JPH07318805A - High variable power zoom lens including wide angle region - Google Patents
High variable power zoom lens including wide angle regionInfo
- Publication number
- JPH07318805A JPH07318805A JP6128078A JP12807894A JPH07318805A JP H07318805 A JPH07318805 A JP H07318805A JP 6128078 A JP6128078 A JP 6128078A JP 12807894 A JP12807894 A JP 12807894A JP H07318805 A JPH07318805 A JP H07318805A
- Authority
- JP
- Japan
- Prior art keywords
- lens
- lens group
- wide
- positive
- zoom
- 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
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
- G02B15/144—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 four groups only
- G02B15/1441—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 four groups only the first group being positive
- G02B15/144113—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 four groups only the first group being positive arranged +-++
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、広角域を含みかつ高変
倍比を持った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 including a wide angle range and having a high zoom ratio.
【０００２】[0002]
【従来の技術】近年ズームレンズの高変倍比が進み、特
開昭６２−１８６２１６号、特開昭６３−７０８１９
号、特開平４−７０７０７号、特開平４−１４９７０２
号、特開平５−１１９２６０号の各公報に記載されたズ
ームレンズのように、変倍比が５以上で特に広角端の半
画角が３８°程度のレンズ系が知られている。2. Description of the Related Art In recent years, the zoom ratio of zoom lenses has advanced, and Japanese Patent Laid-Open Nos. 62-186216 and 63-70819 have been published.
JP-A-4-70707 and JP-A-4-149702
As disclosed in Japanese Patent Laid-Open No. 5-119260 and Japanese Patent Laid-Open No. 5-119260, a lens system having a zoom ratio of 5 or more and a half angle of view at the wide-angle end of about 38 ° is known.
【０００３】これらの従来のズームレンズのうち、特開
昭６２−１８６２１６号、特開昭６３−７０８１９号、
特開平４−１４９４０２号公報のレンズ系は、物体側よ
り順に、正，負，正，正の四つのレンズ群より構成さ
れ、ほとんどすべてのレンズ群を移動させて変倍を行な
うもので変倍比が５である。尚特開昭６２−１８６２１
６号公報は、更に固定の第５レンズ群を有するものであ
る。Among these conventional zoom lenses, JP-A-62-186216, JP-A-63-70819,
The lens system of Japanese Patent Laid-Open No. 4-149402 is composed of four lens groups of positive, negative, positive, and positive in order from the object side. Almost all lens groups are moved to change the magnification. The ratio is 5. Incidentally, JP-A-62-18621
The publication No. 6 has a fixed fifth lens group.
【０００４】また、特開平４−７０７０７号公報のレン
ズ系は、物体側より順に、正，負，正，正，負の五つの
レンズ群より構成され、特開平５−１１９２６０号公報
のレンズ系は、物体側より順に、正，負，正，負，正の
五つのレンズ群より構成され、殆どすべてのレンズ群が
移動するもので変倍比が７程度である。The lens system disclosed in JP-A-4-70707 is composed of five lens groups of positive, negative, positive, positive and negative in order from the object side. Is composed of five lens groups of positive, negative, positive, negative, positive in order from the object side. Almost all the lens groups move, and the zoom ratio is about 7.
【０００５】[0005]
【発明が解決しようとする課題】上記の従来例のうち、
特開昭６２−１８６２１６号、特開昭６３−７０８１９
号、特開平４−１４９４０２号公報のレンズ系のような
ズームタイプのものは、広角端の半画角を３８°程度に
維持したままで変倍比を７程度に大にすると、各レンズ
群の屈折力が強くなりかつレンズ群の移動量が大になり
収差補正が困難になるばかりかレンズ系が大型になりコ
ンパクトになし得なくなる。Among the above-mentioned conventional examples,
JP-A-62-186216, JP-A-63-70819
In the zoom type such as the lens system disclosed in Japanese Patent Laid-Open No. 4-149402, when the zoom ratio is increased to about 7 while maintaining the half angle of view at the wide angle end at about 38 °, each lens group The refracting power of the lens becomes strong and the amount of movement of the lens group becomes large, which makes it difficult to correct aberrations, and also makes the lens system large and compact.
【０００６】また、特開平４−７０７０７号、特開平５
−１１９２６０号公報のレンズ系は、広角端の半画角が
３８°程度に維持したままで変倍比が７程度である。し
かし、特開平４−７０７０７号公報のレンズ系は、第２
レンズ群を移動させてフォーカシングを行なうものであ
る。又特開平５−１１９２６０号公報は、第３、第４、
第５レンズ群を一体に移動させてフォーカシングを行な
うレンズ系の欠点である前玉繰り出しに伴う軸外光のけ
られをなくし、前玉径を小型化しようとしている。しか
し、いずれも前玉径が充分小さくなっているとは言い難
い。Further, JP-A-4-70707 and JP-A-5
The lens system of Japanese Patent Laid-Open No. 119260 has a zoom ratio of about 7 while maintaining the half angle of view at the wide-angle end at about 38 °. However, the lens system disclosed in Japanese Unexamined Patent Publication No. 4-70707 has a second
Focusing is performed by moving the lens group. Further, Japanese Patent Laid-Open No. 5-119260 discloses the third, fourth,
An attempt is made to reduce the diameter of the front lens by eliminating the vignetting of off-axis light associated with the front lens extension, which is a drawback of the lens system in which the fifth lens group is moved integrally for focusing. However, it is hard to say that the diameter of the front lens is small enough.
【０００７】本発明の目的は、広角端の半画角が３８°
（焦点距離２８mm相当）で、変倍比が７程度で、前玉径
が小でコンパクトな結像性能の良好な高変倍ズームレン
ズを提供することにある。An object of the present invention is that the half angle of view at the wide-angle end is 38 °.
An object of the present invention is to provide a highly variable zoom lens having a focal length of 28 mm, a variable power ratio of about 7, a small front lens diameter, a compact size, and good imaging performance.
【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、正の屈折力を有する第１レンズ群
と、負の屈折力を有する第２レンズ群と、正の屈折力を
有する第３レンズ群と、正の屈折力を有する第４レンズ
群と、正の屈折力を有する第５レンズ群とよりなり、各
レンズ群間の間隔を変化させることによって広角端から
望遠端へかけての変倍を行なうレンズ系で、下記条件
（１），（２）を満足することを特徴としている。A zoom lens according to the present invention comprises, in order from the object side, a first lens group having a positive refractive power, a second lens group having a negative refractive power, and a positive refractive power. The third lens group has a fourth lens group having a positive refracting power, and the fifth lens group having a positive refracting power, and the distance between the lens groups is changed to change from the wide-angle end to the telephoto end. A lens system that performs zooming by multiplying is characterized by satisfying the following conditions (1) and (2).
【０００９】（１） ０．２＜ｆw ／ｆ1 ＜０．４ （２） ０．３＜（β2T／β2W）／Ｖ＜０．５ ただし、ｆ1 は第１レンズ群の焦点距離、ｆW は広角端
における全系の焦点距離、β2W，β2Tは夫々広角端，望
遠端における第２レンズ群の近軸横倍率、Ｖはズームレ
ンズの変倍比である。[0009] (1) 0.2 <focus of f w / f 1 <0.4 ( 2) 0.3 <(β 2T / β 2W) / V <0.5 , however, f 1 is the first lens group The distance, f W is the focal length of the entire system at the wide-angle end, β 2W and β 2T are the paraxial lateral magnification of the second lens group at the wide-angle end and the telephoto end, respectively, and V is the zoom ratio of the zoom lens.
【００１０】本発明のズームレンズは、前記のように
正，負，正，正，正の屈折力配分の各レンズ群よりなり
レンズ群の間隔を変えて広角端から望遠端への変倍を行
なうもので、各レンズ群に変倍効果を分担させたもので
ある。これによって各レンズ群の少ない移動量により高
い変倍比を得るようにし、小型にししかも全変倍域内の
各焦点距離において良好な結像性能を有するようにし
た。又、本発明では広角端での半画角３８°（焦点距離
２８mm相当）であるにも拘らず、前玉径が小さくレンズ
系全体が小型になるようにした。そのために本発明で
は、上記の条件（１），（２）を満足するようにした。As described above, the zoom lens of the present invention is composed of each lens group having positive, negative, positive, positive and positive refractive power distributions, and the distance between the wide angle end and the telephoto end is changed by changing the distance between the lens groups. In this case, each lens group shares the variable magnification effect. As a result, a high zoom ratio is obtained with a small amount of movement of each lens unit, and the size is reduced, and good imaging performance is obtained at each focal length within the entire zoom range. Further, in the present invention, the front lens diameter is small and the entire lens system is small in spite of the half angle of view at the wide angle end of 38 ° (equivalent to the focal length of 28 mm). Therefore, in the present invention, the above conditions (1) and (2) are satisfied.
【００１１】条件（１）は、第１レンズ群の焦点距離を
規定するもので、これによって、前玉径が小さくなるよ
うにした。この条件（１）の下限の０．２を越えて第１
レンズ群の焦点距離が大きくなると、レンズ系を高変倍
比にする時第１レンズ群の移動量が大になり前玉径が大
きくならざるを得ない。また上限の０．４を越えて第１
レンズ群の焦点距離が小になると、特に望遠端での球面
収差が大になり、すべての焦点距離に対し良好な結像性
能を維持することが困難になる。The condition (1) defines the focal length of the first lens group, whereby the diameter of the front lens is made small. If the lower limit of 0.2 of this condition (1) is exceeded, the first
When the focal length of the lens group becomes large, the amount of movement of the first lens group becomes large and the diameter of the front lens is inevitably large when the lens system is made to have a high zoom ratio. In addition, exceeding the upper limit of 0.4, the first
When the focal length of the lens group becomes small, spherical aberration becomes large especially at the telephoto end, and it becomes difficult to maintain good imaging performance for all focal lengths.
【００１２】条件（２）は、全系のズーム比（Ｖ）に対
する第２レンズ群の変倍分担率即ち第２レンズ群の望遠
端の近軸横倍率β2Tと広角端の近軸横倍率β2Wとの比
（β2T／β2W）を規定したものである。この条件（２）
の下限の０．３を越えると第２レンズ群以外のレンズ群
の変倍分担率が大きくなるため、各レンズ群の変倍のた
めの移動が大きくなりレンズ系を小型に出来なくなる。
また上限の０．５を越えると第２レンズ群の変倍のため
の移動量が大きくなり諸収差の変動が大になる。特に球
面収差と像面湾曲の変動が大きくなり全焦点距離域で良
好な結像性能を維持することが困難になる。The condition (2) is the variable magnification ratio of the second lens group to the zoom ratio (V) of the entire system, that is, the paraxial lateral magnification β 2T at the telephoto end and the paraxial lateral magnification at the wide-angle end of the second lens group. it is obtained by defining the ratio of the β 2W (β 2T / β 2W ). This condition (2)
If the lower limit of 0.3 is not reached, the variable magnification share of the lens groups other than the second lens group becomes large, so that the movement of each lens group for variable power becomes large and the lens system cannot be made compact.
On the other hand, when the upper limit of 0.5 is exceeded, the amount of movement of the second lens group for zooming becomes large and the variations of various aberrations become large. In particular, spherical aberration and curvature of field vary greatly, making it difficult to maintain good imaging performance over the entire focal length range.
【００１３】上記条件（２）において、下限を０．３５
又上限を０．４５にし下記条件（２’）を満足すれば一
層好ましい。Under the condition (2), the lower limit is 0.35.
It is more preferable to set the upper limit to 0.45 and satisfy the following condition (2 ′).
【００１４】 （２’） ０．３５＜（β2T／β2W）／Ｖ＜０．４５ 又、本発明のズームレンズは、第３レンズ群が次の条件
（３）を満足することが望ましい。(2 ′) 0.35 <(β 2T / β 2W ) / V <0.45 Further, in the zoom lens of the present invention, it is desirable that the third lens group satisfy the following condition (3). .
【００１５】（３） ０．１＜ｆW ／ｆ3 ＜０．６ ただし、ｆ3 は第３レンズ群の焦点距離である。(3) 0.1 <f W / f 3 <0.6 where f 3 is the focal length of the third lens group.
【００１６】この条件（３）は、第３レンズ群の焦点距
離を規定したもので、良好な結像状態を維持しながらレ
ンズ系の全長を短縮するために設けた。この条件（３）
の下限の０．１を越えると広角端における第２レンズ群
と第３レンズ群との間隔が大になり、広角端におけるレ
ンズ系の全長の短縮が困難になる。又、上限の０．６を
越えると第３レンズ群の移動量を小さく出来るが、この
レンズ群での適切な収差の発生量になし得ず全系の収差
を良好に補正出来ず良好な結像性能を維持することが困
難になる。The condition (3) defines the focal length of the third lens group, and is provided to shorten the overall length of the lens system while maintaining a good image formation state. This condition (3)
When the lower limit of 0.1 is exceeded, the distance between the second lens group and the third lens group at the wide-angle end becomes large, and it becomes difficult to shorten the total length of the lens system at the wide-angle end. Further, if the upper limit of 0.6 is exceeded, the amount of movement of the third lens group can be reduced, but an appropriate amount of aberration generated in this lens group cannot be achieved, and aberrations of the entire system cannot be corrected well, resulting in a good result. It becomes difficult to maintain image performance.
【００１７】又、上記条件（３）の上限を０．４８に
し、下記条件（３’）を満足するようにすれば一層好ま
しい。It is more preferable to set the upper limit of the condition (3) to 0.48 so as to satisfy the following condition (3 ').
【００１８】 （３’） ０．１＜ｆW ／ｆ3 ＜０．４８ 本発明のズームレンズは、第２レンズ群により高次の収
差を発生するようにしてすべての焦点距離において収差
を適切に補正し得る。そのためには、第２レンズ群を、
物体側より順に、物体側に凸面を向けた負のメニスカス
レンズと像側により強い曲率をもつ正レンズと両凹レン
ズにて構成することが望ましい。(3 ′) 0.1 <f W / f 3 <0.48 In the zoom lens according to the present invention, the second lens group causes high-order aberrations so that the aberrations are appropriate at all focal lengths. Can be corrected to. For that, the second lens group,
It is preferable that, in order from the object side, a negative meniscus lens having a convex surface directed to the object side, a positive lens having a stronger curvature on the image side, and a biconcave lens are formed.
【００１９】また、本発明は、第３レンズ群に第２レン
ズ群の変倍効果の一部を分担させることによって第２レ
ンズ群で発生する高次の収差の発生量を適正に保ち、第
２レンズ群の製造誤差によって結像性能が低下するのを
少なくしている。そのためには、第３レンズ群を少なく
とも１枚の正レンズにより構成することが望ましい。According to the present invention, the third lens group shares a part of the zooming effect of the second lens group so that the amount of higher-order aberrations generated in the second lens group can be appropriately maintained. The decrease in imaging performance due to the manufacturing error of the two lens groups is reduced. To this end, it is desirable that the third lens group be composed of at least one positive lens.
【００２０】又、本発明のズームレンズにおいて、より
小型にしても全焦点距離域で良好な結像性能を得るため
には、第４レンズ群が、物体側より順に、少なくとも１
枚の正レンズと、１枚の負レンズより構成され、第５レ
ンズ群が、物体側より順に、正レンズと負レンズと正レ
ンズとを有していることが望ましい。Further, in the zoom lens according to the present invention, in order to obtain a good image forming performance in the entire focal length range even if the zoom lens is downsized, the fourth lens group should be arranged in order from the object side to at least 1.
It is preferable that the fifth lens group includes a positive lens and a negative lens, and the fifth lens group has a positive lens, a negative lens, and a positive lens in order from the object side.
【００２１】また第４レンズ群と第５レンズ群の中に少
なくとも１面非球面を用いることにより、全焦点距離域
で発生する球面収差、像面湾曲、コマ収差を良好に補正
することが出来る。Further, by using at least one aspherical surface in the fourth lens group and the fifth lens group, it is possible to excellently correct spherical aberration, field curvature, and coma that occur in the entire focal length range. .
【００２２】[0022]
【実施例】次に本発明のズームレンズの各実施例を示
す。 実施例１ ｆ＝28.4〜75.5〜195.0 ，Ｆ／4.58〜5.20〜5.80 ２ω＝77.7°〜31.3°〜12.4° ｒ1 ＝175.6607 ｄ1 ＝1.200 ｎ1 ＝1.80518 ν1 ＝25.43 ｒ2 ＝67.2251 ｄ2 ＝7.014 ｎ2 ＝1.67000 ν2 ＝57.33 ｒ3 ＝-531.2997 ｄ3 ＝0.200 ｒ4 ＝49.2267 ｄ4 ＝5.168 ｎ3 ＝1.61800 ν3 ＝63.38 ｒ5 ＝133.4508 ｄ5 ＝Ｄ1 （可変） ｒ6 ＝154.3541 ｄ6 ＝1.200 ｎ4 ＝1.83481 ν4 ＝42.72 ｒ7 ＝19.4816 ｄ7 ＝4.828 ｒ8 ＝-73.3792 ｄ8 ＝2.859 ｎ5 ＝1.80518 ν5 ＝25.43 ｒ9 ＝-34.0581 ｄ9 ＝1.200 ｎ6 ＝1.77250 ν6 ＝49.66 ｒ10＝51.5573 ｄ10＝Ｄ2 （可変） ｒ11＝30.4953 ｄ11＝3.767 ｎ7 ＝1.84666 ν7 ＝23.88 ｒ12＝-120.8494 ｄ12＝0.879 ｒ13＝-58.5394 ｄ13＝1.200 ｎ8 ＝1.77250 ν8 ＝49.66 ｒ14＝56.5618 ｄ14＝Ｄ3 （可変） ｒ15＝∞（絞り） ｄ15＝1.000 ｒ16＝27.8471 ｄ16＝3.081 ｎ9 ＝1.61700 ν9 ＝62.79 ｒ17＝-551.3278 ｄ17＝0.200 ｒ18＝36.5776 ｄ18＝3.366 ｎ10＝1.50378 ν10＝66.81 ｒ19＝-61.0916 ｄ19＝1.601 ｒ20＝-25.3332（非球面）ｄ20＝1.200 ｎ11＝1.80518 ν11＝25.43 ｒ21＝-1559.6825 ｄ21＝Ｄ4 （可変） ｒ22＝35.1547 ｄ22＝4.927 ｎ12＝1.66892 ν12＝44.98 ｒ23＝-36.0155 ｄ23＝1.924 ｒ24＝-444.1032(非球面）ｄ24＝1.200 ｎ13＝1.80610 ν13＝40.95 ｒ25＝25.9136 ｄ25＝1.604 ｒ26＝62.3944 ｄ26＝2.891 ｎ14＝1.50378 ν14＝66.81 ｒ27＝-544.1272 ｄ27＝0.200 ｒ28＝36.6642 ｄ28＝4.686 ｎ15＝1.60717 ν15＝40.26 ｒ29＝-55.7986 ｄ29＝0.200 ｒ30＝-64.6074 ｄ30＝1.200 ｎ16＝1.78590 ν16＝44.18 ｒ31＝58.7432 非球面係数 （第２０面）Ｅ＝0.98669 ×10-5，Ｆ＝0.48602 ×10-8 Ｇ＝0.76611 ×10-10 ，Ｈ＝-0.48394×10-12 （第２４面）Ｅ＝-0.31955×10-4，Ｆ＝-0.15058×10-7 Ｇ＝-0.27088×10-9，Ｈ＝0.10346 ×10-11 ｆ 28.4 75.5 195.0 Ｄ1 1.0000 17.4190 38.3045 Ｄ2 2.5350 1.4059 0.5000 Ｄ3 22.6224 10.0532 2.0000 Ｄ4 7.6007 3.9031 1.1837 ｆW ／ｆ1 ＝0.34，（β2T／β2W）／Ｖ＝0.39，ｆW ／
ｆ3 ＝0.29EXAMPLES Next, examples of the zoom lens of the present invention will be shown. Example 1 f = 28.4~75.5~195.0, F / 4.58~5.20~5.80 2ω = 77.7 ° ~31.3 ° ~12.4 ° r 1 = 175.6607 d 1 = 1.200 n 1 = 1.80518 ν 1 = 25.43 r 2 = 67.2251 d 2 = 7.014 n 2 = 1.67000 ν 2 = 57.33 r 3 = -531.2997 d 3 = 0.200 r 4 = 49.2267 d 4 = 5.168 n 3 = 1.61800 ν 3 = 63.38 r 5 = 133.4508 d 5 = D 1 (variable) r 6 = 154.3541 d 6 = 1.200 n 4 = 1.83481 ν 4 = 42.72 r 7 = 19.4816 d 7 = 4.828 r 8 = -73.3792 d 8 = 2.859 n 5 = 1.80518 ν 5 = 25.43 r 9 = -34.0581 d 9 = 1.200 n 6 = 1.77250 ν 6 = 49.66 r 10 = 51.5573 d 10 = D 2 (variable) r 11 = 30.4953 d 11 = 3.767 n 7 = 1.84666 ν 7 = 23.88 r 12 = -120.8 494 d 12 = 0.879 r 13 = -58.5394 d 13 = 1.200 n 8 = 1.77250 ν 8 ＝ 49.66 r 14 ＝ 56.5618 d 14 ＝ D 3 (variable) r 15 ＝ ∞ (aperture) d 15 ＝ 1.000 r 16 ＝ 27.8471 d 16 ＝ 3.081 n 9 ＝ 1.61700 ν 9 ＝ 62.79 r 17 = -551.3278 d 17 = 0.200 18 = 36.5776 d 18 = 3.366 n 10 = 1.50378 ν 10 = 66.81 r 19 = -61.0916 d 19 = 1.601 r 20 = -25.3332 ( aspherical) d 20 = 1.200 n 11 = 1.80518 ν 11 = 25.43 r 21 = -1559.6825 d 21 = D 4 (variable) r 22 = 35.1547 d 22 = 4.927 n 12 = 1.66892 ν 12 = 44.98 r 23 = -36.0155 d 23 = 1.924 r 24 = -444.1032 ( aspherical) d 24 = 1.200 n 13 = 1.80610 v 13 = 40.95 r 25 = 25.9136 d 25 = 1.604 r 26 = 62.3944 d 26 = 2.891 n 14 = 1.50378 v 14 = 66.81 r 27 = -544.1272 d 27 = 0.200 r 28 = 36.6642 d 28 = 4.686 n 15 = 1.60717 v 15 = 40.26 r 29 = -55.7986 d 29 = 0.200 r 30 = -64.6074 d 30 = 1.200 n 16 = 1.785900 ν 16 = 44.18 r 31 = 58.7432 Aspheric surface coefficient (20th surface) E = 0.98669 × 10 -5 , F = 0.48602 × 10 -8 G = 0.76611 × 10 -10 , H = -0.48394 × 10 -12 (24th surface) E = -0.31955 × 10 -4 , F = -0.15058 × 10 -7 G = -0.27088 × 10 -9 , H = 0.10346 x 10 -11 f 28.4 75.5 195 .0 D 1 1.0000 17.4190 38.3045 D 2 2.5350 1.4059 0.5000 D 3 22.6224 10.0532 2.0000 D 4 7.6007 3.9031 1.1837 f W / f 1 = 0.34, (β 2T / β 2W ) /V=0.39, f W /
f 3 = 0.29
【００２３】実施例２ ｆ＝28.9〜75.3〜194.8 ，Ｆ／4.66〜5.18〜5.79 ２ω＝76.9°〜31.1°〜12.3° ｒ1 ＝167.2452 ｄ1 ＝1.189 ｎ1 ＝1.80518 ν1 ＝25.43 ｒ2 ＝67.0032 ｄ2 ＝7.990 ｎ2 ＝1.67000 ν2 ＝57.33 ｒ3 ＝-375.8658 ｄ3 ＝0.185 ｒ4 ＝52.3462 ｄ4 ＝4.986 ｎ3 ＝1.61700 ν3 ＝62.79 ｒ5 ＝142.4121 ｄ5 ＝Ｄ1 （可変） ｒ6 ＝176.5546 ｄ6 ＝1.188 ｎ4 ＝1.83481 ν4 ＝42.72 ｒ7 ＝19.9411 ｄ7 ＝5.914 ｒ8 ＝-78.9215 ｄ8 ＝2.679 ｎ5 ＝1.80518 ν5 ＝25.43 ｒ9 ＝-28.3458 ｄ9 ＝1.194 ｎ6 ＝1.77250 ν6 ＝49.66 ｒ10＝44.0434 ｄ10＝Ｄ2 （可変） ｒ11＝27.8013 ｄ11＝2.996 ｎ7 ＝1.84666 ν7 ＝23.88 ｒ12＝-252.3739 ｄ12＝1.411 ｒ13＝-45.8393 ｄ13＝1.192 ｎ8 ＝1.77250 ν8 ＝49.66 ｒ14＝61.7172 ｄ14＝Ｄ3 （可変） ｒ15＝∞（絞り） ｄ15＝0.991 ｒ16＝26.0338 ｄ16＝3.341 ｎ9 ＝1.61700 ν9 ＝62.79 ｒ17＝193.1279 ｄ17＝0.193 ｒ18＝29.5147 ｄ18＝4.784 ｎ10＝1.51821 ν10＝65.04 ｒ19＝-45.2995 ｄ19＝2.092 ｒ20＝-22.8769（非球面）ｄ20＝1.199 ｎ11＝1.80518 ν11＝25.43 ｒ21＝-412.9550 ｄ21＝Ｄ4 （可変） ｒ22＝30.0748 ｄ22＝5.201 ｎ12＝1.66892 ν12＝44.98 ｒ23＝-32.5407 ｄ23＝0.713 ｒ24＝-300.0002(非球面）ｄ24＝1.200 ｎ13＝1.80610 ν13＝40.95 ｒ25＝26.1487 ｄ25＝1.449 ｒ26＝42.5875 ｄ26＝2.499 ｎ14＝1.48749 ν14＝70.20 ｒ27＝231.3009 ｄ27＝Ｄ5 （可変） ｒ28＝-125.5381 ｄ28＝4.999 ｎ15＝1.62588 ν15＝35.70 ｒ29＝-31.8753 ｄ29＝0.197 ｒ30＝-34.7458 ｄ30＝1.199 ｎ16＝1.77250 ν16＝49.66 ｒ31＝-120.6015 非球面係数 （第２０面）Ｅ＝0.90913 ×10-5，Ｆ＝0.32839 ×10-7 Ｇ＝0.12955 ×10-9，Ｈ＝-0.10587×10-11 （第２４面）Ｅ＝-0.43366×10-4，Ｆ＝-0.59794×10-7 Ｇ＝-0.13459×10-9，Ｈ＝0.11926 ×10-11 ｆ 28.9 75.3 194.8 Ｄ1 0.9846 19.1611 39.5739 Ｄ2 2.4755 1.6926 0.4989 Ｄ3 19.3133 8.8502 1.9883 Ｄ4 5.7036 3.0475 1.5037 Ｄ5 2.1831 29.3665 43.5085 ｆW ／ｆ1 ＝0.35，（β2T／β2W）／Ｖ＝0.43，ｆW ／
ｆ3 ＝0.21Example 2 f = 28.9 to 75.3 to 194.8, F / 4.66 to 5.18 to 5.79 2ω = 76.9 ° to 31.1 ° to 12.3 ° r 1 = 167.2452 d 1 = 1.189 n 1 = 1.80518 ν 1 = 25.43 r 2 = 67.0032 d 2 = 7.990 n 2 = 1.67000 ν 2 = 57.33 r 3 = -375.8658 d 3 = 0.185 r 4 = 52.3462 d 4 = 4.986 n 3 = 1.61700 ν 3 = 62.79 r 5 = 142.4121 d 5 = D 1 ( variable) r 6 = 176.5546 d 6 = 1.188 n 4 = 1.83481 ν 4 = 42.72 r 7 = 19.9411 d 7 = 5.914 r 8 = -78.9215 d 8 = 2.679 n 5 = 1.80518 ν 5 = 25.43 r 9 = -28.3458 d 9 = 1.194 n 6 = 1.77250 ν 6 ＝ 49.66 r 10 ＝ 44.0434 d 10 ＝ D 2 (variable) r 11 ＝ 27.8013 d 11 ＝ 2.996 n 7 ＝ 1.84666 ν 7 ＝ 23.88 r 12 ＝ -252.3739 d 12 ＝ 1.411 r 13 ＝ -45.8393 d 13 = 1.192 n 8 = 1.77250 ν 8 = 49.66 r 14 = 61.7172 d 14 = D 3 ( variable) r 15 = ∞ (stop) d 15 = 0.991 r 16 = 26.0338 d 16 = 3.341 n 9 = 1.61700 ν 9 = 62.79 r 17 = 193.1279 17 = 0.193 r 18 = 29.5147 d 18 = 4.784 n 10 = 1.51821 ν 10 = 65.04 r 19 = -45.2995 d 19 = 2.092 r 20 = -22.8769 ( aspherical) d 20 = 1.199 n 11 = 1.80518 ν 11 = 25.43 r 21 = -412.9550 d 21 = D 4 (variable) r 22 = 30.0748 d 22 = 5.201 n 12 = 1.66892 ν 12 = 44.98 r 23 = -32.5407 d 23 = 0.713 r 24 = -300.0002 (aspherical surface) d 24 = 1.200 n 13 = 1.80610 ν 13 ＝ 40.95 r 25 ＝ 26.1487 d 25 = 1.449 r 26 ＝ 42.5875 d 26 ＝ 2.499 n 14 = 1.48749 ν 14 ＝ 70.20 r 27 ＝ 231.3009 d 27 ＝ D 5 (variable) r 28 ＝ -125.5381 d 28 = 4.999 n 15 = 1.62588 ν 15 = 35.70 r 29 = -31.8753 d 29 = 0.197 r 30 = -34.7458 d 30 = 1.199 n 16 = 1.77250 ν 16 = 49.66 r 31 = -120.6015 Aspheric coefficient (20th surface) E = 0.90913 x 10 -5 , F = 0.32839 x 10 -7 G = 0.12955 x 10 -9 , H = -0.10587 x 10 -11 (24th surface) E = -0.43366 x 10 -4 , F = -0.59794 x 10 -7 G = -0.13 459 × 10 -9 , H = 0.1 1926 × 10 -11 f 28.9 75.3 194.8 D 1 0.9846 19.1611 39.5739 D 2 2.4755 1.6926 0.4989 D 3 19.3133 8.8502 1.9883 D 4 5.7036 3.0475 1.5037 D 5 2.1831 29.3665 43.5085 f W / f 1 = 0.35, (β 2T / β 2W ) / V = 0.43, f W /
f 3 = 0.21
【００２４】実施例３ ｆ＝28.4〜75.7〜195.0 ，Ｆ／4.58〜5.20〜5.80 ２ω＝77.8°〜31.3°〜12.3° ｒ1 ＝160.0128 ｄ1 ＝1.200 ｎ1 ＝1.80518 ν1 ＝25.43 ｒ2 ＝64.5492 ｄ2 ＝8.005 ｎ2 ＝1.67000 ν2 ＝57.33 ｒ3 ＝-743.6510 ｄ3 ＝0.200 ｒ4 ＝48.7940 ｄ4 ＝5.347 ｎ3 ＝1.61800 ν3 ＝63.38 ｒ5 ＝129.5663 ｄ5 ＝Ｄ1 （可変） ｒ6 ＝88.7128 ｄ6 ＝1.200 ｎ4 ＝1.83481 ν4 ＝42.72 ｒ7 ＝16.4406 ｄ7 ＝5.479 ｒ8 ＝-61.8919 ｄ8 ＝2.275 ｎ5 ＝1.80518 ν5 ＝25.43 ｒ9 ＝-44.8936 ｄ9 ＝1.200 ｎ6 ＝1.77250 ν6 ＝49.66 ｒ10＝57.9710 ｄ10＝Ｄ2 （可変） ｒ11＝28.6337 ｄ11＝3.912 ｎ7 ＝1.84666 ν7 ＝23.88 ｒ12＝-78.9313 ｄ12＝1.077 ｒ13＝-36.5065 ｄ13＝1.200 ｎ8 ＝1.77250 ν8 ＝49.66 ｒ14＝74.2473 ｄ14＝Ｄ3 （可変） ｒ15＝∞（絞り） ｄ15＝1.000 ｒ16＝30.9832 ｄ16＝3.402 ｎ9 ＝1.61700 ν9 ＝62.79 ｒ17＝692.0517 ｄ17＝0.200 ｒ18＝25.6822 ｄ18＝4.191 ｎ10＝1.50378 ν10＝66.81 ｒ19＝-89.4953 ｄ19＝1.095 ｒ20＝-45.6000（非球面）ｄ20＝1.200 ｎ11＝1.80518 ν11＝25.43 ｒ21＝77.8061 ｄ21＝Ｄ4 （可変） ｒ22＝33.8933 ｄ22＝4.903 ｎ12＝1.66892 ν12＝44.98 ｒ23＝-32.0996 ｄ23＝0.200 ｒ24＝-102.2992 ｄ24＝1.200 ｎ13＝1.80610 ν13＝40.95 ｒ25＝44.7087 （非球面）ｄ25＝1.576 ｒ26＝220.8443 ｄ26＝3.208 ｎ14＝1.50378 ν14＝66.81 ｒ27＝-47.2653 ｄ27＝Ｄ5 （可変） ｒ28＝-1790.4440 ｄ28＝4.376 ｎ15＝1.60717 ν15＝40.26 ｒ29＝-27.0622 ｄ29＝0.878 ｒ30＝-22.5563 ｄ30＝1.200 ｎ16＝1.78590 ν16＝44.18 ｒ31＝592.8033 非球面係数 （第２０面）Ｅ＝-0.29403×10-5，Ｆ＝-0.19728×10-7 Ｇ＝-0.43173×10-11 ，Ｈ＝-0.19778×10-12 （第２５面）Ｅ＝0.27832 ×10-4，Ｆ＝-0.23951×10-8 Ｇ＝0.53655 ×10-9，Ｈ＝-0.15076×10-11 ｆ 28.4 75.7 195.0 Ｄ1 1.0000 17.6419 40.0888 Ｄ2 3.8738 1.4336 0.6574 Ｄ3 20.2092 9.8337 2.0000 Ｄ4 5.6399 3.0175 1.0000 Ｄ5 1.0000 3.6224 5.6399 ｆW ／ｆ1 ＝0.34，（β2T／β2W）／Ｖ＝0.41，ｆW ／
ｆ3 ＝0.33 ただしｒ1 ，ｒ2 ，・・・ は各レンズ面の曲率半径、ｄ
1 ，ｄ2 ，・・・ は各レンズの肉厚およびレンズ間隔、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 3 f = 28.4 to 75.7 to 195.0, F / 4.58 to 5.20 to 5.80 2ω = 77.8 ° to 31.3 ° to 12.3 ° r 1 = 160.0128 d 1 = 1.200 n 1 = 1.80518 ν 1 = 25.43 r 2 = 64.5492 d 2 = 8.005 n 2 = 1.67000 ν 2 = 57.33 r 3 = -743.6510 d 3 = 0.200 r 4 = 48.7940 d 4 = 5.347 n 3 = 1.61800 ν 3 = 63.38 r 5 = 129.5663 d 5 = D 1 (variable) r 6 = 88.7128 d 6 = 1.200 n 4 = 1.83481 ν 4 = 42.72 r 7 = 16.4406 d 7 = 5.479 r 8 = -61.8919 d 8 = 2.275 n 5 = 1.80518 ν 5 = 25.43 r 9 = -44.8936 d 9 = 1.200 n 6 = 1.77250 ν 6 ＝ 49.66 r 10 ＝ 57.9710 d 10 ＝ D 2 (variable) r 11 ＝ 28.6337 d 11 ＝ 3.912 n 7 ＝ 1.84666 ν 7 ＝ 23.88 r 12 ＝ -78.9313 d 12 ＝ 1.077 r 13 ＝ -36.5065 d 13 = 1.200 n 8 = 1.77250 ν 8 ＝ 49.66 r 14 ＝ 74.2473 d 14 ＝ D 3 (Variable) r 15 ＝ ∞ （Aperture） d 15 ＝ 1.000 r 16 ＝ 30.9832 d 16 ＝ 3.402 n 9 ＝ 1.61700 ν 9 ＝ 62.79 r 17 = 692.0517 d 17 = 0.200 r 18 = 25.6822 d 18 = 4.191 n 10 = 1.50378 ν 10 = 66.81 r 19 = -89.4953 d 19 = 1.095 r 20 = -45.6000 ( aspherical) d 20 = 1.200 n 11 = 1.80518 ν 11 = 25.43 r 21 = 77.8061 d 21 = D 4 (variable) r 22 = 33.8933 d 22 = 4.903 n 12 = 1.66892 ν 12 = 44.98 r 23 = -32.0996 d 23 = 0.200 r 24 -102.2992 d 24 = 1.200 n 13 = 1.80610 ν 13 = 40.95 r 25 = 44.7087 (aspherical surface) d 25 = 1.576 r 26 = 220.8443 d 26 = 3.208 n 14 = 1.50378 ν 14 = 66.81 r 27 = -47.2653 d 27 = D 5 (variable) r 28 = -1790.4440 d 28 = 4.376 n 15 = 1.60717 ν 15 = 40.26 r 29 = -27.0622 d 29 = 0.878 r 30 = -22.5563 d 30 = 1.200 n 16 = 1.78590 ν 16 = 44.18 r 31 = 592.8033 Aspheric surface coefficient (20th surface) E = -0.29403 × 10 -5 , F = -0.19728 × 10 -7 G = -0.43173 × 10 -11 , H = -0.19778 × 10 -12 (25th surface) E = 0.27832 × 10 -4 , F = -0.23951 × 10 -8 G = 0.53655 × 10 -9 , H = -0 .15076 × 10 -11 f 28.4 75.7 195.0 D 1 1.0000 17.6419 40.0888 D 2 3.8738 1.4336 0.6574 D 3 20.2092 9.8337 2.0000 D 4 5.6399 3.0175 1.0000 D 5 1.0000 3.6224 5.6399 f W / f 1 = 0.34, (β 2T / β 2W ) /V=0.41, f W /
f 3 = 0.33 where r 1 , r 2 , ... Are the radius of curvature of each lens surface, d
1 , d 2 , ... Is the thickness of each lens and the lens interval, n
1 , n 2 , ... Is the refractive index of each lens, ν 1 , ν 2 ,.
Is the Abbe number of each lens.
【００２５】実施例１は、図１に示す通りで、正の第１
レンズ群が、物体側より順に、像側に凹の負のメニスカ
スレンズと両凸レンズと像側に凹の正のメニスカスレン
ズからなり、負の第２レンズ群が、物体側より順に、像
側に凹の負のメニスカスレンズと像側に凸の正のメニス
カスレンズと両凹レンズとからなり、正の第３レンズ群
が、物体側より順に、両凸レンズと両凹レンズとからな
り、正の第４レンズ群が、物体側より順に、両凸レンズ
と両凸レンズと像側に凸の負のメニスカスレンズからな
り、正の第５レンズ群が、物体側より順に、両凸レンズ
と両凹レンズと両凸レンズと両凸レンズと両凹レンズと
からなっている。The first embodiment is as shown in FIG.
The lens unit is composed of, in order from the object side, a negative meniscus lens concave to the image side, a biconvex lens, and a positive meniscus lens concave to the image side, and the second lens unit negative in order from the object side to the image side. A negative meniscus lens having a concave surface, a positive meniscus lens having a convex surface on the image side, and a biconcave lens. A positive third lens group includes, in order from the object side, a biconvex lens and a biconcave lens, and a positive fourth lens. The group includes, in order from the object side, a biconvex lens, a biconvex lens, and a negative meniscus lens having a convex surface on the image side, and the positive fifth lens group includes, in order from the object side, a biconvex lens, a biconcave lens, a biconvex lens, and a biconvex lens. And a biconcave lens.
【００２６】更に第４レンズ群の最も物体側のレンズの
物体側の面および第５レンズ群の物体側より２枚目のレ
ンズの物体側の面が非球面である。Further, the object side surface of the most object side lens of the fourth lens group and the object side surface of the second lens from the object side of the fifth lens group are aspherical surfaces.
【００２７】また、第１レンズ群から第５レンズ群まで
のすべてのレンズ群を物体側へ移動させて広角端から望
遠端への変倍を行なっている。Further, all the lens groups from the first lens group to the fifth lens group are moved to the object side to perform zooming from the wide-angle end to the telephoto end.
【００２８】実施例２は、図２に示す構成で、正の第１
群が、物体側より順に、像側に凹の負のメニスカスレン
ズと両凸レンズと像側に凹の正のメニスカスレンズから
なり、負の第２レンズ群が、物体側より順に、像側に凹
の負のメニスカスレンズと像側に凸の正のメニスカスレ
ンズと両凹レンズからなり、正の第３レンズ群が、物体
側より順に、両凸レンズと両凹レンズとからなり、正の
第４レンズ群が、物体側より順に、絞りと像側に凹の正
のメニスカスレンズと両凸レンズと像側に凸の負のメニ
スカスレンズとからなり、正の第５レンズ群が、物体側
より順に、両凸レンズと両凹レンズと像側に凹の正のメ
ニスカスレンズと負の第６レンズ群は物体側より順に、
像側に凸の正のメニスカスレンズと、像側に凸の負のメ
ニスカスレンズとからなっている。The second embodiment has the configuration shown in FIG.
The lens unit is composed of, in order from the object side, a negative meniscus lens concave to the image side, a biconvex lens, and a positive meniscus lens concave to the image side, and the negative second lens unit is concave toward the image side in order from the object side. , A negative meniscus lens, a positive meniscus lens having a convex surface on the image side, and a biconcave lens, a positive third lens group, in order from the object side, a biconvex lens and a biconcave lens, and a positive fourth lens group. , In order from the object side, a stop, a positive meniscus lens concave to the image side, a biconvex lens, and a negative meniscus lens convex to the image side, and the positive fifth lens group is a biconvex lens in order from the object side. The biconcave lens, the positive meniscus lens concave to the image side, and the negative sixth lens group are arranged in order from the object side.
It is composed of a positive meniscus lens having a convex surface on the image side and a negative meniscus lens having a convex surface on the image side.
【００２９】更に、第４レンズ群の最も像側のレンズの
物体側の面および第５レンズ群の物体側より２枚目のレ
ンズの面とが非球面である。Further, the object-side surface of the lens closest to the image side in the fourth lens group and the surface of the second lens from the object side in the fifth lens group are aspherical surfaces.
【００３０】また、第１レンズ群から第５レンズ群のす
べてのレンズを物体側へ移動させることにより広角端か
ら望遠端への変倍を行なっている。又第６レンズ群は像
面に対して固定されている。この第６レンズ群は、パワ
ーレンズにした方が収差補正上望ましい。Further, by moving all the lenses of the first lens group to the fifth lens group to the object side, the magnification change from the wide-angle end to the telephoto end is performed. The sixth lens group is fixed with respect to the image plane. The sixth lens group is preferably a power lens in terms of aberration correction.
【００３１】前記各実施例で用いる非球面の形状は、下
記の式で表わされる。The shape of the aspherical surface used in each of the above embodiments is expressed by the following equation.
【００３２】ｘ＝（１／ｒ）ｈ2 ／［１＋｛１−（ｈ／
ｒ）2 ｝1/2 ］＋Ｅｈ4 ＋Ｆｈ6 ＋Ｇｈ8 ＋Ｈｈ10 ただし、ｘは光軸方向の非球面量、ｈは光軸からの高
さ、ｒは近軸曲率半径、Ｅ，Ｆ，Ｇ，Ｈは非球面係数で
ある。X = (1 / r) h 2 / [1+ {1- (h /
r) 2 } 1/2 ] + Eh 4 + Fh 6 + Gh 8 + Hh 10 where x is the aspheric amount in the optical axis direction, h is the height from the optical axis, r is the paraxial radius of curvature, E, F, G, H is an aspherical surface coefficient.
【００３３】本発明は、特許請求の範囲の各請求項に記
載したレンズ系のほか、次に示す各項に示すズームレン
ズもその目的を達成する発明である。The present invention is an invention which achieves its object not only by the lens system described in each of the claims but also by the zoom lens shown in each of the following items.
【００３４】（１）特許請求の範囲の請求項１に記載さ
れているレンズ系で、前記第２レズ群が、物体側より順
に、物体側に凸面を向けた負のメニスカスレンズと像側
の面がより強い曲率を持つ正レンズと両凹レンズとから
なっている広角域を含む高変倍ズームレンズ。(1) In the lens system described in claim 1, the second lens group has, in order from the object side, a negative meniscus lens having a convex surface directed toward the object side and an image side. A high-magnification zoom lens that includes a wide-angle range consisting of a positive lens with a stronger curvature and a biconcave lens.
【００３５】（２）特許請求の範囲の請求項１に記載さ
れているレンズ系で、第３レンズ群が、少なくとも１枚
の正レンズにより構成されている広角域を含む高変倍ズ
ームレンズ。(2) A high-zoom zoom lens system including a wide-angle range in which the third lens group is composed of at least one positive lens in the lens system described in claim 1.
【００３６】（３）特許請求の範囲の請求項１に記載さ
れているレンズ系で、第４レンズ群が物体側より順に、
少なくとも１枚の正レンズと１枚の負レンズとより構成
され、第５レンズ群が、物体側より順に、正レンズと負
レンズと正レンズとよりなる広角域を含む高変倍ズーム
レンズ。(3) In the lens system according to claim 1 of the claims, the fourth lens group is arranged in order from the object side.
A high-zoom zoom lens that includes at least one positive lens and one negative lens, and has a fifth lens group that includes, in order from the object side, a wide-angle range including a positive lens, a negative lens, and a positive lens.
【００３７】（４）特許請求の範囲の請求項１に記載さ
れているレンズ系で、第４レンズ群，第５レンズ群の中
に少なくとも１面の非球面を使用した広角域を含む高変
倍ズームレンズ。(4) In the lens system according to claim 1 of the present invention, a high variable range including a wide angle range in which at least one aspherical surface is used in the fourth lens group and the fifth lens group. Double zoom lens.
【００３８】（５）特許請求の範囲の請求項３に記載さ
れているレンズ系で、第６レンズ群が像面に対して固定
されている広角域を含む高変倍ズームレンズ。(5) A high-magnification zoom lens including a wide-angle range in which the sixth lens unit is fixed to the image surface, in the lens system according to claim 3 of the present invention.
【００３９】（６）前記の（５）の項に記載されている
レンズ系で、第６レンズ群がほぼパワーレスのレンズで
ある広角域を含む高変倍ズームレンズ。(6) In the lens system described in the item (5), a high zoom lens including a wide angle range, in which the sixth lens group is a lens having almost no power.
【００４０】（７）特許請求の範囲の請求項３に記載さ
れたレンズ系で、第６レンズ群が負の屈折力を持つこと
を特徴とする広角域を含む高変倍ズームレンズ。(7) A high zoom lens including a wide angle range, characterized in that the sixth lens group has a negative refracting power in the lens system according to claim 3 of the present invention.
【００４１】（８）特許請求の範囲の請求項３に記載さ
れたレンズ系で、第２レンズ群が、物体側から順に、物
体側に凸面を向けた負のメニスカスレンズと像側の面が
より強い曲率を有する正レンズと両凹レンズとより構成
されていることを特徴とする広角域を含む高変倍ズーム
レンズ。(8) In the lens system according to claim 3 of the present invention, the second lens group has, in order from the object side, a negative meniscus lens having a convex surface directed toward the object side and an image side surface. A high-zoom zoom lens including a wide-angle range, which is composed of a positive lens having a stronger curvature and a biconcave lens.
【００４２】（９）特許請求の範囲の第３項に記載され
ているレンズ系で、第３レンズ群が少なくとも１枚の正
レンズにより構成されていることを特徴とする広角域を
含む高変倍ズームレンズ。(9) In the lens system described in claim 3, the third lens group is composed of at least one positive lens. Double zoom lens.
【００４３】（１０）特許請求の範囲の第３項に記載さ
れているレンズ系で、第４レンズが物体側より順に、少
なくとも１枚の正レンズと１枚の負レンズとより構成さ
れ、第５レンズ群が、物体側より順に、正レンズと負レ
ンズと正レンズとを有していることを特徴とする広角域
を含む高変倍ズームレンズ。(10) In the lens system recited in claim 3, the fourth lens comprises, in order from the object side, at least one positive lens and one negative lens. A high-zoom zoom lens including a wide-angle range, characterized in that five lens groups have a positive lens, a negative lens, and a positive lens in order from the object side.
【００４４】（１１）特許請求の範囲の請求項３に記載
されているレンズ系で、第４レンズと第５レンズ群中に
少なくとも１面の非球面を使用したことを特徴とする広
角域を含む高変倍ズームレンズ。(11) In the lens system according to claim 3 of the invention, at least one aspherical surface is used in the fourth lens group and the fifth lens group, and a wide angle range is provided. High magnification zoom lens including.
【００４５】（１２）特許請求の範囲の請求項１に記載
されているレンズ系で、条件（２）の上限が０．４５で
ある広角域を含む高変倍ズームレンズ。(12) A high-magnification zoom lens including a wide-angle range in which the upper limit of the condition (2) is 0.45, which is the lens system described in claim 1.
【００４６】（１３）特許請求の範囲の請求項１に記載
されているレンズ系で条件（２）の下限が０．３５であ
る広角域を含む高変倍ズームレンズ。(13) A high-zoom zoom lens system including the wide-angle range in which the lower limit of condition (2) is 0.35 in the lens system described in claim 1.
【００４７】（１４）特許請求の範囲の請求項１に記載
されているレンズ系で条件（２）の上限が０．４５又下
限が０．３５である広角域を含む高変倍ズームレンズ。(14) A high-zoom zoom lens system including a wide-angle range in which the upper limit of condition (2) is 0.45 and the lower limit is 0.35 in the lens system described in claim 1.
【００４８】（１５）特許請求の範囲の請求項１に記載
されているレンズ系で、下記条件（３’）を満足する広
角域を含む高変倍ズームレンズ。(15) A high zoom lens including a wide angle range, which satisfies the following condition (3 '), according to the lens system described in claim 1.
【００４９】 （３’） ０．１＜ｆW ／ｆ3 ＜０．４８(3 ′) 0.1 <f W / f 3 <0.48
【００５０】[0050]
【発明の効果】本発明のズームレンズは、全焦点距離域
で良好な結像性能を維持しながら小型で広角域を含む高
変倍なレンズ系である。The zoom lens of the present invention is a compact and highly variable lens system including a wide angle range while maintaining good image forming performance in the entire focal length range.
【図１】本発明の実施例１の断面図FIG. 1 is a sectional view of a first embodiment of the present invention.
【図２】本発明の実施例２の断面図FIG. 2 is a sectional view of a second embodiment of the present invention.
【図３】本発明の実施例３の断面図FIG. 3 is a sectional view of a third embodiment of the present invention.
【図４】本発明の実施例１の広角端における収差曲線図FIG. 4 is an aberration curve diagram at the wide-angle end according to the first embodiment of the present invention.
【図５】本発明の実施例１の中間焦点距離における収差
曲線図FIG. 5 is an aberration curve diagram at an intermediate focal length according to the first embodiment of the present invention.
【図６】本発明の実施例１の望遠端における収差曲線図FIG. 6 is an aberration curve diagram of Example 1 of the present invention at the telephoto end.
【図７】本発明の実施例２の広角端における収差曲線図FIG. 7 is an aberration curve diagram at the wide-angle end according to Example 2 of the present invention.
【図８】本発明の実施例２の中間焦点距離における収差
曲線図FIG. 8 is an aberration curve diagram at an intermediate focal length of Example 2 of the present invention.
【図９】本発明の実施例２の望遠端における収差曲線図FIG. 9 is an aberration curve diagram for Example 2 of the present invention at the telephoto end.
【図１０】本発明の実施例３の広角端における収差曲線
図FIG. 10 is an aberration curve diagram at the wide-angle end according to Example 3 of the present invention.
【図１１】本発明の実施例３の中間焦点距離における収
差曲線図FIG. 11 is an aberration curve diagram for Example 3 of the present invention at an intermediate focal length.
【図１２】本発明の実施例３の望遠端における収差曲線
図FIG. 12 is an aberration curve diagram for Example 3 of the present invention at the telephoto end.
Claims (4)
レンズ群と、負の屈折力を有する第２レンズ群と、正の
屈折力を有する第３レンズ群と、正の屈折力を有する第
５レンズ群とを有し、各レンズ群間の間隔を変えて広角
端から望遠端への変倍を行うレンズ系で、下記の条件
（１），（２）を満足する広角域を含む高変倍ズームレ
ンズ。 （１） ０．２＜ｆw ／ｆ1 ＜０．４ （２） ０．３＜（β2T／β2W）／Ｖ＜０．５ ただし、ｆW は広角端における全系の焦点距離、ｆ1 は
第１レンズ群の焦点距離、β2Wは広角端における第２レ
ンズ群の近軸横倍率、β2Tは望遠端における第２レンズ
群の近軸横倍率、Ｖはズームレンズ全系のズーム比であ
る。1. A first lens element having a positive refractive power in order from the object side.
A lens group, a second lens group having a negative refracting power, a third lens group having a positive refracting power, and a fifth lens group having a positive refracting power are provided, and an interval between the lens groups is This is a lens system that performs zooming from the wide-angle end to the telephoto end by changing it, and is a high-magnification zoom lens including a wide-angle range that satisfies the following conditions (1) and (2). (1) 0.2 <f w / f 1 <0.4 (2) 0.3 <(β 2T / β 2W) / V <0.5 , however, f W is the focal length of the entire system at the wide angle end, f 1 is the focal length of the first lens group, β 2W is the paraxial lateral magnification of the second lens group at the wide-angle end, β 2T is the paraxial lateral magnification of the second lens group at the telephoto end, and V is the zoom lens total system. The zoom ratio.
足する請求項１の広角域を含む高変倍ズームレンズ。 （１） ０．２＜ｆw ／ｆ1 ＜０．４ （２’） ０．３５＜（β2T／β2W）／Ｖ＜０．４５ （３） ０．１＜ｆW ／ｆ3 ＜０．６ ただし、ｆ3 は第３レンズ群の焦点距離である。2. A high variable power zoom lens including a wide angle range according to claim 1, which satisfies the following conditions (1), (2 ') and (3). (1) 0.2 <f w / f 1 <0.4 (2 ') 0.35 <(β 2T / β 2W) / V <0.45 (3) 0.1 <f W / f 3 < 0.6 where f 3 is the focal length of the third lens group.
レンズ群と、負の屈折力を有する第２レンズ群と、正の
屈折力を有する第３レンズ群と、正の屈折力を有する第
４レンズ群と、正の屈折力を有する第５レンズ群と、第
６レンズ群とより構成され、各レンズ群間の間隔を変え
て広角端から望遠端への変倍を行なうレンズ系で、下記
の条件（１），（２）を満足する広角域を含む高変倍ズ
ームレンズ。 （１） ０．２＜ｆw ／ｆ1 ＜０．４ （２） ０．３＜（β2T／β2W）／Ｖ＜０．５ ただし、ｆW は広角端における全系の焦点距離、ｆ1 は
第１レンズ群の焦点距離、β2Wは広角端における第２レ
ンズ群の近軸横倍率、β2Tは望遠端における第２レンズ
群の近軸横倍率、Ｖはズームレンズ全系のズーム比であ
る。3. A first lens element having a positive refractive power in order from the object side.
A lens group, a second lens group having a negative refractive power, a third lens group having a positive refractive power, a fourth lens group having a positive refractive power, and a fifth lens group having a positive refractive power. And a sixth lens group, which changes the distance between the lens groups to perform zooming from the wide-angle end to the telephoto end, in a wide-angle range that satisfies the following conditions (1) and (2): High magnification zoom lens including. (1) 0.2 <f w / f 1 <0.4 (2) 0.3 <(β 2T / β 2W) / V <0.5 , however, f W is the focal length of the entire system at the wide angle end, f 1 is the focal length of the first lens group, β 2W is the paraxial lateral magnification of the second lens group at the wide-angle end, β 2T is the paraxial lateral magnification of the second lens group at the telephoto end, and V is the zoom lens total system. The zoom ratio.
求項３の広角域を含む高変倍ズームレンズ。 （１） ０．２＜ｆw ／ｆ1 ＜０．４ （２’） ０．３５＜（β2T／β2W）／Ｖ＜０．４５ （３） ０．１＜ｆW ／ｆ3 ＜０．６ ただし、ｆ3 は第３レンズ群の焦点距離である。4. A high variable power zoom lens including a wide angle range according to claim 3, wherein the following condition is satisfied. (1) 0.2 <f w / f 1 <0.4 (2 ') 0.35 <(β 2T / β 2W) / V <0.45 (3) 0.1 <f W / f 3 < 0.6 where f 3 is the focal length of the third lens group.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12807894A JP3486457B2 (en) | 1994-05-19 | 1994-05-19 | High magnification zoom lens including wide angle range |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12807894A JP3486457B2 (en) | 1994-05-19 | 1994-05-19 | High magnification zoom lens including wide angle range |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07318805A true JPH07318805A (en) | 1995-12-08 |
| JP3486457B2 JP3486457B2 (en) | 2004-01-13 |
Family
ID=14975886
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12807894A Expired - Fee Related JP3486457B2 (en) | 1994-05-19 | 1994-05-19 | High magnification zoom lens including wide angle range |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3486457B2 (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002098893A (en) * | 2000-09-26 | 2002-04-05 | Minolta Co Ltd | Imaging lens device |
| JP2005345714A (en) * | 2004-06-02 | 2005-12-15 | Konica Minolta Photo Imaging Inc | Imaging apparatus |
| JP2006106091A (en) * | 2004-09-30 | 2006-04-20 | Nikon Corp | Zoom lens |
| WO2006095544A1 (en) | 2005-03-11 | 2006-09-14 | Sony Corporation | Zoom lens and imaging device |
| CN100338495C (en) * | 2001-12-12 | 2007-09-19 | 株式会社尼康 | Zoom lens systems |
| JP2007304195A (en) * | 2006-05-09 | 2007-11-22 | Sony Corp | Zoom lens and imaging device |
| US7492525B2 (en) | 2001-10-30 | 2009-02-17 | Ricoh Company, Ltd. | Zoom lens, camera apparatus and portable information terminal apparatus |
| JP2011013536A (en) * | 2009-07-03 | 2011-01-20 | Tamron Co Ltd | Zoom lens |
| JP2015210384A (en) * | 2014-04-25 | 2015-11-24 | 株式会社ニコン | Variable power optical system, optical device, and method of manufacturing variable power optical system |
| JP2016224157A (en) * | 2015-05-28 | 2016-12-28 | キヤノン株式会社 | Zoom lens and optical device having the same |
| JP2018036364A (en) * | 2016-08-30 | 2018-03-08 | キヤノン株式会社 | Zoom lens and imaging device having the same |
| US10451858B2 (en) | 2014-04-21 | 2019-10-22 | Nikon Corporation | Zoom optical system, optical device and method for manufacturing the zoom optical system |
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1994
- 1994-05-19 JP JP12807894A patent/JP3486457B2/en not_active Expired - Fee Related
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002098893A (en) * | 2000-09-26 | 2002-04-05 | Minolta Co Ltd | Imaging lens device |
| US7492525B2 (en) | 2001-10-30 | 2009-02-17 | Ricoh Company, Ltd. | Zoom lens, camera apparatus and portable information terminal apparatus |
| CN100338495C (en) * | 2001-12-12 | 2007-09-19 | 株式会社尼康 | Zoom lens systems |
| JP2005345714A (en) * | 2004-06-02 | 2005-12-15 | Konica Minolta Photo Imaging Inc | Imaging apparatus |
| JP2006106091A (en) * | 2004-09-30 | 2006-04-20 | Nikon Corp | Zoom lens |
| WO2006095544A1 (en) | 2005-03-11 | 2006-09-14 | Sony Corporation | Zoom lens and imaging device |
| US7649693B2 (en) | 2005-03-11 | 2010-01-19 | Sony Corporation | Zoom lens and image pick-up apparatus |
| JP2007304195A (en) * | 2006-05-09 | 2007-11-22 | Sony Corp | Zoom lens and imaging device |
| JP2011013536A (en) * | 2009-07-03 | 2011-01-20 | Tamron Co Ltd | Zoom lens |
| US10451858B2 (en) | 2014-04-21 | 2019-10-22 | Nikon Corporation | Zoom optical system, optical device and method for manufacturing the zoom optical system |
| US11385446B2 (en) | 2014-04-21 | 2022-07-12 | Nikon Corporation | Zoom optical system, optical device and method for manufacturing the zoom optical system |
| JP2015210384A (en) * | 2014-04-25 | 2015-11-24 | 株式会社ニコン | Variable power optical system, optical device, and method of manufacturing variable power optical system |
| JP2016224157A (en) * | 2015-05-28 | 2016-12-28 | キヤノン株式会社 | Zoom lens and optical device having the same |
| JP2018036364A (en) * | 2016-08-30 | 2018-03-08 | キヤノン株式会社 | Zoom lens and imaging device having the same |
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| Publication number | Publication date |
|---|---|
| JP3486457B2 (en) | 2004-01-13 |
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