Fourier transform infrared spectroscopy (FTIR) window is a key optical component in infrared spectrometers, mainly used to transmit infrared light and protect the interior of the instrument from contamination or damage. Its core application areas include:
Chemistry and Materials Analysis
As a sample carrier, window plates can be directly used to detect the infrared absorption characteristics of liquids, gases, or solids (such as films and powders), helping to analyze the structure, functional groups, and material composition of organic compounds. Commonly used fluorides, potassium bromide (KBr), zinc selenide (ZnSe) and other materials, among which KBr is suitable for the mid infrared region but needs to be moisture-proof; ZnSe is wear-resistant and has excellent transparency.
Pharmaceutical and Biomedical
In drug development, window tablets are used for purity testing of active pharmaceutical ingredients and analysis of formulation components, such as monitoring tablet uniformity through transmission mode. The biological field requires biocompatible materials (such as calcium fluoride CaF ₂) suitable for cell culture media or tissue section analysis.
Environmental Monitoring and Industrial Process Control
Used for real-time detection of VOCs or atmospheric pollutants (such as CO ₂, SO ₂) in industrial waste gas, corrosion-resistant materials (such as diamond coatings) are required. In the petrochemical industry, sapphire window plates that can withstand high pressure and high temperature can monitor reaction processes online.
Security and Forensic Testing
Used for rapid identification of dangerous goods such as explosives and drugs, the window plate is required to have high mechanical strength (such as diamond) to cope with complex detection environments.
