摘要
提出用汇编语言编制程序控制单片机(AT89C51)及外围电路组成的驱动电路驱动步进电机带动单色仪旋转,得到各个期望波长的光,然后使光信号经过光电倍增管(Hamamatsu1P28)进行光电转换后得到电信号,把电信号传进数字示波器,通过数字示波器上带有的RS232串口把光谱数据传回计算机处理得到各个波长光的衰减曲线、然后用计算机编程绘图进行处理得到时间分辨光谱的方法。这种测量时间分辨光谱方法的特点是测量各个波长光谱时,在时间上是并行测量而在波长上是串行测量的。通过测量样品Tb(o-BBA)3phen中稀土元素Tb发光的时间分辨光谱验证了这种方法的可行性。介绍了所用测试系统的各部分硬件组成和测试技术,获得了样品Tb(o-BBA)3phen的荧光强度-波长-时间的三维立体图以及对时间积分的积分谱。
A new method for measuring time-resolved spectrum （TRS） is brought forward. Programming with assemble language controlled the miero-eontrol-proeessor（AT89C51）, and a kind of peripheral circuit constituted the drive circuit, which drived the stepping motor to run the monoehromator. So the light of different kinds of expected wavelength could be obtained. The optical signal was transformed to eleetrieal signal by optical-to-electrical transform with the help of photomultiplier tube （Hamamatsu 1P28）. The electrical signal of spectrum data was transmitted to the oscillograph. Connecting the two serial interfaces of RS232 between the oscillograph and computer, the electrical signal of spectrum data could be transmitted to eomputer for programming to draw the attenuation eurve and time-resolved speetrum （TRS） of the swateh. The method for measuring timeresolved speetrum （TRS） features parallel measurement in time scale but serial measurement in wavelength scale. Time-resolved spectrum （TRS） and integrated emission speetrum of Tb^3＋ in swateh Tb（σ-BBA）3 phen were measured using this method. Compared with the real time-resolved speetrum （TRS）. It was validated to be feasible, eredible and eonvenient. The 3D speetra of fluoreseenee intensity-wavelength-time, and the integrated speetrum of the swateh Tb（σ-BBA）3 phen are given.
出处
《光谱学与光谱分析》
SCIE
EI
CAS
CSCD
北大核心
2007年第2期217-219,共3页
Spectroscopy and Spectral Analysis
基金
国家自然科学基金项目(10374002
10434030)资助
关键词
光谱测量
时间分辨光谱
积分谱
Spectroscopic measurement
Time-resolved spectrum
Integrated spectrum
