Holographic Gratings 50x50x9.5mm 3600Lines/mm Float Glass

Holographic Gratings 50x50x9.5mm 3600Lines/mm Float Glass

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Product No. 379514

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Size 50x50x9.5mm
Groove Density 3600Lines/mm
Optimized Wavelength UV(UV)
Chromatic Dispersion 0.25nm/mrad@250nm
Substrate Material Float Glass
Surface Quality 60-40
Dimension Tolerance ±0.5mm
Thickness Tolerance ±0.5mm
Efficiency 45%~ 79% @ Peak Wavelength
Clear Aperture 90%
Damage Threshold 350mJ/cm²5 @200ns Pulsed Laser;40W/cm² (CW) Continuous Laser
Genre UV Gratings
Holographic gratings are commonly used in applications that are sensitive to stray light. The substrate is coated with photosensitive material. The substrate coated with photosensitive material is placed between the monochromatic light produced by the laser and the intersecting beam composed of coherent beams, which make the photosensitive material sensitize. The intersecting laser beam produces a series of parallel and equidistant interference fringes, whose intensity varies according to the shape of sinusoidal curve. Since the solubility of photosensitive materials is determined by the light intensity irradiated to them, interference fringes show different light intensity on the surface of photosensitive materials. We can coat a reflective coating on the substrate of holographic grating and use the same process to replicate that used for initial gratings. Because the shape and line spacing of holographic grating are uniform, the stray light is much less than ruled gratings. Usually holographic gratings can adopt profile of two concave grooves, sinusoidal and blazing.Gratings。全息Gratings可以采用两种凹槽轮廓,正弦和闪耀。
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