SMD-01B

Metrology and precision 2-channel Encoder module

Key Features

Accurate Encoder Performance
- High resolution 20 µm track period
  - 1270 LPI (Lines per Inch) / 50 Lines per mm
  - Quadrature output is 5080 LPI / 200 Lines per mm
- Low noise A/B analog and digital Z (index) outputs
  - Low distortion Lissajous curve reduces cyclical errors and improves interpolation repeatability and accuracy
- Lower assembly & manufacturing costs
  - Proven reliability and long lifetime
  - 14-pin HCOB (5.3 × 4.3 × 1.68mm)
  - Optimized OEIC and optics design for easier mounting alignment

Typical Applications

Metrology, CMM
Laser optical axis control
Assembly machines
Measuring instruments
Precision rotary and linear encoders
Stages, Actuators
Robotics

The SMD-01B is a miniature, Optical reflective incremental encoder head module with 2-Channel analog A/B outputs.

SMD-01B 20µ period combined with interpolation circuit can achieve subnanometer resolution. And SMD-01B low-noise low distortion analog output maximize accuracy.

A unique LED receptor provide wider tolerance to misalignment, YAW, external contamination and humidity. This reduces assembly process workload required for a high-precision encoder, and simultaneously supports miniaturization and high accuracy requirements.

20µm Resolution and Interpolation
Encoding	Imperial		Metric
Encoding	LPI (lines per inch)	Resolution	LPM (lines per mm)	Resolution
×1	1270 LPI	0.787 mils	50 LPM	20µm
Quadrature A-B ×4	5080 LPI	0.197 mils	200 LPM	5µm
With external ADC 12-bit Interpolation	20,807,680 LPI	0.0000481 mils	819,200 LPM	0.0012207µm
With external ADC 16-bit Interpolation	332,922,880 LPI	0.00000300625 mils	13,107,200 LPM	0.07629375nm