A plurality of light emission molecules, having different light emission lifetimes, are irradiated with excitation light so that the light emission molecules emit light. The emitted light is divided into at least two different wavelength regions. Temporal changes in each of the at least two wavelength...http://www.google.com/patents/US5911952?utm_source=gb-gplus-sharePatent US5911952 - Instrument for measuring fluorescence resonance energy transfer
