Optical: systems and elements – Lens – With variable magnification
Patent
1993-12-13
1997-06-03
Epps, Georgia Y.
Optical: systems and elements
Lens
With variable magnification
359823, G02B 702
Patent
active
056360622
ABSTRACT:
Disclosed is an apparatus for driving a lens, having first and second movable lens groups movable along an optic-axis direction, a crank member for moving the first and second movable lens groups along the optic-axis direction in a predetermined mutual relationship, a first moving member for moving the first movable lens group along the optic-axis direction by a force received from the crank member, a second moving member for moving the second movable lens group along the optic-axis direction by the force received by the crank member and a compensating device, disposed between the second movable lens group and the second moving member, for compensating a deviation quantity of the second movable lens group from a predetermined moving quantity.
REFERENCES:
patent: 3051048 (1962-08-01), Mahn
Murakami Koutarou
Nozaki Hirotake
Okuyama Takeshi
Epps Georgia Y.
Nikon Corporation
Robbins Thomas
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