Patent ID: 6537801
Filing Date: 2003-03-25
Classification: G01N

Abstract:
A device for reading a biochip comprising plural molecular recognition areas and plural optical positioning marks, in real time, the plural molecular recognition areas comprising fragments of DNA or RNA and occupying predetermined positions relative to the optical positioning marks, the device comprising:an optical head configured to project incident light onto the biochip, means for relatively displacing the head relative to the biochip, configured to scan over the biochip, an optical analysis system comprising, a first optical system associated with said optical head to project light possibly coming from recognition areas, onto at least a first electro-optic sensor, and a second optical system associated with the optical head to project any light from at least one positioning mark, onto at least one second electro-optic sensor, and means for servocontrolling the means for relatively displacing as a function of electrical signals from the electro-optic sensor in the optical analysis system, wherein the means for relatively displacing comprise means for macroscopic displacement and means for microscopic displacement, and wherein the means for servocontrolling is connected to the means for microscopic displacement.