Optical: systems and elements – Lens – With variable magnification
Patent
1996-10-02
1998-06-09
Epps, Georgia Y.
Optical: systems and elements
Lens
With variable magnification
359819, G02B 1514
Patent
active
057644241
ABSTRACT:
An attachment lens system (10) to adjust magnification has a housing (20) with an optical system (22). The housing (20) has a mechanism (36) to secure it to a stereo visual system (12) and to position the housing (20) in front of the stereo visual optical system. The optical system (22) is an afocal system including at least two lenses (90, 92) which are adjustable to adjust focal length of the entire system. Also the housing (20) includes a mechanism (24) to lock the lenses (90, 92) in position once they have been adjusted.
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Harrington David L.
Horst Lee S.
Jaeger Randy L.
Epps Georgia Y.
McDonnell Douglas Corporation
Robbins Thomas
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