Flat Field Concave Gratings
Spectrum Scientific’s flat field imaging concave gratings have grooves that are neither parallel nor equidistant. This type of concave grating is designed to minimize astigmatism and coma. This makes an aberration corrected concave grating ideal for use with planar array detectors such as photo diode arrays (PDA) or 2D array detectors such as charge coupled device (CCD) detectors. The imaging properties of the grating also means that multiple sources – such as fibre inputs – can be imaged simultaneously onto the entrance slit and each signal read out separately onto a 2D detector or a number of stacked array detectors.
Spectrum Scientific is one of the few companies in the world capable of manufacturing high quality blazed holographic concave gratings. Our proprietary technique allows us to optically blaze concave gratings without ion-etching which results in high peak efficiency and low stray light
Spectrum Scientific offers a range of standard gratings. If we do not have a grating that meets your specification, please contact our sales team to discuss your specific requirements.
Product Groove Density (g/mm)
Product Wavelength of Peak Efficiency (nm)
Product Wavelength Range (nm)
Product Coating
Product Dimensions (mm)
Product Lead Time
Product Apex Distance (inches)
Product Beam Deviation (arcsec)
Product Blaze Wavelength (nm)
Product Clear Aperture (mm)
Product Clear Aperture (%)
Product Deflection Angle (deg)
Product Deviation Angle (deg)
Product Dia. (mm)
Product Dispersion (nm/mm)
Product Effective Fl (mm)
Product F Nbr
Product Lα (mm)
Product Lβ (mm)
Product Parent Fl (mm)
Product Peak Efficiency (%)
Product Size (mm)
Product Spectrum Length (mm)
Product Substrate
Product Surface Accuracy
Please complete our Request Information form or contact our sales team to discuss your specific requirements.