JPS63306545A - Optical recorder - Google Patents

Optical recorder

Info

Publication number
JPS63306545A
JPS63306545A JP62142090A JP14209087A JPS63306545A JP S63306545 A JPS63306545 A JP S63306545A JP 62142090 A JP62142090 A JP 62142090A JP 14209087 A JP14209087 A JP 14209087A JP S63306545 A JPS63306545 A JP S63306545A
Authority
JP
Japan
Prior art keywords
information recording
recording track
aperture
optical
along
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
JP62142090A
Other languages
Japanese (ja)
Inventor
Shunichi Sato
Takeshi Kawabe
Tateo Takase
Original Assignee
Sharp Corp
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 Sharp Corp filed Critical Sharp Corp
Priority to JP62142090A priority Critical patent/JPS63306545A/en
Publication of JPS63306545A publication Critical patent/JPS63306545A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To increase information density to be recorded in information recording track by arranging a light shielding member having a rectangular aperture part on an optical path so that the long side of the rectangle is almost parallel to a direction along the information recording track.
CONSTITUTION: The light shielding member 3 having the rectangular aperture part 10 is arranged on the optical path formed at the time of radiating an optical beam from a light source 1 to an information recording track 7 as an optical spot through an objective lens 6, the rectangular shape of the aperture part 10 is almost inscribed with the aperture shape of the lens 6 and the long side of the rectangular shape is almost parallel to the direction along the track 7. When light intensity on the center of an optical spot is allowed to coincide with that of an ordinary case and the radius of the spot is compared with that of the ordinary case, the radius along the information recording track 7 can be reduced. Since the number of records per unit length can be increased, recording density on the information recording track can be increased.
COPYRIGHT: (C)1988,JPO&Japio
JP62142090A 1987-06-05 1987-06-05 Optical recorder Pending JPS63306545A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62142090A JPS63306545A (en) 1987-06-05 1987-06-05 Optical recorder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62142090A JPS63306545A (en) 1987-06-05 1987-06-05 Optical recorder

Publications (1)

Publication Number Publication Date
JPS63306545A true JPS63306545A (en) 1988-12-14

Family

ID=15307196

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62142090A Pending JPS63306545A (en) 1987-06-05 1987-06-05 Optical recorder

Country Status (1)

Country Link
JP (1) JPS63306545A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100702090B1 (en) * 1999-07-22 2007-04-02 가부시키가이샤 히타치세이사쿠쇼 Magnetic recording device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100702090B1 (en) * 1999-07-22 2007-04-02 가부시키가이샤 히타치세이사쿠쇼 Magnetic recording device

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