Palmer B A, Sansonetti C J, Andrew K L
Appl Opt. 1978 Aug 1;17(15):2280-90. doi: 10.1364/AO.17.002280.
A fully automatic comparator has been designed and implemented to determine precision wavelengths from high-resolution spectrograms. The accuracy attained is superior to that of an experienced operator using a semiautomatic comparator with a photoelectric setting device. The system consists of a comparator, slightly modified for simultaneous data acquisition from two parallel scans of the spectrogram, interfaced to a minicomputer. The software which controls the system embodies three innovations of special interest. (1) Data acquired from two parallel scans are compared and used to separate unknown from standard lines, to eliminate spurious lines, to identify blends of unknown with standard lines, to improve the accuracy of the measured positions, and to flag lines which require special examination. (2) Two classes of lines are automatically recognized and appropriate line finding methods are applied to each. This provides precision measurement for both simple and complex line profiles. (3) Wavelength determination using a least-squares fitted grating equation is supported in addition to polynomial interpolation. This is most useful in spectral regions with sparsely distributed standards. The principles and implementation of these techniques are fully described.
设计并实现了一种全自动比较仪，用于从高分辨率光谱图中确定精确波长。其达到的精度优于使用带有光电设置装置的半自动比较仪的经验丰富的操作员。该系统由一台比较仪组成，该比较仪稍作修改以便从光谱图的两次平行扫描中同时采集数据，并与一台小型计算机相连。控制系统的软件有三项特别值得关注的创新。（1）对从两次平行扫描中采集的数据进行比较，并用于将未知谱线与标准谱线区分开来，消除伪谱线，识别未知谱线与标准谱线的混合情况，提高测量位置的准确性，并标记需要特别检查的谱线。（2）自动识别两类谱线，并对每类谱线应用适当的寻线方法。这为简单和复杂的谱线轮廓都提供了精确测量。（3）除了多项式插值外，还支持使用最小二乘法拟合光栅方程来确定波长。这在标准谱线分布稀疏的光谱区域最为有用。对这些技术的原理和实现进行了全面描述。
