grating


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grating

(grāt′ing)
In spectrophotometry, the element used in a monochromator that disperses white light into the visible spectrum. It is composed of finely etched lines in the reflecting material.

grating

A series of black and white parallel bars of equal width used to measure visual acuity, contrast sensitivity, and resolution of optical systems. The grating can be either square-wave (also called Foucault grating or Foucault pattern), in which the luminance across a bar is constant, or sine-wave, in which the luminance varies sinusoidally (Fig. G6). See cycle per degree; contrast sensitivity function.
Fig. G6 Square-wave gratingenlarge picture
Fig. G6 Square-wave grating
References in periodicals archive ?
It can be seen from Figure 15, three-axis force distribution curves of resistance-strain gauges and Fiber Bragg Grating and theoretical values are within the same axial range, the relative error of resistance-strain gauge and Fiber Bragg Grating can be calculated as
The glass cover equipped with the grating on its top was deposited on a polysilicon solar cell with a glycerol layer between them acting as an index matcher.
The ''Global and Chinese AWG (Arrayed Waveguide Grating) Industry, 2016 Market Research Report'' is a professional and in-depth study on the current state of the global AWG (Arrayed Waveguide Grating) Market with a focus on the Chinese market.
"Our product ranger has also widened, so we're involved in all types of miscellaneous structural steel and steel grating for industrial projects under our scope of work."
Diffraction gratings are used by college students to study light wave phenomena, such as interference.
4B schematically shows an output grating 402b having three angularly multiplexed holographic recordings.
Due to the subwavelength nature of this grating, this configuration could be considered as a pseudo metamaterial with effective refractive index equal to the combination of the metal and LC refractive indices.
In spite of improvements in the design of cassava graters, there are no standards for the fabrication of grating surfaces and this affects interchangeability of the product.
After evaporating the acetone, a dried grating with spatially periodic template and nontemplate regions was obtained.
This is in accordance with the expression for [kappa]: if the grating's length ([L.sub.grating]) is very small, [kappa] must be high:
Fisher and Ludlow fabricates steel and aluminum bar grating products that are sold under the brand name Nucor Grating.
The new grating rig is used in conjunction with Stable Micro Systems' renowned TA.XTplus texture analyser and comprises a grating platform consisting of interchangeable grating faces, and a sample block holder which acts as a sample template and, during the test, holds the sample in place.