Zoom lens

A zoom lens to form an image of an object with variable magnification, is provided with a first lens group having a positive refracting power, and a second lens group positioned closer to the image than the first lens group and having a negative refracting power. When the magnification is changed, a...

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Bibliographic Details
Main Authors OTA, KOHEI, SATO, MASAE, YOKOTA, MINORU
Format Patent
LanguageEnglish
French
German
Published 18.08.2004
Edition7
Subjects
OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
OPTICS
PHYSICS
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Summary:A zoom lens to form an image of an object with variable magnification, is provided with a first lens group having a positive refracting power, and a second lens group positioned closer to the image than the first lens group and having a negative refracting power. When the magnification is changed, a distance between the first lens group and the second lens group is changed. The first lens group comprises a 1-1 lens, a 1-2 lens and a 1-3 lens aligned in this order from the object. The zoom lens comprises at least two plastic lenses.
Bibliography:Application Number: EP20000109552