JP2833188B2 - Imaging device - Google Patents
Imaging deviceInfo
- Publication number
- JP2833188B2 JP2833188B2 JP2259277A JP25927790A JP2833188B2 JP 2833188 B2 JP2833188 B2 JP 2833188B2 JP 2259277 A JP2259277 A JP 2259277A JP 25927790 A JP25927790 A JP 25927790A JP 2833188 B2 JP2833188 B2 JP 2833188B2
- Authority
- JP
- Japan
- Prior art keywords
- lens system
- optical axis
- imaging
- moved
- zoom
- 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.)
- Expired - Lifetime
Links
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/04—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
- G02B7/10—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification by relative axial movement of several lenses, e.g. of varifocal objective lens
- G02B7/102—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification by relative axial movement of several lenses, e.g. of varifocal objective lens controlled by a microcomputer
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
- H04N23/67—Focus control based on electronic image sensor signals
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
- H04N23/69—Control of means for changing angle of the field of view, e.g. optical zoom objectives or electronic zooming
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B15/00—Optical objectives with means for varying the magnification
- G02B15/14—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective
- G02B15/16—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group
- G02B15/163—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group having a first movable lens or lens group and a second movable lens or lens group, both in front of a fixed lens or lens group
- G02B15/167—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group having a first movable lens or lens group and a second movable lens or lens group, both in front of a fixed lens or lens group having an additional fixed front lens or group of lenses
- G02B15/173—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group having a first movable lens or lens group and a second movable lens or lens group, both in front of a fixed lens or lens group having an additional fixed front lens or group of lenses arranged +-+
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lens Barrels (AREA)
- Lenses (AREA)
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は撮像装置に関し、特にテレ化及びワイド化用
のコンバージョンレンズの取り付けを不要として、一層
のテレ化及びワイド化機能を向上させた撮像装置に関す
る。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image pickup apparatus, and more particularly, to an image pickup apparatus in which a telephoto and widening function is not required and a telephoto and widening function is further improved. Related to the device.
（従来の技術） 第５図は従来のズーム機能付のオートフォーカス機能
を有した撮像装置の概略ブロック図で、光学系は前玉系
１、ズーム系２、結像系３より構成されている。(Prior Art) FIG. 5 is a schematic block diagram of a conventional image pickup apparatus having an autofocus function with a zoom function. The optical system includes a front lens system 1, a zoom system 2, and an imaging system 3. .
被写体からの撮像光Ａは前記光学系より撮像素子（CC
D）４に入射され、この撮像素子４内の光電変換面で電
気信号に変換されてカメラ回路に供給される。The imaging light A from the subject is transmitted from the optical system to the imaging device (CC
D) The light is incident on 4 and is converted into an electric signal by a photoelectric conversion surface in the image pickup device 4 and supplied to a camera circuit.
一方、撮像素子４からの出力信号は、図示しないゲイ
ンコントローラ回路、バンドパスフィルタ等を介して検
波器に供給されて所定高域成分が取り出され、合焦され
た時、最大の焦点電圧が得られる。On the other hand, an output signal from the image sensor 4 is supplied to a detector via a gain controller circuit, a band-pass filter, and the like (not shown), and a predetermined high-frequency component is extracted. Can be
焦点電圧はAF回路５に供給され、ここで制御信号を生
成し、モータ６を駆動して結像系３を光軸上の合焦位置
に移動させる。The focus voltage is supplied to the AF circuit 5, where a control signal is generated, and the motor 6 is driven to move the imaging system 3 to a focus position on the optical axis.
更に、装置の機能以上のテレ化撮影を望む場合には、
テレ化用コンバージョンレンズ７を装着し、ワイド化撮
影を望む場合には、ワイド化用コンバージョンレンズ８
を装着する構成となっていた。Furthermore, if you want telephotography beyond the capabilities of the device,
If the telephoto conversion lens 7 is attached and wide-angle shooting is desired, the wide-angle conversion lens 8
Had to be attached.
（発明が解決しようとする課題） 従って、装置の機能以上のテレ化及びワイド化を望む
場合には、コンバージョンレンズを余分に着脱しなけれ
ばならず、装着に手間どったり、装着時の装置全体が大
きくなってしまったり、コンバージョンレンズそのもの
の持ち運びも不便となるものであった。(Problems to be Solved by the Invention) Therefore, if it is desired to increase the telephoto and widening beyond the function of the device, it is necessary to attach and detach an extra conversion lens, which is troublesome in mounting, and the entire device at the time of mounting is required. And the conversion lens itself became inconvenient to carry.
本発明は、より、一層のテレ化及びワイド化撮影を可
能とした装置でありながらも小型化を達成し得る撮像装
置を提供することを目的とする。SUMMARY OF THE INVENTION It is an object of the present invention to provide an image pickup apparatus capable of achieving downsizing even though it is an apparatus capable of further telephoto and wide-angle shooting.
（課題を解決するための手段） 上記の目的を達成するための手段として以下の（１）
〜（３）に記載した撮像装置を提供しようというもので
ある。(Means for solving the problem) As means for achieving the above object, the following (1)
It is intended to provide the imaging device described in (3).
すなわち、本発明の撮像装置は、 （１）光軸上に少なくとも第１のレンズ系と第２のレン
ズ系と第３のレンズ系とを順次配置してズーム系を構成
し、このズーム系から供給される撮像光を撮像素子に供
給して撮像信号を得るようにした撮像装置において、 前記第１のレンズ系と前記第２のレンズ系とを互いに
独立して移動可能にし、前記ズーム系の一部である前記
第１のレンズ系が光軸外に移動された際に、前記第２の
レンズ系を光軸上を移動させて変倍像を得るようにする
と共に、前記第３のレンズ系又は前記撮像素子の少なく
も一方をフォーカシングのための可動部として構成した
ことを特徴とする撮像装置。That is, the imaging apparatus of the present invention comprises: (1) a zoom system configured by sequentially arranging at least a first lens system, a second lens system, and a third lens system on the optical axis; An imaging apparatus configured to supply an imaging light to an imaging device to obtain an imaging signal, wherein the first lens system and the second lens system are movable independently of each other, When the first lens system, which is a part, is moved off the optical axis, the second lens system is moved on the optical axis to obtain a zoomed image and the third lens system An imaging apparatus, wherein at least one of the system and the imaging element is configured as a movable unit for focusing.
（２）請求項（１）記載の撮像装置において、前記第１
のレンズ系が光軸外に移動された際、第２のレンズ系が
光軸上のワイド端近傍に移動せられる構成であることを
特徴とする撮像装置。(2) The imaging device according to (1), wherein the first
An imaging apparatus characterized in that the second lens system is moved near the wide end on the optical axis when the lens system is moved off the optical axis.
（３）請求項（１）記載の撮像装置において、前記第１
のレンズ系が光軸外と光軸上とを移動する構成としたこ
とを特徴とする撮像装置。(3) The imaging device according to (1), wherein the first
An imaging apparatus characterized in that the lens system of (1) is configured to move outside the optical axis and on the optical axis.
（作 用） 第１のレンズ系を移動させてテレ化及びワイド化機能
を向上させる。(Operation) The first lens system is moved to improve the telephoto and widening functions.
（実 施 例） 第１図は本発明に係る撮像装置の一実施例を示す概略
ブロック系統図である。(Embodiment) FIG. 1 is a schematic block diagram showing an embodiment of an imaging apparatus according to the present invention.
以下、本実施例に従って具体的に説明する。 Hereinafter, the present embodiment will be specifically described.
同図中、光学系は凸レンズ系より成る前玉糸（第１の
レンズ系）30と、凹レンズ系31a,31bより成るズーム系
（第２のレンズ系）31と、凸レンズ32a,凹レンズ32b,凸
レンズ32c（第３のレンズ系）より成る結像系32とより
光軸上に順次構成される。In the figure, the optical system includes a front yarn (first lens system) 30 composed of a convex lens system, a zoom system (second lens system) 31 composed of concave lens systems 31a and 31b, a convex lens 32a, a concave lens 32b, and a convex lens 32c. An image forming system 32 composed of (third lens system) and the optical system are sequentially arranged on the optical axis.
被写体からの撮像光Ａは前記光学系を通じて光学ビー
トを除去するための水晶ローパスフィルタ33を介して撮
像素子34に結像され、この撮像素子34内で光電変換が行
われ、この出力信号は増幅器36を介してビデオ回路37に
供給され、ここで所定の信号処理が施されて映像信号に
準拠した信号にされる。An imaging light A from a subject is imaged on an imaging device 34 via a crystal low-pass filter 33 for removing an optical beat through the optical system, photoelectric conversion is performed in the imaging device 34, and the output signal is amplified by an amplifier. The video signal is supplied to a video circuit 37 via a, where the signal is subjected to a predetermined signal processing to be converted into a signal conforming to a video signal.
一方、増幅器36の出力はバンドパスフィルタ（BPF）3
8にも供給されて、ここで所定の高域成分が抽出され
る。On the other hand, the output of the amplifier 36 is a bandpass filter (BPF) 3
8, and a predetermined high-frequency component is extracted here.
この出力信号はゲインコントロールアンプ（GCA）39
に供給され、ここで焦点電圧が低くなる場合には電圧が
増幅され次段のエリアセンシング回路41に供給される。This output signal is a gain control amplifier (GCA) 39
When the focus voltage becomes low, the voltage is amplified and supplied to the area sensing circuit 41 in the next stage.
このエリアセンシング回路41で撮像エリア部が抜き出
されて検波され、次段のA/D（アナログ−デジタル）変
換器42に焦点電圧として出力される。The image sensing area is extracted and detected by the area sensing circuit 41, and is output to the next-stage A / D (analog-digital) converter 42 as a focal voltage.
このA/D変換器42で、デジタル化されて焦点電圧情報
が演算回路43に供給される。The A / D converter 42 supplies the focus voltage information to the arithmetic circuit 43 after digitization.
この演算回路43には同時に撮像素子34の位置を検出す
る位置センサ44の位置情報が供給さられると共に、他の
位置センサ45,46からもズームレンズ系31及び前玉系30
の焦点距離に関連した位置情報が供給されている。The arithmetic circuit 43 is simultaneously supplied with the position information of the position sensor 44 for detecting the position of the image sensor 34, and receives the zoom lens system 31 and the front lens system 30 from the other position sensors 45 and 46.
Is provided.
この演算回路43には、前記A/D変換器42から撮像素子3
4の光軸方向への移動に伴なう焦点電圧がフォーカシン
グ開始から１フィールド毎にサンプリングされ、順次デ
ジタル化されて供給されており、これら１フィールド毎
の焦点電圧を逐次レベル比較して差分電圧を算出し、こ
の差分電圧のレベルの大小及び符号変化を検出して前記
位置センサ44,45,46からの位置情報とにより合焦位置を
算出し、この結果をドライブ回路47を介してモータ48を
駆動することにより撮像素子34を光軸に沿って合焦位置
に移動させる。The arithmetic circuit 43 includes the image sensor 3 from the A / D converter 42.
The focus voltage associated with the movement in the direction of the optical axis 4 is sampled for each field from the start of focusing, and is sequentially digitized and supplied. Is calculated, the magnitude of the level of the differential voltage and the sign change are detected, and the in-focus position is calculated based on the position information from the position sensors 44, 45, and 46. Is driven to move the image sensor 34 to the in-focus position along the optical axis.
第２図はズーム系31の同一距離の被写体にピントを合
せた時の撮像素子（フォーカス系）の位置と焦点距離と
の一般的な関係を表わした図で、撮像素子34は有限距離
ではズームにつれて結像位置が変わることが示される。FIG. 2 is a diagram showing a general relationship between the position of the image sensor (focus system) and the focal length when focusing on an object at the same distance in the zoom system 31. It is shown that the imaging position changes as the position changes.
このズームによる結像位置の変化率は被写体距離によ
って変わり、近距離ほど変化率が大きく二次元曲線とな
る。The rate of change of the imaging position due to this zoom changes depending on the subject distance, and the closer the distance, the greater the rate of change becomes a two-dimensional curve.
従って、ズームを行う場合には、ズーム状態に応じて
撮像素子34を移動して結像位置を補正する必要が生じ
る。本実施例の装置においても、この二次元曲線に照ら
してズーム補正を行っている。Therefore, when performing zooming, it is necessary to move the image sensor 34 according to the zoom state to correct the image forming position. Also in the apparatus of the present embodiment, zoom correction is performed in light of the two-dimensional curve.
同図において例えば、今、焦点距離faで被写体距離2m
に焦点合わせをして撮像素子34の位置がXaの状態とす
る。In the figure, for example, the object distance is 2 m at the focal length fa.
And the position of the image sensor 34 is set to the state of Xa.
この状態時よりズームスイッチ49をテレ方向に操作す
ると、演算回路43は他の制御信号をドライブ回路50に供
給し、モータ51により凹レンズ系31a,31bを光軸方向に
焦点距離fa′の位置まで移動させる。When the zoom switch 49 is operated in the tele direction from this state, the arithmetic circuit 43 supplies another control signal to the drive circuit 50, and the motor 51 causes the concave lens systems 31a and 31b to move to the position of the focal length fa 'in the optical axis direction. Move.
同時に演算回路43には位置センサ44,46から撮像素子3
4及び前玉系30の位置情報が供給されており、これらよ
り被写体距離が算出され、予め同図の関係曲線より求め
られた撮像素子34の補正位置を演算回路43内のテーブル
から読み取り、この結果に基づいて制御信号をドライブ
回路47に供給して撮像素子34を合焦位置Xa′に移動させ
る構成としている。At the same time, the arithmetic circuit 43 supplies the image sensor 3 from the position sensors 44 and 46.
4 and the position information of the front lens system 30 are supplied, the subject distance is calculated from them, and the correction position of the imaging device 34 previously obtained from the relationship curve of FIG. Based on the result, a control signal is supplied to the drive circuit 47 to move the image sensor 34 to the focus position Xa '.
尚、この実施例では合焦時に撮像素子34を移動させる
構成としているが、例えば結像系32の凸レンズ系32cを
移動させる構成としてもよい。In this embodiment, the image pickup device 34 is moved at the time of focusing. However, for example, the convex lens system 32c of the imaging system 32 may be moved.
その場合には、レンズ系32cの位置センサを備えるこ
とになる。In that case, a position sensor for the lens system 32c is provided.
前玉系30は光軸上のP1,P2,P3の三点位置を所望により
摺動される構成とされ、通常時はP1の位置に置かれてい
る。The front lens system 30 is configured to slide as required at three points P 1 , P 2 , and P 3 on the optical axis, and is normally located at the position P 1 .
例えば、更にテレ化撮像を望む場合にはスイッチ52を
ONすると、この信号が演算回路34に供給される。For example, if further telephoto imaging is desired, switch 52 should be set.
When turned on, this signal is supplied to the arithmetic circuit.
演算回路43では、この信号に基づき駆動信号をドライ
ブ回路53に供給し、モータ54により前玉系30をP1位置よ
り光軸上のP2位置にすばやく直進摺動させる。In the arithmetic circuit 43, the signal a drive signal based on the supplied to the drive circuit 53, to quickly straight sliding of the front lens system 30 to the P 2 position on the optical axis from P 1 position by the motor 54.
この前玉系30の光軸方向の移動により第２図に示す二
次元曲線全体が変形しながら略Ｚ方向にシフトされるこ
とになる。Due to the movement of the front lens system 30 in the optical axis direction, the entire two-dimensional curve shown in FIG. 2 is shifted in the substantially Z direction while being deformed.
例えば、前記前玉系30の構成において、モータ54へ通
じる伝達機構をクラッチ機構等により遮断できる構成と
すれば手動操作でも行なえる構成となる。For example, in the configuration of the front lens system 30, if the transmission mechanism communicating with the motor 54 can be disconnected by a clutch mechanism or the like, the configuration can be performed even by manual operation.
演算器43のテーブル内にはこのシフト量に対応した値
が記憶されており、前記スイッチ52のON情報と前記前玉
系30がP2位置にあることを検出して前記テーブル内でシ
フト量を加味した補正量を読み取り、その結果に基づい
てドライブ回路47に制御信号を供給してモータ48により
撮像素子34を光軸上の合焦位置に移動させる構成として
いる。The inside of the arithmetic unit 43 table and the stored value corresponding to the shift amount, a shift amount in said table the front lens system 30 and ON information of the switch 52 will detect that it is in P 2 position Is read, a control signal is supplied to a drive circuit 47 based on the result, and the motor 48 moves the image sensor 34 to a focus position on the optical axis.
更に、このテレ化撮影状態時において、マクロ撮影を
望む場合には、スイッチ57をONすることになる。Further, in this telephoto shooting state, if macro shooting is desired, the switch 57 is turned on.
このON信号に基づき演算回路43より、再びドライブ回
路53に駆動信号が供給され、モータ54により前玉系30を
光軸上P3位置に直進摺動させる。The from the arithmetic circuit 43 based on the ON signal is supplied drive signal to the drive circuit 53 again to straight sliding of the front lens system 30 on the optical axis P 3 position by the motor 54.
これにより、第２図に示す二次元曲線が前玉系30がP2
の位置にある時よりも、更にＺ方向にシフトされ、これ
まで撮影不可能範囲であった撮像素子34の移動範囲の外
に位置するマクロ領域の補正曲線（一点鎖線で示す曲
線）が撮影可能範囲までシフトされることになる。Thus, the two-dimensional curve front lens system 30 shown in Figure 2 is P 2
Is further shifted in the Z-direction than when the camera is in the position, and a correction curve (curve indicated by a dashed-dotted line) of a macro area located outside the movement range of the image sensor 34, which has been a non-capturable range, can be captured. Will be shifted to the range.
従って、前玉系30のP3位置への移動時のシフト量も前
述のP2位置の場合と同様、予め演算回路43のテーブル内
に記憶されており、前記スイッチ57のON情報と前玉系30
のP3位置への移動検出信号とにより前記シフト量を加味
した補正値を読み取り、これに基づき撮像素子34を合焦
位置に移動させ、テレ時のマクロ撮像が行え、P2に対す
るP3位置への移動量が大の場合には、いわゆる顕微鏡相
当の撮影が可能になる。Therefore, as in the case of the shift amount P 2 position of the above when moving to the front lens system 30 P 3 position of, are stored in advance in the arithmetic circuit 43 of the table, ON information and the front lens of the switch 57 System 30
It reads the correction value in consideration of the shift amount by the movement detection signal to the P 3 position, this moving the image pickup device 34 to the in-focus position based on, can macro imaging during tele, P 3 position relative to P 2 When the amount of movement to is large, a so-called microscope-equivalent shooting becomes possible.
又、ワイド化撮影時には、ズームスイッチ49をワイド
化方向に操作することにより行うことができる。Further, at the time of widening photographing, it can be performed by operating the zoom switch 49 in the widening direction.
更に、本実施例の撮像装置では、一層のワイド化機能
を有するもので、この機構につき第３図及び第４図を参
照して説明する。Further, the image pickup apparatus of this embodiment has a further widening function, and this mechanism will be described with reference to FIGS. 3 and 4. FIG.
同図は、撮像装置の前面側より前玉系30近傍を図示し
た概略部分図で、前玉系30の移動前と移動後を示した図
面である。FIG. 2 is a schematic partial view showing the vicinity of the front lens system 30 from the front side of the imaging apparatus, and is a drawing showing the front lens system 30 before and after movement.
第３図において、60は筐体部でこの筐体部60内に前玉
系30が収納されており、この前玉系30は環状支持部61に
より保持され、この環状支持部61は支軸62に軸支される
レバー63の一端側に固定されている。In FIG. 3, reference numeral 60 denotes a housing, in which the front lens system 30 is housed. The front lens system 30 is held by an annular support 61, and the annular support 61 is supported by a support shaft. It is fixed to one end of a lever 63 pivotally supported by 62.
レバー63の他端側は、途中折曲して筐体部60に形成さ
れた溝部64を通じて筐体部60の外部に臨み、この他端側
が操作部65を形成している。The other end of the lever 63 is bent halfway and faces the outside of the housing 60 through a groove 64 formed in the housing 60, and the other end forms an operation unit 65.
65,66及び67は磁石で、磁石65及び66は環状支持部61
に固着され、磁石67は支持部材68を介して筐体部60側に
固定されており、 常態時、磁石65が磁石67に吸着されて環状支持部61を
所定位置（レバー63のQ1位置）に固定保持している。65, 66 and 67 are magnets, and magnets 65 and 66 are annular support portions 61.
Is fixed to the magnet 67 is Q 1 position of the support member 68 via a are fixed to the housing portion 60 side, at ordinary state, place the annular support 61 magnet 65 is attracted to the magnet 67 (the lever 63 ).
又、環状支持部61には歯車70が固定され、常態時筐体
部60側に固定されるモータ54に連結される歯車71と噛合
している。Further, a gear 70 is fixed to the annular support portion 61, and meshes with a gear 71 connected to the motor 54 fixed to the casing 60 side in a normal state.
今、レバー63の操作部64を常態時のQ1位置よりQ2に移
動させると、レバー63が支軸62を支点に第３図上時計方
向の回動せられて、歯車70と歯車71との噛合が外れ、こ
の歯車70と前記前玉系30とが光軸上を外れ光路外の位置
に移動せられ、磁石66が磁石67に吸着されて、環状支持
部61をその位置（レバー63のQ2位置）に固定保持する。Now, moving the operating portion 64 of the lever 63 to Q 2 from Q 1 position of the normal state, the lever 63 is canceler rotation of the third drawing clockwise fulcrum shaft 62, the gear 70 and the gear 71 The gear 70 and the front lens system 30 are displaced on the optical axis and moved to a position outside the optical path, and the magnet 66 is attracted to the magnet 67, and the annular support 61 is moved to its position (lever). for fixedly holding the 63 Q 2 position of).
この前玉系30の回路外の移動により第２図に示す二次
元曲線が全体的にＷ方向にシフトされることになり、焦
点距離が同図上、下方にシフトされることになる。Due to the movement of the front lens system 30 outside the circuit, the two-dimensional curve shown in FIG. 2 is shifted as a whole in the W direction, and the focal length is shifted downward in FIG.
従って、焦点距離の下方へのシフトによりワイド化方
向への撮像範囲が広がると共に、被写体深度が深くな
り、広い範囲での撮像が可能となる。いわゆるパンフォ
ーカス状態となる。Therefore, the downward shift of the focal length widens the imaging range in the widening direction, increases the depth of the subject, and enables imaging in a wide range. This is a so-called pan focus state.
一方、操作部64のQ2位置への移動に伴ないレバー63の
一端がリミットスイッチ66を押圧してON状態にする。One end of wake no lever 63 to move to Q 2 position of the operating portion 64 is in the ON state by pressing the limit switch 66.
同時に、このON信号は演算回路43に供給され、この信
号に基づき演算回路43では制御信号を生成し、この制御
信号によりドライド回路50を通じてモータ51によりズー
ム系31をワイド端近傍（第１図上Ｘ方向）に移動させ
る。At the same time, the ON signal is supplied to the arithmetic circuit 43, and based on this signal, the arithmetic circuit 43 generates a control signal, and the control signal is used to drive the zoom system 31 near the wide end by the motor 51 through the dry circuit 50 (see FIG. 1). X direction).
又、演算回路43では前記ON信号に基づき、演算回路43
内のテーブルで予め記憶されている焦点距離の前記シフ
ト量を読み取り、これに基づき撮像装置34を合焦位置に
移動させ、ワイド化撮像を可能にする。In addition, the arithmetic circuit 43 calculates the arithmetic circuit 43 based on the ON signal.
The shift amount of the focal length stored in advance is read from the table in the table, and based on the read amount, the imaging device 34 is moved to the in-focus position to enable wide-angle imaging.
従って、前記実施例によれば、前玉系30を変倍の為に
移動させ、結像系32若しくは、撮像素子34を合焦の為に
移動される構成としている為にテレ化及びワイド化用の
コンバーションレンズをわざわざ装着する必要がなく、
一層のテレ化及びワイド化機構を持たせることができる
と共に、レンズ口径を小さくしかもコンパーションレン
ズを装着したときよりもレンズ枚数を減らすことができ
る為に装置の小型化が可能となる。Therefore, according to the above-described embodiment, the front lens system 30 is moved for zooming, and the imaging system 32 or the image sensor 34 is moved for focusing. There is no need to attach a conversion lens for
A further telephoto and widening mechanism can be provided, and the size of the apparatus can be reduced because the lens diameter can be reduced and the number of lenses can be reduced as compared with the case where a compartment lens is mounted.
更に、前玉系30を光軸外に移動させた場合には自動的
にズーム系31がワイド端方向に移動するので、わざわざ
スイッチ49を操作する手間がいらなくなり、すばやいワ
イド化撮影が可能となる。Furthermore, when the front lens system 30 is moved out of the optical axis, the zoom system 31 automatically moves in the wide end direction, so that there is no need to operate the switch 49, which enables quick wide-angle shooting. Become.
又、二段切換時（前玉系30をP3位置に移動させた時）
には、顕微鏡相当の撮影も可能となる。Further, (when the front lens system 30 is moved to the P 3 position) two-stage switching
In this case, it becomes possible to take a picture equivalent to a microscope.
尚、前玉系30を光軸外に移動させる構成としては、ス
クリュー等により前玉系30を取り外し可能にする構成と
しても良い。In addition, as a configuration for moving the front lens system 30 out of the optical axis, a configuration in which the front lens system 30 can be removed by a screw or the like may be adopted.
（発明の効果） 上述の如く、請求項（１）記載の装置は、 光軸上に少なくとも第１のレンズ系と第２のレンズ系
と第３のレンズ系とを順次異配置してズーム系を構成
し、このズーム系から供給される撮像光を撮像素子に供
給して撮像信号を得るようにした撮像装置において、 前記第１のレンズ系と前記第２のレンズ系とを互いに
独立して移動可能にし、前記ズーム系の一部である前記
第１のレンズ系が光軸外に移動された際に、前記第２の
レンズ系を光軸上を移動させて変倍像を得るようにする
と共に、前記第３のレンズ系又は前記撮像素子の少なく
も一方をフォーカシングのための可動部として構成した
ことを特徴とする撮像装置としたので、わざわざワイド
化用のコンバージョンレンズを装着する必要がなく、一
層のワイド化機能を持たせることが出来ると共に、コン
バージョンレンズを装着した時よりも装置の小型化が可
能となる。(Effect of the Invention) As described above, the apparatus according to claim (1) is a zoom system in which at least a first lens system, a second lens system, and a third lens system are sequentially arranged differently on an optical axis. And an imaging device configured to supply imaging light supplied from the zoom system to an imaging device to obtain an imaging signal, wherein the first lens system and the second lens system are independent of each other. When the first lens system, which is a part of the zoom system, is moved off the optical axis, the second lens system is moved on the optical axis to obtain a zoomed image. In addition, since at least one of the third lens system and the image pickup device is configured as a movable portion for focusing, it is necessary to attach a conversion lens for widening. With a wider function With it can to miniaturization of the apparatus than when wearing the conversion lens becomes possible.
又、請求項（２）記載の装置は、 （２）請求項（１）記載の撮像装置において、前記第１
のレンズ系が光軸外に移動された際、第２のレンズ系が
光軸上のワイド端近傍に移動せられる構成であることを
特徴とする撮像装置としたので、請求項（１）記載の装
置の効果に加え、わざわざ第２のレンズ系を移動させる
動作を介在させる必要がなく、すばやい撮像態勢ができ
る。Further, the apparatus according to claim (2) is: (2) the imaging apparatus according to claim (1), wherein the first
The image pickup apparatus according to claim 1, wherein the second lens system is moved near the wide end on the optical axis when the lens system is moved off the optical axis. In addition to the effect of the device described above, there is no need to intervene the operation of moving the second lens system, and a quick image pickup operation can be performed.
更に、請求項（３）記載の装置は、 （３）請求項（１）記載の撮像装置において、 前記第１のレンズ系が光軸外と光軸上とを移動する構
成としたことを特徴とする撮像装置としたので、請求項
（１）記載の装置の効果に加え、テレ化用のコンバージ
ョンレンズを装着することなく、一層のテレ化機能を持
たせることができる等の効果を奏する。(3) The imaging device according to (1), wherein the first lens system is moved outside the optical axis and on the optical axis. Therefore, in addition to the effect of the device described in claim (1), there is an effect that the telephoto function can be further provided without mounting a telephoto conversion lens.
第１図は本発明装置の一実施例を示す概略ブロック系統
図、第２図はズーム時の原理説明図、第３図及び第４図
は本発明装置の前面側より前玉系を示した概略部分図
で、第３図は前玉系の移動前の状態図、第４図は前玉系
の移動後の状態図、第５図は従来の撮像装置の概略ブロ
ック図である。 30,……前玉系、31……ズーム系、 31a,31b,32b……凹レンズ系、 32……結像系、 32a,32c,62a,62c……凸レンズ系、 34……撮像素子、43……演算回路、 44,46,……位置センサ、 51,54,……モータ、52,57,……スイッチ。 63……レバー、64……溝部、 66……リミットスイッチ、70,71……歯車。FIG. 1 is a schematic block diagram showing an embodiment of the apparatus of the present invention, FIG. 2 is a view for explaining the principle of zooming, and FIGS. 3 and 4 show a front lens system from the front side of the apparatus of the present invention. 3 is a state diagram before the front lens system is moved, FIG. 4 is a state diagram after the front lens system is moved, and FIG. 5 is a schematic block diagram of a conventional imaging apparatus. 30, front lens system, 31 zoom system, 31a, 31b, 32b concave lens system, 32 imaging system, 32a, 32c, 62a, 62c convex lens system, 34 imaging device, 43 …… Calculation circuit, 44,46, …… Position sensor, 51,54, …… Motor, 52,57, …… Switch. 63 ... Lever, 64 ... Groove, 66 ... Limit switch, 70,71 ... Gear.
Claims (3)
のレンズ系と第３のレンズ系とを順次配置してズーム系
を構成し、このズーム系から供給される撮像光を撮像素
子に供給して撮像信号を得るようにした撮像装置におい
て、 前記第１のレンズ系と前記第２のレンズ系とを互いに独
立して移動可能にし、前記ズーム系の一部である前記第
１のレンズ系が光軸外に移動された際に、前記第２のレ
ンズ系を光軸上を移動させて変倍像を得るようにすると
共に、前記第３のレンズ系又は前記撮像素子の少なくも
一方をフォーカシングのための可動部として構成したこ
とを特徴とする撮像装置。A first lens system and a second lens system on an optical axis;
An image pickup apparatus in which a lens system and a third lens system are sequentially arranged to form a zoom system, and imaging light supplied from the zoom system is supplied to an imaging element to obtain an imaging signal. The first lens system and the second lens system can be moved independently of each other, and when the first lens system, which is a part of the zoom system, is moved off the optical axis, the second lens system is moved. An imaging system wherein a lens system is moved on an optical axis to obtain a zoomed image, and at least one of the third lens system and the imaging device is configured as a movable portion for focusing. apparatus.
記第１のレンズ系が光軸外に移動された際、第２のレン
ズ系が光軸上のワイド端近傍に移動せられる構成である
ことを特徴とする撮像装置。2. The image pickup apparatus according to claim 1, wherein when the first lens system is moved off the optical axis, the second lens system is moved near the wide end on the optical axis. An imaging device, characterized in that:
記第１のレンズ系が光軸外と光軸上とを移動する構成と
したことを特徴とする撮像装置。3. An imaging apparatus according to claim 1, wherein said first lens system is configured to move outside the optical axis and on the optical axis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2259277A JP2833188B2 (en) | 1990-09-28 | 1990-09-28 | Imaging device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2259277A JP2833188B2 (en) | 1990-09-28 | 1990-09-28 | Imaging device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04136907A JPH04136907A (en) | 1992-05-11 |
| JP2833188B2 true JP2833188B2 (en) | 1998-12-09 |
Family
ID=17331859
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2259277A Expired - Lifetime JP2833188B2 (en) | 1990-09-28 | 1990-09-28 | Imaging device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2833188B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2900962B2 (en) * | 1992-09-17 | 1999-06-02 | 日本ビクター株式会社 | Imaging device |
| JP5212818B2 (en) * | 2008-12-19 | 2013-06-19 | 株式会社リコー | Lens barrel, lens driving device, camera, digital camera, portable information terminal device, and image input device |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5238199Y2 (en) * | 1974-09-13 | 1977-08-31 | ||
| JPS63276011A (en) * | 1987-05-07 | 1988-11-14 | Matsushita Electric Ind Co Ltd | Zoom lens device |
| JP2750590B2 (en) * | 1988-12-23 | 1998-05-13 | 旭光学工業株式会社 | Zoom lens camera with built-in converter |
| JPH02179628A (en) * | 1988-12-29 | 1990-07-12 | Minolta Camera Co Ltd | Camera provided with zooming mechanism |
-
1990
- 1990-09-28 JP JP2259277A patent/JP2833188B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04136907A (en) | 1992-05-11 |
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