Optical: systems and elements – Barrel end eye guard
Patent
1997-10-24
1999-02-09
Nguyen, Thong
Optical: systems and elements
Barrel end eye guard
359368, 359611, G02B 2316, G02B 2100
Patent
active
058702261
ABSTRACT:
A microscope has an eyepiece detachably/attachably inserted in a tube eyepiece mounting portion. The eyepiece has an elastic cover, whose inside protrusion portion is fitted to a peripheral groove at a position between an eyelet and a joint portion of the eyepiece with the mounting portion. The cover extends from the joint portion and sheathes over the mounting portion. An inner diameter of the elastic cover is smaller than an outer diameter of the mounting portion at the joint portion. Thus the elastic cover can shield the joint portion with reliability and no fine particle can intrude into the microscope.
REFERENCES:
patent: 2418298 (1947-04-01), French
patent: 4307931 (1981-12-01), Blake
patent: 4566789 (1986-01-01), Weber
patent: 5198929 (1993-03-01), Clough
patent: 5225932 (1993-07-01), Wannagot et al.
Nguyen Thong
Nikon Corporation
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