Abstract

The Cooke triplet consists of three separated lenses positioned at the finite distance. It is often considered that the triplet is one of the most important discoveries in the field of photographic objectives. It is designed by Harold Dennis Taylor in 1893. The Cooke triplet is named after the firm in which H. D. Taylor worked at that time. The Cooke triplet is a very interesting objective for application because it joined the simplicity of construction (it consists of only three lenses) and the possibility of complete aberration correction (it has enough potential variable construction parameters to correct the basic chromatic aberrations and all five primary monochromatic aberrations: the spherical aberration, the coma, the astigmatism, the field curvature and the distortion).

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