Material	PbS	PbSe
Number of photosensitive element	256	256
Spectral range, µm	0.5?.0	3.0?.0
Detectivity (lpeak), W-1 cm Hz1/2	≥ 4?011	≥ 3?010
Voltage responsivity, V/W	≥ 3?08	≥ 1?07
Input signal range, dB	≥ 60	≥ 60
Number of operating elements, %	≥ 95	≥ 95
Time constant, µsec	≤ 3	≤ 0.03

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