Patent ID: 8246912
Filing Date: 2012-08-21
Classification: G01N

Abstract:
1. An optical detecting apparatus for a bio-chip, the optical detecting apparatus comprising: a light source system for illuminating a bio-chip with an excitation light, wherein the light source system comprises a light source for the excitation light, a light diffusing device, and a condenser lens or a condenser mirror, which are sequentially disposed on a same optical axis and in a direction in which the excitation light travels; a fluorescent light detecting system for detecting a fluorescent light emitted by the bio-chip; and a light path altering unit for directing the excitation light emitted by the light source system to a bio-chip and directing the fluorescent light emitted by the bio-chip to the fluorescent light detecting system which detects a fluorescent image of the entire biochip with a single illumination of excitation light, wherein the light path altering unit comprises a polarizing beam splitter disposed between the light diffusing device and the condenser lens or the condenser mirror, a polarizer disposed between the light diffusing device and the polarizing beam splitter, and a quarter-wave plate disposed between the polarizing beam splitter and the condenser lens or the condenser mirror; wherein a cross-sectional area of the excitation light irradiated by the light source system onto the bio-chip is greater than an entire area of the bio-chip.