Device for realizing a longitudinal pattern of substantially par

Details Device for realizing a longitudinal pattern of substantially par Device for realizing a longitudinal pattern of substantially par

1994-12-08

1996-12-03

Ben, Loha

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

369111, 369116, 250235, 359216, G11B 700

Patent

active

055815340

ABSTRACT:
An optical scanning device for realizing in a recording layer of an optical tape a longitudinal path (i.e. pattern) of substantially parallel tracks. The device includes an optical system for focusing a radiation beam at the recording layer, which radiation beam causes a scanning spot to develop on the recording layer. The tracks are formed by the optical tape being cyclically scanned, through use of a polygon mirror, via the scanning spot and displaced relative to the optical system in a direction transverse to the scanning direction. The device further includes an optoelectrical measuring unit for deriving a measuring signal indicative of the track pitch of the successively produced tracks. The velocity of the displacement of the optical tape is controlled as a function of the measuring signal.

REFERENCES:
patent: 4661941 (1987-04-01), Bell et al.
patent: 4669070 (1987-05-01), Bell
patent: 4901297 (1990-02-01), Komatsu et al.
patent: 5157650 (1992-10-01), Ozue et al.
patent: 5171984 (1992-12-01), Van Rosmalen
patent: 5278405 (1994-01-01), Zelenka
patent: 5418764 (1995-05-01), Roth et al.

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