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

Hamamatsu Corp. - Mid-Infrared LED 11/24 HP

8,726 terms

Photonics Dictionary

counting chamber

In microscopy, the chamber that is contained on a microscope slide to hold a certain amount of fluid. It is calibrated accurately to determine the number of cells and other elements while the...

coupled rangefinder

A rangefinder on a camera that is integrated with the focusing mechanism so that when an object's range is determined, the camera is automatically in focus.

coupler

1. In color development, the chemical that combines with certain by-products of the development procedure to form a dye. 2. Device for distributing optical power among two or more ports. 3. Device...

coupling efficiency

The fraction of available output from a radiant source that is coupled and transmitted by an optical fiber.

COV

coefficient of variation

covalent crystal

A crystal formed by covalent bonds that are generally highly directional by nature. The electric characteristics of these crystals classify them as semiconductors.

covered groove

A technique used in integrated optics where a groove is cut on a substrate surface and covered by a thin film to facilitate the construction of filters, resonators, beamsplitters and grating couplers...

coverslip

A coverslip, also known as a cover glass or cover slip, is a thin and flat piece of transparent material typically made of glass or plastic. It is used in microscopy to cover a specimen mounted on a...

candlepower

centipoise

CPC

compound parabolic concentrator

CPD

charge-primed device

CPH

computer polarization holography

CPI

common path interferometry

CPM

colliding pulse mode

cpm

cycles per minute

CPS

cathode potential stabilization

cps

cycles per second

CPU

central processing unit

CPV

concentrator photovoltaic

cathode ray; command register; control relay; coupling ratio; crystal rectifier

CRADA

cooperative research and development agreement

Craik-O'Brien effect

Observed when alterations in the luminous sterance at the contour of an object create the illusion of the outer zones appearing darker than the inner regions, despite the consistent luminance of the...

crater lamp

A glow-discharge tube in which the discharge takes place in the conical or crater-shaped depression at one end of the tube.

Crayford focuser

A high-quality focuser that uses rollers rather than gears and offers smooth, precise motion while reducing or eliminating image shift and backlash.

CRD

capacitor resistor diode

CRDF

cathode-ray direction finding

creep

The deformation of a material at high levels of stress, often associated with elevated temperatures.

cresyl violet

Cresyl violet, also known as cresyl violet acetate or cresyl echt violet, is a synthetic organic compound belonging to the class of triarylmethane dyes. It is commonly used in histology and...

CRI

color rendering index

cribbing

The breaking of the excess glass from the specified shape.

crimp sleeve

A crimped metal cylinder that holds the connector to the cable through the cable's strength member.

critical absorption wavelength

That wavelength at which the absorption of a given element or system begins to demonstrate an inconstant value.

critical angle

The least angle of incidence at which total internal reflection takes place. The angle of incidence in a denser medium, at an interface between the denser and less dense medium, at which the light is...

critical aperture

In an optical system, the aperture size at which the lens gives its best overall performance.

critical flicker frequency

Relative to a light source, the frequency at which the source appears to fluctuate in light intensity half the time and remains constant during the other half.

critical fusion frequency

The fusion frequency of flicker that is needed just to produce complete fusion and to assure the visual sensation of continuous illumination measured in cycles per second.

critical illumination

Illumination in which the light source is imaged at the object.

critical scattering

Intense scattering in the region of the liquid-gas critical point. At this point the gas will strongly scatter all light to create a vivid opalescent appearance.

CRLA

constrained run length algorithm

CRM

counter-radar missile; counter-radar measures

CRO

cathode-ray oscilloscope

Crookes radiometer -> radiometer

A device used to measure the intensity of radiant energy.

cross dispersion

Recombination of only the light that is correctly dispersed by the first stage of a polychromator through its wide intermediate slit (common during Thomson scattering experimentation), which is...

cross roller slide

A positioning slide mechanism with two rows of alternately crisscrossed cylindrical rollers.

cross section

Calculation of the probability of an interaction between two types of particles, such as light absorption, excitation or energy transfers. The probability that one incident particle will interact as...

cross wire

Fine lines, wires or threads used in the focal plane of many optical instruments to point out and locate particular objects in the field of view. They were formerly made from a single strand of...

cross-correlation

A signal-averaging technique that improves signal-to-noise ratio by comparing a sampled signal with a reference signal bearing some known relation to the received signal.

cross-coupling

1. A defect inherent in a multiple-axis positioning system whereby an adjustment of one axis causes an undesired change in another; its severity depends upon the degree to which the positioning axes...

cross-linked plastic

Plastic in which the polymer chains become irreversibly joined during molding. The cross-linking can be achieved by heating, chemical agents or irradiation.

Photonics Dictionary

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