The SMD-01A is a miniature, reflective optical incremental encoder head with analog AB outputs. SMD-01A use a 20µ period; combined with interpolation circuit nanometer to submicron resolution is achieved. And SMD-01A low-noise high-precision analog signals 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.



Block Diagram

Key Features

  • Miniature package: 14-pin HCOB (5.3 × 4.3 × 1.68mm)
  • High-precision A/B-phase analog outputs
  • Noise-resistant differential output support
  • Optimized OEIC and optics design for easy mounting alignment
  • Adjustable LED brightness using external inputs
  • Analog (sine wave) A,B output
  • 5V or 3.3V supply voltage operation
  • Operating temperature range: -20 to +60°C


  • Metrology, CMM
  • Laser optical axis control
  • Assembly machines
  • Laser optical axis control
  • Measuring instruments
  • High-precision rotary and linear encoders
  • Stages, Actuators
  • Robotics motion control


  • smaller and accurate encoders
  • Improved accuracy
  • Lower assembly costs
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