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Excelitas PCO GmbH - PCO.Edge 11-24 BIO HP

8,726 terms

Photonics Dictionary

isochromatic

Having the same chromaticity or color.

isochromatic lines

1. Lines of the same color. 2. A term used in photoelastic stress analysis to refer to the interference fringes produced in birefringent materials.

isocon -> image isocon

A television camera tube that preceded the development of the vidicon tube and incorporated a method to separate reflected and scattered portions of the return beam so that only the scattered...

isodensities

The points on a photographic negative that are of equal density.

isodivs

A graphic depiction of the loci of all points in space relative to a laser transmitter at a specific altitude.

isogyric curves

With respect to the effect of crystals on lightwaves, the family of curves having constant direction of polarization.

isolator

In the context of electronics and optics, an isolator refers to a device that allows the transmission of signals in one direction while attenuating or blocking signals in the opposite direction. The...

isoperibol enclosure

An enclosure for a calorimeter that allows measurement of unusually low quantities of power and energy.

isophote

A curve or surface having equivalent light intensity.

isophotometer

A direct recording photometer that is designed to scan a photographic negative to determine its points of isodensity.

isoplanatic

Free of coma.

isopreference curves

Graphic representation of quantified values of image quality whose points all refer to images that are of a constant subjective quality.

isosorbs

Lines of equal atmospheric attenuation in a laser beam.

isotemperature line -> correlated color temperature

Temperature of the blackbody having chromaticity nearest to that of the test source on a specified chromaticity diagram.

isoth

isothermal

isotope shift

The slight difference in wavelength of an element's given spectral line observed in comparing different isotopes of that element.

isotopically selected laser spectroscopy

A spectroscopic technique in which an excitation band absorbs laser energy resulting in an electronic transition. The isotopic species may then be measured using a time of flight mass spectrometer....

isotropic

That property of a material that determines that velocity of propagation within the material is the same for all directions.

ISTM

International Society of Testing and Materials

interline transfer

ITO

indium tin oxide

ITU

International Telecommunications Union

international unit

IUPAC

International Union of Pure and Applied Chemistry

IVHS

intelligent vehicle highway system

IVPO

inside vapor-phase oxidation

joule

J-T

Joule-Thomson

jacket

The outer material that surrounds and protects the buffered and unbuffered fibers in an optical cable.

Jacquinot advantage

The higher throughput obtained with an FTIR device compared with traditional spectrometers that need slits to achieve resolution. The advantage differs according to wave number and resolution.

Jamin refractometer

An instrument designed to measure the index of refraction of a gas by the interference patterns formed by two beams, one of which passes through a vacuum tube in which the gas is slowly released.

Jansky noise

Phrase applied to any noise of extraterrestrial origin, named for the engineer who discovered the phenomenon.

jellet prism

A prism produced by severing a Nicol prism and reconstructing the polarization angles of the two halves so that they are slightly wedged toward each other.

jet-streamed dye laser

A continuous-wave dye laser that uses a circulation pump and nozzle to provide an optically flat stream of dye across the laser's optical axis.

JIAWG

joint integrated avionics working group

jig

A device to hold and locate a workpiece as it guides, controls or limits a cutting tool.

jig allowance

Also called coating jig allowance. That margin on an optical component that is outside the clear aperture for use in holding the component in the optical thin-film coater tooling during the...

jig transit

An optical instrument containing a gimballed sighting telescope, used to measure angular relationships in horizontal and vertical planes.

JIS

Japan Industrial Standards

JIT

just in time

jitter

1. In relation to cathode-ray tube displays, errors in the signal's amplitude, phase or both that result in small, rapid aberrations in size or position of the image. 2. Errors of synchronization...

Johansson geometry

A design for bent crystal monochromators in which spacing is constant along any circular arc terminating at the two foci and with equally spaced Bragg planes curved about only one axis.

Johnson's curve

The graph of a curve describing the spectral irradiance of extraterrestrial sunlight.

joint transform correlator

A device consisting of two optical systems in which two signals are simultaneously transformed to produce their spectra, and these spectra are multiplied and inversely transformed to produce the...

Josephson effect

Characteristic of radiation detectors that produce energy that is similar to the energy of superconductive gaps when interacting with photons.

joule

A unit of energy or work in the MKS system of units. One joule is equal to 107 ergs.

Joule-Thomson cooler

A detector cooling device in which a gas under high pressure escapes through an expansion valve in the tank; as the escaped gas liquefies, it cools the site of the sensor.

JPL

Jet Propulsion Laboratory

JSIPS

joint services image processing system

JSTARS

joint surveillance target attack system

Photonics Dictionary

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