Patent ID: 7408129

Claim:
A laser beam machine with a cylindrical lens system comprising: a chuck table for holding a workpiece; a laser beam application means for applying a laser beam to the workpiece held on the chuck table, said laser beam application means including a laser beam oscillation means for oscillating a laser beam, and a condenser for converging the laser beam oscillated by the laser beam oscillation means; said condenser including a first cylindrical lens unit having a first cylindrical lens, a second cylindrical lens unit disposed at an interval from the first cylindrical lens unit and having a second cylindrical lens which has a converging direction perpendicular to that of the first cylindrical lens, and an interval adjustment mechanism for adjusting the interval between the first and second cylindrical lens units; said interval adjustment mechanism including a support board, a first support table mounted on the support board and holding one of the first and second cylindrical lens units, a second support table mounted slidably on the support board at an interval from the first support table and holding the other of the first and second cylindrical lens units, said second support table being movable along the support board toward and away from the first support table, and a control means for adjusting the interval between the first and second support tables; and said control means including a first adjustment plate fixed to the support board, a second adjustment plate fixed to the second support table and disposed at a distance from the first adjustment plate and an adjusting screw means fitted in the second adjustment plate, said adjusting screw means including a metering rod having an end in contact with the first adjustment plate, whereby when the adjusting screw means is turned, the second support table is adjustably moved toward and away from the first adjustment plate.