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| Measuring attenuation of light: Optimum pathlength defining factor at significant photon noise | Parent topic |
Fig. 2. Dependence on cz, where c is the attenuation coefficient and z is the pathlength, of the lower bound of the relative error in the attenuation coefficient, <dc>/<c>, Eq. 5 (blue curve) when the photon noise of the transmitted light power is significant. This dependence is calculated for the instrumental noise (parameter e in Eq. 5) equivalent to 0.9 times the average number of the signal photons. It is compared to the dependence of the pathlength-dependent factor in the Eq. 3 (red curve) for the relative error dc/c of the attenuation coefficient on the nondimensional optical pathlength, cz, (i.e. the optical thickness) of the medium.
| CITATION: Swanson N. L., Jonasz M. 2007. Measuring attenuation of light: Optimum pathlength defining factor at significant photon noise (www.tpdsci.com/Tpc/AtnCfMsOptmPlenFig2.php). In: Top. Part. Disp. Sci. (www.tpdsci.com). |
HISTORY: Published: 21-Nov-2007 Modified: 18-Dec-2007 Peer-reviewed: 22-Dec-2007 |
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