focus
The condition which provides the sharpest image. Achieved by optimizing the distance between the object and imaging optics.
field of view (FOV)
The region of the metrology stage being viewed by the camera and displayed on the video monitor.
FOV measurement
A video measurement performed in a single field of view without moving the stage or camera.
illumination, front
Lighting applied to the object from the same side as the camera so that surface features can be viewed on the video monitor.
illumination, back
Lighting applied from the back of the object to create a silhouette when the object is viewed by the camera.
LED
See light emitting diode.
light emitting diode (LED)
A semiconductor diode that emits light when a voltage is applied to it and that is used especially in electronic devices (as for an indicator light).
linear standard scale
In metrology, precision glass scales used for checking magnification accuracy of comparators.
mag
Shorthand for magnification.
magnification, lens
The image size in the CCD plane divided by the corresponding object size (0.14X to 4X for HDV telecentric lenses).
magnification, image
Image size on the video monitor divided by the corresponding object size. Same as lens magnification in a properly adjusted optical comparator.
MetLogix M3 software
Advanced metrology software for performing two and three axis measurements in encoder-based systems and field of view systems at high levels of precision and accuracy. M3 software is included with HDV systems.
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