| 摘要 |
The present invention relates to optical alignment system applicable to an optical communication system or a laser machining apparatus. The system comprises first and second light source means (3, 8) for emitting, respectively, a first and a second light beam which are different in wavelength from each other; first and second driver means (2, 7) for driving said first light source means and said second light source means, respectively, such that optical signals of said first light beam and said second light beam contain frequency components different in frequency from each other; optical beam multiplexer means for multiplexing said first light beam and said second light beam; beam position sensor means (14) for receiving said first and the second light beams from the multiplexer means to produce electrical signals which are representative of information with respect to actual positions on said beam position sensor means to which the first and the second light beams from said multiplexer means are incident; first and second control means (15,16) for extracting, respectively, the frequency components of the first light beam and second light beam from the electrical signals which are outputted by said beam position sensor means and thereby producing a first and a second control signal associated with the differences of the actual positions to which said first light beam and said second light beam from said multiplexer means are incident and a first and a second reference position; and beam adjusting means (9, 11, 18, 19) for adjusting optical axes of the first optical beam and the second optical beam in response to, respectively, said first control signal and said second control signal; the adjustment of optical axis by said beam adjusting means being continued until the first light beam and the second light beam become incident to said first and second reference positions, respectively. |
