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
8,289 terms
Photonics Dictionary
Clear All Filters x
ns x
Bragg spectrometer
->
ionization spectrometer
Also known as the Bragg spectrometer. A system used for the x-ray analysis of crystal structure. In the instrument, a homogeneous beam of x-rays is directed on the known face of a crystal and the...
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 or resolution and, at the same time, denoting the angle at which the...
brass gauge
A sheet of thin brass, one edge of which has been accurately cut to a known and marked circular radius. It is used to check the radius of curvature of a rough-ground lens by contact.
Bravais-Miller index
One of the constants h, k, f or I, used to demonstrate any set of parallel planes in a crystal of the hexagonal system.
BRDF
bidirectional reflectance distribution function
breadboard
An experimental model of an electrical circuit or complex assembly; a prototype.
break current
The point at which decreasing current supplied to a laser results in the extinguishing of the laser discharge.
breakdown voltage
In avalanche photodiodes, the point at which an increase in the reverse bias voltage causes the current gain to approach infinity.
breakout cable
A breakout cable, also known as a fan-out cable or breakout assembly, is a type of cable that combines multiple individual cables into a single, larger cable. The breakout cable is designed to...
Breit-Wigner formula
Theoretical calculation of the cross section for a nuclear reaction given in the vicinity of a single resonance level in the compound nucleus.
bremsstrahlung
Electromagnetic radiation that is emitted by an electron as it is accelerated or decelerated while moving through the electric field of an ion.
Brewster angle window
A parallel plate of glass in such a position that the refracted and reflected rays of incident parallel light are mutually perpendicular. In this situation the reflected light is plane polarized, and...
Brewster's angle
For light incident on a plane boundary between two regions having different refractive indices, the angle of incidence at which the reflectance is zero for light that has its electrical field vector...
Brewster's fringes
The fringes used in the Jamin interferometer and produced by light that has been internally and externally reflected by two plane-parallel plates, inclined toward each other at a small angle.
Bridgman technique
Crystal growth method that resembles static freeze, but that induces growth by removing the ampoule from the furnace so that the freezing-point temperature gradient is unchanged during the growth...
bright-field illumination
The illumination generally used in microscopy, whereby the specimen appears dark against a light background.
bright-field image
An optical image having a brightly lit background.
bright-line spectrum
An emission spectrum consisting of bright bands against a dark background.
brightfield
Brightfield refers to a type of microscopy and imaging technique in which the specimen is illuminated with a white light source, and the image is observed or captured against a bright background. In...
brightness
->
luminance
Luminous flux emitted from a surface per unit solid angle per unit of area, projected onto a plane normal to the direction of propagation. Also known as brightness and luminous sterance.
brightness control
The manual shifting bias control of a cathode-ray tube that determines both the average brightness and the contrast of a picture.
brightness meter
An instrument for measuring the brightness (luminance) of a scene. It may be a spot meter, covering an area of a degree or less, or an averaging meter, covering a broad area of the scene. Brightness...
brightness resolution
The degree to which a pixel in a digital image represents the analog brightness of the corresponding point in the original image. It is dependent largely on the number of bits devoted to representing...
brightness scale
A graduated range of stimuli perceived as having equivalent differences of brightness.
Brillouin microscopy
Brillouin microscopy is a non-invasive imaging technique that utilizes Brillouin scattering to measure the mechanical properties of materials at the microscale. This advanced optical technique...
Brillouin scattering
Brillouin scattering is a phenomenon in physics where an incident electromagnetic wave (usually light) interacts with acoustic phonons (quantized lattice vibrations) in a material, resulting in the...
bring-in
The final correction of a polished surface or of an angle to the specified precision.
BRITE
Basic Research in Industrial Technology for Europe
broadband
Indicating a capability to deal with a relatively wide spectral bandwidth.
broadband dielectric mirrors
Broadband dielectric mirrors, also known as broadband mirrors, are optical coatings designed to efficiently reflect or transmit light over a broad range of wavelengths. These mirrors are constructed...
broadband filter
A broadband filter is an electronic or electromagnetic device designed to pass a range of frequencies or signals within a specified bandwidth while attenuating or rejecting signals outside of that...
broadband incident radiation
->
white light
Light perceived as achromatic, that is, without hue.
broadside radiation
Radiation that occurs perpendicular to the plane of the radiation device.
broken edge
A chamfer or protective bevel.
bronchoscope
An optical instrument designed to permit the visual examination of the interior of the bronchi.
Brownian motion
The behavior of microscopic solid particles suspended in a fluid, first observed by botanist Robert Brown in 1827 as a continuous random motion.
Brucke loupe
A telemicroscope in which a negative eyepiece is used to produce erect images.
BS
bandstop
BSDF
bidirectional scatter distribution function
BSDN
block-switching digital network
BSO
bismuth silicon oxide
BSTV
boresight television
BTDF
bidirectional transmission distribution function
BTDL
basic transient diode logic
Btu
British thermal unit
bubble chamber
A large tank filled with liquid hydrogen, with a flat window at one end and complex optical devices for observing and photographing the rows of fine bubbles formed when a high-energy particle...
bubble chamber optics
Specially designed optics for the observation and photographing of hydrogen in a bubble chamber.
bubble chamber photography
The photographic recording of gas bubbles produced when particles traverse liquid hydrogen in a bubble chamber.
bubble memory
->
magnetic bubble film
An amorphous film in which cylindrical bubbles of reverse magnetization can be formed to follow circuit paths usually made by depositing magnetic metal strips on the film surface. It is used in...
bubble writing
->
beam-addressable technology
The application of reversible writing with a laser beam on particular storage materials. In one method, an amorphous film is heated and then crystallized for writing. Bubble writing involves the...
<
1
2
3
...
27
28
29
30
31
...
164
165
166
>
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.