Production method of rectilinear light control unit with lens board, lens substrate with rectilinear light control unit, transmission type screen and a rear type projector

摘要

A method of manufacturing the lens substrate with straight light control portions 1 A 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 32 are provided includes the steps of: preparing a substrate having a plurality of concave portions on one surface thereof; forming the plurality of convex lenses 32 using the substrate having the plurality of concave portions; and forming a straight light control portion 4 in the vicinity of the apex of each of the plurality of convex lenses 32 . The straight light control portion 4 is used for controlling the ratio of straight light in the light entering each of the plurality of convex lenses 32.