E
electromagnetic interface (EMI)
Also called radio-frequency interference (RFI) when in the radio frequency spectrum, is a disturbance generated by an external source that affects an electrical circuit by electromagnetic induction, electrostatic coupling, or conduction.
See also , radio-frequency interface (RFI).
EMI
See Electromagnetic interference (EMI).
F
fiducial
An object placed in the field of view of an imaging system that appears in the image produced, for use as a point of reference or a measure. It may be either something placed into or on the imaging subject, or a mark or set of marks in the reticle of an optical instrument.
Field of View (FOV)
The region of the metrology stage being viewed by the camera and displayed on the video monitor.
Field of View (FOV) Measurement
A video measurement performed in a single field of view without moving the stage or camera.
focus
The condition which provides the sharpest image. Achieved by optimizing the distance between the object and imaging optics.
FOV
See Field of View.
I
Illumination
T he energy of light (ε) striking a surface of specific unit area per unit time.
L
LED
See light emitting diode.
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