The principle feature fo optical rotary absolute encoder！

The rotary encoder is a light mechanical and electrical technology in one of the speed of displacement sensor. When the rotary encoder grating disk drive shaft rotates, the light emitted by the light emitting element is the grating disk slot cut into intermittent light receiving element and generate an initial signal. The signal processing circuit after subsequent output pulse or code signal. It features small size, light weight, variety, full-featured, high frequency response, high resolving power, torque is small, low power consumption, stable performance, reliability and long service life.

Absolute encoders

When the absolute encoder shaft rotator have position correspondence code (binary, BCD code, etc.) output from the code changes the size of the positive and negative directions to determine the location and displacement, without judgment to the circuit. It has an absolute zero-bit code, when a power failure or power-cycle re-measure, you can still read accurately position to power failure or shutdown code, and find exactly zero code. Under normal circumstances an absolute encoder measuring range of 0 to 360 degrees, but special models can also be multi-ring measurements.

Previous：the drawbacks of shaft encoder when detecting angular displacement
Next：Roundss 100ppr incremental digital pulse generator