Standard Plane Blazed Holographic Gratings
- The grating grooves are formed by a holographic exposure method where the two-laser-beam-interference technology is applied. This holographic method lowers groove's periodical error commonly found in mechanically ruled gratings and ensures that the low stray light gratings can be produced.
- Blaze angle is formed by an ion-beam etching technology , which easily makes blazed holographic gratings with various angles (blaze wavelengths).
- High groove density and high resolution gratings can be manufactured easily and at competitive price.
Shape of Plane Gratings
|Grating Type||Equally spaced straight-groove replica trating *1|
|Blank material||Soda glass|
Width(W) and hegiht (H) of rectangular blanks
Diameter(Φ) of round 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.