Uniaxial crystal electric light valve compensated for divergent light

Claim 1

A DIVERGENCE AND COLOR COMPENSATED LIGHT VALVE COMPRISING IN COMBINATION A PLURALITY OF CRYSTALLINE ELEMENTS INCLUDING AMMONIUM DIHYDROGEN PHOSPHATE, ZINC FLUOSILICATE, AND POTASSIUM PERIODATE ARRANGED IN A TANDEM GROUP, EACH OF SAID ELEMENTS CUT WITH ITS MAJOR DIMENSIONS SUBSTANTIALLY PERPENDICULAR TO A COMMON OPTIC AXIS, WHEREIN THE RATIO BETWEEN THE THICKNESSES OF ZINC FLUOXILICATE AND AMMONIUM DIHYDROGEN PHOSPHATE APPROXIMATES 2.17 AND THE RATIO BETWEEN THE THICKNESSES OF POTASSIUM PERIODATE AND AMMONIUM DIHYDROGEN PHOSPHATE APPROXIMATES 0.55 TRANSLUENT CONDUCTING ELETRODES ATTACHED TO OPPOSING SURFACES OF SAID AMMONIUM DIHYDROGEN PHOSPHATE ELEMENT FOR IMPRESSING A CONTROLLING ELECTRICAL FIELD THEREACROSS, POLARIZING ELEMENTS ARRANGED AT OPPOSITE ENDS OF SAID GROUP, A LIGHT SOURCE A COLLIMATING LENS DIRECTING LIGHT FROM SAID SOURCE THROUGH A FIRST ONE OF SAID POLARIZING ELEMENTS IN THE DIRECTION OF THE OPTIC AXIS COMMON TO SAID CRYSTALLINE ELEMENTS, AND MEANS FOR UTILIZING LIGHT EMERGING FROM SAID CRYSTAL ELEMENTS THROUGH THE SECOND ONE OF SAID POLARIZING ELEMENTS.