產品介紹
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MS200
產品說明
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MS200 Series monochromators–spectrographs are compact general-purpose instruments which can be used as monochromators or spectrographs with a large flat focal field. They are completely automated spectral devices with focal length of 200 mm and F-number of 1/3.6. Despite of compact overall sizes the parameters of short-focus monochromators–spectrographs do not concede to the parameters of long-focal spectral devices of other manufacturers.
High-quality optics and wide choice of diffraction gratings provide devices operation in a wide range from 185 nm up to 60 µm (depending on the selected grating).
A single-position holder for easy manual switching of gratings is used in both models MS2001 and MS2001i. A wide choice of changeable gratings gives the best combination of high energetic efficiency and maximal spectral resolution for different spectrum areas.
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I M A G I N G
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Models of monochromators–spectrographs of MS200 series
| MS2001 | MS2001i | MS2004 | MS2004i | |
| Diffraction unit | Single-position holder for manually changeable gratings | Single-position holder for manually changeable gratings | Four–grating turret | Four–grating turret |
| Optics | Standard | Astigmatism–compensated (Imaging) | Standard | Astigmatism–compensated (Imaging) |
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In the devices with the standard optics (model MS2001 and model MS2004) a flat entrance deflecting mirror is used, and in the astigmatism–compensated devices (model MS2001i and model MS2004i) a cylindrical mirror is used as an entrance deflecting. As well as in all Czerny–Turner design spectral devices, in the MS200 series an axis of the diffraction gratings rotation goes through the center of grating operating surface and coincides with the direction of grooves. This fact provides the stability of the geometry of the beams for formation of a flat and fixed focal field. The image quality in the whole flat focal field is optimized due to the use of an asymmetric scheme and use of a focusing large-size mirror allows one to use the whole focal field width without vignetting. Besides, Cherny–Turner asymmetric scheme provides a low level stray light and light re-entrance from the optical elements and detectors can be avoided. |
產品規格
Optical system
| Optic layout: | Cherny–Turner (astigmatism–compensated in model MS2001i and model MS2004i) |
| Ports: | 1 input and 2 output |
| Wavelength range: | 185 nm – 60 µm |
| F/number (entrance): | 3.6 |
| Focal length (output): | 200 mm |
| Scanning range limited by the grating rotation angle: | 0 - 1300 nm (grating 1200 l/mm) |
| Basic mirrors: | spherical |
| Stray light: | 3 х 10-5 (20 nm from laser line 632.8 nm) |
| Focal plane: | 26 х 10 mm |
Optical scheme is optimized for:
- minimization of coma aberration over the whole operating spectral range
- elimination of the light re-entrance from two basic mirrors
- elimination of the light re-entrance between mirrors of the instrument and input windows of the detectors in the focal plane
- a large plane focal field for the whole operating spectral range
- astigmatism compensation for the whole operating spectral range by means of special correcting optics (for imaging modifications MS2004i and MS2001i)
*Imaging:
| Horizontal magnification: | 1.18 |
| Vertical magnification:* | 1.48 |
| Vertical spatial resolution:* | < 40 µm ** |
* For the astigmatism-compensated models: MS2001i, MS2004i
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Spectral image obtained with imaging monochromator-spectrograph MS2004i (grating 1200 l/mm,
light source - mercury-helium lamp, multi-channel fiber bundle, fiber core diameter 200µm, CCD pixel size 24x24 µm).
Drive
| Motor: | micro-stepper |
| Drive: | worm |
| Step size: | 1.6 arc seconds |
| Precision: | ± 1 step |
| Max. speed: | 10000 steps/s |
Optics**
| Reciprocal dispersion: | 4.12 nm/mm |
| Spectral resolution | |
| - PMT (slit width 10 µm): | 0.11 nm |
| - Digital cameras (12 µm pixel): | 0.12 nm |
| Repeatability: | ± 0.036 nm |
| Wavelength accuracy: | ± 0.07 nm |
| Average scanning step: | 0.012 nm |
** For grating 1200 l/mm, slit width 15µm, wavelength 546 nm
Gratings
| Size: | 40 x 40 x 6 mm |
| Rotation: | about the center of grating working surface |
| Mounting: |
1. Automated 4-grating turret 2. Positioner for 1 manually changeable grating (models MS2001, MS2001i) |
| Grating repeatability for the automated 4-grating turret (models MS2004, MS2004i) |
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| wavelength (grating 1200 l/mm): | ± 0.03 nm |
| vertical image: | ± 40 µm |
| Grating repeatability for 1 manually changeable grating holder(models MS2001, MS2001i): | |
| - wavelength (grating 1200 l\mm): | ± 0.05 nm |
| - vertical image: | ± 40 µm |
Ports
| Number: | 1 input, 1 or 2 output |
| Output port repeatability (automated mirror): |
± 0.03 nm |
| Switching time: | 5 sec |
Spectral slits
| Width: | automated (drive) or manual (micrometer) |
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Parallelism: |
regulated from 0 up to 2.0 mm, ± 1 µm |
| Accuracy (slit 1 mm): | ± 10 µm |
| Repeatability: | ± 1 µm (± 1.5 µm - hand slot) |
| Reading accuracy (micrometer): | 2 µm |
| Step size: | 2 µm |
| Height: | diaphragm-regulated from 0 up to 10 |
Integrated shutter
| Shut time: | ~100 ms |
| Max. frequency: | 1 Hz |
| Control: | On-board CPU |
Control
| Central: | on-board CPU |
| External: | PC |
| External interface: | Ethernet |
Overall sizes
| Overal sizes (L х W х H): | 300 х 200 х 160 mm |
| Weight: | 9 kg (standard configuration) |
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