RT Journal Article
T1 Self-imaging with curved gratings
A1 Torcal Milla, Francisco José
A1 Sánchez Brea, Luis Miguel
A1 Salgado Remacha, Francisco Javier
A1 Bernabeu Martínez, Eusebio
AB We analyze the near field behavior of binary amplitude gratings which present a curved profile. This configuration has an important application in rotary optical encoders. This kind of encoders is used to measure the angular displacement between two different parts of the devices. To our knowledge, its behavior in the near field has not been analyzed yet. We have found that Talbot effect is produced but the period of the self-images and Talbot distances change as we separate from the grating. We have fabricated a curved grating and have performed the experiment to corroborate the behavior theoretically found. This fact could be useful in systems that use Talbot effect to measure displacements, since the mechanical tolerances grow.
PB Elsevier Science BV
SN 0030-4018
YR 2010
FD 2010-10-15
LK https://hdl.handle.net/20.500.14352/44285
UL https://hdl.handle.net/20.500.14352/44285
LA eng
NO © 2010 Elsevier B.V.This work has been supported by project CCG08-UCM/DPI-3952 of Dirección General de Universidades e Investigación de la Consejería de Educación de la Comunidad de Madrid and project DPI2008-02391 of the Ministerio de Ciencia e Innovacion of Spain.
NO Dirección General de Universidades e Investigación de la Consejería de Educación de la Comunidad de Madrid
NO Ministerio de Ciencia e Innovación (MICINN), España
DS Docta Complutense
RD 8 abr 2025