DUAL SPECTRAL IMAGER WITH NO MOVING PARTS AND DRIFT CORRECTION METHOD THEREOF

摘要

A device images radiation from a scene. An image forming optical component forms an image of the scene on an uncooled detector having two separate regions. A first filter allows radiation in a first wavelength band to be imaged on the first detector region. A second filter allows radiation in a second wavelength band to be imaged on the second detector region, Two fixedly positioned wedge-shaped components each direct radiation from the scene through the image forming optical component onto the detector through an f-number of less than 1.5. A blackbody source positioned within, the.device reduces drift induced by -environmental, changes surrounding the devices. The blackbody source projects radiation through one of the wedge- shaped components onto a region of the detector that does not receive radiation from the scene. Pixel signals produced from the scene radiation are modified based on pixel signals produced from the blackbody.