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Grating Links Catalogue Definitions Specifications Equations OEM Links OEM Products Gratings Spectrographs Monochromators Detectors Assemblies Design VUV Links Monochromators & Spectrographs Synchrotron Beamline Mirrors & Gratings Table 10, VUV Toroidal Monochromator Gratings (TGM) The manufacturing of monochromators or spectrographs designed for far UV and soft X-Ray necessitates the use of diffraction gratings at grazing incidence (better efficiency of the reflection power of coatings). But the considerable astigmatism of concave gratings at grazing incidence gives very low energy throughput. The holographic gratings on a toroidal blank can be corrected for astigmatism and coma and so permit to increase drastically the throughput and still have a very good resolution. VUV TOROIDAL MONOCHROMATOR GRATINGS (TGM) Dev. (deg) Spect. Range (in AU) Spect. Range (in eV) Grooves per mm Res. (AU) Size (mm) h x w x t LA (mm) LB (mm) Ion Etched Ref. No. 172 18-27 690-460 1800 0.007 45x160x30 2927 7045 540 01 300 172 27-40 460-310 1200 0.011 45x160x30 2927 7045 540 01 310 172 40-60 310-207 800 0.016 45x160x30 2927 7045 540 01 320 166 30-100 413-124 600 0.05 50x210x45 2961 4332 540 00 100 166 100-333 124-37 180 0.17 50x210x45 2961 4332 540 00 110 162 40-120 310-100 1800 0.12 30x90x20 1000 1415 540 00 200 162 120-360 100-35 600 0.36 30x90 x20 1000 1415 540 00 210 162 360-1000 35-12 200 1.1 30x90x20 1000 1415 540 00 220 162 60-180 207-69 1800 0.32 35x150x25 1500 2634 540 01 100 162 90-270 138-46 1200 0.5 35x150x25 1500 2634 540 01 130 162 180-540 69-23 600 0.95 35x150x25 1500 2634 540 01 110 162 540-1620 23-8 200 2.84 35x150x25 1500 2634 540 01 120 161 60-200 207-62 1200 0.24 30x100x30 880.4 1127 540 00 400 161 200-800 62-16 450 0.80 30x100x30 880.4 1127 540 00 410 160 50-105 248-118 3000 0.08 30x135x30 2166 3493 540 00 300 160 60-120 207-103 2250 0.07 30x135x30 2166 3493 540 00 330 160 100-210 124-59 1500 0.16 30x135x30 2166 3493 540 00 310 160 200-420 69-29 750 0.31 30x135x30 2166 3493 540 00 320 160 70-175 177-71 2400 0.06 45x135x30 2112 3888 540 01 200 160 175-500 71-25 823 0.17 45x135x30 2112 3888 540 01 210 160 500-1415 25-9 288 0.50 45x135x30 2112 3888 540 01 220 150 125-300 100-41 2400 0.09 20x120x25 888.5 1663 540 00 500 150 166-400 75-31 1800 0.12 20x120x25 888.5 1663 540 00 530 150 250-600 50-20 1200 0.18 20x120x25 888.5 1663 540 00 510 150 500-1200 25-10 600 0.36 20x120x25 888.5 1663 540 00 520 150 80-320 155-39 1800 0.35 45x90x30 1146 1927 540 00 600 150 320-1280 39-10 450 1.40 45x90x30 1146 1927 540 00 610 146 125-525 100-23 950 0.58 30x110x30 1000 1168 540 00 800 146 500-2000 25-6 250 2.19 30x110x30 1000 1168 540 00 810 142 100-500 124-25 550 2.8 31x31x15 319.9 319.5 540 00 900 142 150-1500 82-8 550 5.7 31x31x15 319.9 319.5 540 00 910 142 500-3000 25-4 275 12.2 31x31x15 319.9 319.5 540 00 920

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