infrapunaspektrometrit

Infrapunaspektrometrit is a term used to describe a class of spectroscopy that combines infrared (IR) measurements with analysis in the red region of the visible spectrum. The aim is to obtain complementary information about a sample by linking vibrational features in the infrared with electronic or color-related features detectable in the red.

Principle: The instrument typically uses a shared optical path covering IR and red wavelengths, with dichroic beam splitters or sequential acquisition to provide two spectral channels. An IR detector such as MCT (mercury cadmium telluride) or InSb measures the infrared response, while a silicon photodiode detects the red-visible portion. Data from both channels can be acquired simultaneously and fused for analysis.

Instrumentation: Core components include a broadband IR and red light source, a dispersive element or Fourier-transform spectrometer, a suitable sample interface (transmission, reflectance, or ATR), and dual detectors. Calibration relies on reference standards with known IR and red features, and data processing uses alignment, baseline correction, and multivariate techniques.

Applications: In practice, infrapunaspektrometrit has been discussed for polymer analysis, pigment and dye identification, pharmaceutical quality control, forensic investigations, and art conservation, where the combination of spectral regions helps resolve overlapping features or authenticate materials.

Status: The term is not uniformly adopted in the mainstream literature; similar approaches are described as hybrid infrared–visible spectroscopy or multispectral IR–red techniques. Use is limited by instrument cost and complexity, though advances in compact detectors and data fusion have broadened potential applications.