Zoom lens, image-pickup apparatus having the same, and image projection apparatus having the same

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 8970967
APP PUB NO 20140085513A1
SERIAL NO

14031718

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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The zoom lens includes, in order from an object side to an image side, a first lens unit having a negative refractive power, a rear unit including one or more lens units, a distance between every adjacent lens units varies during zooming, and an aperture diaphragm on the image side of the first lens unit, a combined focal length of the rear unit at a wide-angle end being positive. One lens unit LG on the object side of the aperture diaphragm is made of a solid material, and includes an optical element GnNL having a negative refractive power and another optical element having a positive refractive power, and the predetermined conditions are satisfied.

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Patent Owner(s)

  • CANON KABUSHIKI KAISHA

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Hiasa, Norihito Utsunomiya, JP 45 350
Tashiro, Yoshihisa Nikko, JP 37 413

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