JPH0384544U - - Google Patents
Info
- Publication number
- JPH0384544U JPH0384544U JP14266189U JP14266189U JPH0384544U JP H0384544 U JPH0384544 U JP H0384544U JP 14266189 U JP14266189 U JP 14266189U JP 14266189 U JP14266189 U JP 14266189U JP H0384544 U JPH0384544 U JP H0384544U
- Authority
- JP
- Japan
- Prior art keywords
- shaped
- cup
- ring
- inner diameter
- permanent magnet
- 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
- 238000010586 diagram Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
Description
第１図は、本考案の一実施例であるフオーカス
マグネツトの縦断面図。第２図は、リング状永久
磁石内径寸法とカツプ状磁性体との比と外周部漏
洩磁束との関係を示す図である。第３図は、従来
技術により製造されたフオーカスマグネツトの縦
断面図。
１…リング状永久磁石、２…カツプ状磁性体、
３…カツプ状磁性体。
FIG. 1 is a longitudinal sectional view of a focus magnet that is an embodiment of the present invention. FIG. 2 is a diagram showing the relationship between the ratio of the inner diameter of the ring-shaped permanent magnet to the cup-shaped magnetic body and the leakage magnetic flux at the outer circumference. FIG. 3 is a longitudinal sectional view of a focus magnet manufactured by the prior art. 1... Ring-shaped permanent magnet, 2... Cup-shaped magnetic body,
3...Cup-shaped magnetic material.
Claims (1)
され、同極性の磁極が対向する磁界レンズ方式の
フオーカスマグネツトにおいて、前記リング状永
久磁石の内径寸法Ｄ１と前記カツプ状の磁性体の
内径寸法Ｄ２との比（Ｄ１／Ｄ２）を０．８５〜
０．９９の範囲としたことを特徴とするフオーカ
スマグネツト。 In a magnetic field lens type focus magnet in which a cup-shaped magnetic body is fixed to a ring-shaped permanent magnet and magnetic poles of the same polarity face each other, the inner diameter dimension D1 of the ring-shaped permanent magnet and the inner diameter dimension of the cup-shaped magnetic body The ratio with D2 (D1/D2) is 0.85~
A focus magnet characterized by having a range of 0.99.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14266189U JPH064525Y2 (en) | 1989-12-09 | 1989-12-09 | Focus magnet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14266189U JPH064525Y2 (en) | 1989-12-09 | 1989-12-09 | Focus magnet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0384544U true JPH0384544U (en) | 1991-08-27 |
| JPH064525Y2 JPH064525Y2 (en) | 1994-02-02 |
Family
ID=31689480
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14266189U Expired - Lifetime JPH064525Y2 (en) | 1989-12-09 | 1989-12-09 | Focus magnet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH064525Y2 (en) |
-
1989
- 1989-12-09 JP JP14266189U patent/JPH064525Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH064525Y2 (en) | 1994-02-02 |
Similar Documents
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |