Mastering machine for making an on-land recording master disk wi

Details Mastering machine for making an on-land recording master disk wi Mastering machine for making an on-land recording master disk wi

1987-12-29

1990-08-28

Psitos, Aristotelis M.

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

369 31, G11B 709 H

Patent

active

049531522

ABSTRACT:
A mastering machine for an optical disk provided with a closed loop for controlling the incident angle of at least one of the guide groove forming beam and header forming beam which enter a condenser lens, and thereby controlling to a predetermined level the distance between a guide groove forming light spot and a header forming light spot on a photosensitive layer.

REFERENCES:
patent: 4525823 (1985-06-01), Sugiyama et al.
patent: 4571712 (1986-02-01), Romano et al.
patent: 4669072 (1987-05-01), Miura et al.
patent: 4670869 (1987-06-01), Chen
patent: 4700336 (1987-10-01), Yoshida et al.
patent: 4707816 (1987-11-01), Yonezawa et al.
patent: 4782474 (1988-11-01), Aidi et al.

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