JPH0227126U - - Google Patents
Info
- Publication number
- JPH0227126U JPH0227126U JP9617789U JP9617789U JPH0227126U JP H0227126 U JPH0227126 U JP H0227126U JP 9617789 U JP9617789 U JP 9617789U JP 9617789 U JP9617789 U JP 9617789U JP H0227126 U JPH0227126 U JP H0227126U
- Authority
- JP
- Japan
- Prior art keywords
- light
- light receiving
- subject
- intensity
- signal
- 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.)
- Pending
Links
- 238000001514 detection method Methods 0.000 claims description 4
- 230000003287 optical effect Effects 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 3
Landscapes
- Focusing (AREA)
Description
第１図は本考案の測距装置のブロツク図、第２
図は位置検出素子の側面図、第３図は位置検出素
子の動作説明図、第４図は位置検出素子を用いた
場合の測距装置の回路図である。
１…投光駆動回路、２…発光素子、３…投射レ
ンズ、４…受光レンズ、５…受光素子、６…反射
光検出回路、７…距離識別回路、８…撮影レンズ
制御装置、９…表示装置、１０…投光強度制御回
路、１２…抵抗層、１３…基層、１５…発光素子
より遠い側の電極、１６…発光素子に近い側の電
極、１７…共通電極、２２…発振器。
Figure 1 is a block diagram of the distance measuring device of the present invention, Figure 2
3 is a side view of the position detecting element, FIG. 3 is an explanatory diagram of the operation of the position detecting element, and FIG. 4 is a circuit diagram of a distance measuring device using the position detecting element. DESCRIPTION OF SYMBOLS 1...Light projection drive circuit, 2...Light emitting element, 3...Projection lens, 4...Light receiving lens, 5...Light receiving element, 6...Reflected light detection circuit, 7...Distance identification circuit, 8...Photographing lens control device, 9...Display Apparatus, 10... Light projection intensity control circuit, 12... Resistance layer, 13... Base layer, 15... Electrode on the side farther from the light emitting element, 16... Electrode on the side closer to the light emitting element, 17... Common electrode, 22... Oscillator.
Claims (1)
ことによりカメラから被写体までの距離を決定す
るカメラの自動測距装置において、被写体から反
射して入射する光の強度に応じて変化する電気信
号を出力する受光手段と、該受光手段からの電気
信号を受けて距離の識別を行う手段と、該距離識
別手段と被写体に光を投射する投光手段との間に
設けられ、受光素子に入射する被写体からの反射
光の強度によつて変化する前記電気信号を受けて
、受光素子への入射強度が所定のレベルに維持さ
れるように、前記電気信号のレベルに応じて投光
手段の発光強度を制御する投光強度制御手段とを
備えていることを特徴とするカメラの自動測距装
置。 (2) 受光素子が受光面に抵抗層を有し且つ該抵
抗層の両側に設けられた電極が、反射光の受光点
の位置に従つて変化する信号を出力する形式の位
置検出素子である実用新案登録請求の範囲第(1)
項記載の装置。 (3) 位置検出装置の中心が受光光学系の光軸に
一致しており、該位置検出素子の、投光素子より
遠い側にある電極からの信号が投光手段へ入力さ
れている実用新案登録請求の範囲第(2)項記載の
装置。 (4) 受光素子がフオトダイオードアレイであり
、該アレイ内の最大レベルの信号が投光手段へ入
力されている実用新案登録請求の範囲第(1)項記
載の装置。[Scope of Claim for Utility Model Registration] (1) Light that is reflected from the subject and enters the camera's automatic distance measuring device, which determines the distance from the camera to the subject by projecting light onto the subject and receiving the reflected light. a light receiving means that outputs an electrical signal that changes depending on the intensity of the light receiving means; a means that receives the electrical signal from the light receiving means to identify the distance; and a light projecting means that projects light onto the distance identifying means and the subject. The electric signal is provided between the light receiving element and receives the electric signal, which changes depending on the intensity of the reflected light from the subject that enters the light receiving element, so that the intensity of the electric signal incident on the light receiving element is maintained at a predetermined level. 1. An automatic distance measuring device for a camera, comprising: a light projection intensity control means for controlling the light emission intensity of the light projection means according to a level. (2) A position detection element in which the light receiving element has a resistive layer on its light receiving surface, and electrodes provided on both sides of the resistive layer output a signal that changes according to the position of the light receiving point of the reflected light. Scope of claim for utility model registration No. (1)
Apparatus described in section. (3) A utility model in which the center of the position detection device is aligned with the optical axis of the light receiving optical system, and a signal from an electrode of the position detection element on the side farther from the light emitting element is input to the light emitting means. The device according to registered claim (2). (4) The device according to claim 1, wherein the light receiving element is a photodiode array, and the maximum level signal in the array is input to the light projecting means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9617789U JPH0227126U (en) | 1989-08-17 | 1989-08-17 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9617789U JPH0227126U (en) | 1989-08-17 | 1989-08-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0227126U true JPH0227126U (en) | 1990-02-22 |
Family
ID=31321016
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9617789U Pending JPH0227126U (en) | 1989-08-17 | 1989-08-17 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0227126U (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52374A (en) * | 1975-06-23 | 1977-01-05 | Takeda Seisakusho Kk | Electric circuit substrate |
| JPS54139728A (en) * | 1978-04-07 | 1979-10-30 | Agfa Gevaert Ag | Device for adjusting focus of camera |
| JPS5587007A (en) * | 1978-12-25 | 1980-07-01 | Agency Of Ind Science & Technol | Semiconductor photo position detector |
-
1989
- 1989-08-17 JP JP9617789U patent/JPH0227126U/ja active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52374A (en) * | 1975-06-23 | 1977-01-05 | Takeda Seisakusho Kk | Electric circuit substrate |
| JPS54139728A (en) * | 1978-04-07 | 1979-10-30 | Agfa Gevaert Ag | Device for adjusting focus of camera |
| JPS5587007A (en) * | 1978-12-25 | 1980-07-01 | Agency Of Ind Science & Technol | Semiconductor photo position detector |
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