Modeling and Analysis on Optical Path of Infrared Reflective Photoelectric Sensor

Abstract

In order to reduce the blind area and enlarge the measurement range of reflective photoelectric sensor, a simplified optical model is established to prove that the main factors affecting performance of the conventional reflective photoelectric sensor is optical design parameters defects. Through a simple pre partial emission angle design of light path and constructing the optical path model, a calculation method is given to calculate blind area and measurement range. Results show that with small blind area, wide measurement range and high sensitivity, the best measuring distance of the acute angle optical path model can be accurately calculated after the emitted light intensity reaches the set value due to its quantitative characteristic; the acute angle optical path model performance parameters are better than the right angle optical path model. The research has guiding significance for the design of reflective photoelectric sensor.