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7 terms
Photonics Dictionary
Clear All Filters x
edge filters x
apodization
The use of a variable transmission filter at the aperture stop of a lens to modify its diffraction pattern. Reduced transmission at the center of the aperture will favor performance at high...
edge enhancement
In image processing, any operation that strengthens information about the edges of objects displayed. Three types of spatial filtering are used: shift and difference, gradient and Laplacian.
edge filter
->
bandpass filter
A filter with a transmission that is high for a particular band of frequencies, but that falls to low values above and below this band.
half-power point
1. The value on either the leading or the trailing edge of a laser pulse at which the power is one-half of its maximum value. 2. The wavelength at which a filter is transmitting one-half of its peak...
RHEF
Raman holographic edge filter
scattered light filter
A specific type of filter designed to reduce the amount of light scattered by reflections from the edges of optical components or mounts, or from irregularities on the optical surfaces.
wedge filter
An optical filter so constructed that the density increases progressively from one end to the other, or angularly around a circular disc.
Photonics Dictionary
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