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.)
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co 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 Matsushita Electric Industrial Co LtdfiledCriticalMatsushita Electric Industrial Co Ltd
Priority to JP57080448ApriorityCriticalpatent/JPS57203233A/ja
Publication of JPS57203233ApublicationCriticalpatent/JPS57203233A/ja
Publication of JPH0127489B2publicationCriticalpatent/JPH0127489B2/ja
G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
Landscapes
Physics & Mathematics
(AREA)
Optics & Photonics
(AREA)
Optical Recording Or Reproduction
(AREA)
Optical Head
(AREA)
JP57080448A1982-05-121982-05-12Optical recorder and reproducer
GrantedJPS57203233A
(en)