National Institute of Standards and Technology (NIST)
A physical sciences laboratory and a non-regulatory agency of the United States Department of Commerce. Its mission is to promote innovation and industrial competitiveness. NIST's activities are organized into laboratory programs that include nanoscale science and technology, engineering, information technology, neutron research, material measurement, and physical measurement.
NIST
See National Institute of Standards and Technology.
parcentricity
The condition where a feature remains at the optical center of the video image throughout the magnification range of zoom optics.
parfocality
The condition where the video image remains in focus as the magnification is adjusted from highest to lowest with zoom optics.
pixel
A picture element. Term used to describe the individual light detectors of the CCD sensor in the camera and the individual light emitters of an LCD video monitor.
repeatability
The three-sigma variation of multiple readings on the same object that is positioned at multiple locations across the field of view.
resolution
The least significant digit to which a physical quantity can be read. High resolution does not imply high accuracy.
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.
standard
In metrology, an object that has a defined relationship to a unit of measurement of a physical quantity. Standards are the fundamental reference for a system of weights and measures, against which all other measuring devices are compared.
system PC
A space saving personal computer where all electronics, disk drives and I/O connections are in the same enclosure. Also referred to as a small form factor PC.
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.
Made with FlippingBook - professional solution for displaying marketing and sales documents online