Method and apparatus for calibrating artwork from a direct imagi

Details Method and apparatus for calibrating artwork from a direct imagi Method and apparatus for calibrating artwork from a direct imagi

1988-03-07

1989-09-19

McGraw, Vincent P.

Optics: measuring and testing

By polarized light examination

With light attenuation

356243, G01B 1100

Patent

active

048675660

ABSTRACT:
A novel method and apparatus for determining the accuracy of artwork produced from a laser direct imaging system employs a calibration substrate which has images of opposed, perpendicular scales and registration marks thereon. The overall system dimensional error is determined directly from substrate measurements, as is the magnitude of the mechanical and processing errors.

REFERENCES:
patent: 4639142 (1987-01-01), Chow et al.

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