Universidad Complutense de Madrid
E-Prints Complutense

Generation of optical reference signals robust to diffractive effects

Impacto

Descargas

Último año

Saez Landete, José y Salcedo Sanz, Sancho y Rosa Zurera, Manuel y Alonso Fernández, José y Bernabeu Martínez, Eusebio (2007) Generation of optical reference signals robust to diffractive effects. Ieee Photonics Technology Letters, 19 (13-16). pp. 1133-1135. ISSN 1041-1135

[img] PDF
Restringido a Sólo personal autorizado del repositorio hasta 31 Diciembre 2020.

110kB

URL Oficial: http://dx.doi.org/10.1109/LPT.2007.900334


URLTipo de URL
http://ieeexplore.ieee.orgEditorial


Resumen

In grating measurement systems, a reference signal is needed to achieve an absolute measurement of the position. The zero reference signals are normally obtained illuminating two identical superimposed zero reference codes (ZRCs) and registering the transmitted light by means of a photodiode. As one ZRC moves with respect to the other, the two codes overlap and the signal registered is the autocorrelation of the ZRC transmittance. In high resolution systems, the diffraction effects degrade the geometrical shadow of the first ZRC as it propagates to the second one. As a result, the autocorrelation is also degraded and the amplitude of the reference signal is greatly reduced. In this letter, we present a method for designing ZRCs with minimum diffractive effects. The method is based on the optimization of ZRCs by means of a genetic algorithm.


Tipo de documento:Artículo
Información Adicional:

© IEEE.

Palabras clave:Design
Materias:Ciencias > Física > Optica
Código ID:26659
Depositado:25 Sep 2014 10:41
Última Modificación:25 Sep 2014 10:41

Descargas en el último año

Sólo personal del repositorio: página de control del artículo