APPLICATION OF THE RAPID SCAN ACCESSORY TO THE RAMANOR HG-2S TO TIME RESOLUTION OF KAMAN OBSERVATIONS

Author Institution: Instruments SA IncorporatedThe introduction of the rapid scan accessory to Jobin Yvon’s Ramanor HG-2S enables resolution of time dependent changes in Raman spectra generated by chemical changes or physical perturbations. Once attached or retrofitted to the Ramanor’s wavenumber drive, the rapid scan accessory need not be removed since the normal modes of operation, of the instrument are maintained; when not activated the cam returns to the rest position, which brings the wavenumber drive to its normal calibration point. Time resolution is in the domain of seconds with total range of operation (which is linear in wavenumber) between 50 and $300\, cm^{-1}$. After selecting the starting wavenumber position, the range in wavenumbers of a sweep and the time per sweep, the Raman signals from the photomultiplier detector are recorded on an oscilloscope or other fast transient recording device. A full description of the mechanical design of the fast scan accessory will be presented, as well as some applications to chemical and physical problems

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

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