Share Email Print
cover

Proceedings Paper

Laser-diode-based pseudo-heterodyne interferometer for online process control of wire bonders
Author(s): Andrew C. Lewin; F. Ritter; Georg Siegmund
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

As part of a government funded multidisciplinary project, a sensor has been developed to allow the measurement of the ultrasonic amplitude at the tip of the bonding too. A laser interferometer has been designed with a fiber coupled miniature measurement head which can be mounted on the rotating bond head. A modulated visible diode laser is employed to generate a direction-sensitive Doppler signal according to the pseudo-heterodyne principle.

Paper Details

Date Published: 22 May 2000
PDF: 11 pages
Proc. SPIE 4072, Fourth International Conference on Vibration Measurements by Laser Techniques: Advances and Applications, (22 May 2000); doi: 10.1117/12.386725
Show Author Affiliations
Andrew C. Lewin, Polytec GmbH (Germany)
F. Ritter, Polytec GmbH (Germany)
Georg Siegmund, Polytec GmbH (Germany)


Published in SPIE Proceedings Vol. 4072:
Fourth International Conference on Vibration Measurements by Laser Techniques: Advances and Applications
Enrico Primo Tomasini, Editor(s)

© SPIE. Terms of Use
Back to Top