what lens comes with the k40 laser

Lens Options for the K40 Laser: Choosing the Right One for Your Needs

If you recently purchased a K40 laser cutter or are in the market for one, you'll need to know about the different lens options available. The lens is what focuses the laser beam, so it's crucial to choose the right one for the materials you plan to cut or engrave. In this article, we'll discuss the various lens options that come with the K40 laser, as well as some additional lenses you might want to consider purchasing.

1. What Lens Comes with the K40 Laser?

When you purchase a K40 laser cutter, it typically comes with a 40W CO2 laser tube and a 12mm focal length lens. This lens is suitable for cutting and engraving a variety of materials, including wood, acrylic, leather, and paper. However, if you plan to work with thicker materials, you may need a lens with a longer focal length.

2. Longer Focal Length Lenses

A longer focal length lens, such as a 18mm or 20mm lens, will allow you to cut thicker materials more effectively. This is because the laser beam will have a larger point size at the material's surface, which reduces the beam's energy density. A lower energy density means that the material will require more passes to cut through, but the cut will be cleaner and more precise.

3. Shorter Focal Length Lenses

On the other hand, a shorter focal length lens, such as a 10mm or 8mm lens, will allow you to cut thinner materials faster. This is because the laser beam will have a smaller point size at the material's surface, which increases the beam's energy density. A higher energy density means that the material will require fewer passes to cut through, but there's a higher risk of the cut being less precise and more jagged.

4. Different Materials, Different Lenses

When choosing a lens for your K40 laser, it's vital to consider the materials you plan to work with. For example, if you plan to cut through thick pieces of wood, you'll need a longer focal length lens to ensure the cut is clean and precise. On the other hand, if you plan to engrave detailed designs on thin pieces of acrylic, you'll need a shorter focal length lens to achieve the necessary detail.

5. Specialty Lenses

In addition to the standard lenses that come with the K40 laser, there are also specialty lenses available that can help you achieve unique results. For example, a cylindrical lens can be used to create 3D engravings on objects such as glassware or cylindrical objects. A concave lens can be used to engrave images onto curved surfaces, such as the back of a watch or a curved phone case.

Final Thoughts

When it comes to choosing the right lens for your K40 laser, it's essential to consider the materials you plan to work with and the types of cuts or engravings you'll be doing. While the 12mm focal length lens is suitable for most applications, it's worth investing in additional lenses as needed to achieve the best possible results. By selecting the right lens for each project, you'll be able to produce high-quality cuts and engravings that will impress your clients and customers.