High-Precision Plano-Concave Lens for Optical Systems

●Product Description

‌‌‌Core Functions‌
‌Beam Control‌: Negative focal length diverges collimated light for laser beam expansion (divergence ‌0.5–5°‌) or aberration compensation‌1.
‌Focal Length Adjustment‌: Combined with plano-convex lenses to extend focal length for long-range imaging or projection‌2.

‌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: Infrared substrates (Ge, ZnSe), fluorides (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

Materials capabilities

Coating capabilities

Advanced Equipment

Custom Sizes and Shapes

Quality Assurancetesting

Experienced Team 

●Company introduction

●Q&A

Q1:Are you a factory?
Yes, we are a professional manufacturer of optical components, we have more than20 years experience in optical cold working.
 
Q2:What is the MOQ of your products?
No MOQ for customer if our productis in stock,or 1-10pcs.
 
Q3: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.
 
Q4:How canI get sample from you?
Just send us your requirements, then we will send samples accordingly.
 
Q5: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.
 
Q6: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.
 
Q7:How do you controlthe quality?
More than four times quality inspect during production process, we can provide the Quality test report.
 
Q8:How about your optical lens production ability per Month?
About 20000pcs/Month.According to the detail requirement.
 
Q9:What is your payment term? 
T/T or L/C,if you want any other way,please contact us.

●freight

●payment