Lightnovo
Technical notes
Spectral Resolution Measurement According to ASTM E2529-06 (Calcite)
The miniRaman spectrometers from Lightnovo are ultra-compact Raman instruments designed for high spectral resolution analysis. Spectral resolution (S) is a key parameter that defines the ability of a Raman spectrometer to distinguish between adjacent spectral peaks. The ASTM E2529-06 (2022) standard provides a reliable method to measure spectral resolution using calcite as a reference material.
miniRaman Spectrometer & Spectral Resolution
miniRaman Spectrometer & Spectral Resolution
- Compact & Lightweight – Dimensions: 112×39×34 mm³, Mass: 200 g.
- High Spectral Resolution – 6.5 cm⁻¹, measured using ASTM E2529-06 (2022).
- Patented Optical Design – High throughput (~92%) and reduced fluorescence impact.
- Versatile Applications – Suitable for field, benchtop, and integrated Raman spectroscopy.
- Measurement Procedure Using Calcite
The miniRaman Power model with an excitation wavelength of 785 nm was used for spectral resolution measurement. The procedure follows the ASTM E2529-06 (2022) guidelines, which involve:
- Optimizing measurement parameters (exposure time, number of repetitions).
- Aligning the sample for maximum Raman signal at ν = 1085 cm⁻¹.
- Recording the Raman spectrum and applying baseline correction.
- Fitting the data using an analytical curve to determine peak width.
- Calculating spectral resolution using the full width at half height (FWHH) of the ν = 1085 cm⁻¹ peak.
Results & Conclusion
The measured spectral resolution was 6.53 cm⁻¹, confirming the capability of the miniRaman spectrometer for routine and process Raman applications. The method is simple, cost-effective, and can be performed in non-specialized environments without requiring dedicated calibration samples or service engineers
The measured spectral resolution was 6.53 cm⁻¹, confirming the capability of the miniRaman spectrometer for routine and process Raman applications. The method is simple, cost-effective, and can be performed in non-specialized environments without requiring dedicated calibration samples or service engineers