LASER BEAM TRIMMING DEVICE

摘要

PURPOSE:To execute the working of high accuracy by transmitting a laser light through an optional zone by a variable rectangular slit as well as varying in a extremely short time the strength of a 2nd laser light to be projected next by comparing with the strength of a 1st laser light. CONSTITUTION:The laser light passing a variable slit 7 to the work position of the body 10 to be worked is transmitted in the laser projection range 11 of the work objective body 10. At this time, if necessary, a light reducing means 5 is used to control the power on each laser pulse. In this case, the transmission amt. is controlled by the time of <=50mm. With such composition the working accuracy can be improved.