optical diffraction
31Optical theorem — In physics, the optical theorem is a general law of wave scattering theory, which relates the forward scattering amplitude to the total cross section of the scatterer. It is usually written in the form where f(0) is the scattering amplitude with… …
32Optical unit — The Optical Unit is a dimensionless units of length used in optical microscopy. Because every diffraction limited system have their resolution proportional to wavelength / NA, it is convenient for comparison to use this unit. There are actually 2 …
33diffraction grating — Grating Grat ing, n. [See 2d Grate.] 1. A partition, covering, or frame of parallel or cross bars; a latticework resembling a window grate; as, the grating of a prison or convent. [1913 Webster] 2. (Optics) A system of close equidistant parallel… …
34Optical correlator — An optical correlator is a device for comparing two signals by utilising the Fourier transforming properties of a lens.[1] It is commonly used in optics for target tracking and identification. Contents 1 Introduction 2 Implementation …
35optical device — noun a device for producing or controlling light • Hypernyms: ↑device • Hyponyms: ↑autofocus, ↑biprism, ↑camera lucida, ↑coelostat, ↑collimator, ↑diffraction grating, ↑ …
36optical phenomenon — noun a physical phenomenon related to or involving light • Hypernyms: ↑physical phenomenon • Hyponyms: ↑aberration, ↑distortion, ↑optical aberration, ↑absorption band, ↑diffraction, ↑ …
37diffraction grating — diffrac′tion grat ing n. phs a reflective surface etched with fine lines that is used to produce optical spectra by diffraction • Etymology: 1865–70 …
38diffraction — noun when light passes sharp edges or goes through narrow slits the rays are deflected and produce fringes of light and dark bands (Freq. 1) • Derivationally related forms: ↑diffract • Hypernyms: ↑optical phenomenon • Hyponyms: ↑X ray diffraction …
39diffraction grating — noun optical device consisting of a surface with many parallel grooves in it; disperses a beam of light (or other electromagnetic radiation) into its wavelengths to produce its spectrum • Syn: ↑grating • Hypernyms: ↑optical device • Hyponyms:… …
40diffraction grating — noun a surface having a large number of closely spaced lines or slits; used to produce optical spectra by mutual interference …
