Edmund Optics Inc. 1800 Grooves/mm, UV Holographic Grating, 12.5mm x 25mm NT43-218

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Barrington, NJ, USA
1800 Grooves/mm, UV Holographic Grating, 12.5mm x 25mm
NT43-218
1800 Grooves/mm, UV Holographic Grating, 12.5mm x 25mm NT43-218
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 photo resist. 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.

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 photo resist. 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.

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Technical Specifications

  Edmund Optics Inc.
Product Category Diffraction Gratings
Product Number NT43-218
Product Name 1800 Grooves/mm, UV Holographic Grating, 12.5mm x 25mm
Grating Type Holographic
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