What are optical encoders?

What is an optical encoder used to do?

An optical encoder, an electromechanical device, uses light sources, light detectors and optical gratings to convert motion or angular positions into an electrical signal. The light is detected by the optical detectors and a corresponding electric pulse is generated.

What is an encoder? There are two types of encoders. One is linear, the other is rotary. A linear encoder responds only to motion along a line, while a rotating encoder responds only to rotational motion. An encoder can be categorized using its output. Absolute encoders generate unique bit configurations that allow you to track your position directly.

You should also know what optical rotary encoder is.

Basics of an Optical Rotary Encoder An optical rotary encoder is a moving disk with concentric tracks etched into it. These tracks are known as windows. Each track has a window that is offset so that every revolution of the optical-rotary encoder produces a different light/dark pattern.

What is an absolute encoder?

An encoder can be either incremental or absolute. Each shaft position is assigned a unique code by Absolute Encoders . In other words, each position in an absolute encoder has its own unique code. An absolute encoder interprets a set of coded tracks in order to create position information. No two positions can be identical.