Optical: systems and elements – Compound lens system – Telescope
Patent
1998-05-12
1999-07-20
Nguyen, Thong
Optical: systems and elements
Compound lens system
Telescope
359480, G02B 2300, G02B 2702
Patent
active
059263121
ABSTRACT:
A kind of foldable binoculars includes a substantially L-shaped first bracket including a first bottom plate having a first side and a second side, and a first side plate defining two first viewing holes and having a first side extending from the second side of the first bottom plate and a second side. A substantially L-shaped second bracket includes a second bottom plate having a first side pivotally connected with the second side of the first side plate and a second side, and a second side plate defining two second viewing holes and having a first side extending from the second side of the second bottom plate and a second side pivotally connected with the first side of the first bottom plate. Two concave lenses are each mounted on a corresponding one of the two second viewing holes. An adjusting member is movably mounted between the first bracket and the second bracket and defines two third viewing holes each aligning with a corresponding one of the two first viewing holes and each aligning with a corresponding one of the two second viewing holes. Two convex lenses are each detachably mounted on a corresponding one of the two third viewing holes.
REFERENCES:
patent: 2002782 (1935-05-01), Lester
patent: 4964709 (1990-10-01), Hoeptner
patent: 5206757 (1993-04-01), Cheng et al.
patent: 5483301 (1996-01-01), Clarke
Nguyen Thong
Robinson Mark A.
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