Method and apparatus for color synthesis

Apparatus for the practice of a process for color synthesis by optical mixing by a plurality of colors and varying the relative intensity of at least one of the colors for the purpose of producing a great number of hues over a spectral range, the process comprising:

• using optical means for suppling exclusively two colors, one of which (red-violet) described by a first transmission curve has, in the spectral range between about 300 and 580 nm, an intensity or transmission maximum between 370 and 460 nm and a minimum between 540 and 580 nm, from which minimum said first transmission curve first rises steeply up to about 620 nm to a value of the order of magnitude of the maximum, and from then on rises continuously less steeply into the infrared range above 780 nm, and the other of which ("green") decribed by a second transmission curve has, in the spectral range between about 300 and 670 nm, a transmission maximum between 520 and 560 nm and a minimum between 640 and 670 nm, from which minimum said second transmission curve rises continuously to a transmission value which, at 750 to 770 nm, lies approximately in the range of the maximum, and using optical means for mixing the two colors;
• the apparatus comprising:
• (a) two light sources for the emission each of a focused light beam, a first green filter (G1) being disposed in the vicinity of one of the light sources, and a first red-violet filter (R1) being disposed in the vicinity of the other light source, and the colored beams being directed against an at least partially common surface,
• (b) two defined openings disposed in this common surface in close adjacency to one another, in a second green filter (G2) being disposed in one opening and a seond red-violet filter (R2) being disposed in the other opening, the second green filter (G2) being disposed on a side of the light source with the first green filter (G1) and the second red-violet filter (R2) on the side of the light source with the first red-violet filter (R1),
• (c) the two beams overlapping fully in an area of the second red-violet filter (R2) and overlapping in an area of the second green filter (G2) on approximately half of the side facing the second red-violet filter (R2) and
• (d) a projection surface disposed approximately parallel to the common surface at a distance "d", this distance "d" being selected such that the colored light rays emerging from the second filters (G2, R2) partially overlap.

Apparatus for the practive of the process for color synthesis by optical mixing by a plurality of colors and varying the relative intensity of at least one of the colors for the purpose of producing a great number of hues over a spectral range, the process comprising:

• using optical means for supplying exclusively two colors, one of which (red-violet) described by a first transmission curve has, in the spectral range between about 300 and 580 nm, an intensity or transmission maximum between 370 and 460 nm and a minimum between 540 and 580 nm, from which minimum said first transmission curve first rises steeply up to about 620 nm to a value of the order of magnitude of the maximum, and from then on rises continuously less steeply into the infrared range above 780 nm and the other of which ("green") described by a second transmission curve has, in the spectral range between about 300 and 670 nm, a transmission maximum between 520 and 560 nm and a minimum between 640 and 670 nm, from which minimum said second transmission curve rises continuously to a transmission value which, at 750 to 770 nm, lies approximately in the range of the maximum, and using optical means for mixing the two colors, the apparatus comprising:
• (a) two light sources for the emission each of a focused light beam, a first green filter (G1) being disposed in the vicinity of one the light sources, and a first red-violet filter (R1) being disposed in the vicinity of the other light source, and the colored beams being directed aganist an at least partially common surface,
• (b) two defined openings disposed in this common surface in close adjacency to one another, a second green filter (G2) being disposed in one opening and a second red-violet filter (R2) being disposed in the other opening, the second green filter (G2) being disposed on a side of the light source with the first green filter (G1) and the second red-violet filter (R2) on the side of the light source with the first red-violet filter (R1),
• (c) the two beams overlapping fully in an area of the second red-violet filter (R2) and overlapping in an area of the second green filter (G2) on approximately half of the side facing the second red-violet filter (R2), and
• (d) a projection surface disposed approximately parallel to the common surface at a distance "d", this distance "d" being selected such that the colored light rays emerging from the second filters (G2, R2) partially overlap, for the production of a mixed light from the colors "green" and "red-violet" for use as correction means in color projection;
• the apparatus comprising:
• one green filter and one red-violet filter disposed side by side in a common mounting, which can be moved gradually by means of the mounting, in accordance with the color proportions desired in the mixed light, through the beam of a light source.

Apparatus for the practice of a process for color synthesis by optical mixing by a plurality of colors and varying the relative intensity of at least one of the colors for the purpose of producing a great number of hues over a spectral range, the process comprising:

• using optical means for supplying exclusively two colors, one of which (red-violet) decribed by a first transmission curve has, in the spectral range between about 300 and 580 nm, an intensity or transmission maximumn between 370 and 460 nm and a minimum between 540 and 580 nm, from which minimum said first transmission curve first rises steeply up to about 620 nm to a value of the order of magnitude of the maximum, and from then on rises conitnuously less steeply into the infrared range above 780 nm, and the other of which ("green") described by a second transmission curve has, in the spectral range between about 300 and 670 nm, a transmission maximum between 520 and 560 nm and a minimum between 640 and 670 nm, from which minimum said second transmission curve rises continuously to a transmission value which, at 750 to 770 nm, lies approximately in the range of the maximum, and using optical means for mixing the two colors;
• the apparatus comprising:
• (a) two light sources for the emission each of a focused light beam, a first green filter (G1) being disposed in the vicinity of one of the light sources, and a first red-violet filter (R1) being disposed in the vicinity of the other light sources, and the colored beams being directed against an at least partially common surface,
• (b) two defined openings disposed in this common surface in close adjacency to one another, a second green filter (G2) being disposed in one opening and a second red-violet filter (R2) being disposed in the other opening, the second green filter (G2) being disposed on a side of the light source with the first green filter (G1) and the second red-violet filter (R2) on the side of the light source with the first red-violet filter (R1),
• (c) the two beams overlapping fully in an area of the second red-violet filter (R2) and overlapping in an area of the second green filter (G2) on approximately half of the side facing the second red-violet filter (R2), and
• (d) a projection surface disposed approximately parallel to the common surface at a distance "d", this distance "d" being selected such that the colored light rays emerging from the second filters (G2,R2) partially overlap, the color filters being in the form of complementary step filter.

Apparatus for the practice of a process for color synthesis by optical mixing by a plurality of colors and varying the relative intensity of at least one of the colors for the purpose of producing a great number of hues over a spectral range, the process comprising:

• using optical means for supplying exclusively two colors, one of which (red-violet) described by a first transmission curve has, in the spectral range between about 300 and 580 nm, an intensity or transmission maximum between 370 and 460 nm and a minimum between 540 and 580 nm, from which minimum said first transmission curve first rises steeply up to about 620 nm to a value of the order of magnitude of the maximum, and from then on rises continuously less steeply into the infrared range above 780 nm, and the other of which ("green") described by a second transmission curve has, in the spectral range between about 300 and 670 nm, a transmission maximum between 520 and 560 nm and a minimum between 640 and 670 nm, from which minimum said second transmission curve rises continuously to a transmission value which, at 750 to 770 nm, lies approximately in the range of the maximum, and using optical means for mixing two colors;
• the apparatus comprising:
• (a) two light sources for the emission each of a focused light beam, a first green filter (G1) being disposed in the vicinity of one of the light sources, and a first red-violet filter (R1) being disposed in the vicinity of the other light source, and the colored beams being directed against an at least partially common surface,
• (b) two defined openings disposed in this common surface in close adjacency to one another, a second green filter (G2) being disposed in one opening and a second red-violet filter (R2) being disposed in the other opening, the second green filter (G2) being disposed on a side of the light source with the first green filter (G1) and the second red-violet filter (R2) on the side of the light source with the first red-violet filter (R1),
• (c) the two beams overlapping fully in an area of the;
• second red-violet filter (R2) and overlapping in an area of the second green filter (G2) on approximatly half of the side facing the second red-violet filter (R2), and
• (d) a projection surface disposed approximately parallel to the common surface at a distance "d", this distance "d" being selected such that the colored light rays emerging from the second filters partially overlap, the color filters being in the form of complementary wedge filters.

Apparatus for the practice of a process for color synthesis by optical mixing of a plurality of colors and varying the relative intensity of at least one of the colors for the purpose of producing a great number of hues over a spectral range, comprising:

• using optical means for supplying exclusively two colors, one of which described by a first transmission curve has, in the spectral range between about 300 and 580 nm, an intensity or transmission maximum between 370 and 460 nm and a minimum between 540 and 580 nm, from which minimum said first transmission curve first rises steeply up to about 620 nm to a value of the order of magnitude of the maximum, and from then on rises continuously less steeply into the infrared range above about 780 nm, and the other of which ("green") described by a second transmission curve has, in the spectral range between about 300 and 670 nm, a transmission maximum between 520 and 560 nm and a minimum between 640 and 670 nm, from which minimum said second transmission curve rises continuously to a transmission value which, at 750 to 770 nm, lies approximately in the range of the maximum, and using optical means for mixing the two colors;
• the apparatus comprising:
• (a) two light sources for the emission each of a focused light beam, a first green filter (G1) being disposed in the vicinity of one of the light sources, and a first red-violet filter (R1) being disposed in the vicinity of the other light source, and the colored beams being directed against an at least partially common surface,
• (b) two defined openings disposed in this common surface in close adjacency to one another, a second green filter (G2) being disposed in one opening and a second red-violet filter (R2) being disposed in the other opening, the second green filter (G2) being disposed on a side of the light source with the first green filter (G1) and the second red-violet filter (R2) on the side of the light source with the first red-violet filter (R1),
• (c) the two beams overlapping fully in an area of the second red-violet filter (R2) and overlapping in an area of the second green filter (G2) on approximately half of the side facing the second red-violet filter (R2), and
• (d) a projection surface disposed approximately parallel to the common surface at a distance "d", this distance "d" being selected such that the colored light rays emerging from the second filters (G2, R2) partially overlap, area proportions of exclusively two transparent or reflective color areas (R,G) being selected in predetermined ratios between 0 and 100% and between 100 and 0%, respectively, and the color areas (R,G) being disposed in at least one reference surface.