The S150 spectrometer is designed to analyse spectra of CW and pulsed laser light sources. Due to its relatively low aperture ratio and high spectral resolution the S150 perfectly suits for wavelength measurements of lasers, diodes and other sources emitting high-power optical signals.
The spectral range and resolution (i.e. grating lines density) are chosen at the time of placing your order. For your convenience the SPECIFICATIONS lists the average values of grating dispersion, spectral resolution and multichannel array bandpass corresponding to a certain grating. Contact a SOLAR LS specialist for more precise calculation of parameters for your instrument.
The S150 may contain a CCD detector based on either one of three non-cooled linear image sensors (see the SPECIFICATIONS). The TCD1304 linear image sensor is the most popular due to its high sensitivity and narrow pixels capable of providing high spectral resolution.
The S150 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 S150 can be triggered from your light source with standard TTL trigger pulses via connector BNC-58. The S150 is also able to produce TTL trigger pulses.
The S150 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 spectrometer is able to operate without the optical fiber, with analysed light steered directly to its input slit.
To meet both of the conflicting demands, high resolution and wide operation range, within a single compact device we have developed the two-channel spectrometer S150-II.
The optical bench design of the S150-II two-channel spectrometer provides possibility of installing either two of diffraction gratings listed in the SPECIFICATIONS, with alternate recording of channels spectral ranges.
Yet the optical bench of the S150-II spectrometer does not contain any movable parts. The only moving element is a shutter which interrupts the optical beam in one of the channels. The shutter is moved from one channel to the other (changing the spectral operation range of the S150-II spectrometer) manually by a simple turn of the two-position switch.
The S150 Optical Schematic
The S150-II Optical Schematic
Having chosen proper diffraction gratings for two channels of the S150-II spectrometer you are able to observe either:
|SPECTROGRAPH||S150 ( S150-II )|
|Focal Length, mm||150|
|Entrance slit width, mm height, mm||0.018 3|
|Diffraction grating||one of the following (two for the S150-II)|
|lines/mm||200||300||400||600||1200||1800||1800 2ndorder||1800 3rdorder|
|Reciprocal dispersion (average), nm/mm||33||21.5||16||10.5||5||3.3||1.4||0.8|
|Spectral Resolution (average), nm1)||0.66||0.44||0.32||0.21||0.1||0.06||0.025||0.015|
|Spectral range, nm||200-1100||200-1100||200-1100||200-1100||200-1100||200-800||200-450||200-350|
|Multichannel array bandpass, nm||920||620||460||310||150||95||40||23|
|Computer Interface||Full-Speed USB|
|Optical Input||UV Optical Fiber 0.6 (0.4)mm diameter, 1m lengh SMA-905 connector|
|Dimensions, mm||155 x 200 x 105|
1) Spectral resolution of the S150 spectrometer is indicated for the detection system based on the TCD1304 linear image sensor.
|LINEAR IMAGE SENSOR||TCD1304 3648 pixels pix.size 8mm||TCD1205 2048 pixels pix.size 14mm||S8378-1024 1024 pixels pix.size 25mm|
|Active area size, mm||29.18 x 0.2||28.67 x 0.2||25.6 x 0.5|
|Min. exposure time, ms||7.3||4.1||2.0|
|Max. exposure time, s1)||0.5||4.0||5.0|
|Max. S/N for 1 Scan||400 : 1||400 : 1||1000 : 1|
|Dynamic Range||900 : 1||1000 : 1||3500 : 1|
|Photo sensitivity, V/lux×s3)||160||80||22 (HS) 4.4 (LS)|
|Readout noise, ADC counts||18||14||16 (HS) 3) 4.4 (LS)|
|ADC Resolution||14 bit, 16384 counts|
|Requirements to external trigger pulse|
|— amplitude, V||3-15|
|— pulse duration FWHM, µs||5-20|
|Parameters of the trigger pulses|
|— amplitude, V||4-5|
|— pulse duration FWHM, µs||10|
1) Max. exposure time is the time when the dark signal reaches 10% of the dynamic range at +25°C ambient.
2) Antiblooming is a sensor feature eliminating charge overflow from exposed pixels to surrounding pixels.
3) The S8378-512 linear image sensor provides possibility of control over sensitivity mode: high (HS) or low (LS).
SPECTRA RECORDED WITH S150
The S150 spectrometer with the diffraction grating 1800 lines/mm, operating in the 3rd spectral order within the range 200-350nm (width of the simultaneously recorded spectral interval is 23nm) allows resolving lines of Hg 313.184nm and 313.155nm, with distance between lines 29pm. A fragment of the respective spectrum is shown below.
Fragment of emission spectrum of the mercury lamp recorded by the S150 spectrometer with the 1800 lines/mm grating
To calculate the operating spectral range and resolution, select the diffraction grating, detector type and entrance slit width. Then select the location of the multichannel array bandpass within the possible spectral range of the diffraction grating.
|Spectral resolution (average), nm|
|Multichannel array bandpass|
|Reciprocal linear dispersion (average), nm/mm|
|Entrance slit width|
|Number of pixels|
|Active area size|
|Maximum spectral sensitivity|
|Non-uniformity of sensitivity|
|Frame processing time|
|Mean-square reading noise, ADC counts|
|External syncpulse requirements|
|Generating syncpulse parameters|