New SMD-04 precision optical reflective encoder module with 20 micron period with Index in miniature 5.4x4.3x1.5mm package. Accuracy to ±1 arc-second for rotary and <1 nanometer to ≤1 micron resolution and accuracy for linear applications. Building on Seiko NPC SMD-01A which offers precision positioning for 3D scanning, metrology, machine automation, and robotics, the new SMD-04 adds a unique index function to futher miniaturize, lower parts count and lower system cost. Analog A-B and complementary outputs with digital Z output. -30°C to 85°C operation. See our product pages and contact sales for more information.