| 摘要 |
The present invention provides an excitation source (12) which may be used, for example, in conjunction with the scanning of multi-channel electrophoresis chips (18) or capillary arrays. The excitation source (12) is comprised of a source of light (22), such as a laser beam. A beam expander (24), an acousto-optic deflector (28), and a filter (30) are optically aligned with the source of light (22). A driver (32) is connected to the acousto-optic deflector (28) for controlling the angle of deflection. A system is disclosed which includes the excitation source (12), a detector (14) for detecting fluorescence from a target chip (18), and a beam splitter (16) or other device for optically connecting the excitation source (12) to the chip (18) and for optically connecting the chip (18) to the detector (14). The excitation source (12) may be based on an acousto-optic deflector, an electrooptic deflector, a piezoelectric deflector, or any other electronically controlled device. Methods of focusing a beam of collimated light and electronically exciting a plurality of micro-areas of a target chip, either serially or in parallel, are also disclosed.
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