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
emission spectrum
An emission spectrum is a graphical representation or a characteristic pattern of the wavelengths or frequencies of light emitted by a source, such as an atom, molecule, or celestial object. It shows...
emissive power
The emissivity of a body times the emissive power of a blackbody at the same temperature. For a blackbody, it is the total radiation per unit area of radiating surface.
emissivity
The ratio of an object's radiance to that emitted by a blackbody radiator at the same temperature and at the same wavelength.
emissivity correction matrix
A computer-generated routine for achieving true-temperature readings in thermal infrared imaging systems.
emissometry
The use of a material's emissivity to measure absorption. It is useful as an absorption loss measurement technique, since at thermal equilibrium, emittance is equal to absorptance.
emitter
A source of radiation.
EML
electro-absorptive modulated laser
EMMA
electron microscopy and microanalysis
emmetropia
The normal condition of vision where an object at infinity is in sharp focus with the eye lens in a neutral or relaxed state.
EMP
electromagnetic pulse
empty magnification
Magnification that is above the level of maximum useful magnification and does not contribute useful resolving power. In a visual telescope, empty magnification is any in excess of 20 D, where D =...
EMR
electromagnetic radiation
EMRLD
excimer moderate-power Raman shifted laser device
EMU
electromagnetic unit
emulsion
In photography, the layer of light-sensitive material (usually a suspension of silver halide crystals) that coats the film or plate.
emulsion speed
The sensitivity of a photographic emulsion when exposed to light, provided that the film is developed through a standard process.
enantiomer
Enantiomers are a pair of molecules that are non-superimposable mirror images of each other, similar to left and right hands. They are stereoisomers, meaning they have the same molecular formula and...
enclosed arc lamp
An arc lamp whose carbon electrodes are enclosed in a transparent chamber, resulting in an arc that is steadier, lasts longer and emits more ultraviolet radiation.
enclosed laser device
A laser or laser system positioned within an enclosure to prevent dangerous optical radiation from leaving the enclosure.
encoder
->
optical encoder
A device designed to measure linear or rotary motion by detection of the movement of markings on a transparent medium past a fixed point of light. The encoder has a moving code plate, a glass disc...
end-fire coupling
End-fire coupling refers to a method of coupling energy into or out of a waveguide, transmission line, or antenna, where the electromagnetic waves are directed primarily along the axis or direction...
endoscope
An endoscope is a medical device used for visualizing and examining the interior of hollow organs, body cavities, or confined spaces within the body. It consists of a flexible or rigid tube equipped...
endoscopic photography
The photographing of objects within generally inaccessible areas using endoscopes with camera attachments.
energy density
The energy in a medium per unit volume.
energy-sharing laser
A laser that distributes its output power among two, three or four optical fibers simultaneously.
ENG
electronic news gathering
engram
A hologram produced by a pair of radiation beams, each carrying information.
enhanced Faraday effect
The occurrence of very large rotations in transparent materials at weak magnetic fields as predicted in the classical dispersion theory. This effect was discovered by Mavaluso and Corbino in 1898 in...
enhanced graphic adaptor
An image processing device that displays pseudocolor images by assigning colors to the gray scales according to look-up tables defined by the user.
enhanced picture archiving and communication system display
Enhanced picture archiving and communication system (PACS) display (ePAD) is a software tool used in medical imaging to view, manipulate, and analyze radiological images, such as x-rays, CT scans,...
enhanced pulsing
A type of laser pulsing with high laser power at the beginning of the pulse.
enhanced spectral line
The line from a spark or other very hot source that has greater intensity than that of a line produced by an arc or flame source. Also called an enhanced line.
ENI
equivalent noise input
entrainment
The movement of particulate material by flowing gas or liquid.
entrance pupil
In a lens or other optical system, the image of the aperture stop as seen from object space.
entrance slit
The entrance slit, also known simply as the slit, is an essential component in optical instruments such as spectrometers and monochromators. It is a narrow opening or aperture through which light...
envelope delay distortion
Distortion caused by variations in the rate of change of phase shift with frequency over the signal's necessary bandwidth.
envelope
Also referred to as a bulb. The glass housing that encloses an incandescent source, or the glass or metal housing that encloses an electron tube.
environmental chamber
A test chamber designed to expose the subject being tested to external conditions, such as heat, shock, pressure and moisture, for the study of their effects.
environmental parameters
Potential hazards to a system's application and installation, including temperature variations, chemical reactivity, mechanical stress and moisture.
environmental range
The maximum to minimum range of temperature, pressure, humidity, vibration and biological conditions under which an optical component or system can function and be stored. The range required depends...
enzyme-linked immunosorbent assay
An enzyme-linked immunosorbent assay (ELISA) is a laboratory technique used to detect and measure the presence of specific substances, such as antibodies, antigens, proteins, hormones, or other...
EOID
electro-optic identification
EOIS
electro-optic imaging system
EOLM
electro-optic light modulator
EOPC
electro-optic phase change
EOPP
Earth orbiting polar platform
EOS
Earth observation satellite; electro-optic system; European Optical Society
EOSPC
electro-optic signal processing computer
EPA
European Photonics Association; Environmental Protection Agency
<
1
2
3
...
47
48
49
50
51
...
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.