Patent ID: 7701653

Claim:
A prismatic joint for an optical swiveling device, comprising: a first prism rotatably mounted about a first rotation axis; a second prism rotatably mounted about a second rotation axis relative to said first prism; said first rotation axis and said second rotation axis intersecting at an intersection angle of 45°; said first prism and said second prism each having a first side surface, a second side surface, and a base surface; said first side surface of each of said first and second prisms being inclined with respect to said base surface by said intersection angle, and said second side surface of each of said first and second prisms being inclined through half the intersection angle with respect to said base surface; a third prism having a base surface and side surfaces inclined symmetrically at said intersection angle with respect to said base surface; and said first and second prisms projecting substantially mirror-image symmetrically along said first rotation axis, and said third prism being arranged between said first and second prisms, in each case with said side surfaces adjoining said first and second prisms, respectively.