An optical system for measuring the eccentricity of glass wool pipe — for industrial use
An optical system for measuring the eccentricity of the glass wool pipe has been developed for an industrial use. The system consists of a contact sensor, a photo light sensor and a signal processing system with a logic circuit. The system is simple, fast and efficient for practical use; it allows implementation of on-line process monitoring and alarm warning signals for unacceptable pipe eccentricity during manufacturing.
A simple optical method for the measurement of glass wool fiber diameter
Abstract An optical method for measuring glass wool fiber diameter has been proposed and discussed from the viewpoint of practical use. The method is based on both light scattering and light reflection on the glass wool. The method can measure the mean fiber diameter, d, in the area illuminated by laser light in realtime. The accuracy of the method, i.e., the dimensional resolution, was found to be about 0·7  μ m within the diameter range of d⩽7·0  μ m.
Realtime Optical Sensor for Dye Color and Concentration Detection
A method for a realtime detection of a dye has been proposed which enables us to measure a concentration and it's fluctuation of the three base colors. The method is based on a light attenuation theory and its principle requires three different lasers having the three base colors. A series of preliminary experiments have been conducted using a semi-conductor laser with a wavelength of 670 nm in order to confirm the feasibility of the method. The results show that the sensitivity of the system is found to be 0.1% in weight and that the present method is capable of the measurements if three base color lasers are used as discussed in the paper.