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Cree Dictionary Terms

tetrode
An electron tube that has an anode, a cathode, a control electrode and another electrode (usually a screen grid).
graphene
Graphene is a two-dimensional allotrope of carbon consisting of a single layer of carbon atoms arranged in a hexagonal...
target
1. The anode or anticathode of an x-ray tube that emits x-rays when bombarded by electrons. 2. The screen in a television...
tracking
1. The process of following an object's movement; accomplished by focusing a radar beam on the reticle of an optical system...
oleophobic
Oleophobic is a term used to describe substances or materials that repel or resist oils. The word oleophobic comes from the...
liquid crystal
Liquid crystals are a state of matter that exhibits properties intermediate between those of conventional liquids and solid...
semilenticular screen
A projection screen having vertical ribs or flutes set into a plastic surface.
lensometer
An ophthalmic instrument used to measure the magnitude and direction of the maximum and minimum powers of a spectacle lens,...
biprism interference
Light interference fringes that can be viewed on a screen near a biprism.
electron-beam film scanning
The method by which photographic film is scanned by an electron beam. One technique uses the uniform light of a television...
x-ray image intensifier
An image intensifier that consists of an evacuated tube with a large input phosphor screen at one end. The phosphor screen...
overscanning
In a cathode-ray tube, the deflection of the beam of the tube over an angle that surpasses the angle that subtends the...
panoramic lens
A lens system that is capable of producing a 360° image, or one that is very close to that. In recording, the image may...
video measuring gauge
A device that calibrates the size, position or distance of objects imaged on a video screen.
notch filter
Also referred to as a band-stop or band rejection filter; a notch filter is a filter that is designed to screen out a very...
matt
A term used to describe a nondirectionally diffusing surface that, when illuminated, appears equally bright from all angles....
virtual image
An image that is formed when rays emerging from an optical system are diverging from the optical axis. The virtual image is...
optical comparator
Typically used for the examination of manufactured or engineered parts, an optical gauging device, in which a backlight is...
electron power tube
An electron-beam tube with power-handling capability that is essentially based on controlled electron beams. Its control and...
aluminized cathode-ray tube
A cathode-ray tube having a screen that is coated on the back with a thin film of aluminum, which serves to intensify the...
display
The observable illustration of an image, scene or data on a screen such as a console or cathode-ray tube, seen as a graph,...
projection thermography
The measurement of surface temperature by a thermograph that forms a pattern of the heat radiated by the surface on a...
digital camera
A digital camera is a device that captures and records still images or video in digital format. Unlike traditional film...
image definition area
In computer graphics, the coordinated two-dimensional or three-dimensional area of increased resolution where graphics...
vertical-deflection electrodes
Two electrodes that shift the electron beam vertically on a cathode-ray tube screen using electrostatic deflection.
scintillation camera
A pinhole camera used to record a radioactive tracer's distribution in a subject by means of a scintillation counter or a...
lenticular screen
A rear or front projection screen composed of minute optical surfaces that introduce a spread to the light beam that...
digital radiography
Medical diagnostic (x-ray) imaging using laser printers to produce high-resolution digital hard copy instead of film exposed...
trace
In a cathode-ray tube, the visible line or lines formed on the screen by the deflection of the electron stream.
opaque projector
An opaque projector is a device used for enlarging and projecting images from opaque objects such as printed pages,...
backlit
Refers to a display or screen that is illuminated from behind; the light is transmitted as opposed to reflected.
computer-output microfilm system
A camera system capable of producing microfilm copies of computerized data presented on a screen.
diffuser
An optical diffuser is an optical component or material designed to scatter or diffuse light that passes through it. It is...
translucent screen
A screen composed of a sheet of diffusing plastic material that reveals excellent image detail for close viewing. It is...
standard thermal profile
In infrared imaging systems used for mass screening of printed circuit boards or other quality control applications, an...
diffusing screen
In printing, a translucent screen used with lenses to provide an even distribution of diffused light.
metascope
A sensing or image-forming detector that serves to convert infrared rays into visible signals for communication purposes....
pixel
A pixel, short for "picture element," is the smallest controllable element of a digital image or display. It is a...
proximity-focused image tube
A planar photocathode and a planar phosphor screen mounted in a close-spaced parallel configuration in an evacuated...
bit mapping
In computer graphics, the assignment of each pixel on a display screen to its own switch in the computer memory.
projection pointer
A device used to project a small area of light on a screen for indication.
function generator
A computer hardware unit that generates required functional information on the screen by controlling CRT beam movements or...
lenticular
An array or mosaic of optical surfaces. May be a number of lenses closely packed to form multiple images or many parallel...
shadow mask tube
A type of color-generating cathode-ray tube that uses a shadow mask, a thin perforated electrode, located close to the...
Bjerrum screen
In ophthalmic practice, an instrument that determines the boundaries of the field of view. It is composed of a 2-m square of...
field lens
1. A lens situated at or near the plane of an internal image to project the aperture of a previous objective or erector upon...
diascope
1. An optical device used for projection of enlarged images of transparencies or lantern slides on a screen. 2. A device...
image intensifier
An image intensifier, also known as an image intensification tube or image intensification device, is a specialized...
x-ray detector
One of various types of fluorescent screens used to detect x-ray radiation. Photographic film is mildly sensitive to x-rays,...
halftone screen
A plate containing a uniform pattern of transparent holes in an opaque background, the clear area being nearly equal to the...
image plane
A plane in which an image is formed. A real image formed by a positive lens would be visible upon a screen located in this...
flat panel display
An electronic display in which a flat screen is formed by an orthogonal array of display devices, such as electroluminescent...
skiatron
A system employing a dark trace tube in which the opacity of the screen is varied as a function of the power of the beam.
lens testing equipment
Lens testing equipment refers to a range of specialized tools and instruments used to evaluate the optical performance,...
image amplifier
An electro-optic system using, in general form, an evacuated glass envelope with a semitransparent photocathode at one end...
lenticular stereo photography
A type of stereoscopic photography in which a pair of lenses focuses a pair of images, relative to the positions of the two...
exciter filter
In ultraviolet and fluorescence photography, the term applied to the filter used in the photographic system and with the...
nonlinear optical processing
Derivative of the half-tone screen process involving the fabrication of a binary pulse-width modulated copy 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...
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.
ultrasonic imaging
The formation and display of three-dimensional images by ultrasonic energy. In one technique, the energy pulses from an...
raster unit
The vertical or horizontal distance between two addressable points on a display screen; indicates the basic resolution...
terahertz
Terahertz (THz) refers to a unit of frequency in the electromagnetic spectrum, denoting waves with frequencies between 0.1...
nonmonotonic cell
Used in halftone screens to change the fundamental sampled spatial frequency of the halftoned picture, as well as varying...
microfilm reader
A device used to view microfilmed documents where the image on film is projected, in magnified form, onto a rear projection...
cathode-ray tube pattern
The luminous trace formed on the cathode-ray tube screen by the motion of the electron beam.
cine fluorography
The application of a cine camera in recording the images on a fluorescent screen. When x-rays are used to produce the screen...
keystone distortion
A type of geometrical distortion that brings about a trapezoidal display of a nominally rectangular picture. Usually...
infrared photomicrography
Photographic recording that uses infrared radiation as the light source to form an image of a microscopic object and a...
real image
An image that is formed when rays emerging from an optical system all converge to a point on the optical axis. A real image...
shadowgraph
A method of demonstration or examination using a point source illumination without the use of any projection lens between...
scanning spot
The spot illuminated on a cathode-ray tube by the initial impact of the scanning ray and the screen.
image tube camera
A camera system in which the image formed on the fluorescent screen of an image converter tube in the system is recorded by...
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...
fluorographic camera
A camera with a very high aperture lens or mirror system for photographing x-ray fluorescent screen images, mainly to save...
aspect ratio
With respect to pictorial displays, the ratio of the width to the height. The television standard in the US is 4:3....
frame
1. To center an image or place it in any part of the television screen desired. Also applies to stills. 2. A single image of...
field ion microscope
An extremely powerful microscope that renders individual ionized atoms visible by using an electric field to propel the ions...
ophthalmology
Ophthalmology is a branch of medicine that focuses on the anatomy, physiology, and diseases of the eyes and visual system....
infrared automatic mass screening
A thermal infrared imaging procedure developed for quality control of printed circuit boards. The thermogram of each board...
simultaneous dual field of view
A passive infrared system that uses two line-of-sight telescopes to generate both narrow and wide field-of-view images of...
gain
Also known as amplification. 1. The increase in a signal that is transmitted from one point to another through an amplifier....
electron-beam recording
The recording of the information contained in a modulated electron beam onto photographic or silicon resin-coated materials....
pixel pitch
Pixel pitch refers to the distance between the centers of two adjacent pixels on a display screen or imaging sensor. It is...
fluorescent screen
A fluorescent screen refers to a phosphorescent or fluorescent-coated surface that emits visible light when exposed to other...
photometric equipment
Photocells of various kinds used to measure photometric quantities; i.e., intensity, luminance and illuminance. Meter...
analog stroke
An analog method of moving a cathode-ray tube beam across a display screen face, commonly used in high-performance vector...
optical fluorography
The fluorographic method whereby the visible image (as opposed to the x-ray image) is photographed by mounting a camera in...
thick-film deposition
Successive layering of resistive, dielectric and conductive inks on a substrate by a type of screening process.
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...
micro-LED
Micro-LED (micro-light-emitting diode) refers to a technology that involves the use of very small light-emitting diodes to...
sync
Abbreviation of "synchronization.'' In television, the timing signals used to drive the scanning process. Horizontal...
high-gain screen
A screen with a reflected or transmitted light beam that is confined to a much smaller bundle than was received by the...
electron image tube
A cathode-ray tube that increases the brightness or size of an image or forms a visible image from invisible radiation. The...
electron telescope
An instrument that serves to produce an enlarged electron image on a fluorescent screen by focusing an infrared image of a...
optical power spectrum
Also known as the Wiener spectrum or the noise power spectrum, the optical power spectrum is a fundamental quantity in...
zinc sulfide
A polycrystalline material that transmits in the infrared; it is used as a phosphor in x-ray and television screens.
character generator
Computer hardware or firmware that accesses character patterns stored in read-only memory and displays them at specific...
mask
1. A framelike structure that serves to restrict the viewing area of the screen when placed before a television picture...
organic light-emitting diode
An organic light-emitting diode (OLED) is a type of light-emitting diode (LED) technology that utilizes organic compounds to...
cathode-ray tube
A vacuum tube with an electron gun at one end and a fluorescent screen at the other. Electrons emitted from a heated...
read screen
The transparent component of an optical reader that transmits the image rays of the characters to be read.
phase screen
A phase screen, in the context of optics and wave optics, refers to a surface or medium that introduces a phase delay to an...
liquid crystal on silicon
Liquid crystal on silicon (LCoS) is a display technology that combines liquid crystal materials with silicon-based...
epidiascope
A device for projecting either opaque matter or transparent slides onto a screen.
hard copy
Text or images printed on paper or another tangible medium, as opposed to those viewed electronically on a cathode-ray-tube...
input/output
I/O stands for input/output. In computing, it refers to the communication between a computer system or program and its...
well plate
A well plate, also known as a microplate or microtiter plate, is a flat plate with multiple small wells or depressions...
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...
projecting core coupler
A device that couples a light source to an optical fiber by projecting an image of the source and the fiber core onto a...
fluoroscopic image intensifier
A form of image intensifier designed to amplify a weak fluoroscopic image. The image is received at an input phosphor...
microchannel plate
A microchannel plate (MCP) is a specialized electron multiplier device used in various applications such as particle...
flexible display
A flexible display refers to a type of electronic visual display that is designed to be bendable, foldable, or rollable,...
terahertz spectrometer
A terahertz spectrometer is a scientific instrument used to measure and analyze the properties of materials in the terahertz...
scanner
1. A device used to trace out an object and build up an image. One of the most common of these types is video scanning. The...
thick-film circuit
A microcircuit whose passive components consist of a ceramic-metal combination deposited on a given substrate by screening...
Fresnel diffraction
1. Also known as near-field diffraction. The field of radiation sent through an aperture in an absorbing screen at large...
aperture mask
Also known as a shadow mask, a perforated plate placed between the focusing and accelerating electrodes, and the tricolor...
Y-axis deflection
The vertical deflection of an image on a cathode-ray tube screen.
halation
1. In a cathode-ray tube, the glow surrounding a bright spot that appears on the fluorescent screen as the result of the...
focus control
1. A mechanism that permits the focusing of an optical system.2. A means of obtaining the sharpest image from a cathode-ray...
Mach-Zehnder interferometer
A Mach-Zehnder interferometer is an optical device used to measure the phase difference between two collimated beams of...
Babinet principle
The principle stating that two diffraction screens, one being exactly the negative of the other, will form the same...
screen
The large, usually flat surface onto which an image is projected for viewing. May be reflecting or transmitting (rear...
image retaining panel
A type of electroluminescent display that will record and maintain an irradiated image on its phosphor screen, provided a DC...
oriented lenticular screen
A lenticular screen having the lenticules tipped about 20° to compensate for off-normal projection.
field emission microscope
An image-forming instrument in which a strong electrostatic field causes cold emission of electrons from a sharply rounded...
lab-on-a-chip
A lab-on-a-chip (LOC) is a miniaturized device that integrates various laboratory functions and capabilities onto a single,...
whole slide imaging
Whole slide imaging (WSI), also known as virtual slide microscopy or digital pathology, is a technology that involves the...
mixed-signal oscilloscope
A mixed-signal oscilloscope (MSO) is a type of electronic test instrument that combines the capabilities of both a...
deflection focusing
The progressive defocusing of a cathode-ray tube display image that occurs when the deflected electron beam impinges on the...
rare-earth elements
Rare-earth elements (REEs) are a group of seventeen chemical elements found in the Earth's crust, characterized by their...
Bunsen screen
A photometer screen that contains a diaphragm of paper or parchment with a translucent central spot of oil or paraffin.
contour projector
An inspection device in which the profile of a mechanical part is projected onto a ground-glass screen at a precisely known...
television projection
A television display system in which the television signal is converted to an image that is projected onto either a front or...
electron-gun system
An electron-gun system is an assembly used to generate and control a focused beam of electrons. Electron guns find...
direct screen focusing
In a camera, the focusing of an image on the screen located at the camera's film plane. Once the image is in complete focus,...
fluorography
The photographic recording of a visible image formed by the impact of invisible radiation on a fluorescent screen.
overhead projector
A projector used to project transparencies. A horizontal 8 x 10-in. stage for writing or laying down preformed...
phosphor dots
Very small phosphor particles present on the screen of a picture tube.
oscilloscope
A system in which a supplied signal causes the deflection of the electron beam in a cathode-ray tube, thus forming a visible...
polysulfone resin
A thermoplastic, self-extinguishing polymer with excellent high-temperature, low-creep and arc resistance properties.
image converter
An electron tube that employs electromagnetic radiation to produce a visual replica of an image produced on its cathode....
interference inverter
A device, consisting of a diode activated by an interference pulse, that is designed to minimize the white spots on a...
kinescope
A cathode-ray tube that serves as a picture tube in a television receiver. The signal representing the picture intensity is...
high-content screening
Also known as HCS, an analytical method designed to collect statistically relevant amounts of quantitative data on many...
wafer tube
An image intensifier tube in which the photocathode and the output of the microchannel plate are proximity-focused on the...
microdisplay
A microdisplay is a miniature electronic display technology that is designed to project visual information onto a small...
contact fluorography
A fluorographic method whereby the sensitive photographic medium is pressed against a fluorescent screen to form a visible...
double-layer screen
A CRT screen on which two phosphors differing in color and persistence are deposited.
radiographic amplifier screen
A solid-state panel of the photoconductor-electroluminescent type. The photoconductive layer, sensitive to x-rays, is coated...
electron scanning
The deflection of a beam of electrons, at regular intervals, across a cathode-ray tube screen, according to a definite...
cineradiography
The photographic filming of the action of x-ray images recorded on a fluorescent screen by means of large lens apertures and...
fluorographic lens
A lens having an extremely high aperture and used in the recording of x-ray fluorescent screen images. It often is specially...
electron micrograph
The photographic recording of images produced by the electrons from an electron microscope. The electron beam carries the...
creep
The deformation of a material at high levels of stress, often associated with elevated temperatures.
microfluoroscope
A fluoroscope equipped with a magnified, fine-grained fluorescent screen to determine the fluorescence emitted by a...
horizontal blanking interval
In television, the period during which the electron beam is cut off while the raster returns from the right-hand side of the...
slide projector
An optical projection device designed to project positive color transparencies onto a screen for viewing.
beam position
In computer graphics, the point on the display screen where the electron beam is located before the display instruction is...
moiré pattern
The resulting interference pattern generated from moiré deflectometry, the moiré pattern is a pattern...
quality area
The region of the cathode-ray tube phosphor screen restricted by the tube and instrument specification.

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