JPH0418826U - - Google Patents
Info
- Publication number
- JPH0418826U JPH0418826U JP5868890U JP5868890U JPH0418826U JP H0418826 U JPH0418826 U JP H0418826U JP 5868890 U JP5868890 U JP 5868890U JP 5868890 U JP5868890 U JP 5868890U JP H0418826 U JPH0418826 U JP H0418826U
- Authority
- JP
- Japan
- Prior art keywords
- areas
- determination level
- detection device
- camera
- subject distance
- 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 6
- 238000005375 photometry Methods 0.000 claims description 4
- 238000005259 measurement Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 9
- 239000010410 layer Substances 0.000 description 9
- 239000000203 mixture Substances 0.000 description 4
- 239000002131 composite material Substances 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 239000002346 layers by function Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
Landscapes
- Exposure Control For Cameras (AREA)
Description
第１図は、本考案に係るカメラの逆光検出装置
に用いられる受光部の光学的配置を示す主要構成
図、第２図は、第１図の受光部を構成する複合受
光板を示す平面図である。第３図および第４図は
、明るさに対する内側受光素子層と外側受光素子
層の感度をそれぞれ示す感度特性図である。第５
図は、第２図に示す各電気的機能層に係る接続説
明図、第６図は、目標被写体領域および背景領域
の輝度値と分圧電圧との相関特性を示す相関特性
図である。第７図は、図示実施例のカメラの逆光
検出装置に用いられる逆光検出演算回路の一例を
示す回路図である。第８図は、使用頻度の高い撮
影距離に位置する人物の顔の部分と目標被写体領
域との関係が、理想的な関係になつている場合の
構図を示す測光説明図、第９図は、撮影される人
物が第８図の撮影距離よりも遠い撮影距離に位置
している場合の構図を示す測光説明図、第１０図
は、撮影される人物が第８図の撮影距離よりも近
い撮影距離に位置している場合の構図を示す測光
説明図である。
１……受光部、２……測光光学系、２ａ……後
側焦点面、ｆ……焦点距離、３……複合受光板、
４……絶縁基板、５……内側受光素子層、６……
外側受光素子層、７……内側電極層、８……中間
電極層、９……外側電極層（基準端子）、１１…
…コンパレータ、１１ａ……入力側端子、１１ｂ
……参照側端子、１１ｃ……判定信号出力端子、
１２……可変抵抗器、１２ａ……可動端子、１３
……自動測距装置、１４……目標被写体領域、１
５……背景領域、１６……被写界領域、θｓｐ…
…目標被写体領域の範囲、θａｖｃ……背景領域
の範囲、Ｒｓｐ……内側受光素子層５の可変抵抗
値、Ｒａｖｅ……外側受光素子層６の可変抵抗値
、Ｖｃｃ……基準電圧、Ｖｏｕｔ……分圧電圧、
Ｖｒｅｆ……比較基準電位。
FIG. 1 is a main configuration diagram showing the optical arrangement of a light receiving section used in a backlight detection device for a camera according to the present invention, and FIG. 2 is a plan view showing a composite light receiving plate constituting the light receiving section of FIG. 1. It is. FIG. 3 and FIG. 4 are sensitivity characteristic diagrams showing the sensitivity of the inner light receiving element layer and the outer light receiving element layer to brightness, respectively. Fifth
The figure is an explanatory diagram of connections related to each electrical functional layer shown in FIG. 2, and FIG. 6 is a correlation characteristic diagram showing the correlation characteristic between the luminance values of the target subject area and the background area and the divided voltage. FIG. 7 is a circuit diagram showing an example of a backlight detection calculation circuit used in the camera backlight detection device of the illustrated embodiment. FIG. 8 is a photometric explanatory diagram showing a composition when the relationship between the target subject area and the face of a person located at a frequently used shooting distance is in an ideal relationship, and FIG. A photometric explanatory diagram showing the composition when the person being photographed is located at a shooting distance farther than the photographing distance shown in Fig. 8, and Fig. 10 is a photometry explanatory diagram showing the composition when the person being photographed is located at a shooting distance farther than the photographing distance shown in Fig. 8. FIG. 3 is a photometric explanatory diagram showing a composition when the subject is located at a distance. DESCRIPTION OF SYMBOLS 1... Light receiving part, 2... Photometry optical system, 2a... Rear focal plane, f... Focal length, 3... Composite light receiving plate,
4... Insulating substrate, 5... Inner light receiving element layer, 6...
Outer light receiving element layer, 7... Inner electrode layer, 8... Intermediate electrode layer, 9... Outer electrode layer (reference terminal), 11...
...Comparator, 11a...Input side terminal, 11b
...Reference side terminal, 11c...Judgment signal output terminal,
12...Variable resistor, 12a...Movable terminal, 13
... Automatic distance measuring device, 14 ... Target subject area, 1
5... Background area, 16... Field area, θsp...
... Range of target subject area, θavc... Range of background area, Rsp... Variable resistance value of inner light receiving element layer 5, Rave... Variable resistance value of outer light receiving element layer 6, Vcc... Reference voltage, Vout... divided voltage,
Vref: Comparison reference potential.
Claims (1)
の領域に区画し、この２つ以上の領域を別個の測
光対象領域として測光すると共に、これらの測光
対象領域間に存在する輝度差または輝度比率を検
出し、検出された輝度差または輝度比率が所定の
判定レベルに達したときに、逆光状態であると判
定するカメラの逆光検出装置において、前記所定
の判定レベルを被写体距離に応じて新しい判定レ
ベルに変更し得るように構成したことを特徴とす
るカメラの逆光検出装置。 (2) 被写体距離に応じて変更した前記新しい判
定レベルを、前記被写体距離の自動測距結果に基
づいて自動的に設定したことを特徴とする請求項
１に記載のカメラの逆光検出装置。[Claims for Utility Model Registration] (1) A field area corresponding to a photographic screen is divided into two or more areas, and these two or more areas are photometered as separate photometry target areas, and these photometry areas are A backlight detection device for a camera that detects a brightness difference or a brightness ratio that exists between target areas and determines that a backlight condition exists when the detected brightness difference or brightness ratio reaches a predetermined determination level. 1. A backlight detection device for a camera, characterized in that the determination level can be changed to a new determination level according to a subject distance. (2) The backlight detection device for a camera according to claim 1, wherein the new determination level changed according to the subject distance is automatically set based on the automatic distance measurement result of the subject distance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5868890U JPH0418826U (en) | 1990-06-02 | 1990-06-02 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5868890U JPH0418826U (en) | 1990-06-02 | 1990-06-02 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0418826U true JPH0418826U (en) | 1992-02-17 |
Family
ID=31584528
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5868890U Pending JPH0418826U (en) | 1990-06-02 | 1990-06-02 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0418826U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01294535A (en) * | 1988-05-23 | 1989-11-28 | Mitsubishi Metal Corp | Production of complex metallic oxide |
-
1990
- 1990-06-02 JP JP5868890U patent/JPH0418826U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01294535A (en) * | 1988-05-23 | 1989-11-28 | Mitsubishi Metal Corp | Production of complex metallic oxide |
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