| 摘要 |
PURPOSE:To accurately form a continuous uneven preform mat to a resin sheet in an almost round shape by stretching at least one stamper among a father stamper, a mother stamper and a work stamper by a predetermined distance in the uniaxial direction passing through the center of the stamper along the surface thereof. CONSTITUTION:The uneven pattern of the preform of a matrix has a round shape and the longitudinal and lateral lengths (a), (b) of the matrix are equal. Either one of stampers obtained from manufacturing processes from a known father stamper to a known work stamper is stretched at least once by a predetermined distance in the uniaxial direction passing through the center of the stamper along the surface thereof. That is, either one of stampers obtained from the manufacturing processes from the father stamper to the work stamper is stretched at least once by applying force to the stamper in a b-direction to be deformed until a predetermined a'/b' ratio is obtained and the a'/b' ratio of the uneven pattern on the work stamper can be obtained. |
