Feature:1. Using domestic zinc selenide, the light transmittance is 99.5%, the coating is firm and durable2. The focusing lens is widely used in processing and, an indispensable accessory for engraving machines, marking machines, and cutting machines3. The focusing lens is the optical path accessory of machine. Finally achieve the purpose of engraving or cutting after the reflecting lens is used to the beam4. The substrate of the silicon reflective lens is silicon, which has good optical and thermal properties. After the reflective film is coated on the surface of the silicon, greatly improved reflectivity, about 99%, and the loss of light caused by reflection is almost avoided5. Come with good optical thermal properties, high reflectivity, gold‑plated film with scratch resistance. Adapt to work in harsh environments with long service lifeSpecification:Item Type: Lens SetLaser Reflective Mirror: Material: SiliconCoating Band: 10.6μmDiameter Tolerance: +0/-0.1mmThickness Tolerance: ±0.1mmSurface Type: λ/2per1in DiaSurface Quality: 40-20Diameter: Approx. 25mm / 1inThickness: 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 processing and is an indispensable accessory for engraving machine, marking machine and cutting machineThe focusing lens is the optical path accessory of the machine. Used to the beam after reflecting the lens to achieve the purpose of engravin