{"product_id":"d20-x-4-5mm-f150-focusing-lens-sup-handheld-laser-welding-head","title":"D20 x 4.5mm F150 Focusing Lens — SUP20S, SUP21T \u0026 SUP23T Handheld Laser Welding Head Fit","description":"\u003cp\u003e\u003cstrong\u003eThe factory-spec F150 focusing lens for SUP handheld laser welding heads.\u003c\/strong\u003e This 20 x 4.5mm plano-convex focusing lens (also written D20x4.5 F150, D20*4.5 F150 or D20T4.5 F150) takes the parallel beam from the collimator and focuses it down to the weld spot. Made from fused silica (quartz) with dual-sided anti-reflective coating for 1064nm fibre lasers, it's the standard focal lens across the SUP20S, 20T, 21S, 21T, 23S and 23T welding heads. Also known as a focal lens or focus lens.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eDiameter: 20mm\u003c\/li\u003e\n\u003cli\u003eThickness: 4.5mm\u003c\/li\u003e\n\u003cli\u003eFocal length: 150mm (F150)\u003c\/li\u003e\n\u003cli\u003eSize notations: 20x4.5, 20*4.5, D20x4.5 F150, D20*4.5 F150, D20T4.5 F150\u003c\/li\u003e\n\u003cli\u003eMaterial: Fused silica (quartz)\u003c\/li\u003e\n\u003cli\u003eShape: Plano-convex\u003c\/li\u003e\n\u003cli\u003eCoating: Dual-sided anti-reflective for 1064nm fibre laser wavelength\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatible handheld \u0026amp; welding heads\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eSuper (SUP) SUP20S and SUP20T\u003c\/li\u003e\n\u003cli\u003eSuper (SUP) SUP21S and SUP21T\u003c\/li\u003e\n\u003cli\u003eSuper (SUP) SUP23S and SUP23T\u003c\/li\u003e\n\u003cli\u003eChaoqiang (CQWY) and SUP-pattern handheld welding heads that take a D20 x 4.5 F150 focusing lens\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatible machine brands\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\u003cli\u003eHandheld fibre laser welders fitted with a Super (SUP) or Chaoqiang (CQWY) welding head, common on 1kW to 3kW Chinese-built machines\u003c\/li\u003e\u003c\/ul\u003e\u003cp\u003eNote: this is the F150 welding lens. Cleaning heads such as the SUP22C and some special setups use longer focal lengths (F200 to F800), so check the marking on your current lens before ordering. Not sure if it fits your head? Send us your machine or head model and we'll confirm before you buy. Shipped fast Australia-wide from our Brisbane workshop.\u003c\/p\u003e","brand":"DK Machine Tech","offers":[{"title":"D20x4.5-F150","offer_id":43462303350883,"sku":"FL0001","price":77.85,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0638\/8508\/2723\/files\/ProtectiveWindow1_03dcba5b-6782-4de6-ab8f-9ffcf527799b.png?v=1750125978","url":"https:\/\/dkmachinetech.com\/products\/d20-x-4-5mm-f150-focusing-lens-sup-handheld-laser-welding-head","provider":"DK Machine Tech","version":"1.0","type":"link"}