JPS5958417U - Large aperture lens for close-up photography - Google Patents
Large aperture lens for close-up photographyInfo
- Publication number
- JPS5958417U JPS5958417U JP15324582U JP15324582U JPS5958417U JP S5958417 U JPS5958417 U JP S5958417U JP 15324582 U JP15324582 U JP 15324582U JP 15324582 U JP15324582 U JP 15324582U JP S5958417 U JPS5958417 U JP S5958417U
- Authority
- JP
- Japan
- Prior art keywords
- lens
- object side
- curvature
- radius
- focal length
- 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
Landscapes
- Lenses (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図は近接撮影用大口径レンズの第１実−例 ゛レン
ズ構成図、第２図は第１実施例における収差図、第３図
は像高１０ 、’７ｍｍに規格化した時の空間伝達関数
（Ｍ、Ｔ、Ｆ）曲線図、第４図は第２実施例レンズ構成
図、第５図は第２実施例における収差図、第６図は第２
実施例における空間伝達間 □数曲線図である。
１．２・・・凹メニスカスレンズ、３・・・両凸レヌッ
ズ又は凸メニスカスレンズ、４・・・両凸レンズ、５
、・・・両凹レンズ、■・・・第ルンズ群、
■・・・第２レンズ群、■・・・第３レンズ群、ｒ・・
・曲率半径、ｎ・・・屈折率、ν・・・アツベ数。Figure 1 shows the first practical example of a large-diameter lens for close-up photography, Figure 2 is an aberration diagram of the first example, and Figure 3 is the space when the image height is 10 and normalized to 7mm. Transfer function (M, T, F) curve diagram, Figure 4 is a diagram of the lens configuration of the second embodiment, Figure 5 is an aberration diagram of the second embodiment, and Figure 6 is the lens configuration diagram of the second embodiment.
It is a number curve diagram between spatial transmission in an example. 1.2...Concave meniscus lens, 3...Biconvex lens or convex meniscus lens, 4...Biconvex lens, 5
,...Biconcave lens,■...Luns group,
■...Second lens group, ■...Third lens group, r...
- Radius of curvature, n...Refractive index, ν...Atsube number.
Claims (1)
ズ群、正の焦点距離を有する第２レンズ群、正の
焦点距離を有する第３レンズ群を配したレンズ系であっ
て、上記第ルンズ群は物体側より順に物体側に凸面を向
けた２枚の凹メニスカスレンズの第ルンズと第２レンズ
及び両凸レンズの第３レンズ又は物体側に凸面を向けた
凸メカニカスレンズあ第３レンズにより構成し、上記第
２レンズ群は物体側より順に両凸レンズの第４レンズと
両凹レンズの第５レンズにより構成して、 全レンズ系の合成焦点距離をｆ１第４レンズの物体側の
曲率半径をｒ７、第４レンズの像側の曲率半径をｒ８、
第５レンズの物体側の曲率半径をｒ９、第４レンズのｄ
線屈曲率をｎ４、第２レンズの像側面から第３レンズの
物体側面までの距離をｄ、としたとき、 （１） ０ 、６ｆ＜ｒ７＜０ 、９ｆ（２） ０
−９＜ｒ８／ｒ９＜１ 、４（３１ｎ４〉１ 、７ （４） ｄ、＞０．１８ｆ なる条件を満足する近搗撮影用大口径レンズ。 ゛[Claims for Utility Model Registration] The first series having a negative focal length in order from the object side.
The lens system includes a lens group, a second lens group having a positive focal length, and a third lens group having a positive focal length, the lens group having a convex surface facing the object side in order from the object side. The second lens group consists of a concave meniscus lens, a second lens, and a biconvex third lens, or a convex mechanical lens with a convex surface facing the object side. Consisting of a fourth lens that is a convex lens and a fifth lens that is a biconcave lens, the combined focal length of the entire lens system is f1, the radius of curvature on the object side of the fourth lens is r7, the radius of curvature on the image side of the fourth lens is r8,
The radius of curvature on the object side of the fifth lens is r9, and the radius of curvature on the object side is r9, and d of the fourth lens.
When the linear refractive index is n4 and the distance from the image side surface of the second lens to the object side surface of the third lens is d, (1) 0 , 6f<r7<0 , 9f(2) 0
A large aperture lens for Konto photography that satisfies the following conditions: -9<r8/r9<1, 4 (31n4>1, 7 (4) d, >0.18f.゛
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15324582U JPS5958417U (en) | 1982-10-12 | 1982-10-12 | Large aperture lens for close-up photography |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15324582U JPS5958417U (en) | 1982-10-12 | 1982-10-12 | Large aperture lens for close-up photography |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5958417U true JPS5958417U (en) | 1984-04-16 |
| JPS6239366Y2 JPS6239366Y2 (en) | 1987-10-07 |
Family
ID=30339097
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15324582U Granted JPS5958417U (en) | 1982-10-12 | 1982-10-12 | Large aperture lens for close-up photography |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5958417U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03281164A (en) * | 1990-03-29 | 1991-12-11 | Tokyo Gas Co Ltd | Self-running type pipe inner surface polishing and measuring device |
-
1982
- 1982-10-12 JP JP15324582U patent/JPS5958417U/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03281164A (en) * | 1990-03-29 | 1991-12-11 | Tokyo Gas Co Ltd | Self-running type pipe inner surface polishing and measuring device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6239366Y2 (en) | 1987-10-07 |
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