Patent ID: 7072124
Filing Date: 2006-07-04
Classification: G02B,G02C

Abstract:
1. A magnification loupe carried by a user wearable device, comprising: a housing having a first end with a first aperture for supporting an eyepiece lens, and a second end with a second aperture for supporting an objective lens; an eyepiece lens disposed in said first end of said housing; and an objective lens disposed in said second end of said housing; said objective lens having a non-circular shape, wherein at least two oppositely disposed arcuate first peripheral edges are defined by a first radius extending from a first center, and wherein at least two oppositely disposed arcuate second peripheral edges are defined by at least one second radius extending from at least a second center not coincident with said first center, said second radius having a length different from said first radius; said eyepiece lens comprising a single lens element; said objective lens comprising two lens elements; wherein said eyepiece lens and said objective lens are constructed and arranged according to the following parameters: wherein the radius, thickness, and separation dimensions are given in millimeters; Roman numerals identify the lens elements in their respective order from an eyepoint side to an object side and element I is a representative correction lens; η d represents the refractive index of each element; η d is the abbe dispersion number; R 1 –R 8 represent the radii of respective refractive surfaces in order, from the eyepoint side to the object side; D 1 –D 4 represent the maximum clear lens aperture diameters of parent lens elements; and S 1 , S 2 represent the air space between the elements, measured along an optical centerline.