MCD-2 & LM-3 Monochromator
MCD-2 double monochromator
The MCD-2 double monochromator, which features an extremely low level of optical noise, is intended for the use with analytical instruments operating in the ultraviolet and visible spectral ranges. The monochromator is made by a proprietary design concept based on two concave diffraction gratings with a special groove profile and two deflecting plane mirrors, which provide high resolution throughout the working spectral range.
LM-3 monochromator
The LM-3 monochromator is intended for the use with analytical instruments operating in the ultraviolet and visible spectral ranges. The monochromator has one concave diffraction grating with a special groove profile, which allows focusing of a diffracted beam on the exit slit by turning the diffraction grating around its rotation axis while the slits remain in a fixed position.
Wavelengths are set by a stepper motor drive in MCD-2 and LM-3.
In both monochromators, the slits are formed in an easily removable fiber optic lug made from 200-µm diameter quartz fibers packed in rows. Fiber optic cables are compatible with monochromators of both types.
Description
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SPECIFICATIONS |
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MCD-2 |
LM-3 |
Working range |
280 - 710 nm |
200 - 750 nm and zero order |
Diffraction grating |
replica |
replica |
Groove spacing |
1250 lines per mm |
1200 lines per mm |
Blaze wavelength |
400 nm |
300 - 400 nm |
Ruled area |
56 x 56 mm |
35 x 35 mm |
Working order |
first |
first |
Radius of curvature of the diffraction grating |
250 mm |
125 mm |
F-number |
1 : 4 |
1 : 3.3 |
Reciprocal dispersion |
1.6 nm |
6 - 7 nm |
Resolution (with a 200-ì slit) |
0.33 nm |
1.2 - 1.4 nm |
Signal-to-noise ratio at a wavelength of 632.8 nm for a ± 10 slit width from the center |
>3x106 |
>104 |
Size |
335x240x153 mm |
205x150x125 mm |
Weight |
8 kg |
2.6 kg |
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