Interchangeable Gratings

You can easily interchange gratings in the MS125TM, without realigning the instrument. Refer to Table 1 for a complete selection.

Table 1 Available Grating for MS125™ 1/8 m Spectrograph


Model Line Density (I/mm) Blaze Wavelength Grating Type Peak Efficiency (%) Spectral Resolution (nm)* Multichannel Array Bandpass (nm)** Primary Wavelength Region (nm)***
77419 2400 275 Ruled 69% 0.11 nm 84 200 to 500
77420 2400 400 Holographic 73% 0.11 nm 81 250 to 500
77421 1800 560 Holographic 54% 0.14 nm 109 320 to 670
77410 1200 240 Holographic 63% 0.22 nm 168 200 to 600
77411 1200 360 Ruled 80% 0.22 nm 170 200 to 1000
77464 1200 500 Ruled 73% 0.22 nm 170 300 to 1000
77412 1200 750 Ruled 78% 0.22 nm 163 475 to 1000
77463 1200 975 Ruled 73% 0.44 nm 160 350 to 1000
77413 600 225 Ruled 60% 0.43 nm 338 200 to 400
77414 600 370 Ruled 75% 0.43 nm 338 270 to 1000
77415 600 700 Ruled 78% 0.43 nm 338 450 to 2000
77465 600 1000 Ruled 83% 0.86 nm 338 650 to 2000
77456 600 1325 Ruled 85% 0.86 nm 325 875 to 2000
77455 600 1350 Ruled 88% 0.86 nm 333 800 to 1900
77422 300 270 Ruled 70% 0.86 nm 668 200 to 650
77416 400 325 Ruled 65% 0.65 nm 503 200 to 750
77417 400 500 Ruled 88% 0.65 nm 505 275 to 1250
77457 400 1500 Ruled 82% 0.65 nm 505 925 to 2600
77458 300 950 Ruled 72% 0.86 nm 675 625 to 2000
77459 246.16 226 Ruled 62% 1.08 nm 810 200 to 500


* Measured with 10 µm x 2 mm slit and 14 x 200 µm pixel array (2048 pixels).
** Spectral bandpass depends slightly on the position of the grating. Here we give spectral bandpass values at the blaze wavelength setting of the grating.
*** The primary wavelength region is where the grating efficiency is ≥20%. System efficiency will also be affected by the reflectivity of the mirrors and the grating angle, at any wavelength.
+ Other gratings may be available to better suit your application. Please contact a sales engineer for more information.

Input Slit

The MS125™ Spectrograph comes with an input slit holder; we offer a selection of fixed slits from 10 to 200 µm wide. The choice depends upon resolution and throughput requirements.

Mounting

Rod mounting offers the greatest flexibility; you can vary the optical axis height to match your source or detector.

To order a complete 77400 MS125TM Spectrograph, order a grating and 1 fixed slit (fixed slit holder included with spectrograph).