Miniature Fiber Optic Spectrometers
SPECTRAUSBusb pic WPI offers now its SpectraUSB miniature spectrometers optimized for absorbance, fluorescence and NIR applications. The SpectraUSBs are miniature spectrometers, which plug directly into the USB port of any desktop or notebook PC. With the SpectraUSB, getting started is as easy as installing WPI’s SpectraWare™ software package and connecting the tiny spectrometer to the USB port of the computer. Other features make operating the spectrometer equally hassle-free. The spectrometer does not require an external power supply ˆ drawing the power from the computer.
WPI offers different gratings for the spectrometer, these define its wavelength range. The resolution of the spectrometer is determined by its slit-width (SLIT-xxx). The miniature spectrometers can be equipped with a number of detector upgrades. A collection lens, L2, can be placed in front of the detector array to increase the spectrometers light collection efficiency and reduce stray light. This is especially useful when using large core diameter fibers in low light-level applications. A CCD array with 2048 pixels is used as this detector. UV2 is a detector upgrade, which is required for measuring at wavelength below 350 nm. Multi-bandpass order sorting filters are available to avoid second order effects in the spectrometer modules (OFLV).
Miniature Spectrometers
The SpectraUSB spectrometer is pre-set to a 200-850 nm wavelength range and comes with a UV2-enhanced UV detector upgrade, a multi-bandpass order-sorting detector coating, along with a 25 µm entrance slit installed for an optical resolution to 1.5 nm (FWHM). The SpectraUSB-NIR is preset to a 350-900 nm range and is equipped with a 25 µm slit. In addition, we offer snap-on, direct attach accessories specifically designed for these spectrometers. USBVIS and USBUV are light source/cuvette holder combos for absorbance measurements in the 390-950 nm for VIS/NIR range and 200-950 nm UV/VIS/NIR range respectively.
The SpectraUSB-M2 is a basic spectrometer, equipped with a grating or your choice. Detector upgrades (Slit, L2, UV2 and OFLV) can be selected when ordering the instrument. If an application requires a specific wavelength range, resolution or sensitivity, contact WPI for customization.
SpectraUSB-DBL is a dual channel spectrometer, pre-set to a 200-850 nm wavelength range and comes with a UV2- enhanced UV detector upgrade, a multi-bandpass order-sorting detector coating , along with a 25 µm entrance slit installed for an optical resolution to 1.5 nm (FWHM).
SPECTRAUSB+USBVIS SPECTRAUSB-SPT
SPECTRAUSB-FL
SPECTRAUSB-FL is a pre-configured spectrometer for fluorescence applications, equipped with a L2 lens and a 200 µm slit. Integrated into this detector is a time-gated mode that delays the start of spectral data acquisition by 5-500 microseconds after the excitation source is turned on. Using a pulsed light source, the detector sees in this mode the sample when the light is switched off. However, in order to use the gated phosphorescence mode, the fluorophore must have a long fluorescence lifetime. Those working with lanthanides and phosphorescent materials will find the gated phosphorescence mode particularly useful. To further improve the efficiency of the detector, the standard mirrors of the optical bench were replace by Ag-coated mirrors. This improved the sensitivity of the detector by over 20%.
 
 
Order Numbers
Single-Channel Detectors
SPECTRAUSB4 200-850, 25 µ slit, 1.5 nm resolution
SPECTRAUSB4-FL 380-1050nm, 200 µm slit, - 10 nm resolution
SPECTRAUSB4-NIR 350-1000nm, 25 µm slit, - 1.5 nm resolution
SPECTRAUSB4-HR-CG High Resolution Composite Grating Spectrometer 200-1100 nm, 5 µm slit, 1.0 nm (FWHM) resolution value
Detector Upgrades
SLIT-xxx 5, 10, 25, 50, 100, 200 µm
Accessories
USBVIS Attachable Light Source [VIS: 390-900 nm] + Cuvette Holder
USBUV Attachable Light Source [UV: 200-1100 nm] + Cuvette Holder
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