Plossl type eyepiece for use in astronomical instruments

Details Plossl type eyepiece for use in astronomical instruments Plossl type eyepiece for use in astronomical instruments

1983-02-18

1984-11-13

Corbin, John K.

350479, G02B 300, G02B 2500

Patent

active

044822170

ABSTRACT:
A Plossl type eyepiece for astronomical instruments in which the external flint elements of the symmetrical achromatic doublets are double concave elements.

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