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| Introduced in | 1893 |
|---|---|
| Author | Dennis Taylor |
| Construction | 3 elements in 3 groups |
| Aperture | f/3.5 (early) f/2.8 (rare-earth optical glass) |
The Cooke triplet is a photographic lens designed and patented in 1893 by Dennis Taylor who was employed as chief engineer by T. Cooke & Sons of York. It was the first lens system that allowed the elimination of most of the optical distortion or aberration at the outer edge of the image.[citation needed]
The Cooke triplet is noted for being able to correct the five Seidel aberrations.[1] The compound lens design consists of three air-spaced simple lens elements: two biconvex (positive) lenses surrounding a biconcave (negative) lens in the middle.[2] It is one of the most important objective designs in the history of photography.[2]
- ^ Kidger, Michael J. (2002). Fundamental Optical Design. SPIE Press. ISBN 9780819439154.
- ^ a b Vasiljević, Darko (2002). "13: The Cooke triplet optimizations". Classical and Evolutionary Algorithms in the Optimization of Optical Systems. Springer US. pp. 187–211. doi:10.1007/978-1-4615-1051-2_13. ISBN 9781461510512.