Patent ID: 7830606
Filing Date: 2010-11-09
Classification: G02B

Abstract:
1. A crystallization device which homogenizes a light intensity distribution of incident laser light by an optical device for homogenizing a light intensity distribution of incident pulsed laser light, changes the homogenized pulsed laser light into pulsed laser light having a light distribution of an inverse peak pattern, and crystallizes non-singlecrystalline film by irradiating the film with the pulsed laser light, wherein the optical device for homogenizing a light intensity distribution includes a first cylindrical lens array in which a plurality of first lens segments each having a first radius of curvature and a first width so as to divide laser light into a plurality of light components are arranged, and second lens segments each having a second radius of curvature different from the first radius of curvature and a second width different from the first width, and provided in at least one position of the first cylindrical lens array so as to be interposed between adjacent the first lens segments.