A NEW TRIPLE SPECTROGRAPH FOR USE WITH MULTICHANNEL DETECTORS IN RAMAN AND OTHER APPLICATIONS REQUIRING HIGH STRAY LIGHT REJECTION

Abstract

Author Institution:A new triple spectrograph, designed to increase the effectiveness and versatility of the multichannel detection concept, will be discussed. To achieve these goals, the system was designed with both concave holographic and plane holographic gratings. This combination provided excellent flexibility and stray light rejection equal to double 1-meter scanning systems. In order to further increase experimental flexibility, a unique 3-lens turreted output system was also added. This allowed the dispersion across the detector to the varied, thus enabling change of the spectral coverage and resolution without changing the grating. Specific examples of data taken with the DL-203 will be discussed. Multichannel detection offers advantages over scanning, such as faster, cleaner data collection and the ability to do real-time kinetic studies