Patent ID: 8593700
Filing Date: 2013-11-26
Classification: G02B,H04N

Abstract:
1. An erecting equal-magnification lens array plate comprising: a first lens array plate provided with a plurality of first lenses systematically arranged on a first surface and a plurality of second lenses systematically arranged on a second surface opposite to the first surface; a second lens array plate provided with a plurality of third lenses systematically arranged on a third surface and a plurality of fourth lenses systematically arranged on a fourth surface opposite to the third surface; a first light shielding wall provided upright on the first surface to surround each of the first lenses; a second light shielding wall provided upright on the fourth surface to surround each of the fourth lenses; and a light shielding member provided between the first lens array plate and the second lens array plate and provided with a plurality of apertures corresponding to the second lenses and the third lenses, wherein the first lens array plate and the second lens array plate form a stack such that the second surface and the third surface face each other to ensure that a combination of the lenses associated with each other form a coaxial lens system, and such that the erecting equal-magnification lens array plate receives light from a line light source facing the first surface and forms an erect equal-magnification image of the line light source on an image plane facing the fourth surface, wherein at least one of an area outside a portion having the function of lenses on the first surface, an area outside a portion having the function of lenses on the second surface, an area outside a portion having the function of lenses on the third surface, an area outside a portion having the function of lenses on the fourth surface, an area of the first light shielding wall facing the first surface, and an area of the second light shielding wall facing the fourth surface is roughened, and wherein at least one of an area of the light shielding member facing the second surface and an area thereof facing the third surface is roughened.