Patent ID: 8246806
Filing Date: 2012-08-21
Classification: G01N

Abstract:
1. A device comprising: a multi-capillary array including a plurality of capillaries arranged in a row on a plane and filled with a separation medium, each capillary of the plurality having a respective first portion for introducing a sample, and a respective light-irradiatable portion capable of being irradiated with excitation light, wherein the plurality of capillaries of the multi-capillary array are arranged side by side, and are in contact with each other; a first source of first excitation light beams, disposed in a position to emit the first excitation light beams in a first direction along a first excitation light beam path substantially perpendicular to a first side of the row of the plurality of capillaries; a polarizing plate disposed in the first excitation light beam path between the first source and the multi-capillary array; a second source of second excitation light beams, disposed in a position to emit the second excitation light beams in a second direction along a second excitation light beam path that is substantially opposite to the first direction and substantially perpendicular to a second side of the row of the plurality of capillaries, and wherein the polarizing plate is disposed in the second excitation light beam path between the second source and the multi-capillary array, and wherein the first side is different than the second side; a first half-wave plate for transmitting first reflected light reflected from a first surface of the capillaries in a first reflected direction, not aligned with said first excitation light beam path, so as to prevent the first reflected light from entering the first source, the first half-wave plate being disposed in the first excitation light beam path, between the multi-capillary array and the polarizing plate; and a second half-wave plate for transmitting second reflected light reflected from a second surface of the capillaries in a second reflected direction, not aligned with said second excitation light beam path, so as to prevent the second reflected light from entering the second source, the second half-wave plate being disposed in the second excitation light beam path, between the multi-capillary array and the polarizing plate.