Custom Plano-Concave Lenses

Plano-Concave Lenses have edges that are thicker than the center and flat on
one side. Plano-concave lenses are used to expand a light beam or increase
the focal length in an optical system. They are commonly used for beam
expansion of high peak power pulsed lasers. The beam incident on the concave
surface will be focused to a point outside the instrument.
Unwanted air heating and ionization at the focal point may accompany mode
disruption or material damage. To avoid this problem, the input lens should
be inverted so that the concave surface is not facing the parallel beam.
Material selection: optical glass, laser crystal, fused silica, anti-
radiation glass, infrared and ultraviolet materials, metal materials
Strict dimensional control standards
custom coating
Wide selection of RZ spherical lenses made of N-BK7, UVFS or CaF2 optical
materials, spherical lenses made of N-BK7, UVFS or S-LAH64 optical
materials, cylinders and cones (shafts) made of N-BK7 and UVFS cone) lens.
The lens forms are plano-convex, plano-concave, double-convex, double-
concave, plano-convex cylinder and plano-concave cylinder. Focal lengths
vary from -5000 to +10000 mm.
Other specific materials, sizes and anti-reflective (AR) coated lenses are
available upon request.
Factory Standard
Shape: Plano-Concave
Diameter Tolerance: ± 0.05mm
Thickness Tolerance: ± 0.05mm
Radius: ± 0.3%
Focal Length Tolerance: ± 1%
Surface Quality: 40-20 Scratch-Dig(After Coating)
Surface Flatness: λ/4 @633 nm
Centration: < 3 arc minutes
Clear Aperture: > 95% of central dimension

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