JP2016170292A5

JP2016170292A5 -

Info

Publication number: JP2016170292A5
Application number: JP2015050374A
Authority: JP
Filing date: 2015-03-13
Publication date: 2018-04-19
Anticipated expiration: 2035-03-13

Description

本発明は、例えば、ピント位置の変動の補正に有利なズームレンズを提供することを目的とする。 For example, an object of the present invention is to provide a zoom lens that is advantageous in correcting a variation in focus position.

フォーカシングのために移動するフォーカスレンズ群と、前記フォーカスレンズ群より像側に配置され且つズーミングのために移動する２以上のレンズ群で構成される変倍レンズ群と、絞りと、ズーミングのためには移動しないリレーレンズ群とを有するズームレンズであって、前記変倍レンズ群又は前記リレーレンズ群は、１以上の要因に起因するピント位置の変動を補正するために移動する補正レンズ群を含み、前記補正レンズ群の最大移動量をＭｃとし、ピント位置の変動を補正するための前記補正レンズ群の最大移動量をＭｂとし、前記補正レンズ群が前記最大移動量Ｍｂだけ移動したときの結像位置の最大変化量をΔＳｋとし、前記変倍レンズ群に含まれる前記２以上のレンズ群の最大移動量をＭｍとして、
０.００１＜Ｍｃ／Ｍｍ＜０.３
０.３＜｜ΔＳｋ｜／Ｍｂ＜３.０
を満足することを特徴とする。 A focusing lens group which moves for full Okashingu and configured zooming lens group at least two lens groups moved for the disposed focus lens by Ri image side group and zooming, a stop, zooming a zoom lens having a relay lens group does not move for the zooming lens group or the relay lens group, the correction lens group that moves in order to correct fluctuation of focus position caused by one or more factors The maximum movement amount of the correction lens group is Mc , the maximum movement amount of the correction lens group for correcting the fluctuation of the focus position is Mb , and the correction lens group is moved by the maximum movement amount Mb. of the maximum change amount of the imaging position and DerutaSk, the maximum movement amount of the two or more lens groups included in the zoom lens unit as a Mm,
0.001 <Mc / Mm <0.3
0.3 <| ΔSk | / Mb <3.0
It is characterized by satisfying.

本発明によれば、例えば、ピント位置の変動の補正に有利なズームレンズを提供することができる。 According to the present invention, for example, it is possible to provide an advantageous zoom lens for correcting the variation of the focus position.

Claims

A focusing lens group which moves for full Okashingu and configured zooming lens group at least two lens groups moved for the disposed focus lens by Ri image side group and zooming, a stop, zooming a zoom lens having a relay lens group does not move for,
The zoom lens or said relay lens group includes a correction lens group that moves in order to correct fluctuation of focus position caused by one or more factors,
The maximum movement amount of the correction lens group is Mc , the maximum movement amount of the correction lens group for correcting the fluctuation of the focus position is Mb, and the image is formed when the correction lens group is moved by the maximum movement amount Mb. the maximum change amount of the position and DerutaSk, the maximum movement amount of the two or more lens groups included in the zoom lens unit as a Mm,
0.001 <Mc / Mm <0.300
0.3 <| ΔSk | / Mb <3.0
A zoom lens characterized by satisfying

And Fno an open F-number of the zoom lens, and the permissible circle of confusion [delta], the depth of focus is D,
D = Fno × δ
0.3 <Mb / D <300.0
The zoom lens according to claim 1, wherein:

Driving means for driving the correction lens group;
And control means for controlling the pre-Symbol driving means so as to correct the variation in the focal position due to the one or more factors,
The zoom lens according to claim 1, further comprising:

A storage means for storing correction information for correcting the variation of the focal position due to the one or more factors,
Wherein said control means includes a source of the one or more, based on the correction information stored in said storage means, for controlling said drive means,
The zoom lens according to claim 3.

It has a detection means for detecting the one or more factors,
Said control means, said one and more factors detected by the detecting means, based on the correction information stored in said storage means, for controlling said drive means,
The zoom lens according to claim 4.

The zoom lens according to claim 3, wherein the one or more factors include attachment / detachment of an extender lens group in the relay lens group.

The correcting lens group, a zoom lens according to any one of claims 1 to 6, wherein Tei Rukoto disposed in the relay lens group.

The correcting lens group, a zoom lens according to any one of claims 1 to 6, wherein Tei Rukoto disposed in said zooming lens group.

The correcting lens group, a zoom lens according to any one of claims 1 to 8, characterized in that it is constituted by one or more 3 or less lenses.

A zoom lens according to any one of claims 1 to 9,
An image sensor for receiving light from the zoom lens ;
An imaging device comprising: