Transverse Doppler measurement by VCSEL-based optical translation measurement (OTM) sensor

Optical Translation Measurement (OTM), developed by GOU Lite Ltd, is a novel Doppler based motion measurement method. An OTM sensor includes a laser diode, detectors and optics integrated into a small transistor-style package. The sensor measures the relative motion of surfaces placed adjacent (up to a few millimeters) to its aperture. The OTM sensor is thus a compact 3D Doppler motion sensor, measuring two transverse (perpendicular to illumination beam) and one longitudinal directions of motion. Integration of low power (less than 1 mW) VCSELs enables low cost, low power consumption sensors. OTM is characterized by high SNR, high accuracy, resolution of a few wavelengths, and independence of the measurement from the distance to and the type of the surface. OTM is an 'enabling technology,' with potential wide-spread use both in traditional encoding tasks and in new applications.© (2000) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.