The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 26, 1987
Filed:
Jan. 29, 1985
Noriaki Wakabayashi, Hirakata, JP;
Hiromichi Ishibashi, Toyonaka, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
An optical disk drive apparatus, for data or information disks of which the data or information are able to record or playback on each of the recording tracks, comprises an optical rotary pick-up head actuator for both seeking and following to the recording track to read or write data signals by a light beam. The light beam is injected along the axis of rotation of the optical rotary pick-up head actuator; guided through a stick-shaped prism in cantilever form which is fixed by one side on the optical rotary pick-up head actuator and is unsuspended by the other side; and focused upon the recording surface of the disk through an objective lens which can be rotatively moved and controlled with the optical rotary pick-up head actuator in the direction to seeking the tracks. An reflective light beam from the recording surface of the disk is guided in the reverse order and is taken out from the center axis of rotation.