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Light Sources Dictionary Terms

laser output
The laser output refers to the generated and emitted light produced by a laser system. This output is characterized by...
comparison lamp
A reference incandescent light source having a luminous intensity that is used in photometry for comparison of other light...
colorimeter
A colorimeter is a device used to measure and quantify the color characteristics of an object or a light source. It provides...
optical parametric amplification
Optical parametric amplification (OPA) is a process in nonlinear optics where a weak signal beam is amplified by a much...
functional near-infrared spectroscopy
Functional near-infrared spectroscopy (fNIRS) is a non-invasive neuroimaging technique that measures changes in hemoglobin...
photon-rich
Photon-rich typically refers to an environment or situation where there is an abundance of photons present. In the context...
erbium-doped fiber laser
An erbium-doped fiber laser (EDFL) is a type of laser that uses an optical fiber doped with erbium ions (Er³?) as the...
photodynamic therapy
A medical technology that uses lasers or other light sources in combination with photosensitizing drugs to treat cancerous...
polarization
Polarization refers to the orientation of oscillations in a transverse wave, such as light waves, radio waves, or other...
light diffusion
Light diffusion refers to the process by which light is scattered or spread out in various directions as it interacts with a...
GaAlAs laser
A GaAlAs laser is a type of semiconductor laser diode that emits light in the near-infrared region of the electromagnetic...
ray tracing
Ray tracing is a rendering technique used in computer graphics to simulate the way light interacts with objects in a scene....
fluorescent whitening agents
Agents used for testing light sources and natural daylight with visual and instrumental assessment using a set of white...
optical testing instrument
An optical testing instrument is a device or system used to evaluate and measure the performance, quality, and...
infrared light source
An infrared light source is a device that emits light in the infrared spectrum, which lies beyond the visible spectrum of...
additive color process
The additive color process refers to the method of creating color by combining different wavelengths of light. This...
addressability (optical)
Optical addressability refers to the capability to control or manipulate individual elements that emit or modulate light...
phototherapy
Phototherapy is a medical treatment that involves the use of light to treat various conditions, particularly those related...
quantum cascade laser
A quantum cascade laser (QCL) is a type of semiconductor laser that operates based on the principles of quantum mechanics....
arc light source
In present usage, especially for spectroscopic identification, an arc between electrodes that serves as a radiation source....
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...
ball lens
A ball lens is a small, spherical optical component typically made of glass or other transparent materials. It is...
supercontinuum
Supercontinuum refers to a broad spectrum of light that spans a wide range of wavelengths, typically from the visible to the...
bench photometer
A device used to compare the luminous intensities of two sources by locating a point between the two light sources where the...
photographic photometry
A form of photometric measurement, often used with light sources that are transparent or fluctuating, in which a...
additivity of luminance
The additivity of luminance refers to a principle in visual perception and color theory where the perceived brightness of a...
image plane holography
A hologram in which the image of an object, or the object itself, is located near the hologram recording plane, for optimum...
ytterbium laser
A ytterbium laser is a type of solid-state laser that employs ytterbium ions (Yb³?) as the dopant in the gain medium....
fiber-coupled LED
A fiber-coupled LED (light-emitting diode) refers to an LED device that is optically coupled to an optical fiber for the...
spectroradiometer
A spectroradiometer is a device used to measure the intensity of light at different wavelengths across the electromagnetic...
GaN-based LEDs
Gallium nitride-based light-emitting diodes (GaN-based LEDs) are semiconductor devices that emit light when an electric...
photonics
The technology of generating and harnessing light and other forms of radiant energy whose quantum unit is the photon. The...
distributed feedback laser
A distributed feedback laser (DFB laser) is a type of semiconductor laser diode designed to emit coherent, narrow-bandwidth...
chip-on-board lights
Chip-on-board (COB) lights refer to a type of LED lighting technology where multiple LED chips are directly mounted onto a...
frequency comb
A frequency comb is a precise and regular series of equally spaced spectral lines, or frequencies, that are generated with...
monochromator
A monochromator is an optical instrument used to isolate and select a narrow range of wavelengths from a broader spectrum of...
reflective
The term reflective is an adjective that describes the ability of a surface or material to reflect light or other forms of...
light-emitting diode
An LED, or light emitting diode, is a semiconductor device that emits light when an electric current passes through it. LEDs...
nanoLED
An LED (light-emitting diode) is a semiconductor device that emits light when an electric current passes through it. LEDs...
photobiomodulation
A light therapy that utilizes nonionizing light sources, including lasers, LEDs, and broadband light, in the visible and...
light fidelity
LiFi, short for light fidelity, is a wireless communication technology that utilizes visible light or infrared light to...
dense wavelength division multiplexing
Dense wavelength division multiplexing (DWDM) is an optical communication technique used to increase the data-carrying...
lumen
A lumen is a unit of measurement used to quantify the amount of luminous flux, which is the perceived power of light. In...
acousto-optic deflector
An acousto-optic deflector (AOD) is a type of device that utilizes the acousto-optic effect to control the direction of...
solar simulator
A solar simulator is a device used to replicate the spectrum and intensity of sunlight in a controlled environment for...
optical filter
An optical filter is a device that selectively transmits or blocks specific wavelengths, or colors, of light. Optical...
holographic grating
A holographic grating is a type of diffraction grating that is produced using holographic recording techniques. It consists...
synchrotron
A synchrotron is a type of particle accelerator that uses magnetic fields to steer charged particles, typically electrons or...
Lloyd's mirror
A mirror employed with a very high incidence angle to form a pair of coherent light sources by reflection, and therefore...
octave
In optics, an octave typically refers to a range of frequencies or wavelengths that spans a factor of 2. In other words,...
photon flux
Photon flux refers to the rate at which photons (particles of light) pass through a unit area per unit time. It is a measure...
nonlinear optical materials
Nonlinear optical materials are substances that exhibit optical properties that are not linearly proportional to the...
optical accumulator
An optical accumulator is a concept or device that collects and stores optical energy or data for subsequent use. This can...
wedge photometer
A photometer that uses a wedge, marked to show its reduction of flux density, to make two light sources equal in intensity...
image intensifier
An image intensifier, also known as an image intensification tube or image intensification device, is a specialized...
absolute white
Absolute white is a term used in color science and imaging to describe a reference white point that represents the...

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