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10 terms
Photonics Dictionary: D
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dielectric x
D x
dielectric
Exhibiting the characteristic of materials that are electrical insulators or in which an electric field can be sustained with a minimum dispersion of power. They exhibit nonlinear properties, such as...
dielectric coated grating
A shallow, fine-pitch diffraction grating having a precise dielectric overcoating that experimentally has absorbed wavelength-specific incident light that is polarized in the P-plane.
dielectric coating
A high-reflectance coating consisting of alternating layers of quarter-wave film of a higher refractive index and lower refractive index than the substrate. Such coatings can be made very specific to...
dielectric constant
A number that indicates the magnitude of the shift in a solid of positive and negative charges in opposite directions when a voltage is applied across the solid.
dielectric crystal
A crystal that is characterized by its relatively poor electrical conductance.
dielectric cylindrical waveguide
A waveguide made up of a dielectric material, such as plastic or mica, in a cylindrical form, through which the waves travel.
dielectric filter
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interference filter
A filter that controls the spectral composition of transmitted energy partially by the effects of interference. Frequently, these filters are made up of thin layers of metals and dielectrics,...
dielectric lens
A lens made up of a dielectric material that is capable of influencing radio waves much in the same way an optical lens influences light.
dichroic mirror
A dichroic mirror, also known as a dichroic beamsplitter or interference filter beamsplitter, is an optical device that selectively reflects or transmits light based on its wavelength. Dichroic...
dipole polarization
Electric polarization characterized by homogeneous polar dielectrics and ascribed to the position of the permanent molecular dipoles.
Photonics Dictionary
D
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