The Triplet configuration is used in two ways. The three lenses may be cemented together, as in the Steinheil triplet. Or a triplet may be designed with three spaced glasses, e.g. the Cooke triplet. The former has the advantage of higher optical throughput due to fewer air-glass interfaces, but the latter provides greater flexibility in aberration control, as the internal surfaces are not confined to have the same radii of curvature.Typically a symmetrical optics design, these lenses are excellent when used at 1 to 1 magnification and have a wider field of view than cemented doublets. They also find wide range applications in optical relay systems.
|Triplet Lenses||These lenses have considerably reduced values of spherical aberrations. Best used to replace single components where performance must be improved.||Combinations of Two Optical Grade Glasses|
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