Numerous industries have the demand to laser mark and engrave on large areas and free form curved objects, traditionally requiring the use of robotics or 5-axis CNC machines. The common solutions available on the market for controlling the z-coordinate are based on a mechanical translation. Such delicate movements in an industrial operating environment are limited in their lifetime, speed, and require lots of space for integration. Optotune’s compact optical system containing tunable liquid lenses with an optical feedback and inline visual inspection add-on overcomes all the aforementioned downsides ensuring space-saving system, excellent reliability, long lifetime, fast marking, both large marking area and large z-range, and uniform spot size.