Patent ID: 7602562
Filing Date: 2009-10-13
Classification: G02B

Abstract:
1. An apparatus for processing an electronic component substrate using a laser lens, the apparatus comprising: a linear actuator moving the laser lens along a Z-axis to a desired position relative to the electronic component substrate, the linear actuator including a coil winding and a magnet; a fluid counterbalance supporting the laser lens and defined by a fluid operated cylinder having a piston associated with a housing for movement between end limits of travel, the piston dividing the housing into first and second fluid chambers having first and second fluid communication ports respectively, the fluid counterbalance responsive to movement of the linear actuator; and a fluid pressure source connectable to the first and second chambers through the first and second fluid communication ports respectively, the fluid pressure source adjustable to suspend the laser lens in equilibrium to any position associated with opposite end limits of travel of the piston associated with the housing.