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Laser Beam Scanning Device

IP.com Disclosure Number: IPCOM000040922D
Original Publication Date: 1987-Mar-01
Included in the Prior Art Database: 2005-Feb-02
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Arjavalingam, G: AUTHOR [+3]

Abstract

A pair of piezoelectric transducers (PZTs) functions linearly with adequate frequency response to control motion of a laser beam for operating on an impelled workpiece without relative motion.

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Laser Beam Scanning Device

A pair of piezoelectric transducers (PZTs) functions linearly with adequate frequency response to control motion of a laser beam for operating on an impelled workpiece without relative motion.

In the figure, pulsed laser beam 1 passes through lens 2 and reflects from mirror 3 onto a workpiece 4 carried by moving belt 5. Beam 1, which may be used for drilling, is preferred to impinge on a workpiece without relative motion. As the workpiece moves, PZTs 6 and 7 held in stationary bracket 8 are oppositely contracted and expanded at an energization rate to cause mirror 3 to rotate about pivot 9. Energization signals are produced in source 10 and applied through operational amplifier 11. Variable beam deflection distances and PZT motion limits can be accommodated by altering the arm length between the fulcrum and PZT actuating points on the mirror back. Pulse rise time of operational amplifier 11 can also be varied to produce the necessary beam motion velocity.

(Image Omitted)

Disclosed anonymously

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