Medical Definition of Huygenian eyepiece

1. An under corrected (blue rim at periphery of field) ocular designed by Huygens for the telescope and later adopted for achromatic objectives. This ocular consists of two plano-convex lenses separated by a diaphragm, hence it is of the negative type with the focal plane inside the system. Both plane surfaces face the eye, as distinguished from the Ramsden eyepiece. (05 Aug 1998)

Lexicographical Neighbors of Huygenian Eyepiece

Hutson
Hutt
Hutterite
Hutterites
Hutton
Huttonian
Hutu
Huws
Huxleian
Huxley
Huxley's layer
Huxley's membrane
Huxley's sheath
Huxleyan
Huya
Huygenian eyepiece (current term)
Huygens
Huygens' ocular
Huygens' principle
Huygens' principle of superposition
Huyghenian
Hwang Ho
Hx
Hyacinth
Hyacinthaceae
Hyacinthian
Hyacinthoides
Hyacinthoides nonscripta
Hyacinthus
Hyacinthus candicans

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