JPS558665A - Flexible magnetic disc device - Google Patents

Flexible magnetic disc device

Info

Publication number
JPS558665A
JPS558665A JP8168378A JP8168378A JPS558665A JP S558665 A JPS558665 A JP S558665A JP 8168378 A JP8168378 A JP 8168378A JP 8168378 A JP8168378 A JP 8168378A JP S558665 A JPS558665 A JP S558665A
Authority
JP
Japan
Prior art keywords
disc
sent
color
different
flexible
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
JP8168378A
Other languages
Japanese (ja)
Other versions
JPS6138537B2 (en
Inventor
Eiichi Nanba
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP8168378A priority Critical patent/JPS558665A/en
Publication of JPS558665A publication Critical patent/JPS558665A/en
Publication of JPS6138537B2 publication Critical patent/JPS6138537B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Automatic Disk Changers (AREA)

Abstract

PURPOSE: To make an access operation accurate and rapid by inserting a different- color flexible disc for every several discs and detecting optically the slide movement of the edge face.
CONSTITUTION: For example, when selection command 14 of flexible magnetic disc 10-c is sent to photoelectric unit driving part 16-a, a driving signal to step motor 12- a is issued from this. Optical system 12-c approaches different-color disc 10-b nearest to specific disc 10-c, and the real image of the edge face of different-color disc 10-b is projected onto photoelectric conversion unit 12-f through optical lens 12-e. Signals of this image are processed by slide movement detection circuit 12-g and are sent to actuator control circuit 16-b, thereby peforming position calculation. The calculation result is sent to actuator 20, and splitter 18 is moved to the position of specific flexible disc 10-c.
COPYRIGHT: (C)1980,JPO&Japio
JP8168378A 1978-07-04 1978-07-04 Flexible magnetic disc device Granted JPS558665A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8168378A JPS558665A (en) 1978-07-04 1978-07-04 Flexible magnetic disc device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8168378A JPS558665A (en) 1978-07-04 1978-07-04 Flexible magnetic disc device

Publications (2)

Publication Number Publication Date
JPS558665A true JPS558665A (en) 1980-01-22
JPS6138537B2 JPS6138537B2 (en) 1986-08-29

Family

ID=13753148

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8168378A Granted JPS558665A (en) 1978-07-04 1978-07-04 Flexible magnetic disc device

Country Status (1)

Country Link
JP (1) JPS558665A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55158265U (en) * 1979-05-03 1980-11-13
JPS59112462A (en) * 1982-12-20 1984-06-28 Hitachi Ltd Page detecting mechanism of flexible magnetic disk device
JPS63200355A (en) * 1986-10-29 1988-08-18 ドイチエ・トムソン−ブラント・ゲゼルシヤフト・ミツト・ベシユレンクテル・ハフツング Cd disc automatic changer

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55158265U (en) * 1979-05-03 1980-11-13
JPS59112462A (en) * 1982-12-20 1984-06-28 Hitachi Ltd Page detecting mechanism of flexible magnetic disk device
JPS6321275B2 (en) * 1982-12-20 1988-05-06 Hitachi Ltd
JPS63200355A (en) * 1986-10-29 1988-08-18 ドイチエ・トムソン−ブラント・ゲゼルシヤフト・ミツト・ベシユレンクテル・ハフツング Cd disc automatic changer

Also Published As

Publication number Publication date
JPS6138537B2 (en) 1986-08-29

Similar Documents

Publication Publication Date Title
JPS57181436A (en) Optical disc device
AU533655B2 (en) Radial movement optical reader for video disc
EP0346121A3 (en) Optical pickup head having a hologram-associated objective lens and optical information processing apparatus using the same
JPS575019A (en) Focus controller
JPS57181482A (en) Disc device
FR2450014A1 (en) SERVO CIRCUIT FOR MAGNETOSCOPE
TW363182B (en) Positioning apparatus for optical disks
JPS558665A (en) Flexible magnetic disc device
DE3564633D1 (en) Start-control methods and circuits for optical disc play-back systems
JPS5398802A (en) Optical reproducer
JPS57147162A (en) Recorder and reproducer
JPS533305A (en) Optical reproduction device
EP0441969A4 (en) Seek circuit of optical disk
JPS575018A (en) Focus controller
JPS53132308A (en) Focus controller of optical reproducer
EP0811972A3 (en) Optical disk recording apparatus
EP0828384A3 (en) Controlling the movable lens of an image pickup apparatus
JPS5468255A (en) Laser recorder
JPS5417038A (en) Optical scanning system
JPS57164474A (en) Digital audio disk player
JPS5514568A (en) Release unit for locked groove
JPS57120269A (en) Disk recording and reproducing device
JPS52152705A (en) Optical reproducing system
JPS5328404A (en) Optical information re producer
JPS643821A (en) Optical recording and reproducing device