Patent ID: 8545686

Claim:
An electrophoretic apparatus comprising: a plurality of electrophoretic paths; an irradiation unit that irradiates excitation light onto the electrophoretic paths arranged at predetermined intervals therebetween; a wavelength dispersion unit that disperses fluorescent light output from the electrophoretic paths according to the wavelength; and an optical detection unit that detects light from the wavelength dispersion unit so as to obtain an emission spectrum, wherein: a wavelength dispersion direction of the wavelength dispersion unit is slightly inclined with respect to a direction perpendicular to an electrophoretic direction in each of the electrophoretic paths, the wavelength dispersion unit disperses the fluorescent light according to the wavelength such that a plurality of emission spectrums corresponding to the plurality of electrophoretic paths do not overlap each other and are substantially positioned along a straight line in the wavelength dispersion direction, the plurality of emission spectrums are adjacent to each other in series along the same straight line in the wavelength dispersion direction and are slightly inclined and slightly deviated from each other, the irradiation positions of the excitation light in the plurality of electrophoretic paths are deviated from each other along the electrophoretic direction, and the wavelength dispersion unit is arranged so as to be perpendicular to an emission line of the fluorescent light.