參數(shù)資料
型號: UPD8884ACY-A
廠商: NEC Corp.
英文描述: (10680 PIXELS x 4 LINES) x 3 COLOR CCD LINEAR IMAGE SENSOR
中文描述: (1.068萬像素× 4行)× 3彩色CCD線性圖像傳感器
文件頁數(shù): 17/28頁
文件大小: 285K
代理商: UPD8884ACY-A
Data Sheet S17546EJ1V0DS
17
μ
PD8884A
DEFINITIONS OF CHARACTERISTIC ITEMS
1. Saturation voltage :
V
sat
Output signal voltage at which the response linearity is lost.
Photo pixel and CCD register electron saturate level.
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 :
PRNU
The output signal non-uniformity of all the valid pixels when the photosensitive surface is applied with the light
of uniform illumination. PRNU of 4800 dpi is calculated by the following formula.
PRNU
OUT
(%) =
y =
y
j
: Output voltage of valid pixel number j
IO : Number of outside valid pixels (21360 bits)
y
x : maximum of
y
j
y
j = 1
y
IO
IO
y
j
×
100
Δ
Δ
PRNU
IN
(%) =
x =
x
j
: Output voltage of valid pixel number j
IV : Number of inside valid pixels (21360 bits)
x
x : maximum of
x
j
x
j = 1
x
IV
IV
x
j
×
100
Δ
Δ
The following figure shows output waveform of 4800 dpi mode.
x
Register Dark
DC level
V
OUT
x
Δ
y
y
Δ
Inside 2400 dpi data set
Outnside 2400 dpi data set
4. Average dark signal :
ADS
Average output signal voltage of all the valid pixels at light shielding. This is calculated by the following
formula.
ADS (mV) =
d
j
: Dark signal of valid pixel number j
Valid pixels
j = 1
Vaild pixels
d
j
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