Quantum Devices Model LP12 optical encoder provides an improved feedback solution in applications typically using modular encoders. With an overall height of less than one inch and the stability of a bearing encoder design, model LP12 can provide significant performance upgrades in applications limited by traditional modular encoder solutions. Outputs consist of a quadrature with index pulse (incremental or sinusoidal) and three-phase commutation. A flexible member allows for much greater tail shaft run out and TIR than can be tolerated by modular encoder designs, plus it provides 30 degrees of rotation for commutation timing.