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Basic radiometry and SNR eq. for CCD, ICCD - UNIS

Basic radiometry and SNR eq. for CCD, ICCD - UNIS

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The Rayleigh (1)<br />

Consider a cylindrical column of cross-sectional<br />

area 1 m 2 extending away from the detector into<br />

the source.<br />

The volume emission rate from a volume<br />

element of length dl at distance l is<br />

ǫ(l, t, λ) photons m −3 s −1 . The contribution to Lγ is<br />

given by:<br />

(2)<br />

dLγ =<br />

ǫ(l, t, λ)<br />

4π<br />

dl<br />

<br />

photons<br />

s m2 <br />

sr<br />

<strong>UNIS</strong> 2011-11-15 – p. 21

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