Raman spectral analysis using visible excitation at 532 nm (UV ready)
Raman Spectroscopy is one of the vibrational spectroscopy techniques widely used to provide information on chemical structures and physical forms, to identify substances from the characteristic spectral patterns (‘fingerprinting’), and to determine quantitatively or semi-quantitatively the amount of a substance in a sample with high lateral resolution. Raman scattering is less widely used than infrared absorption, largely due to problems with sample degradation and fluorescence. However, recent advances in instrument technology have simplified the equipment and reduced the problems substantially. The Raman System at SUNUM can handle a wide range of sample types, sample sizes and resolution requirements. Renishaw’s inVia Raman microscope and its Windows-based Raman Environment (Wire™) software are powerful for manual measurements of points on the samples, mapping and imaging capabilities.
- Stigmatic single pass spectrograph with the following specifications:
- Extremely high efficiency 250 mm focal length spectrograph (>30% throughput in spectrograph).
- Laser spot size continuously variable from 1 to 300 μm (objective and excitation wavelength dependent) with fully optimized beam path.
- Automated Rayleigh filter changeover assembly.
- Automated, kinematically mounted, magnetically attached, Rayleigh line rejection filter set for 532 nm excitation, using paired filters, allowing ripple-free measurement of the Raman spectrum to 100 cm-1 from the laser line.
- Visible lens set motorized and kinematically mounted for optimized spectral resolution.
- Unique continually adjustable ‘easy confocal’ facility using motorized slit, with automated signal optimization.
- Encoder feedback controlled grating stage with grating (2400 lines mm-1) on interchangeable magnetic kinematic mount.
- Unique ‘extended scanning’ facility for measurement of high resolution spectra with wider wavelength range than can be accommodated on a single CCD view, without any ‘stitching’ of spectra together. Spectral resolution continuously variable via CCD binning control.
- UV and NIR enhanced Deep Depletion CCD array detector (1024 x 256 pixels). Peltier cooled to -70 ºC. No water or liquid nitrogen required.
- Motorized UV neutral density filters offering 16 different power levels from 0.00005 to 100%.
- Specially adapted Research Grade Leica microscope allowing confocal measurements with 2.5 μm depth resolution (using a 100× objective).
- Reflected light illumination.
- 25×, 20× and 50× objectives.
- 3 Binocular head with eyepieces and a color video camera.
SUNUM building, Material Characterization Lab (G155) For detailed information including Operation Conditions and Service Fees please contact: email@example.com