Invention Grant
- Patent Title: Optical recording medium and process for production thereof
- Patent Title (中): 光记录介质及其制造方法
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Application No.: US276543Application Date: 1988-11-28
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Publication No.: US4954380APublication Date: 1990-09-04
- Inventor: Osamu Kanome , Takayoshi Tsutsumi
- Applicant: Osamu Kanome , Takayoshi Tsutsumi
- Applicant Address: JPX Tokyo
- Assignee: Canon Kabushiki Kaisha
- Current Assignee: Canon Kabushiki Kaisha
- Current Assignee Address: JPX Tokyo
- Priority: JPX62-297482 19871127; JPX63-006948 19880118; JPX63-006949 19880118
- Main IPC: G11B7/0033
- IPC: G11B7/0033 ; G11B7/007 ; G11B7/26
Abstract:
An optical recording medium comprises an optical recording layer on a transparent substrate. The optical recording layer is then selectively irradiated with an energy beam to form therein a tracking region for guiding a laser beam for recording and reproduction. The tracking region is free of unevenness and has an optical characteristic different from that of the portion of the optical recording constituting a data recording region which has not been irradiated with the laser beam.
Public/Granted literature
- US5548165A Hybrid filter for reducing distortion in a power system Public/Granted day:1996-08-20
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