Negative  Meniscus Convex-­Concave Lens

Specifications

Material: BK7, FS, UVFS, CaF2, ZnSe, Ge, H-K9L
Diameter: 3 mm
Available Focal Lengths: -100mm to -1000mm
Available Diameters: 3mm to 200mm
Surface Roughness (Scratch & Dig): 80/50 to 20/10
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Features


  • Focal Length Range: Available from -100.0 to -1000.0 mm

  • Focal Length Tolerance: ±1%

  • Diameter Range: 3.0 mm to 200.0 mm

  • Scratch & Dig: 80/50 to 20/10

  • Spherical Surface Power: 5 Fringes to 1 Fringe

  • Spherical Surface Irregularity: λ/2 to λ/8

  • Center Error: 5 arc minutes to 30 arc seconds

  • Design Purpose: Minimizes spherical aberration in optical systems

  • Combination Use: Increases focal length and decreases numerical aperture (NA) when combined with another lens

  • Divergence Application: Convex surface should face the beam to minimize spherical aberration when used to diverge light

  • Focal Length Calculation: f = (R1 * R2) / ((n - 1) * (R2 - R1)), where n is the index of refraction, and R1, R2 are the radii of curvature for each surface of the lens

  • Coating Options: Can be coated with MgF2 for surface protection or AR coated to increase transmission

Applications


  • Beam Expansion Systems: Used to increase beam diameter in optical setups

  • Laser Divergence Applications: Ensures controlled divergence with minimal aberration

  • Optical Imaging Systems: Extends focal length while preserving image quality

  • Research & Development: Suitable for experimental setups requiring precise divergence control

  • Optical Instrumentation: Integrated into instruments requiring negative focal lengths and high accuracy