Apparatus measuring an output of a disk drive

Details Apparatus measuring an output of a disk drive Apparatus measuring an output of a disk drive

1991-08-09

1993-08-17

McElheny, Jr., Donald E.

Dynamic information storage or retrieval

Condition indicating, monitoring, or testing

Including radiation storage or retrieval

G11B 3310

Patent

active

052375510

ABSTRACT:
An apparatus for measuring an optical output of an optical pickup device disposed in an optical disk drive unit has a dummy cartridge approximately of the same type as a disk cartridge mounted to the optical disk drive unit; a light-receiving element disposed in a predetermined position of the dummy cartridge; an optical level measuring display device for inputting the light-receiving signal thereto and displaying a measured value of the optical output; and a controller for controlling an operation of the optical disk drive unit such that this optical disk drive unit performs a predetermined operation for measuring the optical output. The above measuring apparatus may further comprise a connector device for externally outputting the light-receiving signal of the light-receiving element. In this case, the optical level measuring display device inputs the light-receiving signal thereto through the connector device. An apparatus for measuring a magnetic field distribution of a magnetic head disposed in a magnetooptic disk drive unit and generating an auxiliary magnetic field is also shown.

REFERENCES:
patent: 4504871 (1985-03-01), Berwick et al.
patent: 5159182 (1992-10-01), Eisele
Parts Express International Inc. Catalog, Copyright Mar. 1990, Last Page (Back Cover).

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