Positive Achromatic Doublet Lens

Positive Achromatic Doublet Lens

The most common type of achromat is the achromatic doublet, which is composed of two individual lenses made from glasses with different amounts of dispersion. Typically, one element is a negative (concave) element made out of flint glass such as F2, which has relatively high dispersion, and the other is a positive (convex) element made of crown glass such as BK7, which has lower dispersion. The lens elements are mounted next to each other, often cemented together, and shaped so that the chromatic aberration of one is counterbalanced by that of the other.

Technical Specifications:

Material	BK7,ZF2
Dimension	30mm 50mm circular
Dimension Tolerance	+/-0.15mm
Centration	<3'
Surface Quality	60/40
Flatness	lambda/4 per 25nm at 632.8nm
Focal length	+/-3%
Edge	Fine ground and beveled
Coating	Anti-Reflective (AR) Coatings,Single layer MgF2 coating,Multilayer Broadband AR Coating

Custom Made Drawing As Following

Factory Show

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Product Categories : Optical Lens > Achromatic Lens