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Camera Performance and Features
Linea Lite GigE Series Camera
Light from the object is collected into the same charge packet, resulting in a higher-contrast
picture. Charge motion in the TDI sensor must match object motion as closely as possible. Any
discrepancy will result in blurry images (Modulation Transfer Function (MTF) degradation).
Linea Lite Sensor Array
The Linea Lite camera TDI sensor arrays have two rows of pixels; one line is output which is the
summation of both rows in the array. Alternatively, the average of both rows can also be output.
Concurrent integration and digital readout may occur, however in the 4k only one row may be read
out at a time.
The sensor exposure time is 3.2 µs longer than the exposure pulse. This affects different exposure
modes as follows:
•
In internal or external programmable exposure modes the camera takes the additional
exposure time into account and matches the
sensor exposure time. The actual exposure time and the exposure time set by the user are
the same.
•
In external trigger width exposure mode the pulse is passed to the sensor. Therefore the
actual exposure time is 3.2 µs longer than the exposure time determined by the trigger.
The 4k and 2k dual row sensor timings are distinct:
•
2k sensor: exposure for rows one and two occur at the same time.
•
4k sensor: exposure and readouts are staggered.
4k Sensor
The Linea Lite 4k sensor has a 7 μm pixel, so every time the object being imaged moves 7 μm,
when using an external synchronization trigger signal (EXSYNC), the trigger should be fired each
time the object moves 7 μm.
...
...
0
4095
Line 1
Line 2
Charge
accumulation
Object
movement
(7
μ
m)
gap
(3.5
μ
m)
Figure 19: Object Movement & Charge Accumulation
In the 4k sensor exposure and readouts are staggered. The default is 50% of the previous period;
this matches the row spacing.
Figure 20: 4k Sensor Row Pulse Width Exposure
