PD8835_15 Datasheet, PDF (15/24 Pages) Renesas Technology Corp – 7300 PIXELS × 3 COLOR CCD LINEAR IMAGE SENSOR

μ PD8835
DEFINITIONS OF CHARACTERISTICS
1. Saturation voltage: Vsat
The output signal voltage at which the response linearity is lost
2. Saturation exposure: SE
Product of intensity of illumination (lx) and storage time (s) when saturation of output voltage occurs
3. Photo response non-uniformity: PRNU1
The output signal non-uniformity of all the valid pixels when the photosensitive surface is applied with the light of
uniform illumination. This is calculated by the following formula, and it is defined by each twelve of them.
Δx
PRNU1 (%) =
× 100
X
VOUT
1825
Σ xj
j=1
x=
1825
Δx : maximum of | xj − x |
xj : Output voltage of valid pixel number j
Register Dark
DC level
x
PRNU1(-)
Δx
PRNU1(+)
4. Average dark signal: ADS
Average output signal voltage of all the valid pixels at light shielding. This is calculated by the following formula, and
it is defined by each twelve of them.
ADS (mV) =
1825
Σ dj
j=1
1825
dj : Dark signal of valid pixel number j
5. Dark signal non-uniformity: DSNU
Absolute maximum of the difference between ADS and voltage of the highest or lowest output pixel of all the valid
pixels at light shielding. This is calculated by the following formula, and it is defined by each twelve of them.
DSNU (mV) : maximum of | dj − ADS | j = 1 to 1825
dj : Dark signal of valid pixel number j
VOUT
Register Dark
DC level
ADS
DSNU
Data Sheet S20220EJ1V0DS
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