Basic radiometry and SNR eq. for CCD, ICCD - UNIS
Basic radiometry and SNR eq. for CCD, ICCD - UNIS
Basic radiometry and SNR eq. for CCD, ICCD - UNIS
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<strong>SNR</strong> <strong>for</strong> a <strong>CCD</strong><br />
• Measured signal-to-noise ratio:<br />
<strong>SNR</strong><strong>CCD</strong> = DN signal<br />
DN noise<br />
• For an ideal photon detector:<br />
• <strong>and</strong> <strong>for</strong> a <strong>CCD</strong>:<br />
<strong>SNR</strong><strong>CCD</strong> ≈<br />
<strong>SNR</strong>γideal =<br />
≈ n e − γ<br />
〈n e −<br />
<strong>CCD</strong> 〉<br />
<br />
n e − γ<br />
n e − γ<br />
<br />
n e − + n e − + 〈n e −〉 2 <strong>UNIS</strong> 2011-11-15 – p. 53
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