# Plano concave lenses

Plano concave lenses have negative focal lengths with twice the radius of curvature. They produce virtual images, which can be seen through the lens. They diverge a collimated beam and vice versa. As with plano convex lenses spherical aberration is lowest, when the concave surface faces a collimated beam.

## Contact

Staffan Eriksson

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Contact

Quantum Design GmbH

Roddarestigen 3
SE 182 35 Danderyd
Sweden

 Phone: +46 8 41071791 E-mail: nordic@qd-europe.com
Staffan ErikssonSales Manager
 +46 8 410 71791 eriksson@qd-europe.com