JAI LQ-050CL, User Manual

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LQ-050CL
14
6. Functions and Operation
6.1. Basic functions
Fig.9 Signals flow
The LQ-050CL 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-
050CL
the exposure time can be set individually for all four channels.
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