Linea CLHS Series Camera
Camera Operation
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21
Typical Setup and Evaluation
Optical Configuration
Typically, the first thing you want to do is to evaluate the camera’s image quality under operating
conditions similar to those you will use in your application. To do this, take the following steps:
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The illumination, lens magnification, and focus should be set up as per you application.
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Getting the magnification right is best accomplished by setting the object-to-sensor
distance. Use the formula
lens focal length x (2 + 1/magnifi magnification)
to
calculate this distance. Magnification equals the sensor pixel size (7.04 µm or 3.52 µm ) /
(your object pixel size in µm).
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The back focal distance from the front plate to the sensor is 12 mm. For complete
mechanical specifications refer to the Mechanical Specifications section.
Camera Timing & Control
It is easiest and quickest to evaluate the camera using the internal timing setups for line rate and
exposure time. The camera starts up in the default configuration of Camera Link full, 10 kHz line
rate and 50 µsec exposure time.
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If this line rate is too slow for your application, you will get a compressed image in the scan
direction. To increase the line rate, use the Internal Line Rate parameter in the Camera
Control category.
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Adjust the exposure time; refer to the Exposure Controls section.
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Set your camera direction; refer to the Pixel Readout Direction (Mirroring Mode) section.
Acquiring an Image
You can now begin imaging.
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Use the system gain to adjust the camera output to achieve the desired response. The
system gain range is from 1x to 10x. Refer to the Gain and Black Level (Offset) section.
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Once you have a suitable response, you can now focus the lens.
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The image may be darker at the edges due to lens vignetting, but this will be improved once
the camera is calibrated.
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Calibration is performed using a white reference where your object is normally located.
Refer to the Calibrating the Camera section. When calibrated, you should see an image from
the camera that is flat field corrected with the lens at the target level you set.
You are now ready to evaluate the image quality of the camera under your operating conditions.
