Feature:1. Adopt domestic zinc selenide, the light transmittance is 99.5%, the coating is firm and durable2. Widely used in laser processing and is an indispensable accessory for laser engraving machines, laser marking machines, and laser cutting machines3. The focusing lens is the optical path accessory of laser machine. After the reflecting lens is used to focus the beam, finally achieve the purpose of engraving or cutting4. The substrate of the silicon reflective lens is silicon with good optical and thermal properties. After the reflective film is coated on the surface of the silicon, its reflectivity can be greatly improved, about 99%, and the loss of light caused by reflection is almost avoided5. Possess good optical thermal properties, high reflectivity, goldplated film with scratch resistance. Adapt to work in harsh environments with long service lifeSpecification:Item Type: Laser Lens SetLaser Reflective Mirror: Material: SiliconCoating Band: 10.6mDiameter Tolerance: +0/-0.1mmThickness Tolerance: 0.1mmSurface Type: /2per1in DiaSurface Quality: 40-20Diameter: Approx. 20mm / 0.8inThickness: Approx. 3mm / 0.1inApplicable Power: 60W-300W (high power)Laser Focusing Lens: Material: Zinc SelenideFocal Length: Approx. 50.8mm / 2in, 63.5mm / 2.5inDiameter: Approx. 20mm / 0.8inThickness: Approx. 2mm / 0.1inScope of Application: Laser focusing lens is widely used in laser processing and is an indispensable accessory for laser engraving machine, laser marking machine and laser cutting machineThe focusing lens is the optical path accessory of the laser machine. Used to focus the beam after reflecting the lens to achieve the purpose of engraving or cuttingHow to Use: 1. For cutting leather, wood boards and other dusty environments, wipe it at least once a day. Use a cotton swab to wipe gently from the inside to the outside. Wait for evaporate before processing.2. After replacing the focusing lens, you need to fine-tune the focusing lens barrel up and down to see which height is the smallest..Package List:3 x Reflective Mirror1 x Focusing LensNote:1. Install in the laser head with the concave surface facing down and the convex surface facing up.2. Depending on the specific usage, wipe 1 or 2 times a day: use a cotton swab or lens cleaning paper, gently rotate the wipe from the inside to the outside, and then process after evaporates.3. The laser hits the edge of the lens and the junction of the lens barrel, which is easy to crack.