|Grating Type||Equally spaced straight-groove replica trating*1|
|Blank material||Soda glass|
|Configuration of dimension||Thickness : 3mm. Please refer the list of items regarding width and height.|
Width(W) and hegiht (H) of rectangular blanks
|Effective area||Total area less a 2mm strip around the perimeter|
|Groove density tolerance||±0.5 grooves/mm|
|Relative Diffraction efficiency at Blaze wavelength λ(Litt)*3||55% min.|
|Diffraction wavefront accuracy (λ=632.8nm, first-order light)||Within2λ|
|Coating (vacuum evaporation)||Aluminum (Aℓ)|
|Scratches and digs||80-50 (in accordance with MIL-O-13830A)|
The external appearances and specifications are subject to change without notice.
Be sure to prevent condensation as this can cause a significant deterioration of optical characteristics.
1 When you need special plane gratings other than our standard, please contact us or let us know by the following Request Form.
2 Holographic gratings (HG) can also be manufactured.