Ruled Diffraction Gratings 12.7x12.7x6mm 600Lines/mm Float Glass
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Product No. 378526
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- Size 12.7x12.7x6mm
- Groove Density 600Lines/mm
- Blaze Wavelength 400nm
- Blaze Angle 6°53'
- Chromatic Dispersion 1.66nm/mrad
- Substrate Material Float Glass
- Surface Quality 60-40
- Dimension Tolerance ±0.5mm
- Thickness Tolerance ±0.5mm
- Efficiency 60%~ 80% @Blaze Wavelength
- Clear Aperture 90%
- Damage Threshold 350mJ/cm² @200ns Pulsed Laser；40W/cm² （CW） Continuous Laser
- Genre UV~NIR Gratings
The initial step to make an original or master grating is to select the substrate material, usually usin glass or copper. The substrate material is polished to a high flatness and coated with very thin aluminum. The parallelism and equidistance of the grooves takes time to adjust. A few days is required to set up and test before engraving. The engraver must make sure the diamond knife head can return back in a precise way after each engraving and can engrave the substrate based on the quantity on schedule. The parallelism and displacement of the grooves must be precisely controlled. Engraving requires a series of tests. After testing passed, the original grating can be carved on a large substrate. The original grating is very expensive, so the grating can only be used limited until the replica grating is developed.
