L-CsPhR sensors in the system of measurement and control of optical transparent environment

A sensor that includes a laser and coordinato-sensitive photoreceiver (CsPhR) intended for the thickness-quantity precise measurement of the optical transparent environment such as the glass tubes in fluorescent lighting production, is described. An automatic system based on sliding mode control t technique is described which maintains an invariable thickness of the tube-sides, changing the velocity of tube stretching from a stove(kiln). The angle of incidence and the angle of light rays going-out of the flat parallel plate are equal to each other.