Canon Kabushiki Kaisha

Shinji Yamasaki

Hiroki Nakayama

Akihiro Nishio

Shinichiro Saito

Takashi Sudo

Masakazu Kodaira

Tomonori Kimura

Kenta Sudo

Hirofumi Abe

Provided is the image pickup apparatus including an optical system forming an image of an object, an image pickup element receiving light from optical system, a driving unit driving at least one of an optical element included in optical system and image pickup element in a direction including a component of a direction perpendicular to an optical axis of optical system, and a determining unit performing first determination that driving unit is set to be in a non-driving state (NDS) or performing second determination that driving unit is set to be in a driving state (DS) based on information regarding object. When first determination is performed, determining unit outputs a signal for maintaining driving unit in NDS or switching driving unit from DS to NDS. When second determination is performed, determining unit outputs a signal for maintaining driving unit in DS or switching driving unit from NDS to DS.

Image pickup apparatus

A zoom lens includes, in order from object side, a negative first unit, a positive second unit, a negative third unit, and a positive fourth unit, wherein, for zooming to telephoto end, the second unit moves toward object side, the third unit moves and an interval between each pair of adjacent units is changed, wherein, at telephoto end as compared to wide angle end, the interval between the first and second units is smaller, the interval between the second and third units is larger, the interval between the third and fourth units is larger, and the fourth unit is positioned closer to image side, wherein the third unit consists of a single optical element, wherein the fourth unit includes plural lenses arranged at intervals, and wherein focal lengths of the third and fourth units and the interval between the third and fourth units at telephoto end are appropriately set.

Zoom lens, and image pickup apparatus and image pickup system including the zoom lens

Provided is an optical system according to the present invention, comprising a protection cover made of resin and a lens portion arranged in order from an object side to an image side, in which the protection cover includes an aspherical surface whose shape changes continuously from an optical axis to a peripheral portion, and where an effective diameter of the aspherical surface is represented as 2&#xd7;ha, a distance sagin a direction of the optical axis between the aspherical surface and a reference spherical surface of the aspherical surface at a position where the height from the optical axis is ha, and a thickness tc of the protection cover on the optical axis are appropriately set.

Optical system and image pickup apparatus having the same

A zoom lens includes, in order from an object side to an image side: a negative first lens unit; a negative second lens unit; and a positive third lens unit, in which the first lens unit is not moved for zooming, the second lens unit and the third lens unit are moved during zooming, and an interval between each pair of adjacent lens units is changed during zooming, in which the first lens unit includes at least two negative lenses, and a focal length of the first lens unit, a focal length of the zoom lens at a wide angle end, a focal length of the zoom lens at a telephoto end, an interval on an optical axis between the first lens unit and the second lens unit at the wide angle end, and a back focus at the wide angle end are appropriately set.

Zoom lens and image pickup apparatus including the same

A zoom lens includes in order from an object side: a first lens unit having a negative refractive power, and a second lens unit having a positive refractive power, wherein the first and second lens units move along respective loci different from each other during zooming; the first lens unit has two negative lenses arranged continuously from the object side; and a focal length of the first lens unit, a focal length of the second lens unit, a focal length of the zoom lens at a wide angle end, a focal length of a negative lens G11 arranged on most object side in the negative lenses contained in the first lens unit, and a focal length of a negative lens arranged on second most object side in the negative lenses contained in the first lens unit.

Zoom lens and image pickup apparatus having the same

Provided is a zoom lens, including, in order from an object side to an image side: a first lens unit having a positive refractive power; a second lens unit having a negative refractive power; and a third lens unit having a positive refractive power. In the zoom lens, during zooming, the first lens unit is configured not to move, and the second lens unit and the third lens unit are configured to move along mutually different loci, and a focal length (fw) of the zoom lens at a wide angle end, a focal length (ft) of the zoom lens at a telephoto end, a focal length (f2) of the second lens unit, and a focal length (f3) of the third lens unit are appropriately set.

In a zoom lens including, in order from an object side to an image side, 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, and a fourth lens unit having a positive refractive power, an appropriate setting is performed for each of the following: a movement locus for each lens unit; lateral magnifications &#x3b2;34w and &#x3b2;34t of a composite lens system of the third lens unit and the fourth lens unit at a wide angle end and at a telephoto end, respectively; lateral magnifications &#x3b2;2w and &#x3b2;2t of the second lens unit at the wide angle end and at the telephoto end, respectively; and lateral magnifications &#x3b2;3w and &#x3b2;3t of the third lens unit at the wide angle end and at the telephoto end, respectively.

In 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, and a fourth lens unit having a positive refractive power that are arranged in order from an object side to an image side, a movement locus of each of the lens units when zooming, a configuration of the second lens unit, a focal length of the second lens unit, a focal length of the third lens unit, and a focal length of the zoom lens at the wide angle end are set as appropriate.

A zoom lens is provided which has a wide angle of view and is bright and in which the entire lens system is compact and which can achieve high optical characteristic over the entire zoom range.

Zoom lens and image pickup device including the same

Provided is an image pickup apparatus including a zoos lens and a solid-state image pickup element. The zoom lens includes a first lens unit having a negative refractive power, an aperture stop, and a second lens unit having a positive refractive power. The first lens unit consists of a first lens sub-unit having a negative refractive power, which consists of two negative lenses, and a second lens sub-unit having a positive refractive power. The first lens unit and the second lens unit are configured to move in different loci for zooming. Each of a full-open f-number (Fnow) of the zoom lens, a focal length of the zoom lens, a focal length of the first lens sub-unit, and a pixel pitch (P) of the solid-state image pickup element is appropriately set.

A zoom lens includes, in order from an object side toward an image side, 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, and a fourth lens unit having a positive refractive power. The second lens unit, the third lens unit, and the fourth lens unit are moved during zooming. A position of the third lens unit at a telephoto end is closer to the object side than a position of the third lens unit at a wide-angle end. The focal length of the zoom lens at the wide-angle end, the difference in the position of the second lens unit on an optical axis between that at the wide-angle end and that at the telephoto end, and the focal length of the second lens unit are set appropriately.

A zoom lens includes first, second, and third lens units respectively having negative, positive, and negative refractive powers in this order from an object side to an image side. The lens units move during zooming such that the spacing between adjacent lens units changes, the second and third lens units are positioned on the object side at a telephoto end when compared to a wide angle end, and the third lens unit moves during focusing. A lateral magnification of the second lens unit at the wide angle end, a lateral magnification of the second lens unit at the telephoto end, a lateral magnification of the third lens unit at the wide angle end, a lateral magnification of the third lens unit at the telephoto end, a focal length of the first lens unit, and a focal length of the second lens unit are appropriately set.

A zoom lens includes, in order from an object side to an image side, a first lens unit having negative refractive power, a second lens unit having positive refractive power, a third lens unit having negative refractive power, and a fourth lens unit having positive refractive power, in which each lens unit moves during zooming from a wide-angle end to a telephoto end, and a focal length of the first lens unit, a focal length of the second lens unit, and a focal length of the entire zoom lens at the wide-angle end are appropriately set.

Zoom lens and image pickup apparatus equipped with the same

A zoom lens comprising, in order from an object side to an image side, a first lens unit having a negative refractive power, a second lens unit having a positive refractive power, and a third lens unit having a positive refractive power. The second and third lens units are configured to move in an optical axis direction for a magnification variation, and the first lens unit is configured to move in the optical axis direction to reduce an image-plane fluctuation associated with the magnification variation. Expressions &#x2212;0.83&#x2266;f/f&#x2266;&#x2212;0.40 and &#x2212;4.6&#x2266;f/fw&#x2266;&#x2212;2.5 T are satisfied where fis a focal length of the first lens unit, fis a focal length of the second lens unit, and fw is a focal length of the entire zoom lens at a wide angle end.

Zoom lens and image pickup apparatus

A zoom lens includes 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, and a fourth lens unit having a positive refractive power in order from an object side to an image side. The second and fourth lens units move during zooming, and the first and third lens units do not move for zooming. A focal length fw of the entire zoom lens at a wide-angle end, a focal length ft of the entire zoom lens at a telephoto end, a focal length fof the first lens unit, a focal length fof the second lens unit, and a focal length fof the fourth lens unit are appropriately set.

Growing community of inventors

Utsunomiya, Japan

Shinji Yamasaki