Astronomy With Diffraction Gratings
Astronomy With Diffraction Gratings
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 |