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# About

About

The left table allows to select gratings from the catalogs according to several criteria described below.

supplier

Allows to select a gratings supplier. Obviously. When "All" is selected, this criterion is not taken into account in the selection.

type

Defines the type of gratings to be selected. If "All" is selected, this criterion is not taken into account.

Actually, the proposed gratings are reflective and are either ruled or holographic. The type is resuming the corresponding type given on the supplier website.

ref.

This is the reference of the grating on the supplier website. If this cell is empty, this criterion is obviously not taken into account.

min. lines/mm

This is the minimum number of lines per mm required. If this cell is empty, this criterion is obviously not taken into account.

max. lines/mm

This is the maximum number of lines per mm required. If this cell is empty, this criterion is obviously not taken into account.

min. Blaz wave.

This is the minimum value in microns of Blaze wavelength required. If this cell is empty, this criterion is obviously not taken into account.

max. Blaz wave.

This is the maximum value in microns of Blaze wavelength required. If this cell is empty, this criterion is obviously not taken into account.

min. Blaz wave.

This is the minimum value in degrees of Blaze angle required. If this cell is empty, this criterion is obviously not taken into account.

max. Blaz wave.

This is the maximum value in degrees of Blaze angle required. If this cell is empty, this criterion is obviously not taken into account.

The results are displayed in a table at the right of the selection table.

The results table columns are the following:

ref.

Displays the grating reference. The supplier web page relevant to the reference can be reached by clicking on it.

supplier

Displays the supplier name.

type

Displays the grating type. It is a resume of the type of the corresponding reference provided on the supplier website.

lines/mm

Displays the number of lines per mm.

Blaz. ang.

Displays the Blaze angle value in degrees.

Blaz. wave.

Displays the Blaze wavelength value in microns.

aper. para.

Displays the size in mm of the grating in the direction parallel to the grooves.

aper. perp.

Displays the size in mm of the grating in the direction perpendicular to the grooves.