芬兰维萨拉公司最新研制的光学CO２传感器Carbocap，其工作原理采用了单束 双波长非发散性红外线测量方法，其独特之处在于它的滤光镜——一种袖珍电子调谐干扰仪 ．这种滤光镜保证了它所透过的光波波长的精确性和稳定性，避免了由于滤光镜及探测器不 匹配而发生的问题及传统的旋转式滤光镜所产生的磨损． The newly developed optical CO2 sensor Carbocap by Vaisala Finland is based on the principle of single-beam dual-wavelength non-divergent infrared measurement. Its uniqueness lies in its filter, a pocket-sized electronic tuned interferometer. This filter ensures the accuracy and stability of the wavelength of light it transmits, avoids the problems caused by the mismatch of filters and detectors and the wear and tear of conventional rotary filters.