Achromatic Glasses. Achromatic refers to a particular telescope design using two elements - one of crown glass and one of flint glass. These companies offer a comprehensive range of Lenses as well as a variety of related products and services.
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Polarized Photochromic Driving z87 Sunglasses For Men Women Day and Night safety glasses. The concave element of the doublet is composed of flint glass with higher dispersion. At its most basic it is a two lens system configuration where one lens is a concave lens usually made of a flint glass and the other is a convex element usually made with crown glass.
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It is also known as Achromat. Data from the Schott glass catalog for these normal glasses are shown in the table below. ED refers to a range of types of glass which can be used instead of a crown glass element to improve performance. Aspherical achromatic lenses consist of two cemented elements which provide superior color correction and the smallest RMS spot size closest to the diffraction limit.
