JPS6268112U - - Google Patents
Info
- Publication number
- JPS6268112U JPS6268112U JP13633086U JP13633086U JPS6268112U JP S6268112 U JPS6268112 U JP S6268112U JP 13633086 U JP13633086 U JP 13633086U JP 13633086 U JP13633086 U JP 13633086U JP S6268112 U JPS6268112 U JP S6268112U
- Authority
- JP
- Japan
- Prior art keywords
- lens
- lens group
- object side
- positive
- negative
- 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.)
- Pending
Links
- 230000004075 alteration Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
Landscapes
- Lenses (AREA)
Description
第１図は本考案の数値実施例１のレンズ断面図
、第２図Ａ，Ｂ，Ｃは本考案の数値実施例１の諸
収差図、第３図は本考案の数値実施例２のレンズ
断面図、第４図Ａ，Ｂ，Ｃは本考案の数値実施例
２の諸収差図、第５図は本考案の数値実施例３の
レンズ断面図、第６図Ａ，Ｂ，Ｃは本考案の数値
実施例３の諸収差図を示す。諸収差図は広角端、
中間、望遠端のズーム位置での収差を示す。
図中，は夫々第１レンズ群第２レンズ群、
Ｍはメリデイオナル焦線、Ｓはサジタル焦線を示
す。
Figure 1 is a cross-sectional view of the lens of Numerical Example 1 of the present invention, Figure 2 A, B, and C are various aberration diagrams of Numerical Example 1 of the present invention, and Figure 3 is the lens of Numerical Example 2 of the present invention. 4A, B, and C are various aberration diagrams of Numerical Example 2 of the present invention. FIG. 5 is a cross-sectional view of the lens of Numerical Example 3 of the present invention. Various aberration diagrams of Numerical Example 3 of the invention are shown. Various aberration diagrams are at the wide-angle end.
Shows aberrations at intermediate and telephoto end zoom positions. In the figure, are the first lens group, the second lens group, and
M indicates a meridional focal line, and S indicates a sagittal focal line.
Claims (1)
２レンズ群の２つのレンズ群より成り、第１レン
ズ群と第２レンズ群を同時に移動して変倍を行う
ズームレンズにおいて、前記第１レンズ群は物体
側より順に、像面側に強い負の屈折力を有する負
の第１レンズ、物体側へ凸を向けていて、その焦
点距離の絶対値が広角端における全系の焦点距離
の３０倍以上であり、広角側の負の歪曲を補正す
る形状を持つ少なくとも１面の非球面を有するメ
ニスカス状の第２レンズ、そして物体側へ凸面を
向けた正のメニスカス状の第３レンズとから成り
、前記第２レンズ群は正、負、正の基本屈折力配
置を有していて、物体側の正の部分は複数の正レ
ンズから成る広角ズームレンズ。 (2) 前記第２レンズはプラスチツク材料より成
ることを特徴とする実用新案登録請求の範囲第(1
)項記載の広角ズームレンズ。[Claims for Utility Model Registration] (1) Consists of two lens groups, a negative first lens group and a positive second lens group, in order from the object side, and the first lens group and the second lens group are moved simultaneously. In a zoom lens that performs magnification change, the first lens group includes, in order from the object side, a negative first lens having strong negative refractive power on the image plane side, a convex lens facing the object side, and the absolute focal length of the first lens group. a meniscus-shaped second lens having at least one aspherical surface whose value is 30 times or more the focal length of the entire system at the wide-angle end and a shape that corrects negative distortion on the wide-angle side; and a convex surface toward the object side. The second lens group has a positive, negative, and positive basic refractive power arrangement, and the positive part on the object side is a wide-angle lens consisting of a plurality of positive lenses. zoom lens. (2) Utility model registration claim No. (1) characterized in that the second lens is made of a plastic material.
Wide-angle zoom lens described in ).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13633086U JPS6268112U (en) | 1986-09-04 | 1986-09-04 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13633086U JPS6268112U (en) | 1986-09-04 | 1986-09-04 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6268112U true JPS6268112U (en) | 1987-04-28 |
Family
ID=31039336
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13633086U Pending JPS6268112U (en) | 1986-09-04 | 1986-09-04 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6268112U (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50145227A (en) * | 1974-05-14 | 1975-11-21 | ||
| JPS54114236A (en) * | 1978-02-24 | 1979-09-06 | Minolta Camera Co Ltd | Zoom lens system |
-
1986
- 1986-09-04 JP JP13633086U patent/JPS6268112U/ja active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50145227A (en) * | 1974-05-14 | 1975-11-21 | ||
| JPS54114236A (en) * | 1978-02-24 | 1979-09-06 | Minolta Camera Co Ltd | Zoom lens system |
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