Patent ID: 8110816

Claim:
A fluorescence detection system comprising: a light source adapted to emit excitation light; a probe arranged in opposition to a sample; an optical multiplexer/demultiplexer adapted to multiplex and demultiplex fluorescence generated from the sample irradiated with the excitation light through said probe; a detector adapted to receive the light passing through said optical multiplexer/demultiplexer; and a waveguide adapted to connect said light source to said detector through said optical multiplexer/demultiplexer; and wherein: said optical multiplexer/demultiplexer includes a first wavelength selection member adapted to transmit only the light whose wavelength is longer than a predetermined first wavelength and reflect the light whose wavelength is shorter than a predetermined second wavelength, and the fluorescence detection system further comprises a second wavelength selection member arranged between said light source and said first wavelength selection member on said waveguide and adapted to transmit only the light whose wavelength is shorter than a predetermined third wavelength.