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What applications are BK7/K9 optical glass suitable for?

Update Time:2026/4/28

BK7 and K9 optical glass are versatile materials suitable for a wide range of optical applications, thanks to their excellent optical properties, stability and machinability.

One of the most common applications of BK7 and K9 optical glass is in optical instruments such as cameras, microscopes, telescopes and binoculars. In cameras, they are used to make lenses that capture clear and sharp images. In microscopes, they are used for objective lenses and eyepieces that magnify small objects. In telescopes and binoculars, they are used for objective lenses and prisms that gather and focus light. These applications require high optical clarity and consistent performance, which BK7 and K9 optical glass can provide.

BK7 and K9 optical glass are also widely used in laser systems. They are used for optical windows, lenses, prisms and beam splitters that help to guide and focus laser beams. Their high transmittance ensures that the laser beam passes through the material with minimal loss, and their stability ensures consistent performance even under high-power laser conditions. Whether you are working with a low-power consumer laser or a high-power industrial laser system, BK7 and K9 optical glass can meet your requirements.

In the medical industry, BK7 and K9 optical glass are used in various medical devices such as endoscopes, surgical microscopes and diagnostic equipment. Their high optical clarity and biocompatibility make them suitable for applications that require clear imaging and contact with the human body. They are also used in laboratory equipment such as spectrometers and analytical instruments, where their stability and accuracy are critical for reliable results.

Industrial applications of BK7 and K9 optical glass include optical windows for industrial equipment, protective covers for sensors, and prisms for automation systems. They are also used in testing and measurement equipment, where their stability and accuracy are essential for reliable performance. In addition, they are used in the automotive industry for applications such as headlight lenses and sensor components.

BK7 and K9 optical glass are also used in consumer electronics such as smartphones, tablets and digital cameras. They are used for camera lenses, display protectors and other optical components that require high clarity and durability. Their cost-effectiveness and good performance make them a popular choice for consumer electronic applications.

In addition to these applications, BK7 and K9 optical glass can be customized to meet the specific requirements of various projects. Our factory provides customized BK7 and K9 optical glass parts, including cutting, polishing, coating and CNC machining services, to ensure that the components meet the exact specifications of your application. Whether you are working on a consumer product, an industrial project or a scientific research application, BK7 and K9 optical glass offer the performance, versatility and reliability you need.

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James Fu, Sales Director of FELIX OPTICAL GLASS, and a poster displaying contact information for an optical glass deep-processing factory.

James Fu, Sales Director of FELIX OPTICAL GLASS, and a poster displaying contact information for an optical glass deep-processing factory. 2

Learn more from our FAQ

What is the minimum order quantity for custom precision optical glass components?: FELIX OPTICAL GLASS offers highly flexible MOQs to support customer projects, including prototype testing, small-batch trial orders, and high-volume production. All products can be fully customized to your drawings, tolerances, and application standards. Please send us your specifications, and we will reply within 1-5 hours and provide an accurate quotation after careful evaluation within 1-2 days.

Can I get free glass samples for testing before bulk order?: Yes, our FELIX GLASS factory supports sample testing for a wide range of precision optical glass components and assemblies. The lead time for sample production is 3 to 7 working days. Please contact us today to arrange samples and obtain a customized solution that meets your needs.

What is the production lead time for custom optical glass components?: A: The production cycle for standard samples is 3-10 working days, while mass production requires 15-35 working days, depending on the complexity of the product and the order quantity. We provide reliable precision optical glass components and fast delivery services for orders from industries such as defense, industrial equipment, medical devices, shipbuilding, robotics, automotive, and aerospace. Please submit your project details so we can provide you with an accurate delivery schedule.

Are your optical glass products ISO, CE and RoHS certified?: All precision optical glass components from FELIX OPTICAL GLASS comply with ISO quality system standards as well as CE and RoHS requirements. We provide comprehensive test reports, spectral graphs, material certificates, and inspection documents for customer review. Please feel free to request complete certification details and a formal quotation at any time.

Do you offer one-stop custom optical glass processing services?: Yes. We offer a full range of precision optical glass component processing services, including CNC machining, precision grinding, optical polishing, chemical/physical tempering, vacuum coating (AR anti-reflective coating, AF anti-fingerprint coating, AG anti-glare coating, IR infrared coating), and screen printing. From raw materials to finished products, every step is completed in our own factory. Please tell us your needs, and we will provide you with the most cost-effective solution.

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With 19 years of experience as a precision optical glass expert, we provide comprehensive and satisfactory customized solutions.

✔ROHS CE certified ISO9001:2005 quality management system
✔Professional team over 19 years’ experience under Japanese management system
✔Help over 2000+ companies to make prototypes into mass production successfully
✔Challenge the 100% on time delivery goal 100% full inspection report
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✔Support free samples (quick sample production) Small quantity (100-1000pcs) available

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