JPH0310311U - - Google Patents

Info

Publication number
JPH0310311U
JPH0310311U JP2641890U JP2641890U JPH0310311U JP H0310311 U JPH0310311 U JP H0310311U JP 2641890 U JP2641890 U JP 2641890U JP 2641890 U JP2641890 U JP 2641890U JP H0310311 U JPH0310311 U JP H0310311U
Authority
JP
Japan
Prior art keywords
objective lens
detection means
optical
focusing
axis direction
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
Application number
JP2641890U
Other languages
English (en)
Japanese (ja)
Other versions
JPH0643848Y2 (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 JP1990026418U priority Critical patent/JPH0643848Y2/ja
Publication of JPH0310311U publication Critical patent/JPH0310311U/ja
Application granted granted Critical
Publication of JPH0643848Y2 publication Critical patent/JPH0643848Y2/ja
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

  • Moving Of The Head For Recording And Reproducing By Optical Means (AREA)
JP1990026418U 1990-03-15 1990-03-15 光集束位置制御装置 Expired - Lifetime JPH0643848Y2 (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1990026418U JPH0643848Y2 (ja) 1990-03-15 1990-03-15 光集束位置制御装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1990026418U JPH0643848Y2 (ja) 1990-03-15 1990-03-15 光集束位置制御装置

Publications (2)

Publication Number Publication Date
JPH0310311U true JPH0310311U (cs) 1991-01-31
JPH0643848Y2 JPH0643848Y2 (ja) 1994-11-14

Family

ID=31529312

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1990026418U Expired - Lifetime JPH0643848Y2 (ja) 1990-03-15 1990-03-15 光集束位置制御装置

Country Status (1)

Country Link
JP (1) JPH0643848Y2 (cs)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5189444A (cs) * 1974-12-23 1976-08-05
JPS5257803A (en) * 1975-10-31 1977-05-12 Thomson Brandt Optical reader

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5189444A (cs) * 1974-12-23 1976-08-05
JPS5257803A (en) * 1975-10-31 1977-05-12 Thomson Brandt Optical reader

Also Published As

Publication number Publication date
JPH0643848Y2 (ja) 1994-11-14

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