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Alluxa - Optical Coatings LB 8/23
Fresnel Dictionary Terms

Fresnel fringe
A single band in a group of light and dark bands that can be viewed in the periphery of Fresnel diffraction shadow.
Fourier images
The series of images formed when periodic objects are exposed to collimated monochromatic radiation and that result from...
Fresnel reflection
Fresnel reflection refers to the reflection of light at the interface between two different media with different refractive...
himawari
A system of Japanese origin that utilizes Fresnel lenses and a fiber optic network to transmit sunlight to otherwise...
quadratic phase terms
Conceptual formulas that characterize both the transmittance functions of lenses and propagation in the Fresnel zone.
surface reflection
Also known as Fresnel reflection. That portion of the incident radiation that is reflected from the surface of a refractive...
Arago spot
A bright spot or point, due to Fresnel diffraction, that appears at the center of the shadow of a circular object in light...
near-field region
The area closest to an aperture or source where the diffraction pattern differs substantially from that observed at an...
Fresnel lens
A Fresnel lens is a type of optical lens that consists of a series of concentric grooves or steps carved into a flat, thin...
index-matching material
A material, often a liquid or cement, whose refractive index is nearly equal to the fiber's core index, used to reduce...
modulated zone plate
A zone plate produced by a computer and having a binary structure that can be etched into a chromium or quartz layer. It...
microphotonics
The technology of manipulating light on a micro scale. In optical communications, this is usually accomplished using two or...
field lens
1. A lens situated at or near the plane of an internal image to project the aperture of a previous objective or erector upon...
Fresnel hologram
A hologram formed with an object located close to the recording medium.
Fresnel rhomb
A type of quarter-wave retarder in the form of a glass rhomb; light entering the retarder undergoes two total internal...
Fresnel reflection method
A method for measuring the index profile of an optical fiber by measuring the reflectance as a function of position on the...
Fresnel reflection loss
Reflection losses incurred at input and output of optical elements because of the difference in refractive index between...
fresnel
A unit of frequency equivalent to 1012 cps. Named for Augustin Jean Fresnel, a French physicist known for his work in light...
Fresnel zone plate
A zone plate in which the zones are alternately transparent and opaque to specific radiation, and coarse enough so that no...
Fresnel diffraction
1. Also known as near-field diffraction. The field of radiation sent through an aperture in an absorbing screen at large...
Fresnel loss
 Fresnel mirrors
Two plane mirrors that are not wholly located in the same plane. When light from a point source or slit reflects from the...
Fresnel number
In a lens, the square of the radius of its aperture divided by the product of the focal length and the wavelength. It...
scalar diffraction theory
Scalar diffraction theory is a simplified approach used to describe the propagation of electromagnetic waves, particularly...
unstable resonator
A resonator often used for mode control in Fresnel number laser cavities that is highly vulnerable to extremely weak...
overhead projector
A projector used to project transparencies. A horizontal 8 x 10-in. stage for writing or laying down preformed...

(26 results found)

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