Patent ID: 9656348
Date: 2017-05-23
CPC Classifications: B23K,B24C

Claim:
1. A laser processing apparatus comprising: a holding table for holding a workpiece; laser beam applying means for applying a laser beam to said workpiece held on said holding table; moving means for relatively moving said holding table and said laser beam applying means; detecting means for applying detection light to said workpiece held on said holding table and detecting the quantity of reflected light obtained by the reflection of said detection light from said workpiece; and control means for determining whether or not said workpiece is present at a laser beam applying position according to a detection signal output from said detecting means; wherein said holding table includes a holding member for holding said workpiece under suction and an annular mount member provided so as to surround said holding member for mounting said holding member, said mount member having an upper surface treated by an irregular reflection process for irregularly reflecting light.