Plane Blazed Holographic Diffraction Gratings

For a list of our standard blazed holographic gratings and efficiency curves, please see our Grating List.

A blazed holographic diffraction grating is a diffraction grating where the sinusoidal profile has been transformed into a 'saw tooth' profile. This saw tooth profile increases the efficiency of the diffraction grating over the wavelength region of interest.

A blazed holographic diffraction grating offers the same high efficiency as a ruled diffraction grating, but as the optical technique used to manufacture a holographic diffraction grating does not produce periodic errors, spacing errors or surface irregularities, a holographic diffraction grating has significantly lower stray light and no ghosting when compared to a ruled grating.

A holographic diffraction grating can be blazed using a number of different methods. The proprietary technique used by Spectrum Scientific creates a blazed grating that demonstrates considerably less stray light when compared to an ion-etched blazed grating with equivalent or better efficiency (see SSI blazed grating vs ion-etched blazed grating).

Spectrum Scientific has also pioneered a proprietary method for blazing holographic diffraction gratings into the 325nm region. The result is a spectral efficiency curve that provides greater energy at the blaze region without adding stray light as commonly found in a ruled or ion etched diffraction grating.

Advantages of SSI Blazed Holographic Gratings

• Blazed using SSI's proprietary blazing technique
• Significantly lower stray light compared to ruled
  or ion-etched gratings
• High efficiency
• Reliable and proven replication method
• Repeatable performance from grating to grating

Spectrum Scientific offers a range of standard gratings. If we do not have a grating that meets your requirement, please contact our sales department as new gratings are manufactured on a regular basis.