The present disclosure relates to imaging of infrared light employing non-linear frequency upconversion and scanning of phase match condition to obtain a large field- of-view. Video frame rate direct detection of infrared object light can thereby be realized. One embodiment relates to a system for detection of infrared object light, the system comprising an non-linear medium configured for receiving 1) monochromatic infrared object light, and 2) seed light, and mixing the monochromatic infrared object light, and the seed light for frequency upconversion of the monochromatic infrared object light inside the non-linear medium, and a detector unit for imaging the upconverted object light, wherein system is configured to vary the phase match condition of the non-linear medium during image acquisition in the detector unit such that acquisition of one image in a sequence of images corresponds to image integration over a plurality of phase match conditions of the non-linear medium.
|IPC||G01J 3/ 45 A I|
|Country||International Bureau of the World Intellectual Property Organization (WIPO)|
|Publication status||Published - 20 Feb 2020|