.15502 0.12567 0.01132 0.02047 0.06444 8 0.00827 -0.03319 0.01479 -0.05789 0.02851 9 0.88960 0.628510 10 -0.77462 -0.58978 -0.04989 -0.02001 -0.02896 11 -0.22306 0.33872 -0.05715 0.05337 -0.04829 12 0.23185 -0.34740 0.05784 -0.05393 0.05014 13 0.96145 0.80708 0.07528 0.02887 0.02791 14 -1.23197 -0.93078 -0.07814 -0.02895 -0.03680 15 0.2470056750.05 0.01545 16 0.00000 0.00000 0.00000 0.00000 0.00000 17 -0.51458 -0.56538 -0.06902 -0.03559 -0.02816 18 0.00046 0.00659 0.01045 0.03289 -0.00354 19 -0.11303 -0.18226 -0.03266 -0.03164 -0.02621 20 -0.12938 0.17433 -0.02610 0.01915 -0.0165 4 21 0.30429 -0.29450 0.03167 -0.02205 0.03667 22 0.01353 0.05799 0.02762 0.04496 0.00386 23 -0.02290 -0.07764 -0.02925 -0.04140 -0.00739 24 -0.08407 0.10398 -0.01429 0.01576 -0.02394 25 -0.00049 -0.00196 -0.00087 -0.03983 -0.02922 26 0.93811 1.24004 0.1821 0.10902 0.06529 27 -0.54813 -1.03481 -0.16384 -0.09363 -0.05263 28 -0.08428 0.10488 -0.01450 0.01051 -0.01084 29 0.00423 0.02741 0.01972 -0.03320 -0.03510 30 0.01104 0.04369 0.01922 0.11008 0.06421 31 0.00245 -0.00919 0.00383 -0.01252 0.00616 32 -0.02955 -0.1657 0.10432 -0.27741 -0.04333 33 0.03233 0.18122 0.11288 0.30648 0.05114 34 -0.00241 0.00735 -0.00249 0.01577 -0.01305 Fifth order aberration coefficient R (A) (B) (C) (D) (E) 1 -0.00001 -0.00002 0.00001 0.00004 0.00005 2 0.00195 -0.00210 -0.00001 0.00001 -0.00004 3 0.00060 -0.00100 -0.00093 0.00107 0.00000 4 -0.00596 0.00141 0.00020 -0.00013 -0.00052 5 -0.00346 0.01470 -0.00263 0.00317 -0.00056 6 0.04851 -0.07095 0.00282 -0.00319 0.00033 7 0.01105 0.03023 0.0 0006 0.00250 0.00245 8 -0.00164 0.00485 0.00034 -0.00131 -0.00006 9 0.16300 0.23851 0.00306 0.00292 0.00380 10 -0.15088 -0.23027 -0.00300 -0.00294 -0.00369 11 0.01397 0.03006 0.00015 -0.00112 0.00090 12 -0.01412 -0.03112 -0.00021 0.00118 -0.00092 13 0.21443 0.33634 0.00446 0.00429 0.00505 14 -0.27285 -0.39604 -0.00500 -0.00453 -0.00574 15 0.01488 0.04987 0.00230 0.00366 0.00274 16 0.00000 0.00000 0.00000 0.00000 0.00000 17 -0.04867 -0.10994 -0.00339 -0.00437 -0.00395 18 -0.00054 -0.00486 -0.00015 0.00125 0.00044 19 0.00322 0.00383 -0.00075 -0.00267 -0.00175 20 -0.04202 0.02461 0.00020 -0.00097 0.00075 21 0.08885 -0.03020 -0.00083 0.00150 -0.00122 22 -0.00197 -0.01205 -0.00016 0.00257 0.00118 23 0.00186 0.01240 -0.00005 -0.00270 -0.00128 24 -0.02299 0.00589 0.00014 -0.00071 0.00045 25 0.00012 0.00602 0.00104 -0.00108 -0.00050 26 0.18025 0.42125 0.01207 0.01433 0.00868 27 -0.15194 -0.34910 -0.01146 -0.01326 -0.00762 28 -0.00682 -0.00216 0.00028 -0.00074 0.00051 29 0.00003 0.00059 0.00094 0.00011 0.00011 30 0.00046 0.00231 0.00101 0.00844 0.00149 31 0.00005 -0.00021 -0.00004 -0.00085 0.00037 32 -0.00127 -0.01146 -0.01375 -0.04784 -0.00453 33 0.00128 0.01149 0.01359 0.04998 0.00519 34 -0.00002 0.00023 0.00016 0.00151 -0.00082 In the above table, (A) , (B), (C), (D), (E)
Denotes a spherical aberration coefficient, a coma aberration coefficient, an astigmatism coefficient, a distortion aberration coefficient, and a Petzval sum, respectively. Paying particular attention to the second lens group (Sixth to fifteenth surfaces) in the above table,
The aberration generation amount is large from the ninth surface to the fourteenth surface.
Surfaces -10, 11-12, and 13-14 are air lenses, and these air lenses generate aberrations having opposite signs, and it is clear that these air lenses contribute to aberration correction. is there. In addition, the first air lens and the third air lens generate a large amount of aberration, and then the second air lens generates a large amount of aberration. In particular, the effect of correcting spherical aberration and coma is great, and these can improve the performance of the entire lens system.
【００１７】[0017]
【実施例】次ぎに本発明のズームレンズの各実施例を示
す。 実施例１ ｆ＝３６．１８０〜８１．７４５〜１９３．５０３，Ｆ／４．６００〜５．５６ ０〜６．２５０ ２ω＝６１．６８°〜２９．６０°〜１２．７４° 非球面係数 （第６面）Ｅ＝−０．１５１２０×１０−５，Ｆ＝−０．８４５９０×１０−８ Ｇ＝０．８８１５５×１０−１０，Ｈ＝−０．２６１ ９７×１０−１２ （第２７面）Ｅ＝−０．１１２０８×１０−４，Ｆ＝−０．１６７１８×１０− ７ Ｇ＝−０．４７５２２×１０−１０，Ｈ＝−０．１６ ６１４×１０−１２ −φ１２Ｗ／φ３＝２．４２６，φ３／φ４＝０．７４５，Ｄ１２Ｗ・φＷ＝０ ．６８０９DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the zoom lens according to the present invention will be described below.
You. Example 1 f = 36.180 to 81.745 to 193.503F / 4.600-5.56 0 to 6.250 2ω = 61.68 ° to 29.60 ° to 12.74 ° Aspherical surface coefficient (Sixth surface) E = -0.15120 × 10-5, F = −0.84590 × 10-8 G = 0.88155 × 10-10, H = −0.261 97 × 10-12 (Surface 27) E = -0.11208 × 10-4, F = −0.16718 × 10− 7 G = −0.47522 × 10-10, H = −0.16 614 × 10-12 −φ12W/ Φ3= 2.426, φ3/ Φ4= 0.745, D12W・ ΦW= 0. 6809
【００１８】実施例２ ｆ＝29.099〜69.499〜101.999 ，Ｆ／4.600 〜5.250 〜
5.800 ２ω＝73.18 °〜34.54 °〜23.92 ° ｒ1 ＝245.5580 ｄ1 ＝1.5000 ｎ1 ＝1.84666 ν1 ＝23.78 ｒ2 ＝60.5111 ｄ2 ＝5.9800 ｎ2 ＝1.61700 ν2 ＝62.79 ｒ3 ＝-214.0988 ｄ3 ＝0.1400 ｒ4 ＝43.0027 ｄ4 ＝3.9700 ｎ3 ＝1.83481 ν3 ＝42.72 ｒ5 ＝113.0478 ｄ5 ＝Ｄ1 （可変） ｒ6 ＝59.1089 ｄ6 ＝1.1000 ｎ4 ＝1.83400 ν4 ＝37.16 ｒ7 ＝15.1392 ｄ7 ＝5.4513 ｒ8 ＝-43.4616 ｄ8 ＝1.1000 ｎ5 ＝1.83481 ν5 ＝42.72 ｒ9 ＝33.1789 ｄ9 ＝0.1500 ｒ10＝25.8635 ｄ10＝4.4824 ｎ6 ＝1.84666 ν6 ＝23.88 ｒ11＝-36.3286 ｄ11＝0.2697 ｒ12＝-31.4292 ｄ12＝0.8500 ｎ7 ＝1.83481 ν7 ＝42.72 ｒ13＝82.0574 ｄ13＝0.3980 ｒ14＝141.6533 ｄ14＝1.7500 ｎ8 ＝1.84666 ν8 ＝23.78 ｒ15＝-1145.1345 ｄ15＝Ｄ2 （可変） ｒ16＝∞（絞り） ｄ16＝0.5500 ｒ17＝51.4242 ｄ17＝1.6500 ｎ9 ＝1.66446 ν9 ＝35.81 ｒ18＝-122.4425 ｄ18＝0.1500 ｒ19＝35.0977 ｄ19＝2.1254 ｎ10＝1.49700 ν10＝81.61 ｒ20＝-67.9016 ｄ20＝0.7944 ｒ21＝-29.2974 ｄ21＝0.9000 ｎ11＝1.80100 ν11＝34.97 ｒ22＝-3505.4595 ｄ22＝Ｄ3 （可変） ｒ23＝158.3762 ｄ23＝4.0753 ｎ12＝1.80400 ν12＝46.57 ｒ24＝-59.1848 ｄ24＝0.1500 ｒ25＝72.9003 ｄ25＝6.5500 ｎ13＝1.84666 ν13＝23.88 ｒ26＝27.5707 ｄ26＝1.9948 ｒ27＝64.6134 ｄ27＝5.0041 ｎ14＝1.49700 ν14＝81.61 ｒ28＝-36.2909 ｄ28＝0.1000 ｒ29＝21.4917 ｄ29＝2.4938 ｎ15＝1.53113 ν15＝62.44 ｒ30＝21.6850 ｄ30＝Ｄ4 （可変） ｒ31＝155.8758 ｄ31＝3.5500 ｎ16＝1.61700 ν16＝62.79 ｒ32＝-129.8180 ｄ32＝2.8521 ｒ33＝-37.5702 ｄ33＝1.7000 ｎ17＝1.80610 ν17＝33.27 ｒ34＝-54.0355 ｆ 29.099 69.499 101.999 Ｄ1 1.150 16.058 22.601 Ｄ2 13.761 4.666 1.400 Ｄ3 11.028 4.289 1.800 Ｄ4 6.976 29.937 37.914 −φ12W ／φ3 ＝2.881 ，φ3 ／φ4 ＝0.62834 ，Ｄ
12W ・ φW ＝0.9121Example 2 f = 29.099 to 69.499 to 101.999, F / 4.600 to 5.250 to
5.800 2ω = 73.18 ° to 34.54 ° to 23.92 ° r 1 = 245.5580 d 1 = 1.5000 n 1 = 1.84666 ν 1 = 23.78 r 2 = 60.5111 d 2 = 5.9800 n 2 = 1.61700 ν 2 = 62.79 r 3 = -214.0988 d 3 = 0.1400 r 4 = 43.0027 d 4 = 3.9700 n 3 = 1.83481 ν 3 = 42.72 r 5 = 113.0478 d 5 = D 1 ( variable) r 6 = 59.1089 d 6 = 1.1000 n 4 = 1.83400 ν 4 = 37.16 r 7 = 15.1392 d 7 = 5.4513 r 8 = -43.4616 d 8 = 1.1000 n 5 = 1.83481 v 5 = 42.72 r 9 = 33.1789 d 9 = 0.1500 r 10 = 25.8635 d 10 = 4.4824 n 6 = 1.84666 v 6 = 23.88 r 11 = -36.3286 d 11 = 0.2697 r 12 = -31.4292 d 12 = 0.8500 n 7 = 1.83481 ν 7 = 42.72 r 13 = 82.0574 d 13 = 0.3980 r 14 = 141.6533 d 14 = 1.7500 n 8 = 1.84666 ν 8 = 23.78 r 15 = -1145.1345 d 15 = D 2 (variable) r 16 = ∞ (stop) d 16 = 0.5500 r 17 = 51.4242 d 17 = 1.6500 n 9 = 1.66446 ν 9 = 35.81 r 18 = -122.4425 d 18 = 0.1500 r 19 = 35.0977 19 = 2.1254 n 10 = 1.49700 ν 10 = 81.61 r 20 = -67.9016 d 20 = 0.7944 r 21 = -29.2974 d 21 = 0.9000 n 11 = 1.80100 ν 11 = 34.97 r 22 = -3505.4595 d 22 = D 3 ( variable) r 23 = 158.3762 d 23 = 4.0753 n 12 = 1.80400 v 12 = 46.57 r 24 = -59.1848 d 24 = 0.1500 r 25 = 72.9003 d 25 = 6.5500 n 13 = 1.84666 v 13 = 23.88 r 26 = 27.5707 d 26 = 1.9948 r 27 = 64.6134 d 27 = 5.0041 n 14 = 1.49700 ν 14 = 81.61 r 28 = -36.2909 d 28 = 0.1000 r 29 = 21.4917 d 29 = 2.4938 n 15 = 1.53113 ν 15 = 62.44 r 30 = 21.6850 d 30 = D 4 ( Variable) r 31 = 155.8758 d 31 = 3.5500 n 16 = 1.61700 v 16 = 62.79 r 32 = -129.8180 d 32 = 2.8521 r 33 = -37.5702 d 33 = 1.7000 n 17 = 1.80610 v 17 = 33.27 r 34 = -54.0355 f 29.099 69.499 101.999 D 1 1.150 16.058 22.601 D 2 13.761 4.666 1.400 D 3 11.028 4.289 1.800 D 4 6.976 29.937 37.914 -φ 12W / φ 3 = 2.881, φ 3 / φ 4 = 0 .62834, D
12W・ φ W = 0.9121
【００１９】実施例３ ｆ＝24.386〜60.691〜81.546，Ｆ／4.600 〜5.250 〜5.
800 ２ω＝83.06 °〜39.18 °〜29.68 ° ｒ1 ＝256.4460 ｄ1 ＝1.8000 ｎ1 ＝1.84666 ν1 ＝23.78 ｒ2 ＝57.8731 ｄ2 ＝6.5567 ｎ2 ＝1.72600 ν2 ＝53.56 ｒ3 ＝-1039.8970 ｄ3 ＝0.1400 ｒ4 ＝43.4946 ｄ4 ＝4.3780 ｎ3 ＝1.83481 ν3 ＝42.72 ｒ5 ＝103.4886 ｄ5 ＝Ｄ1 （可変） ｒ6 ＝53.1903 ｄ6 ＝1.2500 ｎ4 ＝1.83400 ν4 ＝37.16 ｒ7 ＝13.7602 ｄ7 ＝5.3699 ｒ8 ＝-76.9204 ｄ8 ＝1.1000 ｎ5 ＝1.83481 ν5 ＝42.72 ｒ9 ＝24.0978 ｄ9 ＝0.1500 ｒ10＝16.3460 ｄ10＝4.5845 ｎ6 ＝1.67270 ν6 ＝32.10 ｒ11＝-41.4330 ｄ11＝0.3986 ｒ12＝-31.9263 ｄ12＝1.1000 ｎ7 ＝1.83481 ν7 ＝42.72 ｒ13＝49.5896 ｄ13＝0.5160 ｒ14＝64.4392 ｄ14＝1.7929 ｎ8 ＝1.84666 ν8 ＝23.78 ｒ15＝-229.7492 ｄ15＝Ｄ2 （可変） ｒ16＝∞（絞り） ｄ16＝1.5500 ｒ17＝34.3699 ｄ17＝1.8000 ｎ9 ＝1.83400 ν9 ＝37.16 ｒ18＝-164.2951 ｄ18＝0.1500 ｒ19＝49.6801 ｄ19＝2.8500 ｎ10＝1.62606 ν10＝39.21 ｒ20＝-32.5023 ｄ20＝0.8191 ｒ21＝-20.0941 ｄ21＝1.2000 ｎ11＝1.83400 ν11＝37.16 ｒ22＝52.3036 ｄ22＝Ｄ3 （可変） ｒ23＝-221.1620 ｄ23＝4.1654 ｎ12＝1.65160 ν12＝58.52 ｒ24＝-32.2587 ｄ24＝0.1500 ｒ25＝498.2561 ｄ25＝3.0220 ｎ13＝1.84666 ν13＝23.88 ｒ26＝56.2842 ｄ26＝0.0050 ｒ27＝47.5793 ｄ27＝8.8838 ｎ14＝1.49700 ν14＝81.61 ｒ28＝-34.2228 ｄ28＝0.1500 ｒ29＝48.1548 ｄ29＝2.8500 ｎ15＝1.83481 ν15＝42.72 ｒ30＝51.3595 ｄ30＝Ｄ4 （可変） ｒ31＝145.2900 ｄ31＝3.9800 ｎ16＝1.73400 ν16＝51.49 ｒ32＝-77.3794 ｄ32＝3.5105 ｒ33＝-30.8510 ｄ33＝1.8000 ｎ17＝1.84666 ν17＝23.88 ｒ34＝-62.1072 ｆ 24.386 60.691 81.546 Ｄ1 1.150 16.846 23.279 Ｄ2 8.509 2.427 1.400 Ｄ3 15.777 4.654 1.800 Ｄ4 4.045 27.543 32.211 −φ12W ／φ3 ＝4.153 ，φ3 ／φ4 ＝0.3433，Ｄ12W
・ φW ＝1.1684Example 3 f = 24.386-60.691-81.546, F / 4.600-5.250-5.
800 2ω = 83.06 ° to 39.18 ° to 29.68 ° r 1 = 256.4460 d 1 = 1.8000 n 1 = 1.84666 ν 1 = 23.78 r 2 = 57.8731 d 2 = 6.5567 n 2 = 1.72600 ν 2 = 53.56 r 3 = -1039.8970 d 3 = 0.1400 r 4 = 43.4946 d 4 = 4.3780 n 3 = 1.83481 v 3 = 42.72 r 5 = 103.4886 d 5 = D 1 (variable) r 6 = 53.1903 d 6 = 1.2500 n 4 = 1.83400 v 4 = 37.16 r 7 = 13.7602 d 7 = 5.3699 r 8 = -76.9204 d 8 = 1.1000 n 5 = 1.83481 ν 5 = 42.72 r 9 = 24.0978 d 9 = 0.1500 r 10 = 16.3460 d 10 = 4.5845 n 6 = 1.67270 ν 6 = 32.10 r 11 = -41.4330 d 11 = 0.3986 r 12 = -31.9263 d 12 = 1.1000 n 7 = 1.83481 v 7 = 42.72 r 13 = 49.5896 d 13 = 0.5160 r 14 = 64.4392 d 14 = 1.7929 n 8 = 1.84666 v 8 = 23.78 r 15 = -229.7492 d 15 = D 2 (variable) r 16 = ∞ (aperture) d 16 = 1.5500 r 17 = 34.3699 d 17 = 1.8000 n 9 = 1.83400 ν 9 = 37.16 r 18 = -164.2951 d 18 = 0.1500 r 19 = 49.6801 d 19 = 2.8500 n 10 = 1.62606 ν 10 = 39.21 r 20 = -32.5023 d 20 = 0.8191 r 21 = -20.0941 d 21 = 1.2000 n 11 = 1.83400 ν 11 = 37.16 r 22 = 52.3036 d 22 = D 3 ( Variable) r 23 = -221.1620 d 23 = 4.1654 n 12 = 1.65160 ν 12 = 58.52 r 24 = -32.2587 d 24 = 0.1500 r 25 = 498.2561 d 25 = 3.0220 n 13 = 1.84666 ν 13 = 23.88 r 26 = 56.2842 d 26 = 0.0050 r 27 = 47.5793 d 27 = 8.8838 n 14 = 1.49700 v 14 = 81.61 r 28 = -34.2228 d 28 = 0.1500 r 29 = 48.1548 d 29 = 2.8500 n 15 = 1.83481 v 15 = 42.72 r 30 = 51.3595 d 30 = D 4 ( Variable) r 31 = 145.2900 d 31 = 3.9800 n 16 = 1.73400 v 16 = 51.49 r 32 = -77.3794 d 32 = 3.5105 r 33 = -30.8510 d 33 = 1.8000 n 17 = 1.84666 v 17 = 23.88 r 34 = -62.1072 f 24.386 60.691 81.546 D 1 1.150 16.846 23.279 D 2 8.509 2.427 1.400 D 3 15.777 4.654 1.800 D 4 4.045 27.543 32.211 -φ 12W / φ 3 = 4.153, φ 3 / φ 4 = 0.3433 D 12W
・ Φ W = 1.1684
【００２０】実施例４ ｆ＝24.324〜60.420〜81.157，Ｆ／4.601 〜5.243 〜5.
800 ２ω＝83.22 °〜39.34 °〜29.80 ° ｒ1 ＝466.3524 ｄ1 ＝1.8000 ｎ1 ＝1.84666 ν1 ＝23.78 ｒ2 ＝66.1278 ｄ2 ＝6.9344 ｎ2 ＝1.72916 ν2 ＝54.68 ｒ3 ＝-604.0380 ｄ3 ＝0.1400 ｒ4 ＝40.2449 ｄ4 ＝4.6417 ｎ3 ＝1.79952 ν3 ＝42.24 ｒ5 ＝96.7004 （非球面）ｄ5 ＝Ｄ1 （可変） ｒ6 ＝47.3879 ｄ6 ＝1.2500 ｎ4 ＝1.83400 ν4 ＝37.16 ｒ7 ＝12.9954 （非球面）ｄ7 ＝5.6894 ｒ8 ＝-80.6327 ｄ8 ＝1.1000 ｎ5 ＝1.86300 ν5 ＝41.53 ｒ9 ＝23.9442 ｄ9 ＝0.1500 ｒ10＝16.3780 ｄ10＝4.5332 ｎ6 ＝1.68893 ν6 ＝31.08 ｒ11＝-50.6724 ｄ11＝0.4643 ｒ12＝-36.7238 ｄ12＝1.1000 ｎ7 ＝1.83481 ν7 ＝42.72 ｒ13＝62.8970 ｄ13＝0.6374 ｒ14＝64.9470 ｄ14＝1.7967 ｎ8 ＝1.84666 ν8 ＝23.78 ｒ15＝-265.0812 ｄ15＝Ｄ2 （可変） ｒ16＝∞（絞り） ｄ16＝1.5500 ｒ17＝35.3500 ｄ17＝1.8000 ｎ9 ＝1.83400 ν9 ＝37.16 ｒ18＝-416.2763 ｄ18＝0.1500 ｒ19＝48.7116 ｄ19＝2.8500 ｎ10＝1.62606 ν10＝39.21 ｒ20＝-30.1163 ｄ20＝0.8656 ｒ21＝-19.1738 ｄ21＝1.2000 ｎ11＝1.83400 ν11＝37.16 ｒ22＝60.0814 ｄ22＝Ｄ3 （可変） ｒ23＝-172.5828 ｄ23＝4.1408 ｎ12＝1.65830 ν12＝57.33 ｒ24＝-30.8418 ｄ24＝0.1500 ｒ25＝224.1489 ｄ25＝2.3664 ｎ13＝1.84666 ν13＝23.88 ｒ26＝48.8850 ｄ26＝0.0050 ｒ27＝40.6944 ｄ27＝8.9088 ｎ14＝1.49700 ν14＝81.61 ｒ28＝-38.7874 ｄ28＝0.1500 ｒ29＝53.2907 ｄ29＝2.8500 ｎ15＝1.83481 ν15＝42.72 ｒ30＝55.4375 ｄ30＝Ｄ4 （可変） ｒ31＝163.3132 ｄ31＝3.9800 ｎ16＝1.74100 ν16＝52.68 ｒ32＝-68.4748 ｄ32＝3.7205 ｒ33＝-29.9699 ｄ33＝1.8000 ｎ17＝1.80518 ν17＝25.43 ｒ34＝-63.0815 非球面係数 （第５面）Ｅ＝0.41014 ×10-6，Ｆ＝-0.35799×10-9 Ｇ＝-0.49096×10-12 ，Ｈ＝0.12802 ×10-14 （第７面）Ｅ＝-0.57707×10-5，Ｆ＝0.45895 ×10-8 Ｇ＝-0.49765×10-9，Ｈ＝0.41292 ×10-11 ｆ 24.324 60.420 81.157 Ｄ1 1.150 17.258 23.805 Ｄ2 8.451 2.428 1.436 Ｄ3 15.871 4.767 1.800 Ｄ4 3.938 27.617 32.115 −φ12W ／φ3 ＝5.0323，φ3 ／φ4 ＝0.2693，Ｄ12W
・ φW ＝1.2082Example 4 f = 24.324-60.420-81.157, F / 4.601-5.243-5.
800 2ω = 83.22 ° to 39.34 ° to 29.80 ° r 1 = 466.3524 d 1 = 1.8000 n 1 = 1.84666 ν 1 = 23.78 r 2 = 66.1278 d 2 = 6.9344 n 2 = 1.72916 ν 2 = 54.68 r 3 = -604.0380 d 3 = 0.1400 r 4 = 40.2449 d 4 = 4.6417 n 3 = 1.79952 ν 3 = 42.24 r 5 = 96.7004 ( aspherical) d 5 = D 1 (variable) r 6 = 47.3879 d 6 = 1.2500 n 4 = 1.83400 ν 4 = 37.16 r 7 = 12.9954 (aspherical) d 7 = 5.6894 r 8 = -80.6327 d 8 = 1.1000 n 5 = 1.86300 ν 5 = 41.53 r 9 = 23.9442 d 9 = 0.1500 r 10 = 16.3780 d 10 = 4.5332 n 6 = 1.68893 ν 6 = 31.08 r 11 = -50.6724 d 11 = 0.4643 r 12 = -36.7238 d 12 = 1.1000 n 7 = 1.83481 ν 7 = 42.72 r 13 = 62.8970 d 13 = 0.6374 r 14 = 64.9470 d 14 = 1.7967 n 8 = 1.84666 ν 8 = 23.78 r 15 = -265.0812 d 15 = D 2 ( variable) r 16 = ∞ (stop) d 16 = 1.5500 r 17 = 35.3500 d 17 = 1.8000 n 9 = 1.83400 ν 9 = 37.16 r 18 = -416.2763 d 18 = 0 .1500 r 19 = 48.7116 d 19 = 2.8500 n 10 = 1.62606 v 10 = 39.21 r 20 = -30.1163 d 20 = 0.8656 r 21 = -19.1738 d 21 = 1.2000 n 11 = 1.83400 v 11 = 37.16 r 22 = 60.0814 d 22 = D 3 (variable) r 23 = -172.5828 d 23 = 4.1408 n 12 = 1.65830 v 12 = 57.33 r 24 = -30.8418 d 24 = 0.1500 r 25 = 224.1489 d 25 = 2.3664 n 13 = 1.84666 v 13 = 23.88 r 26 = 48.8850 d 26 = 0.0050 r 27 = 40.6944 d 27 = 8.9088 n 14 = 1.49700 ν 14 = 81.61 r 28 = -38.7874 d 28 = 0.1500 r 29 = 53.2907 d 29 = 2.8500 n 15 = 1.83481 ν 15 = 42.72 r 30 = 55.4375 d 30 = D 4 (variable) r 31 = 163.3132 d 31 = 3.9800 n 16 = 1.74100 ν 16 = 52.68 r 32 = -68.4748 d 32 = 3.7205 r 33 = -29.9699 d 33 = 1.8000 n 17 = 1.80518 ν 17 = 25.43 r 34 = -63.0815 Aspherical surface coefficient (Fifth surface) E = 0.41014 × 10 -6 , F = -0.35799 × 10 -9 G = -0.49096 × 10 -12 , H = 0.12802 × 10 -14 (Seventh surface ) E = -0.5 7707 × 10 -5 , F = 0.45895 × 10 -8 G = -0.49765 × 10 -9 , H = 0.41292 × 10 -11 f 24.324 60.420 81.157 D 1 1.150 17.258 23.805 D 2 8.451 2.428 1.436 D 3 15.871 4.767 1.800 D 4 3.938 27.617 32.115 -φ 12W / φ 3 = 5.0323, φ 3 / φ 4 = 0.2693, D 12W
・ Φ W = 1.2082
【００２１】実施例５ ｆ＝29.150〜72.500〜131.101 ，Ｆ／4.600 〜5.250 〜
5.800 ２ω＝73.08 °〜33.18 °〜18.72 ° ｒ1 ＝352.9924 ｄ1 ＝1.2000 ｎ1 ＝1.84666 ν1 ＝23.88 ｒ2 ＝65.5511 ｄ2 ＝5.3500 ｎ2 ＝1.60300 ν2 ＝65.48 ｒ3 ＝-142.7994 ｄ3 ＝0.1200 ｒ4 ＝40.4029 ｄ4 ＝3.1182 ｎ3 ＝1.83481 ν3 ＝42.72 ｒ5 ＝89.9026 ｄ5 ＝Ｄ1 （可変） ｒ6 ＝50.2583 ｄ6 ＝1.0000 ｎ4 ＝1.83400 ν4 ＝37.16 ｒ7 ＝15.5281 ｄ7 ＝4.7538 ｒ8 ＝-41.4539 ｄ8 ＝1.0000 ｎ5 ＝1.83481 ν5 ＝42.72 ｒ9 ＝34.7125 ｄ9 ＝0.1200 ｒ10＝27.7575 ｄ10＝4.2500 ｎ6 ＝1.84666 ν6 ＝23.78 ｒ11＝-36.9509 ｄ11＝0.2889 ｒ12＝-31.6316 ｄ12＝0.9500 ｎ7 ＝1.83481 ν7 ＝42.72 ｒ13＝95.5771 ｄ13＝0.1200 ｒ14＝79.8815 ｄ14＝1.3000 ｎ8 ＝1.84666 ν8 ＝23.78 ｒ15＝265.1473 ｄ15＝Ｄ2 （可変） ｒ16＝∞（絞り） ｄ16＝0.7500 ｒ17＝58.0891 ｄ17＝1.6500 ｎ9 ＝1.66998 ν9 ＝39.27 ｒ18＝-152.5808 ｄ18＝0.1200 ｒ19＝37.4070 ｄ19＝2.2500 ｎ10＝1.48749 ν10＝70.20 ｒ20＝-62.5234 ｄ20＝0.7666 ｒ21＝-29.7551 ｄ21＝0.9000 ｎ11＝1.83400 ν11＝37.16 ｒ22＝-2560.4039 ｄ22＝Ｄ3 （可変） ｒ23＝92.0608 ｄ23＝3.3000 ｎ12＝1.69680 ν12＝56.49 ｒ24＝-55.3322 ｄ24＝0.1200 ｒ25＝52.2498 ｄ25＝6.1500 ｎ13＝1.84666 ν13＝23.88 ｒ26＝25.9223 ｄ26＝1.9198 ｒ27＝63.1972 ｄ27＝4.0000 ｎ14＝1.49700 ν14＝81.61 ｒ28＝-46.6592 ｄ28＝0.1000 ｒ29＝19.8079 ｄ29＝3.8600 ｎ15＝1.48749 ν15＝70.20 ｒ30＝19.3552 ｄ30＝Ｄ4 （可変） ｒ31＝191.6592 ｄ31＝3.8000 ｎ16＝1.53375 ν16＝55.52 ｒ32＝-63.8354 ｄ32＝1.5882 ｒ33＝-35.8374 ｄ33＝4.6000 ｎ17＝1.83481 ν17＝42.72 ｒ34＝-73.2365 ｆ 29.150 72.500 131.101 Ｄ1 1.150 14.459 24.566 Ｄ2 17.713 6.467 1.400 Ｄ3 14.733 6.375 1.800 Ｄ4 6.452 30.814 42.329 −φ12W ／φ3 ＝3.6038，φ3 ／φ4 ＝0.4230，Ｄ12W
・ φW ＝0.8035Example 5 f = 29.150 to 72.500 to 131.101, F / 4.600 to 5.250 to
5.800 2ω = 73.08 ° to 33.18 ° to 18.72 ° r 1 = 352.9924 d 1 = 1.2000 n 1 = 1.84666 ν 1 = 23.88 r 2 = 65.5511 d 2 = 5.3500 n 2 = 1.60300 ν 2 = 65.48 r 3 = -142.7994 d 3 = 0.1200 r 4 = 40.4029 d 4 = 3.1182 n 3 = 1.83481 ν 3 = 42.72 r 5 = 89.9026 d 5 = D 1 ( variable) r 6 = 50.2583 d 6 = 1.0000 n 4 = 1.83400 ν 4 = 37.16 r 7 = 15.5281 d 7 = 4.7538 r 8 = -41.4539 d 8 = 1.0000 n 5 = 1.83481 ν 5 = 42.72 r 9 = 34.7125 d 9 = 0.1200 r 10 = 27.7575 d 10 = 4.2500 n 6 = 1.84666 ν 6 = 23.78 r 11 = -36.9509 d 11 = 0.2889 r 12 = -31.6316 d 12 = 0.9500 n 7 = 1.83481 ν 7 = 42.72 r 13 = 95.5771 d 13 = 0.1200 r 14 = 79.8815 d 14 = 1.3000 n 8 = 1.84666 ν 8 = 23.78 r 15 = 265.1473 d 15 = D 2 (variable) r 16 = ∞ (aperture) d 16 = 0.7500 r 17 = 58.0891 d 17 = 1.6500 n 9 = 1.66998 ν 9 = 39.27 r 18 = -152.5808 d 18 = 0.1200 r 19 = 37.4070 d 1 9 = 2.2500 n 10 = 1.48749 ν 10 = 70.20 r 20 = -62.5234 d 20 = 0.7666 r 21 = -29.7551 d 21 = 0.9000 n 11 = 1.83400 ν 11 = 37.16 r 22 = -2560.4039 d 22 = D 3 ( variable) r 23 = 92.0608 d 23 = 3.3000 n 12 = 1.69680 v 12 = 56.49 r 24 = -55.3322 d 24 = 0.1200 r 25 = 52.2498 d 25 = 6.1500 n 13 = 1.84666 v 13 = 23.88 r 26 = 25.9223 d 26 = 1.9198 r 27 = 63.1972 d 27 = 4.0000 n 14 = 1.49700 ν 14 = 81.61 r 28 = -46.6592 d 28 = 0.1000 r 29 = 19.8079 d 29 = 3.8600 n 15 = 1.48749 ν 15 = 70.20 r 30 = 19.3552 d 30 = D 4 ( Variable) r 31 = 191.6592 d 31 = 3.8000 n 16 = 1.53375 v 16 = 55.52 r 32 = -63.8354 d 32 = 1.5882 r 33 = -35.8374 d 33 = 4.6000 n 17 = 1.83481 v 17 = 42.72 r 34 = -73.2365 f 29.150 72.500 131.101 D 1 1.150 14.459 24.566 D 2 17.713 6.467 1.400 D 3 14.733 6.375 1.800 D 4 6.452 30.814 42.329 -φ 12W / φ 3 = 3.6038, φ 3 / φ 4 = 0.4230 D 12W
・ Φ W = 0.8035
【００２２】実施例６ ｆ＝２９．１００〜６９．５０２〜１０２．００３，Ｆ／４．６００〜５．２５ ０〜５．８００ ２ω＝７３．１８°〜３４．５２°〜２３．９２° −φ１２Ｗ／φ３＝２．８８０６，φ３／φ４＝０．６２８４，Ｄ１２Ｗ・φＷ ＝０．９１２１ ただしｒ１，ｒ２，・・・はレンズ各面の曲率半径、ｄ
１，ｄ２，・・・は各レンズの肉厚および空気間隔、ｎ
１，ｎ２，・・・は各レンズの屈折率、ν１，ν２，・
・・は各レンズのアッベ数である。Example 6 f = 29.100 to 69.502 to 102.003,F / 4.600-5.25 0 to 5.800 2ω = 73.18 ° to 34.52 ° to 23.92 ° −φ12W/ Φ3= 2.8806, φ3/ Φ4= 0.6284, D12W・ ΦW = 0.9121 where r1, R2,... Are the radius of curvature of each lens surface, d
1, D2,... Indicate the thickness and air space of each lens, n
1, N2,... Is the refractive index of each lens, ν1, Ν2,
Is the Abbe number of each lens.
【００２３】実施例１は、高変倍率のズームレンズで、
図１に示す構成である。第２レンズ群の第６面が非球面
で、これにより歪曲収差の補正を容易にしている。また
第４レンズ群中にも非球面を用い軸外収差を補正するよ
うにしている。これらによって望遠比が０．７２５で小
型になっている。またこの実施例の広角端，中間焦点距
離，望遠端における収差状況は図８，図９，図１０に示
す通りである。Embodiment 1 is a high-magnification zoom lens.
This is the configuration shown in FIG. The sixth surface of the second lens group is an aspheric surface, which facilitates correction of distortion. An aspherical surface is also used in the fourth lens unit to correct off-axis aberrations. As a result, the telephoto ratio is reduced to 0.725 with a small size. The aberrations at the wide angle end, the intermediate focal length, and the telephoto end of this embodiment are as shown in FIGS. 8, 9, and 10.
【００２４】実施例２は、図２に示す構成で広角端にお
ける画角が７３．３°程度で約４倍の変倍率のズームレ
ンズで、非球面は用いていない。この実施例２の広角
端，中間焦点距離，望遠端の収差状況は図１１，図１
２，図１３に示す通りである。Embodiment 2 is a zoom lens having the configuration shown in FIG. 2 and having an angle of view at the wide-angle end of about 73.3 ° and a magnification of about 4 and no aspherical surface. FIGS. 11 and 1 show the aberrations of the second embodiment at the wide-angle end, at the intermediate focal length, and at the telephoto end.
2, as shown in FIG.
【００２５】実施例３および実施例４は、図３，図４に
示す構成で、広角端の画角が８３．２°程度で、変倍率
が約３．４倍の超広角域を含むズームレンズである。Embodiments 3 and 4 have the constructions shown in FIGS. 3 and 4 and have a zoom angle including an ultra wide angle range of about 83.2 ° at the wide angle end and a magnification of about 3.4 times. Lens.
【００２６】実施例３は非球面を用いていない。この実
施例３は射出瞳位置と超広角であることから第４レンズ
群の有効径は大きくなる傾向にある。実施例３の広角
端，中間焦点距離，望遠端における収差状況は、図１
４，図１５，図１６に示す通りである。又実施例４の第
１レンズ群と第２レンズ群とには非球面を用いて歪曲収
差の補正を行なっている。この実施例の広角端，中間焦
点距離，望遠端における収差状況は、図１７，図１８，
図１９に示す通りである。Embodiment 3 does not use an aspherical surface. In Example 3, since the exit pupil position is super-wide-angle, the effective diameter of the fourth lens group tends to be large. FIG. 1 shows aberrations at the wide-angle end, an intermediate focal length, and a telephoto end in the third embodiment.
4, FIG. 15 and FIG. Further, the first lens group and the second lens group of the fourth embodiment use aspherical surfaces to correct distortion. The aberrations at the wide-angle end, intermediate focal length, and telephoto end of this embodiment are shown in FIGS.
This is as shown in FIG.
【００２７】実施例５は、図５に示す構成で、広角端の
画角が７３．３°程度で、変倍率が４．５の広角、高変
倍率のズームレンズである。この実施例の望遠比は約１
である。又そのＭＴＦは図２６，図２７，図２８の通り
である。この実施例５の収差状況は、図２０，図２１，
図２２に示す通りであり（Ａ）は軸又（Ｂ）は軸外の
０．７の位置での軸上物点における白色光での空間周波
数特性である。 Embodiment 5 is a wide-angle, high-magnification zoom lens having the configuration shown in FIG. 5 and having an angle of view at the wide-angle end of about 73.3 ° and a magnification of 4.5. The telephoto ratio of this embodiment is about 1
It is. The MTF is as shown in FIGS. 26, 27 and 28. The aberration states of the fifth embodiment are shown in FIGS.
As shown in FIG. 22, (A) is the axis or (B) is the spatial frequency of white light at the on-axis object point at the off-axis position of 0.7.
It is a numerical characteristic.
【００２８】実施例６は図６に示す構成で、広角端での
画角が７３．３°程度であって、約４倍の変倍率を有す
るズームレンズである。この実施例６の収差状況は、図
２３，図２４，図２５に示す通りである。Embodiment 6 is a zoom lens having the configuration shown in FIG. 6 and having an angle of view of about 73.3 ° at the wide-angle end and having a magnification of about 4 times. The aberration states of the sixth embodiment are as shown in FIGS. 23, 24, and 25.
【００２９】尚実施例中で用いる非球面は光軸方向にｘ
軸、光軸と直角な方向にｙ軸をとった時、次の式で表わ
される。 The aspherical surface used in the embodiment has x in the optical axis direction.
When the y-axis is taken in a direction perpendicular to the axis and the optical axis, it is expressed by the following equation.
【００３０】ただしＣ＝１／ｒ（ｒは非球面の面頂での
曲率半径）、Ｅ，Ｆ，Ｇ，Ｈ，・・・は非球面係数であ
る。Where C = 1 / r (r is the radius of curvature at the top of the aspheric surface), and E, F, G, H,... Are aspherical coefficients.
【００３１】又変倍時各レンズ群が図７に示すような移
動軌跡で移動する。Further, at the time of zooming, each lens group moves along a movement locus as shown in FIG.
【００３２】[0032]
【発明の効果】本発明のズームレンズは、既に述べた通
りの構成にすることにより、前玉径の小さい小型であっ
てしかも高性能で広角を含む高変倍率のレンズ系になし
得た。According to the zoom lens of the present invention, by adopting the above-mentioned structure, a compact lens system having a small front lens diameter, a high performance, and a high magnification including a wide angle can be obtained.
【図１】実施例１の断面図FIG. 1 is a cross-sectional view of a first embodiment.
【図２】実施例２の断面図FIG. 2 is a sectional view of a second embodiment.
【図３】実施例３の断面図FIG. 3 is a cross-sectional view of a third embodiment.
【図４】実施例４の断面図FIG. 4 is a sectional view of a fourth embodiment.
【図５】実施例５の断面図FIG. 5 is a sectional view of a fifth embodiment.
【図６】実施例６の断面図FIG. 6 is a sectional view of a sixth embodiment.
【図７】本発明のレンズ系の各レンズ群の移動軌跡を示
す図FIG. 7 is a diagram showing a movement locus of each lens group of the lens system of the present invention.
【図８】実施例１の広角端における収差曲線図FIG. 8 is an aberration curve diagram at the wide angle end according to the first embodiment.
【図９】実施例１の中間焦点距離における収差曲線図FIG. 9 is an aberration curve diagram at the intermediate focal length according to the first embodiment.
【図１０】実施例１の望遠端における収差曲線図FIG. 10 is an aberration curve diagram at the telephoto end according to the first embodiment.
【図１１】実施例２の広角端における収差曲線図FIG. 11 is an aberration curve diagram at the wide angle end according to the second embodiment.
【図１２】実施例２の中間焦点距離における収差曲線図FIG. 12 is an aberration curve diagram at the intermediate focal length according to the second embodiment.
【図１３】実施例２の望遠端における収差曲線図FIG. 13 is an aberration curve diagram at the telephoto end according to the second embodiment.
【図１４】実施例３の広角端における収差曲線図FIG. 14 is an aberration curve diagram at the wide angle end according to the third embodiment.
【図１５】実施例３の中間焦点距離における収差曲線図FIG. 15 is an aberration curve diagram at the intermediate focal length according to the third embodiment.
【図１６】実施例３の望遠端における収差曲線図FIG. 16 is an aberration curve diagram at the telephoto end according to the third embodiment.
【図１７】実施例４の広角端における収差曲線図FIG. 17 is an aberration curve diagram at the wide angle end according to the fourth embodiment.
【図１８】実施例４の中間焦点距離における収差曲線図FIG. 18 is an aberration curve diagram at an intermediate focal length according to the fourth embodiment.
【図１９】実施例４の望遠端における収差曲線図FIG. 19 is an aberration curve diagram at the telephoto end in Example 4.
【図２０】実施例５の広角端における収差曲線図FIG. 20 is an aberration curve diagram at the wide angle end according to the fifth embodiment.
【図２１】実施例５の中間焦点距離における収差曲線図FIG. 21 is an aberration curve diagram at an intermediate focal length according to the fifth embodiment.
【図２２】実施例５の望遠端における収差曲線図FIG. 22 is an aberration curve diagram at the telephoto end in Example 5.
【図２３】実施例６の広角端における収差曲線図FIG. 23 is an aberration curve diagram at the wide angle end according to the sixth embodiment.
【図２４】実施例６の中間焦点距離における収差曲線図FIG. 24 is an aberration curve diagram at the intermediate focal length of the sixth embodiment.
【図２５】実施例６の望遠端における収差曲線図FIG. 25 is an aberration curve diagram at the telephoto end in Example 6.
【図２６】実施例５の広角端におけるＭＴＦを示す図FIG. 26 is a diagram illustrating an MTF at a wide-angle end according to a fifth embodiment.
【図２７】実施例５の中間焦点距離におけるＭＴＦを示
す図FIG. 27 is a diagram illustrating an MTF at an intermediate focal length according to the fifth embodiment.
【図２８】実施例５の望遠端におけるＭＴＦを示す図FIG. 28 is a diagram illustrating an MTF at a telephoto end according to a fifth embodiment.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平３−177806（ＪＰ，Ａ) 特開 昭64−7013（ＪＰ，Ａ) 特開 昭64−7012（ＪＰ，Ａ) 特開 昭63−221312（ＪＰ，Ａ) 特開 昭63−208015（ＪＰ，Ａ) 特開 平４−162009（ＪＰ，Ａ) 特開 平４−96012（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) G02B 15/20 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-3-177806 (JP, A) JP-A 64-7013 (JP, A) JP-A 64-7012 (JP, A) JP-A 63-177 221312 (JP, A) JP-A-63-208015 (JP, A) JP-A-4-162009 (JP, A) JP-A-4-96012 (JP, A) (58) Fields investigated (Int. 7 , DB name) G02B 15/20
Claims (6)
群と、負の屈折力の第２レンズ群と、正の屈折力の第３
レンズ群と、正の屈折力の第４レンズ群と、負の屈折力
の第５レンズ群とより構成され、広角端より望遠端に変
倍する際に、第１レンズ群と第２レンズ群、第４レンズ
群と第５レンズ群の夫々の間隔が大きくなるよう移動し
かつ第２レンズ群と第３レンズ群、第３レンズ群と第４
レンズ群との群間隔が小さくなるように第１レンズ群か
ら第４レンズ群までを移動し、第５レンズ群は変倍中固
定であるレンズ系で、前記第２レンズ群が物体側より順
に、物体側に凸面を向けた第１負レンズと、第２負レン
ズ、及び、正レンズと、空気レンズにより隔てられた負
レンズと空気レンズにより隔てられた正レンズからなる
トリプレットとより構成され、下記条件（１−１），
（２），（３）を満足するズームレンズ。 （１−１） ２．１＜−φ12W ／φ3 ＜８．０ （２） ０．１５＜φ3 ／φ4 ＜２．０ （３） ０．２＜Ｄ12W・φW ＜１．８ ただし、φW は広角端における全系の屈折力、φ12W は
広角端における第１レンズ群と第２レンズ群との合成の
屈折力、φ3 ，φ4 は夫々第３レンズ群および第４レン
ズ群の屈折力、Ｄ12W は広角端における第１レンズ群の
第１面の面頂から第２レンズ群の最終面の面頂までの光
軸上の長さである。A first lens unit having a positive refractive power, a second lens unit having a negative refractive power, and a third lens unit having a positive refractive power.
A first lens unit and a second lens unit for changing the magnification from the wide-angle end to the telephoto end, including a lens unit, a fourth lens unit having a positive refractive power, and a fifth lens unit having a negative refractive power. Move so as to increase the distance between the fourth lens group and the fifth lens group, and move the second lens group and the third lens group, and the third lens group and the fourth lens group.
The first lens group is moved from the fourth lens group to the fourth lens group so as to reduce the distance between the lens groups, and the fifth lens group is a lens system that is fixed during zooming, and the second lens group is arranged in order from the object side. A first negative lens having a convex surface facing the object side, a second negative lens, a positive lens, and a triplet including a negative lens separated by an air lens and a positive lens separated by an air lens, The following conditions ( 1-1 ),
A zoom lens that satisfies (2) and (3). (1-1) 2.1 <-φ 12W / φ 3 <8.0 (2) 0.15 <φ 3 / φ 4 <2.0 (3) 0.2 <D 12W · φ W <1. 8 where φ W is the refractive power of the entire system at the wide-angle end, φ 12 W is the combined refractive power of the first lens unit and the second lens unit at the wide-angle end, and φ 3 and φ 4 are the third lens unit and the fourth lens unit respectively. The refractive power, D 12W , of the four lens units is the length along the optical axis from the top of the first surface of the first lens unit to the last surface of the second lens unit at the wide-angle end.
群と、負の屈折力の第２レンズ群と、正の屈折力の第３
レンズ群と、正の屈折力の第４レンズ群と、負の屈折力
の第５レンズ群とより構成され、広角端より望遠端に変
倍する際に、第１レンズ群と第２レンズ群、第４レンズ
群と第５レンズ群の夫々の間隔が大きくなるよう移動し
かつ第２レンズ群と第３レンズ群、第３レンズ群と第４
レンズ群との群間隔が小さくなるように第１レンズ群か
ら第４レンズ群までを移動し、第５レンズ群は変倍中固
定であるレンズ系で、前記第２レンズ群が物体側より順
に、物体側に凸面を向けた第１負レンズと、第２負レン
ズ、及び、正レンズと、空気レンズにより隔てられた負
レンズと空気レンズにより隔てられた正レンズからなる
トリプレットとより構成され、下記条件（１），（２−
１），（３）を満足するズームレンズ。 （１） １．０＜−φ12W ／φ3 ＜８．０ （２−１） ０．１５＜φ3 ／φ4 ＜１．０ （３） ０．２＜Ｄ12W・φW ＜１．８ ただし、φW は広角端における全系の屈折力、φ12W は
広角端における第１レンズ群と第２レンズ群との合成の
屈折力、φ3 ，φ4 は夫々第３レンズ群および第４レン
ズ群の屈折力、Ｄ12W は広角端における第１レンズ群の
第１面の面頂から第２レンズ群の最終面の面頂までの光
軸上の長さである。2. A first lens group having a positive refractive power, a second lens group having a negative refractive power, and a third lens group having a positive refractive power, in order from the object side.
A first lens unit and a second lens unit for changing the magnification from the wide-angle end to the telephoto end, including a lens unit, a fourth lens unit having a positive refractive power, and a fifth lens unit having a negative refractive power. Move so as to increase the distance between the fourth lens group and the fifth lens group, and move the second lens group and the third lens group, and the third lens group and the fourth lens group.
The first lens group is moved from the fourth lens group to the fourth lens group so as to reduce the distance between the lens groups, and the fifth lens group is a lens system that is fixed during zooming, and the second lens group is arranged in order from the object side. A first negative lens having a convex surface facing the object side, a second negative lens, a positive lens, and a triplet including a negative lens separated by an air lens and a positive lens separated by an air lens, The following conditions (1), ( 2-
1 ) A zoom lens satisfying (3). (1) 1.0 <-φ 12W / φ 3 <8.0 (2-1) 0.15 <φ 3 / φ 4 <1.0 (3) 0.2 <D 12W · φ W <1. 8 where φ W is the refractive power of the entire system at the wide-angle end, φ 12 W is the combined refractive power of the first lens unit and the second lens unit at the wide-angle end, and φ 3 and φ 4 are the third lens unit and the fourth lens unit respectively. The refractive power, D 12W , of the four lens units is the length along the optical axis from the top of the first surface of the first lens unit to the last surface of the second lens unit at the wide-angle end.
群と、負の屈折力の第２レンズ群と、正の屈折力の第３
レンズ群と、正の屈折力の第４レンズ群と、負の屈折力
の第５レンズ群とより構成され、広角端より望遠端に変
倍する際に、第１レンズ群と第２レンズ群、第４レンズ
群と第５レンズ群の夫々の間隔が大きくなるよう移動し
かつ第２レンズ群と第３レンズ群、第３レンズ群と第４
レンズ群との群間隔が小さくなるように第１レンズ群か
ら第４レンズ群までを移動し、第５レンズ群は変倍中固
定であるレンズ系で、前記第２レンズ群が物体側より順
に、物体側に凸面を向けた第１負レンズと、第２負レン
ズ、及び、正レンズと、空気レンズにより隔てられた負
レンズと空気レンズにより隔てられた正レンズからなる
トリプレットとより構成され、下記条件（１），
（２），（３−１）を満足するズームレンズ。 （１） １．０＜−φ12W ／φ3 ＜８．０ （２） ０．１５＜φ3 ／φ4 ＜２．０ （３−１） ０．６５＜Ｄ12W・φW ＜１．８ ただし、φW は広角端における全系の屈折力、φ12W は
広角端における第１レンズ群と第２レンズ群との合成の
屈折力、φ3 ，φ4 は夫々第３レンズ群および第４レン
ズ群の屈折力、Ｄ12W は広角端における第１レンズ群の
第１面の面頂から第２レンズ群の最終面の面頂までの光
軸上の長さである。3. A first lens group having a positive refractive power, a second lens group having a negative refractive power, and a third lens group having a positive refractive power, in order from the object side.
A first lens unit and a second lens unit for changing the magnification from the wide-angle end to the telephoto end, including a lens unit, a fourth lens unit having a positive refractive power, and a fifth lens unit having a negative refractive power. Move so as to increase the distance between the fourth lens group and the fifth lens group, and move the second lens group and the third lens group, and the third lens group and the fourth lens group.
The first lens group is moved from the fourth lens group to the fourth lens group so as to reduce the distance between the lens groups, and the fifth lens group is a lens system that is fixed during zooming, and the second lens group is arranged in order from the object side. A first negative lens having a convex surface facing the object side, a second negative lens, a positive lens, and a triplet including a negative lens separated by an air lens and a positive lens separated by an air lens, The following conditions (1),
A zoom lens that satisfies (2) and ( 3-1 ). (1) 1.0 <−φ 12 W / φ 3 <8.0 (2) 0.15 <φ 3 / φ 4 <2.0 ( 3-1 ) 0.65 <D 12W · φ W <1. 8 where φ W is the refractive power of the entire system at the wide-angle end, φ 12 W is the combined refractive power of the first lens unit and the second lens unit at the wide-angle end, and φ 3 and φ 4 are the third lens unit and the fourth lens unit respectively. The refractive power, D 12W , of the four lens units is the length along the optical axis from the top of the first surface of the first lens unit to the last surface of the second lens unit at the wide-angle end.
群と、負の屈折力の第２レンズ群と、正の屈折力の第３
レンズ群と、正の屈折力の第４レンズ群と、負の屈折力
の第５レンズ群とより構成され、広角端より望遠端に変
倍する際に、第１レンズ群と第２レンズ群、第４レンズ
群と第５レンズ群の夫々の間隔が大きくなるよう移動し
かつ第２レンズ群と第３レンズ群、第３レンズ群と第４
レンズ群との群間隔が小さくなるように第１レンズ群か
ら第４レンズ群までを移動し、第５レンズ群は変倍中固
定であるレンズ系で、前記第２レンズ群が物体側より順
に、物体側に凸面を向けた第１負レンズと、第２負レン
ズ、及び、正レンズと、空気レンズにより隔てられた負
レンズと空気レンズにより隔てられた正レンズからなる
トリプレットとより構成され、下記条件（１−２），
（２−２），（３）を満足するズームレンズ。 （１−２） １．７＜−φ12W ／φ3 ＜８．０ （２−２） ０．１５＜φ3 ／φ4 ＜１．２ （３） ０．２＜Ｄ12W・φW ＜１．８ ただし、φW は広角端における全系の屈折力、φ12W は
広角端における第１レンズ群と第２レンズ群との合成の
屈折力、φ3 ，φ4 は夫々第３レンズ群および第４レン
ズ群の屈折力、Ｄ12W は広角端における第１レンズ群の
第１面の面頂から第２レンズ群の最終面の面頂までの光
軸上の長さである。4. A first lens group having a positive refractive power, a second lens group having a negative refractive power, and a third lens group having a positive refractive power are arranged in order from the object side.
A first lens unit and a second lens unit for changing the magnification from the wide-angle end to the telephoto end, including a lens unit, a fourth lens unit having a positive refractive power, and a fifth lens unit having a negative refractive power. Move so as to increase the distance between the fourth lens group and the fifth lens group, and move the second lens group and the third lens group, and the third lens group and the fourth lens group.
The first lens group is moved from the fourth lens group to the fourth lens group so as to reduce the distance between the lens groups, and the fifth lens group is a lens system that is fixed during zooming, and the second lens group is arranged in order from the object side. A first negative lens having a convex surface facing the object side, a second negative lens, a positive lens, and a triplet including a negative lens separated by an air lens and a positive lens separated by an air lens, The following conditions ( 1-2 ),
A zoom lens satisfying ( 2-2 ) and (3). (1-2) 1.7 <-φ 12W / φ 3 <8.0 (2-2) 0.15 <φ 3 / φ 4 <1.2 (3) 0.2 <D 12W · φ W < 1.8 where φ W is the refractive power of the entire system at the wide-angle end, φ 12 W is the combined refractive power of the first and second lens groups at the wide-angle end, and φ 3 and φ 4 are the third lens groups, respectively. And the refractive power D 12W of the fourth lens unit is the length on the optical axis from the top of the first surface of the first lens unit at the wide angle end to the top of the final surface of the second lens unit.
群と、負の屈折力の第２レンズ群と、正の屈折力の第３
レンズ群と、正の屈折力の第４レンズ群と、負の屈折力
の第５レンズ群とより構成され、広角端より望遠端に変
倍する際に、第１レンズ群と第２レンズ群、第４レンズ
群と第５レンズ群の夫々の間隔が大きくなるよう移動し
かつ第２レンズ群と第３レンズ群、第３レンズ群と第４
レンズ群との群間隔が小さくなるように第１レンズ群か
ら第４レンズ群までを移動し、第５レンズ群は変倍中固
定であるレンズ系で、前記第２レンズ群が物体側より順
に、物体側に凸面を向けた第１負レンズと、第２負レン
ズ、及び、正レンズと、空気レンズにより隔てられた負
レンズと空気レンズにより隔てられた正レンズからなる
トリプレットとより構成され、下記条件（１），（２−
２），（３−２）を満足するズームレンズ。 （１） １．０＜−φ12W ／φ3 ＜８．０ （２−２） ０．１５＜φ3 ／φ4 ＜１．２ （３−２） ０．６＜Ｄ12W・φW ＜１．８ ただし、φW は広角端における全系の屈折力、φ12W は
広角端における第１レンズ群と第２レンズ群との合成の
屈折力、φ3 ，φ4 は夫々第３レンズ群および第４レン
ズ群の屈折力、Ｄ12W は広角端における第１レンズ群の
第１面の面頂から第２レンズ群の最終面の面頂までの光
軸上の長さである。5. A first lens group having a positive refractive power, a second lens group having a negative refractive power, and a third lens group having a positive refractive power, in order from the object side.
A first lens unit and a second lens unit for changing the magnification from the wide-angle end to the telephoto end, including a lens unit, a fourth lens unit having a positive refractive power, and a fifth lens unit having a negative refractive power. Move so as to increase the distance between the fourth lens group and the fifth lens group, and move the second lens group and the third lens group, and the third lens group and the fourth lens group.
The first lens group is moved from the fourth lens group to the fourth lens group so as to reduce the distance between the lens groups, and the fifth lens group is a lens system that is fixed during zooming, and the second lens group is arranged in order from the object side. A first negative lens having a convex surface facing the object side, a second negative lens, a positive lens, and a triplet including a negative lens separated by an air lens and a positive lens separated by an air lens, The following conditions (1), ( 2-
2 ) A zoom lens satisfying ( 3-2 ). (1) 1.0 <-φ 12W / φ 3 <8.0 (2-2) 0.15 <φ 3 / φ 4 <1.2 (3-2) 0.6 <D 12W · φ W < 1.8 where φ W is the refractive power of the entire system at the wide-angle end, φ 12 W is the combined refractive power of the first and second lens groups at the wide-angle end, and φ 3 and φ 4 are the third lens groups, respectively. And the refractive power D 12W of the fourth lens unit is the length on the optical axis from the top of the first surface of the first lens unit at the wide angle end to the top of the final surface of the second lens unit.
群と、負の屈折力の第２レンズ群と、正の屈折力の第３
レンズ群と、正の屈折力の第４レンズ群と、負の屈折力
の第５レンズ群とより構成され、広角端より望遠端に変
倍する際に、第１レンズ群と第２レンズ群、第４レンズ
群と第５レンズ群の夫々の間隔が大きくなるよう移動し
かつ第２レンズ群と第３レンズ群、第３レンズ群と第４
レンズ群との群間隔が小さくなるように第１レンズ群か
ら第４レンズ群までを移動し、第５レンズ群は変倍中固
定であるレンズ系で、前記第２レンズ群が物体側より順
に、物体側に凸面を向けた第１負レンズと、第２負レン
ズ、及び、正レンズと、空気レンズにより隔てられた負
レンズと空気レンズにより隔てられた正レンズからなる
トリプレットとより構成され、下記条件（１−２），
（２），（３−２）を満足するズームレンズ。 （１−２） １．７＜−φ12W ／φ3 ＜８．０ （２） ０．１５＜φ3 ／φ4 ＜２．０ （３−２） ０．６＜Ｄ12W・φW ＜１．８ ただし、φW は広角端における全系の屈折力、φ12W は
広角端における第１レンズ群と第２レンズ群との合成の
屈折力、φ3 ，φ4 は夫々第３レンズ群および第４レン
ズ群の屈折力、Ｄ12W は広角端における第１レンズ群の
第１面の面頂から第２レンズ群の最終面の面頂までの光
軸上の長さである。6. A first lens unit having a positive refractive power, a second lens unit having a negative refractive power, and a third lens unit having a positive refractive power, in order from the object side.
A first lens unit and a second lens unit for changing the magnification from the wide-angle end to the telephoto end, including a lens unit, a fourth lens unit having a positive refractive power, and a fifth lens unit having a negative refractive power. Move so as to increase the distance between the fourth lens group and the fifth lens group, and move the second lens group and the third lens group, and the third lens group and the fourth lens group.
The first lens group is moved from the fourth lens group to the fourth lens group so as to reduce the distance between the lens groups, and the fifth lens group is a lens system that is fixed during zooming, and the second lens group is arranged in order from the object side. A first negative lens having a convex surface facing the object side, a second negative lens, a positive lens, and a triplet including a negative lens separated by an air lens and a positive lens separated by an air lens, The following conditions ( 1-2 ),
A zoom lens that satisfies (2) and ( 3-2 ). (1-2) 1.7 <-φ 12W / φ 3 <8.0 (2) 0.15 <φ 3 / φ 4 <2.0 (3-2) 0.6 <D 12W · φ W < 1.8 where φ W is the refractive power of the entire system at the wide-angle end, φ 12 W is the combined refractive power of the first and second lens groups at the wide-angle end, and φ 3 and φ 4 are the third lens groups, respectively. And the refractive power D 12W of the fourth lens unit is the length on the optical axis from the top of the first surface of the first lens unit at the wide angle end to the top of the final surface of the second lens unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30623792A JP3331226B2 (en) | 1992-10-20 | 1992-10-20 | Zoom lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30623792A JP3331226B2 (en) | 1992-10-20 | 1992-10-20 | Zoom lens |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06130300A JPH06130300A (en) | 1994-05-13 |
| JP3331226B2 true JP3331226B2 (en) | 2002-10-07 |
Family
ID=17954652
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP30623792A Expired - Fee Related JP3331226B2 (en) | 1992-10-20 | 1992-10-20 | Zoom lens |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3331226B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012194278A (en) * | 2011-03-15 | 2012-10-11 | Sony Corp | Zoom lens and imaging apparatus |
| JP6326712B2 (en) * | 2012-10-30 | 2018-05-23 | 株式会社ニコン | Variable magnification optical system, optical device |
| WO2014069448A1 (en) | 2012-10-30 | 2014-05-08 | 株式会社ニコン | Variable magnification optical system, optical device, and production method for variable magnification optical system |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2691529B2 (en) * | 1987-02-25 | 1997-12-17 | 株式会社リコー | Zoom lens for close-up photography |
| JPS63221312A (en) * | 1987-03-11 | 1988-09-14 | Ricoh Co Ltd | Small-sized high variable power lens |
| JPS647012A (en) * | 1987-06-30 | 1989-01-11 | Ricoh Kk | Zoom lens enabling close-up photography |
| JPS647013A (en) * | 1987-06-30 | 1989-01-11 | Ricoh Kk | Small-sized high variable power zoom lens |
| JP2596838B2 (en) * | 1989-12-06 | 1997-04-02 | オリンパス光学工業株式会社 | Zoom lens |
| JP3063035B2 (en) * | 1990-08-13 | 2000-07-12 | オリンパス光学工業株式会社 | Zoom lens |
| JP3063036B2 (en) * | 1990-10-26 | 2000-07-12 | オリンパス光学工業株式会社 | Zoom lens |
-
1992
- 1992-10-20 JP JP30623792A patent/JP3331226B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06130300A (en) | 1994-05-13 |
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