摘要
光声光谱法是一种高灵敏度的检测方法。池常数是光声检测系统的重要参数，直接衡量了系统将光能转化为声能的能力，因此池常数的标定是光声检测系统校准的重要工作。通过直接采用大气中的氧气对光声系统的池常数进行标定，对于长为100mm，直径为6mm的一阶共振光声池的池常数标定结果为2330．8Pa·cm·W^-1，重复性为0．67％，与标准气体的标定结果相比，相对误差为0．54％。实验证明可以利用大气中的氧气实现池常数的在线标定。
Photoacoustic spectroscopy is a kind of high sensitive detection method. Cell constant is an important parameter of photoacoustic detection system, which directly measurements the systemls ability of converting light energy into sound energy. So the calibration of the cell constant is an important job for photoacoustic detection system＇s metrology. Oxygen in the air is used to calibrate the cell constant. For a first order resonant cell, of which the length is 100 mm, and the diameter is 6 mm, the result of the calibration is 2330.8 Pa·cm·W^-1, and the repeatability is 0.67%. Compared to the standard gas calibration result, the relative error is 0.54 %. Experiments prove that it＇s feasible to calibrate the cell constant online using oxygen in the air.
出处
《光学学报》
EI
CAS
CSCD
北大核心
2014年第13期440-444,共5页
Acta Optica Sinica
关键词
光谱学
光声
池常数
标定
氧气
spectroscopy
photoacoustic
cell constant
calibration
oxygen
