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A CMOS lock-in pixel image sensor with embedded storage diodes and lateral electric field modulation (LEFM) of photo-generated charge is developed for fluorescence lifetime imaging. The time-resolved CMOS image sensor (CIS) with two-tap lock-in pixels achieves a very high time resolution of 10 ps when images are averaged over 30 frames, a very short intrinsic response time of 180 ps at 374 nm, and...
In this paper, the authors propose sector scan ground-based synthetic aperture radar (GB-SAR) technique for real-time monitoring of wide-ranging landslides. The non-linear movement of the antenna which moves along a sector to form a wide scanning area makes the azimuth properties complicated. Geometric model of the antenna movement is established to derive the slant range expression. Further, the...
Geosynchronous orbit synthetic aperture radar (GEO-SAR) has a good application prospect for its shorter repeat period and a wider swath compared to low Earth orbit SAR. Doppler characteristic of the echo is analyzed. The Doppler history varies frequently in space and approximates a high order signal. A back projection algorithm for high resolution GEO-SAR based on satellite-ground geometry model is...
A novel compressive sensing (CS) based non-uniformity correction (NUC) technique for focal plane array (FPA) imaging system is proposed. Instead of estimating NUC parameters from video sequence at 100% sensors in FPA, only 40% sensors are selected via CS measurement matrix for real-time NUC estimation and CS reconstruction algorithm is exploited to obtain NUC compensation table for 100% sensors. In...
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