Method and apparatus for correcting distortion and curvature of

Details Method and apparatus for correcting distortion and curvature of Method and apparatus for correcting distortion and curvature of

1984-05-01

1986-08-19

Corbin, John K.

350137, 350320, 350616, 350630, G02B 2702

Patent

active

046066063

ABSTRACT:
A distortion identification method which produces an undistorted rectilin cross grid pattern for comparison with any distortion and curvature of field in a display system. An undistorted rectilinear grid, representing an infocus view of the display where an observer's eye would normally be in a display system, is positioned to be optically projected by a collimating lens and the optical element back to the display focal surface. A curved cross grid pattern of the rectilinear grid is laid on a glass substrate, which is form fitted to the display focal surface, by projection photolithography. The curved cross grid pattern indicates the shape of the focal surface required to present a high resolution display emanating therefrom which is in-focus to an observer viewing the display.

REFERENCES:
patent: 3212397 (1965-10-01), Miller
patent: 4401367 (1983-08-01), Grantham et al.

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