Eye cup adjustment device for optical apparatus such as binoculars
AssigneesNikon Vision Co., Ltd., Nikon Corporation
InventorMitsuo Yamamoto
Life of this patent
Estimating the term…
Abstract
An eyepiece member comprises an eye cup provided on the outer circumference of an eyepiece barrel that holds an eyepiece lens, the eye cup being movable relative to the eyepiece barrel along the direction of the optical axis of the eyepiece lens, and a positioning members for the eye cup provided on at least one of a portion of the eyepiece barrel and a portion of the eye cup that are opposed to each other, intervals of the positioning members being relatively smaller in the eye cup pull-out side in which the eye cup is pulled toward the user when used than in the eye cup push-in side.
Claims18
An eyepiece member, comprising:
- an eye cup provided on a circumference of an eyepiece barrel that holds an eyepiece lens, the eye cup being movable relative to said eyepiece barrel along a direction of an optical axis of said eyepiece lens,
- wherein there are at least four discrete stop positions of said eye cup at which a projection provided on one of a portion of said eyepiece barrel and a portion of said eye cup is received in a positioning stop member provided on the other of said portions,
- at least two of said stop positions are intermediate stop positions disposed closer to a most pulled-out position than to a most pushed-in position of said eye cup, and
- intervals between successive ones of said four stop positions increase in a direction from the most pulled-out position toward the most pushed-in position.
An eyepiece member, comprising:
- an eye cup provided on a circumference of an eyepiece barrel that holds an eyepiece lens, the eye cup being movable relative to said eyepiece barrel along a direction of an optical axis of said eyepiece lens,
- wherein a click-stop mechanism is provided which defines at least four stop positions of said eye cup,
- two or more of said stop positions are intermediate stop positions disposed closer to a most pulled-out position than to a most pushed-in position of said eye cup, and
- intervals between successive ones of said four stop positions increase in a direction from the most pulled-out position toward the most pushed-in position of said eye cup.
Dependencies are inferred from the claim text.