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8 terms
Photonics Dictionary: Z
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zero-order reflection grating
A grating that specularly reflects the specified long radiation wavelengths and diffracts the shorter wavelengths off in known directions, eliminating the interference of randomly scattered radiation.
zero-order transmission grating
A polyethylene grating that transmits the long wavelengths and diffracts shorter wavelengths in controlled directions.
Zeeman effect
The splitting of energy levels of an atom, ion or molecule because of a magnetic field.
Zener diode
A type of semiconductor diode used in voltage-limiting circuits; when voltage reaches a certain value, the device becomes a conductor.
zirconium arc
A small bulb containing a conducting gas, an arc being formed between a metal ring and a tiny zirconium electrode near the center of the ring. The heated zirconium emits light, and constitutes a...
zirconium fluoride
An infrared transmitting material used in the production of fluoride glasses for optical fibers.
ZISC
zero-instruction-set computing
zonal aberration
Spherical or chromatic aberration in a lens having a wide aperture. It is present because the refracting power varies for different zones concentric at the axis. This is the residual when the lens...
Photonics Dictionary
Z
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