Patent ID: 9373927
Filing Date: 2016-06-21
CPC Classification: B23K,B29D,G01B,G01J,G02B,H01S

Claim Text:
1. A method of designing an optical component for shaping laser light, which includes a pair of aspheric lenses and shapes an intensity distribution of incident laser light with different divergence angles into a desired intensity distribution so as to generate emitted laser light, the method comprising: measuring the intensity distribution of the incident laser light; dividing the measured intensity distribution of the incident laser light in a distribution direction so as to obtain a plurality of incident light division areas, for each of a short-axial direction and a long-axial direction of the incident laser light, in an incident aspheric lens of the pair of the aspheric lenses; dividing an intensity distribution of the emitted laser light in a distribution direction, so as to obtain a plurality of emitted light division areas by adjusting a height of each of the plurality of incident light division areas and simultaneously adjusting a width and a position of the distribution direction of each of the plurality of incident light division areas according to the desired intensity distribution, for each of the short-axial direction and the long-axial direction, in an emitting aspheric lens of the pair of the aspheric lenses; specifying a light path from a position of the distribution direction of the plurality of incident light division areas in the incident aspheric lens and a corresponding position of the distribution direction of the plurality of emitted light division areas in the emitting aspheric lens for each of the short-axial direction and the long-axial direction; obtaining shapes in the short-axial direction and the long-axial direction of the pair of the aspheric lenses from the light path; performing approximation of a high-order polynomial of the shapes in the short-axial direction and long-axial direction of the pair of the aspheric lenses, so as to obtain high-order polynomials of the short-axial direction and the long-axial direction; correcting the high-order polynomial of the short-axial direction or the high-order polynomial of the long-axial direction by using a correction coefficient based on a rotary angle of a radius vector of the incident laser light, a ratio defined by a radius vector of the long-axial direction and a radius vector of the short-axial direction of the incident laser light, and a ratio defined by the shape in the long-axial direction and the shape in the short-axial direction for each of the pair of the aspheric lens, so as to obtain the corrected high-order polynomial; and obtaining shapes of the pair of the aspheric lenses based on the corrected high-order polynomial.