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7 terms
Photonics Dictionary: D
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refraction x
D x
double refraction
The separation of unpolarized light into two plane-polarized elements by a doubly refracting crystal. When a crystal, such as calcite, is placed between the eye and a pinhole in a card, two bright...
deeply depressed cladding fiber
An optical fiber, usually a single-mode fiber, that has an outer cladding with nearly the same index of refraction as the core and an inner cladding with a very low index of refraction.
diacaustic
A caustic formed by refraction.
dioptric system
An optical system that uses refraction to form an image.
dioptrics
The branch of optics that deals with the study of the refraction of light, particularly by the transmitting medium of the eye, and by lenses.
dispersion formula
All formulas that present the index of refraction as a function of a wavelength of electromagnetic radiation. Also called dispersion equation, Cauchy formula, Hartmann formula.
dispersive power
A measure of the dispersive properties of a glass. The relative dispersion is defined as: where C, D, and F refer to the material's index of refraction at the three chief Fraunhofer lines in the...
Photonics Dictionary
D
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