Patent ID: 9746660
Date: 2017-08-29
CPC Classifications: G02B

Claim:
1. A binocular viewing instrument for providing a magnified stereoscopic image of an object to a user comprising a first telescope and a second telescope, said first telescope and said second telescope being mounted side by side, said first telescope and said second telescope each comprising a. an objective lens, b. an eyepiece lens, said eyepiece lens having an optical axis and an exit pupil, said exit pupil being located on the eyepiece optical axis at a predetermined distance behind said eyepiece, and c. a wedge prism, said wedge prism having an apex and a base, said wedge prism being mounted after said eyepiece lens on said optical axis, said wedge prism being mounted before said exit pupil wherein the wedge prisms are oriented such that i. the base of the wedge prism in said first telescope faces the base of the wedge prism in said second telescope in order to bend the optical axes of the first telescope's eyepiece lens and the second telescope's eyepiece lens towards each other such that the apparent convergence angle β associated with the stereoscopic view of an object located at a short distance in front of the binocular viewing instrument is reduced, or ii. the apex of the wedge prism in said first telescope faces the apex of the wedge prism in said second telescope in order to bend the optical axes of the first telescope's eyepiece lens and the second telescope's eyepiece lens away from each other such that the apparent convergence angle β associated with the stereoscopic view of an object located at a far distance in front of the binocular viewing instrument is increased.