JPS6445825U - - Google Patents
Info
- Publication number
- JPS6445825U JPS6445825U JP1987141131U JP14113187U JPS6445825U JP S6445825 U JPS6445825 U JP S6445825U JP 1987141131 U JP1987141131 U JP 1987141131U JP 14113187 U JP14113187 U JP 14113187U JP S6445825 U JPS6445825 U JP S6445825U
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- outputs
- signal
- iris
- photometry
- 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
- 238000005375 photometry Methods 0.000 claims 2
- 238000005259 measurement Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Exposure Control For Cameras (AREA)
Description
第１図は本考案の一実施例を示す図である。第
２図及び第３図は従来例を示す図である。
１０……撮像素子、Ｏ′……入射光、Ｏ″……
測定用光、２２……受光素子（測光回路）、Ｓ″
……測光信号、Ｖ……参照電圧（参照信号）、１
４……比較回路、１６……絞り駆動回路、３２…
…シヤツタスピード設定手段、３８……補正回路
。
FIG. 1 is a diagram showing an embodiment of the present invention. FIGS. 2 and 3 are diagrams showing conventional examples. 10...Image sensor, O'...Incoming light, O''...
Measuring light, 22... Light receiving element (photometric circuit), S''
...Photometric signal, V...Reference voltage (reference signal), 1
4...Comparison circuit, 16...Aperture drive circuit, 32...
...Shutter speed setting means, 38...Correction circuit.
Claims (1)
測定用光Ｏ″を受け測光信号Ｓ″を出力する測光
回路２２と、 前記測光信号Ｓ″と参照信号Ｖを比較してアイ
リス駆動信号を出力する比較回路１４と、 前記アイリス駆動信号により開閉制御されて前
記入射光の光量を調整する絞り駆動回路１６とを
、 備えるオートアイリス回路に於いて、 前記測光信号Ｓ″と前記参照信号Ｖの少なくと
も一方の値をシヤツタスピードに応じて補正して
前記比較回路１４に出力する補正回路３８を、 備えることを特徴とするオートアイリス回路。[Claims for Utility Model Registration] A photometry circuit 22 that receives measurement light O'' proportional to incident light O' incident on the image sensor 10 and outputs a photometry signal S''; An auto iris circuit comprising: a comparison circuit 14 that compares and outputs an iris drive signal; and an aperture drive circuit 16 that is controlled to open and close by the iris drive signal to adjust the amount of incident light; and a correction circuit 38 that corrects the value of at least one of the reference signal V and the reference signal V according to the shutter speed and outputs the corrected value to the comparison circuit 14.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987141131U JPS6445825U (en) | 1987-09-16 | 1987-09-16 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987141131U JPS6445825U (en) | 1987-09-16 | 1987-09-16 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6445825U true JPS6445825U (en) | 1989-03-20 |
Family
ID=31405931
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987141131U Pending JPS6445825U (en) | 1987-09-16 | 1987-09-16 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6445825U (en) |
-
1987
- 1987-09-16 JP JP1987141131U patent/JPS6445825U/ja active Pending
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