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AdTech Ceramics - Ceramic Packages 1-24 MR

Edmund Optics - Manufacturing Services 8/24HP

8,726 terms

Photonics Dictionary

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...

buckyballs -> fullerenes

Molecules composed entirely of carbon, in the form of a hollow sphere, ellipsoid or tube. Also called buckyballs. Cylindrical fullerenes are called carbon nanotubes or buckytubes.

BUF

beam utilization factor

buffer

1. In fiber optics, a protective material applied as an optical fiber cover that has no optical function. 2. In image processing, a peripheral that stores data between two active processing stages.

bulk acoustic wave

A sound wave that travels through a piezoelectric material.

bulk nonreciprocal device

A device that functions throughout the continuous radiation of a linearly polarized plane wave, and whose nonreciprocity arises from the Faraday rotation of linearly polarized radiation.

bulk scattering

The scattering of light within a medium.

bump-forming optical disk -> dye-polymer optical disc

A type of erasable data storage device that uses a medium deposited on the disc in two layers, each dyed to absorb a different wavelength of laser light. To record data, the lower layer is heated by...

bundle

A conical or cylindrical package of light rays emanating from a common point on the object.

Bunsen screen

A photometer screen that contains a diaphragm of paper or parchment with a translucent central spot of oil or paraffin.

Bunsen-Roscoe law

The law stating that the amount of chemical change produced is proportional to the amount of light absorbed. Actually, the change is also dependent on the intensity of light -- a fact named the...

burn

A surface imperfection caused by a polisher running dry too long. It occurs with felt or plastic polishers, and may appear as a reddish brown.

burn-in

The operation of a laser diode or other component prior to its use in its intended application, as a means of testing and stabilizing it.

burn-through

A detector's ability to sense an object on the opposite side of a thin but opaque barrier such as cardboard.

burning glass

A convex lens that brings an incident bundle of rays to a focus to produce intense heat at the focus.

burnishing

The process of lapping a thin edge of metal over the bevelled edge of a lens to maintain it within its cell.

burst mode laser

A high-frequency pulse-rate laser with an output limited by the heat capacity of the laser medium. Instead of having continuous cooling, the laser operates until the medium reaches a maximum...

burst pressure

The measure used in vacuum technology to quantify the total pressure capacity of the ferrofluidic seal before it fails.

bus

A local area network topology in which all nodes are tapped off a single cable, and all hear every transmission on the cable.

Butterworth filter

An electric filter that is characterized by a passband of the flattest possible shape.

button

A piece of glass with a high refractive index that is fused to the major blank.

button blocking

The production of a block by attaching the optical elements to a plate by means of individual buttons of pitch or other thermoplastic material.

BUV

backscatter ultraviolet

bandwidth

BWDM

birefringent wavelength division multiplexing

BWO

backward-wave oscillator

BXA

Bureau of Export Control

byte

The number of bits used to represent a character.

centi-; speed of light in a vacuum

Celsius; coulombs; cycles

c to c

center to center

C-band

conventional band

C-mount lens

A C-mount lens refers to a specific type of lens commonly used in machine vision, surveillance, microscopy, and other imaging applications. The "C-mount" designation refers to the standard interface...

C-mount

A standard lens interface initially made for 16mm movie cameras and now used primarily on closed-circuit television cameras. It is a 1-in.-diameter, 32-thread-per-inch interface with a...

C/AHARS

compass/attitude heading and reference system

clear aperture

cable -> fiber optic cable

A package for an optical fiber or fibers that may include cladding, buffering, strength members and an outer jacket.

cache

A portion of computer memory that is used for temporary storage of frequently accessed data. Substantially increases computer speed.

CAD

computer-aided design

CADE

computer-assisted data entry

CADF

cathode-ray tube automatic direction finding

cadmium lamp

A mercury vapor discharge lamp that has cadmium added to emit radiation in the red region as a complement to the mercury vapor's blue and green radiation.

cadmium lines

The three lines in the spectrum of cadmium that have the purest radiations and that were first used by Michelson to calculate the standard meter.

cadmium red line

The narrowest line of the cadmium spectrum; the red line has the purest radiation.

cadmium sulfide

An inorganic compound, yellow to orange in color, that fluoresces strongly enough when bombarded by a high-current-density electron beam to be used as a high-intensity light source.

cadmium sulfide cell

A photoconductive cell having cadmium sulfide as its photoconducting material for the production of a very high dark-light resistance ratio.

CAE

computer-aided engineering

CAIBE

chemical-assisted ion-beam etching

cal

calorie

calcite

A doubly refracting mineral used to produce polarizing prisms. It is uniaxial negative and in the trigonal division of the hexagonal system of crystals. Its indices are e = 1.486, w = 1.658; its...

Photonics Dictionary

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