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mount Dictionary Terms

immersed detector
A radiation detector with its active medium mounted within a lens that focuses the radiation signal. The improvement in...
optical lever
A device used to detect and measure small amounts of rotation. The rotating object contains a reflecting surface from which...
phosphor
A chemical substance that exhibits fluorescence when excited by ultraviolet radiation, x-rays or an electron beam. The...
interchangeable lens
A lens that has a mount, usually bayonet or screw type in design, that can be used on a camera in place of lenses with the...
fiber curl
A property of optical fiber that results from thermal stresses during manufacturing and is defined as the amount of...
lock-in amplifier
A lock-in amplifier is a specialized electronic instrument used to extract and measure small signals embedded in noise or...
fluence
Fluence is a term used in various scientific and technical disciplines to describe the amount of something per unit area....
excitation potential
The amount of energy required to raise the energy level of an atom; a necessity if the atom is to radiate energy. High...
probe card
A probe card is a testing device used in the semiconductor manufacturing industry to evaluate and test the electrical...
mirror mount
A mirror mount is a mechanical device used to secure and precisely position mirrors in optical systems. Mirrors are...
copying camera
A camera mounted on an optical bench with an easel to hold the material to be copied. Magnification can be varied over a...
solar constant of radiation
Solar radiation intensity existing in free space at the mean solar distance of the Earth. Commonly expressed in g cal...
parfocal eyepiece
One eyepiece of a set having equal distances from their mounting interface to their image plane, permitting freedom to...
internal surface
A nonoptical surface, within lenses and lens mounts, that contributes largely to flare by reflecting light into the image...
centering
1. Mounting a lens or mirror so that its optical axis is coincident with the optical or mechanical axes of other portions of...
panoramic camera
A camera designed to form a continuous record of an expansive section of the horizon. The typical panoramic camera is...
pincushion distortion
An aberration of a lens system caused by an increase in lens focal length as the field angle increases. The amount of...
APD detector
An APD detector, or avalanche photodiode detector, is a type of photodetector used to detect light or optical signals by...
telescope mount
The base used to hold an astronomical telescope. It may be either altazimuth, with horizontal and vertical axes of rotation,...
deflection under static load
For an optical table, the amount of displacement that occurs when a heavy load is placed or moved on the surface. To measure...
central obstruction
In a reflecting telescope, the obstruction of the primary mirror by a secondary mirror which blocks a small amount of the...
photoconductive film
A film of material that exhibits varying conductivity based upon its absorption of varying amounts of photon radiation.
Photoelastic equipment and supplies
Photoelastic equipment and supplies refer to instruments and materials used in photoelasticity, a technique used to analyze...
phosphorography
A process used in pyrometry and photothermometry to create a photographic record of a surface's temperature gradients....
optical fluorography
The fluorographic method whereby the visible image (as opposed to the x-ray image) is photographed by mounting a camera in...
external photoelectric effect
The ejection of electrons from the surface of a solid by the absorption of a sufficient amount of photons.
digital video compression
A step-by-step method of reducing the amount of data in a digital video signal to transmit or store a high-quality image....
compound shutter
A center-opening shutter made up of several identical leaves that are mounted symmetrically around the optical axis of the...
reflected light meter
An exposure meter that indicates the amount of light reflected from the subject of interest.
impurity level
In the context of optical materials, the term "impurity level" refers to the presence of foreign atoms or molecules within...
sputtering equipment
Sputtering equipment is machinery used in the process of physical vapor deposition (PVD), specifically sputtering....
optical caliper
A device for measuring linear dimensions. The optical caliper generally consists of two circularly mounted mirrors whose...
halogen lamp
A halogen lamp, also known as a tungsten halogen, quartz-halogen, or quartz iodine lamp, is an incandescent lamp that uses a...
internal photoelectric effect
The creation of free electrons within a solid by the absorption of a sufficient amount of photons. The effect produces an...
Wadsworth mounting
A system used for gratings that consists of a concave mirror, a grating and a plate holder mounted normal to the grating to...
microtome
A device used for slicing very thin specimens in preparation for mounting on a microscope slide.
microfluidics
Microfluidics is a multidisciplinary field that involves the manipulation and control of very small fluid volumes, typically...
liquid crystal on silicon
Liquid crystal on silicon (LCoS) is a display technology that combines liquid crystal materials with silicon-based...
quantum confinement
Quantum confinement refers to the phenomenon in quantum mechanics where the motion of charge carriers, such as electrons or...
quantum
The term quantum refers to the fundamental unit or discrete amount of a physical quantity involved in interactions at the...
air dose
A quantitative measure of the amount of radiation given off by an instrument, expressed in roentgens per unit of free air.
loss budget
The total optical power loss in a system. The loss budget is often stated in terms of the transmitted power and the power...
aerial photography
Photographing of terrain on the ground and objects in the air by cameras mounted in aircraft; utilized in satellites,...
equivalency width
Calculation of the amount of energy extracted from a light beam regardless of its wide range resolution.
beam profiler
A device that measures the spatial distribution of energy perpendicular to the propagation path of a radiant beam. An energy...
infrared lens
An infrared lens is an optical component specifically designed and optimized for transmitting, focusing, or manipulating...
antireflection coating
An antireflection coating (AR coating) is a thin film or coating applied to optical surfaces, such as lenses or windows, to...
prism binoculars
A pair of telescopes with prismatically erected images, mounted side by side with the eyepieces at the interocular distance...
selective transmission
Transmission in different amounts as a function of wavelength, as a result of absorption and scattering, leading to color...
spectrophotometer
A spectrophotometer is a scientific instrument used to measure the intensity of light at various wavelengths in the...
photodetector
A photodetector, also known as a photosensor or photodiode, is a device that detects and converts light into an electrical...
heat lamp
A lamp designed to emit a large amount of infrared radiation; used in applications requiring heat.
optical figure
The amount by which an optical surface deviates from its ideal design value, expressed in wavelengths of light. Optical...
solenoid
In micropositioning, a remote positioning device in which an electric current drives a movable armature mounted on an...
counting chamber
In microscopy, the chamber that is contained on a microscope slide to hold a certain amount of fluid. It is calibrated...
thermoelectric cooling
A refrigeration method based on the Peltier effect. When an electric current passes through a thermocouple of two dissimilar...
petrographic specimen preparation
The grinding and polishing of rock samples, to a thickness of less than 0.05 mm, for study with petrographic microscopes....
standard lens
A lens whose focal length is roughly equal to the diagonal of the negative format of the camera on which it is mounted.
cathodoluminescence
Light produced when a metal is bombarded with high-velocity electrons causing small amounts of the metal to vaporize and...
selective reflection
The reflection in different amounts as a function of wavelength, as a result of absorption and scattering, leading to color...
gyroscope
A gyroscope is a mechanical device consisting of a spinning disk or wheel mounted on a spinning axis in such a way that its...
radiation-monitoring film
The film used in photographic dosimetry to record the types and amounts of ionizing radiation, such as x-rays and gamma...
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...
cathetometer
A type of comparator with a telescope equipped with a cross wire mounted on a vertical sliding column. It is used to measure...
electromodulation spectroscopy
A type of modulation spectroscopy that measures spectral reflectance or transmittance changes induced by applying a...
optical assembly
An optical assembly refers to a collection of optical components that are carefully arranged and aligned to perform a...
dwell time
For a detector, the amount of time alotted for the observation of one location.
Bunsen-Roscoe law
The law stating that the amount of chemical change produced is proportional to the amount of light absorbed. Actually, the...
Rowland mounting
The mounting of a concave diffraction grating and a plate holder at the ends of a rigid bar. The ends follow separate...
image enhancement
The digitization process by which an image is manipulated to increase the amount of information perceivable by the human eye.
photoelectric scanner
A system mounted a few inches above a moving plane that consists of a light source, lenses and one or more phototubes. In...
near-infrared camera
A near-infrared (NIR) camera is an imaging device designed to capture images in the near-infrared region of the...
high-content screening
Also known as HCS, an analytical method designed to collect statistically relevant amounts of quantitative data on many...
hydrogel
A hydrogel is a three-dimensional network of polymer chains that are hydrophilic, meaning they have a strong affinity for...
trial sets (ophthalmic)
Sets of lenses (positive, negative and cylindrical) usually mounted in circular rims suitable for slipping into trial...
Knoop hardness
A measurement of the hardness of a material as determined by the penetration depth of a diamond stylus under a specified...
dispersion
Dispersion refers to the phenomenon where different wavelengths (colors) of light travel at different speeds when passing...
ionization potential
The amount of energy required for a particular kind of atom to remove an electron to infinite distance. The ionization...
optical work
The degree to which the surface of a lens causes an incident ray of light to bend, or the amount of convergence or...
Schumann plate
A specific type of photographic plate designed with only a small amount of gelatin to function in the extreme ultraviolet...
proximity-focused image tube
A planar photocathode and a planar phosphor screen mounted in a close-spaced parallel configuration in an evacuated...
luminous flux
Descriptive of the radiant power of visible light modified by the eye response. It is the measure of the flow of visible...
charge-coupled device
A charge-coupled device (CCD) is a type of electronic image sensor used in various imaging devices, including digital...
Weissenberg method
The Weissenberg method, named after the German physicist Karl Weissenberg, is a technique used in x-ray crystallography for...
Rayleigh scattering
Rayleigh scattering is a phenomenon that occurs when light waves interact with particles or molecules that are much smaller...
MEMS fiber optic switch
A MEMS fiber optic switch is a microelectromechanical system (MEMS) device designed to selectively route optical signals...
optical table
An optical table, also known as an optical bench or an optical breadboard, is a specialized platform used in optics...
bayonet coupling
A coupling mechanism designed to quickly lock a connector into an adaptor or a lens into a lens mount. Typically coupling is...
microdisplay
A microdisplay is a miniature electronic display technology that is designed to project visual information onto a small...
dispersion-shifted fiber
A dispersion-shifted fiber (DSF) refers to a type of optical fiber designed to minimize the effects of chromatic dispersion,...
sapphire optical fiber
Sapphire optical fiber is a type of optical fiber made from single-crystal sapphire, which is a form of aluminum oxide...
Risley prism
A Risley prism, also known as a Risley prism pair or Risley rotating prism, is an optical device used for controlling the...
optical constructor
A system of modular mechanical components for building precision optical systems. The basic equipment includes a variety of...
perovskite
The term perovskite refers to a specific crystal structure commonly found in various materials. Perovskite structures have a...
image dissector tube
An electron tube that is used as a camera tube for a television system. When the picture to be transmitted is focused on a...
photoconductive effect
The alteration of electric conductivity produced by the absorption of varying amounts of radiation composed of photons.
time constant
The amount of time needed for a detector signal or electronic circuit to reach 63 percent of its final value after a fixed...
stabilizing platform
A platform mount used to hold sensitive optical instruments immobile.
helmet-mounted display
A compact optical projection system, mounted on or built into a helmet, and used to project data or a scene directly into...
noise equivalent irradiance
The amount of spatial noise detected equivalent to the output emission location of the giving source.
telepresence
The use of head-mounted displays and body-operated remote actuators to control distant machinery. Provides a virtual...
bolometer
A thermometric instrument used for the detection and measurement of radiant energy. Its essential component is a short...
footprint
1. The sector of the Earth's surface registered upon a remote sensing device in a satellite. 2. The amount of space occupied...
transmission efficiency
Measure of the amount of light that is transmitted, relative to the amount lost by absorption or reflection.
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...
stick machine
A polishing machine with a lens mounted on a wooden stick, allowing a very wide sweep. It is used to polish hemispherical or...
photomicrography
The use of a microscope in photographing objects. A device for photomicrography includes a light source, microscope and...
kinematic mount
A mount for an optic element or optics assembly, designed so that all six degrees of freedom are singly constrained. This...
linear positioning stage
A linear positioning stage, also known as a linear stage or translation stage, is a precision mechanical device used to...
free-space optics
Free-space optics (FSO), also known as optical wireless communication or optical wireless networking, refers to the...
inertial fusion energy
Inertial fusion energy (IFE) refers to a proposed method of generating electricity by harnessing the energy released from...
pixel binning
Pixel binning, also known as pixel merging or pixel combining, is a technique used in digital imaging and camera technology....
plastic lens
A lens made from transparent plastic material. Lenses over 31/2 in. in diameter are usually machined, ground and polished....
photographic dosimetry
The use of photographic emulsions to detect and determine the amounts of ionizing radiation, such as x-rays and gamma rays,...
optical fiber
Optical fiber is a thin, flexible, transparent strand or filament made of glass or plastic used for transmitting light...
shutter
A mechanical or electronic device used to control the amount of time that a light-sensitive material is exposed to radiation.
Wollaston prism
A polarizing prism consisting of two calcite prisms cemented such that they deviate the two emerging beams (which are...
Paschen-Runge mounting
A mounting used for large concave gratings, whereby the slit, grating and plate holder lie in the Rowland circle, and the...
eccentric mounting
A lens mounting with eccentric rings that may be rotated to shift the axis of the lens to a prescribed position.
centerburst
In an interferogram, an intense portion of the recording that corresponds in size to the amount of infrared radiation...
alidade
An old name for the rotating arm moving about an axis of rotation over a divided circle used to measure angles. Now the term...
machine vision lens
A machine vision lens is a specialized optical lens designed for use in machine vision systems, which are used for automated...
nuclear fusion
In physics, nuclear fusion refers to the process in which two atomic nuclei come together to form a heavier nucleus,...
reflecting galvanometer
A galvanometer having a small mirror that is mounted on a moving element and that reflects a light beam onto a scale.
rotating wedge
A circular optical wedge (prism of small refracting angle) mounted to be rotated in the path of light rays to divert the...
excitation volume
The amount of x-rays used to penetrate and diffuse a target sample undergoing electron-probe microanalysis.
Dobson spectrophotometer
A spectrophotometer that measures the amount of ozone in the atmosphere through a comparison of solar energy at two...
prism
A prism is a geometric optical element with flat, polished surfaces that refract light. It is typically a solid, transparent...
virtual reality
Virtual reality (VR) is a computer-generated simulation of a three-dimensional environment or experience that can be...
heliostat
A device having a plane mirror so mounted that it can be set to reflect sunlight into a piece of laboratory equipment. It is...
chromatic aberration
Chromatic aberration is an optical phenomenon that occurs when different wavelengths (colors) of light are refracted by a...
relative brightness
A figure of merit corresponding to the amount of light seen by a viewer through binoculars. A higher number indicates a...
reflection reduction coating
The thin, transparent film made up of specific substances applied to glass-air surfaces for the purpose of decreasing the...
air bearing
A support device in which a column or chamber of air permits the free travel of a mobile part. In optical mounting and...
surveyor's level
A small telescope mounted on a tripod and free to rotate about a vertical axis. A spirit level is mounted over the telescope...
backlight compensation
The ability of a camera to compensate in cases where a subject with a large amount of background light would otherwise be...
galvanometric scanner
A galvanometric scanner, also known as a galvanometer scanner or galvo scanner, is a type of optical scanning device used to...
atomic absorption spectrometer
An atomic absorption spectrometer (AAS) is an analytical instrument used to determine the concentration of specific chemical...
principal axis
A straight line connecting the curvature centers of the refracting lens surfaces. In a mechanical sense, a line joining the...
neutral density coating
A coating applied to a neutral density glass that is designed to reduce the amount of light evenly across the transmitted...
baseline
The smallest amount of photon energy to pass a detector window and be counted.
momentum transfer
In physics, momentum transfer is the amount of momentum transferred from one particle to another during particle collision...
transmission
In optics, the conduction of radiant energy through a medium. Often denotes the percentage of energy passing through an...
photoplethysmography
Photoplethysmography (PPG) is a non-invasive optical technique used to detect changes in blood volume in tissues. It...
flange focal distance
The distance between the locating surface of the lens mount and the image plane.
internet of things
The internet of things (IoT) refers to a network of interconnected physical devices, vehicles, appliances, and other objects...
gray scales
Transparencies that represent progressive steps in the amount of transmitted radiation for administering predetermined...
colorimeter
A colorimeter is a device used to measure and quantify the color characteristics of an object or a light source. It provides...
rear facet monitor
A photodetector mounted in the same package as a laser diode that is positioned to monitor the output from the rear facet of...
integrated Dewar cooler assembly
An infrared detector mounted directly on the cold finger of the Dewar cooler rather than at the interface of Dewar and...
polariscope
A combination of a polarizer and an analyzer that is used to detect birefringence or rotation of the plane of polarization...
fiber optic spectrometer
A fiber optic spectrometer is a device used for measuring the spectral content of light. It utilizes optical fibers to...
iris diaphragm
A mechanical device designed to smoothly vary the effective diameter of a lens, thereby controlling the amount of light...
split lens
A close-up lens, semicircular in shape, that is mounted in front of a conventional lens focused at infinity. The result is...
optical coatings
Optical coatings are thin layers of materials applied to optical components, such as lenses, mirrors, filters, and prisms,...
double-raster format
A mode of laser printing in which each pixel is printed four times, providing sharper lines and a continuous tone from...
C-mount
A standard lens interface initially made for 16mm movie cameras and now used primarily on closed-circuit television cameras....
arc flash
An arc flash is a sudden release of electrical energy due to an electric arc — a continuous, high-current discharge of...
phase annulus
A term for the ring-shaped stop in a phase contrast microscope. The phase annulus limits the amount of light that reaches...
Judas optics
A small defocused Galilean telescope mounted in a hole in a door. Viewed from inside through the positive lens, a wide-angle...
sleeve mount
 four-wave mixing
A phenomenon that occurs in WDM and DWDM systems when three closely spaced signal wavelengths near the zero-dispersion...
solar battery
A series of solar cells arranged to collect solar radiation and to generate a given amount of electrical energy.
coelostat
A plane mirror mounted on a polar axis that lies parallel to the plane of the mirror. When the mirror is rotated once in 48...
einstein
A unit of energy equal to the amount of energy absorbed by one molecule of material undergoing a photochemical reaction, as...
motion controller
In optics, a motion controller refers to a device or system that precisely controls the movement of optical components, such...
thermography
Thermography is a technique that involves the use of an infrared imaging device, called a thermal camera or infrared camera,...
packet
The finite amount of electrical charge generated in response to incident radiation and transferred from one storage element...
deep learning
Deep learning is a subset of machine learning that involves the use of artificial neural networks to model and solve complex...
altazimuth
A type of telescope mount that permits direct azimuth and elevation adjustments.
equatorial mount
A telescope stand equipped with a polar axis that can be set parallel to the Earth's axis of rotation and a declination axis...
optical combiner
An optical combiner, in the context of optics and display technologies, refers to a device or component that combines...
fata morgana
A type of mirage that creates a distorted vertical image of relatively flat objects so that they appear as mountains,...
inertial confinement fusion
Inertial confinement fusion (ICF) is a method of achieving nuclear fusion, a process where two atomic nuclei combine to...
proof strength
The minimum amount of strength characteristic of an optical fiber, as determined by proof stressing; expressed in thousands...
Golay cell
A thermal radiation detector consisting of a small cell with a blackened plastic front face that bulges slightly when heat...
measuring wedge
A wedge in a rangefinder or heightfinder used to displace the image produced by one telescope so that it coincides with that...
infrared alarm system
A system that uses infrared detectors and related instrumentation to determine when abnormal amounts of infrared radiation,...
blocking tool
An instrument used to support optical parts to be cemented, or to be mounted in plaster.
glass
A noncrystalline, inorganic mixture of various metallic oxides fused by heating with glassifiers such as silica, or boric or...
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...
Abbe constant
A dispersion relation defined in order to value the reciprocal amount of dispersion. It is defined as the refractivity over...
optical waveguide termination
A configuration or device mounted at the end of a fiber or cable that is intended to prevent reflection.
mounting cement
An adhesive used to hold optical components in their mounts. It may be a thermoplastic or chemical-hardening substance.
x-plates
Two flat parallel electrodes that are vertically mounted alongside each other in a cathode-ray tube and produce horizontal...
entrance slit
The entrance slit, also known simply as the slit, is an essential component in optical instruments such as spectrometers and...
lens mount
The metal tube that maintains the optical components of a lens in proper relationship. Some lenses are mounted in metal...
neuromorphic
Neuromorphic refers to the design and development of computing systems or devices that are inspired by the structure and...
spiral scanning
A scanning process in which the greatest amount of radiation determines part of a spiral motion rotating in one direction.
traveling microscope
A measuring instrument composed of a microscope and reticle, and mounted on a calibrated slide mechanism. May be used...
polymerase chain reaction
The polymerase chain reaction (PCR) is a widely used molecular biology technique used to amplify a specific segment of DNA...
absorption meter
A measuring device that uses a light-sensitive cell or detector to determine the amount of light transmitted by a substance.
optical manufacturing tools and machinery
Optical manufacturing tools and machinery encompass a wide range of equipment, instruments, and systems used in the...
fusion ignition
Fusion ignition refers to the point in a controlled nuclear fusion reaction where the energy released by the fusion...
sputtering target
A sputtering target is a solid material used in the process of physical vapor deposition (PVD), specifically sputtering....
flare
Nonimage-forming light, concentrated or diffuse, that is transmitted through the lens to the image. It is frequently the...
spectrophone technique
Gas detection measurement technique that uses a built-in capacitative microphone to calculate the amount of absorbed laser...
lumen
A lumen is a unit of measurement used to quantify the amount of luminous flux, which is the perceived power of light. In...
gyroscopic camera mount
A mount that uses a floating suspension and a motor-driven gyroscope to keep a motion picture or still camera at a set angle...
accessory shoe
Mount attached to a camera or camcorder which allows the user to attach a microphone or flash unit.
impedance
Qualitatively, the inverse of the amount of velocity produced by the application of a sinusoidal force to a system;...
laser anemometry
The process by which laser emission is used in measuring fluid velocity and, more specifically, the detection of air and...
bench photometer
A device used to compare the luminous intensities of two sources by locating a point between the two light sources where the...
photoconductivity
The conductivity increase exhibited by some nonmetallic materials, resulting from the free carriers generated when photon...
scattered light filter
A specific type of filter designed to reduce the amount of light scattered by reflections from the edges of optical...
radio-frequency discharge laser
A gas laser in which the electrodes are mounted perpendicular to the optical resonator.
Bragg's law
The law expressing the condition under which a crystal will reflect a beam of x-rays with the greatest amount of distinction...
Fresnel reflection
Fresnel reflection refers to the reflection of light at the interface between two different media with different refractive...
equatorial telescope
A telescope that is mounted on an equatorial mount.
injection-mounted assembly
A process by which a plastic cell is molded around a glass lens or lenses to create a mount, eliminating the metal barrel...
stacked-diode laser
A type of laser used when a great amount of power is required. Avoiding the bulk of large numbers of optical lenses, this...
filament transformer
A transformer that is designed to regulate the amount of current that passes through an electron tube's filament.
electrocapillarity modulator
A type of optical modulator with potential application in optical switching and displays, in which applied voltage causes a...
luminous energy
A measure of the time-integrated amount of flux. It has units of lumen-seconds and might be used to describe such things as...
occluder
A device that completely or partially restricts the amount of light reaching the eye.
radio telescope
An instrument designed to collect naturally formed extraterrestrial electromagnetic radiation within the radio frequency...
mount
See gimbal mount; kinematic mount; lens mount.
piezo-optical transducer
A structure consisting of a thin film of liquid crystal sandwiched between light-polarizing filters that have received a...
surface-enhanced Raman spectroscopy
Surface-enhanced Raman spectroscopy (SERS) is an analytical technique that combines the principles of Raman spectroscopy...
chemical actinometer
A light-sensitive detector having a chemical compound that reacts when exposed to light. It is used in photochemistry and...
whole slide imaging
Whole slide imaging (WSI), also known as virtual slide microscopy or digital pathology, is a technology that involves the...
laser diode module
A laser diode module is a compact device that incorporates a laser diode, optics, and often other components into a single...
microchannel spatial light modulator
A device to modulate spatially a collimated coherent beam of light with input data in optical data processing. It uses a...
lateral shearing interferometer
A lateral shearing interferometer is an optical device used in interferometry to measure phase differences between two beams...
beam shuttle
A set of mirrors mounted on solenoids to move them into and out of the path of a laser beam, making it possible for multiple...
photoelectric emission
The electron emission from a substance or instrument whose surface has been bombarded by a suitable amount of radiation.
enzyme-linked immunosorbent assay
An enzyme-linked immunosorbent assay (ELISA) is a laboratory technique used to detect and measure the presence of specific...
chroma
1. Attribute of a visual sensation that permits a judgment to be made of the amount of pure chromatic color present. 2. The...
photoelectric constant
The constant that, multiplied by the frequency of the radiation-producing emission of photoelectrons, determines the amount...
crystal grating
A crystal that may serve as a diffraction grating if mounted effectively.
magenta
The reddish/purple color that results when equal amounts of blue and red are combined so that no one wavelength dominates.
diffuse sensing mode
Use of a photoelectric receiver to sense an object's presence by detecting a small amount of the emitter's light that is...
diopter scale
A scale located on the eyepiece focusing screw and used to measure the amount of defocusing of the eyepiece in diopters. The...
gimbal mount
An optical mounting device that permits adjustment around two perpendicular and intersecting axes of rotation.

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