A prototype of optical proximity sensor based on RORS

Abstract

Abstract In an effort to develop a practical implementation of the RORS (Riken Optical Range Sensing Method), a prototype was developed. An evaluation was performed with this prototype in combination with an Integrated Circuit intended for use in an auto‐focus camera. The sensor was developed for use in noncontact robot sensor applications and is thus compact, low cost, and easily available. This sensor system consists of a head section and a processing/display section. The size of the sensor head section is 16 mm in dia and 23.5 mm in length, and is capable of measuring the distance from top of the sensor head to a target in 0–6 mm range. The distance signal is obtained as a dc voltage of 90 mV/mm and a digital signal which divides the measuring range into eight levels is also available.