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A wavelength shifter is a photofluorescent material that absorbs higher frequency photons and emits lower frequency photons. The material absorbs one photon
Wavelength_shifter
Chemical compound
used as a wavelength shifter (also called a "secondary scintillator"), which means that it converts shorter wavelength light to longer wavelength light.
POPOP
Chemical compound
as a wavelength shifter (also called a "primary shifter" or "fluor"), which means that it converts shorter wavelength light to longer wavelength light
2,5-Diphenyloxazole
Change in hue perception
spectral distribution shifts towards blue, if its dominant wavelength is below around 500 nm; or yellow, if its dominant wavelength is above 500 nm. As
Bezold–Brücke_shift
Scattering of photons off charged particles
the photon's energy is reduced, and thus its wavelength is increased. This trade-off between wavelength and energy in response to the collision is the
Compton_scattering
Fiber-optic communications technology
In fiber-optic communications, wavelength-division multiplexing (WDM) is a technology which multiplexes a number of optical carrier signals onto a single
Wavelength-division multiplexing
Wavelength-division_multiplexing
Chemical compound
It glows blue with an emission spectrum peak wavelength at 430 nm, It is useful as a wavelength shifter. 1,2,3,4-Tetraphenylbutadiene ((C6H5)CH=C(C6H5)C(C6H5)=CH(C6H5))
1,1,4,4-Tetraphenylbutadiene
has a peak wavelength of 580 nm, α-CR exhibits a bathochromic shift to 632 nm; the mechanism and function of the additional wavelength shift is not understood
Crustacyanin
Relation between peak wavelengths of black body radiation and temperature
different temperatures will peak at different wavelengths that are inversely proportional to the temperature. The shift of that peak is a direct consequence of
Wien's_displacement_law
Difference between absorption and emission peak maxima
absorption wavelength. For instance, a 50 nm Stokes shift from absorption at 300 nm is larger in terms of energy than a 50 nm Stokes shift from absorption
Stokes_shift
Electromagnetic radiation humans can see
Visible light spans the visible spectrum and is usually defined as having wavelengths in the range of 400–700 nanometers (nm), corresponding to frequencies
Light
Length used in relativistic quantum physics
The Compton wavelength is defined as the wavelength of a photon whose energy is the same as the rest energy of that particle. The wavelength sets the minimum
Compton_wavelength
The magic wavelength (also known as a related quantity, magic frequency) is the wavelength of an optical lattice where the polarizabilities of two atomic
Magic_wavelength
Change in wavelength of light
wavelength, or equivalently, a decrease in the frequency, of electromagnetic radiation (such as light). The opposite change, a decrease in wavelength
Redshift
Topics referred to by the same term
different language Shifting (syntax), a syntactic process Sound shift, also known as sound shifting or sound change Vowel shift Barrel shifter, a digital circuit
Shift
Optical polarization device
quarter-wave plate, etc.) depends on the thickness of the crystal, the wavelength of light, and the variation of the index of refraction. By appropriate
Waveplate
Portion of the electromagnetic spectrum that is visible to the human eye
mixture of multiple wavelengths. Colors containing only one wavelength are also called pure colors or spectral colors. Visible wavelengths pass largely unattenuated
Visible_spectrum
Underground neutrino physics experiment
neutrino detection. SNO+ completed its liquid scintillator fill and wavelength shifter (PPO) loading in 2022 and has been operating in a physics data-taking
SNO+
Rate at which an astronomical object moves away from an observer
the expansion of the universe. It can be measured by observing the wavelength shifts of spectral lines emitted by the object, known as the object's cosmological
Recessional_velocity
Biochemistry method
red shift from approximately 330 nm to 350 nm upon protein unfolding and exposure to water. Quantification of these fluorescence wavelength shifts at various
Nano differential scanning fluorimetry
Nano_differential_scanning_fluorimetry
Material which glows when excited by ionizing radiation
PBD (C 20H 14N 2O), butyl PBD (C 24H 22N 2O), PPO (C 15H 11NO), and wavelength shifter such as POPOP (C 24H 16N 2O). The most widely used solvents are toluene
Scintillator
Full range of electromagnetic radiation frequencies
the full range of electromagnetic radiation, organized by frequency or wavelength. The spectrum is divided into separate bands, with different names for
Electromagnetic_spectrum
Type of distributed Bragg reflector constructed in a short segment of optical fiber
generates a wavelength-specific dielectric mirror. Hence a fiber Bragg grating can be used as an inline optical filter to block certain wavelengths, can be
Fiber_Bragg_grating
Optical biosensing technology
time than traditional processes. The technology relies on the phase shift-wavelength correlation created between interference patterns off two unique surfaces
Bio-layer_interferometry
Change in a molecule's spectral band position to a shorter wavelength
shift. It should not be confused with a bathochromic shift, which is the opposite process – the molecule's spectra are changed to a longer wavelength
Hypsochromic_shift
Frequency change of a wave for observer relative to its source
ADV emits an ultrasonic acoustic burst, and measure the Doppler shift in wavelengths of reflections from particles moving with the flow. The actual flow
Doppler_effect
Topics referred to by the same term
electromagnetic wavelength caused by the motion of a celestial object toward an observer. Blueshift or blue shift may also refer to: Blue Shift (album), a
Blueshift_(disambiguation)
Light-conducting fiber
required to minimize such unwanted effects. Optical fibers doped with a wavelength shifter collect scintillation light in physics experiments. Fiber-optic sights
Optical_fiber
Topics referred to by the same term
White light scanner, for measuring surface height Wavelength shifter, material that absorbs a wavelength and emits another Wisconsin Lutheran Seminary, in
WLS
Elementary particle with negative charge
which modifies the wavelength of the photon by an amount called the Compton shift. The maximum magnitude of this wavelength shift is h/mec, which is known
Electron
American physicist (1892–1962)
wavelength of the electron; it is equal to 2.43×10−12 m. The wavelength shift λ′ − λ lies between zero (for θ = 0°) and twice the Compton wavelength of
Arthur_Compton
Change in a molecule's spectral band position to a longer wavelength
colors, the effect is also commonly called a red shift. Hypsochromic shift is a change to shorter wavelength (higher frequency). It can occur because of a
Bathochromic_shift
Form of electromagnetic radiation
sometimes called infrared light) is electromagnetic radiation (EMR) with wavelengths longer than that of visible light but shorter than microwaves. The infrared
Infrared
Array of antennas creating a steerable beam
phase shifter element Passive – large central amplifier with attenuating phase shifters Each array element incorporates an adjustable phase shifter. These
Phased_array
Perception caused by wavelengths of light
sensitivity range. Animal perception of color originates from different light wavelength or spectral sensitivity in cone cell types, which is then processed by
Color
gratings (FBGs) where if no physical strain is applied, a Bragg's Wavelength shift of 1 pm per 0.1 °C temperature change can be measured. Ghosh, Gorachand
Thermo-optic_coefficient
Perceived hue shift when white light is added to a monochromatic light source
change in wavelength that must be obtained in order for the eye to detect a shift in hue. An expression λ + Δλ defines the required wavelength adjustment
Abney_effect
Topics referred to by the same term
known as p-Bis(o-methylstyryl) benzene and abbreviated Bis-MSB, a wavelength shifting compound used in liquid scintillators Microsoft Surface Book, a portable
MSB
Tendency for sight to shift toward blue colors at low light levels
light in scotopic vision varies with wavelength, though the perception is essentially black-and-white. The Purkinje shift is the relation between the absorption
Purkinje_effect
In a single-mode optical fiber, the zero-dispersion wavelength is the wavelength or wavelengths at which material dispersion and waveguide dispersion
Zero-dispersion_wavelength
Dark matter search experiment
S2CID 119029164. Broerman, B (18 April 2017). "Application of the TPB Wavelength Shifter to the DEAP-3600 Spherical Acrylic Vessel Inner Surface". JINST. 12
DEAP
1967 experimental film by Michael Snow
Wavelength is a 1967 experimental film by Canadian artist Michael Snow. Shot from a fixed camera angle, it depicts a loft space with an extended zoom over
Wavelength_(1967_film)
Sensor that uses optical fiber
sensors can be multiplexed along the length of a fiber by using light wavelength shift for each sensor, or by sensing the time delay as light passes along
Fiber-optic_sensor
Type of laser diode
temperature increases, while the longitudinal modes shift about 0.1 nm to the longer wavelengths. If one or both of these end mirrors are replaced with
Distributed-feedback_laser
Substance dissolving a solute resulting in a solution
and hydrogen-bonding basicity (β). These can be calculated from the wavelength shifts of 3–6 different solvatochromic dyes in the solvent, usually including
Solvent
Common configuration for optical interferometry
interferometer, any subsequent "fringe jump" (differential pathlength shift of one wavelength) would always be detected. The Michelson interferometer configuration
Michelson_interferometer
Lithography using 13.5 nm UV light
integrated circuits, with wavelengths as short as 435 nm (mercury G line). Later, ultraviolet (UV) light was used, at first with a wavelength of 365 nm (mercury
EUV_lithography
Electron-photon scattering cross section
ϕ ) {\displaystyle \cos ^{2}(\phi )} . For low energy photons the wavelength shift becomes negligible ( λ / λ ′ ≈ 1 {\displaystyle \lambda /\lambda '\approx
Klein–Nishina_formula
System of measuring the instability of a protein under varying conditions
emission red shift from approximately 330 nm to 350 nm upon protein unfolding and exposure to water. Quantification of fluorescence wavelength shifts at various
Thermal_shift_assay
Interaction of light with material waves in a medium
liquids and gases, the frequency shifts typically created are of the order of 1–10 GHz resulting in wavelength shifts of ~1–10 pm in the visible light
Brillouin_scattering
Optical phenomenon
thin film interfere with one another, increasing reflection at some wavelengths and decreasing it at others. When white light is incident on a thin film
Thin-film_interference
for the excitation is usually a carbon dioxide laser with output wavelength shifted from 10.6 μm to 16 μm; the photolysis laser may be a XeCl excimer
Molecular laser isotope separation
Molecular_laser_isotope_separation
Neutrino observatory in Japan
8 centimetres (3.1 in) diameter PMTs coupled with 0.6×30×30 cm3 wavelength shifting (WLS) plates to collect incident photons and transport them to their
Hyper-Kamiokande
Relativistic effect due to rotation
setup is rotating. The image illustrates that there is wavelength shift (hence a frequency shift) in such a way that the number of cycles is the same in
Sagnac_effect
Type of sensor
The larger wavelength shifts compared to Brillouin scatter mean that it is easier to separate the scattered Raman light from the un-shifted Rayleigh scattered
Distributed_acoustic_sensing
Visual perception under low-light conditions
rod cells, which are most sensitive to wavelengths of around 498 nm (blue-green) and are insensitive to wavelengths longer than about 640 nm. Under scotopic
Scotopic_vision
Dichroism with circularly polarized light
selected wavelength are alternately radiated into a (chiral) sample. One of the two polarizations is absorbed more than the other one, and this wavelength-dependent
Circular_dichroism
Effect in quantum electrodynamics
{\displaystyle k>\pi /a_{0}} . It is also valid only for wavelengths longer than the Compton wavelength, or equivalently k < m c / ℏ {\displaystyle k<mc/\hbar
Lamb_shift
Inelastic optical scattering phenomenon
has a resonance frequency downshift of ~11 THz (corresponding to a wavelength shift at ~1550 nm of ~90 nm). The stimulated Raman scattering amplification
Raman_amplification
Scientific phenomenon
The relativistic Doppler effect is the change in frequency, wavelength and amplitude of light, caused by the relative motion of the source and the observer
Relativistic_Doppler_effect
Property in optics
wavelength of the radiation are reduced with respect to their vacuum values: the speed of light in a medium is v = c/n, and similarly the wavelength in
Refractive_index
Scattering from arrays of atoms
fronts scattered by lattice planes leads to a strict relation between the wavelength and scattering angle. This law was initially formulated for X-rays, but
Bragg's_law
Institute of Technology Experimental confirmation of neutrinos
detected by photomultiplier tubes. The scintillator used was the wavelength shifter POPOP, which peaks in violet light: γ 511 keV + C 24 H 16 N 2 O
Cowan–Reines neutrino experiment
Cowan–Reines_neutrino_experiment
Branch of biology that studies biological systems at the molecular level
color shift from reddish-brown to bright blue upon binding to protein. In its unstable, cationic state, Coomassie Blue has a background wavelength of 465 nm
Molecular_biology
Thermal electromagnetic radiation
radiation emitted is a continuous spectrum over all possible radiation wavelengths that depends only on the body's temperature. A perfectly-insulated enclosure
Black-body_radiation
Optical microscopy technique
where the extinguished wavelength shifts with the phase differential. When sequentially shifted images are collated, the phase-shift introduced by the object
Differential interference contrast microscopy
Differential_interference_contrast_microscopy
Chemical compound
applied. Fluorescence wavelength is highly sensitive to the polarity of the environment. For example, the emission wavelength shifts from 380 nm in cyclohexane
Prodan_(dye)
Mirror made of dielectric materials
can design an optical coating with specified reflectivity at different wavelengths of light. Dielectric mirrors are also used to produce ultra-high-reflectivity
Dielectric_mirror
1938 experiment confirming relativistic time dilation
magnitude of the wavelength shift for the source moving away from the observer exactly equals the magnitude of the wavelength shift for the source moving
Ives–Stilwell_experiment
Layout for a sampling calorimeter in high energy physics detectors
scintillator materials (crystal or plastic), which is penetrated by a wavelength shifting fiber running perpendicular to the absorber and scintillator tiles
Shashlik_(physics)
Phemomenon of physical optics
propagates, and λ is the wavelength of the beam in free space. The Gouy phase results in an increase in the apparent wavelength near the waist (z ≈ 0).
Gouy_phase_shift
iOS and macOS software feature
feature may help users have a better night's sleep by filtering blue wavelengths from the display, which suppress melatonin biosynthesis. The feature
Night_Shift_(software)
Physical model of propagating energy
a broad spectrum, classified by frequency (inversely proportional to wavelength), ranging from radio waves, microwaves, infrared, visible light, ultraviolet
Electromagnetic_radiation
Physical constants of energy and wavenumber
used to express the limiting value of the highest wavenumber (inverse wavelength) of any photon that can be emitted from a hydrogen atom, or, alternatively
Rydberg_constant
Nontraditional laser theory of Fabry-Perot semiconductor lasers
derivation of this relation formula is presented in. Experimental wavelength shift versus normalized current (J/Jth), and the output power versus current
Nonlinear theory of semiconductor lasers
Nonlinear_theory_of_semiconductor_lasers
Species of spider
selectively reflecting wavelengths around 430 nm (blue-violet) through constructive interference of light. The reflected wavelength shifts with viewing angle
Pamphobeteus_antinous
Failure of a lens to focus all colors on the same point
aberration occurs when different wavelengths of light are focused at different distances from the lens (focus shift). Axial aberration is typical at long
Chromatic_aberration
Device that emits light via optical amplification
according to their wavelength in a vacuum. Most "single wavelength" lasers produce radiation in several modes with slightly different wavelengths. Although temporal
Laser
Property of a color
diagram (such as a chromaticity diagram) or color wheel, or by its dominant wavelength or by that of its complementary color. The other color appearance parameters
Hue
British particle physicist
cosmic rays. The scintillator light was transferred via fluorescent wavelength-shifter bars and light guides to 2000 photomultipliers outside the magnet
Peter_Kalmus_(physicist)
Observatory
scintillator. Scintillation light is captured by optical fibers made of wavelength shifter, both ends of which lead to an avalanche photodiode for readout. The
NOvA
Device to determine relative phase shift
half a wavelength, yielding complete destructive interference. The RB arriving at detector 2 will have undergone a phase shift of (0.5 × wavelength + 2k)
Mach–Zehnder_interferometer
Device which diffracts light via sound waves
+2, ... is the order of diffraction, λ is the wavelength of light in vacuum, and Λ is the wavelength of the sound. Note that m = 0 order travels in the
Acousto-optic_modulator
Spectral density of light emitted by a black body
energy of a body increases and the peak of the emitted spectrum shifts to shorter wavelengths. According to Planck's distribution law, the spectral energy
Planck's_law
Ability to perceive differences in light frequency
Sufficient differences in wavelength cause a difference in the perceived hue; the just-noticeable difference in wavelength varies from about 1 nm in the
Color_vision
Range 3-30 GHz of the electromagnetic spectrum
surface, each fed through a phase shifter, which allows the array's beam to be steered electronically. The short wavelength requires great mechanical rigidity
Super_high_frequency
Synthetic polymer
chemical formula for PVT PVT can be doped with anthracene or other wavelength-shifting dopants to produce a plastic scintillator.[page needed] When subjected
Polyvinyl_toluene
Optical multiplexer component
optical (de)multiplexers in wavelength division multiplexed (WDM) systems. These devices are capable of multiplexing many wavelengths into a single optical
Arrayed_waveguide_grating
Distinctive narrow spectral feature of chemical species
addition, its center may be shifted from its nominal central wavelength. There are several reasons for this broadening and shift. These reasons may be divided
Spectral_line
Lens glass material with reduced refractive index shift with wavelength
meaning the refractive index does not change as strongly with different wavelengths of light. In other words, the light passing through the glass has a smaller
Low-dispersion_glass
Monochrome light beam whose amplitude envelope is a Gaussian function
magnetic field amplitude profiles along a circular Gaussian beam of a given wavelength and polarization are determined by two parameters: the waist w0, which
Gaussian_beam
Researcher, inventor, technology entrepreneur
arising from effects such as stray light, concentration-dependent wavelength shifts and absorption band-width changes — and to compare ANN-based calibration
Vasilis_Gregoriou
Physical effect in general relativity
energy corresponds to a decrease in the wave frequency and increase in the wavelength, known more generally as a redshift. The opposite effect, in which photons
Gravitational_redshift
Scientific method
an increase in quantum yield of fluorescence or emission/excitation wavelength shift. Individual chemical Ca2+ fluorescent indicators are utilized for cytosolic
Calcium_imaging
{\displaystyle \lambda _{0}} is the centre wavelength for N = N t h {\displaystyle {N=N_{th}}} and k is the spectral shift constant (see below). N t h {\displaystyle
Laser_diode_rate_equations
Differential absorption of circularly polarized light in a magnetic field
beam. The PEM is adjusted to cause an alternating plus and minus 1/4 wavelength shift of one of the two orthogonal components of the ordinary beam. This
Magnetic_circular_dichroism
Law of wavelength-specific emission and absorption
In heat transfer, Kirchhoff's law of thermal radiation refers to wavelength-specific radiative emission and absorption by a material body in thermodynamic
Kirchhoff's law of thermal radiation
Kirchhoff's_law_of_thermal_radiation
Description of the average spectral sensitivity of human visual perception of brightness
is brighter, to describe relative sensitivity to light of different wavelengths. It is not an absolute reference to any particular individual, but is
Luminous_efficiency_function
Experimental particle physics project
To make detection of these vacuum ultraviolet photons possible, a wavelength shifting coating of either tetraphenyl butadiene or para-terphenyl was applied
Short-Baseline_Near_Detector
Deviation of electrons from their original trajectories
as the Compton wavelength, but is in fact a proportionality constant for the wavelength shift. The collision causes the photon wavelength to increase by
Electron_scattering
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