Patent ID: 7532394
Filing Date: 2009-05-12
Classification: G02B

Abstract:
1. A binocular optics system having a first and a second barrel arranged with center axes parallel, the second barrel a duplicate of the first barrel, each barrel having an objective end and an ocular end, and comprising: a light converging objective lens assembly of two meniscus lenses, each of at least 2.0 inches diameter with a maximum thickness no more than 0.5 inches, the two meniscus lenses in the assembly spaced apart by a gap of no more than 0.5 inches and both arranged convex toward the objective end; a light converging field lens positioned in the optical path at least 3.0 inches toward the ocular end from the objective lens assembly, the field lens also a meniscus lens and having a diameter to thickness ratio of about 4:1; and a strongly light diverging ocular lens at the ocular end; wherein the two barrels are joined in a manner that fixes separation distance of the two axes, such that there is no adjustment for eye separation, and the lenses are fixed in position along the optical axes, such that there is no adjustment for focus.