Inexpensive high-speed dentist drill light chopper and its use in rejecting luminescence background from Raman spectra

Contributors:   Robert J. Nemanich, S.A. Solin, and J. Doehler

ABSTRACT

An inexpensive dentist drill laser beam chopper is described. The chopper, which can be tuned for a chopping frequency from 100 Hz to 400 kHz, is compact, stable, and easily constructed. The usefulness of the dentist drill laser beam chopper is demonstrated in a technique for the suppression of luminescence background in Raman spectra. The technique is shown to be capable of almost complete suppression of luminescence with decay lifetimes greater than 10−6 sec.

Publisher: Review of Scientific Instruments,   Volume: 47,   741 ||  Published: 1976-01 ||   PDF (536.91 KB) ||   Read more...