A method of manufacturing the lens substrate with straight light control portions 1A that is provided with a plurality of convex lenses (microlenses) 32 on a surface thereof and is used so that light enters the lens substrate from the side of the surface thereof on which the plurality of convex lenses...http://www.google.com/patents/US7292391?utm_source=gb-gplus-sharePatent US7292391 - Method of manufacturing a lens substrate with straight light control portions, a lens substrate with straight light control portions, a transmission screen and a rear projection
