With guaranteed low absorption (LA) and other unique characteristics, Our “Black Magic” CO2 laser meniscus lenses offer superior performance and longer lifetime. Meniscus lenses enable a smaller beam diameter and hence, a reduction in spherical aberration and less beam waste when precision cutting or marking with a CO2 laser.
Meniscus lens for smaller spot size
Black Magic™ coating with >99.35% transmission
High IR transmission Zinc Selenide (ZnSe) substrates
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blackmagic-meniscus-lenses - Drawings
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Specifications
Lens Shape
Positive Meniscus
Lens Material
Zinc Selenide (ZnSe)
Coating Type
Black Magic™
Absorption
<0.15%
Reflection
<0.25%
Transmission
>99.35%
Surface Figure
2 Fringes@ 0.633 µm
Surface Irregularity
0.5 Fringe @ 0.633 µm
Clear Aperture
≥ 90%
Diameter Tolerance
+0.0 /-0.1 mm
Edge Thickness Tolerance
± 0.1 mm
ETV
< 0.025 mm
Features
Meniscus Lenses
The positive meniscus directs a beam to one concentrated spot. A meniscus lens has one concave and one convex surface which enable a smaller beam diameter and hence, a reduction in spherical aberration and less beam waste when precision cutting or marking. The smaller spot size provided by the lens creates the same power output in a smaller area. To achieve the smallest possible spot size the concave side of the lens is mounted face down pointing towards the material being cut. Although meniscus lenses (right image) are more expensive when compared with Plano-Convex lenses (left image) the meniscus lens offers a higher accuracy of cut and hence, can increase cutting speeds by up to 5%.
CO2 Focusing Lens Coatings
Our standard Duralens™ AR coating features <0.2% absorption rate, HeNe transparency, a standard product lifetime, and a decent cost/benefit ratio. With guaranteed low absorption (LA) and other unique characteristics, the Black Magic™ coating has a lower absorption rate, but it is not transparent, although it is more durable with an extended product lifetime. The ultra low absorption (ULA) Clear Magic™ coating, as its name suggests, it transparent, and has an ultra-low absorption rate of <0.13%, as well as an extended product lifetime, but for a higher price. Both the Black Magic™ and the Clear Magic™ coatings are made from a radioactive-free coating.
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