Reflection optical encoders as three-grating moiré systems.
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.
Crespo
D
D
Departamento de Optica, Universidad Complutense de Madrid, Avenida Complutense syn, 28040 Madrid, Spain.
Alonso
J
J
Bernabeu
E
E