Patent Number: 6,297,917

Title: Focusing device for an optical mechanism

Abstract: A focuser having a drawtube on which an eyepiece can be mounted, a track secured to the drawtube, and a base adapted to be mounted to an optical tube of a telescope. The base is movably engaged with the drawtube such that the drawtube and track are able to move relative to the base along an optical axis. A shaft is rotatably secured to the base and operatively engaged with the track such that rotation of the shaft effects movement of the drawtube relative to the base. This, in turn, results in relative movement between the eyepiece and optical tube along the optical axis, so as to focus the telescope. The drawtube, track and base are configured such that the base applies a first force to the drawtube and a second opposing force to the track to align the drawtube and track as they move along the optical axis.

Inventors: Burr; James D. (Evergreen, CO)

Assignee:

International Classification: G02B 7/04 (20060101); G02B 007/02 (); G02B 015/14 ()

Expiration Date: 10/02/2018