Table 1.
Comparison of a Scanning System and An Image Detection System
| Detectable photon number/unit time (Dpnt) | Detection time (Dt) | Total detectable photon number from a single capillary during a single sampling interval (Dpn) | |
| Scanning system | A × Np | C × SI/N | A × C × Np × SI/N |
| Image detection system | Np/N2 | SI × RT × N | Np × (SI/N2 − RT/N) |
| Ratio | A × C × (1/N − RT/SI) ≈ A × C/N |
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(A, C) Constants depending on the scanning optical and mechanical system; (Np) detectable photon number/unit time for static single capillary detection system; (SI) sampling interval; (N) number of capillaries; (RT) reading time of total data of the CCD element.
