Reflection optical encoders are studied as three-grating moiré systems. An analysis is made of the differences that may appear between it and the standard case in which an optical encoder is regarded as a two-grating system.
© 2000 Optical Society of America
(050.1940) Diffraction and gratings : Diffraction
(050.1950) Diffraction and gratings : Diffraction gratings
(120.3940) Instrumentation, measurement, and metrology : Metrology
(120.4120) Instrumentation, measurement, and metrology : Moire' techniques
(120.5700) Instrumentation, measurement, and metrology : Reflection
Daniel Crespo, Jose Alonso, and Eusebio Bernabeu, "Reflection Optical Encoders as Three-Grating Moireé Systems," Appl. Opt. 39, 3805-3813 (2000)