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China, Chinese Dia38.1mm 350-2000nm Uncoated Bk7 Optical Glass Window Optical N-Bk7 Window1 Industrial Products Supplier Manufacturer Details, price list catalog:
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Optical Lens InstrumentOptical MirrorOptical WindowBk7 Window
Band Optics Technology
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Product DescriptionProduct DescriptionN-BK7 Precision Windows – standard grade summary1. Optical ? Refractive index: n_d = 1.5168 @ 587.6 nm (d-line, 23 °C)? Abbe number: ν_d = 64.2 → low chromatic aberration? Internal transmittance: ≥ 99.5 % per 10 mm thickness, 400–700 nm? Useful range: 350 nm – 2.5 μm (UV–VIS–NIR)2. Physical ? Density: 2.51 g cm-3? Knoop hardness: 520 HK100? Young's modulus: 82 GPa? Poisson's ratio: 0.206? Thermal expansion: 7.1 × 10-6K-1 (20 – 300 °C)? Homogeneity: Δn ≤ 1 × 10-5 (striae-free, Class 1 per ISO 12123)3. Surface Quality ? Standard polish: 20-10 scratch-dig (MIL-PRF-13830B)? Typical flatness: λ/10 @ 633 nm over 90 % CA? Surface roughness: ≤ 1 nm RMS (optional ≤ 0.3 nm RMS super-polish)? Bevel: 0.2 mm × 45 ° protective bevel on OD4. Coatings (optional single-side or dual-side) ? Broadband AR: R_avg ≤ 0.5 %, 400–700 nm, AOI = 0°? Dual-band AR: R ≤ 0.25 % @ 532 nm & 1064 nm? V-coat: R ≤ 0.1 % at any single wavelength 350–2000 nm? High-damage threshold: 10 J cm-2, 10 ns, 1064 nm (typical)Standard diameters: 5 mm – 150 mmThicknesses: 0.5 mm – 25 mm (aspect ratio ≥ 20:1 achievable)Clear aperture: ≥ 85 % of central diameterOperating temperature: –50 °C to +250 °C (higher on request)RoHS & REACH compliant; laser-grade bubble class 0–1 per ISO 10110-3.Need a tighter spec (λ/20 flatness, 5- scratch-dig, or ultra-low absorption for cw kW-level use)? Let me know and I'll generate the upgraded line.Application FieldsMain application areas for N-BK7 windows1. Imaging SystemsCameras: N-BK7 windows are used in camera systems to ensure high-quality image capture. They feature high optical transmittance and low dispersion, effectively reducing chromatic aberration and providing clear, sharp images. Microscopes: In microscopes, N-BK7 windows ensure precise light transmission and minimal optical distortion, which is crucial for accurate observation and analysis. Telescopes: Used for observing distant objects, N-BK7 windows provide clear, aberration-free visual effects, enhancing the performance of telescopes. 2. Laser SystemsLaser Optics: N-BK7 windows are extensively used in laser systems to protect sensitive optical components from damage while ensuring efficient laser beam transmission. Their high optical quality and low dispersion characteristics make them ideal for precision laser applications. 3. Scientific InstrumentsSpectrometers: N-BK7 windows are used in spectrometers to provide stable optical performance and durability, ensuring the accuracy of analytical measurements. Interferometers: In interferometers, N-BK7 windows offer a clear optical path while protecting internal components from dust, moisture, and other contaminants. 4. Medical DevicesEndoscopes: N-BK7 windows are used in medical endoscopes to transmit light, ensuring the sterility and integrity of the device, while providing clear images. Surgical Lasers: In surgical lasers, N-BK7 windows protect sensitive components and ensure efficient light transmission, enhancing surgical precision and safety. 5. Industrial ApplicationsMetrology Equipment: N-BK7 windows are used in precision measuring equipment to provide high-quality optical components, ensuring measurement accuracy. Sensors: In sensor applications, N-BK7 windows transmit light to and from the sensing elements, protecting them from harsh external environments and enhancing sensor performance and reliability.SpecificationMaterial:N-BK7Dimensions:from 2mm to 1200mm, customized according to requirementsThickness0.17 to 50mm (subject to dimensions)Dimension/Thickness Tolerance:up to 0.02mmParallelism:up to 3arcsecFlatness:up to 1/10L PV@633nmSurface Quality:up to 10-5Clear Aperture:>90% centeredCoatings:AR coating from UV-IRRelated ProductsInspectionsProduction LineCompany HistoryFAQQ: What are your main products?A: Optical Components: Aspherical Lenses, Spherical Lenses, Cylindrial Lenses, Lens Assemblies, Optical Windows, Optical Mirrors, Optical Prisms, Optical Filters, and Other Special Shaped Optics...... Q: What's your MOQ?A: Normally one piece. If more, we can talk about discount. You can ship with other parts together .Q: How about the delivery time?A: For stocks, within one week after the payment. As to customized products, the delivery time will be negotiated according to your requirements. Q: Can i get a sample to check the quality?A: YES, we are glad to provide samples for your test. And there is discount for Trade Assurance Sample Order. Q: Can you offer OEM service?A: YES. We will custom the material, specifications and optical coatings for your optical components as your requirements. Q: How to pay?A: T/T, L/C, Western Union, Cash, Credit Card, Paypal, Alipay, MoneyGram, Assurance payment...... Q: What's the way of shipping?A: We accept DHL, Fedex, TNT, UPS, EMS, SF and etc. If you have your own express number, it's great. Q: How to guarantee the quality of your products? A: 1) Strict detection during each production process. 2) Advanced metrology solutions: ZYGO, Mitutoyo, Agilent, TAYLOR HOBSON, TRIOPTICS, MOELLER-WEDEL.....3) Strict inspection on products before shipment and intact product packaging ensured. Q: Any other good service your company can provide?A: 24-hour after-sale service and long-time maintenance......Accepted delivery terms: FOB, CIF, EXW, DDU, DDP, Express..... Accepted payment currencies: USD, EUR, RMB...... Accepted Languages: English, Japanese, Chinese, Spanish, Russian.....
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