14

μ PD8821

Data Sheet S17961EJ2V0DS

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 six of them.

DSNU (mV) : maximum of | dj

− ADS | j = 1 to 3650

dj : Dark signal of valid pixel number j

Register Dark

DC level

ADS

DSNU

VOUT

6. Output impedance : ZO

Impedance of the output pins viewed from outside.

7. Response : R

Output voltage divided by exposure (lx•s).

Note that the response varies with a light source (spectral characteristic).

8. Image lag : IL

The rate between the last output voltage and the next one after read out the data of a line.

φTG

Light

VOUT

ON

OFF

VOUT

V1

IL (%) = V1 / VOUT × 100

9. 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.

RI (%) =

× 100

Σ

n

j=1

Vj

n

1

n

2

(V2j -1

− V2j)

Σ

j=1

2

n

n : Number of valid pixels

Vj : Output voltage of each pixel