dictionary help| OTF --> optical transfer function | medical dictionary |
<microscopy> The relationship between the image produced by an optical instrument and the amplitude and phase of a periodic specimen, measured at various spatial frequencies.
The optical transfer function curve, which shows how well contrast is maintained for finer specimen details, is a complex function, of which the real term gives the ratio of amplitudes, and the imaginary term the phase relationships.
When the brightness of the periodic specimen varies as a sine wave, the modulus or absolute value of the optical transfer function becomes the modulation transfer function, when the brightness varies as a square wave, the modulation transfer function is known as a contrast transfer function.
Acronym: OTF
(26 Mar 1998)
optical time-domain feflectometer, optical time-domain reflectometry < Prev | Next > optical tubelength, optic ataxia, optic atrophy
Bookmark with:      | word visualiser | Go and visit our forums  |
