JPH0446310A - Compact zoom lens - Google Patents
Compact zoom lensInfo
- Publication number
- JPH0446310A JPH0446310A JP15642290A JP15642290A JPH0446310A JP H0446310 A JPH0446310 A JP H0446310A JP 15642290 A JP15642290 A JP 15642290A JP 15642290 A JP15642290 A JP 15642290A JP H0446310 A JPH0446310 A JP H0446310A
- Authority
- JP
- Japan
- Prior art keywords
- lens
- aspherical
- group
- object side
- conditional expression
- 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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- 238000010276 construction Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
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Abstract
Description
【発明の詳細な説明】
の
本発明は、コンパクトなズームレンズに関するものであ
り、更に詳しくは一眼レフカメラ等に用いるズームレン
ズに関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a compact zoom lens, and more particularly to a zoom lens used in a single-lens reflex camera or the like.
吏東図1丘
現在、−眼レフカメラ用ズームレンズとしては、50m
mのレンズに代わってズーム比2倍程度のレンズが主流
になっている。従って、−眼レフカメラのコンパクト化
、低コスト化を達成するためにこの種のレンズのコンパ
クト化、低コスト化が要望されている。ズーミングに際
するレンズの移動量も含め、レンズ系をコンパクト化す
るには、各レンズ群の屈折力を強くする必要があるが、
性能を維持しながら屈折力を強くしていくのはレンズ枚
数を増加させる方向であるといえる。一方、低コスト化
のためにはレンズ枚数を削減するのが効果的である。こ
のように、レンズ系のコンパクト化と低コスト化には相
反する要素が多分に含まれているのである。Currently, the zoom lens for eye reflex cameras is 50m.
Lenses with a zoom ratio of about 2x have become mainstream in place of M lenses. Therefore, in order to make an eye reflex camera more compact and lower in cost, it is desired that this type of lens be made more compact and lower in cost. In order to make the lens system more compact, including the amount of lens movement during zooming, it is necessary to increase the refractive power of each lens group.
It can be said that increasing the number of lenses is the way to increase the refractive power while maintaining performance. On the other hand, in order to reduce costs, it is effective to reduce the number of lenses. In this way, there are many conflicting elements involved in making a lens system more compact and lowering its cost.
尚、コンパクト化のみを狙ったものとして、例えば特開
昭61−183613号がある。特開昭61−1836
13号で提案されているズームレンズでは、負正の可動
2成分の後方に固定の第3レンズ群が設けられており、
非球面は3面以上用いられている。Note that, for example, Japanese Patent Application Laid-open No. 183613/1986 is an example of a device aiming only at compactness. Japanese Patent Publication No. 1836-1983
In the zoom lens proposed in No. 13, a fixed third lens group is provided behind the two movable negative and positive components.
Three or more aspheric surfaces are used.
が ゛と る
しかしながら、このズームレンズにおいては、3つのレ
ンズ群で構成されているため低コスト化が達成されてい
るとはいえない。However, since this zoom lens is composed of three lens groups, it cannot be said that cost reduction has been achieved.
そこで、最近のプラスチック成形やガラスモールド等の
著しい技術進歩によって非球面が安価に生産されつるよ
うになってきている状況に鑑み、本発明では非球面を効
果的に多用して高い光学性能を維持しながら、レンズ枚
数が少なく低コスト、且つコンパクトなズームレンズを
提供することを目的とする。Therefore, in view of the fact that aspherical surfaces have become cheaper to produce and more durable due to recent remarkable technological advances in plastic molding, glass molding, etc., the present invention effectively utilizes aspherical surfaces to maintain high optical performance. However, it is an object of the present invention to provide a compact zoom lens that has a small number of lenses, is low in cost, and is compact.
ための
上記目的を達成するため、本発明のズームレンズは、物
体側より順に負の屈折力を有する前群と正の屈折力を有
する後群とから成り、前群と後群との間の空気間隔を変
化させることによって全系の焦点距離を変化させるズー
ムレンズにおいて、全系中に非球面を3面以上有するこ
とを特徴としている。In order to achieve the above object, the zoom lens of the present invention consists of a front group having a negative refractive power and a rear group having a positive refractive power in order from the object side. A zoom lens that changes the focal length of the entire system by changing the air spacing is characterized by having three or more aspheric surfaces in the entire system.
前述の如く、一般にズームレンズにおいて低コスト化(
レンズ枚数の削減)及びコンパクト化(移動量、全長の
短縮)を図るためには、各群の屈折力を強くすることが
効果的である。しかし、それによって諸収差が悪化し、
性能の低下を招いてしまうことになる。As mentioned above, cost reduction (
In order to achieve compactness (reduction in the number of lenses) and compactness (reduction in the amount of movement and overall length), it is effective to increase the refractive power of each group. However, this worsens various aberrations,
This will lead to a decrease in performance.
このような性能の低下は、非球面を多用することによっ
て抑えることが可能であり、本発明においては上記のよ
うに全系中に3面以上の非球面を用いることによって、
レンズのコンパクト化及び低コスト化を図りつつ、性能
の維持を可能にしている。例えば、後群中量も物体側の
レンズに非球面を用いた場合、球面収差を補正するのに
効果があり、最も像側のレンズに非球面を用いた場合、
画面周辺部でのコマ収差を補正するのに効果がある。一
方、前群中量も物体側のレンズに非球面を用いた場合、
広角端付近での歪曲収差及び像面湾曲の補正に効果があ
る。このように、効果的に非球面を多用することにより
、性能を維持しつつ各群、各レンズの屈折力を強くする
ことができ、その結果、レンズ枚数の削減並びに全長及
び移動量の短縮化を可能にしている。Such a decrease in performance can be suppressed by using many aspheric surfaces, and in the present invention, by using three or more aspheric surfaces in the entire system as described above,
This makes it possible to maintain performance while making the lens more compact and lower in cost. For example, if an aspherical surface is used for the object-side lens in the rear group, it is effective in correcting spherical aberration, and if an aspherical surface is used for the most image-side lens,
This is effective in correcting coma aberration at the periphery of the screen. On the other hand, if the front group center weight also uses an aspheric surface for the object side lens,
This is effective in correcting distortion aberration and curvature of field near the wide-angle end. In this way, by effectively using many aspherical surfaces, it is possible to strengthen the refractive power of each group and each lens while maintaining performance, resulting in a reduction in the number of lenses and the overall length and travel distance. is possible.
前記前群が2枚のレンズから成り、前記後群が3枚のレ
ンズから成っていてもよく、また前群及び後群共2枚の
レンズから成っていてもよい。The front group may consist of two lenses, the rear group may consist of three lenses, or both the front group and the rear group may consist of two lenses.
前群中の全ての非球面は次の条件式■を満足することが
望ましい。It is desirable that all the aspheric surfaces in the front group satisfy the following conditional expression (2).
条件式■は、非球面の最大有効径をYsaxとするとき
、o<y<0.8Y、sxの任意の光軸垂直方向高さy
に対して、
・(X(y)−X@(y)) < 0.02・・・・
・・■ここで、φI:前群の屈折力
N :非球面の物体側媒質の屈折率
N°:非球面の像側媒質の屈折率
X(y) :非球面の面形状
Xs (y) :非球面の参照球面形状但し、
+ ΣA+y
≧2
r:非球面の基準曲率半径
ε:2次曲面パラメータ
A、二非球面係数
7:非球面の近軸曲率半径
である。Conditional expression (■) is, when the maximum effective diameter of the aspherical surface is Ysax, o<y<0.8Y, and the arbitrary optical axis vertical height y of sx.
For, ・(X(y)-X@(y)) < 0.02...
...■Here, φI: Refractive power of the front group N: Refractive index of the aspherical object-side medium N°: Refractive index of the aspherical image-side medium X(y): Surface shape of the aspherical surface Xs (y) : Reference spherical shape of the aspherical surface, however, +ΣA+y≧2 r: Reference radius of curvature of the aspherical surface ε: Quadratic surface parameter A, secondary aspherical coefficient 7: Paraxial radius of curvature of the aspherical surface.
条件式■の上限をこえると広角端〜中間焦点距離領域の
中間画角帯において、正の歪曲収差及び像面湾曲の正偏
移傾向が大きくなる。また、下限をこえると中間焦点距
離領域〜望遠端で負の歪曲収差が大きくなり、加えて全
ズーム域で像面湾曲の負偏移傾向が著しくなる。When the upper limit of conditional expression (2) is exceeded, the tendency for positive distortion and positive deviation of the curvature of field increases in the intermediate field angle band from the wide-angle end to the intermediate focal length region. Furthermore, when the lower limit is exceeded, negative distortion becomes large from the intermediate focal length region to the telephoto end, and in addition, the negative shift tendency of the field curvature becomes significant in the entire zoom range.
前群中に両面が非球面のレンズを用いた場合、一方の面
は次の条件式■を満たし、他方の面は次の条件式■を満
たすことが望ましい。When a lens having both surfaces aspherical is used in the front group, it is desirable that one surface satisfies the following conditional expression (2) and the other surface satisfies the following conditional expression (2).
条件式■は、非球面の最大有効径をYaaxとするとき
、0.8Y、、、<y<Y、、xの任意の光軸垂直方向
高さyに対して、
・(X(y)−Xs(y)) < O・・・・・・■
である。Conditional formula (2) is, when the maximum effective diameter of the aspherical surface is Yaax, 0.8Y, , < y < Y, , For any height y in the direction perpendicular to the optical axis of x, ・(X(y) −Xs(y)) < O・・・・・・■
It is.
条件式〇は、非球面の最大有効径をYIIImとすると
き、0.8Ymax<y<Ymawの任意の光軸垂直方
向高さyに対して、
・ (X(y)−Xs(y)) < 0.10 ・・
・・・・■である。Conditional expression 〇 is, when the maximum effective diameter of the aspherical surface is YIIIm, for any height y in the vertical direction of the optical axis where 0.8Ymax<y<Ymaw, ・(X(y)−Xs(y)) <0.10...
...■.
前群中において、条件式■を満たすような非球面は周辺
はど負の屈折力が弱く(正の屈折力が強く)なるという
ことを意味している。これによって、広角端近辺での歪
曲収差を補正している。更にこのとき、条件式■を満た
すような非球面を用いることによって像面湾曲を良好に
補正しているのである。In the front group, an aspherical surface that satisfies condition (2) means that the negative refractive power is weak (the positive refractive power is strong) at the periphery. This corrects distortion near the wide-angle end. Furthermore, at this time, by using an aspheric surface that satisfies conditional expression (2), the curvature of field is favorably corrected.
後群中の全ての非球面は次の条件式■を満足することが
望ましい。It is desirable that all aspheric surfaces in the rear group satisfy the following conditional expression (2).
条件式■は、非球面の最大有効径をYmawとするとき
、O< y< 0.7Y、□の任意の光軸垂直方向高さ
yに対して、
一〇・03〈φ・−(N’−N)−d。Conditional expression (■) is expressed as 10・03〈φ・−(N '-N)-d.
−(X(y)−Xs(y)) < 0.01−−−
・・−■ここで、φ2:後群の屈折力
である。-(X(y)-Xs(y)) < 0.01---
...-■ Here, φ2: Refractive power of the rear group.
条件式■の上限をこえると輪帯球面収差が負の大きな値
を持つようになり、絞り込みによるピント位置のずれが
問題となる。また、下限をこえると輪帯光束に対する球
面収差補正効果が過剰となり、他の諸収差と球面収差と
をバランスよく補正するのが困難となる。この場合、球
面収差が波打ったような形になりやすくなる。If the upper limit of conditional expression (2) is exceeded, the annular spherical aberration will have a large negative value, and a shift in the focus position due to aperture will become a problem. Moreover, when the lower limit is exceeded, the spherical aberration correction effect on the annular beam becomes excessive, making it difficult to correct other various aberrations and spherical aberration in a well-balanced manner. In this case, spherical aberration tends to take a wavy shape.
後群中に両面が非球面のレンズを用いた場合、一方の面
は次の条件式■を満たし、他方の面が次の条件式■を満
たすことが望ましい。When a lens having aspherical surfaces on both surfaces is used in the rear group, it is desirable that one surface satisfies the following conditional expression (2) and the other surface satisfies the following conditional expression (2).
条件式〇は、非球面の最大有効径をYlla工とすると
き、0゜7Y、、ア<y<Y□、の任意の光軸垂直方向
高さyに対して、
・ (X(y)−Xs(y)) < O・・・・・
・■である。Conditional expression 〇 is expressed as follows: When the maximum effective diameter of the aspherical surface is Ylla, for any height y in the vertical direction of the optical axis of 0゜7Y, A<y<Y□, ・ (X(y) -Xs(y)) < O...
・It is ■.
条件式〇は、非球面の最大有効径をy。rとするとき、
0.7Ymax<y<Y□8の任意の光軸垂直方向高さ
yに対して、
Oくφ2・(N’−N)・ □
y
・(X(y)−Xi(y)) < 0.04・・・
・・・■である。Conditional expression 〇 indicates the maximum effective diameter of the aspherical surface as y. When r,
For any optical axis vertical height y where 0.7Ymax<y<Y□8, Okuφ2・(N'-N)・□y・(X(y)-Xi(y))<0 .04...
...■.
後群中において、条件式〇を満たすような非球面は周辺
はど正の屈折力が弱く(負の屈折力が強く)なるという
ことを意味している。また、条件式■は3次の収差領域
の範囲で球面収差のアンダー側への倒れをオーバー側へ
補正するための条件である。このとき、レンズの光軸が
ら遠い場所を通る軸上光については補正過剰になってし
まいオーバー側へ行ってしまうことがあるので、この光
をアンダー側へ戻すために条件式〇を満たすような周辺
はど正の屈折力が強く(負の屈折力が弱く)なる非球面
を他方の面に導入すればよいことになる。In the rear group, an aspherical surface that satisfies conditional expression (0) means that the positive refractive power will be weak (the negative refractive power will be strong) at the periphery. Furthermore, conditional expression (2) is a condition for correcting the inclination of spherical aberration to the under side to the over side within the range of the third-order aberration region. At this time, axial light that passes through a place far from the optical axis of the lens may be overcorrected and go to the over side, so in order to return this light to the under side, it is necessary to satisfy conditional expression 〇. In the periphery, an aspheric surface that has a strong positive refractive power (a weak negative refractive power) can be introduced on the other surface.
また、望ましくは条件式■を満たす側の非球面の基準球
面からのずれ量は、条件式■を満たす側の非球面の基準
球面からのずれ量より大きい方がよい。Further, it is preferable that the amount of deviation of the aspherical surface on the side satisfying conditional expression (2) from the reference spherical surface is larger than the amount of deviation from the reference spherical surface of the aspherical surface on the side satisfying conditional expression (2).
前群及び後群は次の条件式■、■を満足するように構成
されているのが望ましい。It is desirable that the front group and the rear group be constructed so as to satisfy the following conditional expressions (1) and (2).
3二で、 φiI:広角端における全系の屈折力 φT:望遠端における全系の屈折力 β :ズーム比 但し、 φ1〈0 β = φ−/φ T である。At 32, φiI: Refractive power of the entire system at the wide-angle end φT: Refractive power of the entire system at the telephoto end β: Zoom ratio However, φ1〈0 β = φ−/φT It is.
これらは、レンズ全長、ズーミングのための移動量、バ
ックフォーカス及び諸収差の補正状態を良好なバランス
に保つための条件である。These are conditions for keeping the overall length of the lens, the amount of movement for zooming, the back focus, and the state of correction of various aberrations in a good balance.
条件式■の下限をこえると、ペッツバール和が負の大き
な値をとるようになり、像面が正方向に著しく倒れてし
まい、且つ広角端での歪曲収差が正の大きな値をとるよ
うになる。また、上限をこえると、ズーミングに伴う前
・後群間の間隔変化を大きくとることが必要となり、広
角端において前・後群間が大きく離れるためにレンズ全
長の増大を招く。When the lower limit of conditional expression (■) is exceeded, the Petzval sum will take a large negative value, the image plane will tilt significantly in the positive direction, and the distortion at the wide-angle end will take a large positive value. . Furthermore, when the upper limit is exceeded, it is necessary to increase the distance between the front and rear groups during zooming, and the distance between the front and rear groups becomes large at the wide-angle end, resulting in an increase in the overall length of the lens.
条件式〇の下限をこえると、広角端でバックフォーカス
を適切な値(広角端の焦点距離の1.1倍以上)に保つ
ことが困難となって、ミラーを配置するためのスペース
の確保が困難となる。また、上限をこえると、前群及び
後群のズーミングによる移動量が過大となり鏡胴構成上
不利になってしま次の条件式〇、[相]を満足すること
もレンズ全長。If the lower limit of conditional expression 〇 is exceeded, it becomes difficult to maintain the back focus at an appropriate value (1.1 times or more of the focal length at the wide-angle end) at the wide-angle end, making it difficult to secure space for arranging the mirror. It becomes difficult. In addition, if the upper limit is exceeded, the amount of movement of the front and rear groups during zooming will be excessive, which will be disadvantageous in terms of lens barrel construction.The following conditional expression 〇, [phase] must also be satisfied when determining the overall length of the lens.
ズーミングのための移動量、バックフォーカス及び諸収
差の補正状態を良好なバランスに保つために有効である
。This is effective for maintaining a good balance between the amount of movement for zooming, the back focus, and the state of correction of various aberrations.
但し、 φ1〈0 である。However, φ1〈0 It is.
条件式■は、広角端における全系の屈折力と前群の屈折
力との比を規定するものである。条件式〇の上限をこえ
ると、前群屈折力が過大となり、前群中に非球面を用い
たとしても前群で発生する諸収差、特に像面湾曲と歪曲
収差の補正が困難となる。また、下限をこえると画面周
辺で下方性のコマ収差が発生する傾向が著しくなると共
に充分なバックフォーカスの確保が困難となる。Conditional expression (2) defines the ratio between the refractive power of the entire system and the refractive power of the front group at the wide-angle end. When the upper limit of conditional expression (0) is exceeded, the front group refractive power becomes excessive, and even if an aspherical surface is used in the front group, it becomes difficult to correct various aberrations occurring in the front group, especially curvature of field and distortion aberration. Furthermore, when the lower limit is exceeded, there is a marked tendency for downward coma aberration to occur at the periphery of the screen, and it becomes difficult to secure sufficient back focus.
条件式[相]は、広角端における全系の屈折力と後群の
屈折力との比を規定するものである。条件式[相]の上
限をこえると、後群屈折力が過大となり、後群中に非球
面を用いたとしても後群で発生する諸収差、特に球面収
差の補正が困難となる。また、下限をこえると、画面周
辺で下方性のコマ収差が発生する傾向が著しくなる。The conditional expression [phase] defines the ratio between the refractive power of the entire system and the refractive power of the rear group at the wide-angle end. When the upper limit of conditional expression [phase] is exceeded, the rear group refractive power becomes excessive, and even if an aspherical surface is used in the rear group, it becomes difficult to correct various aberrations occurring in the rear group, especially spherical aberration. Furthermore, when the lower limit is exceeded, there is a marked tendency for downward coma aberration to occur at the periphery of the screen.
本発明に係るズームレンズの前群の前、後群の後ろ、又
は前群と後群との間に、屈折力の殆どないレンズ系を付
加したとしても本発明の主旨から外れるものではない。Even if a lens system with almost no refractive power is added in front of the front group, behind the rear group, or between the front group and the rear group of the zoom lens according to the present invention, this does not depart from the spirit of the present invention.
尚、付加するレンズ系としては、屈折力の絶対値が全系
の望遠端における屈折力の3分の1以下のものが望まし
い。The additional lens system is preferably one in which the absolute value of the refractive power is one-third or less of the refractive power of the entire system at the telephoto end.
ス」1例−
以下、本発明に係るコンパクトなズームレンズの実施例
を示す。1 Example - Hereinafter, an example of a compact zoom lens according to the present invention will be shown.
但し、各実施例において、r、〜r+aは物体側から数
えた面の曲率半径、d1〜d、は物体側から数えた軸上
面間隔を示し、N1〜N6.シ1〜シ5は物体側から数
えた各レンズのd線に対する屈折率、アツベ数を示す。However, in each embodiment, r, ~r+a represent the radius of curvature of the surface as counted from the object side, d1~d represent the axial spacing as counted from the object side, and N1~N6. C1 to C5 indicate the refractive index and Atsube number of each lens with respect to the d-line counted from the object side.
また、fは全系の焦点距離、FNOは開放Fナンバーを
示す。Further, f indicates the focal length of the entire system, and FNO indicates the open F number.
尚、実施例中、曲率半径に*印を付した面は非球面で構
成された面であることを示し、前記非球面の面形状(X
(y))を表わす式で定義するものとする。In addition, in the examples, a surface with a radius of curvature marked with * indicates that it is an aspherical surface, and the surface shape of the aspherical surface (X
(y)).
〈実施例1〉
f”36.0〜50.0〜68.OFNO=4.6〜5
.6〜6.8rs*304.102
弁li蓬lL
r4 : ε=0.97677
A、=−0,46960X 10−’
Aa=0.18970X 10−6
As=−0,10218X 10−’
A+s;0.92120X 10−”
Al1”0.98648X10−”
rs : g =0.13064X 10A4=−
0,44294X10−’
ム・=−0,32517X10−’
A参=−0.63065X 1O−9
A、。=−0,74042X10”I’A+e=−0,
17854X10−”
r7 : g =0.100IOX 10A4:0.
90729X10−’
A6=−0,14917X10−’
Amニー0.98660X10−”
A+5=−0,61239X10−”
A+2=−0,25320X 1O−12r8 : ε
=0.93899
A4=o、17872X 10−”
Aa=0.41747X 10−’
As=0.82935X 10−”
A+ @”−0,55230X10−’AI2”0.9
6840X10−”
〈実施例2〉
f=36.0〜50.0〜68.0
r*I 78.899
弁11【孤J〔
ra : t :0.100OOX10Aa”−0
,24751X10−’
Aa=0.71600x 10−”
As”−0,84637X10−”
ra : ε=O,100OOX 10Aa=−0
,63349X 10−’
As” 0.32364X10−’
F so =4.6〜5.6〜6.8
A*ニー0.11035X10−7
re : g :O,100OOX 10Aa=−
0,67323X10−’
Aaニー0.76224X 10−’
As”−0,18025X 1叶8
r7 : ε=O,100OOX 10A、=0.74
134x 10−’
^aニー0.80597X10’″6
As=0.94950x 10−”
r@ : ε=0.10000×10
A4=0.13887X 10−”
Aa=−0,21954X 10−”
As=0.55614X 10−”
〈実施例3〉
f”36.O〜50.0〜88.OFNO=4.6〜5
.2〜5.6r6申 13,535
rll 73.585
弁ITL係JL
ra : ε=0.97677
A、=−0.31833X 10−’
Aa=0.11552X 10−’
As=−0.38664X 1O−8
A++=0.23753X 1O−1er5 : ε=
0.11687X 10Aa=−0,26050x 1
0−’
As=−0.73075X10−’
A++Asニー0.73075X10
−’A++ニー1257X 10−”
r7 : ε:0.10098X10A4=0.95
703x 1O−a
Ae=0.11262X 10−”
da 22.944〜12.029〜4.600rs
率
As”−0,82765X 10−”
^+sニー0.31146X 10−”Al1”−0,
21000X 10−”rs : ε=0.94743
AJ=0.15530X 10−”
Aa=0,51579X 10−’
Aa=0.10239X 10−’
A1日=−0,55151X10−’
AI2”0.50000X 10−口
〈実施例4〉
f =se、o〜so、o〜ss、o F 5o=4
.6〜5.6〜6.8132.522
尖J■【葺lL
r2 : ε=0.14772X 10A4ニー0
.19835X 10−’
Ae=−0.66077X 10−容
A*;−0,91491X 10−”
rs : t =0.12911X 10A4=−
0,19849X 10−’
As=0.59001X 10−’
Asニー0.14707X 10−”
r7 : t =O,1oooox 10A4=0.
98005X 1O−6
Aa=−0,37611X10−’
Asニー0.19401X10−@
r8 : ε=0.100OOX 10A4:0.68
420X 10−’
Aa=−0,35319X10−”
As2−0.11571X 10−”
〈実施例5〉
f=36.0〜50.0〜68.OFNO=4.6〜5
.6〜6.8皇」じ1【juJ■わ1 乳扼蔓 ヱユき
rrg*
65.1.87
韮」11停止C
r、 : ε=0.92540
A、=−0,12025X 10−’
Aa=0.52533x 1O−7
As=−0,32581X 1O−111r2 :
ε:0.1oooox 10At;−0,14468
X10−’
Aa”0.87723X 1O−7
As=0.78426X 10−’
ra : e ;0.331F30A、=−0,1
1960X10−’
Aa=0.14748X 10−’
As=0.80248X 10−’
r4 : ε=0.95585
Aj=−0,51352X 10−’
Aa:0.13347X 10−’
A@ニー0.13437X 10−”
r6 : E =0.12368X 10A、=〜
0.22771X 10−’
As:0.38746X 1O−7
A、=−0,12825X 10−’
r6 : ε=−0,13009X 10A4=0.3
0913X 10−’
Aa”0.45464X 10”
Ae=−0,68843X 10−”
rr : 5 =0.26985X 10Aa=0
.15665x10−”
As”−0,54318X 10−’
Asニー0.17532X 10−”
rs : ε=−0,21970
A4=0.19799X 10−”
Aa:0.32779X10−’
Asニー0.57687X10−’
〈実施例6〉
f=36.0〜50,0〜68.0
11も1juJ00【
FNO=4.6〜5.2〜5.6
屈JL!Zjげ1数
rls −16,275
吏1m1L
r2 : ε=0.10000X 10A、=−0,1
5505x10−’
A@=0.83879X 10−’
Aa=−0.24127X 10−”
A+s=0.23757X 10−”
A貫2ニー0.80847X 1O−13ra :
e =O,100OOX 10A4”J、11854
X 10−’
Ae=0.53054X 10−フ
As=−o、14796X 10−@
A1゜=0.12514X 10−”
A貫2ニー0.51061X10−”
rs : e =C1,1(100OX 10A4
”−0,11644X 10−’
Aa=0.82535X 1O−7
Ae;−0,16456X10−@
A+s=0.15148X10−”
Al2=−0,61958X10−”
r7 : ε=O,100OOX 10At=−0,2
2564x 10−’
As=0.28631X 1O−7
A*”0.40710X 10−’
A1g=0.94855X10−”
Al2=0.43296X 10伺3
r8 : ε=o、1oooox i。<Example 1>f"36.0~50.0~68.OFNO=4.6~5
.. 6 to 6.8rs*304.102 Valve li yo l L r4 : ε=0.97677 A,=-0,46960X 10-' Aa=0.18970X 10-6 As=-0,10218X 10-'A+s;0 .92120X 10-” Al1”0.98648X10-” rs: g =0.13064X 10A4=-
0,44294X10-' M = -0,32517X10-' A reference = -0.63065X 1O-9 A,. =-0,74042X10"I'A+e=-0,
17854X10-” r7: g =0.100IOX 10A4:0.
90729X10-'A6=-0,14917X10-' Am knee 0.98660X10-"A+5=-0,61239X10-" A+2=-0,25320X 1O-12r8: ε
=0.93899 A4=o, 17872X 10-" Aa=0.41747X 10-' As=0.82935X 10-" A+ @"-0,55230X10-'AI2"0.9
6840X10-"<Example2> f=36.0-50.0-68.0 r*I 78.899 Valve 11 [ra: t: 0.100OOX10Aa"-0
, 24751
, 63349
0,67323
134x 10-' ^a knee 0.80597X10'''6 As=0.94950x 10-" r@: ε=0.10000x10 A4=0.13887X 10-" Aa=-0,21954X 10-" As= 0.55614X 10-” <Example 3> f”36. O~50.0~88. OFNO=4.6~5
.. 2~5.6r6 13,535 rll 73.585 Valve ITL JL ra: ε=0.97677 A,=-0.31833X 10-' Aa=0.11552X 10-' As=-0.38664X 1O- 8 A++=0.23753X 1O-1er5: ε=
0.11687X 10Aa=-0,26050x 1
0-'As=-0.73075X10-' A++As knee 0.73075X10-'A++ knee 1257X 10-" r7: ε:0.10098X10A4=0.95
703x 1O-a Ae=0.11262X 10-” da 22.944~12.029~4.600rs
Rate As"-0,82765X 10-" ^+s knee 0.31146X 10-"Al1"-0,
21,000 - Mouth <Example 4> f = se, o~so, o~ss, o F 5o=4
.. 6 ~ 5.6 ~ 6.8132.522 Tip J■ [FukilL r2: ε=0.14772X 10A4 Knee 0
.. 19835
0,19849X 10-' As = 0.59001X 10-' As knee 0.14707
98005X 1O-6 Aa=-0,37611X10-' As knee 0.19401X10-@r8: ε=0.100OOX 10A4:0.68
420X 10-'Aa=-0,35319X10-" As2-0.11571X 10-"<Example5> f=36.0-50.0-68. OFNO=4.6~5
.. 6-6.8 Emperor'ji1 [juJ■wa1 Milk vine Eyukirrg* 65.1.87 Ni'11 stop Cr: ε=0.92540 A,=-0,12025X 10-' Aa=0.52533x 1O-7 As=-0,32581X 1O-111r2:
ε: 0.1oooox 10At; -0,14468
X10-'Aa"0.87723X 1O-7 As=0.78426X 10-' ra: e ;0.331F30A, =-0,1
1960X10-' Aa=0.14748X 10-' As=0.80248X 10-' r4: ε=0.95585 Aj=-0,51352X 10-' Aa:0.13347X 10-' A@knee 0.13437X 10 -” r6: E =0.12368X 10A, =~
0.22771X 10-' As: 0.38746X 1O-7 A, = -0,12825X 10-' r6: ε=-0,13009X 10A4=0.3
0913X 10-'Aa"0.45464X10" Ae=-0,68843X 10-" rr: 5 =0.26985X 10Aa=0
.. 15665x10-"As"-0,54318X10-' As knee 0.17532X 10-" rs: ε=-0,21970 A4=0.19799X 10-" Aa: 0.32779X10-' As knee 0.57687X10-'<Example6> f=36.0~50,0~68.0 11 1juJ00 [FNO=4.6~5.2~5.6 Ku JL! Zj number rls -16,275 1m1L r2: ε=0.10000X 10A,=-0,1
5505x10-' A@=0.83879X 10-' Aa=-0.24127X 10-" A+s=0.23757X 10-" A through 2 knees 0.80847X 1O-13ra:
e = O, 100OOX 10A4”J, 11854
X 10-' Ae = 0.53054X 10-F As = -o, 14796X 10-@ A1゜ = 0.12514
"-0,11644X 10-' Aa=0.82535X 1O-7 Ae;-0,16456X10-@A+s=0.15148X10-"Al2=-0,61958X10-" r7: ε=O,100OOX 10At=-0 ,2
2564x 10-' As=0.28631X 1O-7 A*"0.40710X 10-'A1g=0.94855X10-" Al2=0.43296X 10 3 r8: ε=o, 1ooooox i.
An”0.18334X 10−’
As=−0.55751X 10−’
A@”0.18495X 10−”
AI自=0.20056X 10−’自A+a=0.2
5087X 10−”
rll : ε:0.10000×10A、=−0,1
3083X 10−’
Aeニー0.31645X 10−’
A*=0.63373X 10−’
A、。=−Q、 10362 X 10−目A+t=−
0,26952X 10月3〈実施例7〉
f=28.8〜44.3〜88.0 Fso=4.6
〜5.2〜5.6da 5.668
rls −17,384
弁IJL孤1
rl : ε:0,100OOX 10A4=0.
58892x 1O−6
Ae=0.48505x 1O−7
A*=−0,38701X 10−’
A+s”0.65002X 1O−12A12=−0,
22233X 10伺5r2 : e =O,100
OOX 10Aa=−0,94518X 1O−5
Ae=0.39865X 1O−7
Aa=−0,21510X10−”
A+i+=−0,12936X10−”Al2”−0,
13875X 10〜13ra : 5 :0.1
00OOX 10A、=−0,78f392X 1O−
6Aa =−0,22629X10−”
Ag=−0,77105X 10−”
A+s:0.41977X 10−目
A+a=−0,84804X 1叶14r、: e
=O,1oooox10A、=−0.21705X 1
0−’
As”J、83224X10−”
A@=−0,11419X 10−”
A1會=−0,56839X 10− + 2A+2:
0.88732X 1O−I4rγ : ε=0.10
0OOX 10A4=−0,97076x 10−’
Ae=−0,46160x 10−?
A*=0.2s689x10−’
A+s;−0,15883X10−”
A1□=0.35263X 1叶l4
r8: ε=O,100OOX10
At:o、19211X10〜4
As”−0,35547X 10−”
Aa=−0,75079X 10−’
A+s”−0,23221XlO−”
方」11正IL
r、: ε=O,100OOX 10A、=−0,1
7314X 10−’
Aeニー0.11099X10−”
As=0.12451x 10−”
A+@ニー0.72864X 10伺IA+2=0.2
6533X 10−”
r2 : ε:0.10000X10A、=−0,
23680X10−’
A6=−0.15564X 10−’
As”−0,11770X10−”
A+i”0.89290X10−”
A+2=0.34891X 1O−13r4 : ε=
O,100OOX 10A4=−0,25119x10
−’
As =0.34.222 x 1叶7As”−0,8
7319X 10−’
A+s”0.37125X 10−■
A+2=−0,20888X 10−”r5 :
ε=O,100OOX 10
A+2=0.60653X 10−”
r9 : ε=O,100OOX 10Aa=−0,8
1788X10−’
Asニー0.67632X10−’
As−−0,10159X10−”
A1・=0.42857X 1O−12A+2=0.2
3794X10−+4
〈実施例8〉
f=39.0〜55.1=78.0 Fso=4.8
〜5.2〜5.61棗主1]ロj口L」 厩近! LL
べ鳳r+e −26,792
A、=0.20886x10−6
Ae=0.65790X10−7
A@エニー、 64905 X 10−”A+g=0.
65032X 10−目
A+2”−〇、26549X10−”
r7 : ε=O,100OOX 10A、=−0,2
2551X 1O−J
Aa=0.22428x10−’
A8:0゜48396X10−”
A++=0.61312X 10−”
A12=o、56137X10−”
ra : ε =o、1oooox 10A、=0
.24322X10−’
Aa”0.10926X 1叶6
Aa”0.11323X10−’
A+e:0.15914X10−”
A+2=0.14505X 1O−12rQ :
ε”O,100OOX 10A4=−0,3I5I4X
10−5
Ae=−0,79866x 10−’
ls”o、86102X 10−’
A+s=0.29418X 10−”
A+g=0.70709X 10−14〈実施例日〉
f=36.0〜49.5〜68.OFNO=4.6〜5
.2〜5.6rl : t: =O,100OOX
10A、=0.20109X 10”
As=0,13635X 10−’
As=0.11051X 10−’
A10=0.431342X 10−13AI2”−0
,51481X10−”
r2 : t =O,100OOX10A4=0.8
3021X 1O−6
Ae”0.33585X 10−’
A*=0.29980X 10−”
AtI=0.26751X 10−”
Al1”0.23205X10−”
r3 : ε=O,100OOX 10Aa”−0,6
8916X10−’
Ae=−0.12267X 10−’
As=0.16135X 10−”
Al1”0.12568X 10−”
A+z=0.72978X10−”
ra : g:o、10000X10A4;−0,
63114X 10−’
As=−0.87244X10−’
As”0.14728X 10−’
A+i:0.20899X10−”
A+2=−0,17228X 10−”r5: ε=
O,100OOX 10Aa=−0,16890x 1
0−’
Aa:0.19098X 10−”
Asニー0.11329X10−”
A+ *=0.93460 X 10−口A+2=0.
41743X 10−”
r6 : ε=0.10000×10
A、=0.24647X 10”
As:0.12879X 10−”
A審=0.45128X 10−”
A+s”−0,11513X10−”
A+2=0.56075X 10−”
rt : t =O,100OOX 10A4=0
.16088X 10−’
Asニー0.13611X10−’
Asニー0.23345X 10−”
A、。=−0,26920X10−’自A+2=−0,
29101X10憎2
r++ : t =O,100OO×10A4=0
.52549X 10”
As:0.19383X 1叶6
Aa;−0,91899X 1O−Q
A+aニー0.43772X 10−目A+2=0.1
0395X 10−”
第1図〜第9図は、前記実施例1〜9に対応するレンズ
構成図であり、図中の矢印は前記前群及び後群の最広角
端(S)から置型遠端(L)にかけての移動を模式的に
示している。An"0.18334X 10-' As=-0.55751X 10-'A@"0.18495X10-" AI self=0.20056X 10-' self A+a=0.2
5087X 10-” rll: ε:0.10000×10A, =-0,1
3083X 10-' Ae knee 0.31645X 10-' A*=0.63373X 10-' A,. =-Q, 10362 X 10th A+t=-
0,26952X October 3 <Example 7> f=28.8~44.3~88.0 Fso=4.6
~5.2~5.6da 5.668 rls -17,384 Valve IJL arc 1 rl: ε:0,100OOX 10A4=0.
58892x 1O-6 Ae=0.48505x 1O-7 A*=-0,38701X 10-' A+s”0.65002X 1O-12A12=-0,
22233X 10 5r2: e = O, 100
OOX 10Aa=-0,94518X 1O-5 Ae=0.39865X 1O-7 Aa=-0,21510X10-"A+i+=-0,12936X10-"Al2"-0,
13875X 10~13ra: 5:0.1
00OOX 10A, =-0,78f392X 1O-
6Aa = -0,22629X10-" Ag=-0,77105X 10-" A+s:0.41977X 10th A+a=-0,84804X 1 leaf 14r,: e
=O, 1oooox10A, =-0.21705X 1
0-'As"J,83224X10-" A@=-0,11419X 10-" A1 meeting=-0,56839X 10- + 2A+2:
0.88732X 1O-I4rγ: ε=0.10
0OOX 10A4=-0,97076x 10-' Ae=-0,46160x 10-? A*=0.2s689x10-'A+s;-0,15883X10-" A1=0.35263X 1 leaf l4 r8: ε=O,100OOX10 At:o, 19211X10~4 As"-0,35547X 10-" Aa= -0,75079
7314X 10-' Ae knee 0.11099
6533X 10-" r2: ε: 0.10000X10A, = -0,
23680X10-' A6=-0.15564X 10-'As"-0,11770X10-"A+i"0.89290X10-" A+2=0.34891X 1O-13r4: ε=
O,100OOX 10A4=-0,25119x10
-' As =0.34.222 x 1 leaf 7As"-0,8
7319X 10-'A+s" 0.37125X 10-■ A+2=-0,20888
1788X10-' As knee 0.67632X10-'As--0,10159X10-" A1・=0.42857X 1O-12A+2=0.2
3794X10-+4 <Example 8> f=39.0~55.1=78.0 Fso=4.8
~5.2~5.61 Natsume 1] Roj mouth L” Stable near! LL
Beho r+e -26,792 A,=0.20886x10-6 Ae=0.65790X10-7 A@any, 64905 X 10-"A+g=0.
65032
2551X 1O-J Aa=0.22428x10-' A8: 0゜48396X10-" A++=0.61312X 10-" A12=o, 56137X10-" ra: ε =o, 1oooox 10A, =0
.. 24322X10-'Aa"0.10926X 1 leaf 6 Aa"0.11323X10-'A+e:0.15914X10-" A+2=0.14505X 1O-12rQ:
ε”O, 100OOX 10A4=-0,3I5I4X
10-5 Ae=-0,79866x 10-'ls"o, 86102X 10-' A+s=0.29418X 10-" A+g=0.70709X 10-14 <Example date> f=36.0-49.5 ~68. OFNO=4.6~5
.. 2~5.6rl: t: =O, 100OOX
10A, = 0.20109X 10" As = 0.13635X 10-' As = 0.11051X 10-' A10 = 0.431342X 10-13AI2"-0
,51481X10-"r2: t=O,100OOX10A4=0.8
3021X 1O-6 Ae"0.33585X 10-' A*=0.29980X 10-" AtI=0.26751X 10-"Al1"0.23205X10-" r3: ε=O, 100OOX 10Aa"-0,6
8916X10-' Ae=-0.12267X 10-' As=0.16135X 10-"Al1"0.12568X10-"A+z=0.72978X10-" ra: g:o, 10000X10A4;-0,
63114X 10-'As=-0.87244X10-'As"0.14728X10-'A+i:0.20899X10-" A+2=-0,17228X 10-"r5: ε=
O,100OOX 10Aa=-0,16890x 1
0-' Aa: 0.19098X 10-" As knee 0.11329X10-" A+ *=0.93460 X 10-mouth A+2=0.
41,743 56075X 10-” rt: t=O, 100OOX 10A4=0
.. 16088X 10-' As knee 0.13611
29101X102 r++: t=O, 100OO×10A4=0
.. 52549X 10" As: 0.19383X 1 leaf 6 Aa; -0,91899X 1O-Q A+a knee 0.43772X 10-th A+2=0.1
0395 The movement toward (L) is schematically shown.
実施例1,2及び4は、いずれも物体側より順に像側に
凹の負メニスカスレンズより成る第ルンズ及び物体側に
凸の正メニスカスレンズより成る第2レンズから成る前
群と9両凸の正の第3レンズ及び両凹の負の第4レンズ
から成る後群とから構成されている。尚、実施例1にお
いて、第2レンズの像側の面、第3レンズの物体側の面
及び第4レンズの両面は非球面である。実施例2におい
て、第2レンズの像側の面、並びに第3レンズ及び第4
レンズの両面は非球面である。実施例4において、第ル
ンズの像側の面、第3レンズの物体側の面及び第4レン
ズの両面は非球面である。Examples 1, 2, and 4 all have a front group consisting of, in order from the object side, a first lens consisting of a negative meniscus lens concave toward the image side and a second lens consisting of a positive meniscus lens convex toward the object side; It is composed of a rear group consisting of a positive third lens and a biconcave negative fourth lens. In Example 1, the image-side surface of the second lens, the object-side surface of the third lens, and both surfaces of the fourth lens are aspherical surfaces. In Example 2, the image side surface of the second lens, the third lens and the fourth lens
Both surfaces of the lens are aspheric. In Example 4, the image-side surface of the third lens, the object-side surface of the third lens, and both surfaces of the fourth lens are aspherical surfaces.
実施例3は、物体側より順に像側に凹の負メニスカスレ
ンズより成る第ルンズ及び物体側に凸の正メニスカスレ
ンズより成る第2レンズから成る前群と9両凸の正の第
3レンズ、両凹の負の第4レンズ及び物体側に凸の正メ
ニスカスレンズより成る第5レンズから成る後群とから
構成されている。尚、実施例3において、第2レンズの
像側の面、第3レンズの物体側の面及び第4レンズの両
面は非球面である。Embodiment 3 includes a front group consisting of, in order from the object side, a first lens consisting of a negative meniscus lens concave toward the image side and a second lens consisting of a positive meniscus lens convex toward the object side, and a positive third lens having nine biconvex sides. It consists of a rear group consisting of a biconcave negative fourth lens and a fifth lens consisting of a positive meniscus lens convex toward the object side. In Example 3, the image-side surface of the second lens, the object-side surface of the third lens, and both surfaces of the fourth lens are aspherical surfaces.
実施例5は、物体側より順に像側に凹の負メニスカスレ
ンズより成る第ルンズ及び両凸の正の第2レンズから成
る前群と2両凸の正の第3レンズ及び物体側に凹の負メ
ニスカスレンズより成る第4レンズから成る後群とから
構成されている。Embodiment 5 includes, in order from the object side, a first lens consisting of a negative meniscus lens concave to the image side, a front group consisting of a biconvex positive second lens, a biconvex positive third lens, and a concave lens concave to the object side. and a rear group consisting of a fourth lens consisting of a negative meniscus lens.
尚、実施例5において、全てのレンズの両面は非球面で
ある。In Example 5, both surfaces of all lenses are aspherical.
実施例6は、物体側より順に両凹の負の第ルンズ及び両
凸の正の第2レンズから成る前群と。Embodiment 6 has a front group consisting of a biconcave negative first lens and a biconvex positive second lens in order from the object side.
両凸の正の第3レンズ、両凹の負の第4レンズ及び像側
に凸の正メニスカスレンズより成る第5レンズから成る
後群とから構成されている。尚、実施例6において、第
ルンズの像側の面、第2レンズの像側の面、第3レンズ
の物体側の面、第4レンズの両面及び第5レンズの物体
側の面は非球面である。It is composed of a rear group consisting of a biconvex positive third lens, a biconcave negative fourth lens, and a fifth lens consisting of a positive meniscus lens convex to the image side. In Example 6, the image-side surface of the second lens, the image-side surface of the second lens, the object-side surface of the third lens, both surfaces of the fourth lens, and the object-side surface of the fifth lens are aspherical. It is.
実施例7は、物体側より順に像側に凹の負メニスカスレ
ンズより成る第ルンズ及び物体側に凸の正メニスカスレ
ンズより成る第2レンズから成る前群と1両凸の正の第
3レンズ、両凹の負の第4レンズ及び像側に凸の正メニ
スカスレンズより成る第5レンズから成る後群とから構
成されている。尚、実施例7において、第ルンズの両面
、第2レンズの像側の面、第3レンズの物体側の面、第
4レンズの両面及び第5レンズの物体側の面は非球面で
ある。Embodiment 7 includes a front group consisting of, in order from the object side, a first lens consisting of a negative meniscus lens that is concave toward the image side and a second lens consisting of a positive meniscus lens convex toward the object side, and a third lens that is biconvex positive. It consists of a rear group consisting of a biconcave negative fourth lens and a fifth lens consisting of a positive meniscus lens convex to the image side. In Example 7, both surfaces of the second lens, the image-side surface of the second lens, the object-side surface of the third lens, both surfaces of the fourth lens, and the object-side surface of the fifth lens are aspherical.
実施例8は、物体側より順に像側に凹の負メニスカスレ
ンズより成る第ルンズ及び両凸の正の第2レンズから成
る前群と9両凸の正の第3レンズ、両凹の負の第4レン
ズ及び像側に凸の正メニスカスレンズより成る第5レン
ズから成る後群とから構成されている。尚、実施例8に
おいて、第1レンズの両面、fI!j2レンズの像側の
面、第3レンズの物体側の面、第4レンズの両面及び第
5レンズの物体側の面は非球面である。Embodiment 8 has a front group consisting of a concave negative meniscus lens, a biconvex positive second lens, a biconvex positive third lens, and a biconcave negative lens in order from the object side to the image side. It consists of a rear group consisting of a fourth lens and a fifth lens consisting of a positive meniscus lens convex to the image side. In Example 8, both surfaces of the first lens, fI! The image side surface of the j2 lens, the object side surface of the third lens, both surfaces of the fourth lens, and the object side surface of the fifth lens are aspheric surfaces.
実施例9は、物体側より順に像側に凹の負メニスカスレ
ンズより成る第ルンズ及び像側に凸の正メニスカスレン
ズより成る第2レンズから成る前群と7両凸の正の第3
レンズ及び物体側に凹の負メニスカスレンズより成る!
14レンズから成る後群とから構成されている。尚、実
施例9において、全てのレンズの両面は非球面である。Embodiment 9 has a front group consisting of, in order from the object side, a negative meniscus lens that is concave toward the image side and a second lens that is a positive meniscus lens that is convex toward the image side, and a positive third lens that is seven-convex.
Consists of a negative meniscus lens that is concave on the object side!
It consists of a rear group consisting of 14 lenses. In Example 9, both surfaces of all lenses are aspherical.
第10図〜第18図は前記実施例1から9に対応する収
差図で、それぞれ(S)は広角端焦点距離。10 to 18 are aberration diagrams corresponding to Examples 1 to 9, in which (S) indicates the focal length at the wide-angle end.
(M)は中間焦点距離、(L)は望遠端焦点距離での収
差を示している。また、実線(d)はd線に対する収差
を表わし、点線(SC)は正弦条件を表わす。更に点線
(DM)と実Jl (DS)はメリディオナル面とサジ
タル面での非点収差をそれぞれ表わしている。(M) shows the aberration at the intermediate focal length, and (L) shows the aberration at the telephoto end focal length. Further, the solid line (d) represents the aberration with respect to the d-line, and the dotted line (SC) represents the sine condition. Further, the dotted line (DM) and the real Jl (DS) represent astigmatism on the meridional plane and the sagittal plane, respectively.
第1表は実施例1〜9における条件式■中のの値をそれ
ぞれ示している。Table 1 shows the values of conditional expression (2) in Examples 1 to 9, respectively.
第2表は実施例1〜9における条件式〇中のぞれ示して
いる。Table 2 shows each of the conditional expressions 〇 in Examples 1 to 9.
第3表〜第11表はそれぞれ実施例1〜9に対応して、
前記yの値に対する各非球面における条件式■■■中の
を(I)で表わし、条件式■■■中の
を(II)で表わしている。Tables 3 to 11 correspond to Examples 1 to 9, respectively.
Conditional expression (■■■) for each aspherical surface for the value of y is represented by (I), and conditional expression (■■■) is represented by (II).
第1表(各実施例の条件式■■に対する値)第3表
(実施例1)
第2表(各実施例の条件式〇[相]に対する値)第4表
(その1)
(実施例2)
第4表
(その2)
(実施例2)
第6表
(実施例4)
第5表
(実施例3)
第7表
(その1)
(実施例5)
第7表(その2)
(実施例5)
第8表
(その2)
(実施例6)
第8表
(その1)
(実施例6)
第9表(その1)
(実施例7)
第9表(その2)
(実施例7)
第10表(その2)
(実施例8)
第10表(その1)
(実施例8)
第11表(その1)
(実施例9)
第11表(その2)
(実施例9)
丑」[の33=
以上説明したように本発明によれば、高い光学性能を維
持しながら、少ない枚数のレンズで低コスト 且つコン
パクトなズームレンズを実現することができる。また、
本発明に係るズームレンズを、−眼レフカメラに用いれ
ば、該カメラのコンパクト化、低コスト化を達成するこ
とができる。Table 1 (Values for conditional expression ■■ of each example) Table 3 (Example 1) Table 2 (Values for conditional expression 〇 [phase] of each example) Table 4 (Part 1) (Example 2) Table 4 (Part 2) (Example 2) Table 6 (Example 4) Table 5 (Example 3) Table 7 (Part 1) (Example 5) Table 7 (Part 2) ( Example 5) Table 8 (Part 2) (Example 6) Table 8 (Part 1) (Example 6) Table 9 (Part 1) (Example 7) Table 9 (Part 2) (Example 7) Table 10 (Part 2) (Example 8) Table 10 (Part 1) (Example 8) Table 11 (Part 1) (Example 9) Table 11 (Part 2) (Example 9) As explained above, according to the present invention, it is possible to realize a low-cost and compact zoom lens with a small number of lenses while maintaining high optical performance. Also,
If the zoom lens according to the present invention is used in a -eye reflex camera, the camera can be made more compact and lower in cost.
第1図、 第2図、 第3図、 第4図、 第5図、
第6図、第7図、第8図及び第9図は、それぞれ本発明
の実施例1〜9に対応するレンズ構成図である。
第10図、第11図、第12図、第13区、第14図、
第15図、第16図、gJ17図及び第18図は、それ
ぞれ本発明の実施例1〜9に対応する収差図である。
出願人 ミノルタカメラ株式会社Figure 1, Figure 2, Figure 3, Figure 4, Figure 5,
FIG. 6, FIG. 7, FIG. 8, and FIG. 9 are lens configuration diagrams corresponding to Examples 1 to 9 of the present invention, respectively. Figure 10, Figure 11, Figure 12, District 13, Figure 14,
FIG. 15, FIG. 16, gJ17, and FIG. 18 are aberration diagrams corresponding to Examples 1 to 9 of the present invention, respectively. Applicant Minolta Camera Co., Ltd.
Claims (1)
折力を有する後群とから成り、前群と後群との間の空気
間隔を変化させることによつて全系の焦点距離を変化さ
せるズームレンズにおいて、全系中に非球面を3面以上
有することを特徴とするズームレンズ。(1) Consists of a front group with negative refractive power and a rear group with positive refractive power in order from the object side, and by changing the air distance between the front group and the rear group, the focal point of the entire system is created. A zoom lens that changes distance, characterized by having three or more aspheric surfaces in the entire system.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2156422A JP3033138B2 (en) | 1990-06-13 | 1990-06-13 | Compact zoom lens |
US07/714,266 US5283693A (en) | 1990-06-13 | 1991-06-12 | Compact zoom lens system |
US08/139,900 US5446592A (en) | 1990-06-13 | 1993-10-19 | Compact zoom lens system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2156422A JP3033138B2 (en) | 1990-06-13 | 1990-06-13 | Compact zoom lens |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH0446310A true JPH0446310A (en) | 1992-02-17 |
JP3033138B2 JP3033138B2 (en) | 2000-04-17 |
Family
ID=15627406
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2156422A Expired - Lifetime JP3033138B2 (en) | 1990-06-13 | 1990-06-13 | Compact zoom lens |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP3033138B2 (en) |
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0534596A (en) * | 1991-08-02 | 1993-02-12 | Canon Inc | Zoom lens |
JPH05281470A (en) * | 1992-03-30 | 1993-10-29 | Olympus Optical Co Ltd | Small-sized two-group zoom lens |
US5381269A (en) * | 1993-03-30 | 1995-01-10 | Eastman Kodak Company | Zoom lens |
JPH08194159A (en) * | 1995-01-19 | 1996-07-30 | Mitsubishi Electric Corp | Zoom lens and projection type display device |
US5552936A (en) * | 1991-12-11 | 1996-09-03 | Fuji Photo Optical Co., Ltd. | Two-unit zoom lens |
JPH09311273A (en) * | 1996-05-21 | 1997-12-02 | Konica Corp | Variable focal distance lens |
US6154322A (en) * | 1998-02-19 | 2000-11-28 | Canon Kabushiki Kaisha | Zoom lens and photographing apparatus having the same |
JP2001004920A (en) * | 1999-06-17 | 2001-01-12 | Nikon Corp | Zoom lens |
US6934092B1 (en) | 1998-02-19 | 2005-08-23 | Canon Kabushiki Kaisha | Zoom lens and photographing apparatus having the same |
JP2006098432A (en) * | 2004-09-28 | 2006-04-13 | Olympus Corp | Electronic imaging apparatus |
US7542215B2 (en) | 2006-11-08 | 2009-06-02 | Nikon Corporation | Zoom lens system and optical apparatus using the same |
WO2012176470A1 (en) * | 2011-06-24 | 2012-12-27 | 富士フイルム株式会社 | Zoom lens and imaging device |
-
1990
- 1990-06-13 JP JP2156422A patent/JP3033138B2/en not_active Expired - Lifetime
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0534596A (en) * | 1991-08-02 | 1993-02-12 | Canon Inc | Zoom lens |
US5552936A (en) * | 1991-12-11 | 1996-09-03 | Fuji Photo Optical Co., Ltd. | Two-unit zoom lens |
JPH05281470A (en) * | 1992-03-30 | 1993-10-29 | Olympus Optical Co Ltd | Small-sized two-group zoom lens |
US5381269A (en) * | 1993-03-30 | 1995-01-10 | Eastman Kodak Company | Zoom lens |
JPH08194159A (en) * | 1995-01-19 | 1996-07-30 | Mitsubishi Electric Corp | Zoom lens and projection type display device |
JPH09311273A (en) * | 1996-05-21 | 1997-12-02 | Konica Corp | Variable focal distance lens |
US6154322A (en) * | 1998-02-19 | 2000-11-28 | Canon Kabushiki Kaisha | Zoom lens and photographing apparatus having the same |
US6934092B1 (en) | 1998-02-19 | 2005-08-23 | Canon Kabushiki Kaisha | Zoom lens and photographing apparatus having the same |
JP2001004920A (en) * | 1999-06-17 | 2001-01-12 | Nikon Corp | Zoom lens |
JP2006098432A (en) * | 2004-09-28 | 2006-04-13 | Olympus Corp | Electronic imaging apparatus |
US7542215B2 (en) | 2006-11-08 | 2009-06-02 | Nikon Corporation | Zoom lens system and optical apparatus using the same |
WO2012176470A1 (en) * | 2011-06-24 | 2012-12-27 | 富士フイルム株式会社 | Zoom lens and imaging device |
Also Published As
Publication number | Publication date |
---|---|
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