JP2693452B2 - Multi range finder - Google Patents
Multi range finderInfo
- Publication number
- JP2693452B2 JP2693452B2 JP62238226A JP23822687A JP2693452B2 JP 2693452 B2 JP2693452 B2 JP 2693452B2 JP 62238226 A JP62238226 A JP 62238226A JP 23822687 A JP23822687 A JP 23822687A JP 2693452 B2 JP2693452 B2 JP 2693452B2
- Authority
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- Japan
- Prior art keywords
- light
- light receiving
- light projecting
- projecting
- unit
- 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
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- Measurement Of Optical Distance (AREA)
- Focusing (AREA)
- Automatic Focus Adjustment (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は複数方向の測距を行うカメラの測距装置に関
する。
〔従来の技術〕
従来より複数方向の測距を行うカメラの測距装置とし
て、次のようなものが提案されている。
１）複数個の発光素子又は１個の発光素子を複数方向へ
順次投光し、各方向に対応した複数個の受光素子又は複
数方向からの反射光を受光できる受光素子で測距対象で
の反射光を受光して時系列的に各方向の測距値を算出す
る。
２）複数方向へ同時に投光し、複数方向からの反射光を
受光できる受光素子で受光し、複数方向の平均距離を算
出する。
３）複数方向へ同時に投光し、各方向に対応した受光素
子で受光し、各方向の距離を時系列的に算出する。
４）複数方向へ同時に投光し、各方向に対応した受光素
子で受光し、各受光素子に対して設けられた演算処理回
路で各方向の距離を算出する。
〔発明が解決しようとする問題点〕
しかしながら上記１）〜４）の方法に対してそれぞれ
１）複数方向の各方向の測距結果は全て独立情報として
得られるが、投光と演算処理に時間がかかる。
２）測距に必要な時間は短時間だが、各方向の測距結果
を独立情報として得られないため従来測距できた対象物
（特に撮影画面中央部）についての測距値が得られな
い。
３）複数方向のそれぞれ独立した測距情報が得られる
が、演算処理に時間を要する。
４）測距時間は短時間で、複数方向のそれぞれ独立した
測距情報が得られるが、演算回路の個数が増えコスト高
になるとともに、スペースを必要とする。
のような問題点があった。
本発明は上述のような問題点に着目してなされたもの
で、短時間で複数方向の測距を行うことができるととも
に、ある設定された方向についての測距値を独立情報と
して得ることができるカメラの測距装置を提供すること
を目的とする。
［問題点を解決する為の手段］
上記目的を達成するために本発明では、撮影画面内の
複数の領域をそれぞれ測距可能なマルチ測距装置に、撮
影画面に対応した被写界の中央部へ光を投光する第１投
光手段（11）と、被写界の中央部に対して基線長方向に
ズレた異なる領域へ光を投光する第２投光手段（10、1
2）と、第１投光手段の投光に基づく中央部からの反射
光を受光する第１受光部（9a）と、第２投光手段の投光
に基づく異なる領域からの反射光を受光する第２受光部
（9b,9c）とを備えた受光手段とを構成し、第１受光部
と第２受光部とを並行配置し且つ基線長方向にずらして
配置した。
［作用］
本発明では、複数（別個）の受光部を用いて、異なる
方向からの光束を別個の受光部で受光するようにしたの
で、受光部の中心部分と周辺部分とで素子の特性が異な
る場合が多い単一の受光部を使用する測距装置と比べ
て、測距精度を向上させることができる。
また本発明では、複数の受光部を並行配置し、且つ該
複数の受光部を基線長方向にずらして配置したので、第
１投光手段に投光される領域に存在する被写体と、第２
投光手段に投光される領域に存在する被写体とが同一距
離である場合には、それぞれ対応する受光部から出力さ
れる出力比も中央部と周辺部とで等しくなる。このた
め、測距演算時に各受光部からの出力に補正を加えて調
節する必要が無く、演算方法が簡略化できる。
［実施例］
以下本発明を図を用いて説明する。
まず本発明で用いる測距装置を第１図および第２図を
用いて説明する。
第１図、第２図に示すように、撮影画面に対応する被
写界２内の中央部３と左斜め下の4aおよび右斜め下の4b
の３方向を測距する場合、各方向に対応した投光素子
（不図示）より投光レンズ１を通して測距方向３、4a、
4bそれぞれに投光光束５、６、７が投光される。投光光
束５、６、７が被写体（不図示）で反射された反射光束
５′、６′、７′は投光レンズ１と基線長Ｄ隔てて設け
られた受光レンズ８を通り第２図に示すように受光素子
９へ入射する。反射光束５′、６′、７′は各方向にあ
る被写体の距離によって受光素子９上を紙面で上下方向
に移動する。本実施例では被写体の距離が遠ければ紙面
上方、近距離であれば紙面下方へ反射光が入射する。
また第２図の受光素子９上における反射光束５′、
６′、７′の入射位置３′、4a′、4b′（破線図示）
は、被写界２中で同一距離にある被写体で反射した場合
を示している。投光光束５と投光光束６、７とがもとも
と上下方向にずれた状態で投光されているので、同一距
離にある被写体から来た反射光束でも受光素子９上で上
下方向に間隔Δｄだけずれている。
そして、各方向の被写体の距離は、受光素子９をPSD
（Position Sensing Device）とすれば受光素子９の両
出力端子20、21からそれぞれ発生する電流I1、I2の比を
後述の演算手段で算出することにより得る。
次に第３図を用いて本発明の実施例を説明する。
上記撮影画面に対応する被写界２内の中央部３へ向け
て投光光束５を投光するための投光素子を第３図に示す
投光素子11とし、左斜め下4aと右斜め下4b（以後4aと4b
とを周辺部4aおよび4bと称す）のそれぞれに向けて投光
光束６および７を投光するための投光素子を10および12
とする。
投光素子10、11、12は投光素子を切換えて駆動するた
めの投光切換手段13に接続され、投光切換手段13は制御
手段14によって中央部３への投光と周辺部4a、4bへの投
光とを切換える。
本実施例では、まず制御手段14によって投光切換手段
13は投光素子11から撮影画面に対応する被写界の中央部
３へ投光光束５を投光させる。投光光束５の被写体での
反射光５′が受光素子９へ入射し、受光素子９の出力電
流が電流−電圧変換手段15で電圧に変換された後、演算
手段16で中央部３に存する被写体までの距離が算出さ
れ、撮影距離設定手段17に送られ、そこで記憶される。
次に制御手段14によって投光切換手段13は投光素子10
および12から周辺部4aと4bに向けて投光光束６、７を投
光させる。周辺部4aおよび4bからの反射光束６′および
７′は受光素子９へ入射し、電流−電圧変換手段15を経
て演算手段16で周辺部4a、4bにそれぞれ存する被写体の
平均的距離が算出され、撮影距離設定手段17に送られ
る。撮影距離設定手段17は、先に記憶した中央部３に存
する被写体の距離値と、今入力された周辺部4a、4bの平
均的距離値とを演算して、撮影距離を設定する。
ここで、本発明の実施例に用いている受光素子９を第
４図（ｄ）に示す。なお第４図（ａ）〜（ｃ）は参考的
に示した受光素子の例である。
（ａ）は単一の受光面で３方向からの反射光束５′、
６′、７′を受光するもので、第２図で示した受光素子
９と同一である。
（ｂ）〜（ｄ）は３方向からの反射光束５′、６′、
７′をそれぞれ別々の受光素子9a〜9cで受光するもので
ある。
（ｂ）は各素子の間隔が比較的広い場合で、反射光の
ビーム径が大きくても隣接する素子にその反射光が入射
することが防止される。
（ｃ）は（ｂ）に比べて間隔が狭く、受光素子全体の
小型化が図れるものである。
（ｄ）は第１図に示すように投光方向を設定した時、
反射光束５′、６′、７′では受光素子９上での入射範
囲が異なり第２図のようになるため、受光素子面の長さ
をそれぞれの光束の入射範囲とほぼ等しくなるように設
定すると共に、中央部測距用の受光素子9aと、周辺部測
距用の受光素子9b、9cとを、第２図に示した間隔Δｄだ
け上下方向にずらしたものである。
尚、（ｂ）〜（ｄ）のように各反射光束に対応した受
光素子9a、9b、9cを別個に設けたのは、第４図（ａ）の
ように単一の受光面で３方向の反射光が入射できる面積
が大きい受光素子を用いた場合、受光部の中心部分と周
辺部分とで素子の特性が異なることが多く、測距精度が
低くなるおそれがある為である。
また、第４図（ｂ）〜（ｄ）の各受光素子9a〜9cの両
出力端子は、出力端20および21でそれぞれ一本にまとめ
られている。したがって仮想的に（ａ）の受光素子９と
同等に考えられる。
次に、第４図（ｄ）の受光素子９を用いた本実施例の
動作を説明する。前述のように初めに投光素子11から中
央部３へ向けて投光光束５が投光され、被写体での反射
光５′が受光素子９の9aに入射して、入射位置に対応し
た信号が信号線20および21に出力される。この出力に基
づいて中央部３の被写体距離が算出され、撮影距離設定
手段17に送られ、そこで記憶される。
次に投光素子10と12から周辺部4aおよび4bへ向けて投
光光束６および７が同時に投光され、投光光束６の反射
光６′は受光部9cへ入射し、投光光束７の反射光７′は
受光部9bへ入射する。そして受光素子9b、9cからの出力
信号は合成されて信号線20および21に出力される。した
がって、周辺部4aおよび4bの測距値は、演算手段で平均
値として算出される。
中央部３の測距値と周辺部4aおよび4bの平均測距値が
算出されると撮影距離設定手段17で中央部３の測距値と
周辺部4a、4bの平均測距値とに基づいて撮影距離が設定
されレンズ位置を決定するための距離情報として出力さ
れる。ここで撮影距離設定手段17は、
１）中央部測距値と周辺部平均測距値の近い方を選択
２）中央部測距値と周辺部平均測距値の近い方を前側被
写界深度内に含む距離とする
等の公知の方法によって撮影距離を設定するものとす
る。
第４図（ｄ）に示した中央部用の受光素子9aと、周辺
部用の受光素子9b、9cとは、前記間隔Δｄだけ上下にず
らして配置されているので、被写体がそれぞれ同一距離
にあり中央の反射光束５′と左右の反射光束６′、７′
とが第２図の破線で示すように前記間隔Δｄだけ上下に
ずれて入射されても、出力端20および21から発生する出
力の比は中央部の測距時と周辺部の測距時とでそれぞれ
等しくなる。
一方、参考までに第４図（ａ）〜（ｃ）に示した各受
光素子では前記間隔Δｄだけ上下にずらすことを行って
いないので、同一距離の被写体から返ってきた各反射光
束によって、出力端20、21から順次発生する出力の比は
中央部の測距時と周辺部の測距時とで該間隔Δｄに相当
する量だけずれている。そのため、第４図（ａ）〜
（ｃ）の受光素子を採用する場合は、演算手段16におい
て中央部の測距出力と周辺部の測距出力のどちらか少な
くとも一方に補正を加えて、同一距離の被写体に対する
測距値はそれぞれ等しくなるようにする必要がある。そ
のためには例えば、投光切換手段13による中央部３への
投光と周辺部4a、4bへの投光との切換に伴って、制御手
段14から信号を演算手段16に発し、演算手段16がこれを
受けて、周辺部の測距値に間隔Δｄに相当する補正を加
えるようにすれば良い。
以上本発明の一実施例について述べてきたが，測距す
る方向は３方向とは限られるものではなく中央部３と複
数の周辺部であっても良いことは言うまでもない。また
受光素子９をPSD（半導体位置検出素子）としたが、こ
れに限定されるものではない。
さらに、測距する順序は中央部が先で周辺部が後でも
周辺部が先で中央部が後で行なわれても良い。
［発明の効果］
本発明では、複数（別個）の受光部を用いて、異なる
方向からの光束を別個の受光部で受光するようにしたの
で、受光部の中心部分と周辺部分とで素子の特性が異な
る場合が多い単一の受光部を使用する測距装置と比べ
て、測距精度を向上させることができる。
また本発明では、複数の受光部を並行配置し、且つ該
複数の受光部を基線長方向にずらして配置したので、第
１投光手段に投光される領域に存在する被写体と、第２
投光手段に投光される領域に存在する被写体とが同一距
離である場合には、それぞれ対応する受光部から出力さ
れる出力比も中央部と周辺部とで等しくなる。このた
め、測距演算時に各受光部からの出力に補正を加えて調
節する必要が無く、演算方法が簡略化できる。The present invention relates to a distance measuring device for a camera that measures distances in a plurality of directions. [Prior Art] Conventionally, the following device has been proposed as a distance measuring device for a camera that performs distance measurement in a plurality of directions. 1) A plurality of light emitting elements or one light emitting element is sequentially projected in a plurality of directions, and a plurality of light receiving elements corresponding to each direction or a light receiving element capable of receiving reflected light from a plurality of directions are used for distance measurement. The reflected light is received and the distance measurement value in each direction is calculated in time series. 2) Light is projected in a plurality of directions at the same time, and reflected light from a plurality of directions is received by a light receiving element, and an average distance in a plurality of directions is calculated. 3) Light is simultaneously projected in a plurality of directions, and light is received by a light receiving element corresponding to each direction, and the distance in each direction is calculated in time series. 4) Light is projected in a plurality of directions at the same time, and light is received by a light receiving element corresponding to each direction, and a distance in each direction is calculated by an arithmetic processing circuit provided for each light receiving element. [Problems to be Solved by the Invention] However, with respect to the above methods 1) to 4), 1) the distance measurement results in each of a plurality of directions are all obtained as independent information. Takes. 2) The time required for distance measurement is short, but since the distance measurement result in each direction cannot be obtained as independent information, the distance measurement value for the target object (especially the central part of the shooting screen) that could be conventionally measured cannot be obtained. . 3) Independent distance measurement information can be obtained in each of a plurality of directions, but it takes time to perform arithmetic processing. 4) The distance measurement time is short and independent distance measurement information in a plurality of directions can be obtained, but the number of arithmetic circuits increases and the cost increases, and a space is required. There was such a problem. The present invention has been made in view of the above-mentioned problems, and it is possible to perform distance measurement in a plurality of directions in a short time and obtain distance measurement values in a certain set direction as independent information. An object of the present invention is to provide a distance measuring device for a camera. [Means for Solving Problems] In order to achieve the above object, according to the present invention, a multi-rangefinder capable of measuring a plurality of regions in a shooting screen is provided in the center of a field corresponding to the shooting screen. First light projecting means (11) for projecting light to a central part and second light projecting means (10, 1) for projecting light to different regions deviated from the center of the field in the direction of the base line.
2), a first light receiving portion (9a) for receiving the reflected light from the central portion based on the light projected by the first light projecting means, and a reflected light from a different area based on the light projected by the second light projecting means And a second light receiving section (9b, 9c), and the first light receiving section and the second light receiving section are arranged in parallel with each other and shifted in the base length direction. [Operation] In the present invention, since a plurality of (separate) light receiving portions are used to receive light fluxes from different directions by the different light receiving portions, the characteristics of the element are different between the central portion and the peripheral portion of the light receiving portion. The ranging accuracy can be improved as compared with a ranging device using a single light receiving unit which is often different. Further, in the present invention, since the plurality of light receiving portions are arranged in parallel and the plurality of light receiving portions are arranged so as to be shifted in the base line length direction, the object existing in the area projected by the first light projecting means and the second
When the subject existing in the area projected by the light projecting means is at the same distance, the output ratios output from the corresponding light receiving parts are also equal in the central part and the peripheral part. Therefore, it is not necessary to correct and adjust the output from each light receiving unit during the distance measurement calculation, and the calculation method can be simplified. EXAMPLES The present invention will be described below with reference to the drawings. First, the distance measuring device used in the present invention will be described with reference to FIGS. 1 and 2. As shown in FIG. 1 and FIG. 2, the central portion 3 in the field 2 corresponding to the shooting screen, 4a at the lower left and 4b at the lower right
When measuring the distances in three directions, the distance measuring directions 3, 4a, through the light projecting lens 1 from a light projecting element (not shown) corresponding to each direction.
The projected light beams 5, 6, and 7 are projected on each of 4b. The reflected light beams 5 ', 6', 7'in which the projected light beams 5, 6, 7 are reflected by the subject (not shown) pass through the light receiving lens 8 provided at a distance of the base line D from the light projecting lens 1 and FIG. As shown in FIG. The reflected light beams 5 ', 6', 7'move vertically on the light receiving element 9 on the paper surface depending on the distance of the subject in each direction. In this embodiment, the reflected light is incident on the upper side of the paper when the distance of the subject is long, and on the lower side of the paper when the distance is short. Also, the reflected light beam 5'on the light receiving element 9 in FIG.
6 ', 7'incident positions 3', 4a ', 4b' (shown by broken lines)
Shows the case where the object is reflected at the same distance in the object scene 2. Since the projected light beam 5 and the projected light beams 6 and 7 are originally projected in a state where they are vertically displaced from each other, even a reflected light beam from an object at the same distance is vertically separated by a distance Δd on the light receiving element 9. Deviated. Then, the distance of the subject in each direction can be determined by setting the light receiving element 9 to PSD.
If it is (Position Sensing Device), it can be obtained by calculating the ratio of the currents I 1 and I 2 generated from both output terminals 20 and 21 of the light receiving element 9 by the calculating means described later. Next, an embodiment of the present invention will be described with reference to FIG. The light projecting element for projecting the light projecting light beam 5 toward the central portion 3 in the object field 2 corresponding to the above-mentioned photographing screen is a light projecting element 11 shown in FIG. Lower 4b (hereafter 4a and 4b
And 12 are referred to as peripheral portions 4a and 4b) and projecting elements 10 and 12 for projecting the projected luminous fluxes 6 and 7 respectively.
And The light projecting elements 10, 11 and 12 are connected to a light projecting switching means 13 for switching and driving the light projecting elements. The light projecting switching means 13 is controlled by the control means 14 to project light to the central portion 3 and the peripheral portion 4a. Switch between light emission to 4b. In this embodiment, first, the control means 14 is used to switch the light emission switching means.
A light projecting element 13 projects a light projecting light beam 5 from a light projecting element 11 to a central portion 3 of a field corresponding to a photographing screen. Reflected light 5'of the projected light beam 5 on the subject is incident on the light receiving element 9, and the output current of the light receiving element 9 is converted into a voltage by the current-voltage converting means 15, and then is present in the central portion 3 by the calculating means 16. The distance to the subject is calculated, sent to the photographing distance setting means 17, and stored there. Next, the projection switching means 13 is controlled by the control means 14 so that the projection element 10
And 12 to project light beams 6 and 7 toward the peripheral portions 4a and 4b. The reflected light beams 6'and 7'from the peripheral portions 4a and 4b are incident on the light receiving element 9, and the average distance of the subject existing in the peripheral portions 4a and 4b is calculated by the calculating means 16 via the current-voltage converting means 15. , To the photographing distance setting means 17. The photographing distance setting means 17 sets the photographing distance by calculating the previously stored distance value of the subject in the central portion 3 and the average distance value of the peripheral portions 4a and 4b which have been input. Here, the light receiving element 9 used in the embodiment of the present invention is shown in FIG. 4A to 4C are examples of the light receiving element shown for reference. (A) shows a reflected light beam 5'from three directions with a single light receiving surface,
It receives light from 6'and 7 ', and is the same as the light receiving element 9 shown in FIG. (B) to (d) are reflected light beams 5 ', 6'from three directions,
7'are respectively received by separate light receiving elements 9a to 9c. (B) is a case where the distance between the respective elements is relatively wide, and even if the beam diameter of the reflected light is large, the reflected light is prevented from entering the adjacent element. The interval in (c) is narrower than that in (b), and the overall size of the light receiving element can be reduced. (D) is when the projection direction is set as shown in FIG.
Since the incident ranges of the reflected light beams 5 ', 6', 7'on the light receiving element 9 are different as shown in FIG. 2, the length of the light receiving element surface is set to be substantially equal to the incident range of each light beam. At the same time, the central distance measuring light receiving element 9a and the peripheral distance measuring light receiving elements 9b and 9c are vertically shifted by the distance Δd shown in FIG. As shown in FIGS. 4 (a) to 4 (d), the light receiving elements 9a, 9b, and 9c corresponding to the respective reflected light beams are separately provided, as shown in FIG. 4 (a). This is because when a light receiving element having a large area where the reflected light can be incident is used, the characteristics of the element are often different between the central portion and the peripheral portion of the light receiving portion, which may reduce the distance measurement accuracy. Further, both output terminals of the respective light receiving elements 9a to 9c shown in FIGS. 4 (b) to 4 (d) are integrated at output terminals 20 and 21, respectively. Therefore, it can be considered to be virtually equivalent to the light receiving element 9 of (a). Next, the operation of this embodiment using the light receiving element 9 shown in FIG. 4 (d) will be described. As described above, the projection light beam 5 is first projected from the light projecting element 11 toward the central portion 3, and the reflected light 5'from the subject is incident on the light receiving element 9a and the signal corresponding to the incident position. Are output to the signal lines 20 and 21. The subject distance of the central portion 3 is calculated based on this output, sent to the photographing distance setting means 17, and stored there. Next, the projected light beams 6 and 7 are simultaneously projected from the light projecting elements 10 and 12 toward the peripheral portions 4a and 4b, and the reflected light 6'of the projected light beam 6 enters the light receiving portion 9c, and the projected light beam 7 is emitted. The reflected light 7'is incident on the light receiving portion 9b. The output signals from the light receiving elements 9b and 9c are combined and output to the signal lines 20 and 21. Therefore, the distance measurement values of the peripheral portions 4a and 4b are calculated as an average value by the calculation means. When the distance measurement value of the central portion 3 and the average distance measurement value of the peripheral portions 4a and 4b are calculated, the photographing distance setting means 17 is used to calculate the distance measurement value of the central portion 3 and the average distance measurement value of the peripheral portions 4a and 4b. Then, the shooting distance is set and is output as distance information for determining the lens position. Here, the photographing distance setting means 17 1) selects the closer one of the central distance measurement value and the peripheral average distance measurement value 2) selects the closer one of the central distance measurement value and the peripheral average distance measurement value to the front side object scene The shooting distance shall be set by a known method such as setting the distance within the depth. The light receiving element 9a for the central part and the light receiving elements 9b, 9c for the peripheral part shown in FIG. 4 (d) are arranged vertically offset by the distance Δd, so that the objects are at the same distance. Yes Central reflected light beam 5'and left and right reflected light beams 6 ', 7'
As shown by the broken line in FIG. 2, even if the light beams are vertically shifted by the distance Δd, the ratio of the outputs generated from the output terminals 20 and 21 is as follows: Are equal to each other. On the other hand, for reference, the light receiving elements shown in FIGS. 4 (a) to 4 (c) do not shift up and down by the distance .DELTA.d. Therefore, each reflected light flux returned from a subject at the same distance produces an output. The ratio of the outputs sequentially generated from the ends 20 and 21 is deviated by an amount corresponding to the interval Δd between the distance measurement at the central portion and the distance measurement at the peripheral portion. Therefore, FIG. 4 (a)-
When the light receiving element of (c) is adopted, at least one of the distance measurement output of the central portion and the distance measurement output of the peripheral portion is corrected by the calculating means 16 so that the distance measurement values for the objects at the same distance are respectively calculated. Must be equal. For that purpose, for example, a signal is issued from the control means 14 to the calculation means 16 in accordance with the switching between the projection of light to the central portion 3 and the projection of light to the peripheral portions 4a and 4b by the projection switching means 13, and the calculation means 16 In response to this, the distance measurement value in the peripheral portion may be corrected by the distance Δd. Although one embodiment of the present invention has been described above, it goes without saying that the distance measuring direction is not limited to three directions and may be the central portion 3 and a plurality of peripheral portions. Further, although the light receiving element 9 is a PSD (semiconductor position detecting element), it is not limited to this. Furthermore, the order of distance measurement may be such that the central portion comes first and the peripheral portion comes later, or the peripheral portion comes first and the central portion comes later. EFFECTS OF THE INVENTION In the present invention, a plurality of (separate) light receiving portions are used to receive light fluxes from different directions by different light receiving portions. Therefore, the central portion and the peripheral portion of the light receiving portion of the element The ranging accuracy can be improved as compared with a ranging device using a single light receiving section that often has different characteristics. Further, in the present invention, since the plurality of light receiving portions are arranged in parallel and the plurality of light receiving portions are arranged so as to be shifted in the base line length direction, the object existing in the area projected by the first light projecting means and the second
When the subject existing in the area projected by the light projecting means is at the same distance, the output ratios output from the corresponding light receiving parts are also equal in the central part and the peripheral part. Therefore, it is not necessary to correct and adjust the output from each light receiving unit during the distance measurement calculation, and the calculation method can be simplified.
【図面の簡単な説明】
第１図は本発明の一実施例の概念図、第２図は同実施例
の受光部を示す図、第３図は同実施例の回路ブロック
図、第４図（ｄ）は同実施例に採用可能な受光素子の例
を示す図、第４図（ａ）〜（ｃ）は受光素子の参考例を
示す図である。
〔主要部分の符号の説明〕
３、4a、4b……被写界内の測距領域
９……受光素子、
10、11、12……投光素子、
13……投光切換手段
16……演算手段、
17……撮影距離設定手段。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a conceptual diagram of an embodiment of the present invention, FIG. 2 is a diagram showing a light receiving portion of the embodiment, FIG. 3 is a circuit block diagram of the embodiment, and FIG. FIG. 4D is a diagram showing an example of a light receiving element that can be adopted in the same embodiment, and FIGS. 4A to 4C are diagrams showing reference examples of the light receiving element. [Explanation of Signs of Main Parts] 3, 4a, 4b ... Distance-measuring area 9 in the field 9 ... Light receiving element, 10, 11, 12 ... Projecting element, 13 ... Projection switching means 16 ... Calculation means, 17 ... Shooting distance setting means.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭62−14016（ＪＰ，Ａ) 特開 昭62−14017（ＪＰ，Ａ) 特開 昭58−201015（ＪＰ，Ａ) 特開 昭60−60511（ＪＰ，Ａ) 特開 昭58−9013（ＪＰ，Ａ) 実開 昭62−121506（ＪＰ，Ｕ) ────────────────────────────────────────────────── ─── Continuation of front page (56) References Japanese Patent Laid-Open No. 62-14016 (JP, A) JP 62-14017 (JP, A) JP-A-58-201015 (JP, A) JP 60-60511 (JP, A) JP-A-58-9013 (JP, A) 62-121506 (JP, U)
Claims (1)
チ測距装置において、 前記撮影画面に対応した被写界の中央部へ光を投光する
第１投光手段と、 前記被写界の前記中央部に対して基線長方向にズレた異
なる領域へ光を投光する第２投光手段と、 前記第１投光手段の投光に基づく前記中央部からの反射
光を受光する第１受光部と、前記第２投光手段の投光に
基づく前記異なる領域からの反射光を受光する第２受光
部とを備えた受光手段とを有し、 前記第１受光部と前記第２受光部とは、並行配置され前
記基線長方向にズレて配置されていることを特徴とする
マルチ測距装置。 ２．前記第１受光部と前記第２受光部との配置のズレ量
は、前記第１投光手段の投光領域と前記第２投光手段の
投光領域とのズレ量に相当することを特徴とする特許請
求の範囲第１項に記載のマルチ測距装置。 ３．前記第２投光手段は、被写界内の異なる領域にそれ
ぞれ投光する複数の投光部を含み、 前記第２受光部は、前記複数の投光部に基づく投光の、
前記被写界からの反射光をそれぞれ受光する複数の受光
部を含むことを特徴とする特許請求の範囲第１項に記載
のマルチ測距装置。 ４．前記第２投光手段は、被写界内の異なる領域にそれ
ぞれ投光する複数の投光部を含み、 前記第１投光手段と前記第２投光手段とは時系列的に駆
動され、該第２投光手段の複数の投光部は同時に駆動さ
れることを特徴とする特許請求の範囲第１項に記載のマ
ルチ測距装置。 ５．前記第１受光部の両端部と前記第２受光部の両端部
とには、それぞれ共通の出力ラインが設けられており、
該第１受光部の出力と該第２受光部の出力とは該共通出
力ラインを介して合成して出力されることを特徴とする
特許請求の範囲第１項に記載のマルチ測距装置。(57) [Claims] In a multi-rangefinder capable of measuring a plurality of areas within a shooting screen, a first light projecting unit for projecting light to a central portion of the shooting field corresponding to the shooting screen; Second light projecting means for projecting light to different regions deviated in the base length direction from the central part, and first light receiving for receiving reflected light from the central part based on the light projected by the first light projecting means. And a second light receiving unit that receives reflected light from the different region based on the light projected by the second light projecting unit, the first light receiving unit and the second light receiving unit. Is a multi-distance measuring device characterized in that they are arranged in parallel and displaced in the direction of the base line. 2. A displacement amount of the arrangement of the first light receiving unit and the second light receiving unit corresponds to a displacement amount between the light projecting region of the first light projecting unit and the light projecting region of the second light projecting unit. The multi-distance measuring device according to claim 1. 3. The second light projecting unit includes a plurality of light projecting units that respectively project light in different regions in the object scene, and the second light receiving unit is a light projecting unit based on the plurality of light projecting units.
The multi-distance measuring device according to claim 1, further comprising a plurality of light receiving units that respectively receive reflected light from the object scene. 4. The second light projecting unit includes a plurality of light projecting units that respectively project light in different regions in a field, and the first light projecting unit and the second light projecting unit are driven in time series, The multiple distance measuring device according to claim 1, wherein the plurality of light projecting portions of the second light projecting means are driven simultaneously. 5. Common output lines are provided at both ends of the first light receiving portion and both ends of the second light receiving portion, respectively.
The multi-distance measuring device according to claim 1, wherein the output of the first light receiving unit and the output of the second light receiving unit are combined and output via the common output line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62238226A JP2693452B2 (en) | 1987-09-22 | 1987-09-22 | Multi range finder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62238226A JP2693452B2 (en) | 1987-09-22 | 1987-09-22 | Multi range finder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6479610A JPS6479610A (en) | 1989-03-24 |
| JP2693452B2 true JP2693452B2 (en) | 1997-12-24 |
Family
ID=17027022
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62238226A Expired - Lifetime JP2693452B2 (en) | 1987-09-22 | 1987-09-22 | Multi range finder |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2693452B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2871734B2 (en) * | 1989-07-14 | 1999-03-17 | オリンパス光学工業株式会社 | Multi-point distance measuring device |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6214016A (en) * | 1985-07-12 | 1987-01-22 | Canon Inc | Ranging instrument |
| JPS6214017A (en) * | 1985-07-12 | 1987-01-22 | Canon Inc | distance measuring device |
-
1987
- 1987-09-22 JP JP62238226A patent/JP2693452B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6479610A (en) | 1989-03-24 |
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