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)|
|*1||:||The grating grooves are formed with resin.|
|*2||:||The (T)3mm product has the edge chipping because it has cut it with the dicing equipment.|
|*3||:||Nominal blaze wavelength λB(Litt) is the wavelength of the maximum diffraction efficiency with the design in littrow mounting. No one to guarantee the wavelength of the maximum diffraction efficiency.|
The external appearances and specifications are subject to change without notice.
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.
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