LightPath Technologies - Precision Molded Optics 10-24 LB

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387 terms

Photonics Dictionary

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transmittance

The ratio of the radiant power transmitted by an object to the incident radiant power.

transmitter central wavelength range

The central wavelength range of a transmitter based on the worst-case scenarios of temperature, manufacturing and other variations.

transmitter

In fiber optic communications, a light source whose beam can be modulated and sent along an optical fiber, and the electronics that support it.

diffuse transmittance

The ratio of diffusely transmitted flux to incident flux.

double-pass transmittance hologram

A hologram having an object wave that has been transmitted through the transparent object media to a mirror, reflected again and recorded on a medium.

heat-transmitting filter

A filter that allows heat radiation from an incident beam to pass without absorption or reflection.

internal transmittance

The ratio of the radiant power transmitted to the second surface of a medium to the corresponding radiant power that has just passed through the first surface. Internal transmittance does not denote...

maximum luminous transmittance

The greatest luminous transmittance possible for a specified chromaticity.

regular transmittance

The part of incident flux that is transmitted with no scattering.

television transmitter

An electronic device used to encode video and audio signals of a television camera into radio waves that are broadcast to remote receivers. The video and audio components are transmitted...

vertical transmitted illumination

With respect to microscopy, light that is directed through the specimen by a substage condenser.

heat filter -> heat-transmitting filter

A filter that allows heat radiation from an incident beam to pass without absorption or reflection.

abridged spectrophotometer

An abridged spectrophotometer refers to a simplified or compact version of a traditional spectrophotometer, which is a scientific instrument used to measure the intensity of light at different...

absorptance

Absorptance refers to the fraction of incident electromagnetic radiation (such as light or infrared radiation) that is absorbed by a surface, rather than being reflected or transmitted. It is a...

absorption

Absorption is the process by which a material takes in energy from electromagnetic radiation (such as light, heat, or sound) and converts it to other forms of energy, typically internal energy (such...

absorption lens

An absorption lens is a type of optical lens that not only focuses or diverges light but also significantly absorbs certain wavelengths of the incident light. This dual function makes it different...

absorption meter

A measuring device that uses a light-sensitive cell or detector to determine the amount of light transmitted by a substance.

absorption spectrophotometer

Measures the absorption or sample transmittance over a range of specified wavelengths. Sample may be placed within the device and the transmission measured to an accuracy of given percent. The...

absorption spectroscopy

Absorption spectroscopy is a fundamental analytical technique used to study the interaction between electromagnetic radiation and matter. It involves measuring the absorption of light by a sample...

acoustic surface wave -> acoustic surface wave

An acoustic surface wave, often abbreviated as ASW, is a type of mechanical wave that travels along the surface of a material, such as a solid or a liquid, rather than propagating through its volume....

acoustic surface wave

acousto-optic tunable filter

An acousto-optic tunable filter (AOTF) is a device that utilizes the acousto-optic effect to selectively filter and transmit light based on its wavelength or frequency. It operates by applying an...

active infrared system

An active infrared (IR) system is a type of technology that uses infrared radiation actively emitted and detected by sensors for various purposes. Here are the key features and applications of active...

advanced tactical air reconnaissance system

An aerial reconnaissance system that can transmit, in near real time, image data recorded by IR and visual-spectrum sensors, providing day, night and foul-weather intelligence.

alternating current

Alternating current (AC) is an electrical current in which the direction of flow of electric charge periodically reverses. This reversal occurs at regular intervals, typically in a sinusoidal...

amplification -> gain

Also known as amplification. 1. The increase in a signal that is transmitted from one point to another through an amplifier. A material that exhibits gain rather than absorption, at certain...

amplified spontaneous emission

Broadband radiation emitted by a laser that does not transmit through the optical element. It can be removed by filtering.

amplitude-modulated sensor

A type of fiber optic sensor that detects alteration in position, distance, pressure, liquid level or temperature by transmitting light across a gap to a reflector; a change in the light returned to...

antiguide

A waveguide that has a core with a lower refractive index than the refractive index of the cladding. This structure can limit the power of the transmitted beam by removing unwanted radiation, for...

aperture diaphragm

The second adjustable iris diaphragm in an optical system. In the common microscope condenser system, it usually is located beneath the substage condenser on a transmitted light microscope. When the...

aperture imaging

The formation of an image by a pinhole aperture that transmits radiation, such as gamma radiation.

asynchronous transfer mode

A method of data multiplexing that can provide large, instantaneous bandwidths for busy traffic while permitting slow traffic to use that bandwidth between bursts. Very short, fixed-length packets or...

atmospheric window

A range of wavelengths within which radiation transmitted through the atmosphere suffers relatively little absorption by atmospheric gases.

atomic absorption spectrometer

An atomic absorption spectrometer (AAS) is an analytical instrument used to determine the concentration of specific chemical elements in a sample by measuring the absorption of light at...

atomic absorption spectroscopy

The analysis of the atomic structure of a sample by means of a source radiation that is absorbed and emitted by the sample with lines corresponding to the number and arrangement of atoms. Generally a...

attenuated total reflectance spectroscopy

Attenuated total reflectance (ATR) spectroscopy is a technique used in analytical chemistry to obtain IR spectra of samples. It is particularly useful for analyzing solid and liquid samples without...

averaged threshold receiver

A receiver for optical communications systems consisting of a symmetric binary, pulse-code-modulated transmitter, a log-normal channel and an array of independent photocounting detectors that yield...

backlit

Refers to a display or screen that is illuminated from behind; the light is transmitted as opposed to reflected.

ball lens

A ball lens is a small, spherical optical component typically made of glass or other transparent materials. It is characterized by its spherical shape, with both its front and back surfaces forming...

band-elimination filter

A filter that suppresses a given range of frequencies, transmitting only those above and below that band. Also called bandstop filter.

bandstop filter -> band-elimination filter

A filter that suppresses a given range of frequencies, transmitting only those above and below that band. Also called bandstop filter.

barium fluoride

A relatively hard crystal, highly resistant to excessive energy radiation, that is frequently used for optical windows, prisms and lenses transmitting from the vacuum UV into the IR.

baseband

The simplest method of transmission on a local area network. The entire bandwidth of the cable is used to transmit a single unmodulated digital signal. Baseband transmission is capable of...

beam divider -> beamsplitter

A beamsplitter is an optical device used to divide a beam of light into two or more separate beams, typically by reflecting a portion of the incident light while transmitting the remainder....

beamsplitter

A beamsplitter is an optical device used to divide a beam of light into two or more separate beams, typically by reflecting a portion of the incident light while transmitting the remainder....

Beer's law

Transmittance of a stable solution is an exponential function of the concentration of the absorbing solute.

bifurcated fiber

A branched fiber optic lightguide that performs both receiving and transmitting functions.

bioelectricity

Bioelectricity refers to the electrical potentials and currents generated by biological processes within living organisms. These electrical phenomena arise from the movement of ions across cell...

birefringent filter

A filter that transmits light in a series of sharp, widely spaced wavelength bands by its sandwich construction of alternating layers of polarizing films and plates cut from birefringent crystal.

bit error rate

The ratio of the number of bits received incorrectly to the total number of bits transmitted digitally in a system.

Photonics Dictionary

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