Optical: systems and elements – Lens – With variable magnification
Patent
1991-12-02
1994-03-01
Arnold, Bruce Y.
Optical: systems and elements
Lens
With variable magnification
359694, 359823, G02B 1514, G02B 702
Patent
active
052913350
ABSTRACT:
An optical equipment is equipped with a compact and high precision lens position detector which has a lens holder guide member which is made of a conductor and is provided with a detection electrode for detecting the position of the lens holder by a change in an electrical capacitance.
REFERENCES:
patent: 4534624 (1985-08-01), Toda et al.
patent: 4785210 (1988-11-01), Maruyama et al.
Arnold Bruce Y.
Canon Kabushiki Kaisha
Nguyen Thong
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