standard for linear encoders of the LIP
design types is a phase grating applied to a carrier of steel
(LIP) or glass (LIP and LIF).
Linear encoders of the LIDA
type operates with AURODUR steel scales with a graduation of
highly reflective gold lines and matte etched spaces.
Linear encoders of the LIM
type operates according to a magnetic scanning principle.
two-coordinate encoder has a two-dimensional phase-grating
structure on a glass substrate. Through an interferential scanning
method such as is used on the LIP and LIF linear encoders, this
structure enables the PP to make measurements in a plane.