| 摘要 |
A hybrid solid state imaging focal plane array (FPA) for night vision systems achieves a high dynamic range from deeply overcast starlight to full daylight by interleaving non-avalanche photodiode (NAP) pixels with APD pixels in a single imaging plane controlled by a common readout circuit. The APD pixels provide high performance at low light levels, while the NAP pixels provide unsaturated images in full daylight. The APD pixels can be Discrete. In low light the readout circuit can disable the NAP pixels and interpolate the NAP pixels using the APD signals. In daylight the readout circuit can do the opposite. The FPA can be digitally fused with sensors in a separate plane such as InGaAs APD's that detect wavelengths outside of the visible band. The NAP pixels can outnumber the APD pixels, for example by three-to-one. The APD's can be silicon for visible light, or InGaAs for SWIR light.
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