JPH02201410A - Three-group zoom lens - Google Patents
Three-group zoom lensInfo
- Publication number
- JPH02201410A JPH02201410A JP1021028A JP2102889A JPH02201410A JP H02201410 A JPH02201410 A JP H02201410A JP 1021028 A JP1021028 A JP 1021028A JP 2102889 A JP2102889 A JP 2102889A JP H02201410 A JPH02201410 A JP H02201410A
- Authority
- JP
- Japan
- Prior art keywords
- group
- lens
- groups
- wide
- object side
- 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.)
- Granted
Links
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- 230000014509 gene expression Effects 0.000 description 14
- 230000004075 alteration Effects 0.000 description 9
- 239000000463 material Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 206010010071 Coma Diseases 0.000 description 2
- 241000600169 Maro Species 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 102100032501 Death-inducer obliterator 1 Human genes 0.000 description 1
- 101710081796 Death-inducer obliterator 1 Proteins 0.000 description 1
- 101000909811 Homo sapiens Protein cornichon homolog 2 Proteins 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
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Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B15/00—Optical objectives with means for varying the magnification
- G02B15/14—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective
- G02B15/143—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective having three groups only
- G02B15/1435—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective having three groups only the first group being negative
- G02B15/143503—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective having three groups only the first group being negative arranged -+-
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lenses (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明はレンズシャッターカメラ、ビデオカメラ等に好
適な小型の３群ズームレンズに関し、特にバックフォー
カスを短くすると共にレンズ全長（第ルンズ面から像面
までの距離）の短縮化を図った小型の３群ズームレンズ
に関するものである。Detailed Description of the Invention (Industrial Application Field) The present invention relates to a compact three-group zoom lens suitable for lens shutter cameras, video cameras, etc. This invention relates to a compact three-group zoom lens that aims to shorten the distance (to the surface).
（従来の技術）
最近レンズシャッターカメラ、ビデオカメラ等において
は、カメラの小型化に伴いレンズ全長の短い小型のズー
ムレンズが要求されている。このうち標準画角（撮影画
角２ω＝４７度で３５ｍｍスチルカメラに換算すると焦
点距１１５０ｍｍ程度）を含む比較的小型のズームレン
ズを本出願人は例えば特開昭６３−２７１２１４号公報
で提案している。(Prior Art) Recently, with the miniaturization of cameras such as lens shutter cameras and video cameras, there has been a demand for compact zoom lenses with short overall lens lengths. Among these, the present applicant proposed a relatively small zoom lens with a standard angle of view (photographing angle of view 2ω = 47 degrees, focal length of about 1150 mm when converted to a 35 mm still camera) in, for example, Japanese Patent Application Laid-Open No. 63-271214. ing.
同公報では物体側より順に負の屈折力の第１群と正の屈
折力の第２群、そして負の屈折力の第３群の３つのレン
ズ群を有し、これら３つのレンズ群をいずれも物体側へ
一定条件のもとで移動させて広角端から望遠端への変倍
を行った所謂３群ズームレンズを開示している。In this publication, there are three lens groups in order from the object side: a first group with negative refractive power, a second group with positive refractive power, and a third group with negative refractive power. also discloses a so-called three-group zoom lens that is moved toward the object side under certain conditions to change the magnification from the wide-angle end to the telephoto end.
一般にズームレンズにおいて各レンズ群の屈折力を強め
れば所定の変倍比な得る為の各レンズ群の移動量が少な
くなり、レンズ全長の短縮化が可能となる。しかしなが
ら単に各レンズ群の屈折力を強めると変倍に伴う収差変
動が大きくなり、特に高変倍化な図る際には全変倍範囲
にわたり良好なる光学性能を得るのが難しくなってくる
という問題点かある。Generally, in a zoom lens, if the refractive power of each lens group is strengthened, the amount of movement of each lens group to obtain a predetermined variable power ratio will be reduced, and the total length of the lens can be shortened. However, if you simply strengthen the refractive power of each lens group, aberration fluctuations will increase as you change magnification, making it difficult to obtain good optical performance over the entire zoom range, especially when aiming for high variable power. There are some points.
（発明が解決しようとする問題点）
本発明は本出願人の先の特開昭６３−２７１２１４号公
報で提案したズームレンズの屈折力配置を利用し、各レ
ンズ群のレンズ構成を更に改良し、特にレンズ全長の短
縮化を図りつつ変倍比３〜４程度と全変倍範囲にわたり
高い光学性能を有した３群ズームレンズの提供を目的と
する。(Problems to be Solved by the Invention) The present invention utilizes the refractive power arrangement of the zoom lens proposed in Japanese Unexamined Patent Publication No. 63-271214, which was previously proposed by the applicant, and further improves the lens configuration of each lens group. In particular, the object of the present invention is to provide a three-group zoom lens that has a zoom ratio of about 3 to 4 and high optical performance over the entire zoom range while reducing the overall length of the lens.
（問題点を解決するための手段）
本発明に係る３群ズームレンズは、物体側より順に負の
屈折力の第１群、正の屈折力の第２群、そして負の屈折
力の第３群の３つのレンズ群を有し、広角端から望遠端
への変倍を該第１．第２゜第３群をいずれも物体側へ移
動させて行い、該第２．第３群の焦点距離を各々ｆ２．
ｆ３、広角端における全系の焦点距離をｆＷ、広角端に
おける該第１群と第２群の主点間隔及び該第２群と第３
群の主点間隔を各々Ｅ１Ｗ、Ｅ２Ｗとしたとき
１．０ ＜ ｌｆ３／ｆ２｜＜１．４
・・ （１）０．７ ＜ Ｅ１Ｗ／ｆＷ
＜１．５ ・・ （２）０．８３＜ Ｅ２Ｗ／
ｆＷ ＜１． ５０・・（３）なる条件を満足する
ことを特徴としている。(Means for Solving the Problems) A three-group zoom lens according to the present invention includes, in order from the object side, a first group having a negative refractive power, a second group having a positive refractive power, and a third group having a negative refractive power. It has three lens groups, and the first... The second and third groups are both moved toward the object side, and the second and third groups are moved toward the object side. The focal length of the third group is set to f2.
f3, the focal length of the entire system at the wide-angle end is fW, the distance between the principal points of the first group and the second group at the wide-angle end, and the distance between the principal points of the second group and the third group at the wide-angle end;
When the principal point spacing of the group is E1W and E2W, respectively, 1.0 < lf3/f2 | <1.4
... (1) 0.7 < E1W/fW
<1.5... (2) 0.83< E2W/
fW<1. 50...It is characterized by satisfying the condition (3).
（実施例）
第１図から第９図は各々本発明の数値実施例１〜９のレ
ンズ断面図である。(Example) FIGS. 1 to 9 are lens sectional views of numerical examples 1 to 9 of the present invention, respectively.
図中、工は負の屈折力の第１群、ＩＩは正の屈折力の第
２群、■は負の屈折力の第３群、矢印は広角側から望遠
側へ変倍を行う際の各レンズ群の移動方向を示す。In the figure, numeral indicates the first group with negative refractive power, II indicates the second group with positive refractive power, ■ indicates the third group with negative refractive power, and the arrow indicates the point when changing the magnification from the wide-angle side to the telephoto side. The moving direction of each lens group is shown.
本実施例に係るズームレンズは広角端から望遠端へ変倍
を行う際、各図に示すように第１群から第３群をいずれ
も独立に物体側方向に移動させている。このように広角
端から望遠端への変倍の際、第１群を物体側へ移動させ
ることにより広角端でのレンズ全長の短縮化を効果的に
行っている。即ちレンズ全長が広角側で短く、望遠側で
長くなる屈折力配置を採っている。In the zoom lens according to this embodiment, when changing the magnification from the wide-angle end to the telephoto end, the first to third groups are all independently moved in the object side direction, as shown in each figure. In this manner, when changing the magnification from the wide-angle end to the telephoto end, by moving the first group toward the object side, the overall length of the lens at the wide-angle end is effectively shortened. In other words, the lens has a refractive power arrangement in which the overall length of the lens is short on the wide-angle side and long on the telephoto side.
そして前述の屈折力の３つのレンズ群よりズームレンズ
を構成したときのｖＪ２鮮とｖＪ３群の屈折力比とが条
件式（＋）を、又広角端における第１群と第２群との主
点間隔Ｅ１Ｗ、第２群と第３群との主点間隔Ｅ２Ｗが条
件式（２） 、 （３）を満足するように設定している
。When a zoom lens is constructed from the three lens groups with the above-mentioned refractive powers, the refractive power ratio of the vJ2 lens and the vJ3 lens group determines the conditional expression (+), and the main difference between the first group and the second group at the wide-angle end. The point interval E1W and the principal point interval E2W between the second group and the third group are set so as to satisfy conditional expressions (2) and (3).
これにより所定の変倍比な容易に得、かつ全変倍範囲に
わたり光学性能を良好に維持しつつ広角端でのバックフ
ォーカスを短くすると共に広角端でのレンズ全長の大幅
な短縮化を図フている。This makes it possible to easily obtain the desired zoom ratio, maintain good optical performance over the entire zoom range, shorten the back focus at the wide-angle end, and significantly shorten the overall lens length at the wide-angle end. ing.
次に前述の各条件式の技術的意味について説明する。Next, the technical meaning of each of the above conditional expressions will be explained.
条件式（１）は本発明の３群ズームレンズの変倍に寄与
する第２．第３群の焦点距離の比に関するものである。Conditional expression (1) expresses the second lens which contributes to variable power of the three-group zoom lens of the present invention. This relates to the focal length ratio of the third group.
条件式（１）の上限を越えると最も変倍に寄与する第３
群の屈折力が弱くなりすぎ所定の変倍比な得るためには
第３群の移動量を多くしなければならずレンズ系全体が
大型化してくるので適当でない。もしくは第２群の屈折
力が強くなりすぎペッツバール和が正の方向に大きくな
り、特にズーム中間部での像面特性が大きくアンダーに
倒れ適当でない。又条件式（１）の下限を越えると特に
第２群の屈折力が弱くなりすぎ変倍の為に必要な可動部
、即ち第１群との間隔と第３群との間隔を大きく確保す
る必要が生じレンズ系全体が大型化してくるので適当で
ない。When the upper limit of conditional expression (1) is exceeded, the third
This is not appropriate because the refractive power of the group becomes too weak and the amount of movement of the third group must be increased in order to obtain a predetermined variable power ratio, which increases the size of the entire lens system. Alternatively, the refractive power of the second group may become too strong, causing the Petzval sum to increase in the positive direction, and the image surface characteristics, especially at the intermediate zoom position, to be greatly under-slanted, which is not appropriate. Furthermore, if the lower limit of conditional expression (1) is exceeded, the refractive power of the second group in particular becomes too weak, and the movable parts necessary for zooming, that is, the distance from the first group and the distance from the third group, must be ensured. This is not appropriate because the lens system as a whole becomes larger as a result of this necessity.
条件式（２）の上限を越えるとレンズ全長が大きくなり
レンズ系全体のコンパクト化を達成するのが難しくなる
。また下限を越えると変倍比な大きく取るのが難しくな
り適当でない。If the upper limit of conditional expression (2) is exceeded, the total length of the lens increases, making it difficult to make the entire lens system compact. Moreover, if the lower limit is exceeded, it becomes difficult to obtain a large variable power ratio, which is not appropriate.
又条件式（３）は条件式（２） と同様であり、条件式
（３）の上限を越えるとレンズ全長が大きくなりレンズ
系全体のコンパクト化を達成するのが難しくなり、又下
限を越えると変倍比を大きく取るのが漏しくなってくる
。この（２） 、 （３）式は広角端から望遠端にかけ
て第１．第２．第３群が物体側へ移動し、特に望遠端て
各レンズ群間隔が最も狭くなるズームレンズでは高変倍
化及びコンパクト化には必須要件である。Furthermore, conditional expression (3) is the same as conditional expression (2), and if the upper limit of conditional expression (3) is exceeded, the total lens length will increase, making it difficult to achieve compactness of the entire lens system, and if the lower limit is exceeded, This makes it difficult to increase the zoom ratio. These equations (2) and (3) have the first value from the wide-angle end to the telephoto end. Second. In a zoom lens in which the third lens group moves toward the object side, and the distance between each lens group becomes narrowest at the telephoto end, this is an essential requirement for achieving a high zoom ratio and making the lens compact.
本発明において全変倍範囲にわたり特に良好なる光学性
能を得る為には第２群を少なくとも２つの負レンズを有
するように構成するのが良い、このとき第２群を絞りを
挟んで第２１群と第２２群の２つのレンズ群より構成し
、該第２１群と第２２群を少なくとも１枚の負レンズを
有するように構成するのが良い。In the present invention, in order to obtain particularly good optical performance over the entire zoom range, it is preferable to configure the second group to have at least two negative lenses. It is preferable that the lens is composed of two lens groups, ie, a 22nd lens group and a 22nd lens group, and the 21st lens group and the 22nd lens group have at least one negative lens.
このような構成にすることにより第１群を負の屈折力、
第３群を負の屈折力で構成し、第２群も絞りを挟んで２
つの群に分け、更に互いに少なくとも１枚の負レンズを
有するようにし、レンズ系全系を略対称型のレンズ系と
し、これにより全変倍範囲において主に歪曲収差の発生
を少なくしている。With this configuration, the first group has negative refractive power,
The third group has a negative refractive power, and the second group also has a diaphragm in between.
The lenses are divided into two groups, each having at least one negative lens, and the entire lens system is made into a substantially symmetrical lens system, thereby mainly reducing the occurrence of distortion in the entire zoom range.
特に広角側に右いて、たる型の歪曲収差を良好に補正す
るには第２１群の負レンズの少なくとも１つのレンズ面
は物体側に凹面を向は第２２群の負レンズの少なくとも
１つのレンズ面は像面側に凹面を向けるように構成する
のが良い。Particularly on the wide-angle side, in order to satisfactorily correct barrel distortion, at least one lens surface of the negative lens in the 21st group should be concave toward the object side, and at least one lens in the negative lens in the 22nd group should have a concave surface facing the object side. The surface is preferably constructed so that the concave surface faces toward the image plane.
この他、本発明においてはレンズ構成を次の如く設定す
るのが良い。In addition, in the present invention, it is preferable to set the lens configuration as follows.
（イ）第１は第２群中の絞りの径をなるべく小さくする
と共に主に球面収差の補正過剰を良好に補正する為に第
２群中の第２１群を正の屈折力のレンズ群より構成する
のが良い。(b) First, in order to make the diameter of the aperture in the second group as small as possible and to better correct overcorrection of spherical aberration, the 21st group in the second group is made from a lens group with positive refractive power. It is better to configure.
（ロ）第２は変倍に右いて第１群と′！Ｊ２群の主点間
隔Ｅ１及び第２群と第３群の主点間隔Ｅ２を大きくし、
第２群と第３群の変倍の際の移動量を十分長く確保し、
所定の変倍比な容易に得るには第１群の像面側の主点か
ら第２群の最終レンズ面までの間隔なＯＩ 、第１群の
光軸上の長さをＬｌとしたとき
０、６ ＜ｌｏｔ ’／Ｌｌ ｌ＜１．５ ”・（
４）なる条件を満足させるのが良い。(b) The second group is based on variable magnification and is the same as the first group'! Increase the principal point interval E1 of the J2 group and the principal point interval E2 of the second and third groups,
Ensuring a sufficient amount of movement when changing the magnification of the second and third groups,
To easily obtain a predetermined variable power ratio, the distance OI from the principal point on the image side of the first group to the final lens surface of the second group is OI, and when the length on the optical axis of the first group is Ll. 0, 6 <lot '/Ll l<1.5''・(
4) It is better to satisfy the following conditions.
条件式（４）の上限を越えるとレンズ全長が増大し、又
下限を越えると各レンズ群の移動量が制限され、所定の
変倍比な得るのが難しくなってくる。When the upper limit of conditional expression (4) is exceeded, the total lens length increases, and when the lower limit is exceeded, the amount of movement of each lens group is restricted, making it difficult to obtain a predetermined variable power ratio.
（ハ）第３は広角端における第２群の最終レンズ面と第
３群の第ルンズ面までの間隔を８２Ｗとしたとき
３ ＜ Ｅ２Ｗ／Ｂ２Ｗ ＜５ −−−−−−−
（５）とすることである。(c) Third, when the distance between the final lens surface of the second group and the lens surface of the third group at the wide-angle end is 82W, 3 < E2W/B2W <5 ---------
(5).
これにより第３群による変倍効果を十分大きくし、即ち
第３群の変倍に伴う移動量を十分確保している０条件式
（５）の上限を越えると第３群の移動空間が少なくなり
所定の変倍比な確保するのが難しくなりてくる。This makes the magnification change effect of the third group sufficiently large, that is, ensures a sufficient amount of movement associated with the magnification change of the third group.If the upper limit of conditional expression (5) is exceeded, the movement space of the third group becomes small. This makes it difficult to maintain a predetermined variable power ratio.
又、下限を越えると広角端でのレンズ全長が伸びるか若
しくは第３群の主点を物体側へ寄せるために第３群の負
の屈折力を強くしなければならずペッツバール和が負の
方向に大きくなり像面がオーバーぎみとなってくるので
適当でない。Moreover, if the lower limit is exceeded, the total length of the lens at the wide-angle end will increase, or the negative refractive power of the third group must be strengthened in order to move the principal point of the third group toward the object side, and the Petzval sum will become negative. This is not appropriate because it becomes large and the image plane becomes too large.
（ニ）第４は第１群を少なくとも１枚の正レンズ、少な
くとも１枚の負レンズより構成し、このときの任意のレ
ンズの材質の屈折率をｎ、としたとき
１、 ５５＜ ｊ’）、 ＜１． ８
−−− ・・・軸・ （６）を満たすのが望
ましい。この少なくとも１枚の正レンズ及び負レンズの
材質の屈折率差は少ない方が望ましい。この為、任意の
レンズの材質の屈折率は条件式（６）内にあることが望
ましい。上限をはずれると球面収差が補正不足となり、
又下限をはずれると補正過剰となり適当でない。(d) Fourth, the first group is composed of at least one positive lens and at least one negative lens, and when the refractive index of the material of any lens is n, 1, 55 <j' ), <1. 8
−−− Axis・It is desirable to satisfy (6). It is desirable that the difference in refractive index between the materials of the at least one positive lens and the negative lens be as small as possible. For this reason, it is desirable that the refractive index of any lens material falls within conditional expression (6). If the upper limit is exceeded, spherical aberration will be insufficiently corrected,
Further, if the lower limit is exceeded, the correction becomes excessive and is not appropriate.
（ホ）第５は第２群中の第２１群に含まれる正レンズの
材質のアツベ数をν２Ｐとしたときυ２Ｐ ＞ ４
０ ・・・・・・・・・（７）を満た
すのが望ましい。この範囲を逸脱すると、特に望遠側の
軸上色収差がアンダーになり良くない。特に第２１群内
の最も物体側に正レンズを配置し、この正レンズの材質
のアツベ数をν２１Ｐとしたとき
ν２１Ｐ＞ ５５ − ・・・・−
（８）を満たすのが色収差上更に望ましい。(E) Fifth, when the Atsube number of the material of the positive lens included in the 21st group in the 2nd group is ν2P, υ2P > 4
0 It is desirable that (7) is satisfied. Outside this range, the axial chromatic aberration, especially on the telephoto side, will be undervalued, which is not good. In particular, when a positive lens is placed closest to the object in the 21st group, and the Atsube number of the material of this positive lens is ν21P, ν21P> 55 - . . . -
It is more desirable to satisfy (8) in terms of chromatic aberration.
（へ）第６は広角側での下線による内向性のコマ・フレ
アやたる型の歪曲収差を除去するために第１群のいずれ
かのレンズ面に周辺に向うに従って正の屈折力が強くな
る、若しくは負の屈折力が弱くなる形状の非球面を用い
るのが良い。(f) 6th, in order to eliminate inward coma flare and barrel distortion caused by underlining on the wide-angle side, the positive refractive power of any lens surface in the first group becomes stronger as it moves toward the periphery. Alternatively, it is preferable to use an aspheric surface having a shape that weakens negative refractive power.
又、広角端のたる型の歪曲収差を望遠端の上線による内
向性コマを除去するために第３群のいずれかのレンズ面
に周辺に向うに従い正の屈折力が弱くなる、若しくは負
の屈折力が強くなる形状の非球面を用いるのが良い。In addition, in order to eliminate the barrel-shaped distortion at the wide-angle end and the introverted coma caused by the upper line at the telephoto end, any lens surface in the third group has positive refractive power that becomes weaker toward the periphery or negative refraction. It is better to use an aspheric surface with a shape that increases the force.
（ト）第７は広角端から望遠端のズーミングに際して第
２１群と第２２群を別な動きをさせるのがズーミングに
よる収差変動の軽減や更なる高変倍化に好ましい。(G) Seventh, it is preferable to move the 21st and 22nd groups differently during zooming from the wide-angle end to the telephoto end, in order to reduce aberration fluctuations due to zooming and further increase the zoom ratio.
尚、本発明においてフォーカシング（距離合せ）は第１
群で行うのが望ましいが、第３群で行っても良く、又一
部のズーム域のみを或いは一部の物体距離域のみを第３
群で行っても良い。In addition, in the present invention, focusing (distance adjustment) is the first
It is preferable to use the third group, but it is also possible to use the third group, or only a part of the zoom range or a part of the object distance range can be used with the third group.
You can go in groups.
次に本発明の数値実施例を示す。数値実施例においてＲ
ｉは物体側より順に第ｉ番目のレンズ面の曲率半径、Ｄ
ｉは物体側より第ｉ番目のレンズ厚及び空気間隔、Ｎｉ
とνｉは各々物体側より順に第ｉ番目のレンズのガラス
の屈折率とアツベ数である。Next, numerical examples of the present invention will be shown. In numerical examples R
i is the radius of curvature of the i-th lens surface in order from the object side, D
i is the i-th lens thickness and air distance from the object side, Ni
and νi are the refractive index and Abbe number of the glass of the i-th lens, respectively, in order from the object side.
又前述の各条件式と数値実施例に右ける語数値との関係
を表−１に示す。Furthermore, Table 1 shows the relationship between each of the above-mentioned conditional expressions and the word values in the numerical examples.
数値実施例１
Ｆ−３６，２
〜１０１．８５
０Ｉ−−７２，１５
０２−２４，０７
０３−２８，０１
Ｒ４−１６６，５６
１１５−４６，０３
１＋ ６− −５３．８７
ｎ ７− ２２．７５
１１ ８− −２２．７５
１１ ９− ９３．７６
旧０− 絞り
ｒｌ ｌ−４５，８Ｉ
ｎ＋２− ２２．２５
０１３− ６０．：１２
ｎ＋４−−３１．５３
ｎ＋５−２８３．８３
１１６− −２４．２１
Ｒｉ７−−２０．３２
Ｉｔ ８− ６８．９３
０１９− −１８．４５
ＦＮｏ−１：２．９ ２ω・ ６１．７° 〜２
３．９９゜〜６．８
Ｄ Ｉ−１，７０
０２−２，４４
０３−４，１０
０４−ｕＪ変
Ｄ ５− ３．２５
０ ６− ０．２０
０ ７− ５．９７
Ｄ ８− １．９８
０ ９− １．４８
Ｄ Ｏ−３，１０
Ｄ Ｉ−１，２３
Ｄ ２− １．１３
０１３− ３．５０
旧４−可変
ＤＩ５−３．６９
０１６− ２．３３
０１７−１．２０
Ｄ ８−４．４７
０１９−１．５Ｏ
Ｎ Ｉ−１，５９６８０ν ｌ−５５，５Ｎ ２＝
１．６８８９３ ｖ ２−３１．１Ｎ ３−１．
４８７４９ ν ３−７０．２Ｎ ４−１．５８２
６７ ν ４−４６．４Ｎ ５−１．８４６６６
ν ５−２３．９Ｎ ６−１．８３４００ ν
６−３７．２Ｎ ７−１．６８８９３ ｖ ７＝
３１．１Ｎ ８−１．６２００４ ν ８讃３６．
３Ｎ ９−１．７４４００ ν ９−４４．８ＮＩ
Ｏ自１．６２２９９ シ１Ｇ−５８．１Ｒ２０−−３
１，４３
数値実施例２
Ｆ−３６，２２
〜ｌｏｔ 、９４
Ｒ１−−８０，１８
Ｒ２−２４，３６
ｎ ３− ２９．００
８４−１２７．９６
８５−４８゜２５
８６−−６０．５１
Ｒ７−２２，９４
Ｒ８−−２３，５４
８９−１１７，４７
ＲＩＯ−絞り
Ｒ１１−４４，＋９
Ｒ１２−２０，７０
ＦＮｏ＝１＋２．９ ２ω−６１，７°〜２３．９
９゜〜６．８
Ｄ Ｉ−１，７０Ｎ ！−１．６９６８０ ν
ｌ−５５，５０２−２，８８
Ｄ ３− ３．７６ Ｎ ２−１．６８８９
３ ν ２−３１．１Ｄ４−可変
Ｄ ５璽 ２．９８ Ｎ ３−１．５１６３：
］ ν ３細６４．ｌＤ ６−０．２０
Ｄ ７−６．８０ ８４−１．５８２６７ ν ４−４
６．４Ｄ Ｂ−２，０９８５−１，８４６６６ν ５−
２３．９０９−１．５７
０１０−２．６３
Ｄｌｌ−１，２０Ｎ Ｓ−１，８３４００ν ６−３
７．２０１２−１．４２
１１１３− ５０．３７
１４−−３１．９９
旧５− ２４６．８６
１１１６− −２４．２８
Ｒ１７−−２２，３０
１１１８−６９，０７
Ｒ１９−−１６，６０
１１２０−−２８，５０
数値実施例３
Ｆ−３６，２０
〜１３０．５Ｉ
ｎ ＋−−６５，２０
Ｒ２−２８，２９
Ｒ３−３３，＋１
Ｒ４謬 ９４６．７３
Ｒ５−５０，０３
Ｄｌ：ｌ−３，７９
０１４−可変
０１５− ３．７２
０１６＠ ２．０８
Ｄｌ７− １．２０
０１８− ４．９４
０１９− １．５Ｏ
７−１，６４７６９
Ｎ ８−１．６２００４
９−１．７４４０Ｏ
ＮＩＯ雪１．６２２９９
７−３３．８
８−３６．：１
９−４４．８
シｔｏ−５８．１
ＦＮｏ＝１：２．９
〜６．６
１−１．７０ Ｎ
２− ２．５６
３−４．２７ Ｎ
４・可変
５−２．８０ Ｎ
２ω−
６１，７゜
１−１．７７２５０
２０１．７２８２５
３−１．５１６３３
〜２４．０’
１−４９．［ｉ
２誌２８．５
３−８４．１
Ｒ６−−８０，６２
Ｒ７−２９，１９
Ｒ８−−２５，５１
Ｒ９−３９４，０９
ＲＩＧ−絞り
Ｒ１１−５９，０７
ＩＩ２饋 ２６．２２
旧３■ ５２．１６
Ｒ１４−−４１，０７
Ｒ１Ｓ■１１２．６７
ＲｌＢ−−３６，０４
Ｒ１７−−２４，０３
Ｒ１８−３７０，９６
Ｒ１９−−６１，７Ｓ
Ｒ２Ｏ−１１４，８９
Ｄ ６− ０．２０
０ ７− ４．８４
Ｄ ８− ２．１０
Ｄ ９− １．２８
０ＩＧ麿 ５，７０
Ｄｌｌ冒 １．１８
０１２− １．５６
０１３− ３．０２
０１４−可変
Ｄｌ５−３．８：１
０１６−４．７４
０１７−１．２０
０１８−１．５１
０１９麿！、５Ｏ
Ｎ ４冒１．５７１３５ ν ４−５３．ＯＮ ５
−１．８４６６６ ν ５−２３．９Ｎ ６−１．
８３４００ ν
Ｎ ７−１．６９８９５ ν
Ｎ ８−１．５８１４４ ｖ
Ｎ ９−１．８３４００ ジ
ロー３７．２
７−３０．１
８−４０．８
９−３７．２
Ｎ１０−１．６２２９９
シＩｎ−５８．１
数値実施例４
Ｆ−３６，２
〜１０１．８５
ＲＩ−−７２，１６
Ｒ２−２４，９７
ＩＩ ３− ２９．６８
Ｒ４−１３８，５３
Ｒ５−４４，５０
Ｒ６−−５８，２１
１１７＠ ２５．７２
０８虐５６．８５
Ｉｔ ９− ５８．７２
旧０−−２２．５５
１１１１− ８９．４１
旧２− 絞り
ＩＩ３− ３２．１９
１１１４− ２１．４５
ＩＩ５− ４６．５０
１１１６−−３６．１２
ＩＩ７− ４１０．８４
１１１１１−−２８．０１
Ｒ１９−−２１，７０
Ｒ２０−６７，７４
ＦＮｏ−１：２．９
〜６．８
Ｄ Ｉ−１，７０Ｎ
Ｄ ２− ２．９８
Ｄ ３− ３．５５
０４・可変
０５譚 ３．０３
Ｄ ６−０．２０
Ｄ ７−２．７６
Ｄ ８−１．００
Ｄ ９虐 ３，９６
０１０−１．３０
Ｄｌｌ−１，７４
Ｄｌ２−４．２３
０１３−１．２０
０１４−１．２９
０１５−３．１６
Ｄｌ６− 可変
０１７−３．２２
０１８自 ３．２貫
Ｄｌ９−１．２０
０２０− ４．２８
Ｎ１０−１．７４４０Ｏ
２ω■
６１．７’ 〜２４．０’
１−１．６９６８０
１會５５．５
２−１．６８８９３
２■３１．１
３會１．５］６３３
３■６４．１
４−１．５７１３５
４−５３．０
５−１．５８１４４
６−１．８４６６６
５麿４０．８
６−２３．９
７−１．８３４００
７−３７．２
８曽１．６２００４
８曽３６．３
９−１．６４７６９
９酵３３．８
シ１０−４４．８
Ｒ２１■ −１７，９６
Ｒ２２−−２７，３６
数値実施例５
Ｆ諺３６．２
〜１３０．５
Ｒ１誌 −６７，２９
Ｒ２−２５，５１
Ｒ３−２６，３５
Ｒ４−３７９，７６
Ｒ５−５８，０８
Ｒ６−１２７，８７
Ｒ７−２９，４４
Ｒ８−−２２，６７
Ｒ９−１６９，１５
ＲＩＯ−絞り
Ｒ１１−６９，７０
０２１−１，５Ｏ
Ｎｌｌ暉１．６２２９９
６１．７’ 〜１８．８’
ＦＮｏ＝Ｉ：３．６
〜８．Ｉ
Ｄ Ｉ−１，７５Ｎ ト弓、７４４００Ｄ ２−
１．１９
Ｄ ３− ５．１９
Ｄ４・可変
Ｄ ５− ２．３７
Ｄ ６糟 ０．１９
Ｄ ７−５．８９
Ｄ８■２．２４
Ｄ ９−２．１１
ＤＩＧ−６，２８
Ｄｌｌ−１，３３
Ｎ ４−１．５７０９９ １４−５０．８Ｎ ５−
１．８４６６６ ｖ ５−２３．９２ω曽
Ｎ ３露１．５１６３３
Ｎ ６−１．８３４０Ｏ
Ｎ ２−１．５８３４７
シ１１−５８．１
１−４４．８
２−２９．’８
３−６４．１
８−３７．２
１１１２− ２５．１１
１１１３− ４４．０９
１１４− −４０．９Ｉ
ｎ＋５− ２１９．２１
ｎ＋６− −３５．９８
１１７− −２Ｌ５２
０１８− ７６．４６
１１１９厘−２０，４４
Ｒ２０−−４２，５２
数値実施例６
Ｆ−３６，２
〜１３０．５
８ Ｉ−−９２，６５
Ｒ２−２８，４９
０３〜３０．１８
１１ ４−＋０２：１．８２
２− ０．１ｉＯ
３−２，８６
４−可変
５− ２．８０
６− ４．８０
７−１．３０
８讃 ４．６４
９− １．５Ｏ
Ｎ ７−１．６９８９５
Ｎ ８−１．６２００４
Ｎ ９−１．８３４０Ｏ
Ｎ１０−１．６２２９９
７−３０．１
８−３８．３
９−３７．２
シ１０−５８．１
ＦＮｏｓｌ：３．６
〜８．Ｉ
Ｄ ｌ−１，７５Ｎ
Ｄ ２− ２．１０
Ｄ ３− ４．４１ ８
Ｄ４−可変
２ω−６１，７° 〜１８．８゜
１−１．７７２５０ ν ｌ−４９，６２−１，５８
３４７ν ２−２９．８
Ｒ５箇 ４９．５５
Ｒ６−１９３，６０
Ｒ７−２８，８６
８８−−２６，２８
８９−３３３，６８
ＲＩＯ−絞り
Ｒ１＋−７１，２１
８１２−２２，２２
ｎ＋３− ２９．４９
Ｒ目−−４７，５７
Ｒ１５−８８，４７
Ｒ１６−−３６，８６
１７−−３７，０３
８Ｉ８− ５７．４８
ｎ＋９−−１６．５１
Ｒ２０−−３８，２２
Ｄ ５− ２．３７
０ ６− ０．＋９
Ｄ ７− ５．５７
０ ８− １．３７
０ ９− ４．３４
０１０− ６．３２
Ｄｌｌ−１，３３
０１２−０，３７
０１３−２，７８
ｎ＋４−可変
ｎ＋５− ３．０３
０１６− ３．２９
０１７− １．３０
０１８− ４．８０
０１９− １．５Ｏ
Ｎ ３−１．５１６３３ ν
３−６４．１
Ｎ ４−１．５７１３５ ｖ ４−５３．ＯＮ
５＝！、８４６６６ ｖ ５−２３．９Ｎ ６
−１．８３４００ ν
Ｎ ７−１．６８８９３ ν
Ｎ ８−１．５９５５１ ν
Ｎ ９−１．８３４００ ジ
ロー３７．２
７−３１．１
８諺３９．２
９−３７．２
Ｎ１０−１．６２２９９
ｖ １０−５８．１
数値実施例７
Ｆ−３６，１９
〜１３０．５１
１ｔ ＋−−８７，６０
１＋ ２− ２６．４２
Ｒ３−２８，２６
０４−２８７８，９９
Ｉｔ ５− ４０．１９
１１ ６−１１４０．３４
Ｉｔ ７− ２９．７９
Ｒ８−−２７，７４
Ｒ９−−７３７，０２
ＲＩＯ感 絞り
Ｒ１１−７７，１９
１１１２−２４，４８
１１１３−４１，７２
８１４−−４９，３７
ｎ＋５− ３８．９３
８Ｉ６− −４２．８７
１１７−１８５．９８
ｎ＋８− ２７．４６
０１９− −１４．３４
Ｒ２０−−６１，８３
２ω−６１，７° 〜１８．８’
ＦＮＯ−１＋３．６
〜８．Ｉ
Ｄ Ｉ−１，７５Ｎ Ｉ−１，７７２５００２−２
，３５
Ｄ ３− ５．３３
Ｄ４・可変
Ｄ ５−２．７３
Ｄ ６−０．２０
Ｄ ７− ４．８８
Ｄ ８鰺 １．１９
Ｄ ９−７．５４
ＤＩＯ−１，１５
Ｄｌｌ−１，３３
ＤＩ２１０．６７
０１３− ２．５５
ＤＩ４冒可変
０１５−３．５０
ＤＩＯ−０，１０
０１７−１，３０
０１８−５，６２
０１９−１，５Ｏ
Ｎ ４−１．５７１３５ ν ４−５３．０Ｎ１０
Ｊ、６２２９９ ｖ １０ｍ５８．１Ｎ ９ｗ＋、
８３４００ ｖ ９−３７．２Ｎ ７−１．６８
８９３ ν ７−３１．１Ｎ ８−１．５９５５１
ν ８−３９．２Ｎ ６＝１．８３４００ ｖ
６−３７．２Ｎ ５−１．８４６６６ ν ５
−２３．９Ｎ ３−１．５＋６３３ ｖ ３Ｊ４
．ｌＮ ２＝１．５８３４７ ｖ ２−２９．８
ν １−４９．［ｉ
数値実施例８
Ｆ−３６，２０
〜１３０．５２
Ｉｔ Ｉ−−９３，０７
Ｒ２−２４，９９
Ｒ３−２７，３４
Ｒ４−２３５，３４
Ｒ５會 ：１６．３９
Ｒ６−１１４，４２
８７−２９，４１
ｎ ８＠ −２５，９９
Ｒ９−２７９，５２
ＲＩＯ−較り
Ｒ１１會 ５９．１５
８Ｉ２− ２４．４９
８Ｉ３− ５１．４１
ＦＮｏ−１：３．６ ２ω−６１，７° 〜１８
．８’〜８．Ｉ
Ｄ １轍 １．７５ Ｎ ＋−１，７７２５０ν
ｌ−４９，６０２−１，９７
Ｄ ３− ４．９８ Ｎ ２−１．６８８９３
ｖ ２−３１．１Ｄ４−可変
Ｄ ５−２．９４ Ｎ ３−１．５１ｓ３３ν ３−
６４ 、１Ｄ ６曹 ０．２０
Ｄ ７−５．４８ Ｎ ４−１．５８２６７ ｖ ４
−４６．４０８−１．６０ Ｎ ５−１．８４６６６
ｖ ５−２３．９Ｄ ９讃 ５．８２
０１０−１．１５
Ｄｌｌ−１，３３Ｎ ６−１．８３４００ ｖ ６−
３７．２０１２− ０．７６
０１３−２．４５ Ｎ ７璽１．８８８９３ ν ７
−３１．１旧４−−４５．４４
１１＋５霞 ５７．０７
旧６■−３６，０３
旧７層 ３７６．８１
Ｒ１８口 ３５．３２
１９−−１４．６５
ｎ２Ｇ口 −８４，７９
数値実施例９
Ｆ−３１Ｓ、２０
〜１３Ｇ、５
Ｒ１−−７７，３５
Ｒ２−２７，０２
Ｒ３−２９，８０
Ｒ４−１４７８，０５
Ｒ５−３９，１４
Ｒ６−−７９，３２
０１４−可変
Ｄ１５− ３．４３
Ｄ１６− ０．１２
０１７− １．３０
０１８− ５．：１０
０１９− １．５Ｏ
Ｎ ８−１．５９５５１
９層１．８３４００
８１Ｇ−１，６０３１１
８−３９，２
９會３７．２
シ１０−６０．７
Ｒ７−３０，５７
８８−−２７，０６
８９−３５１，１０
ＲＩＯ−絞り
Ｒ１１−７２，１８
Ｒ１２−２５，６８
Ｒ１３−５５，３１
ｎ ４−−４７．７７
ＲＩ５− ９７．８０
１６− −３５．２１
Ｒ７−２１８，０３
Ｒ８−４０，９０
Ｒ１９−−１５，４９
８２０−１０４，２８
ＦＮｏ−１：３４
〜８．１
Ｄ Ｉ−１，７５Ｎ
２曽糎
６１．７’ Ｎ１８．８’
１−１．８０４００
１虐４６．６
Ｄ ２− ２．０２
Ｄ ３會 ５．０４
Ｄ４−可変
Ｄ ５−３．１５
０６−０．２Ｏ
２−１，６９８９５
Ｎ ３−１．５１６３３
ν
２−３０．１
３−６４．１
０７曽 ５．６２
Ｄ ８會 １．６０
Ｄ ９− ６．４２
０１０− １．１４
Ｄｌｌ−１，３３
０１２−０，７０
０１３−２，３２
Ｄ１４−可変
Ｄ１５謬 ３．２１
０１６謬 ０．１８
Ｄ１７− １．３０
０１８− ５．４１
０１９− １．５Ｏ
Ｎ ４−１．５８２６７ ν ４−４６．４Ｎ
５−１．８４６６６ ν ５■２３．９Ｎ ６＝１
．８３４００ ｖ ６−３７．２Ｎ ７ｅ１．６
８Ｊ１９３ ｖ ７−３１．１Ｎ ８ｍ１．５９
５５１ ｖ ８１１３９．２Ｎ ９璽１．８３４０
０ ν ９−３７．２ＮＩＯ−１，６０３＋１ シ
１Ｇ−６０．７（表−１）
（発明の効果）
本発明によれば前述の如く３つのレンズ群の屈折力やレ
ンズ構成を特定することにより、レンズ全系の小型化及
び変倍比３程度と高変倍比な有し、しかも全変倍範囲に
わたり良好なる光学性能を有した３群ズームレンズを達
成することができる。Numerical Example 1 F-36,2 ~101.85 0I--72,15 02-24,07 03-28,01 R4-166,56 115-46,03 1+ 6- -53.87 n 7- 22 .75 11 8- -22.75 11 9- 93.76 Old 0- Aperture rl l-45,8I n+2- 22.25 013- 60. :12 n+4--31.53 n+5-283.83 116--24.21 Ri7--20.32 It 8- 68.93 019--18.45 FNo-1:2.9 2ω・61.7° ~2
3.99゜～6.8 DI-1,70 02-2,44 03-4,10 04-uJ variation D 5- 3.25 0 6- 0.20 0 7- 5.97 D 8- 1 .98 0 9- 1.48 D O-3,10 DI-1,23 D 2- 1.13 013- 3.50 Old 4-variable DI5-3.69 016- 2.33 017-1.20 D 8-4.47 019-1.5O N I-1,59680ν l-55,5N 2=
1.68893 v 2-31.1N 3-1.
48749 ν 3-70.2N 4-1.582
67 ν 4-46.4N 5-1.84666
ν 5-23.9N 6-1.83400 ν
6-37.2N 7-1.68893 v 7=
31.1N 8-1.62004 ν 8 praise 36.
3N 9-1.74400 ν 9-44.8NI
01.62299 1G-58.1R20--3
1,43 Numerical Example 2 F-36,22 ~lot, 94 R1--80,18 R2-24,36 n 3- 29.00 84-127.96 85-48°25 86--60.51 R7 -22,94 R8--23,54 89-117,47 RIO-diaphragm R11-44,+9 R12-20,70 FNo=1+2.9 2ω-61,7°~23.9
9°~6.8 DI-1,70N! -1.69680 ν
l-55,502-2,88 D 3- 3.76 N 2-1.6889
3 ν 2-31.1D4-Variable D 5 Seal 2.98 N 3-1.5163:
] ν 3 fine 64. ID 6-0.20 D 7-6.80 84-1.58267 ν 4-4
6.4D B-2,0985-1,84666ν 5-
23.909-1.57 010-2.63 Dll-1,20N S-1,83400ν 6-3
7.2012-1.42 1113- 50.37 14--31.99 Old 5- 246.86 1116- -24.28 R17--22,30 1118-69,07 R19--16,60 1120-- 28,50 Numerical Example 3 F-36,20 ~130.5I n +--65,20 R2-28,29 R3-33,+1 R4 error 946.73 R5-50,03 Dl:l-3,79 014-Variable 015- 3.72 016@2.08 Dl7- 1.20 018- 4.94 019- 1.5O 7-1,64769 N 8-1.62004 9-1.7440O NIO Snow 1.62299 7 -33.8 8-36. :1 9-44.8 Shito-58.1 FNo=1:2.9 ~6.6 1-1.70 N 2- 2.56 3-4.27 N 4・Variable 5-2.80 N 2ω- 61.7° 1-1.77250 201.72825 3-1.51633 ~24.0' 1-49. [i 2 Magazine 28.5 3-84.1 R6--80,62 R7-29,19 R8--25,51 R9-394,09 RIG-Aperture R11-59,07 II2 26.22 Old 3■ 52.16 R14--41,07 R1S■112.67 RlB--36,04 R17--24,03 R18-370,96 R19--61,7S R2O-114,89 D 6- 0.20 0 7 - 4.84 D 8- 2.10 D 9- 1.28 0IG Maro 5,70 Dll 1.18 012- 1.56 013- 3.02 014-Variable Dl5-3.8:1 016-4. 74 017-1.20 018-1.51 019 Maro! , 5O N 4 1.57135 ν 4-53. ON 5
-1.84666 ν 5-23.9N 6-1.
83400 ν N 7-1.69895 ν N 8-1.58144 v N 9-1.83400 Jiro 37.2 7-30.1 8-40.8 9-37.2 N10-1.62299 SiIn-58 .1 Numerical Example 4 F-36,2 ~101.85 RI--72,16 R2-24,97 II 3- 29.68 R4-138,53 R5-44,50 R6--58,21 117@ 25.72 08 56.85 It 9- 58.72 Old 0--22.55 1111- 89.41 Old 2- Aperture II3- 32.19 1114- 21.45 II5- 46.50 1116--36. 12 II7- 410.84 11111--28.01 R19--21,70 R20-67,74 FNo-1: 2.9 ~ 6.8 DI-1,70N D 2- 2.98 D 3- 3 .55 04/Variable 05 tan 3.03 D 6-0.20 D 7-2.76 D 8-1.00 D 9 3,96 010-1.30 Dll-1,74 Dl2-4.23 013 -1.20 014-1.29 015-3.16 Dl6- Variable 017-3.22 018 Self 3.2 pieces Dl9-1.20 020- 4.28 N10-1.7440O 2ω■ 61.7' ~ 24.0' 1-1.69680 1 meeting 55.5 2-1.68893 2 ■ 31.1 3 meetings 1.5] 633 3 ■ 64.1 4-1.57135 4-53.0 5-1. 58144 6-1.84666 5-40.8 6-23.9 7-1.83400 7-37.2 8-1.62004 8-36.3 9-1.64769 9-10-44 .8 R21■ -17,96 R22--27,36 Numerical example 5 F proverb 36.2 ~130.5 R1 magazine -67,29 R2-25,51 R3-26,35 R4-379,76 R5- 58,08 R6-127,87 R7-29,44 R8--22,67 R9-169,15 RIO-Aperture R11-69,70 021-1,5O Nll 1.62299 61.7' ~18.8 'FNo=I: 3.6 ~ 8. I DI-1,75N bow, 74400D 2-
1.19 D 3- 5.19 D4/Variable D 5- 2.37 D 6 0.19 D 7-5.89 D8■2.24 D 9-2.11 DIG-6, 28 Dll-1, 33 N 4-1.57099 14-50.8N 5-
1.84666 v 5-23.92ω so N 3 dew 1.51633 N 6-1.8340O N 2-1.58347 11-58.1 1-44.8 2-29. '8 3-64.1 8-37.2 1112- 25.11 1113- 44.09 114- -40.9I n+5- 219.21 n+6- -35.98 117- -2L52 018- 76.46 1119 rin -20,44 R20--42,52 Numerical Example 6 F-36,2 to 130.5 8 I--92,65 R2-28,49 03 to 30.18 11 4-+02:1.82 2- 0.1iO 3-2,86 4-Variable 5- 2.80 6- 4.80 7-1.30 8-san 4.64 9- 1.5O N 7-1.69895 N 8-1.62004 N 9 -1.8340O N10-1.62299 7-30.1 8-38.3 9-37.2 10-58.1 FNosl: 3.6 ~8. I D l-1,75N D2-2.10 D3-4.41 8 D4-variable 2ω-61,7° ~18.8°1-1.77250 ν l-49,62-1,58
347ν 2-29.8 R5 pieces 49.55 R6-193,60 R7-28,86 88--26,28 89-333,68 RIO-diaphragm R1+-71,21 812-22,22 n+3- 29.49 R eye--47,57 R15-88,47 R16--36,86 17--37,03 8I8- 57.48 n+9--16.51 R20--38,22 D 5- 2.37 0 6- 0. +9 D 7- 5.57 0 8- 1.37 0 9- 4.34 010- 6.32 Dll-1, 33 012-0, 37 013-2, 78 n+4-variable n+5- 3.03 016- 3 .29 017- 1.30 018- 4.80 019- 1.5O N 3-1.51633 v 3-64.1 N 4-1.57135 v 4-53. ON
5=! , 84666 v 5-23.9N 6
-1.83400 ν N 7-1.68893 ν N 8-1.59551 ν N 9-1.83400 Jiro 37.2 7-31.1 8 Proverbs 39.2 9-37.2 N10-1.62299 v 10-58.1 Numerical Example 7 F-36,19 ~130.51 It +--87,60 1+ 2- 26.42 R3-28,26 04-2878,99 It 5- 40.19 11 6- 1140.34 It 7- 29.79 R8--27,74 R9--737,02 RIO feeling Aperture R11-77,19 1112-24,48 1113-41,72 814--49,37 n+5- 38.93 8I6- -42.87 117-185.98 n+8- 27.46 019- -14.34 R20--61,83 2ω-61,7° ~18.8' FNO-1+3.6 ~8. ID I-1,75N I-1,7725002-2
, 35 D 3- 5.33 D4/Variable D 5-2.73 D 6-0.20 D 7- 4.88 D 8 Mackerel 1.19 D 9-7.54 DIO-1, 15 Dll-1, 33 DI210.67 013-2.55 DI4 variable 015-3.50 DIO-0,10 017-1,30 018-5,62 019-1,5O N 4-1.57135 ν 4-53.0N10
J, 62299 v 10m58.1N 9w+,
83400 v 9-37.2N 7-1.68
893 ν 7-31.1N 8-1.59551
ν 8-39.2N 6=1.83400 v
6-37.2N 5-1.84666 ν 5
-23.9N 3-1.5+633 v 3J4
．． lN2=1.58347 v2-29.8
ν 1-49. [i Numerical Example 8 F-36,20 ~130.52 It I--93,07 R2-24,99 R3-27,34 R4-235,34 R5 meeting: 16.39 R6-114,42 87- 29,41 n 8@ -25,99 R9-279,52 RIO-comparison R11 59.15 8I2- 24.49 8I3- 51.41 FNo-1:3.6 2ω-61,7° ~18
．． 8'~8. I D 1 track 1.75 N +-1,77250ν
l-49,602-1,97 D 3- 4.98 N 2-1.68893
v 2-31.1D4-Variable D 5-2.94 N 3-1.51s33ν 3-
64, 1D 6 Sodium 0.20 D 7-5.48 N 4-1.58267 v 4
-46.408-1.60 N 5-1.84666
v 5-23.9D 9-san 5.82 010-1.15 Dll-1,33N 6-1.83400 v 6-
37.2012- 0.76 013-2.45 N 7 1.88893 ν 7
-31.1 old 4--45.44 11+5 haze 57.07 old 6■-36,03 old 7-layer 376.81 R18 port 35.32 19--14.65 n2G port -84,79 Numerical example 9 F-31S, 20 ~ 13G, 5 R1--77,35 R2-27,02 R3-29,80 R4-1478,05 R5-39,14 R6--79,32 014-Variable D15- 3.43 D16 - 0.12 017- 1.30 018- 5. :10 019- 1.5O N 8-1.59551 9 layers 1.83400 81G-1,60311 8-39,2 9 meetings 37.2 10-60.7 R7-30,57 88--27,06 89-351,10 RIO-Aperture R11-72,18 R12-25,68 R13-55,31 n 4--47.77 RI5- 97.80 16- -35.21 R7-218,03 R8-40, 90 R19--15,49 820-104,28 FNo-1:34 ~8.1 DI-1,75N 2 Sofu 61.7'N18.8' 1-1.80400 1 Mass 46.6 D 2 - 2.02 D 3 meeting 5.04 D4-Variable D 5-3.15 06-0.2O 2-1,69895 N 3-1.51633 ν 2-30.1 3-64.1 07 So 5. 62 D 8 meeting 1.60 D 9- 6.42 010- 1.14 Dll-1,33 012-0,70 013-2,32 D14-variable D15 error 3.21 016 error 0.18 D17- 1. 30 018- 5.41 019- 1.5O N 4-1.58267 ν 4-46.4N
5-1.84666 ν 5■23.9N 6=1
．． 83400 v 6-37.2N 7e1.6
8J193 v 7-31.1N 8m1.59
551 v 81139.2N 9 Seal 1.8340
0 ν 9-37.2NIO-1,603+1 1G-60.7 (Table-1) (Effects of the Invention) According to the present invention, by specifying the refractive powers and lens configurations of the three lens groups as described above, Therefore, it is possible to achieve a three-group zoom lens that has a compact overall lens system, a high zoom ratio of about 3, and has good optical performance over the entire zoom range.
第１図から第９図は各々本発明の数値実施例１〜９のレ
ンズ断面図、第１０図〜第１８図は各々本発明の数値実
施例１〜９の諸収差図である。レンズ断面図において１
． ＩＩ、 ＩＩＩは順に第１群、第２群、第３群、矢
印は広角端から望遠端への変倍における各レンズ群の移
動方向、レンズ断面図に右いて（Ａ）は広角端、（Ｂ）
は望遠端を示す。又収差図において（Ａ） 、 （Ｂ）
、 （Ｃ）は各々広角端、中間、望遠端での収差、ｄ
はｄ線、ｇはｇ線、Ｓ、Ｃは正弦条件、ΔＳはサジタル
像面、ΔＭはメリディオナル像面である。
（’Ａ）
（Ａ）
図
図
（へ）
（Ａ）
勇
図
稟
図
（Ａ）
（Ａ’）
勇
図
第
図
（Ａ）
第
図
巖
（Ａ）
勇
図
止ＪＬ作４＋
第
（Ｂ）
窮
図（Ｃ）
−ｕ、ｑｕ
０．４０ −５，００ ５，００１中面９
又蓋 ブー１収五 歪曲ｑス迩１（勾
、ＥＦｔ４件
−υ、４１ＬＩ υ
、観−コ、υ０５＋００工圭面９又２芝 １
１会、収を 歪！１１１３収メ１（°ｈ）正乞仁
ギにイモ
−０，４００，４０
球面９又２１
正Ｅ千伸
−Ｇ、４０ 、 ０．４０−５，００
５＋００１Ｐ＋、膜長 歪１１１３収Ｌ（％）−υ−
υ υ、ｔ＋υ−υ身υ ０−４ｏ
−’：１．ｏｏ ５．００王車１ｑＲｉ
１ｔ−台、ｑｌを １ＴＩＪ月；Ｚ＊
＜％）正ｆｔ、千件
窮
］７
図（Ｃ）
よト償骨
図
（Ｃ）
」駐ｃｎｉｌ又−Ｌ（％）1 to 9 are lens sectional views of numerical examples 1 to 9 of the present invention, and FIGS. 10 to 18 are aberration diagrams of numerical examples 1 to 9 of the present invention, respectively. 1 in the cross-sectional view of the lens
．． II and III are the first group, second group, and third group in order, and the arrows are the moving directions of each lens group during zooming from the wide-angle end to the telephoto end. B)
indicates the telephoto end. Also, in the aberration diagrams (A) and (B)
, (C) are the aberrations at the wide-angle end, intermediate end, and telephoto end, respectively, and d
is the d-line, g is the g-line, S and C are sine conditions, ΔS is the sagittal image plane, and ΔM is the meridional image plane. ('A) (A) Diagram (to) (A) Yuzuzuzuzuzu (A) (A') Yuzuzuzuzuzuzuzu (A) Diazuzuwao (A) Yuzuzuzu JL work 4+ (B) Kyuzu Figure (C) -u, qu
0.40 -5,00 5,001 Middle surface 9
Matakata Boo 1 collection 5 Distortion qsu 1 (Ko, EFt 4 items - υ, 41LI υ
, Kan-ko, υ05+00 engineering Kei-face 9-point 2-turf 1
1 meeting, distort the income! 1113 convergence 1 (°h) Shobe Jingi ni Imo-0,400,40 Spherical surface 9 prongs 21 Sho E Chishin-G, 40, 0.40-5,00
5+001P+, film length strain 1113 yield L (%) -υ-
υ υ, t+υ−υbodyυ 0−4o
-':1. oo 5.00 royal car 1qRi
1t- unit, ql 1TIJ month; Z*
<%) Positive ft, 1000 cases] 7 Figure (C) Yoto Atonement Figure (C) ” Park cnil Mata-L (%)
Claims (4)
の第２群、そして負の屈折力の第３群の３つのレンズ群
を有し、広角端から望遠端への変倍を該第１、第２、第
３群をいずれも物体側へ移動させて行い、該第２、第３
群の焦点距離を各々ｆ２、ｆ３、広角端における全系の
焦点距離をｆＷ、広角端における該第１群と第２群の主
点間隔及び該第２群と第３群の主点間隔を各々Ｅ１Ｗ、
Ｅ２Ｗとしたとき １．０＜｜ｆ３／ｆ２｜＜１．４ ０．７＜Ｅ１Ｗ／ｆＷ＜１．５ ０．８３＜Ｅ２Ｗ／ｆＷ＜１．５０ なる条件を満足することを特徴とする３群ズームレンズ
。(1) It has three lens groups in order from the object side: the first group with negative refractive power, the second group with positive refractive power, and the third group with negative refractive power. The magnification is changed by moving the first, second and third groups toward the object side, and the second and third groups are moved toward the object side.
The focal lengths of the groups are f2 and f3 respectively, the focal length of the entire system at the wide-angle end is fW, and the distance between the principal points of the first and second groups and the distance between the principal points of the second and third groups at the wide-angle end is Each E1W,
3 characterized by satisfying the following conditions when E2W is 1.0<|f3/f2|<1.4 0.7<E1W/fW<1.5 0.83<E2W/fW<1.50 Group zoom lens.
２つのレンズ群を有し、該第２１群と第２２群は少なく
とも１枚の負レンズを有していることを特徴とする請求
項１記載の３群ズームレンズ。(2) The second group has two lens groups, a 21st group and a 22nd group, with an aperture in between, and the 21st group and the 22nd group have at least one negative lens. A three-group zoom lens according to claim 1.
おり、前記第２２群の負レンズは像面側に凹面を向けて
いることを特徴とする請求項２記載の３群ズームレンズ
。(3) The three-group zoom according to claim 2, wherein the negative lens of the 21st group has a concave surface facing the object side, and the negative lens of the 22nd group has a concave surface facing the image plane side. lens.
徴とする請求項２記載の３群ズームレンズ。(4) The three-group zoom lens according to claim 2, wherein the 21st group has positive refractive power.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1021028A JP2581204B2 (en) | 1989-01-31 | 1989-01-31 | 3-group zoom lens |
| US08/063,041 US5289317A (en) | 1989-01-06 | 1993-05-19 | Compact zoom lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1021028A JP2581204B2 (en) | 1989-01-31 | 1989-01-31 | 3-group zoom lens |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02201410A true JPH02201410A (en) | 1990-08-09 |
| JP2581204B2 JP2581204B2 (en) | 1997-02-12 |
Family
ID=12043543
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1021028A Expired - Fee Related JP2581204B2 (en) | 1989-01-06 | 1989-01-31 | 3-group zoom lens |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2581204B2 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06160715A (en) * | 1992-11-19 | 1994-06-07 | Canon Inc | Miniature zoom lens |
| US5539582A (en) * | 1991-12-09 | 1996-07-23 | Minolta Co., Ltd. | Zoom lens system |
| US5640276A (en) * | 1993-09-03 | 1997-06-17 | Olympus Optical Co., Ltd. | Four-unit zoom lens system having a high zoom ratio |
| US5956185A (en) * | 1997-11-14 | 1999-09-21 | Samsung Aerospace Industries, Ltd. | Compact camera zoom lens system |
| US6061187A (en) * | 1997-08-14 | 2000-05-09 | Samsung Aerospace Industries, Ltd. | Zoom lens system with a high zoom ratio |
| JP2009020324A (en) * | 2007-07-12 | 2009-01-29 | Olympus Imaging Corp | Three-group zoom lens and imaging apparatus using the same |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63271214A (en) * | 1987-04-28 | 1988-11-09 | Canon Inc | Miniature zoom lens |
| JPS6472114A (en) * | 1987-09-11 | 1989-03-17 | Canon Kk | Zoom lens |
| JPH0263007A (en) * | 1988-08-30 | 1990-03-02 | Ricoh Co Ltd | Small-sized zoom lens |
-
1989
- 1989-01-31 JP JP1021028A patent/JP2581204B2/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63271214A (en) * | 1987-04-28 | 1988-11-09 | Canon Inc | Miniature zoom lens |
| JPS6472114A (en) * | 1987-09-11 | 1989-03-17 | Canon Kk | Zoom lens |
| JPH0263007A (en) * | 1988-08-30 | 1990-03-02 | Ricoh Co Ltd | Small-sized zoom lens |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5539582A (en) * | 1991-12-09 | 1996-07-23 | Minolta Co., Ltd. | Zoom lens system |
| JPH06160715A (en) * | 1992-11-19 | 1994-06-07 | Canon Inc | Miniature zoom lens |
| US5640276A (en) * | 1993-09-03 | 1997-06-17 | Olympus Optical Co., Ltd. | Four-unit zoom lens system having a high zoom ratio |
| US6061187A (en) * | 1997-08-14 | 2000-05-09 | Samsung Aerospace Industries, Ltd. | Zoom lens system with a high zoom ratio |
| US5956185A (en) * | 1997-11-14 | 1999-09-21 | Samsung Aerospace Industries, Ltd. | Compact camera zoom lens system |
| JP2009020324A (en) * | 2007-07-12 | 2009-01-29 | Olympus Imaging Corp | Three-group zoom lens and imaging apparatus using the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2581204B2 (en) | 1997-02-12 |
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|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |