JPS6343349U - - Google Patents
Info
- Publication number
- JPS6343349U JPS6343349U JP13635186U JP13635186U JPS6343349U JP S6343349 U JPS6343349 U JP S6343349U JP 13635186 U JP13635186 U JP 13635186U JP 13635186 U JP13635186 U JP 13635186U JP S6343349 U JPS6343349 U JP S6343349U
- Authority
- JP
- Japan
- Prior art keywords
- signal
- digital
- generating
- converter
- multiplication type
- 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
- 201000009310 astigmatism Diseases 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 2
Description
第１図は本考案の一実施例として示した非点補
正信号発生装置のブロツク図、第２図は従来の非
点補正信号発生装置の概略図である。
１０ａ……角度操作器、１０ｂ……振幅操作器
、１１ａ，１１ｂ……アツプダウンカウンタ、１
２，１３……リードオンリメモリ、１４，１５…
…乗算型ＤＡ変換器、１６……ＤＡ変換器、１７
ａ，１７ｂ……アンプ。
FIG. 1 is a block diagram of an astigmatism correction signal generating apparatus shown as an embodiment of the present invention, and FIG. 2 is a schematic diagram of a conventional astigmatism correction signal generating apparatus. 10a...Angle manipulator, 10b...Amplitude manipulator, 11a, 11b...Up-down counter, 1
2, 13...Read only memory, 14, 15...
...Multiplication type DA converter, 16...DA converter, 17
a, 17b...Amplifier.
Claims (1)
該デジタル信号に基づいて該角度の正弦値及び余
弦値を表わすデジタル信号を発生する回路、振幅
に対応したデジタル信号を発生する手段、該デジ
タル振幅信号をアナログ信号に変換する為のＤＡ
変換器、上記正弦信号と上記アナログ信号が供給
される第１の乗算型ＤＡ変換器、上記余弦信号と
上記アナログ信号が供給される第２の乗算型ＤＡ
変換器、及び該第１、第２の乗算型ＤＡ変換器の
出力信号に基づいて非点補正用磁極又は電極を付
勢する手段を具備した非点補正信号発生装置。 means for generating a digital signal corresponding to the angle;
A circuit for generating digital signals representing the sine and cosine values of the angle based on the digital signal, means for generating a digital signal corresponding to the amplitude, and a DA for converting the digital amplitude signal into an analog signal.
a first multiplication type DA converter to which the sine signal and the analog signal are supplied; a second multiplication type DA converter to which the cosine signal and the analog signal are supplied;
An astigmatism correction signal generating device comprising a converter and means for energizing an astigmatism correction magnetic pole or electrode based on output signals of the first and second multiplication type DA converters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13635186U JPS6343349U (en) | 1986-09-05 | 1986-09-05 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13635186U JPS6343349U (en) | 1986-09-05 | 1986-09-05 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6343349U true JPS6343349U (en) | 1988-03-23 |
Family
ID=31039378
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13635186U Pending JPS6343349U (en) | 1986-09-05 | 1986-09-05 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6343349U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59119662A (en) * | 1982-12-27 | 1984-07-10 | Jeol Ltd | Astigmatism correction device |
-
1986
- 1986-09-05 JP JP13635186U patent/JPS6343349U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59119662A (en) * | 1982-12-27 | 1984-07-10 | Jeol Ltd | Astigmatism correction device |
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