Arrangement for projection displays employing reflective light valves

Claim 3

The apparatus of claim 1 wherein said plurality of sources of colors of light include a source of blue light, a source of red light, and a source of green light, said plurality of spacial light modulators includes a first spacial light modulator, a second spacial light modulator, and a third spacial light modulator, said plurality of directing means includes a first means for directing said red light in a predetermined polarization onto said first spacial light modulator, a second means for directing said blue light in a predetermined polarization onto said second spacial light modulator; and a third means for directing said green light in a predetermined polarization onto said third spacial light modulator, and wherein said combining means includes means for combining said red light reflected from said first spacial light modulator, said blue light reflected from said second spacial light modulator and said green light reflected from said third spacial light modulator into said combined beam.

Claim 4

The apparatus of claim 1, further including a means for projecting said combined beam onto a screen.

Claim 5

The apparatus of claim 1, wherein said apparatus is an apparatus for projecting a color image onto a screen.

Claim 6

The apparatus of claim 1, wherein said plurality of means for directing each of said plurality of colors of light in a predetermined polarization includes a plurality of polarizing beam splitting prisms.

Claim 7

The apparatus of claim 1, wherein said means for combining said plurality of colors includes a color combining prism assembly having a plurality of input faces for receiving reflected light of each of said plurality of colors in a corresponding input face.

Claim 8

The apparatus of claim 1, wherein each of said plurality of means for directing each of said plurality of colors of light in a predetermined polarization are in close proximity to each of said corresponding spacial light modulators.

Claim 9

The apparatus of claim 3, wherein said combining means is positioned between said projection means and said plurality of polarization means so that light traverses said combining means in one direction only.

Claim 10

The apparatus of claim 6, wherein said color combining prism assembly is comprised of three solid glass prisms arranged to form two internal reflecting surfaces for combining three colors of light.

Claim 11

The apparatus of claim 1, wherein said means for combining said plurality of colors includes a dichroic cross prism assembly for combining three color components received in three separate input faces and outputting the combined beam through an output face.

Claim 12

The apparatus of claim 1, wherein said means for combining said plurality of colors includes a plurality of dichroic mirror prisms.

Claim 13

The apparatus of claim 11, wherein said plurality of dichroic mirror prisms includes one of said prisms for reflecting a first color and one of said prism for reflecting a second color and transmitting a third color.

Claim 14

The apparatus of claim 1, further including a plurality of field lenses each positioned between said spacial light modulators and said polarization means.

Claim 15

The apparatus of claim 1, wherein each of said plurality of means for directing each of said plurality of colors of light in a predetermined polarization are attached to each of said corresponding spacial light modulators.