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Before starting to image, take the following steps to set up the lens to a state close to being
focused:
In the lens specification, find the distance from the lens mounting flange surface to its
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principle plane.
Determine the magnification for your application = sensor pixel size (5 µm) / object pixel
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size in µm.
Use the lens specification to find the actual lens focal length, F. Often this value varies
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slightly from the one advertised.
Calculate the distance from the front face of the camera to the lens flange using the
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following formula:
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Camera Face to Flange = F (1+1 / m) – 12 mm – Principle Plane to Flange (From lens spec.)
With the focusing helical in the center of its range, assemble your extension tubes such that
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their total length equals the Camera Face to Flange distance.
Install the lens on the focusing helical and the lens assembly on to the camera.
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Calculate the distance from the object surface you intend to image to the front face of the
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camera using the following formula:
Object Surface to Camera Face = F x (2 + m + 1 / m) + HH' – 12 mm
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(Note: HH' is the distance between the two principle planes of the lens. You can get this
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from the lens specifications.)
Adjust the camera squarely to the object surface with the Object Surface to Camera Face
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distance equal to the value determined above.
The lens setup should now be good enough to use during camera evaluation. Fine
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adjustment of the focusing helical should be all that is required to get the image in focus at
the desired magnification.
Establishing Camera Communications
Power up the camera and observe the LED which indicates the following status conditions:
LED State
Off
Constant Red
Blinking Red
Blinking Orange
Blinking Green
Constant Green
When the camera status indicator LED state is a constant green, the camera is ready to start the
first instance of CamExpert.
1. CamExpert will search for installed Sapera devices.
2. In the Devices list area on the left side of the window, the connected frame grabber will be shown.
3. Select the frame grabber device by clicking on the name
18 •
Description
Camera is not powered up or is waiting for the software to start.
The camera BIST status is not good. See BIST status for diagnosis. CamExpert can be
used to get the BIST value from the camera.
The camera has shut down due to a temperature problem.
Powering Up. The microprocessor is loading code.
Hardware is good but the CLHS connection has not been established or has recently
been broken.
The CLHS Link has been established and data transfer may begin.
The Piranha XL Camera
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