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Teledyne DALSA - Line Scan Leader 5/24 LB
spectrum Dictionary Terms

plane grating
A transmission or reflecting grating with a flat or plane surface requiring a lens or concave mirror to focus the spectrum.
deep ultraviolet
Deep ultraviolet (DUV or deep-UV) refers to a specific range of ultraviolet light with shorter wavelengths than those in the...
contrast improvement
One area of image enhancement, accomplished by spatial filtering schemes, that usually involves attenuation of phase changes...
first-order spectrum
The separate spectral lines formed by a diffraction grating that are characterized by one wavelength difference in path...
discrete spectrum
A spectrum of component wavelengths whose values are separate from each other.
metal vapor laser
Devices in which the lasing medium is a vapor of metal atoms or ions, sometimes mixed with another gas. Metal vapor lasers...
optical glass
Optical glass refers to a type of glass specifically engineered and manufactured for use in optical components and systems,...
spectrum locus
On a chromaticity diagram, the line on which fall the chromaticities of the pure spectrum colors.
ultraviolet microscopy
The study and photographing of microscope specimens in ultraviolet light; using an optical microscope containing fluorite...
fluorite objective
An objective that uses the mineral fluorite in its construction to reduce the secondary spectrum. It is usually intermediate...
free-electron laser
A free-electron laser (FEL) is a type of laser that generates coherent, high-intensity electromagnetic radiation by using a...
redshift
The displacement of spectrum lines, as determined by the increasing distance between, and the relative velocity of, the...
Kramers-Kronig relation
Analysis of the reflection spectrum that allows the determination of the experimental dielectric function.
ruby laser
The optically pumped, solid-state laser that uses sapphire as the host lattice and chromium as the active ion. The emission...
photoelectric colorimetry
The measurement and analysis of color using a photoelectric instrument having three filters with broad spectrum bands.
black light
Radiation from the invisible (usually ultraviolet) region of the spectrum.
dispersion
Dispersion refers to the phenomenon where different wavelengths (colors) of light travel at different speeds when passing...
luminescence
Luminescence is the emission of light that occurs without the involved substance undergoing a significant increase in...
vibrational transition
A vibrational transition refers to a change in the vibrational energy of a molecule. Molecules consist of atoms that are...
equal-energy source
A light source that produces an equal-energy spectrum.
Fourier transform spectrometer
An instrument using a Michelson interferometer, a beamsplitter, two plane mirrors and a detector to give Fourier analysis of...
primary spectrum
The first-order spectrum formed by a diffraction grating.
etaloning
Etaloning is an optical phenomenon that occurs in imaging systems, particularly in devices such as spectrometers,...
long-wave infrared
Long-wave infrared (LWIR) refers to a specific range of the infrared spectrum. Infrared radiation is divided into three main...
diffraction spectrum
In spectroscopy, the parallel bands that vary in lightness and darkness or color, and that are formed when light is...
high harmonic generation
High harmonic generation (HHG) refers to a nonlinear optical process in which intense laser light interacts with a gaseous...
long-pass filter
A long-pass filter is an optical filter that allows longer wavelengths of light to pass through while blocking or...
filter spectrophotometer
A spectrophotometer that makes use of filters to isolate narrow bands of the spectrum.
ultraviolet B
The region of the electromagnetic spectrum from 280 to 320 nm.
daylight lamp
An incandescent or fluorescent lamp whose emittance spectrum resembles that of daylight.
ultraviolet
That invisible region of the spectrum just beyond the violet end of the visible region. Wavelengths range from 1 to 400 nm.
actinic focus
That point in the electromagnetic spectrum at which an optical system focuses the most chemically effective rays.
wave
1. An undulation or vibration; a form of movement by which all radiant energy of the electromagnetic spectrum is estimated...
Ti:sapphire laser
A Ti:sapphire laser is a type of solid-state laser that utilizes a titanium-doped sapphire crystal as the gain medium. The...
near-infrared spectroscopy
Near-infrared spectroscopy (NIRS) is a non-invasive analytical technique that uses the near-infrared region of the...
emission spectrum
An emission spectrum is a graphical representation or a characteristic pattern of the wavelengths or frequencies of light...
cadmium lines
The three lines in the spectrum of cadmium that have the purest radiations and that were first used by Michelson to...
echelette grating
A diffraction grating with lines and grooves formed so as to concentrate the radiation of a particular wavelength into one...
hybrid electromagnetic wave
A wave in the electromagnetic spectrum that has both electrical and magnetic field vectors in the direction of propagation.
frequency comb
A frequency comb is a precise and regular series of equally spaced spectral lines, or frequencies, that are generated with...
camera
A light-tight box that receives light from an object or scene and focuses it to form an image on a light-sensitive material...
infrared lens
An infrared lens is an optical component specifically designed and optimized for transmitting, focusing, or manipulating...
terahertz spectrometer
A terahertz spectrometer is a scientific instrument used to measure and analyze the properties of materials in the terahertz...
angular spectrum approach
The angular spectrum approach is a mathematical and computational technique used in the field of optics to analyze and...
Pellin-Broca prism
A form of dispersing prism, often used in monochromators, that consists of a common right-angle prism with a 30°...
quantum cascade laser
A quantum cascade laser (QCL) is a type of semiconductor laser that operates based on the principles of quantum mechanics....
photochromic
Photochromic refers to a property exhibited by certain materials, typically organic compounds or dyes, which undergo...
circular dichroism
Circular dichroism (CD) is a spectroscopic technique used to study the structural characteristics of chiral (asymmetric)...
silicon photodiode
A silicon photodiode is a semiconductor device that converts light into an electrical current. It is a type of photodetector...
Ultraviolet-C
Ultraviolet-C (UV-C) refers to a specific range of ultraviolet radiation with shorter wavelengths than those of visible...
dark-line spectrum
A spectrum having some lines that are darker than others or that contrast against a light, continuous-spectrum background.
quartz spectrograph
A spectrograph used to detect radiation in the range of the ultraviolet in the electromagnetic spectrum. It is made up of...
cyanometer
An instrument designed to measure the proportion of light emitted by a source in the blue region of the spectrum.
attosecond photonics sources
Attosecond photonics sources refer to devices or systems that generate extremely short pulses of light on the order of...
Doppler-spread imaging
An imaging process, similar to specific Doppler mapping radar techniques, that utilizes a laser, an optical imaging system,...
frequency domain
The frequency domain is a concept used in signal processing and analysis to represent signals and data in terms of their...
depth of convergence
A critical image parameter in applications where object position may change dynamically relative to the imager; this is a...
Wiener spectrum
 x-ray spectrometer
An instrument designed to produce an x-ray spectrum of a material as an aid in identifying it. This technique is...
terahertz radiation
Electromagnetic radiation with frequencies between 300 GHz and 10 THz, and existing between regions of the electromagnetic...
ultraviolet fiber optics
Ultraviolet (UV) fiber optics refers to optical fibers that are designed and optimized for the transmission of ultraviolet...
Talbot's bands
The series of interference bands that appear in the spectrum when a specified glass plate is inserted into a spectroscope,...
bright-line spectrum
An emission spectrum consisting of bright bands against a dark background.
electronic band spectrum
The bands of spectral lines representing the electronic transition in a molecule.
detector-Dewar assembly
A detector-Dewar assembly typically refers to a combination of a detector and a Dewar flask used in scientific instruments,...
germanium crystal
Germanium crystal refers to a crystalline form of the element germanium (Ge), which is a metalloid and semiconductor...
germicidal UV
Germicidal ultraviolet (GUV) refers to a specific range of UV radiation that has disinfectant properties capable of killing...
absorption peak
An absorption peak refers to a sharp increase or spike in the absorption of electromagnetic radiation at a particular...
prism
A prism is a geometric optical element with flat, polished surfaces that refract light. It is typically a solid, transparent...
tip-enhanced Raman scattering
Tip-enhanced Raman scattering (TERS) is a powerful technique that combines Raman spectroscopy with the enhanced spatial...
Nernst glower
A Nernst glower, also known simply as a Nernst lamp or Nernst filament, is a type of incandescent lamp or radiant heater...
quasi-optical
Having properties resembling those of light- waves; e.g., the propagation of waves in the television spectrum.
spectrum light source
A lamp that yields a nonluminous flame; used in the spectroscopic analysis of radiation emitted by a substance placed in the...
Zeeman broadening
Broadening of a spectrum that results from the influence of a magnetic field.
spectrometer mask
A high-contrast transparency of the gas sought, or an array of exit slits that correlates with some features of the...
far-infrared
That part of the infrared spectrum from about 30 to 1000 µm.
spectroscopy
Spectroscopy is a technique used in the study of interactions between matter and electromagnetic radiation. It involves...
absorption spectrum
Fraction absorption over a specified range of wavelengths.
photographic photometry
A form of photometric measurement, often used with light sources that are transparent or fluctuating, in which a...
solar radiation
Radiation from the sun that is made up of a very wide range of wavelengths, from the long infrared to the short ultraviolet...
flash photolysis
A spectroscopic technique used in the detection of free radicals by virtue of their electronic spectra. In this method, an...
crystal spectrograph
A system that applies a crystal as a diffracting agent to photograph the spectrum.
Lyman continuum
A spectrum that is continuous in the UV region with borders ranging from the visible to 300 A and lower.
infrared detector
An infrared detector is a device that is used to detect and measure infrared radiation, which lies beyond the visible...
optical cements and adhesive
Optical cements and adhesives are specialized materials used in the assembly and bonding of optical components in optical...
light filter
A homogeneous optical medium or coating that transmits only in particular regions of the spectrum. It is used to change or...
vacuum ultraviolet radiation
Radiation whose spectrum runs between 100 and 300 nm. Any work with these wavelengths requires evacuated equipment.
band spectrum
A spectrum that originates from molecules and that is composed of bands which, in turn, consist of many closely spaced...
short wavelength infrared
Short wavelength infrared (SWIR) refers to the portion of the infrared spectrum that encompasses wavelengths roughly between...
atomic emission spectrometry
Spectrometric analysis of the distinct and characteristic spectra of atoms of elements. The atoms are energized to emit...
optical air mass
A measure of the optical path length for light traveling from the sun or other celestial source through Earth's atmosphere...
direct-vision pocket spectroscope
A small handheld instrument consisting of a slit and collimator that feeds light into a small direct-vision dispersing...
video
Referring to the bandwidth and spectrum location of the signal produced by television or radar scanning.
photobiomodulation
A light therapy that utilizes nonionizing light sources, including lasers, LEDs, and broadband light, in the visible and...
sapphire crystal
Sapphire crystal refers to a transparent, single-crystal form of aluminum oxide (Al2O3) known as corundum. It is one of the...
rainbow hologram
Essentially, a hologram of a hologram, in which the first-generation hologram is masked with a narrow slit. During image...
photosynthetically active radiation
Photosynthetically active radiation (PAR) is the 400- to 700-nm region (visible light) of the electromagnetic spectrum that...
optical coherence tomography imaging system
Optical coherence tomography (OCT) is an imaging technique used in medical diagnostics and biomedical research to obtain...
line source
In the spectral sense, an optical source that emits one or more spectrally narrow lines as opposed to a continuous spectrum....
near-infrared spectrometer
A near-infrared (NIR) spectrometer is an analytical instrument used to measure the absorption, transmission, or reflection...
far-ultraviolet radiation
That radiation characterized by wavelengths ranging from 0.2 to 0.3 µm in the electromagnetic spectrum.
Er:YAG laser
An Er:YAG laser is a type of solid-state laser that uses a crystal made of erbium-doped yttrium aluminum garnet...
ultraviolet photoemission spectroscopy
A technique for measuring the energy spectrum of electrons emitted during the absorption of ultraviolet radiation. This...
radio astronomy
The detection and analysis of naturally formed extraterrestrial electromagnetic radiation within the radio frequency range...
blackbody source
A blackbody source, often simply referred to as a blackbody, is a theoretical or practical physical object that absorbs all...
optical clock
An optical clock is a highly precise and advanced timekeeping device that relies on the oscillations of electromagnetic...
solar simulation
The simulation of solar radiation in the infrared and ultraviolet spectrum for the analysis of extraterrestrial sunlight and...
spectrum analyzer
A scanning device used to cyclically tune through a given frequency range to determine the amplitude-frequency distribution...
infrared optic
Infrared optics refer to optical components and systems designed to manipulate and control infrared (IR) light, which lies...
helium-neon laser
A helium-neon (HeNe) laser is a type of gas laser that emits visible red light at a wavelength of 632.8 nm. It operates...
broadband dielectric mirrors
Broadband dielectric mirrors, also known as broadband mirrors, are optical coatings designed to efficiently reflect or...
Fraunhofer lines
The dark absorption lines observed in the spectrum of the photosphere of the sun. There are thousands of these lines, the...
white-light continuum
An extremely wide emission spectrum generated by the nonlinear effects created when a high peak power from a short-pulse...
impurity level
In the context of optical materials, the term "impurity level" refers to the presence of foreign atoms or molecules within...
differential spectrophotometry
The measurement of the spectrum bands formed by a spectroscopic sample, based on the differences between the sample and the...
GaAlAs laser
A GaAlAs laser is a type of semiconductor laser diode that emits light in the near-infrared region of the electromagnetic...
spectrophotometer
A spectrophotometer is a scientific instrument used to measure the intensity of light at various wavelengths in the...
spectroscope
In a general sense, any one of a class of instruments used to disperse radiation, visible or invisible, into its component...
cyanometry
The analysis of light in the blue region of the visible spectrum.
absorption band
A group of frequencies or wavelengths on the electromagnetic spectrum which exhibits resonance or energy contributions near...
Vegard-Kaplan bands
The bands found by Vegard in the spectrum of the aurora borealis and by Kaplan in the nitrogen afterglow. They are formed by...
solar simulator
A solar simulator is a device used to replicate the spectrum and intensity of sunlight in a controlled environment for...
Raman spectroscopy
Raman spectroscopy is a technique used in analytical chemistry and physics to study vibrational, rotational, and other...
nuclear quadrupole resonance spectroscopy
A chemical detection technique used to measure molecules that have a magnetic dipole moment. The analysis is directed to...
extreme ultraviolet
Extreme ultraviolet (EUV) refers to a specific range of electromagnetic radiation in the ultraviolet part of the spectrum....
far-infrared maser
A gas maser that is capable of producing radiation in the far-infrared region of the spectrum.
maser
An acronym for microwave amplification by stimulated emission of radiation. Predecessor to the laser, the maser or...
phototherapy
Phototherapy is a medical treatment that involves the use of light to treat various conditions, particularly those related...
microspectrograph
A microspectroscope equipped with a sensing and recording device, such as a camera, to measure the spectrum formed by...
attenuated total reflectance spectroscopy
Attenuated total reflectance (ATR) spectroscopy is a technique used in analytical chemistry to obtain IR spectra of samples....
high dynamic range
High dynamic range (HDR) refers to a technology that allows for a broader and more dynamic range of luminosity in visual...
spectrum
See optical spectrum; visible spectrum.
equal-energy spectrum
Spectrum characterized by equal energy (power, flux) per unit wavelength interval.
photoluminescence mapping
A technique used for noncontact inspection of semiconductor wafers. The material is illuminated by an excitation source that...
thermal-infrared camera
A thermal-infrared camera, often referred to simply as a thermal camera, is a type of imaging device that detects infrared...
infrared camera
An infrared camera, also known as a thermal imaging camera or IR camera, is a device that captures and visualizes the...
microwave
An electromagnetic wave lying within the region of the frequency spectrum that is between about 1000 MHz (1 GHz) and 100,000...
ultraviolet reflectance
Ultraviolet reflectance refers to the ability of a material or surface to reflect UV light. Ultraviolet light is...
sapphire window
A sapphire window refers to a transparent optical component made from sapphire crystal. Sapphire is a single-crystal form of...
GaN distributed feedback lasers
GaN (gallium nitride) distributed feedback (DFB) lasers refer to a specific type of semiconductor laser based on Gallium...
femtosecond laser
A femtosecond laser is a type of laser that emits ultrashort pulses of light with durations on the order of femtoseconds,...
power flow equation
Optical fiber channel characterization scheme based on three assumptions; the discrete mode spectrum can be replaced by a...
excimer laser
An excimer laser is a type of ultraviolet laser that emits short pulses of light in the ultraviolet spectrum. The term...
mid-wave infrared
MWIR stands for mid-wave infrared, referring to a specific range of wavelengths within the infrared spectrum. Infrared...
sun-tracking concentrator
Controlled beam technology that introduces beams of sunlight through holes in a roof that are relayed throughout the...
output spectrum display
The direct computation of the Fourier transform of the space variant system output of an optical processor with a single...
x-ray crystal spectrometer
An instrument that measures the wavelengths of an x-ray spectrum by the diffraction of x-rays from a crystal with a given...
concave grating
A reflecting grating ruled on a concave spherical surface that not only disperses the light but focuses the spectrum. The...
electromagnetic radiation
Radiation emitted from vibrating charged particles. A combination of oscillating electrical and magnetic fields that...
sapphire optical fiber
Sapphire optical fiber is a type of optical fiber made from single-crystal sapphire, which is a form of aluminum oxide...
photochromism
The reversible change in the absorption spectrum of certain compounds upon irradiation with a given wavelength of light.
holographic grating
A holographic grating is a type of diffraction grating that is produced using holographic recording techniques. It consists...
quantum dot light-emitting diode
Quantum dot light-emitting diode (QLED) is a display technology that utilizes quantum dots, which are semiconductor...
cesium-antimonide photocathode
A photocathode that exhibits maximum sensitivity in the blue and ultraviolet regions of the spectrum. The sensitivity is...
panchromatic sensitivity
Color sensitivity extended to cover the entire visible spectrum out to the red.
hyperspectral imaging camera
A hyperspectral imaging camera is a sophisticated imaging device capable of capturing and processing data across a wide...
glass
A noncrystalline, inorganic mixture of various metallic oxides fused by heating with glassifiers such as silica, or boric or...
Stokes line
A line of the Raman spectrum that fulfills Stokes' law because it possesses a wavelength that is greater than the radiation...
supercontinuum
Supercontinuum refers to a broad spectrum of light that spans a wide range of wavelengths, typically from the visible to the...
diffraction grating spectrograph
A spectrograph that uses a diffraction grating as its dispersive element in place of a prism, and yields greater resolving...
colorimetric purity
Ratio, to the luminance of a test color, of the luminance of the spectrum color that matches the test color when mixed with...
infrared
Infrared (IR) refers to the region of the electromagnetic spectrum with wavelengths longer than those of visible light, but...
Whittaker-Shannon theorem
The theorem stating that, when the sampling period in a recorded sample hologram is matched to the object spectrum, the...
dispersion-flattened single-mode fiber
A type of glass optical fiber that provides low pulse dispersion over a broad portion of the light spectrum and as a result...
scanning spectroradiometer
A spectroradiometer having a means to scan different regions of the light spectrum, providing simultaneous representations...
hyperspectral resolution
Hyperspectral resolution refers to the level of detail or granularity in the spectral information captured by a...
metal arc
The electrical arc formed between metal rods that emits the spectrum of the metal itself. Commonly used in the chemical...
window
1. A piece of glass with plane parallel surfaces used to admit light into an optical system and to exclude dirt and...
power spectrum equalization
A filtering method that restores a blurred image by setting its power spectrum equal to that of the original image.
near-infrared camera
A near-infrared (NIR) camera is an imaging device designed to capture images in the near-infrared region of the...
Stark broadening
Spectrum broadening that results from the influence of an electric field.
indium gallium arsenide camera
An InGaAs (indium gallium arsenide) camera is a type of imaging device that utilizes InGaAs sensors to capture images in the...
colorimetric photometer
A photometer that uses a set of color filters to measure the intensity of light in various regions of the spectrum.
self-phase modulation
Self-phase modulation (SPM) is a nonlinear optical phenomenon that occurs when an intense laser beam passes through a...
InGaAs photodiode
An InGaAs photodiode refers to a photodetector device that is constructed using a semiconductor material composed of a...
diffuse reflectance spectroscopy
Diffuse reflectance spectroscopy (DRS) is a nondestructive analytical technique used to investigate the optical properties...
phase distrortion
Phase distortion refers to a change in the phase relationships between different frequency components of a signal. In the...
cadmium red line
The narrowest line of the cadmium spectrum; the red line has the purest radiation.
Rayleigh line
That element of a spectrum line in scattered radiation having a frequency equal to that of the corresponding incident...
half bandwidth
The term half bandwidth (HBW) generally refers to the width of a spectral band or frequency range at half of its maximum...
solar black
A material, such as gold black and carbon black, that is used as a solar absorber because of its high absorptance and low...
false color process
Entirely analogous to color photography, but inclusive of light bands that do not appear in the visible spectrum.
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...
x-ray detection
The collection and detection of x-rays by virtue of their ionizing properties. The ionization may be perceived directly by a...
aureole
The indistinct, less luminous portion lying immediately outside an electric arc whose spectrum often differs from that of...
spectrograph
An optical instrument for forming the spectrum of a light source and recording it on a film. The dispersing medium may be a...
nonperiodic radiation
Irregular waves; e.g., light waves, having little coherence and a broad spectrum of frequencies.
synchrotron
A synchrotron is a type of particle accelerator that uses magnetic fields to steer charged particles, typically electrons or...
Nd:YAG laser
Nd:YAG laser refers to a solid-state laser that utilizes neodymium-doped yttrium aluminum garnet (Nd:Y3Al5O12) as the gain...
line spectrum
A spectrum formed by radiation whose energy values of the property being measured cluster about at least one discrete value,...
reflective spectroscopy
Reflectance spectroscopy is a technique used to analyze the reflective properties of materials across various wavelengths of...
neutral density coating
A coating applied to a neutral density glass that is designed to reduce the amount of light evenly across the transmitted...
electron probe microanalysis
An analytical technique used to determine the nature of extremely small samples by forming the x-ray spectrum of the samples...
electromagnetic spectrum
The total range of wavelengths, extending from the shortest to the longest wavelength or conversely, that can be generated...
spectral signature
A spectral signature, in the context of remote sensing and spectroscopy, refers to the unique pattern or characteristic...
Hertzian waves
The radio waves of the electromagnetic spectrum that have frequencies of up to 10,000 megacycles per second.
indium phosphide
Indium phosphide (InP) is a compound semiconductor material composed of indium (In) and phosphorus (P). It belongs to the...
Doppler-Fizeau principle
The principle stating that the displacement of spectrum lines is determined by the distance between, and relative velocity...
mass spectrum
A spectrum that displays the distribution in mass or in mass-to-charge ratio of ionized atoms, molecules or molecular parts....
optical power spectrum
Also known as the Wiener spectrum or the noise power spectrum, the optical power spectrum is a fundamental quantity in...
spectral flow cytometry
Spectral flow cytometry is an advanced flow cytometry technique that expands the capabilities of traditional flow cytometry...
ultraphotic rays
The rays (such as ultraviolet rays) lying past the visible region of the spectrum.
magnetic rotation spectrum
The absorption spectrum of an element influenced by a magnetic field in the same direction as the transmitted light, which...
absorption line
The wavelength or frequency corresponding to an absorption resonance with a given molecular or atomic species. The line...
ultrafast pulsed laser
An ultrafast pulsed laser is a type of laser that emits extremely short pulses of light with durations typically on the...
picosecond continuum
A broadband, visible picosecond probe pulse capable of measuring an entire absorption spectrum in one shot.
secondary spectrum
multiband camera
A group of four cameras loaded with different combinations of filters and film (one is usually an infrared color film) to...
interference spectrum
The spectrum produced by the interference of light provided that the source used to create the interference has a broad...
heterochromatic light
Radiation consisting of more than a single wavelength in the visible region of the spectrum.
spectral width
A measure of the wavelength extent of a spectrum.
CMOS camera
A CMOS camera refers to an imaging device that employs a complementary metal-oxide-semiconductor (CMOS) image sensor to...
synchrotron radiation
Radiation emitted by electrons when they travel in circular orbits at speeds close to that of light. Synchrotron radiation...
GaN-based LEDs
Gallium nitride-based light-emitting diodes (GaN-based LEDs) are semiconductor devices that emit light when an electric...
molecular spectroscopy
Spectrum analysis concerned with the spectra formed by transitions in molecules.
hyperspectral imaging
Hyperspectral imaging is an advanced imaging technique that captures and processes information from across the...
prismatic spectrum
The spectrum formed by a dispersing prism or a dispersing prism system.
resonance spectrum
The fluorescent emission spectrum emitted by certain substances following the irradiation of one of these substances with...
mercury arc
An electric arc that is formed in mercury vapor through which an electric current flows. The intensity of the illumination...
infrared light-emitting diode
An infrared light-emitting diode (IR LED) is a semiconductor device that emits infrared light when an electric current...
radio telescope
An instrument designed to collect naturally formed extraterrestrial electromagnetic radiation within the radio frequency...
blue diode laser
A blue diode laser is a type of semiconductor laser that emits light in the blue wavelength range of the electromagnetic...
spectrum measuring instrument
A traveling microscope or an automatic microdensitometer used to measure the spectrum plate obtained in a spectrograph.
nonspectral color
A color whose hue is not produced by a single wavelength in the visible spectrum, but is instead produced by mixing the...
mass spectrograph
A device that uses electromagnetic fields to separate electrically charged particles according to their masses. As a beam of...
zero-order filtering
The removal of the zero-order component of the Fourier spectrum distribution of an object with a small, opaque absorber or...
optical spectrum
1.) Generally, the electromagnetic spectrum within the wavelength region extending from the vacuum ultraviolet at 40 nm to...
photochromatic compound
A chemical compound that exhibits a reversible change in its absorption spectrum upon irradiation with given wavelengths of...
detector array
A detector array refers to a collection of individual detector elements arranged in a two-dimensional grid or matrix format....
complementary wavelength
Also called complementary dominant wavelength. On a chromaticity diagram, the wavelength on the spectrum locus that lies on...
spectral repeatability
Spectral repeatability refers to the consistency and reproducibility of spectral measurements across multiple trials or...
continuous spectrum
The radiation spectrum of matter found in condensed states, liquid or solid, that is continuous and not a line spectrum. The...
microcomb
A microcomb, short for microresonator frequency comb, is a novel photonic device that generates a precise series of evenly...
mid-infrared camera
A mid-infrared camera is a type of imaging device designed to capture images in the mid-infrared (mid-IR) spectral range,...
surface-enhanced Raman scattering
Surface-enhanced Raman scattering (SERS) is a powerful analytical technique that enhances the Raman scattering signal of...
visible spectrum
That region of the electromagnetic spectrum to which the retina is sensitive and by which the eye sees. It extends from...
Paschen series
An array of lines in the infrared region of the emission spectrum of atomic hydrogen. Their wave numbers are expressed by...
comparator-densitometer
A device used to project a reference spectrum next to a spectrum to be analyzed to provide visual comparison.
excitation purity
On the CIE chromaticity diagram, the distance from the achromatic point to the sample point, divided by the distance from...
explosion spectrum
The light spectrum formed by an explosive reaction or by the electrical explosion of a metallic wire by a strong current.
alexandrite lasers
An alexandrite laser is a solid-state laser that utilizes a synthetic crystal made from the rare earth element alexandrite...
monochromator
A monochromator is an optical instrument used to isolate and select a narrow range of wavelengths from a broader spectrum of...
auroral line
The green line, in the spectrum of the aurora borealis, that has a wavelength of 5577 Å; it is caused by a forbidden...
terahertz
Terahertz (THz) refers to a unit of frequency in the electromagnetic spectrum, denoting waves with frequencies between 0.1...
light fidelity
LiFi, short for light fidelity, is a wireless communication technology that utilizes visible light or infrared light to...
ultraviolet A
The region of the electromagnetic spectrum from 320 to 400 nm.
free-spectral range
The frequency space between consecutive transmission peaks in the transmission spectrum of a Fabry-Perot interferometer or...
far-infrared laser
A laser with output over a wide range of wavelengths spanning the far-infrared region of the spectrum (30 to 1000 µm);...
optical filter
An optical filter is a device that selectively transmits or blocks specific wavelengths, or colors, of light. Optical...
multispectral imaging
Multispectral imaging is a technique that involves capturing and analyzing images at multiple discrete spectral bands within...
optical pyrometer
An instrument for determining the temperature of a hot object by examining the color spectrum of the visible light it gives...
swept-source laser
A swept-source laser, also known as a wavelength-swept laser, is a type of laser that rapidly and continuously changes its...
infrared light source
An infrared light source is a device that emits light in the infrared spectrum, which lies beyond the visible spectrum of...
spectroradiometer
A spectroradiometer is a device used to measure the intensity of light at different wavelengths across the electromagnetic...
comparison spectrum
In analysis, a reference spectrum, having predetermined wavelengths, that is used to determine the wavelengths of another...
arc spectrum
The spectrum of the light produced by vaporizing an element in an electric arc.
annihilation radiation
Gamma ray radiation released when matter and antimatter, such as electron and positron, unite and eliminate each other,...
advanced tactical air reconnaissance system
An aerial reconnaissance system that can transmit, in near real time, image data recorded by IR and visual-spectrum sensors,...
gallium arsenide phosphide
Gallium arsenide phosphide (GaAsP) is a semiconductor alloy composed of gallium (Ga), arsenic (As), and phosphorus (P). It...
mass spectrometer
A device used to measure the masses and relative concentrations of atoms and molecules. It utilizes the Lorentz force...
FTIR spectrometer
FTIR (Fourier transform infrared) spectrometer is a powerful analytical instrument used to obtain an infrared spectrum of...
separation filters
Three filters used in making a color print of a color negative, red, green and blue-violet, respectively. Each filter...
equal-energy white
A stimulus that contains equal energy at each wavelength in the visible region of the spectrum.
hyperchromic shift
Hyperchromic shift refers to an increase in the absorption of light, leading to a higher absorbance, often observed in...
organic dye laser
A laser having a lasing material that is a fluorescing organic dye. Depending on the dye used, it can produce emission in...
liquid gate
An immersion liquid used to treat polarizing filters to eliminate the effects of surface variations and to minimize the...
flame spectrum
The emission spectrum formed by the radiation from a sample that has been evaporated by a nonluminous flame.
nitrogen vacancy
A nitrogen vacancy (NV) refers to a specific type of defect or impurity in a crystal lattice where a nitrogen atom replaces...
Förster resonance energy transfer
Förster resonance energy transfer (FRET) is a mechanism describing the transfer of energy between two closely spaced...
light
Electromagnetic radiation detectable by the eye, ranging in wavelength from about 400 to 750 nm. In photonic applications...
spectrum photography
The photographic recording of visible and ultraviolet spectra on an ordinary photograph.
electron band
A spectrum band that is usually found in the visible or the ultraviolet because of the electron transitions taking place...
thermal dissociation
A technique for detecting free radicals by their electronic spectra. The material to be studied is placed in a...
ultraviolet spectrometer
A spectrophotometer designed for use in the 200- to 380-nm range of the electromagnetic spectrum and equipped with a...
radiation detector
Any of the many devices used to detect the presence of radiation from a specific region of the electromagnetic spectrum.

(275 results found)

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