Optical: systems and elements – Lens – With viewed object or viewed field illumination
Patent
1998-08-07
1999-12-07
Epps, Georgia
Optical: systems and elements
Lens
With viewed object or viewed field illumination
359802, 359822, G02B 702
Patent
active
059993391
ABSTRACT:
A hand-held viewer for producing a magnified image of an object has a pivotable and swivelable object mount so that an object of interest may be positioned in a plurality of orientations within the viewable area and at different distances from the lens. One presently preferred object mount comprises a yoke with spaced apart arms having slots running along their length for mounting a microscope slide or a photographic slide such as film strips or 35 mm positives. The hand-held viewer desirably includes a detachable background screen assembly to provide a contrasting background against which to view the photographic slide or other object. In a preferred embodiment, the lens may be focused by rotating a thumb-wheel within and extending partially through the body of the viewer.
REFERENCES:
patent: 4192580 (1980-03-01), Meyer
patent: 4737016 (1988-04-01), Russell et al.
patent: 5130853 (1992-07-01), Sakurai
patent: 5844714 (1998-12-01), DiResta
Kam Wai Hing
Siu Yau Chung
Toriumi Eric
Epps Georgia
Learning Resources, Inc.
Mack Ricky
Saret Larry L.
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