Apparatus and methods for positioning optical fibers and other r

Details Apparatus and methods for positioning optical fibers and other r Apparatus and methods for positioning optical fibers and other r

1996-09-17

1998-09-15

Nguyen, Vinh P.

Electricity: measuring and testing

Impedance, admittance or other quantities representative of...

Lumped type parameters

324661, 385 4, G01R 2726, G02F 1295

Patent

active

058084720

ABSTRACT:
A positioning apparatus positions free ends of resilient members. The apparatus couples a capacitance member to the free end and places the capacitance member within an electrode system. A voltage source applies an electric charge to the capacitance member and voltage signals applied to the electrode system generate electric fields which urge the free end to a position of equilibrium between an urging force of said electric field on said electric charge and an internal restoring force of said resilient member. This apparatus is adapted to also be a position sensing apparatus which includes a time-variable signal generator that is coupled to the capacitance member and a current sensor that senses current magnitudes in the electrodes of the electrode system. Each current magnitude is representative of the distance between that electrode and the capacitance member. The positioning apparatus and the position sensing apparatus are incorporated into positioning systems which track a light beam with the free end of an optical fiber.

REFERENCES:
patent: 4474469 (1984-10-01), Abe
patent: 4520570 (1985-06-01), Bednorz
patent: 4651343 (1987-03-01), Laor
patent: 4721354 (1988-01-01), Kaspar
Tippens, Applied Physics, Mc-Graw-Hill Book Co., Third Edition, p. 590-591, 1985.
Lambert, Stephen G., et al., Laser Communications in Space, Artech House, Norwood, MA., 1995, pp. 219-222.

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