Conventional Optical Absolute！

A conventional absolute
encoder disk features a series of
concentric tracks, each
consisting of a pattern of
transparent and opaque
segments. These independent
tracks provide a unique
combination of absolute values
for each resolvable position.
One track is needed for each
“bit” of position information
that is output as either a serial
or parallel data “word.”
The preferred code format is
Gray Code, in which only one

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