Description
Double Concave Cylindrical Lenses – Precision Beam Divergence & Line Width Control
Description:
Double Concave Cylindrical Lenses feature two symmetric concave cylindrical surfaces, which diverge collimated light along a single axis to expand the beam width or spread a laser line. This symmetric design minimizes wavefront distortion and provides consistent divergence characteristics, making them ideal for applications requiring precise control over beam divergence or line shaping without introducing astigmatism.
Materials:
BK7 / H-K9L: Standard optical glass for VIS-NIR applications
Fused Silica: High UV transmittance and laser damage threshold for UV and high-power laser systems
Sapphire: High hardness and thermal stability for harsh industrial environments
Key Features:
Uniaxial beam divergence without affecting orthogonal light propagation
Low wavefront distortion and high surface accuracy
Customizable focal length to achieve precise beam expansion ratios
Compatibility with a wide range of anti-reflection coatings for maximum transmittance
Edge treatment options to prevent chipping and improve handling
Key Specifications:
Size (Length × Width): 2mm × 2mm – 150mm × 150mm
Focal Length: Customizable from -5mm to -5000mm
Surface Quality: 60/40, 40/20, 20/10, 10/5
Surface Accuracy: λ/4 @ 633nm, λ/10 @ 633nm
Parallelism: ≤ 1 arcmin (standard), ≤ 30 arcsec (precision)
Coating Options: UV/VIS/NIR AR coatings, BBAR coatings
Applications:
Laser beam expanders & collimators
Optical fiber coupling systems
Projection displays & laser scanners
Laboratory research & optical testing
Medical laser therapy devices
Custom service:
We can manufacture lenses to your exact specifications, including custom focal lengths, non-standard dimensions, special edge treatments, and wavelength-specific coatings. Send us your technical parameters or drawings for a fast quotation.
