{"product_id":"h-k9l-reflective-nd-filter-50x50mm-od0-3","title":"H-K9L Reflective ND Filter, 50.0 × 50.0 mm, OD 0.3","description":"\u003ch2\u003eOverview\u003c\/h2\u003e\n\u003cp\u003eReflective neutral density filters use high-quality K9 (BK7-equivalent) optical glass coated with a precisely controlled metallic reflective film (e.g. protected silver or aluminum). Attenuation is achieved primarily by reflection rather than bulk absorption, so absorbed energy is minimal — greatly reducing heating and thermal-lensing and yielding a higher laser-induced damage threshold. This makes them especially suitable for CW, high-power, and ultrafast laser systems. The broadband metallic coating (400–1100 nm) provides flat spectral attenuation across the visible to near-infrared.\u003c\/p\u003e\n\n\u003ch2\u003eApplications\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eCW \u0026amp; high-power laser attenuation\u003c\/li\u003e\n  \u003cli\u003eUltrafast laser power balancing\u003c\/li\u003e\n  \u003cli\u003eEnergy calibration \u0026amp; beam sampling\u003c\/li\u003e\n  \u003cli\u003eDetector protection\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eConstruction \u0026amp; Performance\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSubstrate:\u003c\/strong\u003e H-K9L (BK7-equivalent)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoating:\u003c\/strong\u003e Metallic Coating (HR@400-1100 nm)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e 50.0 × 50.0 mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThickness:\u003c\/strong\u003e 2.0 mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSpectral range:\u003c\/strong\u003e 400–1100 nm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOD:\u003c\/strong\u003e 0.3\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eClear aperture:\u003c\/strong\u003e \u0026gt;90%\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eParallelism:\u003c\/strong\u003e 5 arcmin\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSurface quality:\u003c\/strong\u003e 80-50\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSurface flatness:\u003c\/strong\u003e λ\/2 @ 633 nm\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eStorage \u0026amp; Handling\u003c\/h2\u003e\n\u003cp\u003eFor optimal performance, store and use at 25 °C and 40–60% relative humidity. If the surface becomes contaminated, clean gently with ≥99% alcohol and lint-free lens tissue; never use coarse cloth, water, or abrasive cleaners, which may damage the optic.\u003c\/p\u003e","brand":"WaveQuanta","offers":[{"title":"Default Title","offer_id":48194704507034,"sku":"O-NDF-50.0x50.0-2.0-BL531","price":0.0,"currency_code":"SGD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0734\/6156\/3546\/files\/664710-nd-main.png?v=1780478533","url":"https:\/\/waveqvanta.com\/products\/h-k9l-reflective-nd-filter-50x50mm-od0-3","provider":"WaveQuanta","version":"1.0","type":"link"}