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5,268 terms
Photonics Dictionary
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lamellar grating
A grating with ridges of rectangular cross section, generally equal in width to the space between. This type of grating may be used as a beam divider.
lamp
->
light source
The generic term applied to all sources of visible radiation from burning matter to ionized vapors and lasers, regardless of the degree of excitation.
land
In a CD-ROM disc, the reflective area between nonreflective pits representing a binary-language "off'' as opposed to the "on'' signals of the land-to-pit and pit-to-land transitions.
landolt ring
A broken circle used as the test object in distinguishing visual acuity. The width of the gap in the circle is equal to the breadth of the black line and one-fifth the circle diameter. Also known as...
LANTIRN
low-altitude navigation and targeting infrared at night
lap
A metal tool used to grind lenses with loose abrasive (see diamond cutting tool). The functional surface of the lap is carefully formed to be opposite the curve to be produced on the glass (concave...
laparoscope
An endoscopic surgical instrument that includes a channel for the introduction of supplementary instruments.
Laplacian edge enhancement
Edge enhancement technique that accentuates all edge details in an image without discriminating as to spatial orientation.
lapping and polishing services
Lapping and polishing services involve specialized processes used to improve the surface finish and dimensional accuracy of components to meet specific requirements or standards. These services are...
LARES
laser ablation from rapidly exchanged sources
LARIAT
laser radar intelligence acquisition technology
LAS
laser absorption spectrometer; light-activated switch; local alignment system
LASAT
laser shock adhesion test
laser
light amplification by stimulated emission of radiation
laser ablation
Laser ablation is a process that involves the removal or erosion of material from a target surface using laser energy. This technique is widely used in various scientific, industrial, and medical...
laser absorption spectroscopy
An experimental research technique by which absorbed or unabsorbed radiation is analyzed in order to characterize and determine material properties, concentration as well as behavior under the...
laser active elements
Laser active elements typically refers to the substances or materials within a laser system that play a critical role in the amplification of light through the process of stimulated emission. These...
laser anemometry
The process by which laser emission is used in measuring fluid velocity and, more specifically, the detection of air and wind velocity.The laser technique measures the amount of frequency shift...
laser annealing
Laser annealing is a process that involves using a laser beam to heat and modify the microstructure of a material, typically a thin film or surface layer, with the objective of improving its...
laser biostimulation
->
biostimulation
The action of a biological system responding to a single or multiple coherent particles of light produced from a laser source. Examples of laser biostimulation include: retinal interaction of light...
laser cavity
A laser cavity, also known as an optical cavity or resonator, is a fundamental component of a laser system. It is a confined region or space where light undergoes multiple reflections, leading to the...
laser ceilometer
A device used for measuring the height of clouds from a position on the ground. Measurement technique uses a vertically directed beam stably positioned such that scattered radiation may be detected...
laser cell sorting
A moving group of fluid-suspended biological species directed through separate channels by which the population is isolated. The isolated or purified group is observed by applying a laser detection...
laser cloud mapper
A scanning laser radar system applied to transmission and concentration analysis in three dimensions of clouds as well as aerosols and other particles within atmospheric systems.
laser contact tip
A surgical device used to deliver laser light. Specifically,contact tips are made with artificially grown sapphire which is precisely cut to an orientation which permits efficient light transmission....
laser controlled area
Area in which laser operation occurs and therefore safety requirements are met and regulations are implemented. Lasers operated within a laser controlled area may vary with energy and wavelength.
laser cooling
Laser cooling is a technique used to reduce the temperature of a material or a collection of atoms or molecules by using laser light. It is based on the principle of selective absorption and emission...
laser crystal
A laser crystal, also known as an active medium or gain medium, is a solid-state material used in the construction of lasers. The primary function of the laser crystal is to amplify light by...
laser damage
A natural or mechanical system adversely affected by the influence of laser radiation. During laser damage the common effect of the radiation on the surface of interest is heat accumulation due to...
laser damage threshold
The laser damage threshold refers to the maximum level of laser intensity that a material can withstand without experiencing damage. It is a critical parameter in laser applications and is...
laser dazzle system
Visible laser radiation, often optically expanded and collimated, used to induced temporary blindness from within a walking distance of an impending target. Laser dazzle systems may be in a handheld...
laser designator
A laser device used to establish a location or target usually for detection by an impact source e.g. missiles and guided munitions. Laser designation sources utilize a system configuration which is...
laser desorption
A process of forming ions within a given molecular species by incident laser light. The molecular species may remain intact, without fragmentation, during soft desorption whereas molecular samples...
laser detector
Device that operates by interaction of incident radiation with semiconductor based material in order to produce an electrical signal or by other means, to interact with calorimetric devices which...
laser diode
->
diode laser
A diode laser is a type of laser that uses a semiconductor diode as the active medium to generate coherent light. Semiconductor diodes are electronic devices that conduct electricity primarily in one...
laser diode array
A group of single emitter laser diodes, usually arranged vertically or horizontally with respect to each other. The power output of the array increases in direct proportion to the number of single...
laser diode module
A laser diode module is a compact device that incorporates a laser diode, optics, and often other components into a single package. These modules are designed to provide a convenient and efficient...
laser Doppler velocimeter
Device which determines particle velocity through the measurement of scattered interference of a beam pair from a single source. The measured light is Doppler shifted which provides information...
laser drift
Laser drift typically refers to a phenomenon where the frequency or wavelength of a laser source gradually changes over time. In the context of lasers, stability in terms of frequency or wavelength...
laser drill
High power laser ablation device that by pulsed operation produces holes of controllable dimension on the scale of microns. Laser drill applications include turbine manufacturing and surface metal...
laser dye
Class of organic dyes that emit coherent radiation over a wide spectral range.
laser eyewear
Usually consists of a set of filters that attenuate specific wavelengths but transmit as much visible radiation as possible.
laser fusion
Optical confinement of matter with high field energies intended to induce a stable nuclear fusion interaction.
laser gravimeter
Means of determining the relative motion of a (seismic) mass or acceleration body from a stable laser operated system.
laser guide star
An artificial star used to aid in adaptive optics imaging of the sky. The guide star is provided from a telescope system on the ground and is directed into the imaged region. The wavefront...
laser gyroscope
Counter propagating beams imaged along the same path in order to detect rotation. Precise rotation is measured through variation of the interference patterns which oscillates external to the standing...
laser hammering
Means of correcting laser postweld shift. The correction procedure is applied to optoelectronic systems such as laser diode butterfly modules.
laser irradiation
Laser irradiation is a process that involves the use of focused laser beams to deliver energy to specific areas for medical, industrial, or scientific purposes. The laser (light amplification by...
laser isotope separation
A process of isolation of various atom vapor ions by means of tuning a laser source. For example, laser enrichment is applied to isolate uranium; enrichment is utilized in chemical vapor applications...
laser kiss cutting
Laser kiss cutting is a technique used in manufacturing and fabrication processes, particularly in industries like packaging, textiles, and electronics. Laser kiss cutting involves using a laser...
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Photonics Dictionary
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