| 摘要 |
PURPOSE:To improve a separating characteristic by making an electrophoresis tube thin and enhance detecting sensitivity by squeezing an excited light beam by inputting the excited light beam in the axial direction of the electrophoresis tube form the terminating end of the electrophoresis tube. CONSTITUTION:The laser beam (a) from an argon laser 8 as an exciting light source is squeezed and projected onto a detecting part D at the end part of an electrophoresis tube 2 in the axial direction of the electrophoresis tube 2. For this purpose, the laser beam (a) which is expanded through a beam expander 20 is narrowed with a condenser lens 24. When the excited light beam is inputted in the axial direction of the electrophoresis tube 2 filled with gel in this way, it is not subjected to the lens effect due to the wall of the electrophoresis tube 2. Therefore, even if the electrophoresis tube 2 is made thin, the excited light beam is narrowly limited with the detecting part D when the excited light beam is narrowed with an exciting optical system. |
