|The S150-2 spectrometer is a two-channel instrument. This feature in the design extends the consumer properties of S150-2. S150-2 can be successfully used in photometry if it is equipped with two identical gratings in each channel. The use of gratings with different groove density in each channel makes it possible to choose the registration bandwidth and spectral resolution.
In each channel of the spectrometer, linear multi-element detectors are installed. Both detectors is able to acquire spectra simultaneously. Each channel provides a 30 mm focal plane width. The input slits have a fixed size (the standard width is 25 μm). The input slit widths can be modified on customer request in the range of 15 -40 μm. Illumination of the spectrometer entrance slits is carried out by the use of a two-channel optical fiber (one input and two outputs) or two single-channel optical fibers. The lighting can be performed directly without optical fibers.
In most cases, it is convenient to use one two-channel optical fiber, because often both channels complement each other and solve the same task. An example is the spectral characteristics measurement of laser lines. In one of the S150-2 channels, an Echelle grating can be installed for this purpose. The user has the opportunity to mark with a marker the spectral line that is observed in the spectrometer channel where a conventional grating is located, and the software automatically finds the given line in another channel where there is a high-precision grating (Echelle grating).
It is known that Echelle spectrometers can provide high-precision (up to 10 pm) wavelength measurements. The S150-2 spectrometer with a new non-linear calibration sets higher limits for the accuracy of the wavelength measurement (from 5 pm to 1 pm, depending on the spectrum order) over a wide spectral range of 200 -1100 nm.
The S150-2 spectrometer is a small-sized device that does not have moving elements in its design, and it has high long-term stability. High-precision calibration along with long-term stability of the spectrometer are necessary for precise wavelength control. Calibration and wavelength measurement must be carried out under the same conditions to avoid temperature effects. However, the conditions in which wavelength calibration were performed may differ from the conditions in which the instrument is currently used. Therefore, there is a possibility of spectral autocalibration in the S150-2, which can be performed by the user at any time. This achieves reproducibility of measurements results for the entire lifetime of the instrument.
The S150-2 spectrometer is reliable, compact, with portable design, easy in operation. The software which is supplied with the device, provides collection, visualization and analysis of data. It has an intuitive interface. There are two models of S150-2: S150-2-1024USB and S150-2-3648USB, which differ in the photodetector.
Features and Advantages
Theory & Instructions
|Optical system:||vertical–symmetrical (two spectrometers in one housing)|
|Focal length:||158 mm|
|Flat field:||29.2 x 0.2 mm or 25.6 x 0.5 mm|
|Size of diffraction grating:||15 x 15 х 3 mm|
|Spectral slit (entrance):||25 x 600 µm|
|Light input:||with optical fiber|
|Overall sizes:||200 х 143 х 72 mm|
|Diffraction grating, mm-1:||600||1200||75,Echelle
(200 nm, 120 order)
|Spectral resolution, nm:||< 0.4||< 0.2||0.015|
|Registration band, nm:||from 268
|Dispersion, nm/mm:||from 10.45 to 10.08||from 5.18 to 4.16||0.3|
|Wavelength accuracy, nm:||< 0.16||< 0.08||0.004|
|Diffraction grating, mm-1:||600||1200||75,Echelle
(200 nm, 120 order)
|Spectral resolution, nm:||< 0.3||< 0.15||0.009|
|Registration band, nm:||from 305
|Dispersion, nm/mm:||from 10.44 to 10.06||from 5.18 to 4.09||0.3|
|Wavelength accuracy, nm:||< 0.04||< 0.02||0.001|
Note: The wavelength registration band shows the width of the spectral range simultaneously registered by a detector. Principally, a registration band is determined by width of a detector and by choice of a diffraction grating. The registration band gets narrow with increasing of line density. To a lesser extent, a registration band depends on a wavelength, but with increasing of line density this dependence is growing.
The specification contains the maximum and minimum values of the registration band and dispersion which correspond to final (end) positions of gratings. For example, for the model S150-2-1024USB with 600 l/mm grating the registration band 268 nm corresponds to the range of 200-468 nm and 258 nm corresponds to the range of 807-1065 nm. Thus, the registration band for this model can be selected in the spectral range 200-1065 nm.
|Number of pixels:||1024||3648|
|Width of pixel:||25 µm||8 µm|
|Height of pixel:||500 µm||200 µm|
|Spectral response:||200 – 1065 nm||200 – 1100 nm|
|Min. exposure time:||2.1 ms||7.4 ms|
|Max. exposure time (20°С):||5.0 s||3 s|
|Min. interval between scans:||1.0 ms||1.0 ms|
|Dynamic range for one scan:||3600:1||1100:1|
|Analogue–to–digital converter (ADC):||14 bit, 16384 counts||12 bit, 4096 counts|
|Synchronization:||internal, external||internal, external|
|Configuration:||two-channel (1 input, 2 outputs), one-channel (1 input, 1 output)|
|Fiber material:||UV silica|
|Length:||Standard – 0.5m; 1 m; 2 m; any length possible on request|
|Spectrum visualization mode:||separate / joint|
|Scanning modes:||single-spectrum/ multi-spectra|
|Scanning:||continuous / set number of cycles|
|Accumulation type:||summing / averaging|
|Peaks processing:||search / width and intensity measurement / report|
|Photometry mode:||transmission / absorption|
|Wavelength measurement of 2nd and 4th harmonic of tunable lasers with Echelle help:||optional|
|Signal integration in the set wavelength range:||yes|
|Real-time wavelength measurement:||yes|
|Data compatibility with MS Office, EXCEL:||yes|
We propose a wide range of ruled and holographic diffraction gratings (15 x 15 x 3 mm) for UV, visible and IR regions to be used in the spectrometers of S150-2 series. Our specialists will help you to make a right choice of diffraction gratings for your tasks ensuring the best combination of high energetic efficiency and minimal stray light for different regions of a spectrum.
Diffraction gratings (15 x 15 x 3 mm) of UV and visible range for the devices of S150-2 series
|*Reciprocal linear dispersion, nm/mm||**Spectral range limited by detector sensitivity & the grating efficiency not less than 40%, nm||Simultaneously registered spectral range, nm|
|2400||270||2.49||200 – 540||60||70|
|1800||270||3.41||200 – 540||85||95|
|1800||500||3.11||335 – 1000||75||85|
|1200||280||5.2||200 – 560||130||145|
|1200||400||5.12||270 – 800||125||140|
|1200||500||5.03||335 – 1000||125||140|
|1200||600||4.91||400 – 1100||120||135|
|1200||750||4.67||500 – 1100||115||130|
|600||280||10.6||200 – 560||260||295|
|600||350||10.5||235 – 700||260||295|
|600||650||10.4||435 – 1100||255||290|
|600||750||10.3||500 – 1100||255||290|
|400||280||15.8||200 – 560||390||445|
|300||350||21.1||235 – 700||520||590|
|300||500||21.1||335 – 1000||520||590|
|300||600||21||400 – 1100||520||590|
|300||700||21||470 – 1100||520||590|
|200||350||31.7||235 – 700||785||890|
|200||500||31.6||335 – 1000||785||890|
|200||700||31.6||470 – 1100||785||890|
* at the blaze wavelength
** spectral range for S150-2-3648USB. For S150-2-1024USB long-wavelength limit: 1065 nm instead of 1100 nm.
Echelle Grating, 75 mm-1
|Wavelength, nm||Reciprocal linear dispersion, nm/mm||Spectral resolution, nm||Wavelength accuracy, nm|