JPS6489041A - Focus controller - Google Patents

Focus controller

Info

Publication number
JPS6489041A
JPS6489041A JP24430987A JP24430987A JPS6489041A JP S6489041 A JPS6489041 A JP S6489041A JP 24430987 A JP24430987 A JP 24430987A JP 24430987 A JP24430987 A JP 24430987A JP S6489041 A JPS6489041 A JP S6489041A
Authority
JP
Japan
Prior art keywords
light beam
recording medium
information recording
refracting bodies
plural
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
Application number
JP24430987A
Other languages
English (en)
Inventor
Takeshi Ishika
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Corp
Toshiba Intelligent Technology Co Ltd
Original Assignee
Toshiba Corp
Toshiba Intelligent Technology Co Ltd
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 by Toshiba Corp, Toshiba Intelligent Technology Co Ltd filed Critical Toshiba Corp
Priority to JP24430987A priority Critical patent/JPS6489041A/ja
Publication of JPS6489041A publication Critical patent/JPS6489041A/ja
Pending legal-status Critical Current

Links

Landscapes

  • Optical Recording Or Reproduction (AREA)
  • Automatic Focus Adjustment (AREA)
JP24430987A 1987-09-30 1987-09-30 Focus controller Pending JPS6489041A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP24430987A JPS6489041A (en) 1987-09-30 1987-09-30 Focus controller

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP24430987A JPS6489041A (en) 1987-09-30 1987-09-30 Focus controller

Publications (1)

Publication Number Publication Date
JPS6489041A true JPS6489041A (en) 1989-04-03

Family

ID=17116817

Family Applications (1)

Application Number Title Priority Date Filing Date
JP24430987A Pending JPS6489041A (en) 1987-09-30 1987-09-30 Focus controller

Country Status (1)

Country Link
JP (1) JPS6489041A (ja)

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