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LC1917 Datasheet(PDF) 3 Page - PerkinElmer Optoelectronics

Part # LC1917
Description  Low-Profile Analog Line Scan Camera
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Manufacturer  PERKINELMER [PerkinElmer Optoelectronics]
Direct Link  http://www.perkinelmer.com
Logo PERKINELMER - PerkinElmer Optoelectronics

LC1917 Datasheet(HTML) 3 Page - PerkinElmer Optoelectronics

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Table 2. Camera Description
Analog Line Scan Cameras
www.perkinelmer.com/opto
DSP-205.01A - 4/2001W Page 3
and a half clock cycles prior to the end
of read out. Because there are extra
stages in the CCD sensors readout regis-
ter, a minimum number of MCLK
cycles (the number of elements on the
CCD sensor plus 41) must exist
between successive LT commands.
The maximum line-scan period is 20
milliseconds. Integration times longer
than 20 ms can introduce higher levels
of dark current, which reduces the
dynamic range of the sensor. Longer
integration times are possible, however,
if the camera is cooled, which reduces
dark current. Specific application char-
acteristics, such as light level and rate
of object motion, will determine the
optimum setting. Timing details are
shown in Figure 3.
Output Signals
The LC1917-series camera provides
three output synchronization signals:
Camera Clock (CCLK), Line Enable
(LEN), and Camera Line Transfer (CLT).
The Camera Clock (CCLK) operates at
the MCLK frequency and is synchro-
nized to the analog video. The output
of the CCLK signal can be used to cap-
ture analog video data by a frame
grabber or digitizer.
The Line Enable (LEN) signal brackets
the valid analog video. The signal
becomes high two CCLK periods before
the first valid pixel and goes low two
CCLK periods before the last valid
pixel. The video output is a contiguous
pixel data stream with a dynamic
range (defined as peak video divided
by rms pixel noise) of greater than 2500:1.
The Camera Line Transfer (CLT) output
signal is an internally generated sync
signal. Its falling edge indicates the
start of a line readout sequence. This
signal may be used for controlling
strobes, shutters or other accessories
of the users system.
Video Signals
The LC1917 camera features an
adjustable DC offset. This offset is con-
trolled by a potentiometer, located
underneath the set screw on the body
side of the camera adjacent to active
Figure 3. Camera Timing Diagram
CCLK
LT
The minimum period between LT must be 41 + 1024 CLKS or 1065 clocks
LT minimum = 1.5 CLKS
CLT
CLT equals
6 CLKS
LEN
LEN leads and trails video by 2 CLKS
Video
1024 CLKS
CLT to LEN 11 CLKS
Parameter
Variable
Description
Physical
Optical Lens
No lens adaptor - optical
Sensor Alignment
Within ±0.005” of of mounting hole
Dimensions
2” x 3.077” x 0.75”
Connector
Type
Amp C-216297
26-pin High Density Male
Cable Length
Maximum 10 meters
Power Requirements Operating Voltages
+12 VDC, +5 VDC, -12 VDC
Connection
Through 26-pin connector
Output
Data Rate
1 - 5 MHz
Type
Analog Differential Video
Connection
Through 26-pin connector
Control Signals
User Supplied
Master Clock (MCLK)
Line Transfer (LT)
User Communications
RS-422 Control Signals
Camera Supplied
Camera Clock (CCLK)
Line Enable (LEN)
Camera Line Transfer (CLT)
Connection
Through 26-pin connector
Sensor
Type
PerkinElmer RL1024PAG
Window
Glass
Operational
Gain Adjustment
5-Turn Potentiometer
Dark Offset Adjustment 5-Turn Potentiometer
Input Signals (contd.)


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