Optical Reflective Encoders
Seiko NPC SMD series encoder modules combined with VC America’s high precision scales and interpolation circuits achieve world class performance in a miniature footprint.
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Block Diagram![]() | A-B Analog low distortion output (Lissajous curve)![]() |
SMD-01A ![]() | SMD04 ![]() | |
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Track Period | 20µm | 20µm |
Resolution | <5 nanometer to 350 picometer using 10-14 bit A/D interpolation | |
Output | Analog A and B | ✅ Analog A and B and Digital Z (index) |
A B Output Gain | 1, 1.8, 2.6 X setting (LED Brightness) | 1, 1.8X, AGC (LED Brightness)Index use AGC(Automatic Gain control) |
Dimensions L W H (mm) | 5.3 x 4.3 x 1.68 | ✅5.3 x 4.3 x 1.50 |
Gap (mm) | 0.30 | 0.50 |
Operating Temperature range | -20°C to 60°C | ✅-30°C to 85°C |
Series | Description | VC America Recommendations | Status | Datasheets |
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SMD-04 | Optical reflective encoder 20µ period Analog AB plus Z (index) digital output | Active | ![]() | |
SMD-01A | Optical reflective encoder modue 20µ period Analog AB outputs | Active | ![]() | |
SMD-01 | Optical reflective encoder 20 µ period Analog AB outputs | Limited Supply to Inventory | ![]() |