JPS5715260A - Disk deformation detection system - Google Patents

Disk deformation detection system

Info

Publication number
JPS5715260A
JPS5715260A JP8662980A JP8662980A JPS5715260A JP S5715260 A JPS5715260 A JP S5715260A JP 8662980 A JP8662980 A JP 8662980A JP 8662980 A JP8662980 A JP 8662980A JP S5715260 A JPS5715260 A JP S5715260A
Authority
JP
Japan
Prior art keywords
disk
detecting
deformation
detection system
deformation detection
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
JP8662980A
Other languages
Japanese (ja)
Inventor
Hiroshi Kitani
Noriya Kaneda
Nobuyuki Fujimoto
Yasumitsu Mizoguchi
Hatsuo Takahashi
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP8662980A priority Critical patent/JPS5715260A/en
Publication of JPS5715260A publication Critical patent/JPS5715260A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To prevent a recording and reproducing head and a disk from breaking by detecting the deformation of the disk by detecting the reflected light of light incident to a disk surface.
CONSTITUTION: A disk 1 is coupled with a driving motor 2 via a hub 2 to be driven and a recording and reproducing head 4 records and reproduces information on and from the surface of the disk. A fault detector 5 is provided near the outer circumferential surface of the disk to detect variations in the quantity of the reflected light of light incident to the surface of the disk 1, thereby detecting the extent of the deformation of the disk 1. When the extent of this deformation exceeds a prescribed value, the rotation of the driving motor 2 is stopped.
COPYRIGHT: (C)1982,JPO&Japio
JP8662980A 1980-06-27 1980-06-27 Disk deformation detection system Pending JPS5715260A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8662980A JPS5715260A (en) 1980-06-27 1980-06-27 Disk deformation detection system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8662980A JPS5715260A (en) 1980-06-27 1980-06-27 Disk deformation detection system

Publications (1)

Publication Number Publication Date
JPS5715260A true JPS5715260A (en) 1982-01-26

Family

ID=13892313

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8662980A Pending JPS5715260A (en) 1980-06-27 1980-06-27 Disk deformation detection system

Country Status (1)

Country Link
JP (1) JPS5715260A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5972676A (en) * 1982-10-18 1984-04-24 Matsushita Electric Ind Co Ltd Disc recorder and reproducer
JPH03224171A (en) * 1990-01-30 1991-10-03 Kenwood Corp Method for discriminating unclamped state of disk

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5972676A (en) * 1982-10-18 1984-04-24 Matsushita Electric Ind Co Ltd Disc recorder and reproducer
JPH03224171A (en) * 1990-01-30 1991-10-03 Kenwood Corp Method for discriminating unclamped state of disk

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