Pixel
A picture element. Term used to describe the individual light detectors of the CCD sensor in the camera and also the individual light emitters of an LCD video monitor. The least significant digit to which a physical quantity can be read. High resolution does not imply high accuracy. A space saving PC made by Shuttle, Inc. It is small enough to be attached to the back of a system’s 24” touch-screen monitor. A wireless transceiver fits in a USB port and communicates with a wireless keyboard and mouse Misalignment of the part with respect to the X and Y axes. This will create measurement errors unless the part is repositioned or the de-skew feature of the metrology software redefines the measurement axes.
Resolution
Shuttle PC
Skew
Squareness The alignment of the camera relative to the motion of the metrology stage. If the camera is misaligned (out of square), the image will drift diagonally as the stage position is moved along one axis. Substage Lighting Illumination from below the stage glass. Used for profile or silhouette video edge measurements. Telecentric A lens property where the light from the object stays parallel to the optical axis across the entire field of view, thereby eliminating optical distortion. This can only happen if the entrance aperture of the lens is larger than the field of view, requiring a large and expensive lens.
Object
Telecentric lens
CCD detector
TFE
Tetrafluoroethylene, a self-lubricating polymer coating used on precision lead screws. Video Edge Detection, a system where a video camera and digital image processing are used to detect edges or other features. Optics which can change magnification based on a user selection. Zoom control can be manual or motorized, depending on the metrology system.
VED
Zoom Optics
P/N 6291 Rev. November 10, 2017
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