Home - Products - Optics & Lens - F-theta Lens

Best F-theta Scan Lens | Telecentric F-theta Lens | 355nm - 10600nm

Introducing our F-theta scan lens, a versatile optical component widely used in laser marking, cutting, drilling, and etching processes. Our F-theta scan lens enables fast and uniform scanning across the entire field of view, with distortion controlled within 0.2%. Meeting the highest international standards for advanced lenses, our product line stands out for its comprehensive variety, immediate availability, reliable quality, and very competitive price.

Our F-theta Scan Lens range is divided into three main categories:

1. Flat Field F-theta Scan Lens:
Covering a wavelength range from 355nm ultraviolet (UV) to 10.6um infrared, our optical glass F-theta scan lenses are suitable for most low-power industrial laser marking and other laser processing applications on the market. Compared to fused silica, optical glass lenses offer a larger scanning angle. High-power fused silica F-theta scan lenses have a higher damage threshold to withstand high laser power and better thermal stability to reduce thermal focal drift. For stable focusing in high-power laser processing applications, high-power fused silica F-theta scan lenses are widely used. ZnSe F-theta scan lenses are designed for CO2 lasers, made of zinc selenide crystal, with a wavelength primarily ranging from 9.3μm to 10.6μm.

2. Telecentric F-theta Scan Lens:
The impact angle of our telecentric F-theta scan lens is strictly controlled to ensure that the outgoing beam is nearly perpendicular to the working plane at any field angle. This results in significantly improved roundness of the focal point, xy-direction uniformity, and z-direction perpendicularity across the entire laser processing area. Therefore, 他、telecentric F-theta scan lenses offer special advantages in precision machining and vertical drilling. Optical glass telecentric f-theta scan lenses are suitable for low-power laser processing, while fused silica telecentric f-theta scan lenses have a higher damage threshold to withstand high laser power.

3. Achromatic F-theta Scan Lens:
Featuring a unique achromatic design, our achromatic F-theta scan lens aligns the working focal plane of a 1064nm laser with the visible light focal plane monitored by a CCD camera, enabling clear imaging for CCD full-field laser processing(coaxial vision).

2024 Best F-theta Scan Lens For Sale!

Buy 355-10600nm f-theta lens directly from China manufacturer, LASERCHINA with affordable and cheap price.

Showing all 4 results

Achromatic F-theta Scan Lens

Rated 0 out of 5
From $399.00 For Bulk Buyer.
  • Very Competitive Price.
  • OEM / ODM Customization Available.

F-theta Galvo Scan Lens

Rated 0 out of 5
From $19.90 For Bulk Buyer.
  • Full Wavelength from 355nm to 10.6um.
  • Full Focal Length Range from 63mm to 1450mm.
  • High Quality Optical Glass, Fused Silica and Zinc Selenide Material.
  • Very Competitive Price.
  • OEM / ODM Customization Available.

Telecentric F-theta Galvo Scan Lens

Rated 0 out of 5
From $599.00 For Bulk Buyer.
  • Full Wavelength from 355nm to 1940um.
  • Full Focal Length Range from 32mm to 330mm.
  • High Quality Optical Glass and Fused Silica Material.
  • Very Competitive Price.
  • OEM / ODM Customization Available.

More Products Are Uploading, Contact Us for Info in Advance.

Rated 0 out of 5
From $9.99 For Bulk Buyer.
Although the product is ready, it has not been uploaded to our website yet. If you are interested in learning more, please contact us and we would be happy to provide you with more information.

F-theta Laser Scan Lens | All You Need to Know !

Advanced F-theta Scanning & Focusing Lens with High Quality Optical Glass, Fused Silica and ZnSe Materials.

In the realm of laser technology, precision and efficiency are paramount. f-theta lenses, also known as scan lenses or linear lenses, play a crucial role in achieving these objectives. Designed to ensure a relationship between image height and scanning angle (y=f*θ), these lenses are pivotal for applications requiring uniform image quality across a plane. This blog post delves into the characteristics, types, and selection criteria of f-theta lenses, providing insights for professionals and enthusiasts alike in the laser industry.

Characteristics of f-theta Lenses

F-theta lenses boast several distinctive features that set them apart in laser applications. Firstly, they provide a flat imaging plane for monochromatic light, ensuring consistent image quality with minimal aberrations. Additionally, they offer a linear scanning capability, where a certain deflection speed of the incident light corresponds to a roughly constant scanning speed. This makes them ideal for applications requiring precision and uniformity in laser scanning processes.

Types of f-theta Lenses

The classification of f-theta lenses can be based on the number of lens elements they contain, such as single-element, double-element, and triple-element configurations. Generally, single-element lenses are simpler and more cost-effective, particularly in CO2 laser applications where the material costs are higher. The choice between different types often depends on material considerations and the complexity of the manufacturing process. Furthermore, f-theta lenses are available for various wavelengths, including 266nm DUV, 355nm UV, 450nm blue light, 532nm green light, and 1064nm fiber, with the 1064nm fiber and 10.6um CO2 lenses being among the most commonly used.

Selecting the Right f-theta Lens: Essential Knowledge

When choosing an f-theta lens, several technical parameters are crucial, including the working wavelength, scanning range (or focal length), and focused spot diameter. The working wavelength is determined by the laser source, while the scanning range is influenced by the lens’s focal length. An essential consideration is the focused spot size, which plays a significant role in the precision and effectiveness of the laser process. LASERCHINA engineers emphasize the importance of matching the lens to the application’s requirements, considering factors such as the scanning area and the material being processed.

Innovative Solutions for Complex Laser Marking Needs

When facing challenges in reconciling marking precision with the range, several approaches can be considered. Advanced techniques such as 3D scanning systems, utilizing small-field lenses in conjunction with XY platforms, selecting telecentric lenses, or opting for UV or EUV laser systems, offer potential solutions. These methods, developed and recommended by LASERCHINA engineers, enable users to achieve high-quality laser marking results even in demanding applications.

Conclusion: Navigating the World of f-theta Lenses

The selection of the right f-theta lens, whether for a laser scan lens or any specific application, is a critical decision that can significantly impact the outcome of laser processing tasks. By understanding the characteristics, types, and selection criteria of these lenses, professionals in the field can make informed choices that enhance the precision, efficiency, and quality of their work. As the laser technology landscape continues to evolve, staying informed about the latest advancements and solutions in f-theta lens technology will be key to maintaining a competitive edge.