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Reflective Holographic Gratings

Reflective Holographic Gratings

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  • Groove Density up to 3600 Grooves per mm
  • Bare Aluminum Coating
  • Sinusoidal Grating Profile
  • Available Wavelength Range of 250 - 1500nm

Holographic gratings are formed by an interference fringe field of two laser beams whose standing wave pattern is exposed to a polished substrate coated with photoresist. Processing of the exposed medium results in a pattern of straight lines with a sinusoidal cross section.

Holographic gratings produce less stray light than ruled gratings. They can also be produced with up to 3600 grooves per millimeter for greater theoretical resolving power. Due to their sinusoidal cross section, holographic gratings cannot be easily blazed and their efficiency is usually considerably less than a comparable ruled grating. There are, however, special exceptions which should be noted. When groove spacing to wavelength ratio is near one, a holographic grating has virtually the same efficiency as the ruled version. Also, a holographic grating with 1800 grooves per millimeter has the same efficiency at 500nm as a blazed ruled grating. Holographic master gratings are replicated by a process identical to that used for ruled gratings.

Handling Gratings: Gratings require special handling, making them prone to fingerprints and aerosols. Gratings should only be handled by the edges. Before attempting to clean a grating, please contact us.

Common Specifications

Construction:
Holographic Grating
Alignment of Grooves to Edge (°):
±0.5
Coating:
Bare Aluminum
Substrate:
Float Glass

Products

 Groove Density (grooves/mm)   Wavelength   Wavelength Range (nm)   Dimensions (mm)   Compare  Stock Number  Price Buy
1200 VIS 400 - 700 12.5 x 25.0
1800 UV 250 - 400 12.5 x 25.0
1800 VIS 400 - 700 12.5 x 25.0
2400 VIS 400 - 700 12.5 x 25.0
3600 UV 250 - 400 12.5 x 25.0
1200 UV 250 - 400 12.7 x 12.7
1200 VIS 400 - 700 12.7 x 12.7
1800 UV 250 - 400 12.7 x 12.7
1800 VIS 400 - 700 12.7 x 12.7
2400 UV 250 - 400 12.7 x 12.7
2400 VIS 400 - 700 12.7 x 12.7
3600 UV 250 - 400 12.7 x 12.7
2400 VIS 400 - 700 25.0 x 25.0
1800 VIS 400 - 700 25.0 x 25.0
1800 UV 250 - 400 25.0 x 25.0
1200 VIS 400 - 700 25.0 x 25.0
3600 UV 250 - 400 25.0 x 25.0
1200 VIS 400 - 700 30.0 x 30.0
1800 VIS 400 - 700 30.0 x 30.0
2400 VIS 400 - 700 30.0 x 30.0
1200 UV 250 - 400 50.0 x 50.0
1200 VIS 400 - 700 50.0 x 50.0
1800 UV 250 - 400 50.0 x 50.0
1800 VIS 400 - 700 50.0 x 50.0
2400 VIS 400 - 700 50.0 x 50.0
1200 UV 250 - 400 25.0 x 25.0
1800 UV 250 - 400 30.0 x 30.0
2400 UV 250 - 400 25.0 x 25.0
2400 UV 250 - 400 30.0 x 30.0
3600 UV 250 - 400 50.0 x 50.0

Technical Information

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Resources

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Absolute Efficiency

Blaze Angle

Blaze Wavelength

Diffraction

Diffraction Grating

Grating Equation

Groove Density

Holographic Grating

Nth Order

Relative Efficiency

Ruled Grating

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