Typical Setup And Evaluation; Optical Configuration; Camera Timing & Control; Acquiring An Image - Teledyne Linea 2K CL User Manual

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 that you are likely to use in your application. To do this, take the
following steps:
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
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distance. Use the formula lens focal length x (2 + 1/magnification + magnification) to
calculate this distance. Magnification equals the sensor pixel size (7.04 µm or 3.52 µm ) /
(your object pixel size in µm).
The approximate position of the sensor is at the first groove on the side of the camera case
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from the front face of the camera.
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.
If this line rate is too slow for your application, you will get a compressed image in the scan
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direction. To increase the line rate, use the Internal Line Rate parameter in the Camera
Control category.
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.
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Acquiring an Image

You can now begin imaging. Unless you have an application employing lots of light, the image is
likely to be too dark.
Use the system gain to adjust the camera output to achieve the desired response. The
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system gain range is from 1x to 10x. Refer to the Gain and Black Level (Offset) section.
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
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the camera is calibrated.
Calibration is performed using a white reference where your object is normally located.
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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 Linea camera under your operating
conditions.
22 • Camera Operation
Linea CL Series Camera