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intravital microscopy

Intravital microscopy is an imaging technique used to visualize biological processes within living organisms, typically in real-time. Unlike traditional microscopy, which involves the examination of...

ideal polarization rotator

A theoretical instrument conceived of as a box that receives a beam of radiation of any arbitrary polarization angle and produces a new beam, coaxial with the incident beam, having a specified new...

image converter

An electron tube that employs electromagnetic radiation to produce a visual replica of an image produced on its cathode. Electrons ejected from the cathode by the incident radiation are accelerated...

image splitting eyepiece

An eyepiece having a special prism arrangement linked to a micrometer screw to allow reading of the angular relations between the two prism segments to be varied. When the prism faces are parallel,...

immersion objective -> oil-immersion objective

A form of high-power microscope objective where the space between the object and the first element is filled with an oil having the same index as that element. This form reduces losses, increases the...

indent

A flaw deliberately introduced into an optical fiber to prepare it for cleaving.

index liquid -> refractive index liquids

A closely spaced series of well-known chemicals having a refractive index lying between 1.33 for water and 1.95 for a solution of phosphorus in carbon disulfide. They are used to identify powdered...

inductance

Inductance is a fundamental property of an electrical circuit or component that describes its ability to store energy in a magnetic field when an electric current flows through it. It is typically...

infrared absorption

Infrared radiation absorbed by crystals as a result of the excitation of lattice vibrations in which ions having opposite charges move relative to one another. These vibrations take place in a narrow...

infrared beacon

An infrared source, set in a stationary position, that is used as a reference in certain navigational systems.

infrared radiation source

Any object that emits radiation of a wavelength lying between about 0.75 to 1000 µm. A calibrated secondary source usually is a heated cavity (blackbody) or a filament lamp rated in wattage...

infrared spectrophotometer

A spectrophotometer having a prism or, more frequently, a grating for the study and recording of infrared spectra. It usually consists of a radiation source such as a Nernst glower, a monochromator,...

inspection mirror

A small round mirror on the end of a handle used for viewing inside an inaccessible cavity.

interlayer attraction

Interlayer attraction refers to the attractive forces between adjacent layers of atoms or molecules in a material, particularly in layered structures such as van der Waals solids, graphene, and...

intermediate Herschel effect -> Herschel effect

The decrease in effect in developable density on a photographic plate formed by a second exposure to radiation having a longer wavelength, usually red or infrared.

invisible light filter

A filter that transmits infrared and ultraviolet but is opaque to visible radiation.

ion laser

A laser in which the transition involved in stimulated emission of radiation takes place between two levels of an ionized gas. The gases are electrically excited in a container called a plasma tube,...

isobar

One of a number of nuclides characterized by an identity between their mass numbers, but each having a different atomic number.

isochromatic

Having the same chromaticity or color.

isogyric curves

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

isophote

A curve or surface having equivalent light intensity.

isotemperature line -> correlated color temperature

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

Photonics DictionaryDefinitionsI

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