JPS59136621U - Camera aperture amount detection device - Google Patents
Camera aperture amount detection deviceInfo
- Publication number
- JPS59136621U JPS59136621U JP2806183U JP2806183U JPS59136621U JP S59136621 U JPS59136621 U JP S59136621U JP 2806183 U JP2806183 U JP 2806183U JP 2806183 U JP2806183 U JP 2806183U JP S59136621 U JPS59136621 U JP S59136621U
- Authority
- JP
- Japan
- Prior art keywords
- light
- receiving elements
- emitting element
- light emitting
- slit
- 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.)
- Granted
Links
Landscapes
- Optical Transform (AREA)
- Exposure Control For Cameras (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図および第２図は従来のカメラの絞り込み量謂御装
置を示す図であって、第１図はコード板のスリットとフ
ォトインタラプタのフォトトランジスタとの関係を示す
図、第２図はパルス発生回路図、第３図〜第６図はこの
考案に係るカメラの絞り込み量制御装置を示す図であっ
て、第３図は、絞りの動作をコード板に伝達する機構を
示す図、第４図は第３図に示、した機構のフォトインタ
ラプタ付近を示す拡大側面図、第５図はコード板のスリ
ットとフォトインタラプタのフォトトランジスタとの関
係を示す図、第６図はパルス発生回路図である。
１・・・・・・コード板、１ａ・・・・・・スリット、
３・・・・・・発光ダイオード（発光素子）、４Ａ、
４Ｂ・・・・・・フォトトランジスタ（受光素子）、
ＣＯ・・・・・・共通端子、Ｃ□、Ｃ２・・・・・・自
由端子、Ｅ・・・・・・定電圧電源、Ｏ・・・・・・出
力端子。
第３図
第４図1 and 2 are diagrams showing a conventional aperture control device for a camera, in which FIG. 1 shows the relationship between the slit of the code plate and the phototransistor of the photointerrupter, and FIG. 2 shows the pulse Generating circuit diagrams, FIGS. 3 to 6 are diagrams showing the aperture control device for a camera according to this invention, and FIG. 3 is a diagram showing a mechanism for transmitting the operation of the aperture to the code plate, and FIG. The figure is an enlarged side view showing the vicinity of the photointerrupter of the mechanism shown in Fig. 3, Fig. 5 is a diagram showing the relationship between the slit of the code plate and the phototransistor of the photointerrupter, and Fig. 6 is a pulse generation circuit diagram. be. 1... Code plate, 1a... Slit,
3... Light emitting diode (light emitting element), 4A,
4B...Phototransistor (light receiving element),
CO: Common terminal, C□, C2: Free terminal, E: Constant voltage power supply, O: Output terminal. Figure 3 Figure 4
Claims (1)
設けられたコード板と１．前記スリットの移動域に臨ま
された発光素子と、該発光素子と対向する位置で前記ス
リットの移動域に臨まされ、受光した光の強弱に応じて
コンダクタンスが増減する２個の受光素子とを備え、該
２個の受光素子を直列に一接続するとともに、一方の自
由端子を高電位に、他方の自由端子を低電位に保持し、
前記発光素子から前記各受光素子への光路中を絞り込み
量に応じて移動する前記コード板の前記スリットが通過
して前記発光素子からの光が前記２個の受光素子に交互
に当るようにし、前記２個の受光素子の共通端子から絞
り込み量に応じたパルス数のパルス信号を得るようにし
たことを特徴とするカメラの絞り込み量検出装置。1. A code plate having a plurality of slits and provided to be linked to the aperture of the camera; A light emitting element facing the moving area of the slit, and two light receiving elements facing the moving area of the slit at positions facing the light emitting element, the conductance of which increases or decreases depending on the intensity of the received light. , the two light-receiving elements are connected in series, and one free terminal is held at a high potential and the other free terminal is held at a low potential,
passing through the slit of the code plate that moves in an optical path from the light emitting element to each of the light receiving elements according to the amount of narrowing down, so that the light from the light emitting element alternately hits the two light receiving elements; A camera aperture detection device characterized in that a pulse signal having a number of pulses corresponding to the aperture amount is obtained from a common terminal of the two light receiving elements.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2806183U JPS59136621U (en) | 1983-03-01 | 1983-03-01 | Camera aperture amount detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2806183U JPS59136621U (en) | 1983-03-01 | 1983-03-01 | Camera aperture amount detection device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59136621U true JPS59136621U (en) | 1984-09-12 |
| JPH0516582Y2 JPH0516582Y2 (en) | 1993-04-30 |
Family
ID=30158939
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2806183U Granted JPS59136621U (en) | 1983-03-01 | 1983-03-01 | Camera aperture amount detection device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59136621U (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56119807A (en) * | 1980-02-28 | 1981-09-19 | Brother Ind Ltd | Photosensor circuit |
| JPS56124016A (en) * | 1980-03-06 | 1981-09-29 | Brother Ind Ltd | Light detector |
-
1983
- 1983-03-01 JP JP2806183U patent/JPS59136621U/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56119807A (en) * | 1980-02-28 | 1981-09-19 | Brother Ind Ltd | Photosensor circuit |
| JPS56124016A (en) * | 1980-03-06 | 1981-09-29 | Brother Ind Ltd | Light detector |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0516582Y2 (en) | 1993-04-30 |
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