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Symmrtric-concave Spherical Lenses

Symmetric concave lenses are manufactured with both concave surfaces. They have negative focal lengths. These lenses are often used to expand light or to increase focal lengths in existing systems. Also, they can be used in laser beam expander, optical characterreaders, viewers, and projection systems..
  • Material

    Crown, Flint, UVFS
  • Focal Length Tolerance

    ± 0.5%
  • Diameter Tolerance

  • Thickness Tolerance

    ± 0.2mm
  • Surface Flatness

  • Centration Error

    <3 arcmin
  • Surface Quality

  • Clear Aperture

    >90% of central diameter
  • Coating

    According to the requirements

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