Dual Spectral Imager with No Moving Parts

摘要

A device images radiation from a scene in two wavelength bands. An uncooled detector of the radiation includes two separate detector regions. A first filter associated with the first detector region allows radiation in a first wavelength band to be imaged on the first detector region. A second filter associated with the second detector region allows radiation in a second wavelength band to be imaged on the second detector region. An image forming optical component forms an image of the scene on the detector. Two wedge-shaped components are positioned at a fixed distance from the image forming optical component. Each wedge-shaped component directs radiation from the scene through the image forming optical component onto the detector. The radiation is imaged separately onto the two detector regions through an f-number of less than approximately 1.5. Imaged radiation on each detector region includes radiation in one respective wavelength band.

主权项

1. A device for imaging radiation from a scene, the radiation including at least a first and second wavelength band, the device comprising:
(a) a detector of the radiation from the scene, the detector being uncooled and including a first and second detector region, the first and second detector regions being separate; (b) a first and a second filter, the first filter associated with the first detector region for allowing radiation in the first wavelength band to be imaged on the first detector region, the second filter associated with the second detector region for allowing radiation in the second wavelength band to be imaged on the second detector region; and (c) an optical system for focusing the radiation from the scene onto the detector, the optical system comprising:
an image forming optical component for forming an image of the scene on the detector, and(ii) first and second substantially wedge-shaped components, the first wedge-shaped component associated with the first filter, the second wedge-shaped component associated with the second filter, each of the wedge-shaped components fixedly positioned at a distance from the image forming optical component, each of the wedge-shaped components directing radiation from a field of view of the scene through the image forming optical component onto the detector, such that the radiation is imaged separately onto the first and second detector regions through an f-number of the optical system of less than approximately 1.5, the imaged radiation on each of the detector regions including radiation in one respective wavelength band.