US 2008/0304148 A1Published application

Binoculars having diopter adjustment

AssigneeFujinon Corporation

InventorsTakaharu Kobayashi, Takemi Seo

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Abstract

Binoculars include first and second lens barrels. A bridge interconnects the lens barrels. First and second optical systems are accommodated in respectively the lens barrels. First and second focus lenses are included in respectively the first and second optical systems, for focus adjustment by moving in an optical axis direction. An operation barrel is secured to the bridge, and externally rotatable and movable in the optical axis direction between a focus adjusting position and a diopter adjusting position. A focus adjuster with gear teeth and screw threads moves the first and second focus lenses simultaneously in the optical axis direction when the operation barrel is rotated in the focus adjusting position. A diopter adjuster, including gear teeth, an intermediate rod and screw threads, moves the second focus lens in the optical axis direction when the operation barrel is rotated in the diopter adjusting position.

Claims11

Dependent claims

Binoculars including first and second lens barrels, a bridge for interconnecting said first and second lens barrels, and first and second optical systems accommodated in respectively said first and second lens barrels, said binoculars comprising:

first and second focus lenses, included in respectively said first and second optical systems, and movable in an optical axis direction;
an operation device, secured to said bridge, movable in said optical axis direction between a focus adjusting position and a diopter adjusting position, and rotatable in each of said focus adjusting position and said diopter adjusting position;
a focus adjuster for moving said first and second focus lenses simultaneously in said optical axis direction for focus adjustment when said operation device is rotated in said focus adjusting position;
and
a diopter adjuster for moving said second focus lens in said optical axis direction for diopter adjustment when said operation device is rotated in said diopter adjusting position.

2 more elements

Dependencies are inferred from the claim text.