Key Features Of F-theta Lens
Wavelength Compatibility: Designed to accommodate various laser wavelengths, such as 1064nm, 532nm, and 355nm, ensuring versatility for different applications.
Focal Length Options: The F-θ lens series provides a range of focal lengths, allowing users to select the appropriate lens based on the specific requirements of their laser systems.
Entrance Pupil Diameter Variation: Offers options with different entrance pupil diameters to suit the diverse needs of laser applications, providing flexibility in system design.
Power Adjustment: Subdivided into products with different power specifications, enabling users to choose the optimal F-theta lens based on the power requirements of their laser systems.
Telecentric Design: Incorporates a telecentric design, ensuring that the chief rays are parallel to the optical axis. This feature of telecentric F-theta lens is valuable for maintaining consistent image quality throughout the field of view.
Precision for Ultrafast Lasers: Developed in response to the latest trends in laser technology, the F-theta scan lens series includes a specialized flysecond optical system, catering to ultrafast laser applications.
What Is F-theta Lens?
An f-theta lens, including telecentric f theta lens, is a type of lens used in laser marking, engraving, and scanning systems. The term 'f-theta' refers to the relationship between the focal length (f) and the angle (theta) of the laser beam as it scans across a flat plane. Unlike regular lenses that create a linear increase in distance with the angle, f-theta lenses produce a linear increase in distance for each unit of angle over a flat field.
The primary function of an f-theta scan lens is to ensure a consistent spot size and marking quality across the entire marking field. This is crucial in applications where precision and uniformity of laser marking or engraving are essential.
F-theta scan lenses are commonly used in laser systems for tasks such as marking barcodes, serial numbers, patterns, or intricate designs on materials like metals, plastics, and ceramics. The flat field of focus provided by these lenses allows for accurate and distortion-free laser marking over a specified area."
How Does a Galvanometer Scanner Work?
A galvanometer scanner operates as a special type of oscillating motor. The basic principle involves an energized coil generating torque within a magnetic field. Unlike traditional rotating electric machines, the rotor in a Galvo motor system is loaded with a reset torque via a mechanical spring or electronic method. When the coil is energized with a specific current, the rotor deflects to a certain angle, balancing the electromagnetic torque with the restoring moment. This deflection is proportional to the current, similar to a galvanometer, hence the name galvanometer scanner.
The operation of a galvanometer scanner involves inputting a position signal, causing the Galvo motor to swing to a specific angle based on the voltage-to-angle conversion ratio. The entire process employs closed-loop feedback control, comprising five control circuits: position sensor, error amplifier, power amplifier, position distinguisher, and current integrator.
Analog galvanometer scanners are susceptible to electromagnetic interference, leading to scattered points, curved lines, and irregular shading. In contrast, digital galvanometer scanners convert analog signals into digital signals, effectively suppressing environmental interference.
Whether you need a single axis galvo scanner or a more complex galvanometer mirror scanner, understanding these principles will help you choose the right system for your laser marking machine. Explore Scanner Optics collection to find the perfect Galvo motor system for your needs.