Television Image Enlarged By Revolving Spiral Mirror (Dec, 1936)
Television Image Enlarged By Revolving Spiral Mirror
Enlargement of television pictures to a size that can be shown to large theater audiences has been achieved by a spiral-mirror contrivance invented by a German engineer. The ordinary image on the television tube is too small to be seen except by those close at hand, but with the aid of the spiral mirror the picture is caught from the tube, thrown through an enlarging camera or system of magnifying lenses and projected to any desired size. The spiral is driven by an electric motor.