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Vescent Photonics LLC - Lasers, Combs, Controls 4/15-5/15 LB
POC Dictionary Terms

pulsed welding
A type of laser welding that produces short-duration vapor pockets without buildup of heat in the part, useful for parts...
electron-beam evaporation
A method of thin-film deposition in which electrons boiled off a heated cathode are used to melt the coating material. If a...
longitudinal field modulator
Pockels cell or dynamic optical retarder in which the electrical field is applied in a direction parallel to that of light...
chromatic aberration
Chromatic aberration is an optical phenomenon that occurs when different wavelengths (colors) of light are refracted by a...
CoaXPress
CoaXPress (CoaXPress or CXP) is a standardized digital interface and communication protocol used primarily in machine vision...
fluorite objective
An objective that uses the mineral fluorite in its construction to reduce the secondary spectrum. It is usually intermediate...
Pockels cell
A Pockels cell, also known as an electro-optic modulator, is an optical device used to control the polarization of light by...
apochromat
An apochromat, often referred to as an apochromatic lens or apochromatic objective, is a type of optical system designed to...
modulator crystal
A nonlinear crystal used to modulate a polarized beam of light by means of the Pockels effect. A Pockels cell is used as a...
microscope objective
The lens located at the object end of a microscope tube. A wide range of objectives is available, including simple...
direct-vision pocket spectroscope
A small handheld instrument consisting of a slit and collimator that feeds light into a small direct-vision dispersing...
Pockels
In optics, the Pockels effect refers to the phenomenon where the refractive index of a material changes in response to an...
transverse field modulator
A Pockels cell in which electrical current is applied in a direction orthogonally to that of the light beam.
apochromatic system
An optical system that is corrected chromatically for three colors simultaneously.
process lens
A lens that is symmetrical and designed to work between 1:1 and about 4:1. It covers a field of about ±20° at f/8...
angular aperture
The angle between the most divergent rays that can pass through the lens to form an image. In a birefringent crystal light...
half-wave voltage
That voltage required across a Pockels, Kerr or other electro-optic light modulator to retard one polarization electrical...
achromat
An achromat, in the context of optics, refers to a type of lens or lens system designed to reduce chromatic aberration....
compensating eyepiece
A microscope eyepiece designed for use with apochromatic objectives. Since apochromatic objectives are undercorrected for...
optoelectronic shutter
A device used to control or block a light beam by means of the Kerr electro-optical effect, and other electro-optic devices...

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