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Avago: Linear Optical Incremental Encoder Modules (HEDS-9200 Series)
Description
The HEDS-9200 series is a high performance, low cost, optical incremental encoder module. When operated in conjunction with a code strip, this module detects linear position. The module consists of a lensed LED source and a detector IC enclosed in a small C-shaped plastic package. Due to a highly collimated light source and a unique photodetector array, the module is extremely tolerant to mounting misalignment.
The two channel digital outputs and the single 5 V supply input are accessed through four 0.025 inch square pins located on 0.1 inch centers.
Five standard resolutions between 4.72 counts per mm (120 counts per inch) and 7.87 counts per mm (200 counts per inch) are available. Consult your local Avago sales representatives for other resolutions ranging from 1.5 to 7.87 counts per mm (40 to 200 counts per inch).
Features
High Performance
High Resolution
Low Cost
Easy to Mount
No Signal Adjustment Required
Insensitive to Mechanical Disturbances
Small Size
-40 degrees C to 100 degrees C Operating Temperature
Two Channel Quadrature Output
TTL Compatible
Single 5 V Supply
Transmissive Encoders
The Transmissive Encoder is an emitter/detector module. Coupled with a code wheel, this transmissive encoder translates rotary motion of a shaft into digital output. The transmissive encoder contains a single Light Emitting Diode (LED) as its light source. The light is collimated into a parallel beam by means of a single polycarbonate lens located directly over the LED. Opposite the emitter is the integrated detector circuit.
This IC consists of multiple sets of photodetectors and the signal processing circuitry necessary to produce the digital waveforms. The code wheel rotates between the emitter and detector of the transmissive encoder, causing the light beam to be interrupted by the pattern of spaces and bars on the code wheel. The photodiodes which detects these interruptions are arranged in a pattern that corresponds to the radius and design of the code wheel. These detectors are also spaced such that a light period on one pair of detectors corresponds to a dark period on the adjacent pair of detectors. Avago offers an extensive range of transmissive encoders to meet the different needs of a wide variety of applications.
*Note: Codestrip not included with HEDS-9200