INVESTIGADORES
PEREZ QUINTIAN Luis fernando
congresos y reuniones científicas
Título:
Study of a new design of an incremental optical encoder
Autor/es:
LUTENBERG, ARIEL; PEREZ QUINTIAN, FERNANDO; REBOLLO, MARÍA A.
Lugar:
San Diego, California
Reunión:
Congreso; SPIE Optics & Photonics; 2006
Institución organizadora:
SPIE
Resumen:
A new design of an incremental optical
encoder with a sub-micrometric resolution, composed of
a divergent beam coming from an uncollimated laser diode, a sinusoidal phase
diffraction grating and a detector consisting of a mask and a photodiode array
is presented. It is modeled by the scalar theory of diffraction in the Fresnel
approximation, obtaining the expression for the field at the detector plane.
The tolerance of the system to rotations or displacements of its elements is
analyzed. The output of the photodiode array is connected to an electronic
interpolation circuit in order to verify the viability of the design.
