What Is a 360–780 nm Full-Spectrum Spectrophotometer? How Does It Differ from 400–700 nm?
360–780 nm vs. 400–700 nm: Spectral Range and Selection
What Is a 360–780 nm Full-Spectrum Spectrophotometer? How Does It Differ from 400–700 nm?
A spectrophotometer measures reflected or transmitted light across wavelengths to analyze color and calculate color differences. Common 400–700 nm instruments cover the visible range and are often sufficient for routine color measurement and quality control. A 360–780 nm full-spectrum model covers a wider range, providing additional ultraviolet and near-infrared spectral information for applications involving UV response or fluorescence.
Fluorescence and UV response
Samples containing fluorescent whitening agents, fluorescent pigments or other UV-responsive ingredients may emit light when excited by UV energy in the source. As a result, measured color can vary with the instrument’s UV conditions. Confirm that the measurement range and UV control match the material and applicable standard. A wider wavelength range does not automatically make a measurement more accurate; instrument choice should reflect the sample, illumination and viewing conditions, and evaluation requirements.
How to choose the measurement range
For selection, identify the sample type, presence of fluorescent or UV-responsive materials, measurement purpose and required standard. For routine visible-color comparisons and quality control, 400–700 nm may be sufficient. If UV response or information outside the visible range must be assessed, consider 360–780 nm full-spectrum equipment. Compare results using actual samples and keep the instrument, illumination, geometry, calibration and operating conditions consistent.