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pattern Dictionary Terms

spectral signature
A spectral signature, in the context of remote sensing and spectroscopy, refers to the unique pattern or characteristic...
deep ultraviolet
Deep ultraviolet (DUV or deep-UV) refers to a specific range of ultraviolet light with shorter wavelengths than those in the...
x-ray diffraction
The bending of x-rays by the regular layers of molecules in a crystal acting like a very small diffraction grating. The...
3D laser line profile sensor
A 3D profile sensor, also known as a 3D profiling sensor or 3D depth sensor, is a technology that is used to capture and...
structured illumination microscopy
Structured illumination microscopy (SIM) is an advanced optical imaging technique used in microscopy to enhance the...
electron-beam lithography system
An electron-beam lithography (EBL) system is a sophisticated nanofabrication tool used in the semiconductor industry and...
holography
Holography is a technique used to capture and reconstruct three-dimensional images using the principles of interference and...
transverse mode
In the context of optics and lasers, a transverse mode refers to a specific spatial pattern of the electric field within the...
light pattern
In optics, a pattern, such as the Buchmann-Meyer pattern, that may be viewed when the record surface is illuminated by a...
coded disc
A reticle carrying patterns of various forms that can be rotated in an optical beam to cause variations in the intensity of...
electron-gun system
An electron-gun system is an assembly used to generate and control a focused beam of electrons. Electron guns find...
photoresist
Photoresist is a light-sensitive material used in photolithography processes, particularly in the fabrication of...
x-ray analysis
The series of processes used to identify and evaluate crystal structure by using crystalline solids to diffract x-rays. In...
lens testing equipment
Lens testing equipment refers to a range of specialized tools and instruments used to evaluate the optical performance,...
microlens array
A microlens array is a grid-like structure composed of numerous small lenses, typically arranged in a regular pattern. Each...
hybrid mosaic on stacked silicon
A sensor module used in advanced pattern recognition systems, containing signal-processing integrated circuits stacked and...
photoelectron holography
A technique proposed for studying the atomic structure of crystals by measuring the interference pattern generated when the...
Fabry-Perot spectroscopy
The spectroscopic analysis of interference patterns using a monochannel spectrometer, spectrograph or multichannel...
simultaneous exposure and development
The process, used with a positive photoresist, in which the photoresist is immersed in developing chemicals while being...
xerography
A printing process of electrostatic electrophotography that uses a photoconductive insulating medium, in conjunction with...
Secondary Speckle Pattern
A self-interference effect that generates random patterns; secondary speckle pattern (SSP) typically occurs in diffuse...
cathode-ray tube faceplate
A fiber optic end plate constructed by drawing a bundle of parallel fibers embedded in glass and cutting it into thin...
beam shaper
A beam shaper is an optical device or system designed to modify the spatial profile or intensity distribution of a laser or...
superresolution
Superresolution refers to the enhancement or improvement of the spatial resolution beyond the conventional limits imposed by...
zero order
In an interference pattern, that point where there is no difference between the optical paths of the interfacing wavefronts.
rolling shutter artifacts
Rolling shutter artifacts are distortions or visual anomalies that can occur in images or videos captured by cameras with...
machine vision lighting
Machine vision lighting refers to the use of specific lighting techniques and equipment in the field of machine vision,...
far-field region
A region far from an aperture or source where the diffraction pattern is essentially the same as that at infinity. Changes...
lensless microscopy
Lensless microscopy, also known as computational or holographic microscopy, is an imaging technique that captures and...
laser powder bed fusion
Laser powder bed fusion (LPBF) is a type of additive manufacturing (AM) or 3D printing technology that uses a high-power...
microbubble resonator
A microbubble resonator is a device used in photonics and optical physics for the precise manipulation of light waves. It...
Laue pattern
The photographic record of the diffracted beams formed when heterogeneous x-rays emerging from a pinhole or slit impinge...
FTIR spectrometer
FTIR (Fourier transform infrared) spectrometer is a powerful analytical instrument used to obtain an infrared spectrum of...
computer-calculated diffraction pattern
The use of computer analysis in the calculation of diffraction patterns for information on the design of optical systems. In...
mask
1. A framelike structure that serves to restrict the viewing area of the screen when placed before a television picture...
optical coherence tomography
Optical coherence tomography (OCT) is a non-invasive imaging technique used in medical and scientific fields to capture...
magneto-optic readout device
A device using the Kerr effect to read back the signals from mechanically recorded tapes and discs. It consists of a light...
optogenetics
A discipline that combines optics and genetics to enable the use of light to stimulate and control cells in living tissue,...
space pattern
On a test chart, the pattern designed to direct and measure geometric distortion.
wedge ring detector
A diffraction pattern sampling unit composed of a 32-element monolithic silicon photodiode array and a readout unit. The...
Bessel functions
Two formulas used in diffractometer analysis, the first giving the individual diffraction patterns of each aperture, the...
halftone screen
A plate containing a uniform pattern of transparent holes in an opaque background, the clear area being nearly equal to the...
extreme ultraviolet
Extreme ultraviolet (EUV) refers to a specific range of electromagnetic radiation in the ultraviolet part of the spectrum....
reticulation
The formation of a distinct, irregular surface pattern on a photographic emulsion due to differential swelling of the...
Airy disc
The central peak (including everything interior to the first zero or dark ring) of the focal diffraction pattern of a...
modulation transfer function
Also called sine wave response and contrast transfer function. The modulation transfer function is the ratio of the...
crystallogram
The photographic record of the diffraction pattern formed when x-rays pass through a crystal.
fiber optic gyroscope
A fiber optic gyroscope (FOG) is a type of gyroscope that uses the interference of light waves to detect changes in...
digital densitometry
Pictorial information processing in which the processed picture shows a family of equidensity lines or bands coded with...
spherical microintegrated lens
A tiny lens (as small as 100 µm in diameter) used to focus light on charge-coupled devices, formed by heating a...
machine learning
Machine learning (ML) is a subset of artificial intelligence (AI) that focuses on the development of algorithms and...
full width half maximum
Full width half maximum (FWHM) is a measure of the extent of a function. Given by the difference between the two extreme...
halation
1. In a cathode-ray tube, the glow surrounding a bright spot that appears on the fluorescent screen as the result of the...
radiation pattern
Relative power distribution as a function of position or angle.
projection thermography
The measurement of surface temperature by a thermograph that forms a pattern of the heat radiated by the surface on a...
speckle pattern
A power intensity pattern produced by the mutual interference of partially coherent beams that are subject to minute...
lithography
Lithography is a key process used in microfabrication and semiconductor manufacturing to create intricate patterns on the...
photolithography
Photolithography is a key process in the manufacturing of semiconductor devices, integrated circuits, and...
flying spot
The moving spot of light emitted by a source, generally a cathode-ray tube, to illuminate specific points of an area...
interferogram
A photographic or electronic recording of an optical interference pattern.
spatial light interference microscopy
Spatial light interference microscopy (SLIM) is an optical microscopy technique that belongs to the category of quantitative...
raster scan display
A display in which regeneration takes place serially at a fixed speed in a set pattern through the scan lines.
coherent fiber bundle
A coherent fiber bundle (CFB), also known as a coherent fiber optic bundle, is an assembly of multiple optical fibers...
apodization
The use of a variable transmission filter at the aperture stop of a lens to modify its diffraction pattern. Reduced...
infrared optic
Infrared optics refer to optical components and systems designed to manipulate and control infrared (IR) light, which lies...
liquid crystal on silicon
Liquid crystal on silicon (LCoS) is a display technology that combines liquid crystal materials with silicon-based...
machine vision
Machine vision, also known as computer vision or computer sight, refers to the technology that enables machines, typically...
x-ray spectrograph
An instrument that is used to chart x-ray diffraction patterns, such as an x-ray spectrometer having photographic or other...
photographic sound recorder
A system in which the electrical signal embedded within an audio input signal is converted to a modulated light pattern and...
x-ray film
A film or plate that is usually coated on both sides with a very fast emulsion that is sensitive to x-rays, and used to...
color perception test equipment
Equipment for testing an observer's color vision. Some tests require the identification or ordering of colored samples. The...
Rayleigh interferometer
A device that is used to determine the index of refraction of a gas or liquid through the interference patterns formed by...
x-ray analysis trial
The testing by hypothesizing a likely crystal structure, computing a test x-ray diffraction pattern and comparing this to...
wafer
In the context of electronics and semiconductor manufacturing, a wafer refers to a thin, flat disk or substrate made of a...
phase mask
In optics and photolithography, a phase mask refers to a device that modifies the phase of light waves passing through it....
microwave mapping
The pattern of microwave field intensity that can be obtained by detecting the minute expansion of a microwave absorber slab...
nodal testing
The measurement of first- and higher order properties of a lens and its formed image, including effective focal length, back...
Mie scattering
Mie scattering, named after the German physicist Gustav Mie, refers to the scattering of electromagnetic radiation (such as...
fiber Bragg grating
A fiber Bragg grating (FBG) is a type of optical filter that is inscribed or "written" into the core of an optical fiber. It...
Mach-Zehnder interferometer
A Mach-Zehnder interferometer is an optical device used to measure the phase difference between two collimated beams of...
diffuser
An optical diffuser is an optical component or material designed to scatter or diffuse light that passes through it. It is...
lattice
In photonics, a lattice refers to a periodic arrangement of optical elements or structures, often on a microscopic or...
MSM photodiode
A metal-semiconductor-metal (MSM) photodiode is a type of photodetector that consists of metal electrodes on a semiconductor...
latent image
The pattern of physical or chemical changes that has taken place in a photographic emulsion, by its exposure to light, that...
low-coherence interference microscope
An interference microscope that uses a light beam originating from a low-coherence light source. The sample is placed in one...
edge-emitting LED
An edge-emitting light-emitting diode is a type of LED structure where light emission occurs primarily along the edge of the...
photomask
A photomask, also known simply as a mask or reticle, is a key component in the photolithography process used in...
remote sensing
Remote sensing is a method of data collection and observation where information about objects, areas, or phenomena on...
structuring element
The pattern used as a probe in morphological image processing to manipulate the size and shape of objects in an image.
time-averaged holography
Although low in sensitivity (approximately 10-7 m for helium-neon lasers), this holographic technique permits quantitative...
speckle metrology
Refers to the variety of techniques that use the interference pattern produced by laser light diffusely reflected by an...
laser painting
Extended period exposure photographs of a laser light created with various patterns within full image (laser graffiti).
laser pattern generation
Production of a repeated image of a transmitted beam through a diffractive optical element such as a holographic card or...
scatterplate
A flat plate having its surface formed into a random pattern by abrasives. Radiation wavelengths that are longer than the...
optical barcode reader
An optical barcode reader, commonly known as a barcode scanner, is a device that uses optical technology to capture and...
field pattern
Intensity of emission as a function of direction in a given plane.
scalar diffraction theory
Scalar diffraction theory is a simplified approach used to describe the propagation of electromagnetic waves, particularly...
whole slide imaging
Whole slide imaging (WSI), also known as virtual slide microscopy or digital pathology, is a technology that involves the...
nanoimprint lithography
Nanoimprint lithography (NIL) is a nanolithography technique used for fabricating nanoscale patterns on a substrate. It is a...
differential interference contrast microscopy
Differential interference contrast (DIC) microscopy, also known as Nomarski interference contrast microscopy, is an optical...
photon sieve
A photon sieve is an optical device used in the field of optics and imaging. It's designed to focus and shape light,...
photonic cavity
A photonic cavity, also known as an optical cavity, is a structure that confines electromagnetic radiation within a certain...
smectic phase
A form of liquid crystal in which flow does not take place in the usual manner. When examined with polarized light, the...
equidensitometry
1. The use of an electronic microdensitometer to measure points of equal density on a photographic deposit. 2. A technique...
virtual histology
Virtual histology refers to the use of digital technology and computational methods to simulate or recreate histological...
graphene
Graphene is a two-dimensional allotrope of carbon consisting of a single layer of carbon atoms arranged in a hexagonal...
quasi-Fourier transform
The transform defining that, if a reference beam is a divergent spherical wavefront, then the reconstructed image will be...
pattern
A device that determines the lens shape in the cutting or edging phase of fabrication. It also is used to denote the...
Bragg method of crystal analysis
A technique in which a beam of x-rays is directed against a crystal, the atoms of which, because of their lattice...
optical testing instrument
An optical testing instrument is a device or system used to evaluate and measure the performance, quality, and...
laser texturing
Laser texturing is a manufacturing process that involves using a laser beam to selectively modify the surface of a material,...
barrel distortion
The negative distortion that causes a square grid pattern to be imaged as barrel-shaped.
multiple slits
The series of equally spaced parallel slits that make up a scanning aperture in place of a single slit, in the scanning of a...
computer-generated hologram
A computer-generated hologram (CGH) is a holographic image produced using computational methods and algorithms, rather than...
phonon
A phonon is a quantum of vibrational energy associated with the periodic motion of atoms or molecules in a crystalline...
fractional photothermolysis
A laser skin-resurfacing method that creates microscopic thermal wounds referred to as microscopic treatment zones (MTZs),...
computer-generated holographic scanner
A phase reflection scanner that eliminates the need for a complex translation device while maintaining a high-energy-density...
biometrics
Biometrics refers to the automated recognition of individuals based on their physiological or behavioral characteristics....
double-pulsed holographic interferometry
Interferometric measurement of the interference pattern recorded when a complex object is illuminated by two laser pulses...
spectroscopy
Spectroscopy is a technique used in the study of interactions between matter and electromagnetic radiation. It involves...
Fraunhofer hologram
A far-field pattern holographically reproduced image that is categorically considered with three-dimensional lensless...
micro-optics
Micro-optics refers to the design, fabrication, and application of optical components and systems at a microscale level....
reticle
An optical element located at an image plane, containing a pattern that assists in pointing an instrument or measuring...
diffraction pattern
The interference pattern formed by light waves diffracted at the edges of an object as seen on a screen placed in their path.
feature extraction
In image processing and machine vision, the process in which an initial measurement pattern or some subsequence of...
direct laser interference patterning
Also called DLIP, a high-speed, high-resolution processing technique that uses high-power, pulsed laser systems to directly...
mosaic detector array
A group of photosensors arranged in a grid-like pattern covering the entire field of view, enabling them to record it all at...
remote active spectrometer
A device employed to identify toxic agents lingering on the ground or in the air from up to three miles away, by using laser...
electron speckle pattern interferometry
A method for detecting vibration amplitudes analogous to image holography, except that the film emulsion is replaced by a...
x-ray spectrogram
A chart of an x-ray diffraction pattern.
Monte Carlo simulation
Simulation of radiative transfer in which each photon is generated by a source and its path through the medium is...
Young's two-slit interference
The method by which Thomas Young in 1802 disproved Newton's corpuscular theory of light by the formation of interference...
Strehl ratio
The ratio of the illuminance at the peak of the diffraction pattern of an aberrated point image to that at the peak of an...
end-fire coupling
End-fire coupling refers to a method of coupling energy into or out of a waveguide, transmission line, or antenna, where the...
Babinet principle
The principle stating that two diffraction screens, one being exactly the negative of the other, will form the same...
near-field region
The area closest to an aperture or source where the diffraction pattern differs substantially from that observed at an...
optical Fourier transform
The optical Fourier transform is a mathematical operation applied to optical signals that involves transforming a spatial...
quantitative phase imaging
Quantitative phase imaging (QPI) is an advanced imaging technique used in microscopy to measure and analyze the optical...
etalon
An etalon is an optical device that consists of two parallel reflecting surfaces separated by a precise and known distance....
moiré pattern
The resulting interference pattern generated from moiré deflectometry, the moiré pattern is a pattern...
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...
camera tube target
The storage surface of an electron beam tube that is scanned by an electron beam to generate an output-signal current...
sonosensitive plate
Device that uses a coherent reference wave to record the interference patterns produced by incident ultrasonic waves on an...
Linnik interference microscope
A Michelson-type interference microscope used to produce interference patterns of reflective specimens through the...
uniphase interference
In interferometry, the result of superimposing two wavefronts of identical shape, yielding a uniform intensity interference...
diffraction grating
A diffraction grating is an optical component consisting of a surface with a periodic structure of equally spaced, parallel...
stadia scale
A reticle pattern in a surveying instrument consisting of parallel lines that can be superimposed on a calibrated rod,...
Fraunhofer diffraction pattern
holographic interferogram
The three-dimensional interference pattern of fringes that is recorded on a holographic plate to facilitate the study of a...
holographic interferometry
The interferometric analysis of a complex object by utilizing the three-dimensional hologram. By causing a laser beam to...
powder radiography
A technique used in radiography to determine a crystal's structure by obtaining radiographs of it in powder form, normally...
laser annealing
Laser annealing is a process that involves using a laser beam to heat and modify the microstructure of a material, typically...
transverse scattering
The method for measuring the index profile of an optical fiber or preform by illuminating it coherently and transversely to...
electro-optic modulator
An electro-optic modulator (EOM) is a device used to modulate the amplitude, phase, or polarization of light waves using an...
cutting
The process of forming a lens to a given pattern, or of cutting a piece of glass along the line of scratch.
modulation transfer function analysis/measurement equipment
MTF analysis/measurement equipment refers to instruments and tools used to measure and analyze the modulation transfer...
far-field diffraction pattern
The diffraction pattern of a source such as a light-emitting diode, injection laser diode or the output end of an optical...
camera tube
The electron beam tube of a television camera that converts an optical image into a pattern of electrostatic charges and...
double-pulsed holography
Holographic recording whereby the object is illuminated by two pulses, separated by a time interval, from a Q-switched laser...
micro ion milling
Process developed for the production of high-resolution patterns in electro- and magneto-optics. These high-generation...
diffraction
As a wavefront of light passes by an opaque edge or through an opening, secondary weaker wavefronts are generated,...
Fizeau fringes
Fizeau fringes are interference fringes observed in an interferometer, specifically in a Fizeau interferometer. The Fizeau...
selective laser melting
Selective laser melting (SLM) is an additive manufacturing (AM) or 3D printing technology that belongs to the powder bed...
Rayleigh scattering
Rayleigh scattering is a phenomenon that occurs when light waves interact with particles or molecules that are much smaller...
optical grating
An optical grating, in the context of optics and physics, refers to a device with a periodic structure of closely spaced,...
Dammann grating
A Dammann grating is a type of diffractive optical element (DOE) used to create an array of equally spaced,...
nodal bench
A bench with instrumentation including a collimator, a microscope, positioners and a nodal slide used to rotate a lens about...
optical lattice
A periodic structure formed by intersecting or superimposed laser beams. These beams can trap atoms in low-potential...
telemeter
1. The term used to describe any of the many instruments used to remotely record physical dimensions, such as strain,...
mode
1. The characteristic of how light propagates through a waveguide that can be designated by a radiation pattern in a plane...
electron scanning
The deflection of a beam of electrons, at regular intervals, across a cathode-ray tube screen, according to a definite...
optical transform image modulation
A technique for detecting and measuring atmospheric pollution, in which an oscillating mirror directs half the incoming...
emission spectrum
An emission spectrum is a graphical representation or a characteristic pattern of the wavelengths or frequencies of light...
Lissajous pattern
The pattern, formed by a character generation cathode-ray tube system, in which the characters are made up of wave shapes...
dewetting
Dewetting is a phenomenon in materials science and physics where a thin film or coating spontaneously undergoes a process of...
holographic camera
A holographic camera, also known as a holographic imaging system or holographic recorder, is a specialized device used to...
fixed-pattern noise
Fixed-pattern noise is the measure of the static (nontemporal) differences between pixels when the detector is evenly...
FMCW lidar
FMCW lidar stands for frequency-modulated continuous wave lidar. It is a type of lidar (light detection and ranging)...
metalens
A metalens, short for "metasurface lens," is a type of optical lens that uses nanostructured materials to manipulate light...
well plate
A well plate, also known as a microplate or microtiter plate, is a flat plate with multiple small wells or depressions...
etaloning
Etaloning is an optical phenomenon that occurs in imaging systems, particularly in devices such as spectrometers,...
character generator
Computer hardware or firmware that accesses character patterns stored in read-only memory and displays them at specific...
computer vision
Computer vision enables computers to interpret and make decisions based on visual data, such as images and videos. It...
raster
The pattern of lines traced by rectilinear scanning in display systems.
infrared detector
An infrared detector is a device that is used to detect and measure infrared radiation, which lies beyond the visible...
egg-crating
A weight reducing method whereby material from the rear of a reflector is removed leaving a pattern of ribs normal to the...
pencil beam
In astronomy, the main lobe of an antenna pattern that has a small angular extent in two mutually perpendicular directions....
eye pattern
A pattern on an oscilloscope display that consists of a string of shapes that resemble eyes. Because the pattern becomes...
diffraction rings
1. The ring patterns of light that seem to encircle particles in the field of a microscope. 2. See Newton's rings.
iconoscope
A camera tube that employs a high-velocity electron beam to scan a photoemissive mosaic and to store electrical charge...
acoustical hologram
The recorded interference pattern formed by the interference of two sound beams.
acoustical holography
The optical reconstruction of image information contained in a sound field. First the diffraction pattern, formed by an...
mode beating
In optics, "mode beating" refers to an interference phenomenon that can occur in laser systems with multiple longitudinal...
liquid-surface holography
The acoustical holographic process in which the hologram consists of slight elevations in a liquid surface, in the areas of...
cathode-ray tube pattern
The luminous trace formed on the cathode-ray tube screen by the motion of the electron beam.
moiré deflectometry
An optical interference technique widely utilized as a method of nondestructive testing when determining the ray deflection...
Weissenberg method
The Weissenberg method, named after the German physicist Karl Weissenberg, is a technique used in x-ray crystallography for...
test pattern
neural network
A computing paradigm that attempts to process information in a manner similar to that of the brain; it differs from...
photoresponse nonuniformity
Noise created by patterns imaged on a CCD surface. Pixel sensitivity is altered by responsivity during illumination.
acceptance pattern
A curve expressing an optical fiber's total transmitted power as a function of its launch angle at the input.
mixed signal oscilloscope
A mixed-signal oscilloscope (MSO) is a type of electronic test instrument that combines the capabilities of both a...
Nipkow disc scanner
A device consisting of a disc with a spiral arrangement of holes that is used to convert visible patterns into electrical...
beam profiling
Beam profiling is a technique used to characterize and analyze the spatial intensity distribution of a laser beam. It...
scattered fringe period
Measure of the interference fringe pattern produced by the forward scattering of light by an optical fiber; the fringe...
electrostatography
The recording of patterns by the production and use of latent electrostatic charge patterns. See electrostatic process.
stroke pattern
The pattern formed by a character generation cathode-ray tube system, in which the characters are composed of a sequence of...
sonoptography
The process whereby sound waves are employed to form a three-dimensional image of an object. The process involves generally:...
structured light
The projection of a plane or grid pattern of light onto an object. It can be used for the determination of three-dimensional...
electro-optic Fabry-Perot spectroscopy
The spectroscopic analysis of interference patterns using an electronic imaging tube with a Fabry-Perot interferometer to...
digital holographic microscopy
Digital holographic microscopy (DHM) is an advanced imaging technique that combines holography and digital image processing...
photoplethysmography
Photoplethysmography (PPG) is a non-invasive optical technique used to detect changes in blood volume in tissues. It...
reflective spectroscopy
Reflectance spectroscopy is a technique used to analyze the reflective properties of materials across various wavelengths of...
sine wave target
Bar pattern represented as a sine curve in which the light distribution varies in one direction.
piezo-optical transducer
A structure consisting of a thin film of liquid crystal sandwiched between light-polarizing filters that have received a...
objective grating
A coarse diffraction grating that is used to form a scale of intensities to determine the relative magnitudes of stars. The...
azimuthal polarization
Azimuthal polarization refers to a specific polarization state of light where the electric field vector of the...
xeroradiography
A printing process of electrostatic electrophotography that uses a photoconductive insulating medium, in conjunction with...
masks for evaporation/deposition
In the context of thin film deposition processes such as evaporation or sputtering, masks are used to selectively deposit...
holographic optical element
A component used to modify light rays by diffraction; the HOE is produced by recording the interference pattern of two laser...
phase
In optics and photonics, "phase" refers to a property of electromagnetic waves, such as light, that describes the position...
artificial intelligence
The ability of a machine to perform certain complex functions normally associated with human intelligence, such as judgment,...
near-infrared spectrometer
A near-infrared (NIR) spectrometer is an analytical instrument used to measure the absorption, transmission, or reflection...
morphological processing
A set of algorithms used to study the structural and spatial characteristics of objects in a digitized image for...
laser sintering
Laser sintering is an additive manufacturing (AM) or 3D printing technology that involves using a laser to selectively fuse...
radiographic amplifier screen
A solid-state panel of the photoconductor-electroluminescent type. The photoconductive layer, sensitive to x-rays, is coated...
optical coherence tomography imaging system
Optical coherence tomography (OCT) is an imaging technique used in medical diagnostics and biomedical research to obtain...
Smith-Baker microscope
A transmission interference microscope that produces interference patterns of a sample by using birefringent plates that...
remote inspection
Remote inspection refers to the process of inspecting, evaluating, or monitoring assets, equipment, infrastructure, or...
holographic grating
A holographic grating is a type of diffraction grating that is produced using holographic recording techniques. It consists...
phase-modulated sensor
A phase-modulated sensor is a type of sensor that uses modulation of the phase of a signal to measure changes in a physical...
deep learning
Deep learning is a subset of machine learning that involves the use of artificial neural networks to model and solve complex...
optical resolution
A measure of image quality produced by an optical system. May be specified in terms of cycles per millimeter, referencing a...
laser gyroscope
Counter propagating beams imaged along the same path in order to detect rotation. Precise rotation is measured through...
hologram
An interference pattern that is recorded on a high-resolution plate, the two interfering beams formed by a coherent beam...
microwave holography
The holographic recording of the pattern formed by two sets of coherent microwaves that interfere at a scanning plane. A...
metasurfaces
Metasurfaces are two-dimensional arrays of subwavelength-scale artificial structures, often referred to as meta-atoms or...
x-ray lithography
A method of projecting integrated circuit patterns on a silicon wafer using x-ray wavelengths focused through a special mask.
scanning electron microscopy
Scanning electron microscopy (SEM) is an advanced imaging technique used in microscopy to obtain high-resolution,...
laser speckle
Sparkling granular pattern that is observed when an object diffusely reflects coincident laser light. Speckle appears as an...
Jamin refractometer
An instrument designed to measure the index of refraction of a gas by the interference patterns formed by two beams, one of...
holographic lens
A photographic recording of interference patterns between a plane wave and a spherical wave on a high-resolution...
television line number
The value equal to the raster height divided by the half-period of a periodic test pattern.
degree of coherence
A quantitative measurement of the coherence of a light source; equal to the visibility (V) of the fringes of a two-beam...

(244 results found)

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