Fig. 1. Mechanical scanning structures. (a) Rotating scanning imaging model; (b) swinging mirror scanning imaging model

Fig. 2. Examples of scanning super-large field-of-view infrared imaging in the satellite field. (a) HJ-1B satellite^[11]; (b) (c) demonstration of scanning-type super-large field-of-view infrared imaging effects by the multispectral scanner onboard HJ-1B satellite^[11]; (d) schematic diagram of the scanning system structure of the infrared imaging radiometer on board Suomi NPP^[16]; (e) (f) scanning-type super-large field-of-view infrared imaging effects demonstration by the infrared imaging radiometer onboard Suomi NPP^[17]

Fig. 3. Splice-type super-large field-of-view imaging. (a) Splice imaging theoretical model; (b) GPNVG-18 physical and unilateral imaging effect demonstration^[26]; (c) large field-of-view angle infrared night vision instrument developed by Yantai Arrow Optoelectronics Science and Technology Co. Ltd.^[27]; (d) spliced super-large field-of-view imaging effects of the coastal belt imager on the HY-1D satellite^[28]; (e) disassembled parts of the IRACE prototype^[29]; (f) IRACE prototype imaging effects and resolution test^[29]

Fig. 4. Gaze-type super-large field-of-view imaging. (a) Theoretical optical path and lens design cross-section of a gaze-type super-large field-of-view infrared lens using non-similar imaging theory^[41]; (b) structural design of a general gaze-type super-large field-of-view infrared lens^[42]; (c) design of a pinhole-type gaze-type super-large field-of-view infrared lens, as well as the complete system structure, and a demonstration of the imaging effect^[43]

Fig. 5. Effects of corner point detection. (a) Harris algorithm^[52]; (b) Susa algorithm^[53]; (c) Shi-Tomasi algorithm^[54]

Fig. 6. Physical structure of a multiple field-of-view spliced imaging system. (a) Type of splicing design; (b) focal plane splicing effect of the IKONOS system from NASA^[69]