Light transmitting cover for lighting unit - has series of intersecting grooves which form transmitting rhombi with prism surfaces

摘要

A light transmitting cover for lights are matrix for its production having a series of main an subsidiary grooves with intermediate pyramidal or prismatic light deflector or reflector bodies, has the subsidiary grooves (n) which cross the main grooves attached in two main groups which intersect at acute angles (2x2) forming a large number of adjacent rhombi whose diagonals run parallel or at right angles to those of the main rhombi. The quotient of the tangent of the semi-conical angle (21) and that of the semi acute angle (L2) of the adjacent rhombus is a whole number equal to or larger than two.