JPS5963329U - Objective lenses for magneto-optical recording and reproduction - Google Patents
Objective lenses for magneto-optical recording and reproductionInfo
- Publication number
- JPS5963329U JPS5963329U JP15702282U JP15702282U JPS5963329U JP S5963329 U JPS5963329 U JP S5963329U JP 15702282 U JP15702282 U JP 15702282U JP 15702282 U JP15702282 U JP 15702282U JP S5963329 U JPS5963329 U JP S5963329U
- Authority
- JP
- Japan
- Prior art keywords
- lens
- light source
- source side
- magneto
- reproduction
- 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図は光磁気記録用及び再生用対物レンズのレンズ構
成図、第２図は波面収差図、第３図は球面収差・正弦条
件・非点収差・歪曲収差の図である。
１・・・凹メニスカスレンズ、２・・・両凸レンズ、３
゜１・・・凸メニスカスレンズ、ｆ・・・焦点距離、ｒ
・・・曲率半径。FIG. 1 is a lens configuration diagram of a magneto-optical recording and reproducing objective lens, FIG. 2 is a wavefront aberration diagram, and FIG. 3 is a diagram of spherical aberration, sine conditions, astigmatism, and distortion aberration. 1...Concave meniscus lens, 2...Biconvex lens, 3
゜1... Convex meniscus lens, f... Focal length, r
···curvature radius.
Claims (1)
ズの第ルンズと、両凸レンズの第２レンズと、凸面を光
源側に向けた凸メニスカスレンズの第３レンズと、同じ
く凸面を光源側に向けた凸メニスカスレンズの第４レン
ズを配したレンズ系であって、 全系のレンズ系の合成焦点距離をｆ１第ルンズの焦点距
離をｆ、第４レンズの光源側の曲率半径をｒとしたとき
、 （１） ’ １．６０＜ ｌ ｆｌ ＋ ／ｆ＜４．４
０＜２） ０．５５＜ｒ７／ｆ＜１．３０の条件を満
足する光磁気記録及び再生用対物レン ズ。[Scope of Claim for Utility Model Registration] In order from the light source side, a concave meniscus lens with its convex surface facing the light source side, a biconvex second lens, and a convex meniscus lens third lens with its convex surface facing the light source side. , is a lens system including a fourth lens, which is also a convex meniscus lens with its convex surface facing the light source side, where the composite focal length of the entire lens system is f1, the focal length of the fourth lens is f, and the fourth lens is on the light source side. When the radius of curvature of is r, (1) '1.60< l fl + /f<4.4
0<2) An objective lens for magneto-optical recording and reproduction that satisfies the condition of 0.55<r7/f<1.30.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15702282U JPS5963329U (en) | 1982-10-19 | 1982-10-19 | Objective lenses for magneto-optical recording and reproduction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15702282U JPS5963329U (en) | 1982-10-19 | 1982-10-19 | Objective lenses for magneto-optical recording and reproduction |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5963329U true JPS5963329U (en) | 1984-04-26 |
| JPS6320972Y2 JPS6320972Y2 (en) | 1988-06-10 |
Family
ID=30346313
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15702282U Granted JPS5963329U (en) | 1982-10-19 | 1982-10-19 | Objective lenses for magneto-optical recording and reproduction |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5963329U (en) |
-
1982
- 1982-10-19 JP JP15702282U patent/JPS5963329U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6320972Y2 (en) | 1988-06-10 |
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