Grating HD 1800 l/mm @ 840 nm

  • 49.1° AOI  | 790–890 nm wavelength range
  • High first-order diffraction efficiency across the full spectral band
  • Low scatter, AR coating and low polarization dependence
  • Robust, durable design for easy cleaning, handling and alignment

Dimensions

25.4 mm, 3 mm thick | 50.8 mm, 6 mm thick
Part #
WP-HD1800/840-25.4 | WP-HD1800/840-50.8
Wavelength Range

790–890 nm

Surface Quality

60–40 scratch-dig

Diffracted Wavefront
< λ/5 rms @ 632.8 nm over a 1″ diameter
Spatial Frequency

1800 l/mm ± 1 l/mm

CWL
840 nm
Angle of Incidence (AOI)
49.1° @ 840 nm
Thickness Tolerance

± 0.25 mm

Dimensional Tolerance

+0 / -0.15 mm

AR Coating
Optimized for the specified wavelength range and AOI
Substrate & Cover Glass
1.5 mm BK7 (3 mm total thickness) | 3 mm BK7 (6 mm total thickness)
Clear Aperture
20 mm | 45 mm

The diffraction efficiency and the angle of diffraction as a function of wavelength for this online shop grating are:

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