Automated Beam Expander Device
Original Publication Date: 1984-Mar-01
Included in the Prior Art Database: 2005-Feb-03
This article describes a device for automatically adjusting a telescoping beam expander to achieve optimum laser beam collimation. The beam expander components are mounted in a fixture. The spacing can be adjusted by an electric motor under the control of a logic circuit which is sensitive to the output of the expander laser beam. When a desired spacing is achieved, the components are fixed by applying adhesive. Referring to the drawing, the beam expander includes telescoping components 10 and 12 which are mounted in fixtures 14 and 16, respectively. The lower ends of the fixtures 14 and 16 slide along a guide bar 18, while the upper ends are threaded onto worm gears 20 and 22 which can be rotated by a reversible electric motor 24.