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Reflective Concave Blazed Holographic Gratings

Reflective Concave Blazed Holographic Gratings
  • Ideal for Flat-Field and Imaging Applications
  • Aberration Corrected to Eliminate Astigmatism
  • Simplifies System Design by Eliminating Need for Other Image-Forming Optical Elements

Concave gratings accomplish the task of two optical elements in a single, easily integrated component. The gratings themselves are blazed holographic types, ensuring excellent efficiency and minimum stray-light, compared to standard blazed or holographic gratings. They are formed on precision concave substrates, allowing the grating to serve as both the primary dispersive element and the primary focusing element. This unique feature greatly simplifies system design and system integration, allowing for more compact and sensitive instrumentation.

Concave gratings are critical components in a variety of spectroscopic instrumentation. They are quite useful in analytical instruments, ranging from food analysis to plastics manufacturing and process quality assurance. They are also ideal for applications in optical communications, biotechnology, colorimetry, chromatography, and medical instrumentation.

The performance of these gratings is greatly enhanced by advanced design and manufacturing techniques used in their production. First, a holographic master grating is created by using the optimum exposure method for correcting aberrations, which includes an aspherical wave exposure interference technique. Then, a patented ion-beam etching technology is employed to create the standard “sawtooth” design common to ruled gratings, eliminating the periodic structure errors that cause stray light. This process creates aberration-corrected grooves that are neither equidistant nor parallel, ensuring near-perfect images of the entrance slit on the detector.


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Description Stock No. Price In Stock Qty
Showing 1-5 of 5 Items |  Sort by Spec
265 Grooves,200nm Concave Blazed Holographic Grating 25mmDia
#47-563 In Stock and Ready to Ship.
430 Grooves,240nm Concave Blazed Holographic Grating 25mmDia
#47-564 In Stock and Ready to Ship.
600 Grooves,450nm Concave Blazed Holographic Grating 30mm Sq
#47-565 In Stock and Ready to Ship.
780 Grooves,950nm Concave Blazed Holographic Grating 30mm Sq
#47-566 In Stock and Ready to Ship.
800 Grooves,450nm Concave Blazed Holographic Grating 30mm Sq
#47-567 Out of Stock. Click to Receive an Email with Delivery Details.
Dimensional References
Stock No. Wavelength Range λ 1 λ 2 (nm) Detector Length L (mm) Blaze Wavelength λB (nm) r (mm) a (deg.) r1 (mm) ß1 (deg.) r2 (mm) ß2 (deg.) ri (mm) ßi (deg.)
#47-563 190-800 25.1 200 147.4 6.50 150.8 -9.41 148.6 -18.97 148.6 -19.30
#47-564 190-800 24.5 240 86.4 6.00 89.4 -10.73 85.4 -26.65 85.3 -28.00
#47-565 380-740 36.9 450 150.0 20.00 171.4 -6.55 169.7 5.85 169.3 2.26
#47-566 850-1150 24.7 950 96.3 38.22 102.6 2.54 104.9 16.16 102.6 4.22
#47-567 340-750 37.0 450 86.3 0.00 85.9 -15.80 100.5 -36.90 83.9 -3.54
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