TWO F-NUMBER, TWO-COLOR SENSOR SYSTEM

摘要

A sensor system (20) senses a scene (22) and includes a dual-band imaging infrared detector (34) lying on a beam path (28), wherein the infrared detector (34) detects infrared images in a first infrared wavelength band and in a second infrared wavelength band; and a two-color cold-shield filter (38) lying on the beam path (28) between the infrared detector (34) and the scene (22). The cold-shield filter (38) 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.