Two F-number, two-color sensor system
First Claim
1. A sensor system for sensing a scene, the sensor system comprising:
- a dual-band imaging detector lying on a beam path from the scene, wherein the detector detects images in a first wavelength band and in a second wavelength band; and
a two-color cold-shield filter lying on the beam path between the detector and the scene, wherein a first filter portion of the cold-shield filter passes light of the first wavelength band and the second wavelength band, and a second filter portion of the cold-shield filter does not pass light of the first wavelength band and passes light of the second wavelength band.
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Accused Products
Abstract
A sensor system senses a scene and includes a dual-band imaging infrared detector lying on a beam path, wherein the infrared detector detects infrared images in a first infrared wavelength band and in a second infrared wavelength band; and a two-color cold-shield filter lying on the beam path between the infrared detector and the scene. The cold-shield filter defines a first aperture size for infrared light of the first infrared wavelength band, and a second aperture size larger than the first aperture size for infrared light of the second infrared wavelength band. The first infrared wavelength band has wavelengths less than wavelengths of the second infrared wavelength band.
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Citations
20 Claims
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1. A sensor system for sensing a scene, the sensor system comprising:
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a dual-band imaging detector lying on a beam path from the scene, wherein the detector detects images in a first wavelength band and in a second wavelength band; and
a two-color cold-shield filter lying on the beam path between the detector and the scene, wherein a first filter portion of the cold-shield filter passes light of the first wavelength band and the second wavelength band, and a second filter portion of the cold-shield filter does not pass light of the first wavelength band and passes light of the second wavelength band. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A sensor system for sensing a scene, the sensor system comprising:
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a dual-band imaging infrared detector lying on a beam path from the scene, wherein the infrared detector detects infrared images in a first infrared wavelength band and in a second infrared wavelength band;
a two-color cold-shield filter lying on the beam path between the infrared detector and the scene, wherein a circular first filter portion of the cold-shield filter passes infrared light of the first infrared wavelength band and the second infrared wavelength band, wherein the first infrared wavelength band comprises wavelengths less than wavelengths of the second infrared wavelength band, and an annular second filter portion of the cold-shield filter does not pass infrared light of the first infrared wavelength band and passes infrared light of the second infrared wavelength band, and wherein an outer diameter of the circle is an inner diameter of the annulus; and
a cooler housing enclosing the infrared detector and the cold-shield filter, wherein the cooler housing includes a window to admit the beam path to an interior of the cooler housing. - View Dependent Claims (12, 13, 14, 15, 16)
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17. A sensor system for sensing a scene, the sensor system comprising:
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a dual-band imaging infrared detector lying on a beam path, wherein the infrared detector detects infrared images in a first infrared wavelength band and in a second infrared wavelength band; and
a two-color cold-shield filter lying on the beam path between the infrared detector and the scene, wherein the cold-shield filter defines a first aperture size for infrared light of the first infrared wavelength band, and a second aperture size larger than the first aperture size for infrared light of the second infrared wavelength band, wherein the first infrared wavelength band comprises wavelengths less than wavelengths of the second infrared wavelength band.
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18. A sensor system for sensing a scene, the sensor system comprising:
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a dual-band imaging infrared detector lying on a beam path from the scene, wherein the infrared detector detects infrared images in a first infrared wavelength band and in a second infrared wavelength band; and
a two-color cold-shield filter lying on the beam path between the infrared detector and the scene, wherein a first filter portion of the cold-shield filter passes infrared light of the first infrared wavelength band and the second infrared wavelength band, and a second filter portion of the cold-shield filter does not pass infrared light of the first infrared wavelength band and passes light of the second infrared wavelength band. - View Dependent Claims (19, 20)
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Specification