spectrofluorometer employing a pair of linear variable spectral filters to produce a three dimensional data output is disclosed . a collimated white light source is used that first passes through a first linear variable spectral filter , then through a sample where fluorescence occurs , then the resultant light passes through a second linear variable spectral light filter that is oriented at ninety degrees from the first filter . the light is then detected by a ccd sensor for conversion into data . this arrangement provides a very simple , rugged and compact instrument that can be used almost anywhere , such as at the scene of a contamination accident .