PD8670_15 Datasheet, PDF (20/30 Pages) Renesas Technology Corp – 7400 PIXELS CCD LINEAR IMAGE SENSOR

µ PD8670
10. Register imbalance : RI
The rate of the difference between the averages of the output voltage of Odd and Even pixels, against the average
output voltage of all the valid pixels.
n
2
∑ ²
n
(V2j – 1 – V2j)
j=1
RI (%) =
n
∑ ¹
n ^Vj
j=1
× 100
n : Number of valid pixels
Vj : Output voltage of each pixel
11. Random noise : σ
Random noise σ is defined as the standard deviation of a valid pixel output signal with 100 times (= 100 lines)
data sampling at dark (light shielding).
σ (mV) =
100
Σ ^{(Vi – V)2}
i=1
100
Σ ^{1 100}
, V=
Vi
100 _{i = 1}
Vi : A valid pixel output signal among all of the valid pixels
VOUT
V1
line 1
V2
line 2
V100
line 100
This is measured by the DC level sampling of only the signal level, not by CDS (Correlated Double Sampling).
12. Shot noise : σ shot
Shot noise is defined as the standard deviation of a valid pixel output signal with 100 times (= 100 lines) data
sampling in the light. This includes the random noise.
The formula is the same with that of random noise.
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Data Sheet S16749EJ1V0DS