ICX248AL Datasheet, PDF (11/20 Pages) Sony Corporation – Diagonal 8mm (Type 1/2) CCD Image Sensor for EIA Black-and-White Video Cameras

ICX248AL
Image Sensor Characteristics Measurement Method
Measurement conditions
1) In the following measurements, the device drive conditions are at the typical values of the bias and clock
voltage conditions. (When used with substrate bias external adjustment, set the substrate voltage to the
value indicated on the device and connect VDSUB pin to GND or leare it open.)
2) In the following measurements, spot blemishes are excluded and, unless otherwise specified, the optical
black (OB) level is used as the reference for the signal output, and the value measured at point [^∗A] in the
drive circuit example is used.
Definition of standard imaging conditions
1) Standard imaging condition I:
Use a pattern box (luminance: 706cd/m², color temperature of 3200K halogen source) as a subject.
(Pattern for evaluation is not applicable.) Use a testing standard lens and image at F8. The luminous
intensity to the sensor receiving surface at this point is defined as the standard sensitivity testing luminous
intensity. (IR cut filter is not applicable.)
2) Standard imaging condition II:
Image a light source (color temperature of 3200K) with a uniformity of brightness within 2% at all angles.
Use a testing standard lens and the luminous intensity is adjusted to the value indicated in each testing
item by the lens diaphragm. (IR cut filter is not applicable.)
1. Sensitivity
Set to standard imaging condition I. After selecting the electronic shutter mode with a shutter speed of
1/500s, measure the signal output (Vs) at the center of the screen and substitute the value into the
following formula.
S = Vs ×
500
60
[mV]
2. Saturation signal
Set to standard imaging condition II. After adjusting the luminous intensity to 10 times the intensity with the
average value of the signal output, 200mV, measure the minimum value of the signal output.
3. Smear
Set to standard imaging condition II. Adjust the luminous intensity to 500 times the intensity with the
average value of the signal output, 200mV. When the readout clock is stopped and the charge drain is
executed by the electronic shutter at the respective H blankings, measure the maximum value (VSm [mV])
of the signal output and substitute the value into the following formula.
Sm =
VSm
200
×
1
500
×
1
10
× 100 [%] (1/10V method conversion value)
4. Video signal shading
Set to standard imaging condition II. Adjust the luminous intensity so that the average value of the signal
output is 200mV. Then measure the maximum (Vmax [mV]) and minimum (Vmin [mV]) values of the signal
output and substitute the values into the following formula.
SH = (Vmax – Vmin)/200 × 100 [%]
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