{"product_id":"upper-laser-protective-lens-for-laser-cutting-head-d25-4x4-副本","title":"Upper Laser Protective Lens for Laser Cutting Head D21.5x2","description":"\u003cp\u003e✅ JGS1 high-purity fused quartz substrate with excellent thermal stability; withstands thermal shock during prolonged continuous cutting at 15 kW and is resistant to cracking\u003cbr\u003e✅ Double-sided hard AR anti-reflective coating with high transmittance at 1064 nm; minimizes laser energy loss to ensure cutting speed and cut-face quality\u003cbr\u003e✅ Strong coating adhesion resists metal spatter and allows for light cleaning, reducing burn marks on the lenses and lowering the cost of frequent replacements\u003cbr\u003e✅ Precision optical polishing with strict dimensional tolerances ensures stable coaxiality of the optical path, blocks molten slag, and protects internal focusing and collimating lenses\u003cbr\u003e✅ Suitable for sheet metal processing of carbon steel, stainless steel, and aluminum—including thin, medium, and thick sheets—and is a cost-effective consumable commonly stocked in factories\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eDiameter: 21.5mm\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eThickness: 2 mm,\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eModel: D21.5T2-4\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eD21.5 = 21.5 mm diameter; T2 = 2 mm thickness; -4 = Compatible with fiber lasers up to 15 kW; first piece in the upper drawer of the cutting head (upper protective lens) Model    D21.5T2-4 (upper protective lens)\u003cbr\u003eBaochu Original Material Code    P.S.B0041 Shanghai Baochu Electric...\u003cbr\u003eDimensions    Φ21.5 mm × Thickness 2 mm\u003cbr\u003eBase Material    High-purity fused silica\u003cbr\u003eApplicable Wavelength    1030–1080 nm (1064 nm for fiber lasers)\u003cbr\u003eCoating    Double-sided high-damage-threshold AR anti-reflective coating, resistant to spatter contamination\u003cbr\u003eTransmittance    \u0026gt;99.9% @1064 nm\u003cbr\u003eMaximum Power Handling    ≤15 kW fiber laser Shanghai Bochu Electric...\u003cbr\u003eDimensional Tolerances    Diameter ±0.01 mm; Thickness ±0.01 mm; Parallelism ≤10″\u003cbr\u003eInstallation Location    Upper drawer of the cutting head, first piece (Upper-1)\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eCompatible with BLT420\/BLT420S\/BLT421\/BLT421T\/BLT44F\/BLT441\/BLT441T\/BLT641\/BLT641H\/BLT640\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eModel: D21.5T2-6\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eD21.5 = Diameter 21.5 mm; T2 = Thickness 2 mm; -6 = Compatible with fiber lasers up to 20 kW; first piece in the upper drawer of the cutting head (upper protective lens); Model: D21.5T2-6 (upper protective lens)\u003cbr\u003eBochu Original Part Number: DP.V.P0001AA\u003cbr\u003eDimensions    Φ21.5 mm × Thickness 2 mm\u003cbr\u003eBase Material    High-purity fused silica\u003cbr\u003eApplicable Wavelength    1030–1080 nm (1064 nm for fiber lasers)\u003cbr\u003eCoating    Double-sided high-damage-threshold AR anti-reflective coating, resistant to spatter contamination\u003cbr\u003eTransmittance    \u0026gt;99.9% @1064 nm\u003cbr\u003eMaximum Power Handling    ≤20 kW fiber laser\u003cbr\u003eDimensional Tolerances    Diameter ±0.01 mm; Thickness ±0.01 mm; Parallelism ≤10″\u003cbr\u003eInstallation Location    Upper drawer of the cutting head, first piece (Upper-1)\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eCompatible with BLT460F\/BLT461\/BLT661\/BLT661H\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Fabpartsdepot","offers":[{"title":"D21.5T2-4","offer_id":67666144985363,"sku":"1010702.00154","price":0.0,"currency_code":"AUD","in_stock":false},{"title":"D21.5T2-6","offer_id":67666145018131,"sku":"1010702.00041","price":0.0,"currency_code":"AUD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0994\/5835\/1379\/files\/1_c314e7fe-5b67-4e79-975b-89d330594ea6.png?v=1793006058","url":"https:\/\/au.fabpartsdepot.com\/products\/upper-laser-protective-lens-for-laser-cutting-head-d25-4x4-%e5%89%af%e6%9c%ac","provider":"Fabpartsdepot","version":"1.0","type":"link"}