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Achromatic Triplets

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  • These achromatic triplets consist of a low-index, symmetrical convex crown glass elements which are cemented between two identical high-index meniscus flint glass elements. These lenses are reversible because they are symmetrical.

Specificatins

Material : Crown, Flint
Focal Length Tolerance: ±2%
Diameter Tolerance: +0/-0.1mm
Thickness Tolerance: ±0.2mm
Surface Flatness: λ/4
Centration Error: <3 arcmin
Surface Quality: 40/20
Clear Aperture: >90% of central diameter
Coating: According to the requirements