Non-contact servo track writing apparatus having read/head arm a

Details Non-contact servo track writing apparatus having read/head arm a Non-contact servo track writing apparatus having read/head arm a

1993-01-04

1994-05-24

Turner, Samuel A.

Optics: measuring and testing

By dispersed light spectroscopy

Utilizing a spectrometer

356373, 356 72, 360 7811, G01B 902

Patent

active

053153723

ABSTRACT:
A servo track writing apparatus (10, 210) for writing servo tracks (16) on a media disk (14) of a disk drive assembly (12), the servo track writing apparatus (10, 210) having a laser interferometer (30) for positioning a remote servo track positioning arm (48, 248) with a second cube corner retroreflector (46) attached thereto. A relationship determining apparatus (56, 256) determines the physical relationship between the track positioning arm (48, 248) and a head positioning arm (22) or linear head actuator (220) using a light emitting device (58) and a photosensitive diode array (60). A third light beam (62) from the light emitting device (58) is reflected from the head positioning arm (22) or linear head actuator (220) onto the photosensitive diode array (60) and variations in the position of the third light beam (62) on the photosensitive diode array (60) cause a head positioning arm servo motor (68) to move the head positioning arm (22) or linear head actuator (220)head positioning arm (22) or linear head actuator (220) as required.

REFERENCES:
patent: 3800317 (1974-03-01), Lin
patent: 4679105 (1987-07-01), Maryatt
patent: 4784490 (1988-11-01), Wayne
patent: 4920442 (1990-04-01), Dimmick
patent: 5074661 (1991-12-01), Reynolds et al.
patent: 5107107 (1992-04-01), Osborne
patent: 5108184 (1992-04-01), Brown et al.

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