Auxiliary lens attachment for an optical device

Details Auxiliary lens attachment for an optical device Auxiliary lens attachment for an optical device

1997-01-07

1998-11-10

Epps, Georgia

Optical: systems and elements

Lens

With support

G02B 702

Patent

active

058352899

ABSTRACT:
An auxiliary lens attachment (22) for an optical device (10) is removably positioned between an eyepiece (12) and an objective lens (19). The auxiliary attachment (22) includes a cylindrical prescription lens (30) which corrects an astigmatism in the eye of the user. The auxiliary lens attachment (22) is rotated with the eyepiece (12) relative to the objective lens (19) for positioning the auxiliary attachment (22) at a precise rotational position relative to objection lens (19) for correction of the astigmatism.

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"Gleanings For ATM'S", R.F. Cox and R.W. Sinnott,Nov., 1976, Sky and Telescope, pp. 376-381.

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