Lindblom Peter
Multichannel Instruments AB, Pilotgatan 2,128 32 Skarpnäck Stockholm, Sweden.
Appl Opt. 2003 Aug 1;42(22):4549-59. doi: 10.1364/ao.42.004549.
A new device for producing order-sortable echelle spectra by use of consecutive diffactions in several echelle grating surfaces is described. This echelle emulating device (EED) comprises a prism placed in the path between a pair of echelle grating surfaces. The refractive angle of the prism is fixed through a simple relation. The device reproduces all the main properties of a single virtual echelle, obtained from a simple grating equation describing the combined action of the gratings and the prism. The spectral order of the EED is the sum of the spectral orders of the individual gratings. A spectrograph that utilizes the device is described, and several applications are discussed.
描述了一种通过在多个阶梯光栅表面进行连续衍射来产生可顺序排序的阶梯光谱的新装置。这种阶梯模拟装置（EED）包括一个放置在一对阶梯光栅表面之间路径中的棱镜。棱镜的折射角通过一个简单的关系固定。该装置再现了从描述光栅和棱镜组合作用的简单光栅方程获得的单个虚拟阶梯的所有主要特性。EED的光谱级是各个光栅光谱级的总和。描述了一种使用该装置的光谱仪，并讨论了几种应用。
