Description
Double Concave Lenses – Beam Divergence & Collimation Control
Detailed Description:
Double Concave Lenses have two symmetric concave spherical surfaces, diverging collimated light and forming a virtual focal point. They are used to expand laser beams, adjust focal lengths, and control beam divergence in optical systems.
Key Specifications:
- Materials: BK7, Fused Silica, Sapphire
- Diameter: 2mm – 200mm
- Focal Length: Customizable negative values (-5mm to -5000mm)
- Surface Quality: 60/40, 40/20, 20/10
- Surface Accuracy: λ/4 @ 633nm
- Coating: AR coating (UV/VIS/NIR)
- Centering Error: ≤ 0.1mm
Applications:
Laser beam expanders, optical fiber coupling, projection systems, laboratory optics, medical lasers.
