JP2685092C - - Google Patents

Info

Publication number
JP2685092C
JP2685092C JP2685092C JP 2685092 C JP2685092 C JP 2685092C JP 2685092 C JP2685092 C JP 2685092C
Authority
JP
Japan
Prior art keywords
transparent substrate
recording medium
optical information
information recording
light
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.)
Expired - Lifetime
Application number
Other languages
English (en)
Japanese (ja)
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.)
Maxell Ltd
Original Assignee
Hitachi Maxell Energy Ltd
Publication date

Links

Family

ID=

Similar Documents

Publication Publication Date Title
US4986938A (en) Process for producing plastic substrate for optical disks
EP1184860A2 (en) Method of manufacturing an optical recording medium
US4792227A (en) Apparatus for measuring the refractive index of a substrate for an optical recording medium and method of measuring the same
US5187703A (en) Magneto-optical multilayer recording disk and method of reproducing the same
EP0474050B1 (en) Magnetic optical disc
US5432760A (en) Method of measuring phase difference of opto-magnetic record medium and apparatus for carrying out said method
US4898529A (en) Apparatus for molding magneto-optic substrates
JP2685092B2 (ja) 光情報記録媒体及びその製造方法
US4877666A (en) Magneto-optic substrates
JP2685092C (enrdf_load_stackoverflow)
JP2500146B2 (ja) 光情報記録媒体の製造方法
JP2650839B2 (ja) 光情報記録媒体
USRE37719E1 (en) Optical data recording system and method of production of recording medium
JP2003247934A (ja) 複屈折測定方法及び複屈折測定装置
JPH0579011B2 (enrdf_load_stackoverflow)
JP2500146C (enrdf_load_stackoverflow)
US4876133A (en) Optical data recording system and method of production of recording medium
JP2693950B2 (ja) 光学式デイスク用基盤成形方法
US4788678A (en) Optical information recording media substrate
JPH0557660B2 (enrdf_load_stackoverflow)
JPH09212928A (ja) 光磁気記録媒体および光情報検出装置
EP0612069A2 (en) Magneto-optical disc
Umezawa et al. The Influence of Adjacent Preformat Pits on Magneto-Optical Signals
JP3116986B2 (ja) 光学的情報記録用媒体およびその記録再生方法
JP2604381B2 (ja) 光磁気記録装置