溴钨灯光源光谱随距离影响的规律研究
2016-10-21高哲
高哲



摘要:本文利用光栅光谱仪测量溴钨灯的发射光谱,以及溴钨灯发光光谱强度随距离的变化规律。利用光栅光谱仪测量溴钨灯的发射光谱,目的是观察溴钨灯的发射光谱,掌握测量发射光谱的原理和方法,为将溴钨灯用于光学仪器及分析测试仪器提供相应的实验依据;同时溴钨灯发光光谱随距离变化的测量值可以验证并拟合光谱功率-距离函数,为以后实验提供具体函数模型。
Abstract: In this paper, the emission spectrum of bromine tungsten lamp is measured by the grating spectrometer, and the variation of the intensity of the emission spectrum of the bromine tungsten lamp is changed with the distance. The emission spectrum is measured by the grating spectrometer bromine tungsten lamp. The purpose is to observe the emission spectra of the bromine tungsten lamp, master measurement of emission spectroscopy: the principles and methods for the bromine tungsten lamp for optical instrument analysis and test instruments provide the corresponding evidence; at the same time the measurement of bromine tungsten lamp's luminescence spectra with changes in distance values can be verified and it is fit of spectral power-distance function, and it can provide specific function model for future experiments.
关键词: 溴钨灯;发光光谱;传输距离;数据拟合
Key words: bromine tungsten lamp;emission spectrum;transmission distance;data fitting
中图分类号:TP301.6 文献标识码:A 文章编号:1006-4311(2016)07-0174-02
0 引言
发射光谱[1]是物质在高温状态或因受到带电粒子的撞击而激发后直接发出的光谱[2]。由于受激时物质所处的状态不同,发射光谱有不同的特征光谱,在原子状态中为明线光谱,如钠灯、汞、氢氖灯等.在分子状態中为带光谱,如氮放电灯;在炽热的固态、液态或高压主气体中为连续光谱,如钨灯、氖灯等。本文利用光栅光谱仪测量溴钨灯的发射光谱,目的为将溴钨灯以及其他光源用于光学仪器及分析测试仪器上忽略空气时提供相应的实验依据。
1 原理
1.1 辐射源与距离的关系
溴钨灯的发光光谱仪溴钨灯发光光强与距离之间的距离。在真空中,(火灾近程大气中,大气衰减损失可忽略不计)条件下,辐射强度I的光源在距离R的景物表面处所产生的辐射照度为E=I/R2。进而,若辐射通过一定路程的大气,则部分辐射能将因大气散射和吸收而损失。可以证明,对于单色辐射,有公式[3]……p>
