JP6833446B2 - Converter device and imaging device with it - Google Patents
Converter device and imaging device with it Download PDFInfo
- Publication number
- JP6833446B2 JP6833446B2 JP2016207607A JP2016207607A JP6833446B2 JP 6833446 B2 JP6833446 B2 JP 6833446B2 JP 2016207607 A JP2016207607 A JP 2016207607A JP 2016207607 A JP2016207607 A JP 2016207607A JP 6833446 B2 JP6833446 B2 JP 6833446B2
- Authority
- JP
- Japan
- Prior art keywords
- imaging
- converter device
- optical system
- lens
- reimaging
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Description
本発明は、レンズ装置の後方（像側）に着脱可能に装着し、全系の撮像画角（焦点距離）を変化するコンバータ装置に関し、例えば銀塩フィルムカメラ、デジタルスチルカメラ、ビデオカメラ等の撮像装置に好適なものである。 The present invention relates to a converter device that is detachably attached to the rear (image side) of a lens device and changes the imaging angle of view (focal length) of the entire system, such as a silver halide film camera, a digital still camera, and a video camera. It is suitable for an image pickup device.
従来、撮像光学系のレンズ系中に装着して全系の撮像画角を変化させる光学系が知られている。特許文献１では撮像光学系の開口絞りと像面との間に倍率変換光学群を挿脱可能に設け、全系の焦点距離を変化させた光学系を開示している。またレンズ装置の像側に装着して、全系の焦点距離を変化するリアコンバータレンズが知られている（特許文献２、３）。特許文献２、３はマスターレンズ（レンズ装置）の像側に挿脱可能に装着して全系の焦点距離を拡大するリアコンバータレンズを開示している。 Conventionally, an optical system that is mounted in the lens system of an imaging optical system to change the imaging angle of view of the entire system is known. Patent Document 1 discloses an optical system in which a magnification conversion optical group is provided between the aperture diaphragm of the imaging optical system and the image plane so that the focal length of the entire system is changed. Further, a rear converter lens that is mounted on the image side of a lens device to change the focal length of the entire system is known (Patent Documents 2 and 3). Patent Documents 2 and 3 disclose a rear converter lens that is detachably attached to the image side of a master lens (lens device) to expand the focal length of the entire system.
レンズ装置の像側に挿脱するコンバータ装置は、瞬時の撮像画角の切り換えが容易である。しかしながらレンズ装置の像側にコンバータ装置を装着し、全系の撮像画角（全系の焦点距離）を瞬時に変化させることができ、しかも撮像画角の変化の前後の光学性能を良好に維持するには、コンバータ装置の構成を適切に設定することが重要になってくる。 The converter device that is inserted and removed from the image side of the lens device makes it easy to switch the imaging angle of view instantly. However, by mounting a converter device on the image side of the lens device, the imaging angle of view of the entire system (focal length of the entire system) can be changed instantly, and the optical performance before and after the change in the imaging angle of view is maintained well. Therefore, it is important to properly set the configuration of the converter device.
特許文献１では、瞬時に撮像画角の切り換えが容易な内蔵コンバータ装置付の光学系を開示しているが、レンズ装置に予めコンバータ装置を挿入する空間を設けておく必要があり、レンズ装置のレンズ全長が長くなる傾向がある。そのため、コンバータ装置が不要な場合でも、レンズ装置は大型化し、携帯し易さを考えたときには、必ずしも好ましくない。一方で、特許文献２、３の外付けのリアコンバータレンズは、リアコンバータレンズが不要な時は、レンズ装置から外しておけば良いため、レンズ装置自体が大型化することはない。しかしながら、瞬時な撮像画角の切り換えが困難であった。 Patent Document 1 discloses an optical system with a built-in converter device that makes it easy to switch the imaging angle of view instantly. However, it is necessary to provide a space for inserting the converter device in advance in the lens device, and the lens device has a space for inserting the converter device. The total length of the lens tends to be long. Therefore, even if the converter device is unnecessary, the lens device becomes large and is not always preferable in consideration of portability. On the other hand, the external rear converter lenses of Patent Documents 2 and 3 can be removed from the lens device when the rear converter lens is not needed, so that the lens device itself does not become large. However, it has been difficult to switch the imaging angle of view instantaneously.
本発明は、撮像画角の変化を瞬時に、しかも撮像画角の変化の前後においても良好な光学性能が容易に得られるコンバータ装置及びそれを有する撮像装置の提供を目的とする。 An object of the present invention is to provide a converter device capable of instantly changing an imaging angle of view and easily obtaining good optical performance before and after a change in an imaging angle of view, and an imaging device having the same.
本発明のコンバータ装置は、レンズ装置により所定面に形成される像を撮像面に再結像する再結像光学系を備え、
前記再結像光学系は、第１及び第２の再結像系と、該第１及び第２の再結像系よりも物体側及び像側の夫々に配置された光学系を有し、
前記第１の再結像系が前記コンバータ装置の光路上に配置された第１の撮像状態においては、前記第２の再結像系は前記コンバータ装置の光路外に退避され、前記第２の再結像系が前記コンバータ装置の光路上に配置された第２の撮像状態においては、前記第１の再結像系は前記コンバータ装置の光路外に退避され、
前記第１及び第２の再結像系よりも物体側及び像側の夫々に配置された前記光学系は、前記第１及び第２の撮像状態の切り替えに際して不動であり、
前記第１及び第２の撮像状態における撮像画角は互いに異なっており、
前記第１の撮像状態におけるバックフォーカスをＳｋ１、前記第２の撮像状態におけるバックフォーカスをＳｋ２とするとき、
０．８＜Ｓｋ１／Ｓｋ２＜１．２
なる条件式を満足することを特徴としている。
Converter device of the present invention, Bei give a re-imaging optical system for re-imaging on the imaging surface of the image formed on the predetermined plane by the lens apparatus,
The re-imaging optical system has a first and a second re-imaging system, an optical system disposed people each of the object side and the image side of the first and second re-imaging system,
In the first imaging state in which the first reimaging system is arranged on the optical path of the converter device, the second reimaging system is retracted out of the optical path of the converter device, and the second reimaging system is retracted out of the optical path of the converter device. In the second imaging state in which the reimaging system is arranged on the optical path of the converter device, the first reimaging system is retracted out of the optical path of the converter device.
The optical systems arranged on the object side and the image side of the first and second reimaging systems are immobile when switching between the first and second imaging states.
The imaging angles of view in the first and second imaging states are different from each other.
When the back focus in the first imaging state is Sk1 and the back focus in the second imaging state is Sk2,
0.8 <Sk1 / Sk2 <1.2
It is characterized by satisfying the conditional expression.
本発明によれば、撮像画角の変化を瞬時に、しかも撮像画角の変化の前後においても良好な光学性能が容易に得られるコンバータ装置が得られる。 According to the present invention, it is possible to obtain a converter device capable of instantly changing the imaging angle of view and easily obtaining good optical performance before and after the change in the imaging angle of view.
以下に、本発明の好ましい実施の形態を添付の図面に基づいて説明する。本発明のコンバータ装置は、撮像光学系を含むレンズ装置により所定面に形成される像を撮像面（撮像素子）に再結像する再結像光学系を含む。再結像光学系は、少なくとも第１再結像系と第２再結像系を含み、第１再結像系がコンバータ装置の光路上に配置された第１の撮像状態においては、第２再結像系はコンバータ装置の光路外に退避される。 Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. The converter device of the present invention includes a reimaging optical system that reimages an image formed on a predetermined surface by a lens device including an imaging optical system on an imaging surface (imaging element). The reimaging optical system includes at least a first reimaging system and a second reimaging system, and in the first imaging state in which the first reimaging system is arranged on the optical path of the converter device, the second The reimaging system is retracted out of the optical path of the converter device.
第２再結像系がコンバータ装置の光路上に配置された第２の撮像状態においては、第１再結像系はコンバータ装置の光路外に退避される。第１の撮像状態の撮像画角と、第２の撮像状態の撮像画角は異なっている。 In the second imaging state in which the second reimaging system is arranged on the optical path of the converter device, the first reimaging system is retracted out of the optical path of the converter device. The imaging angle of view in the first imaging state and the imaging angle of view in the second imaging state are different.
図１は本発明のコンバータ装置の要部概略図である。図１はレンズ装置に装着する本発明の実施例１のコンバータ装置を示している。図１におけるコンバータ装置は、切り換え可能な３つの撮像状態を示す。レンズ装置の像側に装着したとき、３つの光学系のうちの１つの光学系がレンズ装置に含まれる撮像光学系の光軸ＯＡ上に位置するように切り替わる。図２は本発明のコンバータ装置を装着する例として示すレンズ装置に含まれる撮像光学系ＭＬのレンズ断面図である。図３は図２の撮像光学系ＭＬの無限遠に合焦時の縦収差図である。 FIG. 1 is a schematic view of a main part of the converter device of the present invention. FIG. 1 shows a converter device according to a first embodiment of the present invention, which is mounted on a lens device. The converter device in FIG. 1 shows three switchable imaging states. When mounted on the image side of the lens device, the optical system of one of the three optical systems is switched so as to be located on the optical axis OA of the imaging optical system included in the lens device. FIG. 2 is a cross-sectional view of a lens of an imaging optical system ML included in a lens device shown as an example of mounting the converter device of the present invention. FIG. 3 is a longitudinal aberration diagram when the image pickup optical system ML of FIG. 2 is in focus at infinity.
図４（Ａ）、（Ｂ）、（Ｃ）は各々本発明における実施例１のコンバータ装置をレンズ装置の撮像光学系ＭＬの像側に装着した際の、第１の撮像状態、第２の撮像状態、第３の撮像状態のレンズ断面図である。図５（Ａ）、（Ｂ）、（Ｃ）は各々本発明における実施例１のコンバータ装置をレンズ装置の撮像光学系ＭＬの像側に装着した際の、第１の撮像状態、第２の撮像状態、第３の撮像状態の縦収差図である。 4 (A), (B), and (C) show the first image pickup state and the second image pickup state when the converter device of the first embodiment of the present invention is attached to the image side of the image pickup optical system ML of the lens device, respectively. It is a cross-sectional view of the lens of the image pickup state and the third image pickup state. 5 (A), (B), and (C) show the first image pickup state and the second image pickup state when the converter device of the first embodiment of the present invention is attached to the image side of the image pickup optical system ML of the lens device, respectively. It is a longitudinal aberration diagram of the image pickup state and the third image pickup state.
図６（Ａ）、（Ｂ）、（Ｃ）は各々本発明における実施例２のコンバータ装置をレンズ装置の撮像光学系ＭＬの像側に装着した際の、第１の撮像状態、第２の撮像状態、第３の撮像状態のレンズ断面図である。図７（Ａ）、（Ｂ）、（Ｃ）は各々本発明における実施例２のコンバータ装置をレンズ装置の撮像光学系ＭＬの像側に装着した際の、第１の撮像状態、第２の撮像状態、第３の撮像状態の縦収差図である。 6 (A), (B), and (C) show the first image pickup state and the second image pickup state when the converter device of the second embodiment of the present invention is attached to the image side of the image pickup optical system ML of the lens device, respectively. It is a cross-sectional view of the lens of the image pickup state and the third image pickup state. 7 (A), (B), and (C) show the first image pickup state and the second image pickup state when the converter device of the second embodiment of the present invention is attached to the image side of the image pickup optical system ML of the lens device, respectively. It is a longitudinal aberration diagram of the image pickup state and the third image pickup state.
球面収差図において実線のｄはｄ線（波長５８７．６ｎｍ）、二点鎖線のｇはｇ線（波長４３５．８ｎｍ）である。非点収差図において点線のＭはｄ線のメリディオナル像面、実線のＳはｄ線のサジタル像面である。歪曲はｄ線について示している。倍率色収差はｇ線によって表している。ωは半画角（度）、ＦｎｏはＦナンバーである。 In the spherical aberration diagram, the solid line d is the d line (wavelength 587.6 nm), and the alternate long and short dash line g is the g line (wavelength 435.8 nm). In the astigmatism diagram, the dotted line M is the meridional image plane of the d line, and the solid line S is the sagittal image plane of the d line. The distortion is shown for the d line. Chromatic aberration of magnification is represented by the g-line. ω is a half angle of view (degrees), and Fno is an F number.
各実施例において、３つの撮像状態の最大倍率と最小倍率の比が２．０となっており、十分な画角変更効果を得ると共に、全ての使用状態で高性能化している。また、３つの撮像状態で物体側の３枚で構成される正の屈折力の第１光学系Ｌ１と、像側の第３光学系Ｌ３を共通化している。第３光学系Ｌ３は１枚の負レンズからなる。又は第３光学系は１枚の正レンズと１枚の負レンズから成る。第１光学系Ｌ１と第３光学系Ｌ３の間の再結像系Ｌ２Ａ（Ｌ２Ｂ）、（Ｌ２Ｃ）のみを切替え可能としている。 In each embodiment, the ratio of the maximum magnification to the minimum magnification of the three imaging states is 2.0, a sufficient angle of view changing effect is obtained, and the performance is improved in all the usage states. Further, the first optical system L1 having a positive refractive power composed of three images on the object side in the three imaging states and the third optical system L3 on the image side are shared. The third optical system L3 is composed of one negative lens. Alternatively, the third optical system consists of one positive lens and one negative lens. Only the reimaging systems L2A (L2B) and (L2C) between the first optical system L1 and the third optical system L3 can be switched.
それにより、カメラ装置側とレンズ装置側それぞれとのジョイント部を避けて、効率的に切替え構造を構成している。尚、第１光学系Ｌ１と第３光学系Ｌ３を共通化しないで全ての光学系を切り換えても良い。 As a result, the switching structure is efficiently configured by avoiding the joints between the camera device side and the lens device side. It should be noted that all the optical systems may be switched without sharing the first optical system L1 and the third optical system L3.
レンズ断面図において、ＭＬはレンズ装置が有する撮像光学系である。ＣＬはコンバータ装置が有する再結像光学系である。撮像光学系ＭＬの像側にコンバータ装置の再結像光学系ＣＬを装着して、結像画角（撮像倍率）を種々と変える構成について説明する。例として、再結像光学系ＣＬが第１の撮像状態、第２の撮像状態、第３の撮像状態の３つの撮像状態を有し、そのうちの１つの撮像状態に切り換えて結像画角を変える構成について説明する。尚、撮像状態はいくつあっても良い。 In the lens sectional view, ML is an imaging optical system included in the lens device. CL is a reimaging optical system included in the converter device. A configuration in which the reimaging optical system CL of the converter device is mounted on the image side of the imaging optical system ML to change the imaging angle of view (imaging magnification) in various ways will be described. As an example, the reimaging optical system CL has three imaging states of a first imaging state, a second imaging state, and a third imaging state, and the imaging angle of view is changed by switching to one of the imaging states. The configuration to be changed will be described. There may be any number of imaging states.
図１において１はコンバータ装置本体である。Ｌ１は３つの撮像状態において、共通で使用する、不動の第１光学系である。Ｌ３は、３つの撮像状態において、共通で使用する、不動の第３光学系である。Ｌ２Ａ、Ｌ２Ｂ、Ｌ２Ｃは各々切り換え可能な第１再結像系（第１の再結像系）、第２再結像系（第２の再結像系）、第３再結像系（第３の再結像系）である。このうち１つの再結像系が第１光学系Ｌ１と第３光学系Ｌ３との間に切り換え可能に装着され１つの撮像状態を構成する。 In FIG. 1, reference numeral 1 denotes a converter device main body. L1 is an immovable first optical system that is commonly used in three imaging states. L3 is an immovable third optical system that is commonly used in three imaging states. L2A, L2B, and L2C are switchable first re-imaging system (first re-imaging system) , second re-imaging system (second re-imaging system) , and third re-imaging system (third). 3 re-imaging system) . Of these, one reimaging system is switchably mounted between the first optical system L1 and the third optical system L3 to form one imaging state.
第１再結像系Ｌ２Ａは第１光学系Ｌ１と第３光学系Ｌ３との間に挿着され結像倍率−１．０の第１の撮像状態ＯＬ１を構成する。第２再結像系Ｌ２Ｂは第１光学系Ｌ１と第３光学系Ｌ３との間に挿着され結像倍率−１．４の第２の撮像状態ＯＬ２を構成する。第３再結像系Ｌ２Ｃは第１光学系Ｌ１と第３光学系Ｌ３との間に挿着され結像倍率−２．０の第３の撮像状態ＯＬ３を構成する。 The first reimaging system L2A is inserted between the first optical system L1 and the third optical system L3 to form a first imaging state OL1 having an imaging magnification of −1.0. The second reimaging system L2B is inserted between the first optical system L1 and the third optical system L3 to form a second imaging state OL2 having an imaging magnification of −1.4. The third reimaging system L2C is inserted between the first optical system L1 and the third optical system L3 to form a third imaging state OL3 having an imaging magnification of −2.0.
７はレンズ装置（不図示）とのジョイント部である。８はカメラ装置（不図示）とのジョイント部である。第１の撮像状態ＯＬ１、第２の撮像状態ＯＬ２、第３の撮像状態ＯＬ３のうちから１つの撮像状態を選択的に採用することにより、１つの再結像光学系を構成し、撮像画角を変更している。即ち、撮像光学系ＭＬを含めた全系（撮像系）の焦点距離を変更している。 Reference numeral 7 denotes a joint portion with a lens device (not shown). Reference numeral 8 denotes a joint portion with a camera device (not shown). By selectively adopting one imaging state from the first imaging state OL1, the second imaging state OL2, and the third imaging state OL3, one reimaging optical system is configured, and the imaging angle of view is formed. Is changing. That is, the focal lengths of the entire system (imaging system) including the imaging optical system ML are changed.
本発明ではコンバータ装置の光学系の切り替えにより瞬時に画角変更（撮像倍率の変化）を達成するとともに、ズームレンズと同様に画角を変更した時に、実質的にピント位置が変わらないようにしている。 In the present invention, the angle of view can be changed (change in imaging magnification) instantly by switching the optical system of the converter device, and the focus position does not substantially change when the angle of view is changed in the same manner as the zoom lens. There is.
具体的には、第１の撮像状態ＯＬ１のバックフォーカスをＳｋ１、第２の撮像状態ＯＬ２のバックフォーカスをＳｋ２とするとき、
０．８＜Ｓｋ１／Ｓｋ２＜１．２ ・・・（１）
なる条件式を満足する。条件式（１）の上限又は下限を逸脱すると、画角の切り替え時にピント位置がずれてしまい、再合焦行為が必要になり、瞬時に画角を変更して撮影したい場合、好ましくない。条件式（１）は、より好ましくは次の数値範囲を満たすと良い。
Specifically, when the back focus of the first imaging state OL1 is Sk1 and the back focus of the second imaging state OL2 is Sk2,
0.8 <Sk1 / Sk2 <1.2 ... (1)
Satisfies the conditional expression. If the upper limit or the lower limit of the conditional expression (1) is deviated, the focus position shifts when the angle of view is switched, refocusing is required, and it is not preferable when the angle of view is changed instantly for shooting. The conditional expression (1) more preferably satisfies the following numerical range.
０．９＜Ｓｋ１／Ｓｋ２＜１．１ ・・・（１ａ）
この条件式を満たすためには、複数の異なる撮像倍率の光学系を同じレンズ全長で達成することが必要になる。
0.9 <Sk1 / Sk2 <1.1 ... (1a)
In order to satisfy this conditional expression, it is necessary to achieve a plurality of optical systems having different imaging magnifications with the same overall lens length.
特許文献２に開示されているリアコンバータレンズは、マスターレンズ（主レンズ系）側に負の屈折力の強いレンズを配置し、軸上光束をアフォーカルに近くし、像側の正の屈折力のレンズで再度収束させている。この負の屈折力のレンズと正の屈折力のレンズの関係により、適切な撮像倍率を得ている。例えば、撮像倍率を大きくするには、負の屈折力を強くし、正の屈折力を弱くする。それによりコンバータレンズ全系の負の屈折力が強くなり、バックフォーカスが伸びる。このため、通常は撮像倍率が大きくなるほどコンバータレンズのレンズ全長は長くなる。 The rear converter lens disclosed in Patent Document 2 has a lens having a strong negative refractive power arranged on the master lens (main lens system) side, makes the axial light beam close to afocal, and has a positive refractive power on the image side. It is converged again with the lens of. An appropriate imaging magnification is obtained by the relationship between the lens having a negative refractive power and the lens having a positive refractive power. For example, in order to increase the imaging magnification, the negative refractive power is increased and the positive refractive power is weakened. As a result, the negative refractive power of the entire converter lens system becomes stronger, and the back focus is extended. Therefore, normally, the larger the imaging magnification, the longer the overall lens length of the converter lens.
レンズ全長を同等にするためには、正の屈折力を極力物体側に寄せる必要があり、コンバータレンズのレンズ全長が圧迫され、収差が増加する。そのため、通常のリアコンバータレンズで撮像倍率の切り換えを行い、全使用状態で高画質化を達成することは困難である。 In order to make the total lens length equal, it is necessary to bring the positive refractive power to the object side as much as possible, and the total lens length of the converter lens is compressed, which increases the aberration. Therefore, it is difficult to achieve high image quality in all usage states by switching the imaging magnification with a normal rear converter lens.
そこで本発明では、コンバータ装置に再結像光学系を用いている。再結像光学系は、一度結像した光束を正の屈折力のレンズでアフォーカルにし、正の屈折力のレンズで再結像させる、正、正の屈折力配置になる。撮像倍率を変える場合は、正、正の屈折力の屈折力配分を変えることで実現できる。このため、再結像光学系全系の屈折力自体はあまり変化しない。よって、バックフォーカスの長さも同等になり、レンズ全長を変えずに複数の撮像倍率の光学系が得やすくなる。 Therefore, in the present invention, a re-imaging optical system is used for the converter device. The reimaging optical system has a positive and positive refractive power arrangement in which the once imaged luminous flux is afocalized by a lens having a positive refractive power and reimaged by a lens having a positive refractive power. When changing the imaging magnification, it can be realized by changing the refractive power distribution of the positive and positive refractive powers. Therefore, the refractive power itself of the entire re-imaging optical system does not change much. Therefore, the length of the back focus becomes the same, and it becomes easy to obtain an optical system having a plurality of imaging magnifications without changing the total length of the lens.
具体的に本発明のコンバータ装置を実施する最良の形態としては、レンズ装置をカメラ装置に装着して撮影可能な撮像システムに対し、レンズ装置とカメラ装置の間にコンバータ装置を装着する。このとき、コンバータ装置は再結像光学系を構成し、かつ装着したままの状態で、再結像光学系の一部または全部が光路中より退避して別の光学系を挿入することで、複数の撮像倍率が異なる撮像状態へ変更している。そして前述の条件式（１）を満たしている。 Specifically, the best mode for implementing the converter device of the present invention is to mount the converter device between the lens device and the camera device in an imaging system capable of taking a picture by mounting the lens device on the camera device. At this time, the converter device constitutes the re-imaging optical system, and in the state of being attached, a part or all of the re-imaging optical system is retracted from the optical path and another optical system is inserted. Multiple imaging magnifications have been changed to different imaging states. Then, the above-mentioned conditional expression (1) is satisfied.
次に本発明を実施するにあたり、より好ましい条件について説明する。再結像系のそれぞれが光路ＯＡ上に配置されたときにおける再結像光学系ＣＬの撮像倍率をβｃとする。再結像系のそれぞれが光路ＯＡ上に配置されたときにおける再結像光学系ＣＬの結像倍率のうち最大値をβｍａｘ、最小値をβｍｉｎとする。再結像光学系ＣＬの最も物体側のレンズ面から所定面までの距離をＯｂｊｃ、再結像光学系ＣＬの最も物体側のレンズ面から撮像面までの距離をＴｄｃとする。ここでＯｂｊｃと距離Ｔｄｃの符号は第１光学系Ｌ１の物体側のレンズ面から像側へ測ったときを正とする。 Next, more preferable conditions for carrying out the present invention will be described. Let βc be the imaging magnification of the re-imaging optical system CL when each of the re-imaging systems is arranged on the optical path OA. When each of the re-imaging systems is arranged on the optical path OA, the maximum value and the minimum value of the imaging magnification of the re-imaging optical system CL are βmax and βmin. Let Objc be the distance from the lens surface on the most object side of the reimaging optical system CL to a predetermined surface, and Tdc be the distance from the lens surface on the most object side of the reimaging optical system CL to the imaging surface. Here, the signs of Objc and the distance Tdc are positive when measured from the lens surface on the object side of the first optical system L1 to the image side.
このとき、次の条件式のうち１つ以上を満足するのが良い。
−５．００＜βｃ＜−０．５５ ・・・（２）
１．２＜βｍａｘ／βｍｉｎ＜５．０ ・・・（３）
−０．１５＜Ｏｂｊｃ／Ｔｄｃ＜０．６０ ・・・（４）
At this time, it is preferable to satisfy one or more of the following conditional expressions.
-5.00 <βc <-0.55 ... (2)
1.2 <βmax / βmin <5.0 ... (3)
-0.15 <Objc / Tdc <0.60 ... (4)
次に前述の各条件式の技術的意味について説明する。同じ撮像光学系で、コンバータ装置の有無の双方で、レンズ装置を使用するとき、仮にコンバータ装置が強い縮小倍率を持っていると、全系の光学系を広画角側に拡大することを意味する。このため、カメラ装置の像高に合わせて必要最小限の像高で設計したレンズ装置内の交換レンズにおいては、画角が不足してケラレが発生したり、光学性能が劣化する恐れがある。 Next, the technical meaning of each of the above conditional expressions will be described. When using a lens device with or without a converter device in the same imaging optical system, if the converter device has a strong reduction magnification, it means that the entire optical system is enlarged to the wide angle of view side. To do. Therefore, in the interchangeable lens in the lens device designed with the minimum necessary image height according to the image height of the camera device, the angle of view may be insufficient, eclipse may occur, and the optical performance may be deteriorated.
それを避けるためには、コンバータ装置の装着時のために、レンズ装置内の交換レンズの像高を予め大きく確保する必要がある。そうすると、レンズ装置が大型化してしまう。よって、再結像光学系をコンバータ装置の光学系として用いる場合、等倍近傍から拡大側に撮像倍率を持つことで、レンズ装置を大型化することなく、同じ撮像装置に対し、異なる機能を付加することができる。 In order to avoid this, it is necessary to secure a large image height of the interchangeable lens in the lens device in advance for mounting the converter device. Then, the lens device becomes large. Therefore, when the reimaging optical system is used as the optical system of the converter device, different functions can be added to the same image pickup device without increasing the size of the lens device by having the image pickup magnification from the vicinity of the same magnification to the magnification side. can do.
この時、条件式（２）において撮像倍率がマイナスになるのは、再結像光学系ＣＬで、像が反転するためである。条件式（２）の上限値を逸脱すると、縮小倍率が強くなるため、レンズ装置内の交換レンズの像高を余分に確保する必要があり、レンズ装置が大型化するため好ましくない。条件式（２）の下限値を逸脱すると、再結像光学系ＣＬの正の屈折力が強くなり過ぎ、軸上色収差が増大し、この収差の補正が困難になる。条件式（２）は、より好ましくは次の数値範囲を満たすと良い。
−３．００＜βｃ＜−０．７５ ・・・（２ａ）
At this time, the reason why the imaging magnification becomes negative in the conditional expression (2) is that the image is inverted in the re-imaging optical system CL. If the value deviates from the upper limit of the conditional expression (2), the reduction magnification becomes stronger, so that it is necessary to secure an extra image height of the interchangeable lens in the lens device, which is not preferable because the lens device becomes large. If the value deviates from the lower limit of the conditional expression (2), the positive refractive power of the reimaging optical system CL becomes too strong, the axial chromatic aberration increases, and it becomes difficult to correct this aberration. The conditional expression (2) more preferably satisfies the following numerical range.
−3.00 <βc <−0.75 ・ ・ ・ (2a)
条件式（３）は、撮像倍率（画角）の切り替え式のコンバータ装置で変更容易な撮像倍率の範囲を最適にするためのものである。条件式（３）の上限値を逸脱すると、撮像倍率が大きい方の光学系のレンズ装置側の正の屈折力が強くなり過ぎ、高画質化が困難になる。条件式（３）の下限値を逸脱すると、撮像倍率の切り換え効果が小さくなるため、好ましくない。条件式（３）は、より好ましくは、次の数値範囲を満たすと良い。
１．３＜βｍａｘ／βｍｉｎ＜３．０ ・・・（３ａ）
The conditional expression (3) is for optimizing the range of the imaging magnification that can be easily changed by the converter device that can switch the imaging magnification (angle of view). If the value deviates from the upper limit of the conditional expression (3), the positive refractive power on the lens device side of the optical system having the larger imaging magnification becomes too strong, and it becomes difficult to improve the image quality. If the value deviates from the lower limit of the conditional expression (3), the effect of switching the imaging magnification becomes small, which is not preferable. The conditional expression (3) more preferably satisfies the following numerical range.
1.3 <βmax / βmin <3.0 ... (3a)
条件式（４）は、本発明のコンバータ装置の装着時の全系のレンズ全長を短くするためのものである。 Conditional expression (4) is for shortening the total lens length of the entire system when the converter device of the present invention is mounted.
本発明のコンバータ装置に用いている再結像光学系ＣＬは、レンズ装置による像が形成される１次結像面が必ずしもコンバータ装置の最前面（第１レンズ面）よりも、レンズ装置側でなくても良い。レンズ装置との物理的な干渉さえ回避すれば、コンバータ装置の最前面基準で１次結像面をなるべく像側に近付ける程、レンズ装置とコンバータ装置との間隔を狭められ、全系を短縮できるため、好ましい。 In the re-imaging optical system CL used in the converter device of the present invention, the primary imaging surface on which the image formed by the lens device is formed is not necessarily on the front surface (first lens surface) of the converter device on the lens device side. It does not have to be. As long as physical interference with the lens device is avoided, the distance between the lens device and the converter device can be narrowed and the entire system can be shortened as the primary image plane is as close to the image side as possible with respect to the frontmost reference of the converter device. Therefore, it is preferable.
条件式（４）の上限値を逸脱すると、１次結像面がコンバータ装置の最前面に対し、像側に離れ過ぎて、レンズ装置とコンバータ装置が干渉する傾向となる。条件式（４）の下限値を逸脱すると、コンバータ装置とレンズ装置の間隔が空き過ぎて、全系が大型化するため好ましくない。条件式（４）は、より好ましくは条件式（４ａ）を満たすと良い。 If the upper limit of the conditional expression (4) is deviated, the primary image plane is too far from the front surface of the converter device to the image side, and the lens device and the converter device tend to interfere with each other. If the value deviates from the lower limit of the conditional expression (4), the distance between the converter device and the lens device becomes too large, and the entire system becomes large, which is not preferable. The conditional expression (4) more preferably satisfies the conditional expression (4a).
−０．１０＜Ｏｂｊｃ／Ｔｄｃ＜０.４８ ・・・（４ａ）
第１の撮像状態ＯＬ１は物体側から像側へ順に配置された、正の屈折力の第１光学系Ｌ１、正の屈折力の第１再結像系Ｌ２Ａ、第３光学系Ｌ３より構成されている。第２の撮像状態ＯＬ２は物体側から像側へ順に配置された、第１光学系Ｌ１、正の屈折力の第２再結像系Ｌ２Ｂ、第３光学系Ｌ３より構成されている。第１の撮像状態ＯＬ１と第２の撮像状態ＯＬ２はレンズ装置の光軸上に切り換えて配置される。各実施例において、撮像状態は２つ以上、いくつあっても良い。
-0.10 <Objc / Tdc <0.48 ... (4a)
The first imaging state OL1 is composed of a first optical system L1 having a positive refractive power, a first reimaging system L2A having a positive refractive power, and a third optical system L3 arranged in order from the object side to the image side. ing. The second imaging state OL2 is composed of a first optical system L1, a second reimaging system L2B having a positive refractive power, and a third optical system L3 arranged in order from the object side to the image side. The first imaging state OL1 and the second imaging state OL2 are switched and arranged on the optical axis of the lens device. In each embodiment, there may be two or more imaging states, and any number of imaging states may be present.
物体側と像側の光学系を固定とし、真ん中の光学系を交換可能とすることで、コンバータ装置のカメラ装置側及びレンズ装置側とのジョイント部の構造部材と、切替え機構との干渉を回避し易くしている。 By fixing the optical system on the object side and the image side and making the optical system in the middle interchangeable, interference between the structural member of the joint portion between the camera device side and the lens device side of the converter device and the switching mechanism is avoided. It is easy to do.
レンズ装置で形成される像に対して、レンズ装置にコンバータ装置を装着したときに形成される像は上下左右が反転している。レンズ装置とカメラ装置の間に、再結像光学系ＣＬを有するコンバータ装置が装着された時、レンズ装置とカメラ装置だけで撮影された時に対し、像の上下左右が反転される。そのため、カメラ装置は、コンバータ装置を検出した場合、センサーの各像高に到達した信号の上下左右を反転して表示させるのが良い。 The image formed when the converter device is attached to the lens device is vertically and horizontally inverted with respect to the image formed by the lens device. When a converter device having a re-imaging optical system CL is mounted between the lens device and the camera device, the image is inverted vertically and horizontally as compared with the case where the image is taken only by the lens device and the camera device. Therefore, when the camera device detects the converter device, it is preferable that the signal reaching each image height of the sensor is inverted and displayed vertically and horizontally.
本発明のコンバータ装置は、交換レンズ式のカメラシステムや、ビデオシステム等、種々適用できる。本発明の撮像装置は、撮像光学系を含むレンズ装置と、レンズ装置の像側に着脱可能に装着されたコンバータ装置と撮像素子を含むカメラ装置を備える。 The converter device of the present invention can be applied in various ways such as an interchangeable lens type camera system and a video system. The imaging device of the present invention includes a lens device including an imaging optical system, a converter device detachably attached to the image side of the lens device, and a camera device including an imaging element.
次にレンズ装置が有する撮像光学系及び実施例１、２に対応する数値データを示す。数値データ１、２については再結像光学系に係る第１の撮像状態、第２の撮像状態、第３の撮像状態のデータを示している。 Next, the imaging optical system of the lens device and the numerical data corresponding to Examples 1 and 2 are shown. The numerical data 1 and 2 show data of the first imaging state, the second imaging state, and the third imaging state related to the reimaging optical system.
後述する表１において距離Ｏｂｊｃは再結像光学系の第１レンズ面から撮像光学系の像面までの距離に相当している。距離Ｏｂｊの符号は１次結像面が第１レンズ面よりも物体側にあるときをマイナス、１次結像面が第１レンズ面よりも像側にあるときをプラスとしている。 In Table 1, which will be described later, the distance Objc corresponds to the distance from the first lens surface of the reimaging optical system to the image plane of the imaging optical system. The sign of the distance Obj is negative when the primary image plane is closer to the object side than the first lens surface, and positive when the primary image plane is closer to the image side than the first lens surface.
撮像光学系は焦点距離３９２．５７ｍｍの各収差が十分良好に補正された望遠レンズを使用している。よって、この撮像光学系に再結像光学系ＣＬをつけた状態で、各収差が良好に補正されていれば他のレンズ装置に装着した場合も、元の光学性能に対して良好な特性を得ることができる。 The imaging optical system uses a telephoto lens having a focal length of 392.57 mm in which each aberration is sufficiently corrected. Therefore, with the reimaging optical system CL attached to this imaging optical system, if each aberration is well corrected, even if it is attached to another lens device, it will have good characteristics with respect to the original optical performance. Obtainable.
各数値データにおいて、ｉは物体側から数えた順序を示す。ｒｉは第ｉ番目の光学面の曲率半径、ｄｉは第ｉ面と第（ｉ＋１）面との間も軸上間隔、ｎｄｉとνｄｉはそれぞれｄ線に対する第ｉ番目と第（ｉ＋１）面との間の媒質の屈折率、アッベ数を示す。また前述の各条件式と数値データにおける諸数値との関係を表１に示す。表１における各数値データにおけるパラメータと条件式の値は再結像系が光路上に配置されたときの値を示す。数値データにおけるＢＦ（バックフォーカス）はレンズ装置の撮像光学系の像側に再結像系を配置したときである。 In each numerical data, i indicates the order counted from the object side. ri is the radius of curvature of the i-th optical plane, di is the axial distance between the i-th plane and the (i + 1) plane, and ndi and νdi are the i-th and (i + 1) planes with respect to the d line, respectively. The refractive index and Abbe number of the medium in between are shown. Table 1 shows the relationship between each of the above conditional expressions and various numerical values in the numerical data. The values of the parameters and conditional expressions in each numerical data in Table 1 show the values when the reimaging system is arranged on the optical path. The BF (back focus) in the numerical data is when the reimaging system is arranged on the image side of the imaging optical system of the lens apparatus.
［撮像光学系］
単位 mm
面データ
面番号 r d nd νd 有効径
1 302.480 16.85 1.48749 70.2 135.37
2 -446.123 23.18 134.76
3 134.191 23.05 1.43387 95.1 118.67
4 -356.270 0.13 116.20
5 -347.207 4.30 1.65412 39.7 116.19
6 234.590 28.55 109.57
7 83.912 15.45 1.43387 95.1 95.35
8 395.372 1.00 93.14
9 65.333 6.00 1.48749 70.2 82.07
10 49.850 29.23 73.63
11 4411.151 6.72 1.80809 22.8 64.79
12 -142.290 2.60 1.80610 40.7 63.70
13 113.505 86.49 59.94
14(絞り) ∞ 2.06 41.40
15 133.234 8.35 1.77250 49.6 40.59
16 -65.519 2.05 1.80518 25.4 39.61
17 -327.098 4.00 38.50
18 85.457 4.30 1.84666 23.8 34.97
19 -137.387 1.71 1.72916 54.7 34.60
20 44.216 4.13 32.87
21 -195.875 1.63 1.83481 42.7 32.89
22 73.220 3.23 33.39
23 95.326 3.65 1.77250 49.6 35.35
24 -339.121 10.16 35.62
25 58.977 7.85 1.65412 39.7 38.99
26 -146.091 1.91 1.80809 22.8 38.55
27 122.690 9.66 38.08
28 ∞ 2.20 1.51633 64.1 38.45
29 ∞ 38.56
[Imaging optical system]
Unit mm
Surface data Surface number rd nd νd Effective diameter
1 302.480 16.85 1.48749 70.2 135.37
2 -446.123 23.18 134.76
3 134.191 23.05 1.43387 95.1 118.67
4-356.270 0.13 116.20
5 -347.207 4.30 1.65412 39.7 116.19
6 234.590 28.55 109.57
7 83.912 15.45 1.43387 95.1 95.35
8 395.372 1.00 93.14
9 65.333 6.00 1.48749 70.2 82.07
10 49.850 29.23 73.63
11 4411.151 6.72 1.80809 22.8 64.79
12 -142.290 2.60 1.80610 40.7 63.70
13 113.505 86.49 59.94
14 (Aperture) ∞ 2.06 41.40
15 133.234 8.35 1.77250 49.6 40.59
16 -65.519 2.05 1.80518 25.4 39.61
17 -327.098 4.00 38.50
18 85.457 4.30 1.84666 23.8 34.97
19 -137.387 1.71 1.72916 54.7 34.60
20 44.216 4.13 32.87
21 -195.875 1.63 1.83481 42.7 32.89
22 73.220 3.23 33.39
23 95.326 3.65 1.77250 49.6 35.35
24-339.121 10.16 35.62
25 58.977 7.85 1.65412 39.7 38.99
26 -146.091 1.91 1.80809 22.8 38.55
27 122.690 9.66 38.08
28 ∞ 2.20 1.51633 64.1 38.45
29 ∞ 38.56
焦点距離 392.57
Fナンバー 2.90
画角 3.15
像高 21.64
レンズ全長 371.15
BF 60.70
Focal length 392.57
F number 2.90
Angle of view 3.15
Image height 21.64
Lens overall length 371.15
BF 60.70
［数値データ１（第１の撮像状態）］
単位 mm
面データ
面番号 r d nd νd 有効径
1 104.337 10.13 1.84666 23.8 46.00
2 -50.000 2.30 1.48749 70.2 45.85
3 51.907 9.00 2.00069 25.5 41.41
4 -107.935 0.50 40.00
5 250.011 1.60 1.51633 64.1 34.06
6 21.533 16.05 27.31
7 -20.000 1.30 1.85478 24.8 19.32
8 24.867 10.62 1.59522 67.7 19.97
9 -29.351 0.94 21.78
10 42.396 5.15 1.76385 48.5 22.54
11 -39.469 0.15 22.43
12 22.444 4.12 1.76385 48.5 20.46
13 135.189 0.64 19.35
14 -163.548 1.00 1.61340 44.3 19.34
15 17.276 2.40 17.57
16(絞り) ∞ 6.22 17.57
17 -17.563 1.10 1.85478 24.8 17.24
18 35.119 5.78 1.76385 48.5 19.54
19 -23.854 0.15 20.85
20 70.486 4.94 1.89286 20.4 24.62
21 -43.717 12.12 25.24
22 -32.832 2.00 1.85478 24.8 25.79
23* -51.741 27.04
[Numerical data 1 (first imaging state)]
Unit mm
Surface data Surface number rd nd νd Effective diameter
1 104.337 10.13 1.84666 23.8 46.00
2 -50.000 2.30 1.48749 70.2 45.85
3 51.907 9.00 2.00069 25.5 41.41
4-107.935 0.50 40.00
5 250.011 1.60 1.51633 64.1 34.06
6 21.533 16.05 27.31
7 -20.000 1.30 1.85478 24.8 19.32
8 24.867 10.62 1.59522 67.7 19.97
9 -29.351 0.94 21.78
10 42.396 5.15 1.76385 48.5 22.54
11 -39.469 0.15 22.43
12 22.444 4.12 1.76385 48.5 20.46
13 135.189 0.64 19.35
14 -163.548 1.00 1.61340 44.3 19.34
15 17.276 2.40 17.57
16 (Aperture) ∞ 6.22 17.57
17 -17.563 1.10 1.85478 24.8 17.24
18 35.119 5.78 1.76385 48.5 19.54
19 -23.854 0.15 20.85
20 70.486 4.94 1.89286 20.4 24.62
21 -43.717 12.12 25.24
22 -32.832 2.00 1.85478 24.8 25.79
23 * -51.741 27.04
非球面データ
第23面
K = 0.00000e+000 A 4= 6.87954e-006 A 6=-4.05563e-009 A 8= 1.29206e-011 A10=-2.17860e-014
焦点距離 44.08
像高 21.64
レンズ全長 98.15
BF 38.58
Objc -8.35
βc -1.00
Aspherical data surface 23
K = 0.00000e + 000 A 4 = 6.87954e-006 A 6 = -4.05563e-009 A 8 = 1.29206e-011 A10 = -2.17860e-014
Focal length 44.08
Image height 21.64
Lens overall length 98.15
BF 38.58
Objc -8.35
βc -1.00
［数値データ１（第２の撮像状態）］
単位 mm
面データ
面番号 r d nd νd 有効径
1 104.337 10.13 1.84666 23.8 46.00
2 -50.000 2.30 1.48749 70.2 45.81
3 51.907 9.00 2.00069 25.5 41.04
4 -107.935 2.00 40.00
5 23.640 5.86 1.68893 31.1 24.00
6 12.340 10.07 17.38
7 -12.256 1.30 1.85478 24.8 15.17
8 27.607 5.97 1.59522 67.7 17.50
9 -18.624 0.15 18.80
10 55.092 5.09 1.76385 48.5 20.14
11 -24.691 0.15 20.22
12 28.466 3.99 1.76385 48.5 17.80
13 -63.300 0.25 16.82
14 -44.090 1.00 1.85478 24.8 16.82
15 22.582 3.66 15.83
16(絞り) ∞ 1.49 16.32
17 -32.411 1.10 1.68893 31.1 16.52
18 35.812 4.55 1.89286 20.4 18.48
19 -35.953 2.63 19.44
20 72.691 3.61 1.76385 48.5 22.11
21 -82.620 21.85 22.47
22 -32.832 2.00 1.85478 24.8 25.79
23* -51.741 27.04
[Numerical data 1 (second imaging state)]
Unit mm
Surface data Surface number rd nd νd Effective diameter
1 104.337 10.13 1.84666 23.8 46.00
2 -50.000 2.30 1.48749 70.2 45.81
3 51.907 9.00 2.00069 25.5 41.04
4-107.935 2.00 40.00
5 23.640 5.86 1.68893 31.1 24.00
6 12.340 10.07 17.38
7 -12.256 1.30 1.85478 24.8 15.17
8 27.607 5.97 1.59522 67.7 17.50
9 -18.624 0.15 18.80
10 55.092 5.09 1.76385 48.5 20.14
11 -24.691 0.15 20.22
12 28.466 3.99 1.76385 48.5 17.80
13 -63.300 0.25 16.82
14 -44.090 1.00 1.85478 24.8 16.82
15 22.582 3.66 15.83
16 (Aperture) ∞ 1.49 16.32
17 -32.411 1.10 1.68893 31.1 16.52
18 35.812 4.55 1.89286 20.4 18.48
19 -35.953 2.63 19.44
20 72.691 3.61 1.76385 48.5 22.11
21 -82.620 21.85 22.47
22 -32.832 2.00 1.85478 24.8 25.79
23 * -51.741 27.04
非球面データ
第23面
K = 0.00000e+000 A 4= 6.87954e-006 A 6=-4.05563e-009 A 8= 1.29206e-011 A10=-2.17860e-014
焦点距離 41.92
像高 21.64
レンズ全長 98.15
BF 38.50
Objc -8.35
βc -1.40
Aspherical data surface 23
K = 0.00000e + 000 A 4 = 6.87954e-006 A 6 = -4.05563e-009 A 8 = 1.29206e-011 A10 = -2.17860e-014
Focal length 41.92
Image height 21.64
Lens overall length 98.15
BF 38.50
Objc -8.35
βc -1.40
［数値データ１（第３の撮像状態）］
単位 mm
面データ
面番号 r d nd νd 有効径
1 104.337 10.13 1.84666 23.8 46.00
2 -50.000 2.30 1.48749 70.2 45.81
3 51.907 9.00 2.00069 25.5 41.04
4 -107.935 2.00 40.00
5 18.594 1.20 1.85478 24.8 16.27
6 12.897 7.48 14.89
7 -13.942 1.10 1.80518 25.4 13.63
8 17.185 5.53 1.59522 67.7 14.99
9 -18.539 0.15 15.96
10 31.869 2.85 1.76385 48.5 16.67
11 132.794 5.68 16.45
12 49.898 3.59 1.89286 20.4 16.19
13 -34.912 0.15 16.03
14 30.266 4.54 1.76385 48.5 15.13
15 -16.734 0.70 1.85478 24.8 14.21
16 25.289 0.86 13.02
17(絞り) ∞ 16.21 13.02
18 -11.711 0.70 1.61340 44.3 13.09
19 -496.197 0.15 15.18
20 2092.429 5.82 1.88300 40.8 15.50
21 -13.764 1.00 1.65160 58.5 17.29
22 -40.742 0.15 18.85
23 58.003 2.88 1.91082 35.3 20.05
24 -11627.862 11.96 20.28
25 -32.832 2.00 1.85478 24.8 25.75
26* -51.741 27.00
[Numerical data 1 (third imaging state)]
Unit mm
Surface data Surface number rd nd νd Effective diameter
1 104.337 10.13 1.84666 23.8 46.00
2 -50.000 2.30 1.48749 70.2 45.81
3 51.907 9.00 2.00069 25.5 41.04
4-107.935 2.00 40.00
5 18.594 1.20 1.85478 24.8 16.27
6 12.897 7.48 14.89
7 -13.942 1.10 1.80518 25.4 13.63
8 17.185 5.53 1.59522 67.7 14.99
9 -18.539 0.15 15.96
10 31.869 2.85 1.76385 48.5 16.67
11 132.794 5.68 16.45
12 49.898 3.59 1.89286 20.4 16.19
13 -34.912 0.15 16.03
14 30.266 4.54 1.76385 48.5 15.13
15 -16.734 0.70 1.85478 24.8 14.21
16 25.289 0.86 13.02
17 (Aperture) ∞ 16.21 13.02
18 -11.711 0.70 1.61340 44.3 13.09
19 -496.197 0.15 15.18
20 2092.429 5.82 1.88300 40.8 15.50
21 -13.764 1.00 1.65160 58.5 17.29
22 -40.742 0.15 18.85
23 58.003 2.88 1.91082 35.3 20.05
24 -11627.862 11.96 20.28
25 -32.832 2.00 1.85478 24.8 25.75
26 * -51.741 27.00
非球面データ
第26面
K = 0.00000e+000 A 4= 6.87954e-006 A 6=-4.05563e-009 A 8= 1.29206e-011 A10=-2.17860e-014
焦点距離 31.66
像高 21.64
レンズ全長 98.15
BF 38.50
Objc -8.35
βc -2.00
Aspherical data surface 26
K = 0.00000e + 000 A 4 = 6.87954e-006 A 6 = -4.05563e-009 A 8 = 1.29206e-011 A10 = -2.17860e-014
Focal length 31.66
Image height 21.64
Lens overall length 98.15
BF 38.50
Objc -8.35
βc -2.00
［数値データ２（第１の撮像状態）］
単位 mm
面データ
面番号 r d nd νd 有効径
1 ∞ 0.00 39.97
2 28.411 8.55 1.76385 48.5 40.59
3 76.700 0.15 38.69
4 30.000 10.25 1.89286 20.4 35.39
5 -67.629 1.50 1.85478 24.8 32.44
6 28.117 2.74 24.63
7 36.493 4.66 1.89286 20.4 22.19
8 -110.551 1.20 1.65412 39.7 19.57
9 11.674 16.38 14.88
10 -12.289 1.20 1.64769 33.8 15.95
11 37.882 6.83 1.59522 67.7 19.68
12 -20.912 0.15 22.01
13 -230.151 6.03 1.76385 48.5 25.51
14 -25.721 3.44 27.17
15 30.192 6.47 1.89286 20.4 30.24
16 1148.752 3.24 29.26
17 27.341 6.70 1.59522 67.7 24.63
18 -50.519 1.00 1.85478 24.8 22.50
19 39.435 1.94 20.25
20 -83.042 1.10 1.85478 24.8 20.25
21 13.408 6.57 1.59522 67.7 18.88
22 -245.006 0.15 18.93
23 21.124 6.13 1.76385 48.5 19.47
24 -37.533 0.15 19.28
25 -58.098 1.20 1.85478 24.8 18.91
26* 32.751 18.39
[Numerical data 2 (first imaging state)]
Unit mm
Surface data Surface number rd nd νd Effective diameter
1 ∞ 0.00 39.97
2 28.411 8.55 1.76385 48.5 40.59
3 76.700 0.15 38.69
4 30.000 10.25 1.89286 20.4 35.39
5 -67.629 1.50 1.85478 24.8 32.44
6 28.117 2.74 24.63
7 36.493 4.66 1.89286 20.4 22.19
8-110.551 1.20 1.65412 39.7 19.57
9 11.674 16.38 14.88
10 -12.289 1.20 1.64769 33.8 15.95
11 37.882 6.83 1.59522 67.7 19.68
12 -20.912 0.15 22.01
13 -230.151 6.03 1.76385 48.5 25.51
14 -25.721 3.44 27.17
15 30.192 6.47 1.89286 20.4 30.24
16 1148.752 3.24 29.26
17 27.341 6.70 1.59522 67.7 24.63
18 -50.519 1.00 1.85478 24.8 22.50
19 39.435 1.94 20.25
20 -83.042 1.10 1.85478 24.8 20.25
21 13.408 6.57 1.59522 67.7 18.88
22 -245.006 0.15 18.93
23 21.124 6.13 1.76385 48.5 19.47
24-37.533 0.15 19.28
25 -58.098 1.20 1.85478 24.8 18.91
26 * 32.751 18.39
非球面データ
第26面
K = 0.00000e+000 A 4= 4.50754e-005 A 6= 6.27700e-008 A 8=-2.08648e-010 A10= 2.25320e-012
焦点距離 66.90
像高 21.64
レンズ全長 97.72
BF 45.03
Objc 43.90
βc -1.00
Aspherical data surface 26
K = 0.00000e + 000 A 4 = 4.50754e-005 A 6 = 6.27700e-008 A 8 = -2.08648e-010 A10 = 2.25320e-012
Focal length 66.90
Image height 21.64
Lens overall length 97.72
BF 45.03
Objc 43.90
βc -1.00
［数値データ２（第２の撮像状態）］
単位 mm
面データ
面番号 r d nd νd 有効径
1 ∞ 0.00 39.97
2 28.411 8.55 1.76385 48.5 40.59
3 76.700 0.15 38.69
4 30.000 10.25 1.89286 20.4 35.39
5 -67.629 1.50 1.85478 24.8 32.44
6 28.117 3.00 24.63
7 51.632 3.37 1.89286 20.4 16.47
8 -19.921 1.00 1.72047 34.7 15.68
9 10.632 15.49 11.63
10 -28.311 1.00 1.65412 39.7 16.71
11 15.747 5.98 1.59522 67.7 19.49
12 -34.523 0.15 20.15
13 269.118 4.59 1.84666 23.8 21.25
14 -36.643 0.15 21.98
15 38.967 5.88 1.59522 67.7 22.21
16 -26.168 0.29 22.13
17 -29.684 1.00 1.85478 24.8 21.66
18 -282.266 9.32 21.83
19 50.645 4.14 1.89286 20.4 22.33
20 -84.313 0.30 21.93
21 34.719 2.12 1.95375 32.3 20.34
22 96.396 0.15 19.66
23 18.132 4.50 1.59522 67.7 17.57
24 -30.159 1.00 1.85478 24.8 16.37
25 13.041 2.85 13.30
26 -22.268 1.00 1.85478 24.8 13.29
27 55.757 2.00 1.59522 67.7 13.44
28 -46.715 0.50 13.69
29 21.124 6.13 1.76385 48.5 19.47
30 -37.533 0.15 19.28
31 -58.098 1.20 1.85478 24.8 18.91
32* 32.751 18.39
[Numerical data 2 (second imaging state)]
Unit mm
Surface data Surface number rd nd νd Effective diameter
1 ∞ 0.00 39.97
2 28.411 8.55 1.76385 48.5 40.59
3 76.700 0.15 38.69
4 30.000 10.25 1.89286 20.4 35.39
5 -67.629 1.50 1.85478 24.8 32.44
6 28.117 3.00 24.63
7 51.632 3.37 1.89286 20.4 16.47
8 -19.921 1.00 1.72047 34.7 15.68
9 10.632 15.49 11.63
10 -28.311 1.00 1.65412 39.7 16.71
11 15.747 5.98 1.59522 67.7 19.49
12 -34.523 0.15 20.15
13 269.118 4.59 1.84666 23.8 21.25
14 -36.643 0.15 21.98
15 38.967 5.88 1.59522 67.7 22.21
16 -26.168 0.29 22.13
17 -29.684 1.00 1.85478 24.8 21.66
18 -282.266 9.32 21.83
19 50.645 4.14 1.89286 20.4 22.33
20 -84.313 0.30 21.93
21 34.719 2.12 1.95375 32.3 20.34
22 96.396 0.15 19.66
23 18.132 4.50 1.59522 67.7 17.57
24 -30.159 1.00 1.85478 24.8 16.37
25 13.041 2.85 13.30
26 -22.268 1.00 1.85478 24.8 13.29
27 55.757 2.00 1.59522 67.7 13.44
28 -46.715 0.50 13.69
29 21.124 6.13 1.76385 48.5 19.47
30 -37.533 0.15 19.28
31 -58.098 1.20 1.85478 24.8 18.91
32 * 32.751 18.39
非球面データ
第32面
K = 0.00000e+000 A 4= 4.50754e-005 A 6= 6.27700e-008 A 8=-2.08648e-010 A10= 2.25320e-012
焦点距離 41.26
像高 21.64
レンズ全長 97.72
BF 45.03
Objc 43.90
βc -1.40
32nd surface of aspherical data
K = 0.00000e + 000 A 4 = 4.50754e-005 A 6 = 6.27700e-008 A 8 = -2.08648e-010 A10 = 2.25320e-012
Focal length 41.26
Image height 21.64
Lens overall length 97.72
BF 45.03
Objc 43.90
βc -1.40
［数値データ２（第３の撮像状態）］
単位 mm
面データ
面番号 r d nd νd 有効径
1 ∞ 0.00 23.90
2 28.411 8.55 1.76385 48.5 40.58
3 76.700 0.15 38.67
4 30.000 10.25 1.89286 20.4 35.48
5 -67.629 1.50 1.85478 24.8 32.54
6 28.117 3.00 24.77
7 1957.911 3.10 1.89286 20.4 11.83
8 -11.290 1.00 1.65412 39.7 11.20
9 9.272 4.76 8.78
10 36.729 8.00 1.85478 24.8 11.06
11 11.896 7.28 1.59522 67.7 12.77
12 -20.278 0.15 14.61
13 -214.125 6.42 1.89286 20.4 14.99
14 -51.606 0.15 16.03
15 35.044 4.25 1.59522 67.7 16.13
16 -20.378 3.87 15.89
17 -20.000 1.00 1.85478 24.8 12.43
18 25.476 2.99 12.91
19 38.416 4.65 1.89286 20.4 15.50
20 -26.607 1.95 16.07
21 21.914 4.08 1.59522 67.7 15.36
22 158.208 0.15 14.30
23 13.733 4.81 1.72000 50.2 13.36
24 -14.679 1.00 1.75520 27.5 11.97
25 8.440 2.88 9.63
26 -13.263 1.00 1.68893 31.1 9.66
27 19.805 2.86 1.76385 48.5 10.59
28 -48.106 0.50 11.34
29 21.124 6.13 1.76385 48.5 19.30
30 -37.533 0.15 19.14
31 -58.098 1.20 1.85478 24.8 18.80
32* 32.751 18.34
[Numerical data 2 (third imaging state)]
Unit mm
Surface data Surface number rd nd νd Effective diameter
1 ∞ 0.00 23.90
2 28.411 8.55 1.76385 48.5 40.58
3 76.700 0.15 38.67
4 30.000 10.25 1.89286 20.4 35.48
5 -67.629 1.50 1.85478 24.8 32.54
6 28.117 3.00 24.77
7 1957.911 3.10 1.89286 20.4 11.83
8 -11.290 1.00 1.65412 39.7 11.20
9 9.272 4.76 8.78
10 36.729 8.00 1.85478 24.8 11.06
11 11.896 7.28 1.59522 67.7 12.77
12 -20.278 0.15 14.61
13 -214.125 6.42 1.89286 20.4 14.99
14 -51.606 0.15 16.03
15 35.044 4.25 1.59522 67.7 16.13
16 -20.378 3.87 15.89
17 -20.000 1.00 1.85478 24.8 12.43
18 25.476 2.99 12.91
19 38.416 4.65 1.89286 20.4 15.50
20 -26.607 1.95 16.07
21 21.914 4.08 1.59522 67.7 15.36
22 158.208 0.15 14.30
23 13.733 4.81 1.72000 50.2 13.36
24 -14.679 1.00 1.75520 27.5 11.97
25 8.440 2.88 9.63
26 -13.263 1.00 1.68893 31.1 9.66
27 19.805 2.86 1.76385 48.5 10.59
28 -48.106 0.50 11.34
29 21.124 6.13 1.76385 48.5 19.30
30 -37.533 0.15 19.14
31 -58.098 1.20 1.85478 24.8 18.80
32 * 32.751 18.34
非球面データ
第32面
K = 0.00000e+000 A 4= 4.50754e-005 A 6= 6.27700e-008 A 8=-2.08648e-010 A10= 2.25320e-012
焦点距離 29.94
像高 21.64
レンズ全長 97.78
BF 45.02
Objc 43.90
βc -2.00
32nd surface of aspherical data
K = 0.00000e + 000 A 4 = 4.50754e-005 A 6 = 6.27700e-008 A 8 = -2.08648e-010 A10 = 2.25320e-012
Focal length 29.94
Image height 21.64
Lens overall length 97.78
BF 45.02
Objc 43.90
βc -2.00
１ コンバータ装置 ＭＬ 撮像光学系 ＣＬ 再結像光学系
Ｌ１ 第１光学系 Ｌ２Ａ 第１再結像系 Ｌ２Ｂ 第２再結像系
Ｌ２Ｃ 第３再結像系 Ｌ３ 第３光学系
1 Converter device ML Imaging optical system CL Re-imaging optical system L1 1st optical system L2A 1st re-imaging system L2B 2nd re-imaging system L2C 3rd re-imaging system L3 3rd optical system
Claims (10)
前記再結像光学系は、第１及び第２の再結像系と、該第１及び第２の再結像系よりも物体側及び像側の夫々に配置された光学系を有し、
前記第１の再結像系が前記コンバータ装置の光路上に配置された第１の撮像状態においては、前記第２の再結像系は前記コンバータ装置の光路外に退避され、前記第２の再結像系が前記コンバータ装置の光路上に配置された第２の撮像状態においては、前記第１の再結像系は前記コンバータ装置の光路外に退避され、
前記第１及び第２の再結像系よりも物体側及び像側の夫々に配置された前記光学系は、前記第１及び第２の撮像状態の切り替えに際して不動であり、
前記第１及び第２の撮像状態における撮像画角は互いに異なっており、
前記第１の撮像状態におけるバックフォーカスをＳｋ１、前記第２の撮像状態におけるバックフォーカスをＳｋ２とするとき、
０．８＜Ｓｋ１／Ｓｋ２＜１．２
なる条件式を満足することを特徴とするコンバータ装置。 A converter device including a reimaging optical system that reimages an image formed on a predetermined surface by a lens device on an imaging surface.
The re-imaging optical system has a first and a second re-imaging system, an optical system disposed people each of the object side and the image side of the first and second re-imaging system,
In the first imaging state in which the first reimaging system is arranged on the optical path of the converter device, the second reimaging system is retracted out of the optical path of the converter device, and the second reimaging system is retracted out of the optical path of the converter device. In the second imaging state in which the reimaging system is arranged on the optical path of the converter device, the first reimaging system is retracted out of the optical path of the converter device.
The optical systems arranged on the object side and the image side of the first and second reimaging systems are immobile when switching between the first and second imaging states.
The imaging angles of view in the first and second imaging states are different from each other.
When the back focus in the first imaging state is Sk1 and the back focus in the second imaging state is Sk2,
0.8 <Sk1 / Sk2 <1.2
A converter device characterized by satisfying the conditional expression.
−５．００＜βｃ＜−０．５５
なる条件式を満たすことを特徴とする請求項１に記載のコンバータ装置。 When the imaging magnification of the re-imaging optical system is βc, −5.00 <βc <−0.55 in each of the first and second imaging states.
The converter device according to claim 1, wherein the converter device satisfies the conditional expression.
１．２＜βｍａｘ／βｍｉｎ＜５．０
なる条件式を満たすことを特徴とする請求項１または２に記載のコンバータ装置。 When the maximum value is βmax and the minimum value is βmin among the imaging magnifications of the reimaging optical system in each of the first and second imaging states.
1.2 <βmax / βmin <5.0
The converter device according to claim 1 or 2, wherein the converter device satisfies the conditional expression.
−０．１５＜Ｏｂｊｃ／Ｔｄｃ＜０．６０
なる条件式を満たすことを特徴とする請求項１乃至３のいずれか１項に記載のコンバータ装置。 When the distance from the lens surface on the most object side of the reimaging optical system to the predetermined surface is Objc, and the distance from the lens surface on the most object side of the reimaging optical system to the imaging surface is Tdc.
-0.15 <Objc / Tdc <0.60
The converter device according to any one of claims 1 to 3, wherein the converter device satisfies the conditional expression.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2016207607A JP6833446B2 (en) | 2016-10-24 | 2016-10-24 | Converter device and imaging device with it |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2016207607A JP6833446B2 (en) | 2016-10-24 | 2016-10-24 | Converter device and imaging device with it |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| JP2018072366A JP2018072366A (en) | 2018-05-10 |
| JP2018072366A5 JP2018072366A5 (en) | 2019-11-28 |
| JP6833446B2 true JP6833446B2 (en) | 2021-02-24 |
Family
ID=62115179
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2016207607A Active JP6833446B2 (en) | 2016-10-24 | 2016-10-24 | Converter device and imaging device with it |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP6833446B2 (en) |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63205626A (en) * | 1987-02-20 | 1988-08-25 | Minolta Camera Co Ltd | Relay lens system |
| JP3370579B2 (en) * | 1997-11-11 | 2003-01-27 | ペンタックス株式会社 | Anti-vibration lens attachment |
| JP2002350722A (en) * | 2001-05-29 | 2002-12-04 | Tochigi Nikon Corp | Image re-formation optical system and converter furnished with the same |
| JP2004046022A (en) * | 2002-07-16 | 2004-02-12 | Nikon Corp | Relay optical system equipped with vibration-proofing function |
| JP2005189315A (en) * | 2003-12-24 | 2005-07-14 | Olympus Corp | Projection optical system and microscope adapter unit for connecting imaging apparatus using same |
| CN102388332A (en) * | 2009-04-10 | 2012-03-21 | 黑眼睛光学有限公司 | Variable power optical system |
| US9625695B2 (en) * | 2014-06-20 | 2017-04-18 | Agilent Technologies, Inc. | Magnifying assembly for an infrared microscope |
| DE102014112199A1 (en) * | 2014-08-26 | 2016-03-03 | Carl Zeiss Microscopy Gmbh | Microscopic imaging system |
-
2016
- 2016-10-24 JP JP2016207607A patent/JP6833446B2/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| JP2018072366A (en) | 2018-05-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR102385167B1 (en) | Zoom lens and image pickup apparatus including same | |
| WO2016021228A1 (en) | Image-forming optical system and optical device provided with same | |
| JP2009080176A (en) | Rear converter lens apparatus and photographing system including the same | |
| US10571670B2 (en) | Zoom lens and image pickup apparatus including the same | |
| JP2003241097A (en) | High variable power ratio zoom lens | |
| JP5217693B2 (en) | Lens system and optical device | |
| JP2005092056A (en) | Zoom lens and image pickup device having same | |
| JP2010276656A (en) | Zoom lens and imaging apparatus having the same | |
| JP2010072359A (en) | Lens system and optical device | |
| JP6287242B2 (en) | Amphibious zoom lens and imaging device | |
| JP2001066503A (en) | Zoom lens | |
| JP6830470B2 (en) | Imaging optics, projection display, and imaging equipment | |
| JP5858761B2 (en) | Zoom lens and imaging apparatus having the same | |
| JP2002287026A (en) | Rear conversion lens | |
| WO2016194110A1 (en) | Single-focus optical system and optical device provided with same | |
| JP5217694B2 (en) | Lens system and optical device | |
| JPH10161024A (en) | Zoom lens having camera shake correcting function | |
| WO2017168603A1 (en) | Single focus optical system and optical device equipped with same | |
| JP4630451B2 (en) | Zoom lens and optical apparatus using the same | |
| JP2009186570A (en) | Zoom lens and imaging apparatus having the same | |
| JP2002196238A (en) | Zoom lens and optical equipment using the same | |
| JP4817551B2 (en) | Zoom lens | |
| JP4537114B2 (en) | Zoom lens | |
| JP4838899B2 (en) | Zoom lens and optical apparatus using the same | |
| JP6716215B2 (en) | Imaging device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20191016 |
|
| A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20191016 |
|
| RD01 | Notification of change of attorney |
Free format text: JAPANESE INTERMEDIATE CODE: A7421 Effective date: 20191203 |
|
| A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20200716 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20200929 |
|
| A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20201126 |
|
| TRDD | Decision of grant or rejection written | ||
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20210105 |
|
| A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20210203 |
|
| R151 | Written notification of patent or utility model registration |
Ref document number: 6833446 Country of ref document: JP Free format text: JAPANESE INTERMEDIATE CODE: R151 |