OIA_09_detectors_00.pdf - Detectors Optics Imaging A...

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Detectors Optics & Imaging A
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Cameras (area detectors) Canon Hamamatsu
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CCDs Advantages: High fill fraction High quantum e ciency
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Photodiodes Basic photodiode: [ p-doped ] - [ undoped/intrinsic semiconductor ] - [ n-doped ] 1.14 band gap (eV) 0.67 2.26 (0.75 - 1.4) 0.7 (0.75 - 1.4) 0.3
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Photodiodes Basic photodiode: [ p-doped ] - [ undoped/intrinsic semiconductor ] - [ n-doped ] Common reverse-bias operation (linear response):
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CMOS Active pixel sensor: A photodiode and amplifier at each pixel.
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CMOS Fill fraction can be an issue, but back-illumination helps a lot
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EMCCD Good for very low light applications but sCMOS has somewhat closed the gap
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sCMOS Dual amplifiers per pixel to expand dynamic range
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Comparing EMCCD wins for ultra low read noise and QE . sCMOS wins for speed and dynamic range . CCD is intermediate on many parameters (cheaper and more pixels than EMCCD).
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Photography and cinema cameras Bayer filters (most common) Dichroic splitting to 3 sensors Red 8192 x 4320 x 60 fps = 2.12 gigapixels per sec Canon 19,580 x 12,600 = 247 megapixel
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Shuttering Rolling shutter vs.
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