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PET Dictionary Terms

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 repetitive pattern.
quasi-CW laser
A laser that generates a succession of pulses at a high enough repetition rate to appear continuous. The pump source is...
photon burst detection of fluorescence
A type of laser spectroscopy used to measure short-lived isotopes by observing sudden bursts of fluorescence resulting from...
petrographic specimen preparation
The grinding and polishing of rock samples, to a thickness of less than 0.05 mm, for study with petrographic microscopes....
stochastic optical reconstruction microscopy
Stochastic optical reconstruction microscopy (STORM) is a superresolution microscopy technique that enables imaging of...
femtosecond laser
A femtosecond laser is a type of laser that emits ultrashort pulses of light with durations on the order of femtoseconds,...
substrate
A substrate refers to a material or surface upon which another material or process is applied or deposited. In various...
Petzval surface
A paraboloidal surface on which the image is located when there is no astigmatism.
electrowetting display
An electrowetting display (EWD) is a type of electronic display technology that utilizes the principles of electrowetting to...
jitter
1. In relation to cathode-ray tube displays, errors in the signal's amplitude, phase or both that result in small, rapid...
metabolic imaging
Metabolic imaging refers to the visualization and quantification of metabolic processes within living organisms, tissues, or...
petrographic microscope
A microscope equipped with a polarizer, an analyzer and a Bertrand lens to focus on the upper focal plane of the objective....
frequency comb
A frequency comb is a precise and regular series of equally spaced spectral lines, or frequencies, that are generated with...
grinding and polishing machinery
Machinery used to grind and finish a component, such as a lens or prism, to a desired precision. Usually such machines carry...
longitudinal pumping
A dye laser cell configuration in which the dye flows in the direction of the axis of the laser, yielding symmetrical energy...
in vitro
In vitro is a Latin term that translates to "in glass." In scientific contexts, particularly in biology and medicine, it...
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...
spatial frequency
With a repetitive object such as a series of equispaced lines, the reciprocal of the line spacing in object or image,...
field repetition rate
The number of fields scanned per second in a television system. The US standard is 60. Also called field frequency.
lidar
Lidar, short for light detection and ranging, is a remote sensing technology that uses laser light to measure distances and...
duty cycle
Also duty factor, duty ratio. The product of the pulse duration and the pulse repetition frequency of a wave composed of...
pulse repetition frequency
Number of pulses emitted per unit of time by a pulsed laser.
repetitively pulsed laser
A pulsed laser that emits a recurring pulsed output. Frequency of the pulses emitted is known as pulsed recurrence frequency...
nonradiative transition
A nonradiative transition refers to a process in which an electron or an atom undergoes a change in its energy state without...
pulsed laser
A laser that emits energy in a series of short bursts or pulses and that remains inactive between each burst or pulse. The...
halogen lamp
A halogen lamp, also known as a tungsten halogen, quartz-halogen, or quartz iodine lamp, is an incandescent lamp that uses a...
modulation spectroscopy
A method of spectral analysis in which some property of the sample is varied and the corresponding change is measured. The...
volumetric imaging
Volumetric imaging refers to the capture, visualization, and analysis of three-dimensional (3D) information from a volume of...
oscilloscope
A system in which a supplied signal causes the deflection of the electron beam in a cathode-ray tube, thus forming a visible...
photobleaching
Photobleaching is a phenomenon in which the fluorescence of a fluorophore (a fluorescent molecule or dye) is permanently...
multimodality imaging
A technique that combines two or more imaging processes in order to minimize the disadvantages within each of the...
near-field scanning optical microscope
A scanning probe microscope that analyzes the surface of a specimen by recording the intensity of light as it is focused...
mode-locked lasers
Mode-locking is a technique used in lasers to produce ultrashort pulses of light with durations on the order of picoseconds,...
laser damage threshold
The laser damage threshold refers to the maximum level of laser intensity that a material can withstand without experiencing...
petrography
The study of and classification of rocks.
enzyme-linked immunosorbent assay
An enzyme-linked immunosorbent assay (ELISA) is a laboratory technique used to detect and measure the presence of specific...
peta
In the SI system, prefix meaning 1015.
silicon carbide light-emitting diodes
Silicon carbide (SiC) light-emitting diodes (LEDs) are semiconductor devices that emit light when an electric current is...
common optoelectronics laser detection system
A laser warning and countermeasure system containing a sensor that indicates the direction of a laser beam, and analytical...
transverse mode
In the context of optics and lasers, a transverse mode refers to a specific spatial pattern of the electric field within the...
boxcar averager
An instrument for detecting and analyzing repetitive signals. Using a fixed time delay or "gate," the input signal...
average power
In a pulsed laser, the pulse energy in joules times the repetition rate in hertz.
Seidel aberrations
Seidel aberrations refer to a set of monochromatic aberrations in optical systems, named after the German mathematician and...
extreme ultraviolet
Extreme ultraviolet (EUV) refers to a specific range of electromagnetic radiation in the ultraviolet part of the spectrum....
Petzval lens
A high-speed, narrow-field lens consisting of two achromats spaced about the aperture stop. Its uses include portrait...

(45 results found)

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