| 摘要 |
PURPOSE:To obtain an electrical migration device which does not require alignment of light axis of laser beam even if a laser oscillator is exchanged. CONSTITUTION:In a gel electrical migration device using laser beam as a detection means, a laser capacitor 98 with previously aligned light axis and a reflection mirror 72 are fixed to an upper surface 92 of a pedestal of the device. A recessed part with a longer center axis which is in parallel with the light axis of the laser capacitor is placed toward a capacitor 98 from one edge of the pedestal and a laser oscillator which is fixed to a laser fixing base 14 is housed and fitted at the recessed part. A longer center axis of the laser fixing base 14 is in parallel with the center axis of laser beam which is radiated from the laser oscillator and the longer center axis of the laser fixing base 14 is in parallel with the longer center axis of the recessed part. |
