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公开(公告)号：MY105726A
公开(公告)日：1994-11-30
申请号：MYPI19901101
申请日：1990-06-28
Applicant: SONY CORP
Inventor： TAKUYA KAERIYAMA
Abstract: HELICAL SCAN RECORDING/REPRODUCTION APPARATUS TAPE GUIDES WHICH INLUDE ROTARY INCLINED GUIDES ARRANGED ON OPPOSITE SIDES OF THE HEAD CYLINDER AND LEADS ARE PROVIDED FOR REGULATING WIDTHWISE MOVEMENT OF THE TAPE ON THE CYLINDER CAUSED WHEN THE TAPE TRAVELS ON THE CURVED SURFACE OF THE ROTARY INCLINED GUIDES, SO THAT THE WIDTHWISE POSITION OF THE TAPE UPON TAPE TRAVEL CAN BE AUTOMATICALLY REGULATED, AND THE LOAD TO THE TAPE DRIVE MOTOR CAUSED BY TAPE FRICTION IS REDUCED.(FIG 1)
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公开(公告)号：MY126707A
公开(公告)日：2006-10-31
申请号：MYPI20002430
申请日：2000-05-31
Applicant: SONY CORP
Inventor： NAOHIRO NETSU , YOSHITAKA AOKI , TETSU WATANABE , KAZUHIKO FUJIIE , YASUAKI MAEDA , TAKUYA KAERIYAMA
Abstract: AN OPTICAL RECORDING MEDIUM (1)IS PROVIDED WHICH HAS A SUBSTRATE ANS A SIGNAL RECORDING LAYER PROVIDED ON THE SUBSTRATE AND IN WHICH AN INFORMATION SIGNAL IS RECORDED IN THE FORM OF MICROSCOPIC PITS . A LIGHT BEAM IS FOCUSED ON THE SIGNAL RECORDING LAYER AND SOME CHANGE OF THE LIGHT BEAM CARRIED BY A RETURN LIGHT FROM THE SIGNAL RECORDING LAYER IS DETECTED TO READ THE INFORMATION SIGNAL RECORDED ON THE SIGNAL RECORDING LAYER. THE OPTICAL RECORDING MEDIUM (1) HAS A DIAMETER OF 65 MM OR LESS AND A THICKNESS OF 0.4 TO 0.70 MM . AN INFORMATION SIGNAL RECORDING AREA EXTENDS OUTWARDLY FROM A RADIAL POSITION OF 12.5 MM OR LESS FROM THE CENTER OF THE MEDIUM (1). THE RATIO IN AREA BETWEEN THE INFORMATION SIGNAL RECORDING AREA AND NON-SIGNAL RECORDING AREA IS 3.4 OR MORE . THE STORAGE CAPACITY OF THIS MEDIUM (1) IS 2 GIGABYTES OR MORE . THE OPTICAL RECORDING MEDIUM (1) HAS FORMED AT THE CENTER THEREOF A CENTER HOLE (57) AROUND WHICH AN ANNULAR TABLE-ABUTMENT CONVEXING TO ONE SIDE OF THE MEDIUM (1) IS FORMED . A MAGNETIC-CLAMPING HUB (5) IS INSTALLED IN THE CENTER HOLE (57) AND THUS THE MEDIUM (1)IS MAGNETICALLY CLAMPED TO A ROTATION DRIVING MECHANISM OF AN OPTICAL RECORDING AND/OR REPRODUCING APPARATUS . THE COMPACTNESS AND HIGH DENSITY OF RECORDING OF THE OPTICAL RECORDING MEDIUM (1) WILL CONTRIBUTE GREATLY TO A FURTHER COMPACT STRUCTURE OF A RECORDING AND/OR REPRODUCING APPARATUS IN WHICH THE MEDIUM (1) IS TO BE USED.FIG.1
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公开(公告)号：SG96554A1
公开(公告)日：2003-06-16
申请号：SG200003208
申请日：2000-06-08
Applicant: SONY CORP
Inventor： NAOHIRO NETSU , YOSHITAKA AOKI , TETSU WATANABE , KAZUHIKO FUJIIE , YASUAKI MAEDA , TAKUYA KAERIYAMA
Abstract: An optical recording medium is provided which has a substrate and a signal recording layer provided on the substrate and in which an information signal is recorded in the form of microscopic pits. A light beam is focused on the signal recording layer and some change of the light beam carried by a return light from the signal recording layer is detected to read the information signal recorded on the signal recording layer. The optical recording medium has a diameter of 65 mm or less and a thickness of 0.4 to 0.7 mm. An information signal recording area extends outwardly from a radial position of 12.5 mm or less from the center of the medium. The ratio in area between the information signal recording area and non-signal recording area is 3.4 or more. The storage capacity of this medium is 2 gigabytes or more. The optical recording medium has formed at the center thereof a center hole around which an annular table-abutment convexing to one side of the medium is formed. A magnetic-clamping hub is installed in the center hole and thus the medium is magnetically clamped to a rotation driving mechanism of an optical recording and/or reproducing apparatus. The compactness and high density of recording of the optical recording medium will contribute greatly to a further compact structure of a recording and/or reproducing apparatus in which the medium is to be used.
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