Linear and rotary multitrack absolute position encoder and methods using the same

US10502593B1 · kind B1 · utility

Inventors

• Philip M. Johnson · Charlton, US
• David K. Johnson · Plano, US

Key dates

• Filing date: Jun 6, 2019
• Grant date: Dec 10, 2019
• Expiry date: Jun 6, 2039

Classification

• Technology area (CPC G): Physics
• CPC primary: G01D5/34746
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

Optical Position Encoders and methods using the same are described. In embodiments, the optical position encoders include a multitrack Hybrid Cyclic Binary Code-2 (HCBC-2) encoded scale and an Optical Readout Assembly (ORA), where the ORA provides absolute position optical readout and automatic physical alignment to the scale. Linear optical position encoders, rotary optical position encoders, and methods of measuring the position of ORA relative to a scale using such encoders are also described.