產品介紹
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MS520
產品說明
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Monochromator-spectrograph MS520 series have a unique combination of high-intensity, accuracy and spectral resolution. Large angle of rotation of the grating allows to use Echelle grating, providing extremely high spectral resolution (up to 0.002 nm), as well as extended operating wavelength range for the other gratings.
M520 Series monochromator-spectrographs are based on Cherny–Turner asymmetric scheme that allows to minimize of aberrations and exclude spectra re-entrance from diffraction gratings and mirrors. Monochromators–spectrographs of MS520 series have one input port and two output ports. Selection of an output port is realized with an automated mirror. Either output spectral slits or multi-channel detectors can be installed on each of the output ports. We offer monochromators–spectrographs of MS520 Series with two types of input and output spectral slits: manual, operated with a micrometer screw and automated (combined), when the slit width is operated automatically or manually (with micrometer).
A wide choice of changeable gratings gives the best combination of high energetic efficiency and maximal spectral resolution for different spectrum areas. We also offer a wide range of additional accessories for Monochromators–spectrographs of MS350 series: Filter Wheel FWS-8A, -6A, Fast shutters, Fiber optics with adapters, input and output Condensres, Detectors and etc. Extremely high spectral resolution – 0,0020nm for Echelle grating 75 grooves/mm - in combination with small size and a variety of configurations and accessories make monochromators-spectrographs of MS520 series ideal devices for high resolution spectroscopy and Raman spectroscopy. High optical throughput makes it essential for luminescent investigations. |
I M A G I N G
Theory & Instructions |
Monochromator-spectrograph MS520 series, models
| MS5201 | MS5201i | MS5204 | MS5204i | |
| Diffraction unit | Single-position holder for manually changeable gratings | Single-position holder for manually changeable gratings | Four–grating turret | Four–grating turret |
| Optics | Standard | Imaging | Standard | Imaging |
In the devices with the standard optics (model MS5201 and model MS5204) a flat entrance deflecting mirror is used, and in the astigmatism–compensated devices (model MS5201i and model MS5204i) a cylindrical mirror is used as an entrance deflecting.
As well as in all Czerny–Turner design spectral devices, in the MS520 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.
In MS5204 and MS5204i the gratings rotation axes are arranged perpendicular to the spectrum scanning axis, providing a high repeatability of wavelength setting at replacing of gratings.
產品規格
Optical system
| Optical scheme: | Cherny–Turner (astigmatism–compensated in model MS5201i and model MS5204i) |
| Ports: | 1 input, 2 output |
| Wavelength range: | 185 nm - 60 µm (depends on the type of grating) |
| F/number (entrance): | 5.4 |
| Focal length (output): | 520 mm |
| Scanning range limited by the grating rotation angle: | 0-1580 nm (grating 1200 l/mm) |
| Main mirrors: | spherical |
| Stray light: | 1х10-6 (20 nm from laser line 632.8 nm) |
| Focal plane: | 28 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 MS5204i and MS5201i)
Imaging
| Model: | MS5201 | MS5204 | MS5201i | MS5204i |
| Horizontal magnification: | 1.07 | 1.07 | 1.07 | 1.07 |
| Vertical magnification: | - | - | 1.29 | 1.29 |
| Vertical spatial resolution (minimal distance between the edges of the two nearby tracks (in multichannel spectroscopy)): |
- | - | <20 µm | <20 µm |
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Spectral image obtained with imaging monochromator-spectrograph MS5204i (grating 1800 l/mm,
light source - mercury-neon lamp, multi-channel fiber bundle, fiber core diameter 200µm, CCD pixel size 24x24 µm).
Drive
| Motor: | stepper, with fractional steps |
| Drive: | sine |
| Step size: | 0.22 arc seconds |
| Precision: | ± 1 step |
| Max. speed: | 10000 steps/s |
Optics
| Type of grating: | 1200 l/mm, λ = 546 nm |
Echelle, 75 l/mm, λ = 200 nm, 120 order |
| Reciprocal linear dispersion: | 1.55 nm/mm | 0.11 nm/mm |
| Spectral resolution: | ||
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- PMT (slit width 10 µm): |
0.028 nm | 0.0020 nm |
| - digital cameras (12 µm pixel): | 0.034 nm | 0.0024 nm |
| Repeatability: | ± 0.007 nm | ± 0.0009 nm |
| Wavelength accuracy: | ± 0.034 nm | ± 0.0044 nm |
| Average scanning step: | 0.0017 nm | - |
| Scanning step at 200 nm: | - | 2.25 x 10-4 nm |
Gratings
| Size: | 80 x 70 x 10 mm | |
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Rotation: |
About the center of grating working surface | |
| Mounting: | Automated 4-grating turret (models MS5204, MS5204i) |
Positioner for 1 manually changeable grating models MS5201, MS5201i) |
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Grating repeatability: |
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- *wavelength: |
± 0.02 nm | ± 0.05 nm |
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- vertical image: |
± 50 µm | ± 75 µm |
* For grating 1200 l/mm, wavelength 546 nm
Ports
| Number: | 1 input, 2 output |
| *Output port repeatability (automated mirror): | ± 0.03 nm |
| Switching time (output port): | 4 s |
* For grating 1200 l/mm, wavelength 546 nm
Spectral slits
| Type of spectral slit: | Automated (combined) | Manual |
| Control: | Automated (drive) or manually (micrometer) | manually (micrometer) |
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Width: |
Regulated from 0 up to 2.0 mm | Regulated from 0 up to 2.0 mm |
| Parallelism: | ± 1 µm | ± 1 µm |
| Accuracy (slit 1 mm): | ± 10 µm | ± 10 µm |
| Repeatability: | ± 1 µm | ± 1.5 µm |
| Reading accuracy (micrometer): | 2 µm | 2 µm |
| Step size (automated slit): | 0.5 µm | - |
| Height: | Diaphragm-regulated from 0 up to 10 mm (as option) | Diaphragm-regulated from 0 up to 10 mm (as option) |
Integrated shutter
| Shut time: | ~100 ms |
| Max. frequency: | 1 Hz |
| Control: | On-board CPU or TTL-signals from the external device |
Control
| Central: | on-board CPU |
| External: | PC |
| External interface: | Ethernet |
Dimensions
| Overall sizes (LхWхH): | 635 х 339 х 270 mm |
| Weight: | 25 kg (may vary, depends on the configuration) |
