Abstract: The multiplexer/demultiplexer has a planar reflector, a planar first filter element and a planar second filter element offset from the first filter element in a first direction to receive light reflected and transmitted from a first location on the first filter element. The first and second filter elements have orthogonal surface normals. The reflector is parallel to the second filter element and is offset therefrom in a second direction, orthogonal to first direction, to receive light reflected and transmitted from a second location, offset from the first location in the second direction, on the first filter element. The first and second filter elements each transmit and reflect light in non-overlapping wavelength ranges, and one of them has a band-pass or band-stop transmission characteristic.

Abstract: The multiplexer/demultiplexer has a planar reflector, a planar first filter element and a planar second filter element offset from the first filter element in a first direction to receive light reflected and transmitted from a first location on the first filter element. The first and second filter elements have orthogonal surface normals. The reflector is parallel to the second filter element and is offset therefrom in a second direction, orthogonal to first direction, to receive light reflected and transmitted from a second location, offset from the first location in the second direction, on the first filter element. The first and second filter elements each transmit and reflect light in non-overlapping wavelength ranges, and one of them has a band-pass or band-stop transmission characteristic.

Abstract: A light modulation assembly and an image projector utilizing a plurality of such light modulation assemblies are disclosed. The light modulation assembly includes an optical element, a pre-polarization filter, an image modulator, and an analyzer polarization filter. The optical element has an input port for receiving a light beam. The optical element directs the light beam onto the pre-polarization filter that removes light having a linear polarization in a first direction. The light leaving the pre-polarization filter illuminates the image modulator. The light leaving the image modulator is filtered by the analyzer polarization filter to remove light having a linear polarization with a predetermined direction relative to the first direction. The light leaving the analyzer polarization filter exits the optical element through an output port. A plurality of such assemblies can be combined with a beam splitting assembly to provide an image projector.