While choosing a device configuration it is important to select properly the diffraction gratings. A right selection of the diffraction grating allows one to obtain the best combination of high energetic efficiency and spectral resolution.

The basic grating parameters which determine their right choice you can find in the methodical material “Spectral Instrument. Basic Concepts and Characteristics.”

We propose a wide range of diffraction gratings to be used in the MS750 series monochromator-spectrographs. Please, choose a necessary grating from the given below list, or consult our specialists. Basic parameters for correct selection of diffraction gratings:

In the table “Selection of diffraction gratings” groove density and blaze wavelength belong to a diffraction grating parameters. Other parameters characterize a spectral device together with a selected grating.

• Groove density
The diffraction grating has a periodic structure. Such parameters as resolving power and free spectral range are determined by the periodic structure properties of a diffraction grating. The period of grating is the distance through which grooves are repeated. The reciprocal value of a grating period is called the groove density and displays the number of grooves in 1 mm.
• Blaze wavelength
The reflectivity of a grating depends on the grooves geometry, because the direction to the center of the diffraction maximum is determined by the mirror reflection of the incident beam from the edge of a groove. In spite of rather flat profile of diffraction maximum a blaze wavelength that corresponds to the maximum efficiency of the grating has been adopted as a feature for convenience of calculation. When selecting a grating it is useful to determine a blaze wavelength for a required grating on the spectral range of limited wavelengths WL1 and WL2. The blaze wavelength is determined by the ratio:
WLBlaze = 2 ∙ WL1 ∙ WL2 / (WL1 + WL2).
• Reciprocal linear dispersion
The light from a grating in the focal plane of a spectral instrument forms a spectrum. Linear dispersion is used for a spectrum characteristic, which is defined as a reciprocal value of the product of angular dispersion of a grating and focal length of a spectral instrument and shows the spectral range that falls on a single linear distance in a focal plane.
• The spectral resolution
Limiting resolution of a spectral instrument is equal to the minimum half-width of its instrument function. The instrument function is determined by finite sizes of entrance diaphragm, aberrations and also distortions caused by inaccuracy in manufacturing and adjustment of optical elements of instrument. In addition, instrument function, and thus spectral resolution are dependent on lighting method of entrance slit, used aperture and registration system parameters.
• Operating wavelength range
Energy efficiency range referred to the wavelength region in which grating reflection coefficient is not less than 0.405 of the maximum. In the first order this range is limited by the wavelengths: ⅔ ∙ WLBlaze and 2 ∙ WLBlaze.
Operating range usually corresponds to a grating energy efficiency. In some cases, for gratings with a high groove density and large blaze wavelength, the long-wave border of operating spectral range of instrument is limited by a maximal rotation angle of a grating which is defined by design of instrument.

Table for selection of diffraction gratings

ModelLine density, mm-1Blaze wavelength, nm*Reciprocal linear dispersion, nm/mmSpectral resolution, nmOperating wavelengths range, nmSpectral range limited by the grating rotation angle, nm
750.11 (wavelength 200 nm, 120 order)0.0024 (wavelength 200 nm, 120 order)
7836003600hol0.33**0.0064185 – 450500
78242224002250.520.01185 – 450750
78242724002700.510.01185 – 540750
78277024004000.470.009270 – 750750
78182718002700.70.014185 – 5401000
78184018004000.670.013270 – 8001000
78184018005000.630.012335 – 10001000
78187518007500.510.01500 – 10001000
78122512002501.080.021185 – 5001500
78122812002801.070.021190 – 5601500
78124012004001.050.021270 – 8001500
78125012005001.030.02335 – 10001500
781260120060010.02400 – 12001500
78127512007500.950.019500 – 15001500
7806236002302.190.043185 – 4603000
7806306003002.180.043200 – 6003000
7806406004002.170.043270 – 8003000
7806506005002.160.042335 – 10003000
7806606006002.140.042400 – 12003000
7806756007502.110.042500 – 15003000
78040084008003.230.06535 – 16004500
780401240012003.160.06800 – 24004500
780401740017003.030.061135 – 34004500
780402040020002.940.061335 – 40004500
780402540025002.750.061670 – 45004500
7803303003004.390.09200 – 6006000
7803353003504.390.09235 – 7006000
7803503005004.380.09335 – 10006000
7803603006004.370.09400 – 12006000
7803703007004.350.09470 – 14006000
780301030010004.310.08670 – 20006000
780301530015004.230.081000 – 30006000
780302030020004.110.081335 – 40006000
780303030030003.80.082000 – 60006000
780303530035003.590.082330 – 70006000
7802352003506.60.13235 – 7009000
7802402004006.60.13270 – 8009000
7802502005006.60.13335 – 10009000
7802702007006.60.13470 – 14009000
780201520015006.50.131000 – 30009000
780202020020006.40.131335 – 40009000
780202520025006.30.131670 – 50009000
780203020030006.20.122000 – 60009000
7815471504758.80.17320 – 95012000
7815701507008.80.17470 – 140012000
781503015030008.50.172000 – 600012000
781504515045008.10.163000 – 900012000
78016510065013.20.26435 – 130018000
78017010070013.20.26470 – 140018000
7801010100100013.20.26670 – 200018000
7801020100200013.10.261335 – 400018000
78010251002500130.261670 – 500018000
7801030100300012.90.262000 – 600018000
7801042100420012.70.252800 – 840018000
7801048100480012.60.253200 – 960018000
7801055100550012.50.253670 – 1100018000
7801062100620012.30.244130 – 1240018000
78010721007200120.244800 – 1440018000
7801088100875011.50.235830 – 1750018000
7801097100970011.10.226470 – 1800018000
78011031001030010.90.216870 – 1800018000
787507075700016.70.334670 – 1400024000
7875095759500160.326330 – 1900024000
785001050100026.40.52670 – 200036000
785003850380026.20.522530 – 760036000
785006350630025.80.514200 – 1260036000
785007050700025.70.514670 – 1400036000
785008350830025.50.55530 – 1660036000
7850124501240024.60.488270 – 2480036000
7850169501690023.20.4611270 – 3380036000
78502005020000220.4313330 – 3600036000
783702837.5280035.10.691870 – 560048000
783705637.5560034.80.693735 – 1120048000
783709337.5930034.30.686200 – 1860048000
783715637.515600330.6510400 – 3120048000
78241162411600541.17730 – 2320075000
7824144241440053.61.19600 – 2880075000
7824173241730053.11.111530 – 3460075000
7824243242430051.6116200 – 4860075000
7824285242850050.5119000 – 5700075000
7824325243250049.2121670 – 6500075000

Gratings with line density 75 mm-1

• Model: *reciprocal linear dispersion = 0.11 nm/mm (wavelength 200 nm, 120 order); spectral resolution = 0.0024 nm (wavelength 200 nm, 120 order).

Gratings with line density 3600 mm-1

• Model 783600: blaze wavelength = hol; *reciprocal linear dispersion = 0.33** nm/mm; spectral resolution = 0.0064 nm; operating wavelengths range = 185-450 nm; spectral range limited by the grating rotation angle = 500 nm.

Gratings with line density 2400 mm-1

• Model 782422: blaze wavelength = 225 nm; *reciprocal linear dispersion = 0.52 nm/mm; spectral resolution = 0.01 nm; operating wavelengths range = 185-450 nm; spectral range limited by the grating rotation angle = 750 nm.
• Model 782427: blaze wavelength = 270 nm; *reciprocal linear dispersion = 0.51 nm/mm; spectral resolution = 0.01 nm; operating wavelengths range = 185-540 nm; spectral range limited by the grating rotation angle = 750 nm.
• Model 782770: blaze wavelength = 400 nm; *reciprocal linear dispersion = 0.47 nm/mm; spectral resolution = 0.009 nm; operating wavelengths range = 270-750 nm; spectral range limited by the grating rotation angle = 750 nm.

Gratings with line density 1800 mm-1

• Model 781827: blaze wavelength = 270 nm; *reciprocal linear dispersion = 0.7 nm/mm; spectral resolution = 0.014 nm; operating wavelengths range = 185-540 nm; spectral range limited by the grating rotation angle = 1000 nm.
• Model 781840: blaze wavelength = 400 nm; *reciprocal linear dispersion = 0.67 nm/mm; spectral resolution = 0.013 nm; operating wavelengths range = 270-800 nm; spectral range limited by the grating rotation angle = 1000 nm.
• Model 781840: blaze wavelength = 500 nm; *reciprocal linear dispersion = 0.63 nm/mm; spectral resolution = 0.012 nm; operating wavelengths range = 335-1000 nm; spectral range limited by the grating rotation angle = 1000 nm.
• Model 781875: blaze wavelength = 750 nm; *reciprocal linear dispersion = 0.51 nm/mm; spectral resolution = 0.01 nm; operating wavelengths range = 500-1000 nm; spectral range limited by the grating rotation angle = 1000 nm.

Gratings with line density 1200 mm-1

• Model 781225: blaze wavelength = 250 nm; *reciprocal linear dispersion = 1.08 nm/mm; spectral resolution = 0.021 nm; operating wavelengths range = 185-500 nm; spectral range limited by the grating rotation angle = 1500 nm.
• Model 781228: blaze wavelength = 280 nm; *reciprocal linear dispersion = 1.07 nm/mm; spectral resolution = 0.021 nm; operating wavelengths range = 190-560 nm; spectral range limited by the grating rotation angle = 1500 nm.
• Model 781240: blaze wavelength = 400 nm; *reciprocal linear dispersion = 1.05 nm/mm; spectral resolution = 0.021 nm; operating wavelengths range = 270-800 nm; spectral range limited by the grating rotation angle = 1500 nm.
• Model 781250: blaze wavelength = 500 nm; *reciprocal linear dispersion = 1.03 nm/mm; spectral resolution = 0.02 nm; operating wavelengths range = 335-1000 nm; spectral range limited by the grating rotation angle = 1500 nm.
• Model 781260: blaze wavelength = 600 nm; *reciprocal linear dispersion = 1 nm/mm; spectral resolution = 0.02 nm; operating wavelengths range = 400-1200 nm; spectral range limited by the grating rotation angle = 1500 nm.
• Model 781275: blaze wavelength = 750 nm; *reciprocal linear dispersion = 0.95 nm/mm; spectral resolution = 0.019 nm; operating wavelengths range = 500-1500 nm; spectral range limited by the grating rotation angle = 1500 nm.

Gratings with line density 600 mm-1

• Model 780623: blaze wavelength = 230 nm; *reciprocal linear dispersion = 2.19 nm/mm; spectral resolution = 0.043 nm; operating wavelengths range = 185-460 nm; spectral range limited by the grating rotation angle = 3000 nm.
• Model 780630: blaze wavelength = 300 nm; *reciprocal linear dispersion = 2.18 nm/mm; spectral resolution = 0.043 nm; operating wavelengths range = 200-600 nm; spectral range limited by the grating rotation angle = 3000 nm.
• Model 780640: blaze wavelength = 400 nm; *reciprocal linear dispersion = 2.17 nm/mm; spectral resolution = 0.043 nm; operating wavelengths range = 270-800 nm; spectral range limited by the grating rotation angle = 3000 nm.
• Model 780650: blaze wavelength = 500 nm; *reciprocal linear dispersion = 2.16 nm/mm; spectral resolution = 0.042 nm; operating wavelengths range = 335-1000 nm; spectral range limited by the grating rotation angle = 3000 nm.
• Model 780660: blaze wavelength = 600 nm; *reciprocal linear dispersion = 2.14 nm/mm; spectral resolution = 0.042 nm; operating wavelengths range = 400-1200 nm; spectral range limited by the grating rotation angle = 3000 nm.
• Model 780675: blaze wavelength = 750 nm; *reciprocal linear dispersion = 2.11 nm/mm; spectral resolution = 0.042 nm; operating wavelengths range = 500-1500 nm; spectral range limited by the grating rotation angle = 3000 nm.

Gratings with line density 400 mm-1

• Model 7804008: blaze wavelength = 800 nm; *reciprocal linear dispersion = 3.23 nm/mm; spectral resolution = 0.06 nm; operating wavelengths range = 535-1600 nm; spectral range limited by the grating rotation angle = 4500 nm.
• Model 7804012: blaze wavelength = 1200 nm; *reciprocal linear dispersion = 3.16 nm/mm; spectral resolution = 0.06 nm; operating wavelengths range = 800-2400 nm; spectral range limited by the grating rotation angle = 4500 nm.
• Model 7804017: blaze wavelength = 1700 nm; *reciprocal linear dispersion = 3.03 nm/mm; spectral resolution = 0.06 nm; operating wavelengths range = 1135-3400 nm; spectral range limited by the grating rotation angle = 4500 nm.
• Model 7804020: blaze wavelength = 2000 nm; *reciprocal linear dispersion = 2.94 nm/mm; spectral resolution = 0.06 nm; operating wavelengths range = 1335-4000 nm; spectral range limited by the grating rotation angle = 4500 nm.
• Model 7804025: blaze wavelength = 2500 nm; *reciprocal linear dispersion = 2.75 nm/mm; spectral resolution = 0.06 nm; operating wavelengths range = 1670-4500 nm; spectral range limited by the grating rotation angle = 4500 nm.

Gratings with line density 300 mm-1

• Model 780330: blaze wavelength = 300 nm; *reciprocal linear dispersion = 4.39 nm/mm; spectral resolution = 0.09 nm; operating wavelengths range = 200-600 nm; spectral range limited by the grating rotation angle = 6000 nm.
• Model 780335: blaze wavelength = 350 nm; *reciprocal linear dispersion = 4.39 nm/mm; spectral resolution = 0.09 nm; operating wavelengths range = 235-700 nm; spectral range limited by the grating rotation angle = 6000 nm.
• Model 780350: blaze wavelength = 500 nm; *reciprocal linear dispersion = 4.38 nm/mm; spectral resolution = 0.09 nm; operating wavelengths range = 335-1000 nm; spectral range limited by the grating rotation angle = 6000 nm.
• Model 780360: blaze wavelength = 600 nm; *reciprocal linear dispersion = 4.37 nm/mm; spectral resolution = 0.09 nm; operating wavelengths range = 400-1200 nm; spectral range limited by the grating rotation angle = 6000 nm.
• Model 780370: blaze wavelength = 700 nm; *reciprocal linear dispersion = 4.35 nm/mm; spectral resolution = 0.09 nm; operating wavelengths range = 470-1400 nm; spectral range limited by the grating rotation angle = 6000 nm.
• Model 7803010: blaze wavelength = 1000 nm; *reciprocal linear dispersion = 4.31 nm/mm; spectral resolution = 0.08 nm; operating wavelengths range = 670-2000 nm; spectral range limited by the grating rotation angle = 6000 nm.
• Model 7803015: blaze wavelength = 1500 nm; *reciprocal linear dispersion = 4.23 nm/mm; spectral resolution = 0.08 nm; operating wavelengths range = 1000-3000 nm; spectral range limited by the grating rotation angle = 6000 nm.
• Model 7803020: blaze wavelength = 2000 nm; *reciprocal linear dispersion = 4.11 nm/mm; spectral resolution = 0.08 nm; operating wavelengths range = 1335-4000 nm; spectral range limited by the grating rotation angle = 6000 nm.
• Model 7803030: blaze wavelength = 3000 nm; *reciprocal linear dispersion = 3.8 nm/mm; spectral resolution = 0.08 nm; operating wavelengths range = 2000-6000 nm; spectral range limited by the grating rotation angle = 6000 nm.
• Model 7803035: blaze wavelength = 3500 nm; *reciprocal linear dispersion = 3.59 nm/mm; spectral resolution = 0.08 nm; operating wavelengths range = 2330-7000 nm; spectral range limited by the grating rotation angle = 6000 nm.

Gratings with line density 200 mm-1

• Model 780235: blaze wavelength = 350 nm; *reciprocal linear dispersion = 6.6 nm/mm; spectral resolution = 0.13 nm; operating wavelengths range = 235-700 nm; spectral range limited by the grating rotation angle = 9000 nm.
• Model 780240: blaze wavelength = 400 nm; *reciprocal linear dispersion = 6.6 nm/mm; spectral resolution = 0.13 nm; operating wavelengths range = 270-800 nm; spectral range limited by the grating rotation angle = 9000 nm.
• Model 780250: blaze wavelength = 500 nm; *reciprocal linear dispersion = 6.6 nm/mm; spectral resolution = 0.13 nm; operating wavelengths range = 335-1000 nm; spectral range limited by the grating rotation angle = 9000 nm.
• Model 780270: blaze wavelength = 700 nm; *reciprocal linear dispersion = 6.6 nm/mm; spectral resolution = 0.13 nm; operating wavelengths range = 470-1400 nm; spectral range limited by the grating rotation angle = 9000 nm.
• Model 7802015: blaze wavelength = 1500 nm; *reciprocal linear dispersion = 6.5 nm/mm; spectral resolution = 0.13 nm; operating wavelengths range = 1000-3000 nm; spectral range limited by the grating rotation angle = 9000 nm.
• Model 7802020: blaze wavelength = 2000 nm; *reciprocal linear dispersion = 6.4 nm/mm; spectral resolution = 0.13 nm; operating wavelengths range = 1335-4000 nm; spectral range limited by the grating rotation angle = 9000 nm.
• Model 7802025: blaze wavelength = 2500 nm; *reciprocal linear dispersion = 6.3 nm/mm; spectral resolution = 0.13 nm; operating wavelengths range = 1670-5000 nm; spectral range limited by the grating rotation angle = 9000 nm.
• Model 7802030: blaze wavelength = 3000 nm; *reciprocal linear dispersion = 6.2 nm/mm; spectral resolution = 0.12 nm; operating wavelengths range = 2000-6000 nm; spectral range limited by the grating rotation angle = 9000 nm.

Gratings with line density 150 mm-1

• Model 781547: blaze wavelength = 475 nm; *reciprocal linear dispersion = 8.8 nm/mm; spectral resolution = 0.17 nm; operating wavelengths range = 320-950 nm; spectral range limited by the grating rotation angle = 12000 nm.
• Model 781570: blaze wavelength = 700 nm; *reciprocal linear dispersion = 8.8 nm/mm; spectral resolution = 0.17 nm; operating wavelengths range = 470-1400 nm; spectral range limited by the grating rotation angle = 12000 nm.
• Model 7815030: blaze wavelength = 3000 nm; *reciprocal linear dispersion = 8.5 nm/mm; spectral resolution = 0.17 nm; operating wavelengths range = 2000-6000 nm; spectral range limited by the grating rotation angle = 12000 nm.
• Model 7815045: blaze wavelength = 4500 nm; *reciprocal linear dispersion = 8.1 nm/mm; spectral resolution = 0.16 nm; operating wavelengths range = 3000-9000 nm; spectral range limited by the grating rotation angle = 12000 nm.

Gratings with line density 100 mm-1

• Model 780165: blaze wavelength = 650 nm; *reciprocal linear dispersion = 13.2 nm/mm; spectral resolution = 0.26 nm; operating wavelengths range = 435-1300 nm; spectral range limited by the grating rotation angle = 18000 nm.
• Model 780170: blaze wavelength = 700 nm; *reciprocal linear dispersion = 13.2 nm/mm; spectral resolution = 0.26 nm; operating wavelengths range = 470-1400 nm; spectral range limited by the grating rotation angle = 18000 nm.
• Model 7801010: blaze wavelength = 1000 nm; *reciprocal linear dispersion = 13.2 nm/mm; spectral resolution = 0.26 nm; operating wavelengths range = 670-2000 nm; spectral range limited by the grating rotation angle = 18000 nm.
• Model 7801020: blaze wavelength = 2000 nm; *reciprocal linear dispersion = 13.1 nm/mm; spectral resolution = 0.26 nm; operating wavelengths range = 1335-4000 nm; spectral range limited by the grating rotation angle = 18000 nm.
• Model 7801025: blaze wavelength = 2500 nm; *reciprocal linear dispersion = 13 nm/mm; spectral resolution = 0.26 nm; operating wavelengths range = 1670-5000 nm; spectral range limited by the grating rotation angle = 18000 nm.
• Model 7801030: blaze wavelength = 3000 nm; *reciprocal linear dispersion = 12.9 nm/mm; spectral resolution = 0.26 nm; operating wavelengths range = 2000-6000 nm; spectral range limited by the grating rotation angle = 18000 nm.
• Model 7801042: blaze wavelength = 4200 nm; *reciprocal linear dispersion = 12.7 nm/mm; spectral resolution = 0.25 nm; operating wavelengths range = 2800-8400 nm; spectral range limited by the grating rotation angle = 18000 nm.
• Model 7801048: blaze wavelength = 4800 nm; *reciprocal linear dispersion = 12.6 nm/mm; spectral resolution = 0.25 nm; operating wavelengths range = 3200-9600 nm; spectral range limited by the grating rotation angle = 18000 nm.
• Model 7801055: blaze wavelength = 5500 nm; *reciprocal linear dispersion = 12.5 nm/mm; spectral resolution = 0.25 nm; operating wavelengths range = 3670-11000 nm; spectral range limited by the grating rotation angle = 18000 nm.
• Model 7801062: blaze wavelength = 6200 nm; *reciprocal linear dispersion = 12.3 nm/mm; spectral resolution = 0.24 nm; operating wavelengths range = 4130-12400 nm; spectral range limited by the grating rotation angle = 18000 nm.
• Model 7801072: blaze wavelength = 7200 nm; *reciprocal linear dispersion = 12 nm/mm; spectral resolution = 0.24 nm; operating wavelengths range = 4800-14400 nm; spectral range limited by the grating rotation angle = 18000 nm.
• Model 7801088: blaze wavelength = 8750 nm; *reciprocal linear dispersion = 11.5 nm/mm; spectral resolution = 0.23 nm; operating wavelengths range = 5830-17500 nm; spectral range limited by the grating rotation angle = 18000 nm.
• Model 7801097: blaze wavelength = 9700 nm; *reciprocal linear dispersion = 11.1 nm/mm; spectral resolution = 0.22 nm; operating wavelengths range = 6470-18000 nm; spectral range limited by the grating rotation angle = 18000 nm.
• Model 7801103: blaze wavelength = 10300 nm; *reciprocal linear dispersion = 10.9 nm/mm; spectral resolution = 0.21 nm; operating wavelengths range = 6870-18000 nm; spectral range limited by the grating rotation angle = 18000 nm.

Gratings with line density 75 mm-1

• Model 7875070: blaze wavelength = 7000 nm; *reciprocal linear dispersion = 16.7 nm/mm; spectral resolution = 0.33 nm; operating wavelengths range = 4670-14000 nm; spectral range limited by the grating rotation angle = 24000 nm.
• Model 7875095: blaze wavelength = 9500 nm; *reciprocal linear dispersion = 16 nm/mm; spectral resolution = 0.32 nm; operating wavelengths range = 6330-19000 nm; spectral range limited by the grating rotation angle = 24000 nm.

Gratings with line density 50 mm-1

• Model 7850010: blaze wavelength = 1000 nm; *reciprocal linear dispersion = 26.4 nm/mm; spectral resolution = 0.52 nm; operating wavelengths range = 670-2000 nm; spectral range limited by the grating rotation angle = 36000 nm.
• Model 7850038: blaze wavelength = 3800 nm; *reciprocal linear dispersion = 26.2 nm/mm; spectral resolution = 0.52 nm; operating wavelengths range = 2530-7600 nm; spectral range limited by the grating rotation angle = 36000 nm.
• Model 7850063: blaze wavelength = 6300 nm; *reciprocal linear dispersion = 25.8 nm/mm; spectral resolution = 0.51 nm; operating wavelengths range = 4200-12600 nm; spectral range limited by the grating rotation angle = 36000 nm.
• Model 7850070: blaze wavelength = 7000 nm; *reciprocal linear dispersion = 25.7 nm/mm; spectral resolution = 0.51 nm; operating wavelengths range = 4670-14000 nm; spectral range limited by the grating rotation angle = 36000 nm.
• Model 7850083: blaze wavelength = 8300 nm; *reciprocal linear dispersion = 25.5 nm/mm; spectral resolution = 0.5 nm; operating wavelengths range = 5530-16600 nm; spectral range limited by the grating rotation angle = 36000 nm.
• Model 7850124: blaze wavelength = 12400 nm; *reciprocal linear dispersion = 24.6 nm/mm; spectral resolution = 0.48 nm; operating wavelengths range = 8270-24800 nm; spectral range limited by the grating rotation angle = 36000 nm.
• Model 7850169: blaze wavelength = 16900 nm; *reciprocal linear dispersion = 23.2 nm/mm; spectral resolution = 0.46 nm; operating wavelengths range = 11270-33800 nm; spectral range limited by the grating rotation angle = 36000 nm.
• Model 7850200: blaze wavelength = 20000 nm; *reciprocal linear dispersion = 22 nm/mm; spectral resolution = 0.43 nm; operating wavelengths range = 13330-36000 nm; spectral range limited by the grating rotation angle = 36000 nm.

Gratings with line density 37.5 mm-1

• Model 7837028: blaze wavelength = 2800 nm; *reciprocal linear dispersion = 35.1 nm/mm; spectral resolution = 0.69 nm; operating wavelengths range = 1870-5600 nm; spectral range limited by the grating rotation angle = 48000 nm.
• Model 7837056: blaze wavelength = 5600 nm; *reciprocal linear dispersion = 34.8 nm/mm; spectral resolution = 0.69 nm; operating wavelengths range = 3735-11200 nm; spectral range limited by the grating rotation angle = 48000 nm.
• Model 7837093: blaze wavelength = 9300 nm; *reciprocal linear dispersion = 34.3 nm/mm; spectral resolution = 0.68 nm; operating wavelengths range = 6200-18600 nm; spectral range limited by the grating rotation angle = 48000 nm.
• Model 7837156: blaze wavelength = 15600 nm; *reciprocal linear dispersion = 33 nm/mm; spectral resolution = 0.65 nm; operating wavelengths range = 10400-31200 nm; spectral range limited by the grating rotation angle = 48000 nm.

Gratings with line density 24 mm-1

• Model 7824116: blaze wavelength = 11600 nm; *reciprocal linear dispersion = 54 nm/mm; spectral resolution = 1.1 nm; operating wavelengths range = 7730-23200 nm; spectral range limited by the grating rotation angle = 75000 nm.
• Model 7824144: blaze wavelength = 14400 nm; *reciprocal linear dispersion = 53.6 nm/mm; spectral resolution = 1.1 nm; operating wavelengths range = 9600-28800 nm; spectral range limited by the grating rotation angle = 75000 nm.
• Model 7824173: blaze wavelength = 17300 nm; *reciprocal linear dispersion = 53.1 nm/mm; spectral resolution = 1.1 nm; operating wavelengths range = 11530-34600 nm; spectral range limited by the grating rotation angle = 75000 nm.
• Model 7824243: blaze wavelength = 24300 nm; *reciprocal linear dispersion = 51.6 nm/mm; spectral resolution = 1 nm; operating wavelengths range = 16200-48600 nm; spectral range limited by the grating rotation angle = 75000 nm.
• Model 7824285: blaze wavelength = 28500 nm; *reciprocal linear dispersion = 50.5 nm/mm; spectral resolution = 1 nm; operating wavelengths range = 19000-57000 nm; spectral range limited by the grating rotation angle = 75000 nm.
• Model 7824325: blaze wavelength = 32500 nm; *reciprocal linear dispersion = 49.2 nm/mm; spectral resolution = 1 nm; operating wavelengths range = 21670-65000 nm; spectral range limited by the grating rotation angle = 75000 nm.

* At the blaze wavelength.
** At the wavelength 255 nm.
For blaze wavelength 2000 nm and shorter the data are measured by multielement detectors with entrance slit 15 microns.
For the wavelength more than 2000 nm the data are obtained by calculation with the entrance slit 15 microns.