DRO (digital read out)
A numeric display with an integrated keyboard and some means of numeric representation. Its integral computer reads signals generated by linear encoders installed to track X, Y, and Z axis, using these measures to keep track of and display to a machine operator the workpiece position. E
encoder
A device that converts a signal into a digital code. Encoders are commonly used to measure the position, speed, or direction of rotation of a shaft or object, and to convert this motion into digital signals that can be processed by digital electronics systems. F
focus
The condition that 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
See field of view.
FOV measurement
A video measurement performed in a single field of view without moving the stage or camera.
frames per second (fps)
The number of images, shorts, or frames that a camera can take per second.
H
HDMI (high-definition multimedia interface)
A proprietary audio/video interface for transmitting uncompressed video data and compressed or uncompressed digital audio data from an HDMI-compliant source device, such as a display controller, to a compatible computer monitor, video projector, digital television, or digital audio device. I
illumination, back
Lighting applied from the back of the object so as to create a silhouette when the object is viewed by the camera.
illumination, front
Lighting applied to the object from the same side as the camera so that surface
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