Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
July 24, 2007
Patent Application Number
11123946
Date Filed
May 5, 2005
Patent Primary Examiner
Patent abstract
Two reflective surfaces disposed in a predetermined angular orientation inside the optical tube assembly of a telescope intercept the optical beam and deliver it from the objective to the eye-piece. By translating these surfaces simultaneously along the axis bisecting the angle between them, the separation between the focal points of the objective and the eye-piece is adjusted as required to re-focus the telescope in a continuous and reversible fashion without changing its overall dimensions.
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