http://www.usa.canon.com/cusa/semiconductor/products/encoder_optolectronic_components/laser_doppler_velocity_sensor/lv_series?pageKeyCode=writeReviewPage
LV Series
3333339
Overview
Canon Laser Doppler Velocimeter System is a high-precision, contactless metrology unit designed to measure velocity. It is based on diffracted laser beam doppler principle. It is a precision instrument immuned to temperature change and/or semiconductor laser wavelength fluctuations.