Meadowlark Optics - Wave Plates 6/24 LB 2024

Photonics Marketplace

Suppliers Products

Handbook Institutions Dictionary

Show Filters

Hide Filters

Type

DefinitionsAbbreviations/Acronyms

Browse by Letter

Lambda Research Optics, Inc. - Beamsplitter Cubes

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

8,726 terms

Photonics Dictionary

fixed-pattern noise

Fixed-pattern noise is the measure of the static (nontemporal) differences between pixels when the detector is evenly illuminated. In microbolometers, this effect is mostly caused by mismatch between...

Fizeau fringes

Fizeau fringes are interference fringes observed in an interferometer, specifically in a Fizeau interferometer. The Fizeau interferometer is named after the French physicist Armand Fizeau, who...

Fizeau interferometer

A Fizeau interferometer is an interferometric device that uses the principle of interference to measure the surface flatness and quality of optical components. It consists of a light source,...

Fizeau toothed wheel

A device used to measure the speed of light by adjusting the rotation of a toothed wheel so that light passing through one tooth opening is reflected through the next. This device has since been...

FKE

Franz-Keldysh effect

footlambert

FLAIR

fiber-linked array image formatter

flame emission spectroscopy

A technique in photometry that uses an oxyhydrogen or oxyacetylene flame to optically excite a solution containing the sample to be analyzed.

flame excitation

The use of high temperatures, between 2000 and 3000 °C, to excite emission lines from a sample in spectroscopic analysis.

flame photometer

Any of a number of instruments that uses a flame to vaporize a solution of the chemical being analyzed so that light may be passed through the vapor. Monochromation of the transmitted light is...

flame photometry

A part of the spectrochemical analysis of a sample that deals with the excitation of that sample by flame analysis.

flame spectrometry

The procedure applied to flame-excited line emissions to determine spectra and wavelengths.

flame spectrophotometry

The study of the reflection or transmission properties of specimens as a function of wavelength after they have been excited by flame-analysis techniques.

flame spectroscopy

The study of flames by means of a laser emitting blue light and a spectrometer to measure the green fluorescence created by the flame chemistry.

flame spectrum

The emission spectrum formed by the radiation from a sample that has been evaporated by a nonluminous flame.

flange focal distance

The distance between the locating surface of the lens mount and the image plane.

flare

Nonimage-forming light, concentrated or diffuse, that is transmitted through the lens to the image. It is frequently the result of reflections from lens surfaces, a lens barrel, shutter or lens mount.

flash digitizer -> analog-to-digital converter

A device that converts an analog signal, that is, a signal in the form of a continuously variable voltage or current, to a digital signal in the form of bits.

flash photographic density filter

A filter, partially opaque to near-ultraviolet, visible and infrared radiation, that may be made by exposing and processing photographic film. Such materials are almost equally opaque to radiation of...

flash photolysis

A spectroscopic technique used in the detection of free radicals by virtue of their electronic spectra. In this method, an intense light flash is used to form extensive photolysis and yield a high...

flash radiography

A technique used in radiography to obtain an unblurred image of a moving object by the use of very short x-ray exposures, such as one microsecond, to record the image.

flash sensitometer

A sensitometer that utilizes an electronic flashtube or a photoflash lamp as both the light source and the shutter for obtaining short-duration exposures.

flash spectroscopy

The study and interpretation of the spectra of substances after they have absorbed the radiant energy emitted by a brief, intense light source.

flashback voltage

The inverse peak voltage that produces ionization in a gas tube.

flasher

A device that is designed to automatically turn electric lamps on and off in a rapidly repeating sequence. The device may use a motor-driven mechanism or a combination heater filament and bimetallic...

flashlamp

A device that converts stored electrical energy into light by means of a sudden electrical discharge.

flashlamp-pumped dye laser

A pulsed dye laser in which the excitation is provided by means of a flashlamp. Output is tunable from 335 to 850 nm, with peak power up to 7000 kW.

flashtube -> electronic flash unit

A small xenon-filled tube with metal electrodes fused into the ends. The gas flashes brilliantly when a condenser is discharged through the tube. The duration of the flash is primarily dependent upon...

flat -> optical flat

A piece of glass, pyrex or quartz having one or both surfaces carefully ground and polished plano, generally flat to less than a tenth of a wavelength. Optical flats are used in surface testing to...

flat blank

A piece of glass having a crude plano surface on each side.

flat machine

A polishing machine designed to permit adjustment of the polisher speed and motion for the control of flat surfaces.

flat optical-quality mirrors

Flat optical-quality mirrors are highly precise reflective surfaces used in various optical applications where the quality and accuracy of the reflection are paramount. These mirrors are designed to...

flat pack

A slab-shaped, very low profile package for electronic components; often used when printed circuit boards must be closely stacked together.

flat panel display

An electronic display in which a flat screen is formed by an orthogonal array of display devices, such as electroluminescent devices, light-emitting diodes or liquid crystal cells.

flat-field frame

A frame taken with a CCD camera of a surface that is evenly illuminated by diffuse light. This frame shows irregularities in the light-sensing ability of the CCD, such as electronic defects and dust...

flat-field lens

A lens that focuses on a flat plane because its field of curvature is close to zero.

flatbed scanner

An imaging device analogous to a drum scanner, but operating at greater speeds; it uses a row of sensors to traverse an image affixed to a flat surface.

FLC

ferroelectric liquid crystal

FLD

Fraunhofer line depth

flexible display

A flexible display refers to a type of electronic visual display that is designed to be bendable, foldable, or rollable, allowing for unconventional form factors and enhanced portability. Unlike...

flexible imagescope -> fiberscope

An optical instrument consisting of an objective lens, a coherent (usually flexible) fiber bundle and an eyepiece to examine the output of the fiber bundle.

flicker

The fluctuation in apparent illumination that has a rate comparable to the reciprocal of the period of persistence in vision.

flicker noise

Any noise with a power spectral density that is the inverse of the signal's frequency and is therefore most significant for low-frequency signals. It can be expressed as 1/f and is therefore also...

flicker photometer

A bench photometer that depends on the inability of the eye to distinguish color in brief flashes of light. Any difference in the intensity of reflected colored samples, presented to the observer in...

flicker photometry

Heterochromatic photometry that depends on the elimination of chromatic flicker at a lower frequency than luminance flicker.

flight path deviation indicator

An instrument designed to give a visual indication to the pilot when the plane has strayed from a specific flight path.

FLIM

fluorescence lifetime imaging microscopy

flint glass

One of the two major types of optical glass, the other being crown glass. Flint glass is softer than crown glass, has a higher dispersion and usually a higher refractive index.

FLIP

floating index point; floating point interpretive program

flip chip

An optical switch that controls conduction paths into and out of a junction in fiber optic and integrated optical circuits.

Photonics Dictionary

Need Help?