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High-Precision Plano-Concave Lenses from China Suppliers - Ideal for Optical Systems | Factory Direct
Product Description
Core Functions
- Beam Control: Negative focal length diverges collimated light for laser beam expansion (divergence 0.5–5°) or aberration compensation.
- Focal Length Adjustment: Combined with plano-convex lenses to extend focal length for long-range imaging or projection.
Technical Specifications
- Materials: N-BK7 Glass (high transmission in visible range 400–700nm, cost-effective); Fused Silica (broadband UV-NIR 190nm–2.1μm, low thermal expansion, laser damage-resistant); Custom Materials (Ge, ZnSe, CaF₂, MgF₂, etc.).
- Precision: Surface accuracy λ/4–λ/10 (@632.8nm), diameter tolerance ±0.05mm, center thickness ±0.1mm; Clear aperture >90%, scratch/dig 20/10 (upgradable to 10/5).
- Coatings: Single/Multi-layer AR (covers visible, NIR, or laser wavelengths, e.g., 1064nm, 10.6μm); High-LIDT Coatings (compatible with high-power lasers >500W).
Applications
- Laser Processing: Beam divergence control before fiber coupling to reduce energy density.
- Optical Imaging: Spherical aberration correction or field curvature compensation in telescopes/microscopes.
- Scientific Instruments: Focal length adjustment in interferometers and spectrometers.
Customization
- Aspheric concave design: Minimizes spherical aberration for uniform beam divergence.
- Non-standard dimensions: Diameter 1–300mm, radius of curvature 5–1000mm.
- Rapid prototyping: Standard materials in 5 business days, custom materials <3 weeks.
Differentiation Highlights
Material Versatility
Compatible with UV, visible, IR, and THz wavelengths for multi-scenario applications.
High-Power Compatibility
Fused silica with hard coatings supports CO₂ lasers (10.6μm) and YAG lasers (1064nm) at high energy levels.
Custom & OEM Process
Company introduction
Q&A
Q1
Are you a factory?
Yes, we are a professional manufacturer of optical components, we have more than 20 years experience in optical cold working.
Q2
Can I custom the products based on my requirement?
Yes, we can custom the material, specifications and optical coating for your optical components as your requirement.
Q3
How many days will samples be finished? How about mass products?
Generally, we need 1-2 days to finish the sample production. As for the mass products, it depends on your order quantity.
Q4
What's the delivery time?
(1) For inventory: the delivery time is 1-3 working days.
(2) For customized products: the delivery time is 7 to 25 working days According to the quantity.
(2) For customized products: the delivery time is 7 to 25 working days According to the quantity.
Q5
How do you control the quality?
More than four times quality inspect during production process, we can provide the Quality test report.
Q6
What is your payment term?
T/T or L/C, if you want any other way, please contact us.
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