Patent ID: 8584561
Filing Date: 2013-11-19
Classification: B21D,B26D,B26F,G02B,Y10T

Abstract:
1. A method for manufacturing an imaging element comprising a flat substrate with a plurality of vertical micro through-holes, each having two inner mirror surfaces perpendicularly arranged for bending a light beam passing through the hole such that a real image of an object or a projected image disposed in the space facing one side of the flat substrate is formed in a space facing the other side, comprising: providing a blade section in which a plurality of punch blades is arranged to project from a block, each punch blade defined by a first side, a second side, a third side, and a fourth side, the first side and the second side being adjacent to each other and defining a first corner at an upper surface of the punch blade, the second side and third side being adjacent to each other and defining a second corner at an upper surface of the punch blade, the third side and the fourth side being adjacent to each other and defining a third corner at an upper surface of the punch blade, and the fourth side and the first side being adjacent to each other and defining a fourth corner at an upper surface of the punch blade, wherein the first side and the second side correspond to the mirror surfaces, the first corner is a tip of the punch blade and is disposed further from the block than the second corner, the third corner, and the fourth corner, and the upper surface of the punch blade is a portion of the punch blade opposite to an end of the punch blade which abuts the block; pressing the blade section into contact with the substrate while ultrasonically vibrating the blade section, wherein the blade section is pressed into contact with the substrate such that the tips of the punch blades contact the substrate before any other portion of the punch blades; and punching the substrate with the punch blades.