JPS55157134A - Information groove tracing unit - Google Patents

Information groove tracing unit

Info

Publication number
JPS55157134A
JPS55157134A JP6144579A JP6144579A JPS55157134A JP S55157134 A JPS55157134 A JP S55157134A JP 6144579 A JP6144579 A JP 6144579A JP 6144579 A JP6144579 A JP 6144579A JP S55157134 A JPS55157134 A JP S55157134A
Authority
JP
Japan
Prior art keywords
signal
rotation
circuit
inputted
tracks
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
JP6144579A
Other languages
Japanese (ja)
Other versions
JPS6346496B2 (en
Inventor
Takeshi Maeda
Seiji Yonezawa
Toshio Sugiyama
Ryuichi Koike
Kiichi Kamiyanagi
Kazuo Shigematsu
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 JP6144579A priority Critical patent/JPS55157134A/en
Publication of JPS55157134A publication Critical patent/JPS55157134A/en
Publication of JPS6346496B2 publication Critical patent/JPS6346496B2/ja
Granted legal-status Critical Current

Links

Abstract

PURPOSE: To trace easily and accurately information tracks recorded by the optical system and so on, by zugzagging bits minutely during a certain period and by avoiding superposition onto the zigzagging period of adjacent tracks.
CONSTITUTION: When frame pulse FP is inputted to FF25, FF25 repeats "0" and "1" alternately each time disc 10 rotates once, and this output is inputted to one end of exclusive OR circuit 26, however, output 7' from frequency dividing circuit 23 is inputted to the other end, and therefore, the phase of output signal 7 of circuit 26 is inverted at the N-th rotation for the (N+1)-th rotation. This signal 7 is used as the gate signal of gate circuit 5; and when the output signal of frequency dividing circuit 22 is inputted to circuit 5, output signal 12 has phases, where the signal of frequency f1 appears at the N-th rotation and the (N+1)-th rotation, shifted alternately. When a minute spot on disc 10 is deflected in the radius direction slightly by optical deflector 4 according to this signal 12, tracks having zigzag period which are discontinuous in the rotation direction and are not superposed onto them of adjacent tracks in the radius direction are formed on the disc. Consequently, information recording tracks can be traced accurately.
COPYRIGHT: (C)1980,JPO&Japio
JP6144579A 1979-05-21 1979-05-21 Information groove tracing unit Granted JPS55157134A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6144579A JPS55157134A (en) 1979-05-21 1979-05-21 Information groove tracing unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6144579A JPS55157134A (en) 1979-05-21 1979-05-21 Information groove tracing unit

Related Child Applications (1)

Application Number Title Priority Date Filing Date
JP62093033A Division JPS6387616A (en) 1987-04-17 1987-04-17 Information recording medium

Publications (2)

Publication Number Publication Date
JPS55157134A true JPS55157134A (en) 1980-12-06
JPS6346496B2 JPS6346496B2 (en) 1988-09-16

Family

ID=13171261

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6144579A Granted JPS55157134A (en) 1979-05-21 1979-05-21 Information groove tracing unit

Country Status (1)

Country Link
JP (1) JPS55157134A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6231029A (en) * 1985-07-30 1987-02-10 オプテイカル　ストレツジ　インタ−ナシヨナル−ユ−エス Record carrier for data memory
JPS6233338A (en) * 1985-07-30 1987-02-13 オプテイカル　ストレツジ　インタ−ナシヨナル−ユ−エス Record carrier for data memory
JPS6233339A (en) * 1985-07-30 1987-02-13 オプテイカル　ストレツジ　インタ−ナシヨナル−ユ−エス Record carrier for data memory

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0520219Y2 (en) * 1988-02-16 1993-05-26
JPH01171268U (en) * 1988-05-24 1989-12-04
JPH01177572U (en) * 1988-05-26 1989-12-19
JPH0223864U (en) * 1988-08-04 1990-02-16
JPH02145854A (en) * 1988-11-25 1990-06-05 Futaba Shokai:Kk Cloth radiating far-infrared beams and method for warming human bodies using the same
JPH0378004U (en) * 1989-11-30 1991-08-07

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5068413A (en) * 1973-10-17 1975-06-07

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5068413A (en) * 1973-10-17 1975-06-07

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6231029A (en) * 1985-07-30 1987-02-10 オプテイカル　ストレツジ　インタ−ナシヨナル−ユ−エス Record carrier for data memory
JPS6233338A (en) * 1985-07-30 1987-02-13 オプテイカル　ストレツジ　インタ−ナシヨナル−ユ−エス Record carrier for data memory
JPS6233339A (en) * 1985-07-30 1987-02-13 オプテイカル　ストレツジ　インタ−ナシヨナル−ユ−エス Record carrier for data memory

Also Published As

Publication number Publication date
JPS6346496B2 (en) 1988-09-16

Similar Documents

Publication Publication Date Title
ES467820A1 (en) Method of controlling the position of a write or read head and a device for carrying out the method
JPS5432307A (en) Magnetic reproducer
JPS55157134A (en) Information groove tracing unit
JPS53123026A (en) Magnetic recording/reproducing system
JPS57208639A (en) Recording method of disk
JPS52123205A (en) Video-signal recording and reproducing system
JPS5430831A (en) Information recording system
EP0339672A3 (en) Sampled servo type optical recording medium and optical recording apparatus using the same
JPS53110510A (en) Data recording method for recording medium featuring plural fixed length recording units
JPS5410713A (en) Magnetic recording and reproducing system
JPS5320911A (en) Magnetic recording information reading system
JPS53120411A (en) Time axis converting system using rotary recording medium
JPS5613564A (en) Servo track recording system
JPS5374008A (en) Servo signal writing method
JPS5436906A (en) Information reproducer
JPS523344A (en) Letter pattern generating system
JPS544107A (en) Reference signal writing device
JPS53120412A (en) Data recording and reproducing system
JPS5619281A (en) Video tape recorder
JPS5349910A (en) Video signal process system using rotary recording medium
JPS5356001A (en) Informatoin signal recording/reproducing system
JPS56111151A (en) Tracking control system
JPS5364017A (en) Magnetic recording and reproducing apparatus
JPS5310918A (en) Rotation detection system of disc-shaped recording medium
JPS5429927A (en) Information reproducing method