Patent
1978-12-08
1980-06-17
Henry, Jon W.
350 79, G02B 2100, G02B 722
Patent
active
042080894
ABSTRACT:
An intravital microscope and, more particularly, a barrel assembly therefor comprising: a supporting structure; telescopically interconnected upper, intermediate and lower tubes carried by the supporting structure and defining an optical axis, the upper tube being axially movably mounted on the supporting structure, the intermediate tube being axially movable relative to the upper tube, and the lower tube being axially movable relative to the intermediate tube; interengageable stops on the lower and intermediate tubes for limiting downward movement of the lower tube relative to the intermediate tube; a first lock for locking the lower tube relative to the intermediate tube; a second lock for locking the intermediate tube relative to the upper tube; and a rack and pinion system for raising and lowering the upper tube. The barrel assembly includes a counterbalancing system for the tubes. An optical system carried by the lower tube and the supporting structure transmits an image from an objective carried by the lower tube, above a field in an object plane, to a beam receiver carried by the supporting structure laterally of the axis of the barrel assembly, which beam receiver may be a television camera, a recording camera, or an eyepiece. The field of view may be illuminated in various ways.
REFERENCES:
patent: 2705490 (1955-04-01), Littmann
patent: 3464137 (1969-09-01), England
Henry Jon W.
University of Southern California
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