| 摘要 |
<p>By a light transmitting plate member (2) for illuminated signs, illuminated tables or similar illuminated flat items and intended for uniform diffusion of light from a light source positioned at a side edge (6) of the light transmitter (2) which has a flat side (8) and an opposing side which has a gradual slope, the plate member having a reduced thickness in the direction away from said end edge (6), said opposite sides are produced with optically smooth surfaces as the light transmitting plate member (2) consists of transparent and light transparent material with specific optical properties, the said side with the gradual slope is provided with a number of angled divisions (4) which are defined by transverse divisional lines which run parallel to the side edge (6) and which are positioned with either uniform intervals or with graded intervals which are reduced in the direction receding from said side edge (6), in that the thickness of the light transmitting plate member at the transverse divisional lines corresponds to the thickness of the light transmitting plate member (2) at the side edge (6), whose angled divisions (4) from said divisional lines and in the direction away from the side edge (6) have reducing thicknesses.</p> |
