Register
Sign In
Suppliers
Products
Categories
Handbook
Dictionary
Careers
Resources
Photonics Spectra
BioPhotonics
Vision Spectra
Virtual Events & Summits
Educational Institutions
Add/Update Your Listing
Exhibitor Listing Portal
Become an Exhibitor
Buyers' Guide Print Edition
Marketplace Help
Subscribe
Advertise
Suppliers
Products
Categories
Handbook
Dictionary
Careers
Resources
Photonics Spectra
BioPhotonics
Vision Spectra
Virtual Events & Summits
Educational Institutions
Add/Update Your Listing
Exhibitor Listing Portal
Become an Exhibitor
Buyers' Guide Print Edition
Marketplace Help
Register
Sign In
Photonics Marketplace
Suppliers
Products
Handbook
Institutions
Dictionary
Show Filters
Hide Filters
Type
Definitions
Abbreviations/Acronyms
Browse by Letter
#
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
R
S
T
U
V
W
X
Y
Z
8,236 terms
Photonics Dictionary
Clear All Filters x
O-E x
transfer rate
The rate at which data can be read from a CD-ROM.
transient
->
current transient
A sudden, brief increase in current or voltage in a circuit that can damage sensitive components and instruments. Preventive measures include slow-starter circuits, filtering and static control.
transient calorimetric technique
A method of measuring total hemispherical emissivity of the plane surface of a solid that consists of thermally isolating a specimen of the material inside a vacuum, preheating it slightly above the...
transistor
An electronic device consisting of a semiconductor material, generally germanium or silicon, and used for rectification, amplification and switching. Its mode of operation utilizes transmission...
transit
->
surveying instruments
Instruments used for measuring angles and occasionally lengths on the ground. The principal surveying instruments are the level, the stadia telescope, the transit and the theodolite. Laser...
transition
The process whereby a quantum mechanical system alters from one energy level to another. During this process, energy is emitted or absorbed, and it usually takes the form of photons, phonons, or...
transition metal
Transition metals are elements found in the d-block of the periodic table, which includes groups 3 to 12. They are characterized by their partially filled d orbitals in the electron configuration....
translucent
Pertaining to materials having the property of reflecting a part and transmitting a part of the incident radiation.
translucent screen
A screen composed of a sheet of diffusing plastic material that reveals excellent image detail for close viewing. It is efficient for use with microfilm readers.
transmission efficiency
Measure of the amount of light that is transmitted, relative to the amount lost by absorption or reflection.
transmission electron microscope
A transmission electron microscope (TEM) is a powerful microscopy technique that uses a beam of electrons to create high-resolution images of extremely thin samples. In a TEM, electrons are...
transmission grating
A transparent diffraction grating that serves to transmit light.
transmission hologram
A hologram that is illuminated by a source opposite the viewer.
transmission limit
A restricting wavelength above or below which a specified form of radiation is totally almost absorbed by a specified medium.
transmission loss
The decrease in power that occurs when an optical beam or signal is transmitted through a system.
transmission plane
In polarized light, the plane of vibration that a polarizer will transmit.
transmission sphere
A precision lens designed to convert the plane wavefront output of an interferometer to a spherical wavefront for the testing of curved (spherical) surfaces.
transmission window
->
spectral window
A wavelength region of relatively high transmittance, surrounded by regions of low transmittance.
transmission
In optics, the conduction of radiant energy through a medium. Often denotes the percentage of energy passing through an element or system relative to the amount that entered. See transmission...
transmissivity
The internal transmittance per unit thickness of a nondiffusing material.
transmissometry
The methods used to determine the extinction characteristics of a medium.
transmittance
The ratio of the radiant power transmitted by an object to the incident radiant power.
transmitter central wavelength range
The central wavelength range of a transmitter based on the worst-case scenarios of temperature, manufacturing and other variations.
transmitter
In fiber optic communications, a light source whose beam can be modulated and sent along an optical fiber, and the electronics that support it.
transparency
An image affixed to a transparent photographic film or plate by photographic, printing or chemical methods. It may be viewed by transmitted light.
transparency illuminator
A metal box with an opal glass front enclosing a lamp, used for viewing color transparencies or x-ray films.
transparent
Capable of transmitting light with little absorption and no appreciable scattering or diffusion.
transparent electrophotographic films
Imaging materials that generally consist of a polyester base, a transparent electrically conductive layer and an organic photoconductive top coating. When charged and exposed to light, an...
transponder
A receiver-transmitter device that automatically transmits a signal when the proper interrogating signal is received.
transport shift register
The element in a charge-coupled device that receives the charge packets transferred from the line of sensor sites and then delivers the image data to the device's output circuitry.
transport theory approximations
Multiple scattering method used in biological analysis in which approximations yield simple, explicit solutions, at least for slab geometry. The approximations are usually differential equations...
transposition
In optics, the changing of the relative curves of a lens without changing its refractive value.
transputer
A computer whose architecture contains several CPU chips arranged in parallel. Often used in image processing systems.
transverse chromatic aberration
An alternate term for lateral chromatic aberration. See chromatic aberration.
transverse coherence
->
spatial coherence
The maintenance of a fixed-phase relationship across the full diameter of a cross section of a laser beam.
transverse electric mode
->
transverse mode
In the context of optics and lasers, a transverse mode refers to a specific spatial pattern of the electric field within the cross-section of a laser beam. These modes represent the different...
transverse electromagnetic mode
->
transverse mode
In the context of optics and lasers, a transverse mode refers to a specific spatial pattern of the electric field within the cross-section of a laser beam. These modes represent the different...
transverse field modulator
A Pockels cell in which electrical current is applied in a direction orthogonally to that of the light beam.
transverse interferometry
The method used to measure the index profile of an optical fiber by placing it in an interferometer and illuminating the fiber transversely to its axis.
transverse mode
In the context of optics and lasers, a transverse mode refers to a specific spatial pattern of the electric field within the cross-section of a laser beam. These modes represent the different...
transverse offset loss
->
lateral offset loss
A power loss caused by transverse or lateral deviation from optimum alignment of source to optical waveguide, waveguide to waveguide, or waveguide to detector.
transverse offset method
A technique used to measure the mode-field diameter of an optical fiber by scanning one fiber past another at a distance of five microns or less.
transverse pumping
The laser pumping that exhibits an advantage over longitudinal pumping in that the threshold pump power density can be lowered approximately in proportion to the laser length.
transverse scattering
The method for measuring the index profile of an optical fiber or preform by illuminating it coherently and transversely to its axis, and examining the far-field radiation pattern.
transversely excited atmosphere carbon dioxide laser
Abbreviated TEA CO2 laser. A gas laser that provides shorter pulses and higher peak powers than conventional CO2 lasers. The electrical excitation pulse occurs transversely to the optical axis...
transversely excited atmosphere laser
Also known as TEA laser. A coherent optical source with a wide wavelength range in the infrared, visible and ultraviolet that uses an electrical discharge transverse to (across) the optical axis to...
trapezium distortion
The distortion of an image formed by a cathode-ray tube, caused by unbalanced deflection voltages or deflection voltages that are not symmetrically aligned with the resultant anode potential.
trapped mode
->
guided mode
In an optical waveguide, a mode whose field decays monotonically in the transverse direction everywhere external to the core and which does not lose power to radiation. Also called bound mode.
trapped plasma avalanche-triggered transit
Oscillator device composed of a semiconducting diode in a coaxial resonating cavity. When the biasing current is applied to the diode, high-frequency waves are emitted into the cavity where they are...
trapped ray
->
guided ray
In an optical waveguide, a ray that is completely confined to the core.
<
1
2
3
...
153
154
155
156
157
...
163
164
165
>
Photonics Dictionary
Need Help?
Explore Our Content
News
Features
Latest Products
Webinars
White Papers
All Things Photonics Podcast
Videos
Our Summits & Conferences
Industry Events
Bookstore
Join Our Community
Subscribe
Advertise
Become a member
Sign in
Contribute a Feature
Suggest a Webinar
Submit a Press Release
Mobile Apps
About Us
Our Company
Our Publications
Contact Us
Career Opportunities
Teddi C. Laurin Scholarship
Terms & Conditions
Privacy Policy
California Consumer Privacy Act (CCPA)
©2024 Photonics Media
100 West St.
Pittsfield, MA, 01201 USA
[email protected]
We use cookies to improve user experience and analyze our website traffic as stated in our
Privacy Policy
. By using this website, you agree to the use of
cookies
unless you have disabled them.