{"product_id":"110mm-k9-optical-glass-biconvex-lens-diy-projector-science","title":"110mm K9 Optical Glass Biconvex Lens – DIY Projector \u0026 Science","description":"\u003ch2\u003e110mm K9 Optical Glass Biconvex Lens – Perfect for DIY Projectors \u0026amp; Science Experiments\u003c\/h2\u003e\n\u003cp\u003eUpgrade your optics projects with this premium \u003cstrong\u003e110mm Biconvex Lens\u003c\/strong\u003e crafted from high-clarity \u003cstrong\u003eK9 Optical Glass\u003c\/strong\u003e. Featuring a \u003cstrong\u003e5× magnification\u003c\/strong\u003e and a 110mm effective diameter, this handheld lens delivers sharp, distortion-free imaging — ideal for building your own projector, conducting physics experiments, or industrial inspection applications.\u003c\/p\u003e\n\n\u003cp\u003eWhether you're a student, educator, hobbyist, or optical engineer, this versatile biconvex lens offers professional-grade performance at an accessible price. Its lightweight, handheld design makes it easy to position and use in a wide variety of setups.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHigh-Quality K9 Optical Glass\u003c\/strong\u003e – Superior light transmission and minimal chromatic aberration for crisp, clear imaging\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e110mm Effective Diameter\u003c\/strong\u003e – Wide aperture captures more light for brighter, sharper projections and magnification\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e5× Magnification\u003c\/strong\u003e – Powerful enough for detailed observation and effective DIY projector builds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBiconvex Design\u003c\/strong\u003e – Converges light efficiently, making it ideal for projectors, condensers, and optical experiments\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCE Certified\u003c\/strong\u003e – Meets European safety and quality standards\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNo Light Source Required\u003c\/strong\u003e – Works with natural or ambient light; no batteries or power needed\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHandheld Style\u003c\/strong\u003e – Easy to handle, position, and integrate into custom optical builds\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e K9 Optical Glass\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEffective Diameter:\u003c\/strong\u003e 110mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMagnification:\u003c\/strong\u003e 5×\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStyle:\u003c\/strong\u003e Handheld\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLight Source:\u003c\/strong\u003e None\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCertification:\u003c\/strong\u003e CE\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMade in:\u003c\/strong\u003e Mainland China\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003ePerfect For\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eDIY and self-made projector builds\u003c\/li\u003e\n  \u003cli\u003ePhysics and optics classroom experiments\u003c\/li\u003e\n  \u003cli\u003eIndustrial and technical inspection\u003c\/li\u003e\n  \u003cli\u003eOptical research and prototyping\u003c\/li\u003e\n  \u003cli\u003eScience fair projects\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eRelated Products You Might Like\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/electromagnetic-induction-tester-coil-motherboard-fault-detector\"\u003eElectromagnetic Induction Tester – Coil \u0026amp; Circuit Fault Detector\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/air-compressor-pressure-gauge-0-10-0-12-0-25-bar-hydraulic-diy\"\u003eAir Compressor Pressure Gauge 0-10\/0-12\/0-25 Bar | DIY Tool\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eLearn more: \u003ca href=\"https:\/\/www.osha.gov\/personal-protective-equipment\" target=\"_blank\" rel=\"noopener\"\u003eOSHA on personal protective equipment\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: What is a K9 optical glass biconvex lens used for?\u003c\/h4\u003e\n\u003cp\u003eA: A K9 optical glass biconvex lens is used in a wide range of applications including DIY projector builds, physics and optics experiments, industrial inspection, and scientific research. Its biconvex shape converges light to a focal point, making it excellent for focusing, magnifying, and projecting images. The 110mm diameter and 5× magnification of this lens make it particularly well-suited for self-made projector projects and classroom demonstrations.\u003c\/p\u003e\n\u003ch4\u003eQ: What makes K9 optical glass better than regular glass for lenses?\u003c\/h4\u003e\n\u003cp\u003eA: K9 optical glass is a high-quality borosilicate crown glass known for its exceptional clarity, low dispersion, and high light transmittance. Compared to standard glass, K9 optical glass produces sharper images with less chromatic aberration (color fringing), making it the preferred choice for optics experiments, projectors, and precision instruments.\u003c\/p\u003e\n\u003ch4\u003eQ: Can this 110mm biconvex lens be used to build a DIY projector at home?\u003c\/h4\u003e\n\u003cp\u003eA: Yes! This 110mm K9 optical glass biconvex lens is specifically suitable for self-made (DIY) projector builds. Its 110mm effective diameter gathers ample light, while the 5× magnification helps project enlarged, clear images. It works with a variety of light sources you may already have at home, making it a popular choice for hobbyists and science enthusiasts building their own projection systems.\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What is a K9 optical glass biconvex lens used for?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"A K9 optical glass biconvex lens is used in a wide range of applications including DIY projector builds, physics and optics experiments, industrial inspection, and scientific research. Its biconvex shape converges light to a focal point, making it excellent for focusing, magnifying, and projecting images. 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