Title:
An imaging device which has a zoom lens and it
Document Type and Number:
Japanese Patent JP6261299
Kind Code:
B2
Abstract:
A zoom lens includes, in order from an object side to an image side, a first lens unit having positive refractive power, a second lens unit having negative refractive power, a third lens unit having positive refractive power, and a rear lens group including one or more lens units. An interval between adjacent lens units is changed in zooming, the first lens unit is moved closer to the object side at a telephoto end than at a wide-angle end. The first lens unit includes at least four lenses. An Abbe number and a material of a positive lens included in the first lens unit satisfy predetermined values. And, a focal length f1 of the first lens unit, and an amount of movement M1 of the first lens unit at zooming from the wide-angle end to the telephoto end are appropriately set.
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Inventors:
Daisuke Ito
Application Number:
JP2013245002A
Publication Date:
January 17, 2018
Filing Date:
November 27, 2013
Export Citation:
Assignee:
Canon Inc
International Classes:
G02B15/20; G02B13/18
Domestic Patent References:
| JP2010266791A | ||||
| JP2015102690A | ||||
| JP2014021367A | ||||
| JP2011053297A | ||||
| JP2013152371A | ||||
| JP2011085909A |
Foreign References:
| WO2015075943A1 |
Attorney, Agent or Firm:
Takuma Abe
Sogo Kuroiwa
Sogo Kuroiwa