JPH01151205U - - Google Patents
Info
- Publication number
- JPH01151205U JPH01151205U JP4676688U JP4676688U JPH01151205U JP H01151205 U JPH01151205 U JP H01151205U JP 4676688 U JP4676688 U JP 4676688U JP 4676688 U JP4676688 U JP 4676688U JP H01151205 U JPH01151205 U JP H01151205U
- Authority
- JP
- Japan
- Prior art keywords
- offset adjustment
- terminal
- measuring device
- operational amplifier
- camera
- 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 2
- 238000005259 measurement Methods 0.000 claims 1
- 230000000087 stabilizing effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 5
- 239000003990 capacitor Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Landscapes
- Length Measuring Devices By Optical Means (AREA)
- Measurement Of Optical Distance (AREA)
- Focusing (AREA)
Description
第１図は本考案によるカメラの測距装置の回路
構成を示すブロツク線図、第２図は積分回路の構
成図、第３図は積分回路に用いられるオペアンプ
の等価回路図、第４図はアクテイブ測距方式の原
理説明図である。
１……赤外ＬＥＤ、３……被写体、５……ＰＳ
Ｄ、１０ａ，１０ｂ……積分回路、１３……合焦
レンズ、１６……モータ、１８……フオーカスセ
ンサ、２０……オペアンプ、２１……積分コンデ
ンサ、２２……オフセツト調整用半固定抵抗、２
３……ボルテージホロワ。
Figure 1 is a block diagram showing the circuit configuration of a camera distance measuring device according to the present invention, Figure 2 is a configuration diagram of an integrating circuit, Figure 3 is an equivalent circuit diagram of an operational amplifier used in the integrating circuit, and Figure 4 is a block diagram showing the circuit configuration of a camera distance measuring device according to the present invention. FIG. 2 is a diagram explaining the principle of an active ranging method. 1...Infrared LED, 3...Subject, 5...PS
D, 10a, 10b... Integrating circuit, 13... Focusing lens, 16... Motor, 18... Focus sensor, 20... Operational amplifier, 21... Integrating capacitor, 22... Semi-fixed resistor for offset adjustment, 2
3...Voltage follower.
Claims (1)
検出素子で受光し、この光点位置検出素子の出力
信号をオペアンプを用いた積分回路で積分し、そ
の積分値に基づいて被写体距離に対応する測距情
報を出力するカメラの測距装置において、前記オ
ペアンプのオフセツト調整用端子と前記オフセツ
ト調整用端子に調整電圧を供給するためのオフセ
ツト調整用半固定抵抗との間に、前記オフセツト
調整用端子に供給される調整電圧を一定に保つ電
圧安定化回路を接続したことを特徴とするカメラ
の測距装置。 The reflected light of the light projected toward the subject is received by a light spot position detection element, the output signal of this light spot position detection element is integrated by an integrating circuit using an operational amplifier, and the subject distance is determined based on the integrated value. In a distance measuring device for a camera that outputs corresponding distance measurement information, the offset adjustment terminal is connected between the offset adjustment terminal of the operational amplifier and the offset adjustment semi-fixed resistor for supplying an adjustment voltage to the offset adjustment terminal. A distance measuring device for a camera, characterized in that a voltage stabilizing circuit is connected to keep the adjustment voltage supplied to the terminal constant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4676688U JPH01151205U (en) | 1988-04-08 | 1988-04-08 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4676688U JPH01151205U (en) | 1988-04-08 | 1988-04-08 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01151205U true JPH01151205U (en) | 1989-10-19 |
Family
ID=31273019
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4676688U Pending JPH01151205U (en) | 1988-04-08 | 1988-04-08 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01151205U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0642917A (en) * | 1992-07-22 | 1994-02-18 | Railway Technical Res Inst | Apparatus for measuring displacement of rail |
-
1988
- 1988-04-08 JP JP4676688U patent/JPH01151205U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0642917A (en) * | 1992-07-22 | 1994-02-18 | Railway Technical Res Inst | Apparatus for measuring displacement of rail |
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