A method of widening the directional range of view of a mirror device without enlarging the surface area of the device by suitably combining a number of partially-reflecting surfaces includes provision to avoid discontinuities and overlaps in the field of view. It also makes it possible...http://www.google.fr/patents/US5838505?utm_source=gb-gplus-shareBrevet US5838505 - Divided-reflection method of wide-angle observation and wide-angle view automobile mirror
Divided-reflection method of wide-angle observation and wide-angle view ...
