SET OF PRISMS, PRISM HOLDER ARRANGEMENT AND ENDOSCOPE WITH A VARIABLE VIEWING DIRECTION

摘要

A set of prisms with a variable viewing direction including: three prisms; the first and third prisms each have a light entrance, mirror surface and light exit surfaces, the second prism has a beam path surface having light entrance and exit regions and at least two mirror surfaces, the first prism is pivoted relative to the second prism about an axis of rotation that runs through the mirror surface of the first prism and one of the at least two mirror surfaces of the second prism, and the third prism is immovably arranged with respect to the second prism, and the second prism is sectionally wider than the first and/or third prisms transversally to a beam path such that at least one lateral wider section of the single beam path surface of the second prism extends on at least one side beyond the light entrance surface of the third prism.

主权项

1. A set of prisms for an endoscope with a variable viewing direction, the set of prisms comprising:
a first prism, a second prism; and a third prism; wherein the first, second and third prisms together define a beam path passing through the first, second and third prisms; the first prism and the third prism each have a light entrance surface, a mirror surface and a light exit surface, and the second prism has a single beam path surface having a light entrance region and a light exit region and at least two mirror surfaces, the first prism can be pivoted with respect to the second prism about an axis of rotation that runs through the mirror surface of the first prism and one of the at least two mirror surfaces of the second prism, and the third prism is arranged in an immovable manner with respect to the second prism, and the second prism is configured at least sectionally wider than the first prism and/or the third prism transversally to a course of the beam path such that at least one lateral wider section of the single beam path surface of the second prism extends on at least one side beyond the light entrance surface of the third prism.