Notice: This is not a final specification.
Outline, some parametric limits and figures are subject to change.
COLOR CONTACT IMAGE SENSOR
LT3R108
SHEC SHANDONG HUALING ELECTRONICS CO.,LTD.
Beiyang Building, Torch Road, Hi-Tech. IDZ
China
Weihai
Shandong,
86-631-568-8013
Tel:
86-631-568-4988
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Fax:
E-mail: shec@163169
1.Description
This specification is applied to LT3R108 Color Contact Image Sensor module (Color CIS).
2.Scope
This LT3R108 is a Color CIS consists of a Rod Lens Array, a color LED light source and an array of linear MOS image nsor.
3.Outline
Item Specification Note Scanning width 108 mm
Sensor element density 300DPI CNT=GND
Effective number of nsor elements 1276 elements
(Full 1296elements)
11th to1286th
Scanning speed Color(RGBIR):180×4 μc/line
Black & White: 180 μc/line
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Note 1
Clock speed 8.0 MHz Note 1 Rod lens array Two rows
Light source Red λp = 630nm ± 15nm
60mA
Green λp = 520nm ± 15nm
60mA
Blue λp = 465nm ± 10nm
60mA
IR λp = 940nm ± 20nm
60 mA
HP304547 SELGUIDE
Power supply +5.0V x 80 mA
Data output 1 analog output Synchronous Block diagram Figure 5
Dimensions Figure
1
Note 1) Clock Speed f must satisfy following status:
f > (1296 +92) / tint
f: Clock speed
tint: Scanning speed
4.Image Data Output Characteristics (Ta = 25ºC )
The shipment test in SHEC is done on the condition of this table.厦门白金汉
In Color Mode
Specification
Item Symbol
Red Green Blue IR
Note
DC supply voltage VDD +5.0V Detector, Logic LED supply voltage VLED <3.0V <5.0V <5.0V许多英语
<2.0V
Constant
current LED supply current ILED 60mA 60mA 60mA 60mA
White image target 0.05 ~ 0.09 OD
Timing chart Figure 7
Video reference Vref
Dref
1100~ 1300mV 4.1
Dark output
minimum
Vdmin ≥ - 150 mV 4.2
Dark output
maximum
Vdmax ≤ + 150 mV 4.3
White output maximum Vpmax 700 ±100 mV T.B.D
4.4for the lowest
output color
White output
uniformity
UEp Less than 50% T.B.D 4.5 MTF
20%
MIN30% MIN15%MIN5%MIN 4.6 71.37lppi
Linearity Gamma
0.95~1.05
Linearity Uniformity LU Less than 7 % 4.7
In Black and White Mode
Specification
Item Symbol
Red Green Blue IR
Note
DC supply voltage VDD +5.0V Detector, Logic
LED supply voltage VLED 0V <5.0V 0V 0V
LED supply current ILED 0mA 60mA 0mA 0mA
White image target 0.05 ~ 0.09 OD
Timing chart Figure 9 Figure 11
Video reference Vref
Dref
1100~1300 mV 4.1
柴会龙
Dark output
minimum
Vdmin ≥ - 150 mV 4.2
Dark output
maximum
Vdmax ≤ + 150 mV 4.3
White output maximum Vpmax 700 ±100 mV
4.4零基础学音标
T.B.D
White output
saturation
Vpsat 1000mV T.B.D 4.9 White output
uniformity
UEp Less than 50% T.B.D 4.5 MTF 30% MIN T.B.D 4.6 71.37l lppi
The output level of image signal like white and dark and MTF is defined at the point of “ts” which described in ction 6.
A test target is t on the reading position as outlined in Figure 1.
4.1Vref
Video reference voltage.
Vref is outputted from connector pin #4. Vdmim and Vdmax are bad on Vref.
Dref
bsvDark reference voltage.
As shown in Figure 4, Dref appears from clock #72 to #79. Dref voltage is almost equal to Vref voltage.
4.2 Vdmin
As shown in Figure 2, Vdmin is the minimum value in the dark output signal (turning off the LED).
Every other parameters are defined by Vdmin as a reference.(See Fig.2)
4.3 Vdmax
As shown in Figure 2, Vdmax is the maximum value in the dark output signal (turning off the LED).
4.4 Vpmax
As shown in Figure 2, Vpmax is the maximum white output signal and is defined by: Vpmax=MAX[Vp(n)]
Vp(n) is the output signal of the nth pixel using a white image target.
4.5 UEp
UEp is the white output non-uniformity with dark signal subtracted and is defined by: UEp = ((VEpmax – VEpmin) / (VEpmax)) x 100%
VEpmax = MAX[VEp(n)]; is the maximum effective output signal
VEpmin = MIN[VEp(n)]; is the minimum effective output signal
VEp(n) is the effective output signal of every pixel and is defined by:
VEp(n) = Vp(n) – Vd(n)
4.6 MTF
MTF is defined by:avoid造句
MTF = MIN{ [(Vmax-Vmin) / VEp] } x 100%
历年考研政治国家线Vmax is the maximum output signal using the MTF test chart.
Vmin is the minimum output signal using the MTF test chart.
VEp is the effective output signal .
4.7Linearity Uniformity
LUg is measured following procedure and defined;
Step1. Test Target
The white image target is ud as a test target. This target must not be moved while this test is being operated.
Step2. LED adjustment
Tred, Tgrn,Tblu , Tir should be adjusted according to Figure 8 procedure.
Step3. Dark and White correction
Dark and White correction must be done for every each pixel.
Step4. LED turn on time t
Tred, Tgrn,Tblu and Tir should be changed as following;
,
Tblu/2
Tir/2
Tgrn/2,
Tred/2,
Step5. Compute LUg
LUg should be computed for each color as;
LUg = ⏐Dgave - Dgextm⏐
Dgave is the average of Vg(n). Vg(n) should be got more than 8 times sampling.
Step6. LED turn on time t
Tred, Tgrn and Tblu should be changed as following and compute LUg regarding to Step5;
Tred/4,
Tblu/4,
Tir/4
Tgrn/4,
Step7. LED turn on time t
Tred, Tgrn and Tblu should be changed as following and compute LUg regarding to Step5;
campus是什么意思Tred/8, Tgrn/8, Tblu/8, Tir/8
