Grating
Grating is an optical element composed of a series of equidistant parallel scribe lines. It is a dispersion element that uses the principle of light diffraction and interference to split light. It is widely used in biochemical instruments, spectroscopic instruments, spectrophotometers and other related products. or related fields. There are two types of gratings: transmissive and reflective. Reflective gratings are often applied to spectrometers. Each equal-width and parallel groove acts as an optical slit. There are 1200, 1800, and 2400 lines per millimeter. Wait, there will be hundreds of thousands of reticles on the whole grating, which will effectively split the light. In the general reflective grating, because the main pole of the zero-order diffraction without dispersion ability in the grating diffraction occupies 80% of the diffracted light intensity, the light intensity becomes weaker with the increase of the main pole, so the line groove is carved into a zigzag shape. It has the ability of directional blazing, so that the ability can be concentrated and distributed in the required wavelength range. From the production method, it can be divided into ruled grating and holographic grating. The ruled grating is made by marking the reflective surface with a marking machine, while the holographic grating is made by laser interference photography. Shanghai Optics provides various types of transmission gratings, planar diffraction ruled gratings and planar holographic gratings.
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Overview
Specifications
| Parameter | Value |
|---|---|
| Material | UV Fused Silica, B270, Float Glass |
| size | 12.7*12.7*2;25*25*2;50*50*2 |
| Dimensional tolerance | ±0 . 5mm |
| Thickness Tolerance | ±0 . 2mm |
| Effective aperture | >90% |
| surface finish | 60/40 |
| Number of lines | 60-4000 |
| Shine corner | 2︒-40︒ |
Datasheet
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