ON DEMAND: Four exclusive presentations detailing emerging test and measurement protocols
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
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
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
17 terms
Photonics Dictionary: G
Clear All Filters x
glasses x
G x
generating
A rapid roughing process for the quick removal of glass, the first step in manufacture of a curved lens surface. It is accomplished with coarse emery or a diamond-impregnated tool.
germanate glass
A type of glass used in near-infrared optical components, in which germanium is used as a cation instead of silicon.
glass
A noncrystalline, inorganic mixture of various metallic oxides fused by heating with glassifiers such as silica, or boric or phosphoric oxides. Common window or bottle glass is a mixture of soda,...
glass annealing furnace
A furnace, generally electrically heated, with a control system capable of following a cam by which the temperature can be made to go through a definite cycle over a period of days, or even weeks, if...
glass barium
A type of glass containing barium oxide, which is added to increase the refractive index while maintaining a relatively low dispersion.
glass capacitor
A capacitor that uses glass as its dielectric material.
glass dosimeter
A device that detects and measures the quantity of exposure to nuclear radiation. It uses a special glass rod that fluoresces when placed under ultraviolet radiation after its exposure to nuclear...
glass film plates
An early form of photographic media consisting of glass plates coated with an emulsion.
glass laser
An optically pumped solid-state laser in which the active medium is a neodymium ion in a glass rod host. Abbreviated Nd:glass.
glass marking ink
Ink used for writing on glass, and also for blackening the edges of lenses to prevent reflection. In the latter case, the refractive index of the ink must closely match that of the glass.
glass spectrograph
A spectrograph having glass as its refracting component and used in cases where speed and high dispersion are not required. The glass material has a range of about 3700 to 8000 Å.
glass-ceramic
A type of glass used in telescope mirrors, formed by adding a nucleating agent to standard glass and then heating it until it crystallizes.
glass-melting furnace
A furnace used to heat glass materials. It may be a small laboratory-type furnace for small-scale experiments or large enough to hold gas-fired tanks for the commercial mass production of glass....
Goldberg wedge
A neutral-colored gelatin wedge, cast between glass plates, that is used as an intensity scale in certain types of sensitometers; the greater the thickness of the wedge through which light emitted by...
green block
A porous ceramic substance that is ground to a given optical form and on which a polished plate of glass is sagged by heat application. It is capable of transmitting in a partial vacuum. The glass...
GRIN lens
A GRIN (gradient index) lens is a type of optical lens that utilizes a gradient in refractive index across its volume rather than having a uniform refractive index like conventional lenses. This...
ground glass
A plate of glass in which a face has been frosted by grinding or etching. It diffuses light by scattering in directions close to the incoming beam, but the light falls off rapidly at larger angles...
Photonics Dictionary
G
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.