JP2666142B2 - Automatic focus detection device for camera - Google Patents
Automatic focus detection device for cameraInfo
- Publication number
- JP2666142B2 JP2666142B2 JP63023158A JP2315888A JP2666142B2 JP 2666142 B2 JP2666142 B2 JP 2666142B2 JP 63023158 A JP63023158 A JP 63023158A JP 2315888 A JP2315888 A JP 2315888A JP 2666142 B2 JP2666142 B2 JP 2666142B2
- Authority
- JP
- Japan
- Prior art keywords
- lens
- optical system
- camera
- detection device
- photographing lens
- 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 - Fee Related
Links
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B2213/00—Viewfinders; Focusing aids for cameras; Means for focusing for cameras; Autofocus systems for cameras
- G03B2213/02—Viewfinders
- G03B2213/025—Sightline detection
Landscapes
- Automatic Focus Adjustment (AREA)
- Focusing (AREA)
Description
【発明の詳細な説明】 発明の目的 （産業上の利用分野） 本発明は、オートフォーカス光学系を有するカメラの
自動焦点検出装置の改良に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in an automatic focus detection device for a camera having an autofocus optical system.
（従来の技術） 従来から、オートフォーカス光学系を有するカメラの
自動焦点検出装置がある。たとえば、第18図は、オート
フォーカス光学系を有する一眼レフカメラの自動焦点検
出装置の光学性の概略構成を示している。その第18図に
おいて、１は撮影レンズ３、２は被写体、３は視野マス
ク、４はコンデンサレンズ、５は絞りマスク、６、７は
像分割光学素子としてのセパレータレンズ、８は受光素
子としてのCCDであり、視野マスク３、コンデンサレン
ズ４、絞りマスク５、セパレータレンズ６、７、CCD8は
オートフォーカス光学系９を構成し、このオートフォー
カス光学系９はモジュール化されてフォーカスユニット
を構成する。(Prior Art) Conventionally, there is an automatic focus detection device of a camera having an autofocus optical system. For example, FIG. 18 shows a schematic configuration of optical properties of an automatic focus detection device of a single-lens reflex camera having an autofocus optical system. In FIG. 18, 1 is a photographing lens 3, 2 is a subject, 3 is a field mask, 4 is a condenser lens, 5 is an aperture mask, 6 and 7 are separator lenses as image dividing optical elements, and 8 is a light receiving element. It is a CCD, and the field mask 3, condenser lens 4, aperture mask 5, separator lenses 6, 7 and CCD 8 constitute an autofocus optical system 9, and the autofocus optical system 9 is modularized to constitute a focus unit.
オートフォーカス光学系９の視野マスク３はフィルム
等価面10の近傍に設けられている。フィルム等価面10は
撮像レンズ１を介して被写体２と光学的に共役な位置関
係にある。そのフィルム等価面10には、撮影レンズ１が
合焦状態にあるときに被写体２の像11がピントの合った
状態で形成されるものである。コンデンサレンズ４と絞
りマスク５とは、撮影レンズ１の左右を通過する撮影光
を二つの光束に分割する機能を有し、セパレータレンズ
６、７は、コンデンサレンズ４を介して撮影レンズ１と
光学的に共役な位置関係にある。The field mask 3 of the autofocus optical system 9 is provided near the film equivalent surface 10. The film equivalent surface 10 is in an optically conjugate positional relationship with the subject 2 via the imaging lens 1. On the film equivalent surface 10, an image 11 of the subject 2 is formed in focus when the taking lens 1 is in focus. The condenser lens 4 and the aperture mask 5 have a function of dividing photographing light passing right and left of the photographing lens 1 into two light beams, and the separator lenses 6 and 7 are optically connected to the photographing lens 1 via the condenser lens 4. Have a conjugated positional relationship.
そのセパレータレンズ６、７は、第19図に模式的に示
すように、水平方向に配置されており、カメラ本体に設
けられたファインダーの中央測距ゾーン（第22図の符号
17参照）と光学的に共役な位置にある測距ゾーン12を介
して、レンズマウント（図示を略す）に搭載された撮影
レンズ１の射出瞳13の仮想的な開口領域14、15を覗いて
いる。セパレータレンズ６、７には、その開口領域14、
15を通過した光束が採り込まれるもので、セパレータレ
ンズ６、７によってフィルム等価面10に形成された像11
がCCD8上の２つの領域に像11′として再形成される。The separator lenses 6 and 7 are arranged in a horizontal direction as schematically shown in FIG. 19, and are located in a center distance measuring zone (reference numeral in FIG. 22) of a finder provided in the camera body.
17) through the distance measurement zone 12 optically conjugate with the virtual opening areas 14, 15 of the exit pupil 13 of the taking lens 1 mounted on a lens mount (not shown). I have. The separator lenses 6 and 7 have their open areas 14 and
The luminous flux passing through 15 is taken in, and the image 11 formed on the film equivalent surface 10 by the separator lenses 6 and 7 is obtained.
Are re-formed as images 11 'in two areas on the CCD 8.
その再形成された像11′の合焦時（第20図（ａ）参
照）の像間隔を第21図に示すようにl0とする。これに対
して、第20図（ｂ）に示すように合焦時に較べて前側で
撮影レンズ１のピントがあっているときには、像間隔が
狭まってこれに対応する信号Ｓの間隔がl0よりも小さく
なり、第20図（ｃ）に示すように合焦時に較べて後側で
撮影レンズ１のピントが合っているときには第21図に示
すように像間隔が広がってこれに対応する信号Ｓの間隔
がl0よりも大きくなる。And l 0 to indicate image distance during focusing of the reshaped image 11 '(see FIG. 20 (a)) in FIG. 21. In contrast, when it is in focus of the photographing lens 1 in the front compared to the in-focus state as shown in FIG. 20 (b), the interval of the signal S corresponding thereto narrowed image interval than l 0 When the photographing lens 1 is in focus on the rear side as compared with the in-focus state as shown in FIG. 20 (c), the image interval widens as shown in FIG. interval is greater than l 0 of.
この像間隔の変化が撮影レンズ１のデフォーカス量に
比例することから、たとえば、従来の一眼レフカメラの
自動焦点検出装置では、そのCCD8の像間隔を検出し、こ
れを演算処理して撮影レンズ１のデフォーカス方向とデ
フォーカス量とにより、撮影レンズ１を合焦位置に可動
させるものとなっている。そして、たとえば、第22図に
示すように、ファインダー16の中央に設けられた中央測
距ゾーン17に所望の被写体２が入るように構図を決め、
測距を行なうと、自動的に撮影レンズ１が合焦状態にま
で移動され、その状態で撮影を行なうと、被写体２にピ
ントが合った撮影写真を得ることができる。Since the change in the image interval is proportional to the defocus amount of the photographing lens 1, for example, in an automatic focus detection device of a conventional single-lens reflex camera, the image interval of the CCD 8 is detected, and the arithmetic operation is performed to calculate the image interval. The imaging lens 1 can be moved to a focus position by the defocus direction and the defocus amount of 1. Then, for example, as shown in FIG. 22, the composition is determined so that the desired subject 2 enters the central ranging zone 17 provided in the center of the viewfinder 16,
When the distance measurement is performed, the photographing lens 1 is automatically moved to a focused state. When photographing is performed in that state, a photographed photograph in which the subject 2 is in focus can be obtained.
（発明が解決しようとする課題） ところで、この従来の一眼レフカメラの自動焦点検出
装置では、測距ゾーンがファインダー16の中央に設けら
れているので、このままでは得られた写真は所望の被写
体２が写真中央に位置することになる。しかし、所望の
被写体２を中央ではなくて写真周辺に配置した撮影写真
を得たい場合がある。そこで、従来の一眼レフカメラに
は、そのことを考慮して、フォーカスロック機構を設け
てあり、被写体２をファインダー16の中央に位置させて
被写体２までの距離を自動的に測距し、その状態でフォ
ーカスロックをかけ、第23図に示すようにフレーミング
を行なって撮影すれば、周辺部に所望の被写体２を配置
した撮影写真を得ることができるようになっている。(Problems to be Solved by the Invention) In the conventional automatic focus detection device of the single-lens reflex camera, the distance measurement zone is provided at the center of the viewfinder 16, so that a photograph obtained as it is is a desired subject 2 Is located at the center of the photo. However, there is a case where it is desired to obtain a photograph in which the desired subject 2 is arranged not in the center but in the periphery of the photograph. Therefore, the conventional single-lens reflex camera is provided with a focus lock mechanism in consideration of this fact, and the subject 2 is positioned at the center of the viewfinder 16 to automatically measure the distance to the subject 2. If focus lock is applied in this state, and framing is performed as shown in FIG. 23 to take a picture, it is possible to obtain a photographic picture in which a desired subject 2 is arranged around the periphery.
ところが、この従来の一眼レフカメラの自動焦点検出
装置では、被写体２を一度ファインダー16の中央に位置
させ、撮影レンズ１を合焦状態にまで移動させ、この状
態でフォーカスロックをかけて撮影レンズ１を固定し、
構図を決めなおして撮影を行なうという撮影手順を踏ま
なければならないために、撮影操作に手間がかかりすぎ
るという問題点がある。However, in the conventional automatic focus detection device for a single-lens reflex camera, the subject 2 is once positioned at the center of the viewfinder 16, the photographic lens 1 is moved to a focused state, and the photographic lens 1 is locked by focusing in this state. And fix
Since the photographing procedure of recomposing and photographing must be performed, there is a problem that the photographing operation takes too much time.
そこで、本発明の目的は、所望の被写体が画面の中央
にない撮影写真を得たい場合に面倒な撮影手順を踏まな
くとも、その中央にない被写体までの距離を自動的に測
距し、レンズマウントに搭載した撮影レンズを可動させ
て撮影レンズの合焦を行なうことにより、所望の被写体
が中央に配置されていない撮影写真を得るための撮影操
作を手軽に迅速に行なうことのできるカメラの自動焦点
検出装置を提供することにある。Therefore, an object of the present invention is to automatically measure a distance to a subject not located in the center of the screen without taking a troublesome shooting procedure when a desired subject is desired to be taken at the center of the screen without taking a troublesome shooting procedure. By moving the photographing lens mounted on the mount and focusing the photographing lens, an automatic camera that can easily and quickly perform a photographing operation to obtain a photographed photograph in which the desired subject is not located at the center. It is to provide a focus detection device.
（課題を解決するための手段） 本発明に係る請求項１のカメラの自動焦点検出装置
は、カメラの撮影レンズを介して入射する光束の一部を
導いて、前記カメラのファインダー視野内に設けられた
前記ファインダーの視野略中央のゾーンと光学的に略共
役な位置における前記光束の焦点状態を検出する中央部
オートフォーカス光学系および前記ファンダー視野の略
中央のゾーンとは異なる位置の所定ゾーンと光学的に略
共役な位置における前記光束の焦点状態を検出する周辺
部オートフォーカス光学系からなるオートフォーカス光
学系を有する自動焦点検出装置において、前記周辺部オ
ートフォーカス光学系が採り込む光束の向きが前記撮影
レンズの射出瞳の方向に向かうように角度変更可能な角
度変更手段を有することを特徴とする。(Means for Solving the Problems) An automatic focus detection device for a camera according to claim 1 of the present invention guides a part of a light beam incident through a photographing lens of the camera and provides the light beam in a viewfinder field of the camera. A central autofocus optical system for detecting a focus state of the light beam at a position substantially optically conjugate to a zone substantially at the center of the field of view of the finder, and a predetermined zone at a position different from a zone substantially at the center of the field of view of the funder An autofocus optical system having an autofocus optical system including a peripheral autofocus optical system for detecting a focus state of the light beam at a position substantially optically conjugate with the direction of the light beam taken in by the peripheral autofocus optical system. Has angle changing means capable of changing the angle so as to be directed to the exit pupil of the photographing lens.
請求項２の発明は、前記角度変更手段が撮影レンズの
カメラ本体への装着時に前記撮像レンズの鏡筒に設けた
係合部とこの係合部により作動させられる機械的連動手
段によって構成されていることを特徴とする。According to a second aspect of the present invention, the angle changing means is constituted by an engaging portion provided on the lens barrel of the imaging lens when the taking lens is mounted on the camera body, and a mechanical interlocking device operated by the engaging portion. It is characterized by being.
請求項３の発明は、前記周辺部オートフォーカス光学
系の中心光軸は、前記撮影レンズのカメラ本体への装着
時に、前記撮影レンズの鏡筒に設けた係合部とこの係合
部により作動させられる機械的連動手段とにより略前記
撮影レンズの射出瞳の中心方向を向くように設定されて
いることを特徴とする。According to a third aspect of the present invention, the central optical axis of the peripheral autofocus optical system is operated by an engaging portion provided on a barrel of the photographing lens and the engaging portion when the photographing lens is mounted on a camera body. It is characterized in that it is set so as to be directed substantially toward the center of the exit pupil of the photographing lens by mechanical interlocking means.
請求項４の発明は、請求項１の発明において、さらに
撮影レンズの情報を入力し、その入力情報に基づいて前
記角度変更手段を制御する制御手段を有することを特徴
とする。According to a fourth aspect of the present invention, in the first aspect of the present invention, there is further provided a control means for inputting information of a photographing lens and controlling the angle changing means based on the input information.
請求項５の発明は、前記角度変更手段が各オートフォ
ーカス光学系を構成するフォーカスユニットの前面に設
けられた光透過性回転盤によって形成されていることを
特徴とする。The invention according to claim 5 is characterized in that the angle changing means is formed by a light transmissive rotating disk provided on a front surface of a focus unit constituting each autofocus optical system.
（作用） 本発明に係るカメラの自動焦点検出装置は、中央部オ
ートフォーカス光学系により画面中央の被写体の焦点位
置が自動的に検出され、周辺部オートフォーカス光学系
により画面中央部にない被写体の焦点位置が自動的に検
出される。これにより、所望の被写体が画面の中央にな
い撮影写真を得たい場合にも、面倒な撮影手順を踏まな
くともその周辺部オートフォーカス光学系を用いて、被
写体までの距離を自動的に測距し、迅速に撮影できる。
また、この周辺部オートフォーカス光学系は、撮影レン
ズのカメラ本体への装着に応じて光束の向きが撮影レン
ズの射出瞳の方向に向かうように調整又は設定される。
これにより、撮影レンズのレンズ性能、たとえば、撮影
レンズが短焦点であるか長焦点であるかに応じて周辺部
オートフォーカス光学系が撮影レンズの射出瞳を覗く角
度に調整され、ビネッティングの影響を受けることがな
く、また、オートフォーカス系の検出精度が劣化するこ
ともない。(Function) In the automatic focus detection device for a camera according to the present invention, the focus position of the subject at the center of the screen is automatically detected by the central autofocus optical system, and the focus of the subject not at the center of the screen is detected by the peripheral autofocus optical system. The focus position is automatically detected. This makes it possible to automatically measure the distance to the subject by using the autofocus optical system in the periphery even if you want to take a photograph in which the desired subject is not in the center of the screen, without having to take any troublesome shooting procedures. And you can shoot quickly.
The peripheral autofocus optical system is adjusted or set so that the direction of the light beam is directed toward the exit pupil of the photographing lens in accordance with the mounting of the photographing lens on the camera body.
This allows the peripheral autofocus optical system to be adjusted to an angle that looks into the exit pupil of the photographic lens, depending on the lens performance of the photographic lens, for example, whether the photographic lens has a short focus or a long focus. And the detection accuracy of the autofocus system is not degraded.
（実施例） 以下に、本発明に係るカメラの自動焦点検出装置の実
施例を図面を参照しつつ説明する。(Embodiment) Hereinafter, an embodiment of an automatic focus detection device for a camera according to the present invention will be described with reference to the drawings.
第１図〜第14図は本発明に係るカメラの自動焦点検出
装置の第１実施例を説明するためのものである。ここで
は、一眼レフカメラに適用した場合について説明する。
第10図はその一眼レフカメラの自動焦点検出装置の光学
系を概念的に示している。この第10図において、従来例
と同一構成要素については、同一符号が付されている。
その第10図において、13は中央部オートフォーカス光学
系９の測距ゾーン12から覗いた撮影レンズ１の射出瞳
（実線で示されている方）である。この射出瞳13は第12
図に示すように略円形である。また、セパレータレンズ
６、７から覗いた開口領域14、15は略楕円形である。1 to 14 illustrate a first embodiment of an automatic focus detection device for a camera according to the present invention. Here, a case where the present invention is applied to a single-lens reflex camera will be described.
FIG. 10 conceptually shows an optical system of the automatic focus detection device of the single-lens reflex camera. In FIG. 10, the same components as those of the conventional example are denoted by the same reference numerals.
In FIG. 10, reference numeral 13 denotes an exit pupil (the one indicated by a solid line) of the photographing lens 1 viewed from the distance measuring zone 12 of the central autofocus optical system 9. This exit pupil 13 is the twelfth
It is substantially circular as shown in the figure. The opening areas 14, 15 viewed from the separator lenses 6, 7 are substantially elliptical.
ここでは、オートフォーカス光学系９の左右両側に、
周辺部測距用の周辺部オートフォーカス光学系18、19が
設けられている。オートフォーカス光学系18は、たとえ
ば、一対の像分割光学素子としてのセパレータレンズ2
0、21とCCD22とから概略構成されている。また、オート
フォーカス光学系19は一対の像分割光学素子としてのセ
パレータレンズ23、24とCCD25とから概略構成されてい
る。Here, on the left and right sides of the autofocus optical system 9,
Peripheral autofocus optical systems 18 and 19 for peripheral distance measurement are provided. The autofocus optical system 18 includes, for example, a separator lens 2 as a pair of image dividing optical elements.
It is roughly composed of 0, 21 and CCD22. Further, the autofocus optical system 19 is schematically constituted by a pair of separator lenses 23 and 24 as a pair of image division optical elements and a CCD 25.
カメラ本体Ａに設けられたファインダー16には、第11
図に示すように、その周辺部測距用のオートフォーカス
光学系18、19に対応させて、その中央測距ゾーン17の左
右両側に周辺部測距ゾーン26、27が設けられている。こ
の周辺部測距ゾー26、27はオートフォーカス光学系18、
19の測距ゾーン28、29と光学的に略共役な位置関係にあ
るものとされている。The viewfinder 16 provided on the camera body A has an eleventh
As shown in the figure, peripheral distance measuring zones 26 and 27 are provided on both left and right sides of the central distance measuring zone 17 in correspondence with the peripheral distance autofocus optical systems 18 and 19, respectively. These peripheral distance measuring zones 26 and 27 are auto focus optical system 18,
It is assumed that they have a substantially optically conjugate positional relationship with the 19 ranging zones 28 and 29.
第10図において、セパレータレンズ20、21、セパレー
タレンズ23、24は、それぞれ上下方向に配置され、図示
を略すコンデンサレンズ４を介して撮影レンズ１の射出
瞳13と光学的に略共役な配置関係とされ、測距ゾーン2
8、29を介してその射出瞳13の上下方向の開口領域30、3
1を覗いている。このようにセパレータレンズ20、21、
セパレータレンズ23、24を上下方向に配置したのは、撮
影レンズ１を介して測距ゾーン28、29に入射する光束
は、斜光束となり、測距ゾーン28、29から見た撮影レン
ズ１の射出瞳13はビネッティングを受けて第13図に示す
ように偏平につぶれた形状となっており、水平方向に開
口領域30、31を設けると、セパレータレンズ20、21（セ
パレータレンズ23、24）のレンズ間の基線長を十分に確
保することができず、ひいては、レンズの性能に低下を
来たして像間隔の検出精度が劣化するからである。In FIG. 10, the separator lenses 20, 21 and the separator lenses 23, 24 are arranged in the vertical direction, respectively, and are arranged substantially optically conjugate with the exit pupil 13 of the photographing lens 1 via a condenser lens 4 (not shown). And ranging zone 2
The vertical opening areas 30, 3 of the exit pupil 13 via 8, 29
Looking into one. Thus, the separator lenses 20, 21,
The reason why the separator lenses 23 and 24 are arranged in the vertical direction is that the light flux entering the distance measuring zones 28 and 29 via the photographing lens 1 becomes an oblique light beam, and the light emitted from the photographing lens 1 viewed from the distance measuring zones 28 and 29. The pupil 13 receives the vignetting and has a flattened shape as shown in FIG. 13, and when the opening regions 30 and 31 are provided in the horizontal direction, the pupils 13 of the separator lenses 20 and 21 (separator lenses 23 and 24) This is because a sufficient base line length between the lenses cannot be ensured, and as a result, the performance of the lenses deteriorates and the detection accuracy of the image interval deteriorates.
なお、その第10図において、ｌは撮影レンズ１の光
軸、l1はオートフォーカス光学系18の中心光軸、l2はオ
ートフォーカス光学系19の中心光軸であり、中心光軸
l1,l2は射出瞳13の中心O1で交わっている。また、l11は
セパレータレンズ20の光軸、l12はセパレータレンズ21
の光軸、l21はセパレータレンズ23の光軸、l22はセパレ
ータレンズ24の光軸であり、光軸l11、l21は開口領域31
の中心O2で交わっており、光軸l12、l22は開口領域30の
中心O3で交わっている。Note that in the FIG. 10, l is the optical axis of the taking lens 1, a central optical axis of l 1 is the central optical axis of the auto focus optical system 18, l 2 autofocus optical system 19, the central optical axis
l 1 and l 2 intersect at the center O 1 of the exit pupil 13. The optical axis of the l 11 the separator lens 20, l 12 the separator lenses 21
Of the optical axis, l 21 is the optical axis of the separator lenses 23, l 22 denotes an optical axis of the separator lenses 24, the optical axis l 11, l 21 are open regions 31
And meet at the center O 2, the optical axis l 12, l 22 are intersect at the center O 3 of the opening region 30.
このように周辺部測距用ゾーン26、27をファインダー
16の中央測距ゾーン17の左右両側に設け、その周辺部測
距ゾーンに対応させて周辺部測距用のオートフォーカス
光学系18、19を設けて、選択したい測距ゾーン17、26、
27（第11図参照）に対応するCCD8、22、25を駆動させる
と、その選択した測距ゾーン17、26、27に対応するオー
トフォーカス光学系９、18、19によって被写体２の測距
を自動的に行なうことが可能である。In this way, the peripheral distance measurement zones 26 and 27 are
Provided on both left and right sides of the 16 central ranging zone 17, and provided with autofocus optical systems 18 and 19 for peripheral ranging corresponding to the peripheral ranging zone, and the ranging zones 17, 26,
When the CCDs 8, 22, and 25 corresponding to 27 (see FIG. 11) are driven, the distance of the subject 2 is measured by the autofocus optical systems 9, 18, and 19 corresponding to the selected distance measuring zones 17, 26, and 27. It can be done automatically.
ところで、カメラ本体Ａには、第１図に示すように、
一般に、交換可能のレンズマウントＢが着脱可能とされ
ている。ここで、そのレンズマウントＢに搭載されてい
る撮影レンズ１が第９図に示すように長焦点レンズ32で
ある場合と第８図に示すように短焦点レンズ33である場
合とについて考える。By the way, as shown in FIG.
Generally, a replaceable lens mount B is detachable. Here, consider a case where the taking lens 1 mounted on the lens mount B is a long focus lens 32 as shown in FIG. 9 and a case where it is a short focus lens 33 as shown in FIG.
この場合、周辺部測距用のオートフォーカス光学系1
8、19の光軸l1、l2はその撮影レンズ１の光軸ｌとなす
角度θが一般には異なり、第14図に示すように、長焦点
レンズ32からなる撮影レンズ１の射出瞳34の開口領域3
5、38をオートフォーカス光学系18のセパレータレンズ2
0、21に覗かせ、射出瞳34の開口領域36、37をオートフ
ォーカス光学系19のセパレータレンズ23、24に覗かせた
ときのビネッティングの影響を考慮し、撮影レンズ１が
短焦点レンズ33、長焦点レンズ32のいずれかであるかに
よってセパレータレンズ20、21、23、24が撮影レンズ１
の射出瞳13、34を覗く角度を変更し、撮影レンズ１の光
軸ｌとオートフォーカス光学系18、19の光軸l1、l2とを
異ならせる構成としなければならない。なお、その第14
図において、39、40はセパレータレンズ６、７から覗い
た射出瞳34の開口領域である。In this case, the autofocus optical system 1
The angles θ formed by the optical axes l 1 and l 2 of the imaging lens 1 and the optical axis l 2 of the imaging lens 1 generally differ from each other. As shown in FIG. Open area 3
5 and 38 are autofocus optics 18 separator lens 2
In consideration of the effect of vignetting when the opening areas 36 and 37 of the exit pupil 34 are viewed through the separator lenses 23 and 24 of the autofocus optical system 19, the photographing lens 1 is set to the short focus lens 33. The separator lenses 20, 21, 23, and 24 depend on whether the lens is the long focal length lens 32 or the long focal length lens 32.
Must be changed so that the optical axis l of the photographing lens 1 and the optical axes l 1 and l 2 of the autofocus optical systems 18 and 19 are different. The 14th
In the figure, reference numerals 39 and 40 denote opening areas of the exit pupil 34 viewed from the separator lenses 6 and 7.
そこで、第１図に示すように、カメラ本体Ａ内に組み
込まれて各オートフォーカス光学系９、18、19を構成す
るフォーカスユニット50の前面に、周辺部測距用のオー
トフォーカス光学系18、19のセパレータレンズ20、21、
23、24が撮影レンズ１を覗く角度を変更するための光学
部材51が設けられている。いいかえれば、オートフォー
カス光学系18、19の採り込む光束の向きが撮影レンズ１
の射出瞳の方向に向かうように角度を変更するための角
度変更手段としての光学部材51が設けられている。この
光学部材51は、第２図、第４図に示すように、光透過性
回転盤により構成れている。この光学部材51は、たとえ
ば、プラスチック材料を用いて一体成形により製作され
る。Therefore, as shown in FIG. 1, an auto-focus optical system 18 for peripheral distance measurement is provided on the front surface of a focus unit 50 which is incorporated in the camera body A and constitutes each of the auto-focus optical systems 9, 18, 19. 19 separator lenses 20, 21,
An optical member 51 is provided for changing the angle at which the lens 23 and 24 look into the photographing lens 1. In other words, the direction of the luminous flux taken by the autofocus optical systems 18 and 19 is determined by the taking lens 1.
An optical member 51 is provided as angle changing means for changing the angle so as to be directed to the direction of the exit pupil. As shown in FIGS. 2 and 4, the optical member 51 is formed of a light-transmitting rotating disk. The optical member 51 is manufactured by integral molding using, for example, a plastic material.
光学部材51は、オートフォーカス光学系９に臨む中央
等厚透明部52と、その中央等厚透明部52の周辺に輪状に
形成されたプリズム部53とからなっている。そのプリズ
ム部53には、第５図〜第７図に示すように一対の等厚透
明部54、54と、それぞれ一対のプリズム55、55と56、56
とが設けられている。このプリズム55、55、56、56は、
光学部材51の内径側に対して外形側が肉厚となってい
る。ここで、プリズム55、56の頂角αは第５図、第７図
に示すように互いに異なるものとされている。プリズム
部53の機能については後述することにし、次に、この光
学部材51を支持する回転部材57について説明する。The optical member 51 is composed of a center-equally transparent part 52 facing the autofocus optical system 9 and a prism part 53 formed in a ring shape around the center-equivalent transparent part 52. As shown in FIGS. 5 to 7, the prism portion 53 has a pair of equal thickness transparent portions 54, 54 and a pair of prisms 55, 55, 56, 56, respectively.
Are provided. These prisms 55, 55, 56, 56
The outer side is thicker than the inner side of the optical member 51. Here, the vertex angles α of the prisms 55 and 56 are different from each other as shown in FIG. 5 and FIG. The function of the prism unit 53 will be described later, and next, the rotating member 57 that supports the optical member 51 will be described.
回転部材57は、ここでは、第２図に示すように、４個
のローラ58、58、58、58により回転可能に支承されてい
る。回転部材57には第３図に示すようにそのローラ58、
58、58、58を案内する案内溝59が外周に形成されてい
る。なお、ローラ58、58、58、58はこの実施例では支軸
59′に回転可能に軸支されるもので、支軸59′は、たと
えば、遮光板60に取付けられ、61はその遮光板60に穿設
された開口である。Here, the rotating member 57 is rotatably supported by four rollers 58, 58, 58, 58, as shown in FIG. As shown in FIG.
Guide grooves 59 for guiding 58, 58, 58 are formed on the outer periphery. The rollers 58, 58, 58, 58 are shafts in this embodiment.
The support shaft 59 'is rotatably supported by the shaft 59'. The support shaft 59 'is attached to, for example, a light shielding plate 60, and 61 is an opening formed in the light shielding plate 60.
回転部材57は、モータ62によって回転駆動されるもの
で、回転部材57の外周部には、モータ62の出力軸63に取
付けられた歯車64と噛合する歯車部65が設けられてい
る。モータ62は、モータ駆動回路66によって駆動される
もので、モータ駆動回路66はマイクロプロセッサ67の指
令に基づいて制御される。マイクロプロセッサ67は交換
レンズマウントＢに設けられているレンズROM68の情報
を受けてモータ駆動回路66を制御することにより、撮影
レンズの情報を入力し、その入力情報に基づいて角度変
更手段を制御する制御手段として機能する。なお、第１
図において、69はレンズマウントＢに設けられた接続ピ
ン、70はカメラ本体Ａに設けられた接続端子、第４図に
おいて、71は開口を示す。The rotating member 57 is driven to rotate by a motor 62, and a gear portion 65 meshing with a gear 64 attached to an output shaft 63 of the motor 62 is provided on an outer peripheral portion of the rotating member 57. The motor 62 is driven by a motor drive circuit 66, and the motor drive circuit 66 is controlled based on a command from the microprocessor 67. The microprocessor 67 receives the information of the lens ROM 68 provided in the interchangeable lens mount B and controls the motor drive circuit 66 to input the information of the photographing lens and control the angle changing means based on the input information. Functions as control means. The first
In the figure, 69 is a connection pin provided on the lens mount B, 70 is a connection terminal provided on the camera body A, and in FIG. 4, 71 is an opening.
マイクロプロセッサ67は、この実施例では、短焦点レ
ンズ33を有するレンズマウントＢがカメラ本体Ａに装着
されたときには、第８図に示すように、等厚透明部54が
測距ゾーン28、29に臨むようにモータ62を駆動制御し、
長焦点レンズ32を有するレンズマウントＢがカメラ本体
Ａに装着されたときには、第９図に示すように、プリズ
ム56が測距ゾーン28、29に臨むようにモータ62を駆動制
御してその位置で回転部材57の回転を停止させる。In this embodiment, when the lens mount B having the short focus lens 33 is mounted on the camera body A, the microprocessor 67 moves the equal thickness transparent portion 54 to the distance measuring zones 28 and 29, as shown in FIG. Drive control of the motor 62 to face it,
When the lens mount B having the long focal length lens 32 is mounted on the camera body A, as shown in FIG. 9, the drive of the motor 62 is controlled so that the prism 56 faces the distance measuring zones 28 and 29, and at that position, The rotation of the rotating member 57 is stopped.
これによって、周辺部測距用のオートフォーカス光学
系18、19のセパレータレンズ20、21、23、24が撮影レン
ズ１のの射出瞳を覗く角度が自動的に変更される。As a result, the angle at which the separator lenses 20, 21, 23, 24 of the autofocus optical systems 18, 19 for peripheral distance measurement look into the exit pupil of the photographing lens 1 is automatically changed.
すなわち、たとえば、短焦点レンズ33を有するレンズ
マウントＢをカメラ本体Ａから取り外して長焦点レンズ
32を有するレンズマウントＢをカメラ本体Ａに装着する
と、光学部材51が仮想中心Ｚ（第２図参照）を中心に回
転されて、プリズム56が測距ゾーン28、29に臨む位置で
停止される。これによって、セパレータレンズ20、21、
23、24が撮影レンズ１の射出瞳を覗く角度が自動的にθ
からθ′に変更される。なお、プリズム55を測距ゾーン
28、29に臨ませると、セパレータレンズ20、21、23、24
が撮影レンズ１の射出瞳を覗く角度がθ、θ′以外の角
度に変更され、他の焦点を有する撮影レンズに適合させ
ることができる。That is, for example, by removing the lens mount B having the short focus lens 33 from the camera body A,
When the lens mount B having 32 is mounted on the camera body A, the optical member 51 is rotated about the virtual center Z (see FIG. 2), and the prism 56 is stopped at a position facing the distance measuring zones 28 and 29. . This allows the separator lenses 20, 21,
The angle at which 23 and 24 look into the exit pupil of the photographing lens 1 is automatically θ.
To θ ′. Note that the prism 55 is
When facing 28 and 29, separator lenses 20, 21, 23 and 24
Is changed to an angle other than [theta] and [theta] 'to look at the exit pupil of the photographing lens 1, and can be adapted to a photographing lens having another focus.
以上、第１実施例においては、マイクロプロセッサ67
がレンズマウントＢに設けられたレンズROM68の情報を
受けてモータ62を駆動制御する構成として説明したが、
レンズROM68の情報がない場合でも、レンズマウントＢ
のカメラ本体Ａへの装着と同時にマイクロプロセッサ67
により回転部材57を連続回転させて、CCD22、25の受光
量が最大となる回転位置をそのマイクロプロセッサ67に
より検出し、その回転位置で回転部材57の回転を停止さ
せ、セパレータレンズ20、21、23、24が撮影レンズ１の
射出瞳を覗く角度を自動的にθからθ′に変更する構成
とすることもできる。As described above, in the first embodiment, the microprocessor 67
Has been described as a configuration in which the information of the lens ROM 68 provided in the lens mount B is received and the drive of the motor 62 is controlled.
Even if there is no lens ROM 68 information, the lens mount B
Microprocessor 67 at the same time as
By continuously rotating the rotating member 57, the rotation position at which the amount of light received by the CCD 22, 25 is detected by the microprocessor 67, the rotation of the rotating member 57 is stopped at the rotation position, the separator lenses 20, 21, It is also possible to adopt a configuration in which the angle at which the lenses 23 and 24 look into the exit pupil of the photographing lens 1 is automatically changed from θ to θ ′.
次に、第15図〜第17図を参照しつつ本発明に係るカメ
ラの自動焦点検出装置の第２実施例を説明する。Next, a second embodiment of the automatic focus detection device for a camera according to the present invention will be described with reference to FIGS.
この第２実施例は、角度変更手段の他の例を示し、機
械的手段によって撮影レンズ１の光軸ｌとオートフォー
カス光学系18、19の光軸l1,l2との為す角θを異ならせ
る（変更させる）構成としたものであり、第15図におい
て、カメラ本体Ａの所定位置には保持ケース142が固定
され、保持ゲート142の両側には保持ケース143,144が配
置されていて、この保持ケース142内には上述のオート
フォーカス光学系９が収納され、保持ケース143,144内
にはユニット化されたオートフォーカス光学系18,19が
それぞれ収納されている。This second embodiment shows another example of the angle changing means. The angle θ between the optical axis l of the taking lens 1 and the optical axes l 1 and l 2 of the autofocus optical systems 18 and 19 is shown by mechanical means. In FIG. 15, a holding case 142 is fixed at a predetermined position of the camera body A, and holding cases 143 and 144 are disposed on both sides of the holding gate 142. The autofocus optical system 9 described above is housed in the holding case 142, and the unitized autofocus optical systems 18 and 19 are housed in the holding cases 143 and 144, respectively.
角度変更手段は光軸角度自動変更手段141により構成
され、光軸角度自動変更手段141は、保持ケース143の図
中上下面に同軸に固定した一対の支軸145,146と、保持
ケース144の図中上下に同軸に固定した一対の支軸147,1
48を有する。この支軸145,146及び147,148は、カメラ本
体Ａの図示を略す支持板にフィルム等価面10と平行に且
つ第15図中左右動自在に保持されていると共に、軸線回
りに回動可能に設けられている。これにより、保持ケー
ス143,144は、保持ケース142に対して進退動できると共
に、支軸145,146及び147,148を中心に矢印149,150の如
く回動できるようになっている。The angle changing means is constituted by an automatic optical axis angle changing means 141, and the automatic optical axis angle changing means 141 includes a pair of support shafts 145 and 146 coaxially fixed to the upper and lower surfaces of the holding case 143 in the drawing, and the holding case 144 in the drawing. A pair of spindles 147,1 fixed vertically and coaxially
Has 48. The support shafts 145, 146 and 147, 148 are held on a support plate (not shown) of the camera main body A in parallel to the film equivalent surface 10 and movably to the left and right in FIG. 15, and are provided so as to be rotatable around the axis. I have. Thus, the holding cases 143, 144 can move forward and backward with respect to the holding case 142, and can rotate around the support shafts 145, 146 and 147, 148 as indicated by arrows 149, 150.
しかも、光軸角度自動変更手段141は、撮影レンズの
レンズマウントＢをカメラ本体Ａに装着したときに、撮
影レンズ１のレンズマウントＢに設けた係合孔（係合
部）152に係合して、支軸146,148を撮影レンズ１の焦点
距離に応じて回動させ、周辺部測距用のオートフォーカ
ス光学系18,19及びその測距ゾーン28,29の光軸l1,l2を
撮影レンズ１の射出瞳の中心に向けさせる機械的駆動手
段153（機械的連動手段）が設けられている。In addition, when the lens mount B of the taking lens is attached to the camera body A, the optical axis angle automatic changing means 141 engages with the engaging hole (engaging portion) 152 provided in the lens mount B of the taking lens 1. Then, the support shafts 146 and 148 are rotated according to the focal length of the photographing lens 1 to photograph the optical axes l 1 and l 2 of the autofocus optical systems 18 and 19 for measuring the distance to the peripheral area and the measuring zones 28 and 29 thereof. Mechanical driving means 153 (mechanical interlocking means) for directing the lens 1 toward the center of the exit pupil is provided.
この機械的駆動手段153は、支軸146,148の下端部に一
端部が固定されたリンク154,155と、リング154,155の他
端部同士を回動自在に連結している支軸156を有する。
この支軸156は、光軸ｌと軸線が直交させられていると
共に、矢印156aの方向すなわち光軸ｌ方向に後退動自在
にカメラ本体Ａに保持されている。また、機械的駆動手
段153は、支軸156に一端部が回動自在に保持された駆動
リンク157と、駆動リンク157の他端部に突設され且つカ
メラ本体Ａのレンズマウント部Ｂから外方に突出させら
れた係合ピン158と、駆動リンク157を支軸156側とは反
対方向すなわち係合ピン158がカメラ本体Ａのレンズマ
ウント部Ｂから外方に突出する方向に付勢しているバネ
159を有する。This mechanical drive means 153 has links 154 and 155, one ends of which are fixed to lower ends of the support shafts 146 and 148, and a support shaft 156 that rotatably connects the other ends of the rings 154 and 155.
The support shaft 156 has its axis perpendicular to the optical axis l and is held by the camera body A so as to be able to retreat in the direction of arrow 156a, that is, in the direction of the optical axis l. Further, the mechanical drive means 153 includes a drive link 157 whose one end is rotatably held on a support shaft 156, and a mechanical drive means 153 protrudingly provided at the other end of the drive link 157, and is provided outside the lens mount B of the camera body A. And the drive link 157 is urged in a direction opposite to the support shaft 156 side, that is, in a direction in which the engagement pin 158 projects outward from the lens mount portion B of the camera body A. Spring
159.
この係合ピン158は、撮影レンズ１のレンズマウント
Ｂをカメラ本体Ａに装着したときに、係合孔152に挿入
させられて、その先端が係合孔152の底部にバネ159で当
接させられる様になっている。しかも、この係合ピン15
8は光軸ｌと平行に進退動する様に設けられている。ま
た、この係合ピン158が係合する係合孔（係合部）152の
深さＤは、撮影レンズ１の焦点距離が短いほど浅く設定
されていると共に、撮影レンズ１のレンズマウントＢを
カメラ本体Ａに装着して係合ピン158を係合孔152に挿入
したときに、機械的駆動手段153を介して周辺部測距用
のオートフォーカス光学系18,19及びその測距ゾーン28,
29の光軸l1,l2を撮影レンズ１の射出瞳の中心に向けさ
せる深さに設定されている。第16図（イ）は撮影レンズ
１が長焦点の場合の係合孔152の深さＤの一例を示し、
第16図（ロ）は撮影レンズ１が短焦点の場合の係合孔15
2の深さＤの一例を示したものである。The engagement pin 158 is inserted into the engagement hole 152 when the lens mount B of the photographing lens 1 is mounted on the camera body A, and the tip thereof is brought into contact with the bottom of the engagement hole 152 by a spring 159. It is like being able to. Moreover, this engagement pin 15
Reference numeral 8 is provided so as to advance and retreat in parallel with the optical axis l. The depth D of the engaging hole (engaging portion) 152 with which the engaging pin 158 engages is set to be shallower as the focal length of the photographing lens 1 is shorter, and the lens mount B of the photographing lens 1 is When attached to the camera body A and the engagement pin 158 is inserted into the engagement hole 152, the autofocus optical systems 18, 19 for peripheral distance measurement and the distance measurement zones 28,
The depth is set so that the 29 optical axes l 1 and l 2 are directed toward the center of the exit pupil of the photographing lens 1. FIG. 16 (a) shows an example of the depth D of the engagement hole 152 when the taking lens 1 has a long focus,
FIG. 16 (b) shows the engagement hole 15 when the photographing lens 1 has a short focus.
2 shows an example of a depth D of 2.
従って、撮影レンズのレンズマウントＢをカメラ本体
Ａに装着すると、係合ピン158が係合孔152に係合して、
係合ピン158のカメラ本体外への突出量は係合孔152によ
り撮影レンズ１の焦点距離に応じて変化させられ、この
駆動リンク157が光軸ｌ方向に進退動させられる。これ
により、リンク154,155が支軸146,148の軸線回りに回動
させられて、保持ケース143,144が支軸146,148回りに回
動させられると共に、支軸146,148が相対接近又は相対
離反させられて、保持ケース143,144の回動端部すなわ
ち測距ゾーン28,29が設けられた側が接近離反させられ
て、周辺部測距用のオートフォーカス光学系18,19及び
その測距ゾーン28,29の光軸l1,l2を撮影レンズの射出瞳
の中心に自動的に向けられる。Therefore, when the lens mount B of the photographing lens is mounted on the camera body A, the engagement pin 158 is engaged with the engagement hole 152,
The amount of protrusion of the engagement pin 158 out of the camera body is changed by the engagement hole 152 in accordance with the focal length of the photographing lens 1, and the drive link 157 is moved forward and backward in the direction of the optical axis l. Accordingly, the links 154, 155 are rotated around the axis of the support shafts 146, 148, and the holding cases 143, 144 are rotated about the support shafts 146, 148, and the support shafts 146, 148 are relatively approached or separated from each other, and the holding cases 143, 144 The rotating end, that is, the side where the distance measurement zones 28 and 29 are provided is moved toward and away from each other, and the autofocus optical systems 18 and 19 for peripheral distance measurement and the optical axis l 1 of the distance measurement zones 28 and 29 are used. automatically directed to l 2 in the center of the exit pupil of the taking lens.
発明の効果 本発明に係るカメラの自動焦点検出装置は、以上説明
したように、中央部オートフォーカス光学系および周辺
部オートフォーカス光学系からなるオートフォーカス光
学系を有するので、所望の被写体が画面の中央にない撮
影写真を得たい場合に面倒な撮影手順を踏まなくとも迅
速に撮影できるという効果を奏する。また、このように
構成した場合に、レンズのカメラ本体への装着に応じて
自動的に周辺部の測距用のオートフォーカス光学系の採
り込む光束の向きが撮影レンズの射出瞳の方向に向かう
ように調整・設定を行なうことができるようにしてある
から、ビネッティングの影響を自動的に除去できるとい
う効果も奏する。また、この角度調整は、カメラ本体の
規格化に支障を生じることもない。Effect of the Invention As described above, the automatic focus detection device for a camera according to the present invention has the autofocus optical system including the central autofocus optical system and the peripheral autofocus optical system. This is advantageous in that when a photograph that is not located in the center is desired to be taken, the photograph can be taken quickly without having to take a troublesome photographing procedure. In addition, in the case of such a configuration, the direction of the light beam taken in by the autofocus optical system for distance measurement in the peripheral portion is automatically directed to the direction of the exit pupil of the photographing lens in accordance with the attachment of the lens to the camera body. Since the adjustment and setting can be performed as described above, the effect of automatically removing the effect of vignetting is also achieved. This angle adjustment does not hinder the standardization of the camera body.
第１図は本発明に係るカメラの全体構成を示す概略図、
第２図は第１図に示す回転部材と光学部材を拡大して示
す平面図、第３図はその回転部材を拡大して示す側面
図、第４図は第３図に示す回転部材の縦断面図、第５図
〜第７図は第２図に示すプリズム部の形状を説明するた
めの断面図、第８図、第９図は本発明に係る一眼レフカ
メラの自動焦点検出装置の第１実施例の作用を説明する
ための説明図、第10図は本発明に係るカメラの自動焦点
検出装置のオートフォーカス光学系の配置状態を模式的
に示す斜視図、第11図はその自動焦点検出装置のファイ
ンダーの平面図、第12図はそのカメラの撮影レンズをフ
ァインダーの中央測距ゾーンと光学的に略共役なオート
フォーカス光学系の測距ゾーンから覗いた射出瞳と開口
領域との関係を説明するための説明図、第13図は第10図
に示す射出瞳がビネッテイングを受けた場合にその射出
瞳と開口領域との関係を説明するための説明図、第14図
は短焦点レンズと長焦点レンズとの関係を説明するため
の模式図、第15図は本発明に係るカメラの自動焦点検出
装置の第２実施例を説明するための説明図であって光軸
角自動変更手段の概略説明図、第16図は第15図に示す係
合孔と係合ピンとの関係を示す説明図、第17図はその撮
影レンズが長焦点レンズであるか短焦点レンズであるか
によって周辺部測距用のオートフォーカス光学系の中心
光軸と撮影レンズの光軸とが変化する様子を説明するた
めの図、第18図は従来のカメラの自動焦点検出装置の光
学系の模式図、第19図は第18図に示すオートフォーカス
光学系の配置状態を概略的に示す斜視図、第20図はその
自動焦点検出装置により合焦を説明するための説明図、
第21図はその自動焦点検出装置のCCDの検出出力の説明
図、第22図は従来の測距ゾーンのファインダーへの配置
状態を説明するための説明図、第23図はその従来の自動
焦点検出装置を用いて所望の被写体が中央から左右にず
れた撮影写真を得る場合の撮影手順を説明するための説
明図である。 １……撮影レンズ、２……被写体 ９……オートフォーカス光学系 13……射出瞳、16……ファインダー 17……中央測距ゾーン 18、19……周辺部測距用のオートフォーカス光学系 26、27……周辺部測距ゾーン、28、29……測距ゾーン 32……長焦点レンズ、33……短焦点レンズ 34……長焦点レンズの射出瞳、 50……フォーカスユニット、51……光学部材 52……中央等厚透明部、53……プリズム部 57……回転部材、62……モータ 67……マイクロプロセッサ、68……レンズROM Ａ……カメラ本体、Ｂ……レンズマウント 152……係合孔（係合部） 153……機械的駆動手段（機械的連動手段） 158……係合ピンFIG. 1 is a schematic diagram showing the overall configuration of a camera according to the present invention,
2 is an enlarged plan view showing the rotating member and the optical member shown in FIG. 1, FIG. 3 is a side view showing the rotating member in an enlarged manner, and FIG. 4 is a longitudinal section of the rotating member shown in FIG. 5 to 7 are cross-sectional views for explaining the shape of the prism portion shown in FIG. 2, and FIGS. 8 and 9 are diagrams of an automatic focus detection device for a single-lens reflex camera according to the present invention. FIG. 10 is an explanatory view for explaining the operation of one embodiment, FIG. 10 is a perspective view schematically showing the arrangement of an autofocus optical system of an automatic focus detection device for a camera according to the present invention, and FIG. Fig. 12 is a plan view of the viewfinder of the detection device, and Fig. 12 shows the relationship between the exit pupil and the aperture area when the photographing lens of the camera is viewed from the rangefinder zone of the autofocus optical system that is substantially conjugate to the center rangefinder zone of the viewfinder FIG. 13 is an explanatory diagram for explaining the structure of FIG. FIG. 14 is an explanatory diagram for explaining the relationship between the exit pupil and the aperture region when the lens has been subjected to inching, FIG. 14 is a schematic diagram for explaining the relationship between the short focus lens and the long focus lens, and FIG. FIG. 15 is an explanatory view for explaining a second embodiment of the automatic focus detection device for a camera according to the present invention, and is a schematic explanatory view of an automatic optical axis angle changing means, and FIG. FIG. 17 is an explanatory view showing the relationship with the pin, and FIG. 17 shows the center optical axis of the autofocus optical system for peripheral distance measurement and the optical axis of the photographing lens depending on whether the photographing lens is a long focus lens or a short focus lens. FIG. 18 is a schematic diagram of an optical system of a conventional automatic focus detection device of a camera, and FIG. 19 schematically illustrates an arrangement state of an autofocus optical system illustrated in FIG. FIG. 20 is a perspective view for explaining focusing by the automatic focus detection device. Figure,
FIG. 21 is a view for explaining the detection output of the CCD of the automatic focus detection device, FIG. 22 is a view for explaining the arrangement of a conventional ranging zone in a finder, and FIG. 23 is a view for explaining the conventional automatic focus detection. FIG. 11 is an explanatory diagram for describing a shooting procedure when a desired subject is obtained by using the detection device to obtain a shot photograph in which a desired subject is shifted left and right from the center. 1 photographic lens, 2 subject 9 autofocus optical system 13 exit pupil 16 finder 17 center ranging zone 18, 19 autofocus optical system for peripheral ranging 26 , 27… Peripheral distance measurement zone, 28, 29… Distance measurement zone 32… Long focus lens, 33… Short focus lens 34… Exit pupil of long focus lens, 50… Focus unit, 51… Optical member 52: Transparent part of equal thickness in the center, 53: Prism part 57: Rotating member, 62: Motor 67: Microprocessor, 68: Lens ROM A: Camera body, B: Lens mount 152 … Engaging holes (engaging portions) 153… mechanical driving means (mechanical interlocking means) 158… engaging pins
Claims (5)
の一部を導いて、前記カメラのファインダー視野内に設
けられた前記ファインダーの視野略中央のゾーンと光学
的に略共役な位置における前記光束合の焦点状態を検出
する中央部オートフォーカス光学系および前記ファンダ
ー視野の略中央のゾーンとは異なる位置の所定ゾーンと
光学的に略共役な位置における前記光束の焦点状態を検
出する周辺部オートフォーカス光学系からなるオートフ
ォーカス光学系を有する自動焦点検出装置において、 前記周辺部オートフォーカス光学系が採り込む光束の向
きが前記撮影レンズの射出瞳の方向に向かうように角度
変更可能な角度変更手段を有することを特徴とするカメ
ラの自動焦点検出装置。1. A camera according to claim 1, wherein a part of a light beam incident through a photographing lens of the camera is guided to a position substantially optically conjugate with a substantially central zone of the viewfinder provided in the viewfinder of the camera. A central part autofocus optical system for detecting the focus state of the light flux and a peripheral part for detecting the focus state of the light flux at a position substantially optically conjugate with a predetermined zone at a position different from the substantially central zone of the funder field of view. In an automatic focus detection device having an autofocus optical system including an autofocus optical system, an angle change capable of changing an angle so that a direction of a light beam taken in by the peripheral autofocus optical system is directed to a direction of an exit pupil of the photographing lens. An automatic focus detection device for a camera, comprising:
体への装着時に前記撮像レンズの鏡筒に設けた係合部と
この係合部により作動させられる機械的連動手段によっ
て構成されていることを特徴とする請求項１に記載のカ
メラの自動焦点検出装置。2. An image forming apparatus according to claim 1, wherein said angle changing means comprises an engaging portion provided on a barrel of said imaging lens when said taking lens is mounted on a camera body, and mechanical interlocking means operated by said engaging portion. The automatic focus detection device for a camera according to claim 1, wherein:
光軸は、前記撮影レンズのカメラ本体への装着時に、前
記撮影レンズの鏡筒に設けた係合部とこの係合部により
作動させられる機械的連動手段とにより略前記撮影レン
ズの射出瞳の中心方向を向くように設定されていること
を特徴とする請求項１に記載のカメラの自動焦点検出装
置。3. A central optical axis of the peripheral autofocus optical system is actuated by an engaging portion provided on a barrel of the photographing lens and the engaging portion when the photographing lens is mounted on a camera body. 2. The automatic focus detection device for a camera according to claim 1, wherein the automatic focus detection device is set so as to be directed substantially toward a center of an exit pupil of the photographing lens by a mechanical interlocking unit.
らに撮影レンズの情報を入力し、その入力情報に基づい
て前記角度変更手段を制御する制御手段を有することを
特徴とする自動焦点検出装置。4. The automatic focus detecting device according to claim 1, further comprising control means for inputting information of a photographing lens and controlling said angle changing means based on the input information. .
学系を構成するフォーカスユニットの前面に設けられた
光透過性回転盤によって形成されていることを特徴とす
る請求項４に記載のカメラの自動焦点検出装置。5. An automatic camera according to claim 4, wherein said angle changing means is formed by a light-transmitting rotating disk provided on a front surface of a focus unit constituting each autofocus optical system. Focus detection device.
Applications Claiming Priority (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2256187 | 1987-02-04 | ||
| JP62-22561 | 1987-02-04 | ||
| JP29375187 | 1987-11-20 | ||
| JP62-293751 | 1987-11-20 | ||
| JP30674687 | 1987-12-03 | ||
| JP62-306746 | 1987-12-03 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH024A JPH024A (en) | 1990-01-05 |
| JP2666142B2 true JP2666142B2 (en) | 1997-10-22 |
Family
ID=27283891
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63023158A Expired - Fee Related JP2666142B2 (en) | 1987-02-04 | 1988-02-03 | Automatic focus detection device for camera |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2666142B2 (en) |
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| US9512751B2 (en) | 2014-09-22 | 2016-12-06 | Hyundai Motor Company | Device and method for reducing fuel dilution of diesel engine |
| JP6195031B1 (en) | 2016-10-24 | 2017-09-13 | 三菱電機株式会社 | High frequency amplifier |
| JP6763327B2 (en) | 2017-03-16 | 2020-09-30 | トヨタ自動車株式会社 | Collision avoidance device |
| KR102165967B1 (en) | 2017-11-17 | 2020-10-15 | 미쓰비시덴키 가부시키가이샤 | 3D space monitoring device, 3D space monitoring method, and 3D space monitoring program |
| JP7466386B2 (en) | 2020-06-12 | 2024-04-12 | 株式会社デンソー | Optical transmission module and electronic control device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0830779B2 (en) * | 1987-01-12 | 1996-03-27 | ミノルタ株式会社 | Automatic focus detection device |
-
1988
- 1988-02-03 JP JP63023158A patent/JP2666142B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH024A (en) | 1990-01-05 |
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