JPS5573934A - Reader for optical information - Google Patents

Reader for optical information

Info

Publication number
JPS5573934A
JPS5573934A JP14298178A JP14298178A JPS5573934A JP S5573934 A JPS5573934 A JP S5573934A JP 14298178 A JP14298178 A JP 14298178A JP 14298178 A JP14298178 A JP 14298178A JP S5573934 A JPS5573934 A JP S5573934A
Authority
JP
Japan
Prior art keywords
piezoelectric element
wobbling
cylinder
reader
slit
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
JP14298178A
Other languages
Japanese (ja)
Inventor
Yoshiharu Tanaka
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.)
Mansei Kogyo KK
Original Assignee
Mansei Kogyo KK
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 Mansei Kogyo KK filed Critical Mansei Kogyo KK
Priority to JP14298178A priority Critical patent/JPS5573934A/en
Publication of JPS5573934A publication Critical patent/JPS5573934A/en
Pending legal-status Critical Current

Links

Landscapes

  • Automatic Focus Adjustment (AREA)
  • Optical Recording Or Reproduction (AREA)

Abstract

PURPOSE: To miniaturize a reader by carrying wobbling out by using a piezoelectric element which vibrates when applied with a voltage.
CONSTITUTION: Laser 1, slit 3, collimator lens 4, and focusing lens 5 are installed in cylindrical body 9, which consists of upper cylinder 9a and lower cylinder 9b joined by ring piezoelectric element 10. On the internal wall of upper cylinder 9a, two focusing lenses 5 are held by piezoelectric elements 11a and 11b. In the center of the reverse of F cylinder 9b, semiconductor laser 1 is fixed and on it, slit 8 and collimator lens 4 are also fixed in sequence. Once a wobbling signal is applied to piezoelectric element 10, piezoelectric element 10 contracts at frequency R2 in the light axis direction of focusing lens 5 and fine spot 7 moves in a direction perpendicular to recording disk 6. In this way, wobbling is done by piezoelectric elements, so that while amplitude vibration characteristics of micron order are excellent, the unit can be miniaturized.
COPYRIGHT: (C)1980,JPO&Japio
JP14298178A 1978-11-20 1978-11-20 Reader for optical information Pending JPS5573934A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14298178A JPS5573934A (en) 1978-11-20 1978-11-20 Reader for optical information

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14298178A JPS5573934A (en) 1978-11-20 1978-11-20 Reader for optical information

Publications (1)

Publication Number Publication Date
JPS5573934A true JPS5573934A (en) 1980-06-04

Family

ID=15328144

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14298178A Pending JPS5573934A (en) 1978-11-20 1978-11-20 Reader for optical information

Country Status (1)

Country Link
JP (1) JPS5573934A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2519458A1 (en) * 1981-11-04 1983-07-08 Sony Corp OPTICAL HEAD, IN PARTICULAR FOR READING INFORMATION

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2519458A1 (en) * 1981-11-04 1983-07-08 Sony Corp OPTICAL HEAD, IN PARTICULAR FOR READING INFORMATION

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