Projection illumination system with tunnel integrator and field lens
First Claim
Patent Images
1. An illumination system, comprising:
- a light source producing illumination light;
a tunnel integrator disposed to homogenize the illumination light, the tunnel integrator having an input end and an output end;
a tunnel integrator field lens disposed proximate the output end of the tunnel integrator;
at least one imager disposed to receive the illumination light;
a relay lens system disposed between the tunnel integrator field lens and the at least one imager to relay the illumination light from the tunnel integrator to the at least one imager, the relay lens system comprising at least a first relay lens; and
a first aperture stop disposed between the first relay lens and the at least one imager.
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Abstract
A projector illumination system includes a tunnel integrator incorporated with a field lens at its output end. One advantage of using the field lens is to form an image of the entrance end of the tunnel integrator at the secondary stop of the illumination system when combined with other relay and/or imager field lenses in the illumination system. This reduces vignetting, resulting in an increased uniformity of illumination, and increased light throughput.
31 Citations
58 Claims
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1. An illumination system, comprising:
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a light source producing illumination light;
a tunnel integrator disposed to homogenize the illumination light, the tunnel integrator having an input end and an output end;
a tunnel integrator field lens disposed proximate the output end of the tunnel integrator;
at least one imager disposed to receive the illumination light;
a relay lens system disposed between the tunnel integrator field lens and the at least one imager to relay the illumination light from the tunnel integrator to the at least one imager, the relay lens system comprising at least a first relay lens; and
a first aperture stop disposed between the first relay lens and the at least one imager. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. An illumination system, comprising:
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a light source producing illumination light;
a tunnel integrator disposed to homogenize the illumination light, the tunnel integrator having an input end and an output end;
a tunnel integrator field lens disposed proximate the output end of the tunnel integrator, the tunnel integrator field lens being a negative lens;
at least one imager disposed to receive the illumination light;
a relay lens system disposed between the tunnel integrator field lens and the at least one imager to relay the illumination light from the tunnel integrator to the at least one imager, the relay lens system comprising at least a first relay lens. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40)
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41. An illumination system, comprising:
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a light source producing illumination light;
a tunnel integrator disposed to homogenize the illumination light, the tunnel integrator having an input end and an output end;
a tunnel integrator field lens disposed proximate the output end of the tunnel integrator;
at least one imager disposed to receive the illumination light;
a relay lens system disposed between the tunnel integrator field lens and the at least one imager to relay the illumination light from the tunnel integrator to the at least one imager, the relay lens system comprising at least a first relay lens; and
a first aperture stop disposed between the tunnel integrator field lens and the at least one imager, the input end of the tunnel integrator being substantially imaged at the first aperture stop. - View Dependent Claims (42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58)
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Specification