Objectives, telescope lenses and focus translators
Demanding scan applications require optics of the highest quality. Take advantage of our long standing experience to correctly specify, select and validate the optical components for your application. Our development team would be happy to assist you with the design and layout of custom lenses and optics.
F-Theta lenses (pre-objective scanning)
With pre-objective scanning, the scan head is located in front of the lens in the beam path. ARGES offers a wide range of so-called F-Theta lenses to focus the laser beam on a single plane over the entire scan field during 2D processing.
2 types of lenses are employed:
Standard F-Theta lenses
An F-Theta lens focuses the laser beam on a single plane over the entire scan field. These lenses are therefore also referred to as flat field lenses.
Telecentric F-Theta lenses
A telecentric F-Theta lens focuses the laser beam on a single plane over the entire scan field while also ensuring the beam remains perpendicular to the plane at all times. These lenses are therefore also employed for vision applications, measurement equipment or micromaterial machining.
Telescope lenses and focus translators (post-objective scanning)
With post-objective scanning, the scan head is located behind the lens in the beam path.
For geometrical reasons, deflection by a mirror always results in a curved focal plane. To flatten the scan field again, it is necessary to compensate for this curvature by varying the focal length of the lens. This is done by moving a lens along the beam path. The component that moves one of the telescope lenses is called a focus translator.
This variable lens positioning allows 3D processing of the workpiece.