Plano-concave lens

plano-concave lens

Diameter tolerance

+0.00 / -0.12 mm

Thickness tolerance

±0.2 mm

Clear aperture

90%

Surface quality

40 – 20 scratch & dig

Surface irregularity

λ/4 @ 633 nm

Specification
Material Ge, CaF2, ZnSe, Si, Optical glass, Fused silica

Plano-concave lenses are optical lenses with one flat (plano) surface and one concave surface. 

plano-concave lens
Difference from Plano-convex Lenses:
  • Shape: Plano-convex lenses have one flat and one convex surface, while plano-concave lenses have one flat and one concave surface.
  • Function: Plano-convex lenses converge light to a focal point, while plano-concave lenses diverge light.

Usage:

  1. Diverging Light: Plano-concave lenses are primarily used to diverge light. When parallel rays of light pass through the lens, they spread out after passing through the concave surface.

  2. Beam Expansion: They are utilized to expand a beam of light. This application is particularly useful in laser systems or optical setups where a wider beam diameter is required.

Applications:

YREMOptics plano-concave lenses are employed in various fields, including:

  • Laser Technology: Used to expand laser beams or adjust their divergence.
  • Optical Instruments: Employed in telescopes, microscopes, and other optical instruments for correcting aberrations or modifying beam paths.