Large Astronomical Diffraction Gratings

Through the use of diffraction gratings, the spectral content of light from outer space that reaches the Earth can be examined. This allows astronomers to determine amazing facts about the universe around us including the composition of stars and the movement of galaxies. Through these discoveries, we now know the age of the universe and know that it’s expanding. Spectroscopic analysis of distant objects is difficult due to the low intensity of the light that reaches our ground- or space-based telescopes. Selecting a grating of high efficiency and of sufficient size for the telescope is critical to success.

The gratings below are suitable for use in astronomical instrumentation and are listed in order of groove frequency, with the lowest blaze angle listed first. Blaze wavelengths listed are for the first-order Littrow configuration. The maximum ruled area is groove length x ruled width. Click on a Master Grating Code (last 4 digits of a grating's part number) below to view master grating efficiency curves. Use the request a quote to get a quote based on your requirements.

Master Grating Code Grooves per mm Nominal Blaze Wavelength Nominal Blaze Angle Maximum Ruled Area (mm) Request a Quote
109R 1000 460 nm 13.5° 230 x 260 Quote
147R 1000 330 nm 10.3° 230 x 260 Quote
461R 632 800 nm 14.7° 306 x 408 Quote
561R 632 1.2 μm 22.3° 306 x 408 Quote
571R 632 2.65 μm 57° 306 x 408 Quote
068R 600 620 nm 10.7° 308 x 408 Quote
083R 600 510 nm 9.5° 230 x 210 Quote
284R 480 500 nm 6.89° 156 x 212 Quote
601R 452 1.14 μm 15° 209 x 310 Quote
584R 400 415 nm 4.76° 306 x 408 Quote
505R 316 1.2 μm 11° 300 x 370 Quote
137R 316 870 nm 7.6° 308 x 414 Quote
181R 316 750 nm 6.8° 160 x 218 Quote
273R 270 533 nm 4.13° 306 x 408 Quote
271R 250 600 nm 4.5° 306 x 408 Quote
179R 245 4.85 μm 36.5° 158 x 208 Quote
349R 150 1.45 μm 6.2° 211 x 408 Quote
187E 124.93 770 nm 66° 154 x 206 Quote
232R 115 10.4 μm 36.8° 154 x 206 Quote
291E 91.7 All 58.9° 154 x 208 Quote
309R 90 1.9 μm 4.9° 212 x 408 Quote
215R 80 4.25 μm 9.8° 204 x 408 Quote
856R 75 4.6 μm 10° 210 x 260 Quote
275E 50.7 All 64.2° 154 x 306 Quote

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