×

PROGRAMMABLE DIFFRACTION GRATING

  • US 3,861,784 A
  • Filed: 06/29/1973
  • Issued: 01/21/1975
  • Est. Priority Date: 06/29/1973
  • Status: Expired due to Term
First Claim
Patent Images

1. A programmable diffraction grating, comprising:

  • a planar matrix array of X directional magnetic field generating elements;

    a planar matrix array of Y directional magnetic field generating Y elements;

    pairs of interacting ones of each of said X and Y elements arranged in an interacting X and Y directioned magnetic field configuration;

    X current source selection means selectively coupled to each of said X elements for selectively coupling an X selection current of selectable polarity and amplitude to a selected one of said X elements;

    Y current source selection means separately coupled to each of said Y elements for selectively coupling a Y selection current of selectable polarity and amplitude to a selected one of said Y elements;

    a plurality of coplanar stripe-domain film elements, a separate one inductively coupled to only a separate pair of said interacting X and Y elements for forming XY optical cells;

    current control means concurrently controlling said X and Y current source selection means for concurrently coupling selected X and Y selection currents of selected polarities and amplitudes to a selected one of said pairs of said interacting X and Y elements for generating in the plane of the one inductively coupled stripe-domain film element a resultant DC magnetic field HR of a predetermined direction and magnitude;

    AC field means inductiveLy coupled to said XY optical cells and coacting with the associated resultant DC magnetic fields HR for generating a selected configuration of substantially continuously different dimensioned stripe-domain wall separations in said plurality of coplanar stripe-domain film elements.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×