Projection Display of Radar Image Uning Laser and Fluorescent Screen

Abstract

A conventional PPI scope radar using an afterglow CRT requires a light hood because of dimness, making afterglow CRT unsuitable for simultaneous observation by many observers.
To improve such observation I investigated a large scale display of the radar image using a laser and a fluorescent screen. Furthermore, three scanning methods are presented here; the first using a galvanometric X-Y scanner, the second using a rotating prism and a galvanometric radial scanner, and the last being a high speed PPI scope using a polygon mirror scanner with a rotating prism and an organic daylight fluorescent pigment screen.
These experiments showed the best results the high speed PPI method was used. The high speed PPI method is suitable for many observer observation and has luminance of 16.5 cd/m² and 768 scanning lines.