mn3666a Panasonic Corporation of North America, mn3666a Datasheet - Page 4

• Manufacturer Part Number: mn3666a
• Description: 7500-bit High-speed High-resolution Ccd Linear Image Sensor
• Manufacturer: Panasonic Corporation of North America

CCD Linear Image Sensor
Note 1) Responsivity (R)
Note 2) Photo response non-uniformity (PRNU)
Note 3) Bit non-uniformity (BNU)
Note 4) Saturation output voltage (V
Note 5) Saturation Exposure (SE)
Note 6) Dark signal output voltage (V
Note 7) Dark signal non-uniformity (DSNU)
Note 8) Shift register total transfer efficiency (STTE)
Note 9) Dynamic range (DR)
Note 10) Modulation transfer function (MTF
Optical Characteristics (continued)
This is the value obtained by dividing the average output voltage (V) of the 7500 valid pixels by the exposure (lx·s).
The exposure (lx·s) is the product of the illumination intensity (lx) and the accumulation time (s).
Since the responsivity changes with the spectral distribution of the light source used, care should be taken when using a
light source other than the daylight type fluorescent lamp specified in the inspection conditions.
The photo response non-uniformity (PRNU) is defined by the following equation, where X
of the valid 7500 pixels and x is the absolute value of the difference between the maximum and minimum voltage, when
the surface of the photo-sites is illuminated with light having a uniform distribution over the entire surface.
The incident light intensity shall be 50% of the standard saturation llight intensity.
This is defined by the following equation where the output voltage of each pixel among the7500 pixels is denoted by Xi (i
= 1 to 7500) when the photodetector region is illuminated by a light of uniform illumination intensity distribution, and the
average output voltage of the pixels near the ith pixel is denoted by X
10 pixels after that pixel). Here, the max. operation consists of comparing with the absolute value and assigning the sign
of the numerator.
The incident light intensity shall be 50% of the standard saturation llight intensity.
This is the output voltage at the point beyond which it is not possible to maintain the linearity of the photoelectric
conversion characteristics as the exposure is increased. (The exposure at this point is called the saturation exposure.)
This is the exposure beyond which it is not possible to maintain the linearity of the output voltage as the exposure is
increased. When designing the equipment using these devices, make sure that the incident light exposure is set with
sufficient margin so that the CCD never gets saturated.
This is defined as the average of the output from the 7500 active pixels in the dark condition at Ta=25˚C, T
normally the dark signal output voltage gets doubled for every 8 to 10˚C increase in Ta and is proportional to T
necessary to convert the value if Ta andT
below.)
This is defined as the difference between the maximum value among the output voltages from the 7500 valid pixels at
Ta=25˚C and T
This is given by the following equation where the average output voltage of all the 7500 pixels is denoted by X
larger of the output voltages of the 2 dummy pixels following the dummy pixel D4 is denoted by X
photodetector region is illuminated by a light of uniform illumination intensity distribution.
This is defined by the following equation.
Since the dark signal output voltage is proportional to the accumulation time, the dynamic range becomes wider when the
accumulation time is shorter. This value is not a guaranteed value, but is merely a reference value.
This is defined by the following equation where the average output voltages of the pixels with the white pattern and the
pixels with the black pattern are respectively denoted by V
black and white patterns alternate at every pixel) is projected on the photodetector region in phase (equivalent to the
Nyquist spatial frequency).
This value is a measure of resolution of the sensor.
This parameter is not a guaranteed value but is
merely a reference value.
PRNU=
BNU=max. (
DR= V
MTF =
STTE=
R
V
SAT
DRK
int
X
=10ms and V
V –V
V +V
X
W
W
ave.
X
ave
x
Xi – X
ave.
– X
X
B
B
local-ave.
r
local-ave.
100 (%)
SAT
100 (%)
DRK
DRK
100 (%)
)
)
. (See the figure below.)
)
R
)
100 (%)
int
are different from the inspection conditions given above. (See the figure
V
DSNU
DRK
Output waveform
of CCD
Pattern on
photodetector
W
and V
B
local-ave.
when a black and white stripe pattern (in which the
(a total of 20 pixels with 10 pixels before and
ave
is the average output voltage
V
B
MN3666A
int
V
W
Zero level
=10ms. Since
r
ave.
when the
and the
int
, it is