Title :
Image processing techniques for increasing the dynamic range of a Shack-Hartmann positioner
Author :
Arines, J. ; Ares, J. ; Bara, S.
Author_Institution :
Area de Opt., Santiago de Compostela Univ., Spain
Abstract :
Summary form only given. Traditional methods of windowing for centroid determination of the focal regions which are present in Shack-Hartmann (SH) image data are not very appropriate for application of a sensor in positioning tasks. The maximum allowed centroid displacement is limited by the size of the window. When a divergent spherical wavefront (as in the positioning case is required) is incoming to the SH, some image processing techniques can allow us to overcome these limitations.
Keywords :
image processing; optical focusing; optical sensors; position control; position measurement; Shack-Hartmann image data; Shack-Hartmann positioner; allowed centroid displacement; centroid determination; divergent spherical wavefront; dynamic range; focal regions; image processing techniques; positioning case; positioning tasks; Adaptive optics; Algorithm design and analysis; Apertures; Dynamic range; Image processing; Instruments; Optical filters; Optical interferometry; Optical sensors; Speckle;
Conference_Titel :
Lasers and Electro-Optics Europe, 2000. Conference Digest. 2000 Conference on
Conference_Location :
Nice
Print_ISBN :
0-7803-6319-1
DOI :
10.1109/CLEOE.2000.910151
