Customized Gratings

Diffraction gratings of special specifications can also be manufactured on request.

Material

Pyrex glass is used as a standard material. Hitachi is also prepared to use materials other than Pyrex glass when specified.

Coating

Diffraction gratings are coated with aluminum (Al) as a standard. Hitachi will coat the gratings with gold (Au) and platinum (Pt) as special specifications.

Diffraction gratings with Part No. 001-0450 and 001-0437 exceptionally are coated with gold (Au) as a standard.

Overcoating

Diffraction gratings are overcoated with magnesium fluoride 

(MgF2) or lithium fluoride (LiF) as special specifications.

Dimensions

Diffraction gratings are manufactured to dimensions other than specified in this catalog. They can also be shaped round.

Certificate

For certifying the groove profile, an electron micrograph can be provided together with the manufactured diffraction grating at the expense of the customer.