Triplet lens

Triplet lens

A triplet lens is an optical device consisting of three single lenses. The triplet design is the simplest to give the required number of degrees of freedom to allow the lens designer to overcome all Seidel aberrations.

The term is used in two ways. The three lenses may be cemented together, as in the "Steinheil triplet". A triplet may also be a design with three spaced glasses, e.g. the Cooke triplet.


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  • Triplet de Cooke — Le triplet de Cooke est un objectif photographique mis au point par Harold Dennis Taylor en 1893, alors qu il travaillait chez Cooke of York, mais qui fut manufacturé après le dépôt de brevet par une autre entreprise, Taylor, Taylor and Hobson.… …   Wikipédia en Français

  • triplet — /trip lit/, n. 1. one of three children or offspring born at the same birth. 2. triplets, three offspring born at one birth. 3. any group or combination of three. 4. Pros. three successive verses or lines, esp. when rhyming and of the same… …   Universalium

  • triplet — 1. One of three children delivered at the same birth. SYN: tridymus. 2. A set of three similar objects, as a compound lens in a microscope, formed of three planoconvex lenses. 3. SYN: codon. nonsense t. 1. a trinucleotide (codon) …   Medical dictionary

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