CONFOCAL RAMAN MICROSPECTROSCOPY USING A STIGMATIC SPECTROGRAPH AND CCD DETECTOR

Confocal Raman microspectroscopy has previously used pinholes placed a t the back focal plane of the microscope to provide depth resolution a long the optical axis. The process of optimizing the pinhole alignment can often be difficult and time-consuming. We demonstrate a different approach to setting up a confocal Raman microscope using a stigmatic spectrograph and a CCD detector. This arrangement is easy to use and p rovides a depth resolution of approximately 2 mum.