Integrated optical polarization combining prism for projection displays

A system, comprising:

• a light source;
• a housing coupled to the light source;
• a first LCoS assembly coupled to the housing, the first LCoS assembly including:
• a first polarizing prism having a first face, a second face and a third face, wherein a light beam may be received incident on the first face, light having a first polarization may be output through a second face and light having a second polarization may be output through a third face;
• a half-wave plate fastened to the second face of the first polarizing prism;
• a first reflecting prism connected to the third face of the first polarizing prism, the first reflecting prism having a first face and a second face, the first face connected to the third face of the first polarizing prism;
• a second reflecting prism connected to the half-wave plate and to the second face of the first reflecting prism, the second reflecting prism having a first face, a second face and a third face, the first face of the second reflecting prism connected to the half-wave plate and the second face of the first reflecting prism;
• and
• an LCoS chip coupled to the second face of the second reflecting prism;
• a second LCoS assembly coupled to the housing, the second LCoS assembly including:
• a first polarizing prism having a first face, a second face and a third face, wherein a light beam may be received incident on the first face, light having a first polarization may be output through a second face and light having a second polarization may be output through a third face;
• a half-wave plate fastened to the second face of the first polarizing prism;
• a first reflecting prism connected to the third face of the first polarizing prism, the first reflecting prism having a first face and a second face, the first face connected to the third face of the first polarizing prism;
• a second reflecting prism connected to the half-wave plate and to the second face of the first reflecting prism, the second reflecting prism having a first face, a second face and a third face, the first face of the second reflecting prism connected to the half-wave plate and the second face of the first reflecting prism;
• and
• an LCoS chip coupled to the second face of the second reflecting prism;
• a third LCoS assembly coupled to the housing, the third LCoS assembly including:
• a first polarizing prism having a first face, a second face and a third face, wherein a light beam may be received incident on the first face, light having a first polarization may be output through a second face and light having a second polarization may be output through a third face;
• a half-wave plate fastened to the second face of the first polarizing prism;
• a first reflecting prism connected to the third face of the first polarizing prism, the first reflecting prism having a first face and a second face, the first face connected to the third face of the first polarizing prism;
• a second reflecting prism connected to the half-wave plate and to the second face of the first reflecting prism, the second reflecting prism having a first face, a second face and a third face, the first face of the second reflecting prism connected to the half-wave plate and the second face of the first reflecting prism;
• and
• an LCoS chip coupled to the second face of the second reflecting prism;
• a first beam splitter and a second beam splitter both coupled to the housing, the first beam splitter arranged to split incoming light from the beam combining element between the first LCoS assembly and the second beam splitter, the second beam splitter arranged to split incoming light between the second LCoS assembly and the third LCoS assembly;
• a first beam recombiner and a second beam recombiner both coupled to the housing, the first beam recombiner arranged to receive light from the first LCoS assembly and the second LCoS assembly, the second beam recombiner arranged to receive light from the first beam recombiner and from the third LCoS assembly;
• and
• an output optics element coupled to the housing and arranged to receive light from the second beam recombiner and to focus an output light source.