Optical: systems and elements – Compound lens system – Telescope
Patent
1994-12-15
1997-10-14
Nguyen, Thong
Optical: systems and elements
Compound lens system
Telescope
359407, 359418, 359895, G02B 2300, G02B 500
Patent
active
056777892
ABSTRACT:
A binocular incorporates a focusing and diopter correction mechanism having a common shaft, whereby the diopter adjustment is performed by rotation of the shaft and the focusing operation is performed by axial movement of the shaft. The lens-moving portions of the focusing/diopter adjustment mechanism are in a cavity having an access hole, in which the shaft enters the access hole through a water-tight seal to control the lens-moving portions of the adjustment mechanism. The binocular also incorporates a strap attaching mechanism having a spring-loaded clip and groove, wherein a flanged pin provided to a strap end is pushed past the clip into the groove, and the clip returns under the bias of the spring to hold the flanged pin in the groove. Also included is an eyecup adjustment mechanism having two positions defined by click-stops, wherein the eyecups are not rotatable, but are longitudinally slidable relative to corresponding support barrels.
REFERENCES:
patent: 4205894 (1980-06-01), Filipovich et al.
patent: 4989963 (1991-02-01), Farnung et al.
patent: 5062698 (1991-11-01), Funathu
patent: 5066965 (1991-11-01), Tanaka et al.
patent: 5191471 (1993-03-01), Funathu
patent: 5212591 (1993-05-01), Funathu
patent: 5245731 (1993-09-01), Funathu
patent: 5267079 (1993-11-01), Riedl
patent: 5495364 (1996-02-01), Palmer
Asahi Kogaku Kogyo Kabushiki Kaisha
Nguyen Thong
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