Color projection system

Claim 1

A SYSTEM FOR SIMULTANEOUSLY CONTROLLING POINT BY POINT THE INTENSITY OF EACH OF A PAIR OF PRIMARY COLOR COMPONENTS IN A BEAM OF LIGHT IN RESPONSE TO RESPECTIVE ELECTRICAL SIGNALS COMPRISING: (A) A LIGHT MODULATING MEDIUM, (B) MEANS FOR DIRECTING SAID BEAM TO SAID LIGHT MODULATING MEDIUM, (C) MEANS FOR SIMULTANEOUSLY PRODUCING TWO SETS OF DEFORMATIONS IN SAID MEDIUM, THE DEFORMATIONS IN EACH SET BEING ARRANGED IN UNIFORMLY SPACED SIMILARLY DIRECTED LINES TO FORM RESPECTIVE LIGHT DIFFRACTION GRATING, THE LINES IN EACH SET EXTENDING IN THE SAME DIRECTION, ONE OF SAID DIFFRACTION GRATINGS HAVING A LINE TO LINE SPACING SMALLER THAN THE OTHER OF SAID GRATINGS, (D) SAID SETS OF DEFORMATIONS FORMING A THIRD DIFFRACTION GRATING OF LINE TO LINE SPACING WHICH IS UNIFORM AND GREATER THAN THE LINE TO LINE SPACING OF EITHER OF SAID OTHER GRATINGS, (E) MEANS FOR CONTROLLING THE AMPLITUDE OF THE LINES OF DEFORMATION OF SAID ONE GRATING IN RESPONSE TO THE ONE OF SAID ELECTRICAL SIGNALS CORRESPONDING TO THE ONE OF SAID COLOR COMPONENTS OF LONGER WAVELENGTHS, (F) MEANS FOR CONTROLLING THE AMPLITUDE OF LINES OF DEFORMATION OF THE OTHER OF SAID GRATINGS IN RESPONSE TO THE OTHER OF SAID ELECTRICAL SIGNALS, (G) A LIGHT MASK POSTIONED IN THE PATH OF LIGHT TRANSMITTED FROM SAID MEDIUM, SAID MASK HAVING AT LEAST THREE TRANSPARENT PORTIONS, EACH OF SAID PORTIONS BEING SUCCESSIVELY DISPLACED IN POSITION FROM THE PATH OF UNDEVIATED LIGHT FROM SAID MEDIUM, (H) THE ONE OF SAID TRANSPARENT PORTIONS ADJACENT SAID UNDEVIATED PATH BEING POSITIONED AND OF EXTENT IN THE DIRECTION OF DEVIATION TO PASS FIRST ORDER LIGHT OF SAID COLOR COMPONENTS DIFFRACTED BY SAID THIRD GRATING AND TO PASS FIRST ORDER LIGHT OF SAID OTHER COLOR COMPONENT DIFFRACTED BY SAID OTHER GRATING, (I) THE NEXT ADJACENT ONE OF SAID TRANSPARENT PORTIONS BEING POSITIONED AND OF EXTENT IN THE DIRECTION OF DEVIATION TO PASS FIRST ORDER LIGHT OF SAID ONE COLOR COMPONENT DIFFRACTED BY SAID ONE GRATING AND SECOND ORDER LIGHT OF SAID OTHER COMPONENT DIFFRACTED BY SAID OTHER GRATING, (J) THE THIRD OF SAID TRANSPARENT PORTIONS BEING POSITIONED AND OF EXTENT IN THE DIRECTION OF DEVIATION TO PASS SUBSTANTIALLY SECOND ORDER LIGHT OF SAID ONE COLOR COMPONENT DIFFRACTED BY SAID ONE GRATING.

Claim 2

A SYSTEM FOR SIMULTANEOUSLY CONTROLLING POINT BY POINT THE INTENSITY OF EACH OF A PAIR OF PRIMARY COLOR COMPONENTS IN A BEAM OF LIGHT IN RESPONSE TO RESPECTIVE ELECTRICAL SIGNALS COMPRISING: (A) A LIGHT MODULATING MEDIUM, (B) MEANS FOR DIRECTING SAID BEAM TO SAID LIGHT MODULATING MEDIUM, (C) MEANS FOR SIMULTANEOUSLY PRODUCING TWO SETS OF DEFORMATIONS IN SAID MEDIUM, THE DEFORMATIONS IN EACH SET BEING ARRANGED IN UNIFORMLY SPACED SIMILARLY DIRECTED LINES TO FORM RESPECTIVE LIGHT DIFFRACTION GRATING, THE LINES IN EACH SET EXTENDING IN THE SAME DIRECTION, ONE OF SAID DIFFRACTION GRATINGS HAVING A LINE TO LINE SPACING SMALLER THAN THE OTHER OF SAID GRATINGS, (D) SAID SETS OF DEFORMATIONS FORMING A THIRD DIFFRACTION GRATING OF LINE TO LINE SPACING WHICH IS UNIFORM AND GREATER THAN THE LINE TO LINE SPACING OF EITHER OF SAID OTHER GRATINGS, (E) MEANS FOR CONTROLLING THE AMPLITUDE OF THE LINES OF DEFORMATION OF SAID ONE GRATING IN RESPONSE TO THE ONE OF SAID ELECTRICAL SIGNALS CORRESPONDING TO THE ONE OF SAID COLOR COMPONENTS OF LONGER WAVELENGTHS, (F) MEANS FOR CONTROLLING THE AMPLITUDE OF LINES OF DEFORMATION OF THE OTHER OF SAID GRATINGS IN RESPONSE TO THE OTHER OF SAID ELECTRICAL SIGNALS, (G) A LIGHT MASK POSTIONED IN THE PATH OF LIGHT TRANSMITTED FROM SAID MEDIUM, SAID MASK HAVING AT LEAST THREE TRANSPARENT PORTIONS, EACH OF SAID PORTIONS BEING SUCCESSIVELY DISPLACED IN POSITION FROM THE PATH OF UNDEVIATED LIGHT FROM SAID MEDIUM, (H) THE ONE OF SAID TRANSPARENT PORTIONS ADJACENT SAID UNDEVIATED PATH BEING POSITIONED AND OF EXTENT IN THE DIRECTION OF DEVIATION TO PASS FIRST ORDER LIGHT OF SAID COLOR COMPONENTS DIFFRACTED BY SAID THIRD GRATING AND TO PASS FIRST ORDER LIGHT OF SAID OTHER COLOR COMPONENT DIFFRACTED BY SAID OTHER GRATING, (I) THE NEXT ADJACENT ONE OF SAID TRANSPARENT PORTIONS BEING POSITIONED AND OF EXTENT IN THE DIRECTION OF DEVIATION TO PASS FIRST ORDER LIGHT OF SAID ONE COLOR COMPONENT DIFFRACTED BY SAID ONE GRATING AND SECOND ORDER LIGHT OF SAID OTHER COMPONENT DIFFRACTED BY SAID OTHER GRATING, (J) THE THIRD OF SAID TRANSPARENT PORTIONS BEING POSITIONED AND OF EXTENT IN THE DIRECTION OF DEVIATION TO PASS SUBSTANTIALLY SECOND ORDER LIGHT OF SAID ONE COLOR COMPONENT DIFFRACTED BY SAID ONE GRATING.