The NFS-230/330 Series is an integrated near-field spectrometer system providing fluorescence and photoluminescence spectra with extremely high spatial resolution.

NFS-230/330/230CThe topographical mapping capabilities of near-field and precision control of the distance between the probe tip and sample surface can be used to provide controlled excitation of a submicroscopic region on the sample surface, providing fluorescence and photoluminescence data with a spatial resolution orders of magnitude greater than conventional microscopy.

System Features

  • An integrated near-field microspectrometer system
  • Measurement of fluorescence/photoluminescence spectra at high spatial resolutions from 50 to 1000 nm
  • Topographic mapping of almost any sample; organic, inorganic, metal or biopolymer, etc.
  • For low temperature experiments, the NFS-330 includes a He gas-flow cryostat for cooling to 10K or less
  • Automated switching of illumination/collection modes, excitation sources and filters
  • The NFS-230T and -330T can be integrated onto an existing platform; the NFS-230V and -330V are supplied with a vibration isolation table


Image Manager Software

Image Manager SoftwareImage Manager software provides a high resolution display of a wide variety of 3D NFS data including sample surface topography maps. Measurement results for peak intensity/intensity ratio distributions, peak area/area ratio distributions, and peak half-width values are used to provide incredibly realistic 3D images of the spectral mapping data. Computation of distance and area measurements, cross-section analysis functions plus various image processing tools for high data volumes are used for efficient derivation of necessary information from the NFS system.

Electrical Panel

Electrical PanelAn even broader range of experimental systems can be devised and integrated with the NFS series via direct access to BNC connectors on the interface panel of the instrument power supply.

  • Simultaneous mapping of two data channels
  • Synchronous control of near field spectrometer system and other external instruments using input and output triggers
  • External feedback control circuit provides switching between probe excitation and stage control signals
  • Synchronized control of probe excitation and data acquisition


Measurement ModesIllumination-collection, collection, and illumination (transmission)
Internal Laser Source532 nm source standard, or optional 632.8 nm excitation
External Laser PortCapability for two excitation sources (including internal source)
SpectrometerAberration-corrected Czerny-Turner spectrometer
Focal Length300 mm
Diffraction GratingsStandard gratings of 1,800 lines/mm and 600 lines/mm
Wavelength Resolution0.5 nm or greater
Wavelength Range500 to 1,000 nm (Depends on probe used)
DetectorThermoelectric or liquid nitrogen-cooled multichannel CCD detector
Spatial ResolutionAperture diameter (or less) of nearfield probe (1000 – 50 nm)
Stage Range20 x 20 microns (room temp.),
5 x 5 microns (cryostat)
Height8 microns (room temp.), 2 microns (cryostat)
Control PCWindows 2000/XP OS
Communication16-bit ADC
Image AcquisitionVideo capture
SoftwareFeedback signal monitor and near-field mapping measurement software, 3D display software, CCD image display for probe observation, mapping analysis software, spectral analysis software
Sample CoolingGas-flow cryostat (NFS-330)
Main Unit Size710 x 680 x 550 mm (W x D x H) (NFS-230)
710 x 680 x 750 mm (W x D x H) (NFS-330)
Power Supply335 x 450 x 140 mm (W x D x H)
WeightMain unit:90 kg , Power Supply: 15 kg, Vibration isolation table: 280 kg
Power Requirement100 V AC ±10%, 250 VA (Excluding PC and laser)
Other RequirementsNitrogen or air source for vibration isolation table, 0.3 to 0.8 MPa (50-100 psi)