JP2014010399A5

JP2014010399A5 -

Info

Publication number: JP2014010399A5
Application number: JP2012148731A
Authority: JP
Filing date: 2012-07-02
Publication date: 2015-05-07
Anticipated expiration: 2032-07-02

Description

本発明の撮像装置は、複数の結像光学系と、前記複数の結像光学系が形成した光学像を光電変換する少なくとも一つの撮像素子とを有し、前記複数の結像光学系は、互いに異なる焦点距離を有する結像光学系を含み、各結像光学系は、フォーカシングの際に移動するフォーカスレンズユニットと、フォーカシングのためには移動しない固定レンズユニットを有し、各フォーカスレンズユニットは各結像光学系の最も物体側に配置されており、互いに異なる焦点距離を有する結像光学系のフォーカスレンズユニットに含まれるフォーカスレンズは互いに異なる面形状を有し、以下の条件式を満たすことを特徴とする。
０．８＜｜ｆｆｉ／ｆｆｈ｜＜１．２
｜（ΔＯｆ＋Δｆ）／ｆｔ｜＜２．１
ただし、
Δｆ＝ｆｆｉ−ｆｆｈ
ΔＯｆ＝Ｏｆｉ−Ｏｆｈ
ｆｔは前記複数の結像光学系の焦点距離のうち最も長い焦点距離、ｆｆｈは前記複数の結像光学系のうち任意の結像光学系ｈのフォーカスレンズユニットの焦点距離、ｆｆｉは前記複数の結像光学系のうち任意の結像光学系ｉのフォーカスレンズユニットの焦点距離、Ｏｆｈは前記結像光学系ｈのフォーカスレンズユニットの前側主点位置から像面までの距離、Ｏｆｉは前記結像光学系ｉのフォーカスレンズユニットの前側主点位置から像面までの距離である。 Imaging apparatus of the present invention includes an imaging optical system of multiple, and at least one of the image pickup element photoelectrically converting an optical science images the plurality of imaging optical system is formed, the plurality of imaging optical The system includes imaging optical systems having different focal lengths, and each imaging optical system has a focus lens unit that moves during focusing and a fixed lens unit that does not move for focusing. the lens unit is arranged on the most object side of the imaging optical system has a focus lens different surfaces shapes included in the focusing lens unit of an imaging optical system having different focal lengths from each other, the following conditional expression It is characterized by satisfying.
0.8 <| ffi / ffh | <1.2
| (ΔOf + Δf) / ft | <2.1
However,
Δf = ffi-ffh
ΔOf = Ofi-Ofh
ft longest focal length of the focal length of said plurality of imaging optical systems, ffh is the focal length of the focusing lens unit of any of the imaging optical system h of the plurality of imaging optical systems, ffi is the plurality Of the imaging optical system, the focal length of the focus lens unit of any imaging optical system i, Ofh is the distance from the front principal point position of the focus lens unit of the imaging optical system h to the image plane, and Ofi is the imaging image. This is the distance from the front principal point position of the focus lens unit of the optical system i to the image plane.

Claims

An imaging optical system number of multiple, and at least one of the image pickup element photoelectrically converting an optical science images the plurality of imaging optical system is formed,
The plurality of imaging optical systems includes imaging optical systems having different focal lengths;
Each imaging optical system has a focus lens unit that moves during focusing and a fixed lens unit that does not move for focusing , and each focusing lens unit is arranged on the most object side of each imaging optical system. cage, having a focus lens different surfaces shapes included in the focus lens unit of an imaging optical system having different focal lengths from each other,
An imaging device that satisfies the following conditional expression:
0.8 <| ffi / ffh | <1.2
| (ΔOf + Δf) / ft | <2.1
However,
Δf = ffi-ffh
ΔOf = Ofi-Ofh
ft longest focal length of the focal length of said plurality of imaging optical systems, ffh is the focal length of the focusing lens unit of any of the imaging optical system h of the plurality of imaging optical systems, ffi is the plurality Of the imaging optical system, the focal length of the focus lens unit of any imaging optical system i, Ofh is the distance from the front principal point position of the focus lens unit of the imaging optical system h to the image plane, and Ofi is the imaging image. This is the distance from the front principal point position of the focus lens unit of the optical system i to the image plane.

The imaging apparatus according to claim 1, wherein the plurality of imaging optical systems include imaging optical systems having equal focal lengths.

Wherein the plurality of imaging optical systems includes an imaging optical system wherein the focus lens unit is the focus lens unit and an imaging optical system having a negative refractive power has a positive refractive power,
Ofn the distance from the front principal point position to the image plane of off O over Kas lens unit that having a said negative refractive power, from the front principal point position of full O over Kas lens unit that having a said positive refractive power to the image plane The imaging apparatus according to claim 1, wherein the following conditional expression is satisfied when the distance is Ofp.
1.0 <Ofn / Ofp <2.4

It further has a holding part that holds a plurality of focus lens units together,
The imaging apparatus according to claim 1, wherein the following conditional expression is satisfied.
0.5 <| ffi / ft | <1.6

Wherein the plurality of focusing lens units, each of any one of claims 1 to 4 at least one focusing lens adjacent in a direction perpendicular to the optical axis is characterized by being composed of the same material The imaging device described.

Among the plurality of imaging optical systems, the focusing lens unit of the imaging optical system with the shortest focal length has a negative refractive power, and the focusing lens unit of the imaging optical system with the longest focal length has a positive refractive power. the imaging apparatus according to any one of claims 1 to 5, characterized in that it has a.

A plurality of imaging optical systems, a lens device detachably attached to the imaging apparatus main body, the image pickup apparatus main body converts photoelectrically Science image the plurality of imaging optical system is formed Having at least one image sensor;
The plurality of imaging optical systems includes imaging optical systems having different focal lengths;
Each imaging optical system has a focus lens unit that moves during focusing and a fixed lens unit that does not move for focusing , and each focusing lens unit is arranged on the most object side of each imaging optical system. cage, having a focus lens different surfaces shapes included in the focus lens unit of an imaging optical system having different focal lengths from each other,
A lens apparatus satisfying the following conditional expression:
0.8 <| ffi / ffh | <1.2
| (ΔOf + Δf) / ft | <2.1
However,
Δf = ffi-ffh
ΔOf = Ofi-Ofh
ft longest focal length of the focal length of said plurality of imaging optical systems, ffh is the focal length of the focusing lens unit of any of the imaging optical system h of the plurality of imaging optical systems, ffi is the plurality Of the imaging optical system, the focal length of the focus lens unit of any imaging optical system i, Ofh is the distance from the front principal point position of the focus lens unit of the imaging optical system h to the image plane, and Ofi is the imaging image. This is the distance from the front principal point position of the focus lens unit of the optical system i to the image plane.