{"title":"Longpass Filters","description":"\u003cp\u003eLongpass filters for blocking short wavelengths and fundamental rejection.\u003c\/p\u003e","products":[{"product_id":"silicon-reflective-longpass-filter-12-5mm-1050nm-od3","title":"Silicon Reflective Longpass Filter, Ø12.5 mm, 1050 nm, OD 3.0","description":"\u003ch2\u003eOverview\u003c\/h2\u003e\n\u003cp\u003eLongpass filters provide a sharp cut-on at a specific wavelength. Widely used for order sorting, they isolate broad spectral regions while transmitting the desired energy and blocking unwanted light. Built on an IR-transmitting optical substrate coated with a hard, durable outer-surface dielectric film, they withstand routine cleaning and suit any high-quality optical assembly — making them especially well suited to FTIR spectroscopy and thermal imaging. Coatings are available on silicon or germanium substrates.\u003c\/p\u003e\n\n\u003ch2\u003eApplications\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eFTIR spectroscopy\u003c\/li\u003e\n  \u003cli\u003eThermal imaging\u003c\/li\u003e\n  \u003cli\u003eOrder sorting \u0026amp; spectral-region isolation\u003c\/li\u003e\n  \u003cli\u003eMid-IR \u0026amp; laser systems\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 Silicon\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoating:\u003c\/strong\u003e Dielectric Coating (reflective longpass)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e Ø12.5 mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThickness:\u003c\/strong\u003e 1.0 mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStart wavelength:\u003c\/strong\u003e 1050 nm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOD:\u003c\/strong\u003e 3.0\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTransmission:\u003c\/strong\u003e \u0026gt;85%\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBlocking range:\u003c\/strong\u003e 200–1050 nm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePassband:\u003c\/strong\u003e 1100–2100 nm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoating spec:\u003c\/strong\u003e HR@200-1050 nm, T\u0026gt;85%@1150 nm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eClear aperture:\u003c\/strong\u003e 90%\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eParallelism:\u003c\/strong\u003e \u0026lt;10 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 3–5 λ @ 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 coating.\u003c\/p\u003e\n","brand":"WaveQuanta","offers":[{"title":"Default Title","offer_id":48192975962266,"sku":"O-LPF-12.5-1.0-BL508","price":0.0,"currency_code":"SGD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0734\/6156\/3546\/files\/664687-longpass-main.png?v=1780463658"},{"product_id":"uvfs-reflective-longpass-filter-25-0mm-950nm-od5","title":"UVFS Reflective Longpass Filter, Ø25.0 mm, 950 nm, OD\u003e5.0","description":"\u003ch2\u003eOverview\u003c\/h2\u003e\n\u003cp\u003eHard-coated reflective longpass filters deliver sharp cut-on performance with optical density \u0026gt;5 in the blocking band and high transmission across the passband. Built on a UV fused silica substrate with a durable hard dielectric coating — essentially a modified quarter-wave stack that isolates the band by interference — they offer excellent environmental stability and long service life from a single substrate, and withstand the normal cleaning and handling of any high-quality optical component.\u003c\/p\u003e\n\n\u003ch2\u003eApplications\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eFluorescence \u0026amp; Raman spectroscopy\u003c\/li\u003e\n  \u003cli\u003eLaser-line \/ excitation rejection\u003c\/li\u003e\n  \u003cli\u003eSpectral band isolation\u003c\/li\u003e\n  \u003cli\u003eImaging \u0026amp; laser systems\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 UV Fused Silica\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoating:\u003c\/strong\u003e Hard Coating (reflective longpass)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e Ø25.0 mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThickness:\u003c\/strong\u003e 2.0 mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStart wavelength:\u003c\/strong\u003e 950 nm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOD:\u003c\/strong\u003e \u0026gt;5.0\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTransmission:\u003c\/strong\u003e \u0026gt;90%\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBlocking range:\u003c\/strong\u003e 200–938 nm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePassband:\u003c\/strong\u003e 962–2150 nm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoating spec:\u003c\/strong\u003e HR@200-938 nm, T\u0026gt;90%@950 nm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eClear aperture:\u003c\/strong\u003e 21.1 mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSurface quality:\u003c\/strong\u003e 40-20 Scratch-Dig\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSurface flatness:\u003c\/strong\u003e λ\/4 @ 633 nm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMounting:\u003c\/strong\u003e Black anodized aluminum ring\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall thickness (housed):\u003c\/strong\u003e 3.5 mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLaser damage threshold:\u003c\/strong\u003e 0.25 J\/cm² (1064 nm, 10 ns, 10 Hz, Ø1.010 mm)\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":48193086587034,"sku":"O-LPF-25.0-2.0-BL509","price":0.0,"currency_code":"SGD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0734\/6156\/3546\/files\/664688-longpass-main.png?v=1780464221"},{"product_id":"uvfs-reflective-longpass-filter-25-0mm-1000nm-od5","title":"UVFS Reflective Longpass Filter, Ø25.0 mm, 1000 nm, OD\u003e5.0","description":"\u003ch2\u003eOverview\u003c\/h2\u003e\n\u003cp\u003eHard-coated reflective longpass filters deliver sharp cut-on performance with optical density \u0026gt;5 in the blocking band and high transmission across the passband. Built on a UV fused silica substrate with a durable hard dielectric coating — essentially a modified quarter-wave stack that isolates the band by interference — they offer excellent environmental stability and long service life from a single substrate, and withstand the normal cleaning and handling of any high-quality optical component.\u003c\/p\u003e\n\n\u003ch2\u003eApplications\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eFluorescence \u0026amp; Raman spectroscopy\u003c\/li\u003e\n  \u003cli\u003eLaser-line \/ excitation rejection\u003c\/li\u003e\n  \u003cli\u003eSpectral band isolation\u003c\/li\u003e\n  \u003cli\u003eImaging \u0026amp; laser systems\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 UV Fused Silica\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoating:\u003c\/strong\u003e Hard Coating (reflective longpass)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e Ø25.0 mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThickness:\u003c\/strong\u003e 2.0 mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStart wavelength:\u003c\/strong\u003e 1000 nm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOD:\u003c\/strong\u003e \u0026gt;5.0\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTransmission:\u003c\/strong\u003e \u0026gt;90%\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBlocking range:\u003c\/strong\u003e 200–987 nm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePassband:\u003c\/strong\u003e 1013–2150 nm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoating spec:\u003c\/strong\u003e HR@200-987 nm, T\u0026gt;90%@1000 nm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eClear aperture:\u003c\/strong\u003e 21.1 mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSurface quality:\u003c\/strong\u003e 40-20 Scratch-Dig\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSurface flatness:\u003c\/strong\u003e λ\/4 @ 633 nm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMounting:\u003c\/strong\u003e Black anodized aluminum ring\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall thickness (housed):\u003c\/strong\u003e 3.5 mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLaser damage threshold:\u003c\/strong\u003e 3.75 J\/cm² (1064 nm, 10 ns, 10 Hz, Ø0.516 mm)\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":48193086914714,"sku":"O-LPF-25.0-2.0-BL510","price":0.0,"currency_code":"SGD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0734\/6156\/3546\/files\/664689-longpass-main.png?v=1780464243"},{"product_id":"uvfs-reflective-longpass-filter-25-0mm-1150nm-od5","title":"UVFS Reflective Longpass Filter, Ø25.0 mm, 1150 nm, OD\u003e5.0","description":"\u003ch2\u003eOverview\u003c\/h2\u003e\n\u003cp\u003eHard-coated reflective longpass filters deliver sharp cut-on performance with optical density \u0026gt;5 in the blocking band and high transmission across the passband. Built on a UV fused silica substrate with a durable hard dielectric coating — essentially a modified quarter-wave stack that isolates the band by interference — they offer excellent environmental stability and long service life from a single substrate, and withstand the normal cleaning and handling of any high-quality optical component.\u003c\/p\u003e\n\n\u003ch2\u003eApplications\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eFluorescence \u0026amp; Raman spectroscopy\u003c\/li\u003e\n  \u003cli\u003eLaser-line \/ excitation rejection\u003c\/li\u003e\n  \u003cli\u003eSpectral band isolation\u003c\/li\u003e\n  \u003cli\u003eImaging \u0026amp; laser systems\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 UV Fused Silica\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoating:\u003c\/strong\u003e Hard Coating (reflective longpass)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e Ø25.0 mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThickness:\u003c\/strong\u003e 2.0 mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStart wavelength:\u003c\/strong\u003e 1150 nm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOD:\u003c\/strong\u003e \u0026gt;5.0\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTransmission:\u003c\/strong\u003e \u0026gt;90%\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBlocking range:\u003c\/strong\u003e 200–1136 nm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePassband:\u003c\/strong\u003e 1164–2150 nm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoating spec:\u003c\/strong\u003e HR@200-1136 nm, T\u0026gt;90%@1150 nm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eClear aperture:\u003c\/strong\u003e 21.1 mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSurface quality:\u003c\/strong\u003e 40-20 Scratch-Dig\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSurface flatness:\u003c\/strong\u003e λ\/4 @ 633 nm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMounting:\u003c\/strong\u003e Black anodized aluminum ring\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall thickness (housed):\u003c\/strong\u003e 3.5 mm\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":48193087307930,"sku":"O-LPF-25.0-2.0-BL511","price":0.0,"currency_code":"SGD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0734\/6156\/3546\/files\/664690-longpass-main.png?v=1780464259"},{"product_id":"uvfs-reflective-longpass-filter-25-0mm-1200nm-od5","title":"UVFS Reflective Longpass Filter, Ø25.0 mm, 1200 nm, OD\u003e5.0","description":"\u003ch2\u003eOverview\u003c\/h2\u003e\n\u003cp\u003eHard-coated reflective longpass filters deliver sharp cut-on performance with optical density \u0026gt;5 in the blocking band and high transmission across the passband. Built on a UV fused silica substrate with a durable hard dielectric coating — essentially a modified quarter-wave stack that isolates the band by interference — they offer excellent environmental stability and long service life from a single substrate, and withstand the normal cleaning and handling of any high-quality optical component.\u003c\/p\u003e\n\n\u003ch2\u003eApplications\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eFluorescence \u0026amp; Raman spectroscopy\u003c\/li\u003e\n  \u003cli\u003eLaser-line \/ excitation rejection\u003c\/li\u003e\n  \u003cli\u003eSpectral band isolation\u003c\/li\u003e\n  \u003cli\u003eImaging \u0026amp; laser systems\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 UV Fused Silica\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoating:\u003c\/strong\u003e Hard Coating (reflective longpass)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e Ø25.0 mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThickness:\u003c\/strong\u003e 2.0 mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStart wavelength:\u003c\/strong\u003e 1200 nm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOD:\u003c\/strong\u003e \u0026gt;5.0\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTransmission:\u003c\/strong\u003e \u0026gt;90%\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBlocking range:\u003c\/strong\u003e 200–1185 nm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePassband:\u003c\/strong\u003e 1215–2150 nm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoating spec:\u003c\/strong\u003e HR@200-1185 nm, T\u0026gt;90%@1200 nm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eClear aperture:\u003c\/strong\u003e 21.1 mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSurface quality:\u003c\/strong\u003e 40-20 Scratch-Dig\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSurface flatness:\u003c\/strong\u003e λ\/4 @ 633 nm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMounting:\u003c\/strong\u003e Black anodized aluminum ring\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall thickness (housed):\u003c\/strong\u003e 3.5 mm\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":48193087504538,"sku":"O-LPF-25.0-2.0-BL512","price":0.0,"currency_code":"SGD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0734\/6156\/3546\/files\/664691-longpass-main.png?v=1780464274"},{"product_id":"og550-absorptive-longpass-filter-50-0x50-0mm-515nm-od5","title":"OG550 Absorptive Longpass Filter, 50.0 × 50.0 mm, 515 nm, OD\u003e5.0","description":"\u003ch2\u003eOverview\u003c\/h2\u003e\n\u003cp\u003eAbsorptive longpass filters transmit wavelengths longer than a defined cut-on while blocking shorter spectral components — ideal for removing excitation light, suppressing scattered background, and separating spectral bands. With high transmission and strong out-of-band blocking, they maintain stable spectral performance across a range of incidence conditions, making them well suited to fluorescence detection, Raman spectroscopy, infrared optics, and laser systems.\u003c\/p\u003e\n\n\u003ch2\u003eApplications\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eFluorescence \u0026amp; Raman spectroscopy\u003c\/li\u003e\n  \u003cli\u003eLaser-line \/ excitation rejection\u003c\/li\u003e\n  \u003cli\u003eSpectral band isolation\u003c\/li\u003e\n  \u003cli\u003eImaging \u0026amp; laser systems\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 OG550\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoating:\u003c\/strong\u003e Uncoated (absorptive longpass)\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\u003eStart wavelength:\u003c\/strong\u003e 515 nm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOD:\u003c\/strong\u003e \u0026gt;5.0\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTransmission:\u003c\/strong\u003e 90%\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBlocking range:\u003c\/strong\u003e 200–520 nm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePassband:\u003c\/strong\u003e 610–2500 nm\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 \u0026lt;2 λ @ 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":48193087963290,"sku":"O-LPF-50.0x50.0-2.0-BL513","price":0.0,"currency_code":"SGD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0734\/6156\/3546\/files\/664692-longpass-main.png?v=1780464288"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0734\/6156\/3546\/collections\/664687-longpass-main.png?v=1780535001","url":"https:\/\/waveqvanta.com\/collections\/wq-uo-longpass.oembed","provider":"WaveQuanta","version":"1.0","type":"link"}