Azimuth angle measuring apparatus

Details Azimuth angle measuring apparatus Azimuth angle measuring apparatus

1975-09-11

1976-08-03

Corbin, John K.

Optics: measuring and testing

Angle measuring or angular axial alignment

Sides of angle or axes being aligned transverse to optical...

356144, 356153, 356154, G01B 1127, G01C 100

Patent

active

039726207

ABSTRACT:
A straight line whose azimuth angle is to be measured, such as the angle of a gap of a magnetic head assembly relative to a disk radius, is imaged on an evaluation plane via a lens and a pair of deflecting mirrors, the first of which is semi-transparent. The mirrors are each inclined at a different angle from a common pivot line. The angular difference is such that the images do not touch and only one end portion of each image from the mirrors lies in the image field. The lateral spacing of these end portions is a function of the azimuth angle. A mask blocking out the center portion of the image may be used to assist in the end portion definition.

REFERENCES:
patent: 3485561 (1969-12-01), Ewald
patent: 3684384 (1972-08-01), Hojo et al.
patent: 3695767 (1972-10-01), George et al.
Parkes, G. L. "Optical Plumb Bob", IBM Tech. Disclosure Bull. vol. 2, No. 4, 12-1959, p. 130.
Whitefield, R. J. "Differential Angular Orientation Measurement Device", IBM Tech. Disclosure Bull. vol. 16 No. 6, 11-1973, pp. 2018-2019.

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