Achromatic Triplets - Doublets and Triplets - BTMT | Beijing Trans Manufacture and Trade Co., Ltd.

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Achromatic Triplets

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

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