JPH0175211U - - Google Patents
Info
- Publication number
- JPH0175211U JPH0175211U JP1987170483U JP17048387U JPH0175211U JP H0175211 U JPH0175211 U JP H0175211U JP 1987170483 U JP1987170483 U JP 1987170483U JP 17048387 U JP17048387 U JP 17048387U JP H0175211 U JPH0175211 U JP H0175211U
- Authority
- JP
- Japan
- Prior art keywords
- lens
- biconcave
- fno
- object side
- positive
- 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)
Description
第１図は、本考案撮影レンズの実施例を示すレ
ンズ構成図である。第２図は、２０００mmの曲率
半径、中心厚１０．７mmの保護ガラスを持つＣＲ
Ｔを、撮影倍率０．２８２４倍で撮影した時の諸
収差図である。
FIG. 1 is a lens configuration diagram showing an embodiment of the photographic lens of the present invention. Figure 2 shows a CR with a radius of curvature of 2000 mm and a protective glass with a center thickness of 10.7 mm.
It is a diagram of various aberrations when T is photographed at a photographing magnification of 0.2824 times.
Claims (1)
カスレンズの第１レンズと、両凹レンズの第２レ
ンズと、両凹レンズの第３レンズと、両凸レンズ
の第４レンズとから成り、前記第３、第４レンズ
を貼り合せ正レンズとした３群４枚構成レンズで
あつて、 ｆ：焦点距離 ＦＮＯ：口径比 Ｙ：像高 ｆＢ：バツクフオーカス ｒ：レンズ各面の曲率半径 ｄ：レンズ厚又は空気間隔 ｎｄ：各レンズのｄ線の屈折率 νｄ：各レンズのアツベ数 とするとき、以下の諸元を有することを特徴とす
る撮影レンズ。 ｆ＝５０．６７３ ＦＮＯ＝１：５．０ ｙ＝±１９．４ ｆＢ＝４２．６７３ 面ＮＯ． ｒ ｄ ｎｄ ｒｄ １ １９．４６５ ５．００ １．８０６１０
４０．９ ２ ４１３．３０２ ２．８２ ３ −３３．７５０ １．００ １．８０５１８
２５．４ ４ １７．６７７ ２．７０ ５ −７３．４００ １．５０ １．５４８１４
４５．８ ６ ２２．７１９ ４．５０ １．８０６１０
４０．９ ７ −２２．７１９[Claims for Utility Model Registration] In order from the object side, a first lens that is a positive meniscus lens with its convexity facing the object side, a second lens that is a biconcave lens, a third lens that is a biconcave lens, and a fourth lens that is a biconcave lens. It is a lens consisting of 4 elements in 3 groups, with the third and fourth lenses bonded together to form a positive lens, where f: focal length, FNO: aperture ratio, Y: image height, fB: back focus, and r: each lens surface. Radius of curvature d: Lens thickness or air gap n d : D-line refractive index of each lens ν d : Atsube number of each lens A photographic lens characterized by having the following specifications. f=50.673 FNO=1:5.0 y=±19.4 fB=42.673 Surface NO. r d nd rd 1 19.465 5.00 1.80610
40.9 2 413.302 2.82 3 -33.750 1.00 1.80518
25.4 4 17.677 2.70 5 -73.400 1.50 1.54814
45.8 6 22.719 4.50 1.80610
40.9 7 -22.719
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17048387U JPH0414732Y2 (en) | 1987-11-07 | 1987-11-07 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17048387U JPH0414732Y2 (en) | 1987-11-07 | 1987-11-07 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0175211U true JPH0175211U (en) | 1989-05-22 |
| JPH0414732Y2 JPH0414732Y2 (en) | 1992-04-02 |
Family
ID=31461470
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17048387U Expired JPH0414732Y2 (en) | 1987-11-07 | 1987-11-07 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0414732Y2 (en) |
-
1987
- 1987-11-07 JP JP17048387U patent/JPH0414732Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0414732Y2 (en) | 1992-04-02 |
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