Essentially, a hologram of a hologram, in which the first-generation hologram is masked with a narrow slit. During image reconstruction, the slit operates as the exit pupil in image space. The hologram's white-light exit pupil is spread out to form...

A spectrometer that uses a grating to diffract light into specific wavelengths.

A grating with ridges of rectangular cross section, generally equal in width to the space between. This type of grating may...

The mounting of a concave diffraction grating and a plate holder at the ends of a rigid bar. The ends follow separate...

A form of monochromator optical system consisting of two spherical concave mirrors used in conjunction with a movable...

A transparent plate ruled with black lines and equal, clear spaces. It is used as a multiple knife-edge for testing a...

A two- or three-dimensional space grating formed when ultrasonic beams with varied paths of propagation intersect.

In spectroscopy, the false images arranged symmetrically on both sides of the true line and caused by irregularities in the...

An automatic scanning instrument that is used to study a substance's fluorescence over a wide range of wavelengths. It...

An interferometric technique for the generation of precision gratings that allows for sequential exposure of small segments...

1.) Generally, the electromagnetic spectrum within the wavelength region extending from the vacuum ultraviolet at 40 nm to...

A spectrograph that uses a diffraction grating as its dispersive element in place of a prism, and yields greater resolving...

A laser whose pulses are expanded, using gratings and optical fibers, before amplification and compressed to increase beam...

A grating used as a reflectance filter, particularly in the far-infrared. Small plane gratings, blazed for the wavelength of...

A hyperspectral imaging camera is a sophisticated imaging device capable of capturing and processing data across a wide...

A filter that separates light into many colors via Bragg's law. Generally refers to a fiber Bragg grating used in optical...

A Dammann grating is a type of diffractive optical element (DOE) used to create an array of equally spaced,...

A superthin, highly reflective mirror.

A diffraction grating with lines and grooves formed so as to concentrate the radiation of a particular wavelength into one...

A transmission or reflecting grating with a flat or plane surface requiring a lens or concave mirror to focus the spectrum.

Optical elements that use diffraction to control wavefronts. Diffractive optical elements include diffraction gratings,...

A device similar to distributed feedback lasers in construction and operation, but in which the period grating that produces...

A system used for gratings that consists of a concave mirror, a grating and a plate holder mounted normal to the grating to...

In optics and photolithography, a phase mask refers to a device that modifies the phase of light waves passing through it....

A fiber laser is a type of laser in which the active gain medium is an optical fiber doped with rare-earth ions such as...

An instrument that contains a spectrograph with a grating in which an array of slits, in place of a photographic plate, is...

A diffraction grating is an optical component consisting of a surface with a periodic structure of equally spaced, parallel...

A broadband continuum resonator that confines a wide range of wavelengths. From the optical confinement a single wavelength...

A reflecting grating ruled on a concave spherical surface that not only disperses the light but focuses the spectrum. The...

The technique of producing spectrograms in wavelengths beyond 120 nm by the use of a diffraction grating and a Schumann...

The substrate upon which a diffraction grating will be ruled. It must be dimensionally stable, and the surface must be...

A contour mapping technique that uses electronic scanning and sampling techniques instead of a reference grating (see moire...

A reproduction made of an original grating -- usually by casting thermosetting plastics onto the original -- to avoid the...

A monochromator is an optical instrument used to isolate and select a narrow range of wavelengths from a broader spectrum of...

1. A faint second image caused by reflection that is sometimes seen when observing through an optical instrument. 2. With...

The separate spectral lines formed by a diffraction grating that are characterized by one wavelength difference in path...

Freeform mirrors refer to reflective optical components that deviate from traditional symmetric or rotationally symmetric...

A fiber optic sensor is a device that uses optical fibers to detect and measure physical, chemical, biological, or...

The study of the quality of the image formed on the retina by the measurement of the flux reflected from the eye when the...

1. Synonymous with radioactivity. The intensity of a radioactive source illustrated as the number of atoms disintegrating in...

The generation of a grating on a concave spherical blank by the holographic process. In this way, ghost images and intense...

A means of achieving higher peak powers and more efficient harmonic generation by narrowing the pulse width and thus...

A method of analysis in which a pulsed laser beam is used to heat a particle, producing a plasma, or laser spark. As the...

A lithography method that allows the transfer of fine-pitch gratings from a phase mask into photoresist. The exposure takes...

A device for measuring diffraction grating efficiency at any angle of incidence, consisting of a reflectometer wherein the...

A grating in which the wires or rods are set radially within a circular structure.

The angular spectrum approach is a mathematical and computational technique used in the field of optics to analyze and...

A grating with very coarse rulings to match the long wavelengths in the far-infrared region. In the most efficient ruling...

An optical interference technique widely utilized as a method of nondestructive testing when determining the ray deflection...

Computation of tristimulus values by integrating or summing, over the visible wavelength region, the product of the relative...

A device used in ultrasonic imaging to measure the velocity and attenuation of compressional waves in a transparent liquid...

A reflection grating is an optical component that consists of a series of closely spaced, parallel reflecting surfaces or...

A type of internal photonic connection in an integrated circuit in which a holographic grating is used to focus light at...

Micro-optics refers to the design, fabrication, and application of optical components and systems at a microscale level....

A system that uses a continuous-wave laser to measure the velocity of an object by focusing the laser beam on the object,...

A grating that serves to provide higher resolution and dispersion than the average grating, and still has a greater free...

More efficient than the Foucault knife-edge test, this test examines curved mirrors by using a transmission grating with 40...

A spectroscope having a diffraction grating for the resolution of light of various wavelengths.

A polyethylene grating that transmits the long wavelengths and diffracts shorter wavelengths in controlled directions.

The space between diffracting centers of an ultrasonic wave that is forming certain light diffraction spectra.

Used in halftone screens to change the fundamental sampled spatial frequency of the halftoned picture, as well as varying...

A technique used in integrated optics where a groove is cut on a substrate surface and covered by a thin film to facilitate...

A fiber Bragg grating (FBG) is a type of optical filter that is inscribed or "written" into the core of an optical fiber. It...

1. A plane that forms one side of the groove ruled on a diffraction grating. 2. To form the individual grooves of a grating...

A holographic grating is a type of diffraction grating that is produced using holographic recording techniques. It consists...

GaN (gallium nitride) distributed feedback (DFB) lasers refer to a specific type of semiconductor laser based on Gallium...

A grating beamsplitter is an optical device that utilizes the principles of diffraction to split a beam of light into...

The first-order spectrum formed by a diffraction grating.

Contour mapping technique that involves positioning a grating close to an object and observing its shadow on the object...

Optical design software refers to specialized computer programs used by optical engineers, physicists, and designers to...

A grating that specularly reflects the specified long radiation wavelengths and diffracts the shorter wavelengths off in...

An optical grating, in the context of optics and physics, refers to a device with a periodic structure of closely spaced,...

An optical instrument for forming the spectrum of a light source and recording it on a film. The dispersing medium may be a...

A distributed feedback laser (DFB laser) is a type of semiconductor laser diode designed to emit coherent, narrow-bandwidth...

When, for example, a beam of monochromatic light passes through a diffraction grating, the emergent rays that have remained...

A mounting used for large concave gratings, whereby the slit, grating and plate holder lie in the Rowland circle, and the...

A computer-generated, phase-and-amplitude, off-axis hologram made by a multi-exposure technique that uses three computer...

A specialized form of diffraction grating consisting of assembled glass plates of equal thickness that resemble a flight of...

Blaze height typically refers to a parameter in the context of diffraction gratings, which are optical devices consisting of...

An optical instrument used to isolate a narrow bandwidth of optical radiation using a diffraction grating as the dispersive...

The process whereby white light is separated into its component wavelengths. Light beams of different wavelengths are...

Diffraction efficiency is a measure of how effectively a diffractive optical element (DOE) or diffraction grating directs...

A coarse diffraction grating that is used to form a scale of intensities to determine the relative magnitudes of stars. The...

A crystal that may serve as a diffraction grating if mounted effectively.

A three-dimensional grating designed with thin metal sheets to remain opaque to all but one specific and predetermined wave.

The method of disintegrating the substance of the cathode by bombarding it with ions and depositing it on another electrode...

A transparent diffraction grating that serves to transmit light.

The bending of x-rays by the regular layers of molecules in a crystal acting like a very small diffraction grating. The...

The entrance slit, also known simply as the slit, is an essential component in optical instruments such as spectrometers and...

The circle that contains the slit, grating and primary astigmatic focus of a concave diffraction grating.

Chirped pulse amplification (CPA) is a technique used in laser physics to amplify ultrashort laser pulses to high energies...

The generation of a grating on a flat surface by means of a series of interference fringes formed by a holographic process....

Any of a number of instruments that uses a flame to vaporize a solution of the chemical being analyzed so that light may be...

The resulting interference pattern generated from moiré deflectometry, the moiré pattern is a pattern...

A contour mapping technique that involves projection of a grating onto an object to produce a shadow grating that is...

A framework or latticework having an even arrangement of rods, or any other long narrow objects with interstices between...

A spectrophotometer having a prism or, more frequently, a grating for the study and recording of infrared spectra. It...

In an astigmatic grating, the image of the entrance slit located at the primary focus.

A specific, right-angle prism having a transmission grating replicated on its hypotenuse face and used in applications...

Spectrometric analysis of the distinct and characteristic spectra of atoms of elements. The atoms are energized to emit...

A shallow, fine-pitch diffraction grating having a precise dielectric overcoating that experimentally has absorbed...

A hollow sphere coated internally with a white diffusing material and provided with openings for incident beam, specimen and...

A fiber optic spectrometer is a device used for measuring the spectral content of light. It utilizes optical fibers to...

A bulk crystalline optic which permits the propagation of light through a volume of index altered material. The variation in...