Zoom lens and image pickup apparatus having the same

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 9398225
APP PUB NO 20150138401A1
SERIAL NO

14543563

Stats

ATTORNEY / AGENT: (SPONSORED)

Importance

Loading Importance Indicators... loading....

Abstract

See full text

A zoom lens including: a first lens unit having a positive refractive power, a second lens unit having a negative refractive power, a third lens unit having a positive refractive power, a fourth lens unit having a negative refractive power, and a fifth lens unit having a positive refractive power in this order from an object side to an image side. During zooming, the lens units move such that an interval between adjacent lens units varies. The third lens unit includes at least two positive lenses. A partial dispersion ratio (θgF3P) of a material and the Abbe number (νd3P) of a positive lens included in the third lens unit satisfy the following conditional expressions,

description='In-line Formulae' end='lead'θgF3P−(−1.665×10−7·νd3P3+5.213×10−5·νd3P2−5.656×10−3·νd3P+0.737)>0description='In-line Formulae' end='tail'

description='In-line Formulae' end='lead'50.0<νd3P<100.0.description='In-line Formulae' end='tail'

Loading the Abstract Image... loading....

First Claim

See full text

Family

Loading Family data... loading....

Patent Owner(s)

Patent OwnerAddress
CANON KABUSHIKI KAISHATOKYO JAPAN DAEJEON 3 MEATBALLS 30 2 TOKYO TOKYO METROPOLIS

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Fujisaki, Toyokatsu Utsunomiya, JP 23 143

Cited Art Landscape

Load Citation

Patent Citation Ranking

Forward Cite Landscape

Load Citation

Maintenance Fees

Fee Large entity fee small entity fee micro entity fee due date
7.5 Year Payment $3600.00 $1800.00 $900.00 Jan 19, 2024
11.5 Year Payment $7400.00 $3700.00 $1850.00 Jan 19, 2028
Fee Large entity fee small entity fee micro entity fee
Surcharge - 7.5 year - Late payment within 6 months $160.00 $80.00 $40.00
Surcharge - 11.5 year - Late payment within 6 months $160.00 $80.00 $40.00
Surcharge after expiration - Late payment is unavoidable $700.00 $350.00 $175.00
Surcharge after expiration - Late payment is unintentional $1,640.00 $820.00 $410.00