Patent ID: 7936516

Claim:
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; and 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, 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, the erecting equal-magnification lens array plate receiving light from a line light source facing the first surface and forming an erect equal-magnification image of the line light source on an image plane facing the fourth surface, the erecting equal-magnification lens array plate comprising: a first light shielding wall provided upright to surround the first lens; a second light shielding wall provided upright to surround the fourth lens; a first aperture defined by the first light shielding wall and formed above the first lens; and a second aperture defined by the second light shielding wall and formed above the fourth lens, wherein at least one of the first aperture and the second aperture is formed such that the aperture diameter facing the lens is larger than the aperture diameter on the opposite side.