Method for image alignment

Details Method for image alignment Method for image alignment

1973-10-09

1976-03-30

Smith, Alfred E.

Optics: measuring and testing

Angle measuring or angular axial alignment

Sides of angle or axes being aligned transverse to optical...

356172, G01B 904

Patent

active

039471268

ABSTRACT:
Disclosed is an apparatus and method which permits a manufacturer to precisely place a desired image on a screen to be used in a screen printing process. This result is accomplished by establishing a predetermined relationship between the screen frame and the image positive from which the image is to be formed on the screen. The method requires providing indicia of translational and rotational orientation on the image positive and aligning the image positive with respect to the screen frame by adjusting the position of the image positive in light of the location of separately-provided reference indicia located in a predetermined position with respect to the screen frame. Aligning the image positive indicia with the reference indicia is most easily accomplished by providing a microscope through which respective pairs of indicia may be observed simultaneously. The disclosed apparatus provides a means for readily performing the above steps.

REFERENCES:
patent: 3175458 (1965-03-01), Da Costa
patent: 3672778 (1972-06-01), Kern
patent: 3752589 (1973-08-01), Kobayashi
Strong, John, Procedures in Experimental Physics, Prentice-Hall, Inc., New York, 1938, pp. 585-586.

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