quarter-wave plate


Also found in: Acronyms.

quarter-wave plate

[′kwȯrd·ər ‚wāv ¦plāt]
(optics)
A thin sheet of mica or other doubly refracting crystal material of such thickness as to introduce a phase difference of one quarter-cycle between the ordinary and the extraordinary components of light passing through; such a plate converts circularly polarized light into plane-polarized light.
References in periodicals archive ?
Averitt, "Comparison of birefringent electric split-ring resonator and meanderline structures as quarter-wave plates at terahertz frequencies," Opt.
Caption: FIGURE 6: Schema of experimental setup for verifying the POV nature: spatial filter and collimator; TLC-SLM: transmission liquid crystal spatial light modulator; P1: polarizer; QWP1: quarter-wave plate 1; P2: analyzer; QWP2: quarter-wave plate 2; L1: Fourier lens 1; AP; triangular aperture; L2, Fourier lens 2 with [f.sub.1] = 80 [mm] and CCD camera.
Caption: FIGURE 7: Schema of experimental setup for finding the POV diffraction intensity pattern after the Fourier plane: spatial filter and collimator; TLC-SLM: transmission liquid crystal spatial light modulator; P1: polarizer; QWP1: quarter-wave plate 1; P2: analyzer; QWP2: quarter-wave plate 2; L: Fourier lens; FP: Fourier plane; PL1: plane 1; PL2: plane 2; PL3: plane 3; [z.sub.r], Rayleigh range; and f = 380 [mm].
Manmade quarter-wave plates perform this essential function in CD and DVD players and in circular polarizing filters for cameras.
The optical system for the measurement of retardation, which is similar to the one reported in a patent [10], is composed of a He-Ne laser light source, polarizing filters, quarter-wave plates, a rotating polarizing filter, a beam splitter, a beam expander, and photo detectors.
Aguili, "Transmission control of electromagnetic waves by using quarter-wave plate and half-wave plate all-dielectric metasurfaces based on elliptic dielectric resonators," International Journal on Antennas and Propagation, vol.
Apart from the usually used pulse area, that is, field strength, the laser phase is promising as an alternate control knob to coherently manipulate the biexciton state, which can be facilely implemented by changing the light polarization via a quarter-wave plate.
First, remove the quarter-wave plate. Lower the arms to the "straight through" position.
For a perfect quarter-wave plate these are related to [delta] and [psi] by the eq (2)
If the compensator is not a perfect quarter-wave plate, the relationships are
If the compensator is not a perfect quarter-wave plate, then differences in [a.sub.p] and [a.sub.s] are to be expected.