The development of a virtual instrument (VI) interface to acquire spectroscopic measurements using a quantum cascade laser-based on LabVIEW^TM is presented. The interface can enable mid-infrared laser spectroscopic data acquisition using a fast response mercury-cadmium-telluride (MCT) detector. The MCT is connected to an analog/digital converter card, and the data is displayed in a virtual high-speed oscilloscope. The VI processes the acquired data, displays the information, and saves it to a file through several operations using a “state machine” architecture. Transmission measurements of a polystyrene film were used to calibrate the system. They were compared to the National Institute of Standards and Technology-based FT-IR reference spectrum, showing excellent agreement. The system was tested with four different optical setups for IR Transmission, Diffuse Reflectance Infrared Spectroscopy, Reflection Absorption Infrared Spectroscopy, and Attenuated Total Reflection. The VI can be easily customized, allowing users to adapt it according to their specific laboratory needs.

使用基于 LabVIEW ^TM的量子级联激光器进行光谱测量的虚拟仪器 (VI) 接口的开发被表达。该接口可以使用快速响应的汞镉碲 (MCT) 检测器实现中红外激光光谱数据采集。MCT 与模拟/数字转换器卡相连，数据显示在虚拟高速示波器中。VI 处理获取的数据，显示信息，并使用“状态机”架构通过多次操作将其保存到文件中。聚苯乙烯薄膜的透射测量用于校准系统。它们与基于美国国家标准与技术研究所的 FT-IR 参考光谱进行了比较，显示出极好的一致性。该系统使用四种不同的光学设置进行了测试，分别是 IR 透射、漫反射红外光谱、反射吸收红外光谱和衰减全反射。