Imaging lens including seven lenses of +−+0+−−, +−+0−+−or +−+0++−refractive powers

Number of patents in Portfolio can not be more than 2000

United States of America

PATENT NO 11988816
APP PUB NO 20210373296A1
SERIAL NO

17391968

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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There is provided an imaging lens with excellent optical characteristics which satisfies demand of wide field of view, low-profileness and low F-number. An imaging lens comprises, in order from an object side to an image side, a first lens with positive refractive power having an object-side surface being convex in a paraxial region, a second lens with negative refractive power in a paraxial region, a third lens, a fourth lens being a double-sided aspheric lens, a fifth lens, a sixth lens having an image-side surface being concave in a paraxial region, and a seventh lens with negative refractive power having an image-side surface being concave in a paraxial region, wherein the image-side surface of the seventh lens is an aspheric surface having at least one pole point in a position off the optical axis, and predetermined conditional expressions are satisfied.

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Patent Owner(s)

  • TOKYO VISIONARY OPTICS CO., LTD.

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Nitta, Koji Tokyo, JP 159 352

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