Patent ID: 7352459

Claim:
A fluorescence spectrophotometer system comprising: a light source; a first double monochromator comprising two or more gratings and operative to separate light from the light source into a plurality of wavelengths and to output selected wavelengths as excitation light; a light transfer module comprising a first reflection surface and a second reflection surface, the first and second reflection surfaces substantially centered on a common axis, wherein: the first reflection surface operates to direct substantially all of the excitation light directly onto a sample located within an area to be illuminated, the illuminated area centered on the common axis at a point between the first and second reflection surfaces; and the second refection surface operates to direct light that is emitted from the sample as fluorescent or luminescent light; a second double monochromator comprising two or more gratings and operative to separate the fluorescent or luminescent light directed by the light transfer module into a plurality of wavelengths and to output selected wavelengths of the fluorescent or luminescent light as emission light; and a photodetector and analyzer, operative to receive the emission light output by the second double monochromator, to detect the selected wavelengths of the emission light, and to output an indication of the selected wavelengths.