JPH0138564Y2 - - Google Patents

Info

Publication number
JPH0138564Y2
JPH0138564Y2 JP7272183U JP7272183U JPH0138564Y2 JP H0138564 Y2 JPH0138564 Y2 JP H0138564Y2 JP 7272183 U JP7272183 U JP 7272183U JP 7272183 U JP7272183 U JP 7272183U JP H0138564 Y2 JPH0138564 Y2 JP H0138564Y2
Authority
JP
Japan
Prior art keywords
light
lens
collimating lens
light source
distance
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.)
Expired
Application number
JP7272183U
Other languages
English (en)
Japanese (ja)
Other versions
JPS59178613U (ja
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed filed Critical
Priority to JP7272183U priority Critical patent/JPS59178613U/ja
Publication of JPS59178613U publication Critical patent/JPS59178613U/ja
Application granted granted Critical
Publication of JPH0138564Y2 publication Critical patent/JPH0138564Y2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Microscoopes, Condenser (AREA)
  • Optical Recording Or Reproduction (AREA)
  • Optical Head (AREA)
JP7272183U 1983-05-16 1983-05-16 光ヘツド用集光光学系 Granted JPS59178613U (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7272183U JPS59178613U (ja) 1983-05-16 1983-05-16 光ヘツド用集光光学系

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7272183U JPS59178613U (ja) 1983-05-16 1983-05-16 光ヘツド用集光光学系

Publications (2)

Publication Number Publication Date
JPS59178613U JPS59178613U (ja) 1984-11-29
JPH0138564Y2 true JPH0138564Y2 (en, 2012) 1989-11-17

Family

ID=30202855

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7272183U Granted JPS59178613U (ja) 1983-05-16 1983-05-16 光ヘツド用集光光学系

Country Status (1)

Country Link
JP (1) JPS59178613U (en, 2012)

Also Published As

Publication number Publication date
JPS59178613U (ja) 1984-11-29

Similar Documents

Publication Publication Date Title
US4571712A (en) Beam alignment signal processing
US4464741A (en) Optical focusing-error detection device
US5353274A (en) Beam diameter expansion of a multi-beam optical information system
JP2003045066A (ja) 光ヘッドおよび光ディスク装置
JP2901728B2 (ja) 光ヘッド及びそれを用いた情報記録再生装置
JPH07147020A (ja) 複数ビーム光ヘッド
JPH0138564Y2 (en, 2012)
US4633454A (en) Optical information pickup apparatus
JPS59231736A (ja) フォーカスおよびトラッキング誤差検出装置
JPH0534731B2 (en, 2012)
JP2933325B2 (ja) 光学式情報記録再生装置用光学系の波面収差測定装置
JP2636245B2 (ja) 光磁気記憶用光ヘッド
JPS6093647A (ja) 光学式デイスクプレ−ヤの再生用光学系制御機構
JPH0449535A (ja) 光学式読取り装置
JP2795233B2 (ja) 光ヘッド装置
JPH02292735A (ja) フォーカス検出装置
JP2912052B2 (ja) 焦点検出装置
JPS59227044A (ja) 記録ビ−ム監視装置
JP2946998B2 (ja) 光ヘッド装置
JPS60205839A (ja) 光学ヘツド
JPH0213374B2 (en, 2012)
JPH077518B2 (ja) 自動焦点調整装置
JPS58182135A (ja) 光情報処理装置
JPS61184740A (ja) 光ピツクアツプ装置
JPH0395731A (ja) 光ピックアップ用スポット位置エラー検出装置