Producing optical marking line on floor frequented by public - projecting light beam cyclically covering predetermined path to give appearance of line without requiring strong light or projection optics

摘要

The light beam can be projected vertically from the ceiling or inclined and deflected at a repeated frequency higher than the movement resolution of the human eye, pref. 30 Hz or high higher. Pref. the light source is stationary, the beam being deflected by a continuously pivoted and/or rotated mirror. The light beam can be derived from a laser source. The optical marking line (10) on the floor (12) of an area frequented by the public separates a discretion area from the remaining waiting area. The cyclically line-covering light beam (26) is produced from a light source (20), projection optics (22) and a light deflector (24) for projection onto the floor (12). USE/ADVANTAGE - Counters at banks and post offices or cash points, points. Position easily changed. Not subject to dirt or wear.