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computer Dictionary Terms

qubit
A qubit, short for quantum bit, is the fundamental unit of information in quantum computing and quantum information processing. Unlike classical bits, which can exist in one of two states (0 or 1), qubits can exist in multiple states simultaneously,...
fan-out
The distribution of one signal to more than one location. In a digital computer, it refers to the number of outputs that can...
optical design software
Optical design software refers to specialized computer programs used by optical engineers, physicists, and designers to...
computer-calculated diffraction pattern
The use of computer analysis in the calculation of diffraction patterns for information on the design of optical systems. In...
optical correlator
A device incorporating a spatial light modulator and a reference filter; used for matching an input optical waveform or...
programmable logic controller
In computerized industrial process control, the element that determines the choice and sequence of operations dependent on...
Polarization Imaging
A subsurface imaging technique based upon the polarization of light reflected off an object. The polarization of reflected...
digital twin
A digital twin refers to a virtual representation or digital counterpart of a physical object, system, or process. This...
digital camera
A digital camera is a device that captures and records still images or video in digital format. Unlike traditional film...
computer-output microfilm system
A camera system capable of producing microfilm copies of computerized data presented on a screen.
algorithm
A precisely defined series of steps that describes how a computer performs a task.
local area network
Data communications network in a clearly defined geographical location, and extending no more than a few miles in length. It...
optical design and engineering services
Optical design and engineering services involve the development, customization, and optimization of optical systems and...
electron multiplication charge-coupled device camera
An EMCCD (electron-multiplying charge-coupled device) camera is a type of scientific camera specifically designed for...
function generator
A computer hardware unit that generates required functional information on the screen by controlling CRT beam movements or...
lead zirconate titanate
A ferroelectric polycrystalline ceramic material used in optical memories for computers and as a piezoelectric transducer.
air-to-ground phototransmission system
A category of systems designed to communicate a photo taken from the air (e.g., aircraft, balloon, satellite) to a ground...
photonic computer
A type of computer in which the electronic circuits, which process data serially, are replaced by photonic circuits capable...
additive manufacturing
Additive manufacturing (AM), also known as 3D printing, is a manufacturing process that involves creating three-dimensional...
computer numerically controlled grinding
Computer numerically controlled (CNC) grinding is a manufacturing process that utilizes computerized controls and precision...
optical computer
multiple instruction/multiple data
A computer architecture used in parallel processing whereby all the processing elements are operating under their own local...
cache
A portion of computer memory that is used for temporary storage of frequently accessed data. Substantially increases...
high-speed motion camera
A high-speed motion camera, also known as a high-speed camera or slow-motion camera, is a specialized imaging device...
optical page reader
An optical scanning system found in most computer scanners that can read documents, often in many type styles, and convert...
augmented reality
Augmented reality (AR) is a technology that integrates digital information, typically in the form of computer-generated...
optical tape recorder
An instrument used for video or computer data storage in which a laser optical head is used to write digital information...
3D printing
3D printing, also known as additive manufacturing (AM), is a manufacturing process that builds three-dimensional objects...
cell
1. A single unit in a device for changing radiant energy to electrical energy or for controlling current flow in a circuit....
spatial resolution
Spatial resolution refers to the level of detail or granularity in an image or a spatial dataset. It is a measure of the...
photogrammetry
Photogrammetry is a technique used to obtain accurate three-dimensional measurements of objects and environments through the...
thin-film memory
A memory device consisting of thin disks of a magnetic substance deposited on a nonmagnetic substrate for use in a computer.
red, green, blue
RGB stands for red, green, blue, which are the primary colors of light used in additive color mixing. The RGB color model is...
design and engineering consulting services
Design and engineering consulting services refer to professional services provided by specialized firms or individuals to...
tracking system
A controlled motion system that may use a telescope, camera or antenna to follow accurately a satellite, missile, vehicle or...
optical manufacturing tools and machinery
Optical manufacturing tools and machinery encompass a wide range of equipment, instruments, and systems used in the...
single instruction/multiple data
A computer architecture used in parallel processing whereby the processing elements are directed by a single, central...
ray tracing
Ray tracing is a rendering technique used in computer graphics to simulate the way light interacts with objects in a scene....
quantum
The term quantum refers to the fundamental unit or discrete amount of a physical quantity involved in interactions at the...
holographic grating
A holographic grating is a type of diffraction grating that is produced using holographic recording techniques. It consists...
light pen
A handheld, light-sensitive device that is used with a display console to directly change, measure or erase the visual...
transputer
A computer whose architecture contains several CPU chips arranged in parallel. Often used in image processing systems.
digital filter
A linear computation or algorithm performed on a selected series in the form of an input signal that produces a new series...
photostore
The photographic recording of data, in binary form, for storage in memory. Exposure is achieved by a cathode-ray tube or by...
multiconfiguration mode
Used in computer design for optical systems with common parts and different applications.
computer animation
The use of a computer to generate a series of interrelated images so that the images give the illusion of movement in space...
bit mapping
In computer graphics, the assignment of each pixel on a display screen to its own switch in the computer memory.
Manufacturing Automation Protocol
A computerized token-passing local area network (LAN) configuration adopted by General Motors for real time control over the...
film thickness gauge
An interferometer spectrometer designed to measure thicknesses of thin films or layers by recording the interferogram and by...
card reader
A system that generally uses a photodetector to decode punched cards for information, or for input to a computer, by sensing...
cut plane
In computer graphics, intersection of a plane with a three-dimensional object to create a sectional view.
error function
A single number, defined by the computer program or the user that expresses the performance of an optical system. Also known...
CoaXPress
CoaXPress (CoaXPress or CXP) is a standardized digital interface and communication protocol used primarily in machine vision...
character read-out system
A photoelectrically controlled, alphanumeric reading device that converts characters to audible or sorting signals which can...
network interface card
A network interface card (NIC), also known as a network adapter or LAN adapter, is a hardware component that allows...
orthonormalization
Optimization method used in optical design computer programs that employs a variable-by-variable approach to construct new...
sputtering equipment
Sputtering equipment is machinery used in the process of physical vapor deposition (PVD), specifically sputtering....
motion controller
In optics, a motion controller refers to a device or system that precisely controls the movement of optical components, such...
mask proximity correction
A technique used in photolithography of computer chips to compensate for errors caused by the proximity effect, which...
freeform mirrors
Freeform mirrors refer to reflective optical components that deviate from traditional symmetric or rotationally symmetric...
kinoform filter
A computer-generated kinoform used for data processing because of its use of incoherent light and its wide field of view,...
deep learning
Deep learning is a subset of machine learning that involves the use of artificial neural networks to model and solve complex...
aperture card
A combination 80-column computer card containing a 35-mm microfilm frame. Reference data can be punched onto the card to...
modulated grating hologram
A computer-generated, phase-and-amplitude, off-axis hologram made by a multi-exposure technique that uses three computer...
computer-generated holographic scanner
A phase reflection scanner that eliminates the need for a complex translation device while maintaining a high-energy-density...
speckle imaging
A technique for obtaining improved resolution of images produced by large telescopes and distorted by the effects of...
virtual reality
Virtual reality (VR) is a computer-generated simulation of a three-dimensional environment or experience that can be...
damped least squares
An organizational method used in optical design computer programs. The technique produces one number (merit function) to...
magnetic bubble film
An amorphous film in which cylindrical bubbles of reverse magnetization can be formed to follow circuit paths usually made...
topology
Topology is a branch of mathematics that focuses on the properties of space that are preserved under continuous...
extreme ultraviolet
Extreme ultraviolet (EUV) refers to a specific range of electromagnetic radiation in the ultraviolet part of the spectrum....
computer-generated hologram
A computer-generated hologram (CGH) is a holographic image produced using computational methods and algorithms, rather than...
fluorescent screen
A fluorescent screen refers to a phosphorescent or fluorescent-coated surface that emits visible light when exposed to other...
custom optic
A custom optic refers to an optical component that is designed, manufactured, and tailored to meet specific requirements or...
lock-in amplifier
A lock-in amplifier is a specialized electronic instrument used to extract and measure small signals embedded in noise or...
linear actuator
High-precision motorized positioning device, often linked to computer control equipment.
universal product code
A system by which consumer products are assigned a bar code that is read by a scanner at a cash register, enabling...
organic light-emitting diode
An organic light-emitting diode (OLED) is a type of light-emitting diode (LED) technology that utilizes organic compounds to...
alpha
In computer imaging, a value representing opacity.
electron-gun system
An electron-gun system is an assembly used to generate and control a focused beam of electrons. Electron guns find...
Winchester drive
A sealed, hard, magnetic disc drive used for the storage of data in a computer system.
liquid crystal
Liquid crystals are a state of matter that exhibits properties intermediate between those of conventional liquids and solid...
optical coherence tomography imaging system
Optical coherence tomography (OCT) is an imaging technique used in medical diagnostics and biomedical research to obtain...
computer polarization holography
A technique used to store wavefront information on thin polarization information-recordable materials by controlling the...
computer graphics
Computer output in the form of pictorial representation (graphs, charts, drawings, etc.) that is displayed visually.
modulated zone plate
A zone plate produced by a computer and having a binary structure that can be etched into a chromium or quartz layer. It...
film recorder
An instrument designed to place nongraphic information, usually generated by a computer, onto photographic film. The...
thermal interface materials
Thermal interface materials (TIMs) are substances or compounds used to enhance the thermal conductivity between two surfaces...
pixel
A pixel, short for "picture element," is the smallest controllable element of a digital image or display. It is a...
GaN-based LEDs
Gallium nitride-based light-emitting diodes (GaN-based LEDs) are semiconductor devices that emit light when an electric...
GigE
GigE, short for gigabit Ethernet, refers to a standard for high-speed Ethernet communication, capable of transmitting data...
quantum dot light-emitting diode
Quantum dot light-emitting diode (QLED) is a display technology that utilizes quantum dots, which are semiconductor...
optical assembly
An optical assembly refers to a collection of optical components that are carefully arranged and aligned to perform a...
computer graphics metafile
A snapshot representation of the final image created by a computer program.
Peltier cooler
A Peltier cooler, also known as a thermoelectric cooler (TEC) or thermoelectric module, is a solid-state device that uses...
digital point system
A pixel-based computer graphics system that simulates the tools of an artist.
diffractive optics
Optical elements that use diffraction to control wavefronts. Diffractive optical elements include diffraction gratings,...
photoelectric reader
An input device for a computer that detects and reads the data, in the form of punched holes in cards, by light that is...
CCD camera
A CCD camera, or charge-coupled device camera, is a type of digital camera that utilizes a CCD image sensor to capture and...
texel
A contraction for "texture element." A base unit used in computer graphics that defines the surface of three-dimensional...
image processor
A device embodying a microprocessor that converts an image to digital form and then further enhances the image to prepare it...
image-enhancing equipment
Complex devices, often involving a computer, in which a photograph is scanned by a point of light, the amplitude of the...
refresh rate
Rate at which an image on a computer screen is redrawn (usually 50 or 60 Hz) to prevent flicker caused by the decay of the...
virtual histology
Virtual histology refers to the use of digital technology and computational methods to simulate or recreate histological...
logic circuit
A computer circuit that supplies the action of problem-solving functions or operations.
infrared light-emitting diode
An infrared light-emitting diode (IR LED) is a semiconductor device that emits infrared light when an electric current...
cathode-ray graphic display
A cathode-ray tube, driven by a computer, that receives impulses of information from the computer and displays it in a...
emissivity correction matrix
A computer-generated routine for achieving true-temperature readings in thermal infrared imaging systems.
neuromorphic
Neuromorphic refers to the design and development of computing systems or devices that are inspired by the structure and...
computer vision
Computer vision enables computers to interpret and make decisions based on visual data, such as images and videos. It...
alphanumeric generator
In computer graphics, a character generator that produces alphabetical and numerical characters with some punctuation and...
array processor
In image processing, a specially designed programmable computer peripheral that attaches to the host system for the purpose...
light field
The term light field refers to the spatial distribution of light rays traveling in all directions through a given space. It...
computer graphics workstation
The physical area containing an assembly of computer graphics equipment for presenting generated images and allowing...
character generator
Computer hardware or firmware that accesses character patterns stored in read-only memory and displays them at specific...
display console
A visual display used with a computer to give access to the many elements of data as an array of points. With the display...
input/output
I/O stands for input/output. In computing, it refers to the communication between a computer system or program and its...
MTF optimization
Computerized lens design algorithm that permits the lens MTF characteristic to be included and controlled during the...
point cloud
A point cloud is a set of data points in a three-dimensional coordinate system, where each point represents a specific...
semiconductor
A semiconductor is a type of material that has electrical conductivity between that of a conductor and an insulator. In...
volumetric imaging
Volumetric imaging refers to the capture, visualization, and analysis of three-dimensional (3D) information from a volume of...
atomic clock
An atomic clock is a highly precise timekeeping device that uses the vibrations or oscillations of atoms as a reference for...
embedded vision
Embedded vision refers to the integration of computer vision technologies into various embedded systems, devices, or...
beam position
In computer graphics, the point on the display screen where the electron beam is located before the display instruction is...
image enhancing equipment
Complex devices, often involving a computer, in which a photograph is scanned by a point of light, the amplitude of the...
whole slide imaging
Whole slide imaging (WSI), also known as virtual slide microscopy or digital pathology, is a technology that involves the...
coded aperture imaging
An imaging process in which the single opening of a simple pinhole camera is replaced with many openings called,...
fractals
A method used to generate graphics within a computer system. Rather than dots or lines, fractal graphics work with...
central processing unit
The computer module whose circuitry interprets instructions and guides the actions of the peripherals. Also known as the...
machine learning
Machine learning (ML) is a subset of artificial intelligence (AI) that focuses on the development of algorithms and...
computer-integrated manufacturing
The use of computer systems for monitoring and controlling industrial production.
photoelectric counter
A device used to count objects that pass a given point by allowing each object to obstruct a beam of light falling on a...
diamond turning
Diamond turning, also known as diamond machining or diamond cutting, is a precision machining process used to produce...
image definition area
In computer graphics, the coordinated two-dimensional or three-dimensional area of increased resolution where graphics...
fan-in
The simultaneous collection of two or more signals at a single location. In a digital computer, it refers to the number of...
data analysis display
An accurate cathode-ray tube display used to provide visual representation stored in a computer for the interpretation and...
machine vision
Machine vision, also known as computer vision or computer sight, refers to the technology that enables machines, typically...

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