Patent ID: 8233207
Filing Date: 2012-07-31
Classification: G02B

Abstract:
1. A method for optically correcting field position distortions created by at least one scanning head comprising the steps of: (a) at least one of constructing, setting, and positioning a light beam generation apparatus to cause a beam of light to enter a scanning head and be deflected by optics and mirrors to a target plane; (b) executing a series of logic commands to generate marks using the beam of light and a scanning head control apparatus to set an optimum working distance and parallelity between the scanning head and the target plane; (c) at least one of constructing, setting, and positioning the scanning head and the target plane; (d) executing a series of logic commands to generate a predetermined number of marks per a first axis and a second axis using the beam of light and the scanning head control apparatus, wherein the marks are identified, measured, and inputted into a logic means, and wherein the logic means calculates adjustments and sets at least one of a central scanning angle position and scale for at least one motor; (e) executing another series of logic commands to generate a predetermined number of marks using the beam of light and the scanning head control apparatus, wherein the marks are identified, measured and inputted into a logic means, and wherein the logic means calculates adjustments for optical distortions and sets correction data for the at least one motor to correct for the optical distortions; and (f) executing another series of logic commands to generate a design using the beam of light and the scanning head control apparatus, wherein the design is identified, measured and inputted into a logic means, and wherein the logic means calculates, adjustments, and sets a scale of the optical distortion correction data for the at least one motor.