Apparatus for controlling the velocity of a member in a digital

Details Apparatus for controlling the velocity of a member in a digital Apparatus for controlling the velocity of a member in a digital

1985-12-03

1987-10-06

Goldberg, E. A.

Recorders

Printing, dotting, or punching marker

Ink transfer support or moving means

G01D 942

Patent

active

046986499

ABSTRACT:
A control system for controlling the velocity of a member in a printing system which utilizes a signal representative of the time variation in intensity produced by the Doppler shift between radiation reflected from the moving member and a reference signal to generate a control signal for correcting the velocity of the moving member. The control signal is applied to a servo mechanism to modify the velocity of the moving member in the appropriate manner.

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Sprague, R. A., "Advances in Laser and E-O Printing Technology," Laser Focus/Optics, Oct. 1983, pp. 101-109.
B. Lehmann et al, "On-Axis Velocity Measurement by Laser Doppler Anemometry," J. Phys. E.:Sci. Instrum., vol. 17, 1984, pp. 455-457.
Mertz, L., "Real-Time Fringe-Pattern Analysis, Applied Optics," vol. 22, No. 10, 15 May 1983, pp. 1535-1539.
"Laser Beams Speed Up Reticle Writing," Electronics, Oct. 7, 1985, pp. 40-42.

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