Projection illumination system with tunnel integrator and field lens
First Claim
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1. An optical system, comprising:
- a tunnel integrator having an input end and an output end;
an integrator field lens disposed at the output end of the tunnel integrator, the integrator field lens having a negative optical power; and
a relay lens system disposed on an optical path from the integrator field lens.
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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
23 Claims
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1. An optical system, comprising:
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a tunnel integrator having an input end and an output end; an integrator field lens disposed at the output end of the tunnel integrator, the integrator field lens having a negative optical power; and a relay lens system disposed on an optical path from the integrator field lens. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An optical system, comprising:
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a tunnel integrator having an input end and an output end; an integrator field lens disposed at the output end of the tunnel integrator; a relay lens system disposed on an optical path from the integrator field lens, the relay lens system comprising at least a first lens; and and a first aperture stop on the optical path, the first lens of the relay lens system being disposed on the optical path between the integrator field lens and the aperture stop. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. An optical system, comprising:
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a tunnel integrator having an input end and an output end; an integrator field lens disposed at the output end of the tunnel integrator; a relay lens system disposed on an optical path from the integrator field lens, the relay lens system comprising at least a first relay lens and forming an image of the output end of the tunnel integrator; a first aperture stop disposed on an optical path from the integrator field lens, the input end of the tunnel integrator being imaged at the first aperture stop. - View Dependent Claims (18, 19, 20, 21, 22, 23)
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Specification