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Alluxa - Optical Coatings LB 8/23
efficiency Dictionary Terms

excited-state absorption
In laser pumping, parasitic absorption that occurs at certain wavelengths, decreasing pump efficiency and gain.
single-molecule FRET
Single-molecule Förster resonance energy transfer (smFRET) is a specialized technique in biophysics and molecular...
chelate laser
A laser having a rare-earth chelate within a plastic host as the lasing material. The chelate laser is easily pumped and has...
blaze height
Blaze height typically refers to a parameter in the context of diffraction gratings, which are optical devices consisting of...
virtual histology
Virtual histology refers to the use of digital technology and computational methods to simulate or recreate histological...
bionics
The application of observed operational processes of sophisticated living organisms to mechanical and electrical systems in...
graded index
Descriptive of an optical fiber having a core refractive index that decreases almost parabolically and radially outward...
relay condenser
A form of lens assembly used in a projection system to maximize efficiency and assure uniform illumination of the object...
transmission
In optics, the conduction of radiant energy through a medium. Often denotes the percentage of energy passing through an...
solid-state laser
A solid-state laser is a type of laser that uses a solid gain medium (as opposed to a liquid or gas) to produce coherent...
custom optic
A custom optic refers to an optical component that is designed, manufactured, and tailored to meet specific requirements or...
diode-pumped solid-state laser
A diode-pumped solid-state laser (DPSSL) is a type of laser system that uses semiconductor diode lasers to pump energy into...
radiant efficiency
The ratio of the radiant flux emitted by a source to the power supplied.
retroreflector
A retroreflector is an optical device or structure that reflects incident light or electromagnetic waves back to their...
luminous efficiency
Ratio of radiant flux weighted according to V(l), the spectral luminous efficiency, to the corresponding radiant flux.
luminosity curve
Plot of spectral luminous efficiency vs. wavelength.
fiber laser
A fiber laser is a type of laser in which the active gain medium is an optical fiber doped with rare-earth ions such as...
laser crystal
A laser crystal, also known as an active medium or gain medium, is a solid-state material used in the construction of...
fluorophore
A fluorophore is a molecule or a portion of a molecule that has the ability to emit light upon excitation by an external...
photonic integrated circuit
A photonic integrated circuit (PIC) is a compact and integrated device that incorporates multiple photonic components and...
piezoelectric transducers and ceramic materials
Piezoelectric transducers are devices that utilize the piezoelectric effect to convert electrical energy into mechanical...
photovoltaic
Photovoltaic (PV) refers to a technology that converts sunlight directly into electricity using semiconductors. The term...
automated optical inspection
Automated optical inspection (AOI) is a technology used in manufacturing processes, particularly in electronics, to...
power efficiency
The ratio of emitted power to input power.
second-harmonic generation
Second-harmonic generation (SHG) is a nonlinear optical process that occurs when two photons with the same frequency combine...
optical glass
Optical glass refers to a type of glass specifically engineered and manufactured for use in optical components and systems,...
differential quantum efficiency
The slope of the curve when output is plotted against input for quantum efficiency in a device.
conversion efficiency
In a pumped laser system, the ratio of output energy to pump energy.
hydrogenated amorphous silicon
A photoreceptor material used in solar cells and in drums for laser printers and high-speed copiers because of its high...
well plate
A well plate, also known as a microplate or microtiter plate, is a flat plate with multiple small wells or depressions...
optical channel monitor
An optical channel monitor (OCM) is a device used in optical communication systems to monitor and analyze the performance of...
source efficiency
The ratio of emitted optical power of a source to the input electrical power.
coupling efficiency
The fraction of available output from a radiant source that is coupled and transmitted by an optical fiber.
flowmeter
A flowmeter is a device used to measure the flow rate or quantity of a fluid passing through a particular point in a system....
alexandrite lasers
An alexandrite laser is a solid-state laser that utilizes a synthetic crystal made from the rare earth element alexandrite...
ultraviolet fiber optics
Ultraviolet (UV) fiber optics refers to optical fibers that are designed and optimized for the transmission of ultraviolet...
sputtering equipment
Sputtering equipment is machinery used in the process of physical vapor deposition (PVD), specifically sputtering....
liquid crystal light valve
A liquid crystal light valve (LCLV), also known as a spatial light modulator (SLM), is an optical device that modulates the...
ultrasonic
Ultrasonic refers to sound waves with frequencies higher than the upper audible limit of human hearing, typically above...
GaN distributed feedback lasers
GaN (gallium nitride) distributed feedback (DFB) lasers refer to a specific type of semiconductor laser based on Gallium...
indium phosphide
Indium phosphide (InP) is a compound semiconductor material composed of indium (In) and phosphorus (P). It belongs to the...
thermophotovoltaic
Thermophotovoltaic (TPV) refers to a technology that converts heat energy into electricity using the principles of...
scientific CMOS camera
A scientific CMOS (complementary metal-oxide-semiconductor) camera is a type of digital camera specifically designed for...
metalens
A metalens, short for "metasurface lens," is a type of optical lens that uses nanostructured materials to manipulate light...
diffraction efficiency
Diffraction efficiency is a measure of how effectively a diffractive optical element (DOE) or diffraction grating directs...
reconstruction diffraction efficiency
Holographic quantity expressed as the ratio of the reconstructed first-order image to that of the incident reconstructing...
GigE
GigE, short for gigabit Ethernet, refers to a standard for high-speed Ethernet communication, capable of transmitting data...
lab-on-a-chip
A lab-on-a-chip (LOC) is a miniaturized device that integrates various laboratory functions and capabilities onto a single,...
GaN-based LEDs
Gallium nitride-based light-emitting diodes (GaN-based LEDs) are semiconductor devices that emit light when an electric...
Peltier cooler
A Peltier cooler, also known as a thermoelectric cooler (TEC) or thermoelectric module, is a solid-state device that uses...
luminous
Pertaining to electromagnetic radiation as perceived by the eye; that is, with the contributions as wavelengths in the...
solar simulator
A solar simulator is a device used to replicate the spectrum and intensity of sunlight in a controlled environment for...
single-photon avalanche diode
A single-photon avalanche diode (SPAD) is a specialized type of photodetector designed to detect extremely weak optical...
scientific complementary metal-oxide semiconductor
Scientific complementary metal-oxide semiconductor (sCMOS) refers to a type of image sensor technology specifically designed...
light throughput efficiency
The fraction of incident light power in an optical modulator that is available to the output beam.
maximum luminous efficiency
The greatest luminosity possible for a specified chromaticity.
holographic grating
A holographic grating is a type of diffraction grating that is produced using holographic recording techniques. It consists...
edge-defined film-fed growth
Process for growth of solar cells that results in rectangular shapes consisting of many interconnected cells in a series or...
whole slide imaging
Whole slide imaging (WSI), also known as virtual slide microscopy or digital pathology, is a technology that involves the...
transmission efficiency
Measure of the amount of light that is transmitted, relative to the amount lost by absorption or reflection.
multijunction device
A photovoltaic device that consists of multiple p-n junctions to produce a greater efficiency when in use than that of...
internet of things
The internet of things (IoT) refers to a network of interconnected physical devices, vehicles, appliances, and other objects...
photographic shutter efficiency
A measure of the total light passed by a shutter during an exposure, compared with the light that could be passed by an...
silicon carbide light-emitting diodes
Silicon carbide (SiC) light-emitting diodes (LEDs) are semiconductor devices that emit light when an electric current is...
detective quantum efficiency
The square of the ratio of the measured detectivity to the theoretical maximum detectivity.
optical grating reflectance evaluator
A device for measuring diffraction grating efficiency at any angle of incidence, consisting of a reflectometer wherein the...
microlens array
A microlens array is a grid-like structure composed of numerous small lenses, typically arranged in a regular pattern. Each...
transducer
A transducer is a device or component that converts one form of energy into another. It is commonly used in various fields,...
Mylar
E.I. duPont's trade name for a polyester film. The most practical beamsplitter for use beyond the 15-µm wavelength...
optical assembly
An optical assembly refers to a collection of optical components that are carefully arranged and aligned to perform a...
GaAlAs laser
A GaAlAs laser is a type of semiconductor laser diode that emits light in the near-infrared region of the electromagnetic...
Fresnel lens
A Fresnel lens is a type of optical lens that consists of a series of concentric grooves or steps carved into a flat, thin...
halogen lamp
A halogen lamp, also known as a tungsten halogen, quartz-halogen, or quartz iodine lamp, is an incandescent lamp that uses a...
infrared lens
An infrared lens is an optical component specifically designed and optimized for transmitting, focusing, or manipulating...
neuromorphic
Neuromorphic refers to the design and development of computing systems or devices that are inspired by the structure and...
efficiency
As applied to a device or machine, the ratio of total power input to the usable power output of the device.
optical combiner
An optical combiner, in the context of optics and display technologies, refers to a device or component that combines...
flow chemistry
Flow chemistry, also known as continuous-flow chemistry, is a chemical manufacturing process where reactions take place in a...
freeform optics
Freeform optics refers to the design and fabrication of optical surfaces that do not follow traditional symmetric shapes,...
back-illuminated CCD
A CCD that has been reduced in thickness by etching so that light passes through the back layers of the CCD. This type of...
spectral luminous efficiency
Ratio of the radiant flux at a particular wavelength lm to that at any other wavelength l, such that both radiations produce...
complementary metal-oxide semiconductor
Complementary metal-oxide-semiconductor (CMOS) refers to a technology used in the fabrication of integrated circuits,...
optical fiber optic switches
Optical fiber optic switches are devices used in optical fiber communication systems to selectively route optical signals...
double-clad fiber
Double-clad fiber (DCF) is a specialized optical fiber that features two concentric cladding layers surrounding a core. The...
quantum efficiency
Quantum efficiency (QE) is a measure of the effectiveness with which a device or system, typically in the context 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...
micro-robotics
Micro-robotics refers to the field of robotics that involves the design, development, and application of miniature robotic...
fatigue
The decrease of a component's efficiency, or a reduction in a material's light sensitivity, as the result of accumulated...
quantum cascade laser
A quantum cascade laser (QCL) is a type of semiconductor laser that operates based on the principles of quantum mechanics....
responsive quantum efficiency
The number of electrons emitted per photon incident upon a photodetector.
pushbroom scanning
Pushbroom scanning is a technique used in remote sensing and imaging systems, particularly in satellite and aerial sensors,...
cathode radiant sensitivity
Cathode radiant sensitivity refers to the ability of a photocathode to convert incident radiant energy, typically in the...
charge-transfer efficiency
In a charge-coupled device, the percentage of each charge packet that is carried over to the next stage of the transport...
remote inspection
Remote inspection refers to the process of inspecting, evaluating, or monitoring assets, equipment, infrastructure, or...
multifibers
An array of optically distinct fibers that are fused into one strand. They are used to keep the resolution efficiency of the...
micro-LED
Micro-LED (micro-light-emitting diode) refers to a technology that involves the use of very small light-emitting diodes to...
diode laser
A diode laser is a type of laser that uses a semiconductor diode as the active medium to generate coherent light....
gallium nitride
Gallium nitride (GaN) is a compound made up of gallium (Ga) and nitrogen (N). It is a wide-bandgap semiconductor material...
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...
laser interferometer
An interferometer that uses a laser as its light source. The purely monochromatic nature of the laser results in improved...
perovskite
The term perovskite refers to a specific crystal structure commonly found in various materials. Perovskite structures have a...
digital twin
A digital twin refers to a virtual representation or digital counterpart of a physical object, system, or process. This...
ultraviolet reflectance
Ultraviolet reflectance refers to the ability of a material or surface to reflect UV light. Ultraviolet light is...
organic light-emitting diode
An organic light-emitting diode (OLED) is a type of light-emitting diode (LED) technology that utilizes organic compounds to...
laser marking
Laser marking is a process in which a laser beam is used to mark or engrave a surface by altering its properties or...
parallel scanning
Parallel scanning refers to a method of acquiring data or images simultaneously from multiple sources or in parallel, rather...
power modulation
Power modulation refers to the intentional variation of power levels in a signal, often in the context of electronic...
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...
recombinase polymerase amplification
Recombinase polymerase amplification (RPA) is a molecular biology technique used to rapidly amplify specific DNA or RNA...
assist gas
A gas, such as oxygen, that improves the speed and efficiency of a laser cutter or welder when applied to the work surface,...
interferometric modulator display
Interferometric modulator display (IMOD) is a type of display technology used in electronic devices, known for its energy...
optogenetics
A discipline that combines optics and genetics to enable the use of light to stimulate and control cells in living tissue,...
antireflection coating
An antireflection coating (AR coating) is a thin film or coating applied to optical surfaces, such as lenses or windows, to...
dichroic coating
A dichroic coating, also known as a dichroic filter or dichroic mirror, is an optical coating designed to selectively...
reflection grating
A reflection grating is an optical component that consists of a series of closely spaced, parallel reflecting surfaces or...
frame rate
Frame rate refers to the frequency at which consecutive images, or frames, are displayed in a video sequence. It is...
slicing and cutting machines - for crystals, quartz, glass, etc.
A crystal, glass, or quartz slicing and cutting machine is a specialized piece of equipment used in the manufacturing...
photovoltaic cell
A photovoltaic cell, commonly known as a solar cell, is a semiconductor device that directly converts light energy into...
quantum dot light-emitting diode
Quantum dot light-emitting diode (QLED) is a display technology that utilizes quantum dots, which are semiconductor...
law of reversibility
In physics, the law of reversibility is often associated with the concept of reversibility in thermodynamics. The law...
atomic scattering factor
The efficiency of scattering by an atom in a particular direction, expressed as: where AA is the amplitude of the wave from...
light source efficiency

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