The miniature single-channel lens spectrometer S41 is developed on the basis of three-lens achromat–anastigmats used as collimator and camera objectives. This feature provides for a number of significant differences of the S41 from other spectrometers of its class:
As a result of the above mentioned advantages, the S41 features low stray light and no astigmatism in the image plane, thus ensuring high S/N ratio and good overall system sensitivity at using a height-limited linear image sensor.
The S41 comprises a built-in detector based on the Hamamatsu S8378-512 image sensor with the active area size of 12.8mm. The detector ensures excellent linearity, wide dynamic range and no modulation of broadband spectra.
Optical scheme of S41
The S41 spectrometer is convenient and easy to use: it is calibrated by the manufacturer, does not contain any movable parts, is controlled and powered from the computer via the Full-Speed USB interface.
The S41 can be triggered from your light source with standard TTL trigger pulses via the BNC-58 connector. The S41 is able to produce TTL trigger pulses as well.
The S41 delivery set contains a USB control cable, direct and reverse synchronisation cables and UV optical fiber. Light input with the optical fiber provides flexible arrangement of your instrumentation system. The S41 is able to operate without the optical fiber, with analysed light steered directly to its entrance slit.
The S41 spectrometer advantageous features listed above make it a popular device for spectrophotometric applications, along with research applications where precise quantitative analysis in the broad spectral range is required:
|F/Number||1 : 6|
|Entrance slit||40 μm * 3mm|
|Diffraction grating, lines/mm1)||1200||600||600|
|Spectral range, nm||200 — 400||390 — 780||754 -1140|
|Reciprocal linear dispersion (average) nm/mm nm/pixel||16.57 0.414||33.28 0.83||30.27 0.76|
|Spectral resolution (average), nm||0.9 – 1.2||1.7 – 2.5||1.6 – 2.3|
|Accuracy of wavelength detection, not more than, nm||± 0.5||± 0.9||± 0.8|
|Detector||based on the S8378-512Q linear image sensor, 512 pixels with the size of 25μm|
|Active area size, mm||12.8 x 0.5|
|Min. exposure time, ms||1.0|
|Max. S/N for 1 Scan||3500 : 1|
|ADC Resolution||14 bit, 16384 counts|
|Computer interface||Full-Speed USB interface|
|Requirements to external trigger pulse||Positive|
|— amplitude, V||5-20|
|— pulse duration FWHM, ?s||BNC-58|
|Parameters of the trigger pulses|
|— amplitude, V||4-5|
|— pulse duration FWHM, ?s||10|
|Optical input||UVOptical Fiber 0.6 (0.4) mm dia., 1m length, SMA-905 connector|
|Dimensions, mm||129 x 78 x 53|
1) For obtaining spectral parameters differing from the above, diffraction gratings with a different quantity of lines can be used.
SPECTRA RECORDED WITH THE S41
Argon lamp spectrum recorded with the S41 spectrometer
Normalised luminance factor spectra of natural environment objects*:
black – duckweed from the Tsimlyansk water-storage basin, green – green bulrush, yellow-green – dry yellow bulrush, red – artificial water ecosystem
* Courtesy of Water Problems Institute, Russian Academy of Sciences, Southern Branch, Rostov-on-Don, Russia.