LQ-200CL
12
6. Functions and Operation
6.1. Basic functions
Fig.9 Signals flow
The LQ-200CL uses four high-performance CCD line scan image sensors mounted on a prism block.
During exposure, the incoming light is converted to electrons (electric charge) in the photodiodes
(active pixels). The transfer gate controls the transfer of charge from photodiodes to the shift
register. Activating the transfer gate terminates the exposure cycle, transfers the charge to the
Horizontal Shift Register (2-phase buried channel CCD shift register) and starts a new exposure
cycle. The line is subsequently read out in a single sequence starting with pixel 1.
The exposure time is normally the same as the cycle time (in No-Shutter mode). By using the
Exposure Control Gate (in Shutter-Select or Pulse Width Control trigger modes) the exposure time
can be individually set to be shorter than the cycle time (the inverse of line rate). This also allows
a fixed exposure time, independent of the line rate. In the LQ-200CL the exposure time can be set
individually for all four channels.
Fig.10 Sensor layout
Dichroic
Prism
Color
Separation
Light
AMP
ADC
Auto black, DSNU, PRNU, Shading,
Fine Gain, Line Matrix, Knee, Noise
reduction, User black
M
P
X
D
ig
ita
l B
in
nin
g
M
U
X
/
C
am
er
a
lin
k
IF
AMP
ADC
Auto black, DSNU, PRNU, Shading,
Fine Gain, Line Matrix, Knee, Noise
reduction, User black
AMP
ADC
Auto black, DSNU, PRNU, Shading,
Fine Gain, Line Matrix, Knee, Noise
reduction, User black
AMP
ADC
Auto black, DSNU, PRNU, Shading,
Fine Gain, Line Matrix, Knee, Noise
reduction, User black
OUT
PUT
300
400
500
600
700
800
900
1000
300
400
500
600
700
800
900
1000
300
400
500
600
700
800
900
1000
300
400
500
600
700
800
900
1000
Fa
ke
_O
B1
0
Fa
ke
_O
B1
9
Fa
ke
_O
B1
8
Fa
ke
_O
B1
7
Fa
ke
_O
B1
6
Fa
ke
_O
B1
5
Fa
ke
_O
B1
4
Fa
ke
_O
B1
3
Fa
ke
_O
B1
2
Fa
ke
_O
B1
1
TP
3
TP
2
AP
20
47
AP
20
46
AP
20
45
AP
20
44
・
・
・
・
・
・
・
・
Is
o0
Is
o2
Is
o1
2075
I so : I sol ati on St ages
OB : Opt i cal Bl ack Pi xel s
AP : Act i ve Pi xel s
TP : Tr ansi t i on Pi xel s
・・ ・ ・ ・ ・ ・ ・ ・
AP
3
AP
2
AP
1
AP
0
10
2
2048
2
10
3
Anti bloomi ng/Exposure Control Gate
OB
0
OB
1
OB
2
OB
3
OB
4
OB
5
OB
6
OB
7
OB
8
OB
9
TP
0
TP
1
Transfer Gate
2-Phase Buried Channel CCD Shift Register
Output