What Is a Plano-Convex Spherical Lens?
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.
Product 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 |
Pictures of Plano Convex Lens
Key Features
- High-quality K9 optical glass with excellent visible transmission
- Positive focal length for focusing and collimation
- Low wavefront distortion for precise imaging
- Optional AR coatings for improved transmittance
- Suitable for low-power laser applications
- OEM/ODM customization supported
Applications
- Laser focusing & beam shaping
- Imaging and vision systems
- Illumination devices
- Optical instruments & scientific tools
- Laboratory experiments
Detailed Video of Plano Convex Lens
Advantages of Choosing VY Optics’ PCX Lenses
- Precision CNC grinding and polishing
- Stable material performance and consistency
- Fast lead time for prototypes and mass production
- Custom shapes, coatings, and dimensions
- Professional engineering and optical support
FAQ / People Also Ask
Q1: 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
