Two-stage projection system
First Claim
1. A two-stage image combining projection system, comprising:
- a one-to-one relay system for combining radiation from first and second spectral band image sources, said relay system including a spectral combining module to combine the radiation from said first and second spectral band image sources, a spherical primary module and a secondary spherical module;
a combining projector comprising a beam combiner and a projection optics system;
wherein the spherical primary module reflects the combined radiation from the spectral combining module onto the spherical secondary module, this combined radiation in turn reflected off the secondary module back onto the primary module, the primary module in turn focussing the combined radiation reflected off the secondary module at the beam combiner; and
wherein the beam combiner combines the combined radiation from the spectral combining module with radiation from a third image source providing radiation in a third spectral band to provide a single combined image.
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Accused Products
Abstract
A high efficiency, high performance full color projection system. The system includes a one-to-one relay and a refractive projection lens system. The one-to-one relay combines the outputs from two different spectral image sources, such as blue and red image sources. The refractive projection lens further combines the output from a third spectral image source, such as a green image source, with the combined images from the other two image sources relayed through the one-to-one relay to produce a single output. The one-to-one relay includes three modules, a spherical primary module, a spherical secondary module and a spectral combining module. The refractive projection lens system includes a beam combiner and a projection optics.
14 Citations
26 Claims
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1. A two-stage image combining projection system, comprising:
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a one-to-one relay system for combining radiation from first and second spectral band image sources, said relay system including a spectral combining module to combine the radiation from said first and second spectral band image sources, a spherical primary module and a secondary spherical module; a combining projector comprising a beam combiner and a projection optics system; wherein the spherical primary module reflects the combined radiation from the spectral combining module onto the spherical secondary module, this combined radiation in turn reflected off the secondary module back onto the primary module, the primary module in turn focussing the combined radiation reflected off the secondary module at the beam combiner; and wherein the beam combiner combines the combined radiation from the spectral combining module with radiation from a third image source providing radiation in a third spectral band to provide a single combined image. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A two-stage image combining projection system, comprising:
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a one-to-one relay system for combining radiation from long and short spectral band image sources, said relay system including a spectral combining module to combine the radiation from said long and short spectral band image sources, a spherical primary module and a secondary spherical module, said spectral combining module including an X-prism; a combining projector comprising a beam combiner and a projection optics system; wherein the spherical primary module reflects the combined radiation from the spectral combining module onto the spherical secondary module, this combined radiation in turn reflected off the secondary module back onto the primary module, the primary module in turn focussing the combined radiation reflected off the secondary module at the beam combiner; and wherein the beam combiner combines the combined radiation from the spectral combining module with radiation from a third image source providing radiation in a third spectral band intermediate said long and short bands to provide a single combined image. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22)
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23. A one-to-one relay system for combining radiation from first, second and third spectral band image sources, said relay system including:
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a spectral combining module to combine the radiation from said first, second and third spectral band image sources; a spherical primary module; and a secondary spherical module including a convex mirror and an axial chromatic correction element for compensating chromatic aberration introduced by the spectral combining module; wherein the spherical primary module reflects the combined radiation from the spectral combining module onto the spherical secondary module, this combined radiation in turn reflected off the secondary module back onto the primary module, the primary module in turn focussing the combined radiation reflected off the secondary module. - View Dependent Claims (24, 25, 26)
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Specification