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5 terms
Photonics Dictionary: G
Clear All Filters x
point image x
G x
Gauss points
->
cardinal points
Focal, nodal or principal points of a lens. If the respective distances of the object and image are measured from the cardinal points, all thin-lens equations are applicable to thick lenses.
Gaussian profile
An intensity distribution (intensity as a function of radial distance from the beam center) which is given by the Gaussian function: where: I0 is the intensity at the beam center r is the radial...
geometric image
The position and shape of the image of a point source, as predicted by geometric optics alone. The geometric image is to be differentiated from the diffraction image, which is determined from...
georectification
The superposition of satellite or aerial images with a map in order to process and remove distortion. Uses reference points from map to align and apply information.
gradient vector
In an image, the orientation and magnitude of the rate of change in intensity at any point.
Photonics Dictionary
G
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