INVESTIGADORES
PEREZ QUINTIAN luis fernando
artículos
Título:
Zero reference signal for displacement measuring systems by use of speckle
Autor/es:
PEREZ QUINTIAN, FERNANDO; ALONSO, JOSÉ; ATENCIA, JESÚS; BERNABEU, EUSEBIO
Revista:
APPLIED OPTICS
Referencias:
Año: 2003 p. 6797 - 6803
ISSN:
0003-6935
Resumen:
An optical method for generating a reference signal for an incremental displacement measurementsystem is proposed. We achieved this zero reference signal by comparing two speckle patterns arriving from two symmetric diffusers, which are used as natural random codes that are identical only when the reading head is located equidistantly between the diffusers. The comparison of the speckles is obtained either by interference, as in a Michelson interferometer, or by intensity correlations.
