K9 Plano Convex Lens Ø20.5mm with 35.36mm Focal Length for Optical Focusing X-P25D2X9703
High-quality K9 plano convex lens with a 20.5mm diameter and 35.36mm focal length. Made from premium K9 optical glass, this PCX lens offers excellent light focusing performance and low distortion. Ideal for laser systems, imaging, and beam shaping applications. Custom coatings and sizes available. Material: K9 Diameter:20.5mm Focal Length: 35.36mm A plano-convex lens—also known as a PCX lens or positive focusing lens—features one flat surface and one convex surface. This structure allows it to converge incoming light into a focal point, making it ideal for focusing, collimation, imaging, and illumination in optical systems. The K9 plano-convex lens provides stable optical performance, excellent clarity, and high transmission across the visible spectrum. It is suitable for scientific instruments, imaging systems, laser applications, and more. A plano-convex lens is used for focusing or collimating light, making it suitable for imaging, illumination, and laser applications. K9 glass offers excellent visible transmission, high hardness, and cost-effectiveness for general-purpose optics. AR coating helps reduce reflections and increase transmittance, recommended for laser or high-precision optical systems. Yes. We support custom diameter, focal length, coating, and surface accuracy according to customer requirements. FAQ / People Also AskQ1: What is a plano-convex lens used for?A plano-convex lens is used for focusing or collimating light, making it suitable for imaging, illumination, and laser applications. Q2: Why choose K9 glass?K9 glass offers excellent visible transmission, high hardness, and cost-effectiveness for general-purpose optics. Q3: Do I need AR coating?AR coating helps reduce reflections and increase transmittance, recommended for laser or high-precision optical systems. Q4: Can this lens be customized?Yes. We support custom diameter, focal length, coating, and surface accuracy according to customer requirements. How to Choose the Right Focusing Lens Focal Length: shorter focal length produces a tighter focus Diameter: larger lenses support higher energy Material: K9 for visible, fused silica for UV or laser Coating: AR coatings reduce reflection loss Surface Quality: impacts imaging performance & laser spot quality Application Needs: choose based on wavelength and energy level
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Overview
Specifications
| Parameter | Value |
|---|---|
| Material | K9 Optical Glass (Equivalent to BK7) |
| Diameter | 20.5 mm |
| Focal Length | 35.36 mm |
| Design Type | Plano-Convex (PCX) |
| Refractive Index nD | 1.5168 |
| Wavelength Range | 350–2000 nm |
| Surface Quality | 60-40 (20-10 optional) |
| Surface Accuracy | λ/4 or λ/10 optional |
| Coating Options | Uncoated / AR / HR / Custom |
| Customization | Diameter, focal length, coating, shape |
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