Abstract
Optics between two micro convex lens arrays (MCLA) with an aperture of 0.23mm diameter made from poly- (methyl methacrylate) has been investigated. In the first MCLA, the inverted images focused by lenses were the same as the image focused by the center lens, regardless of location. When the second MCLA was superposed on the first MCLA, if both of the MCLAs had the same lens pitch, no image appeared in the second MCLA, but if there is a slight difference between lens pitches of the two MCLAS, the inverted images focused by many lenses in the first MCLA were arranged as an image by shining lenses in the second MCLA. When the lens pitch of the first MCLA (l1) was larger than the lens pitch of the second MCLA (l2) (l1 > l2), the image appeared as an upright one, and when l1<l2, the image appeared as an inverted one. If the second MCLA was rotated, the image in l1>l2 leaned toward the rotational direction with decreasing size, and the image in l1<l2 stood up toward the reverse direction against the rotational direction with decreasing size. Every image which appeared in the second MCLA was observed at the rate of one in a pattern formed by Moiré fringes between the pitch of inverted images focused by lenses of the first MCLA and the pitch of lenses of the second MCLA. The formation mechanisms of those images were discussed in detail.
