Patent ID: 6163413
Filing Date: 2000-12-19
Classification: G02B,G02C,Y10S

Abstract:
A light-weight magnification viewer for use with a pair of spectacles comprising: a pair of lens barrels, each of said lens barrels supporting a one element negative eyepiece lens and a two element objective lens forming a doublet, said eyepiece lens and said doublet objective lens for magnifying images, said doublet objective lens having a positive element and a negative element, wherein said negative element of said doublet, and no other element, is formed from a light weight high index glass having a specific gravity of less than 5 grams per cubic centimeter for reducing weight of said doublet, and said negative and positive elements of said objective lens having indices of refraction that differ by more than 15%; and means for mounting said pair of lens barrels to a pair of spectacles for providing higher image quality to a user.