JPH041523U - - Google Patents

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Publication number
JPH041523U
JPH041523U JP4021990U JP4021990U JPH041523U JP H041523 U JPH041523 U JP H041523U JP 4021990 U JP4021990 U JP 4021990U JP 4021990 U JP4021990 U JP 4021990U JP H041523 U JPH041523 U JP H041523U
Authority
JP
Japan
Prior art keywords
light
distance
receiving element
output level
emitting element
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
Application number
JP4021990U
Other languages
Japanese (ja)
Other versions
JP2540766Y2 (en
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed filed Critical
Priority to JP1990040219U priority Critical patent/JP2540766Y2/en
Publication of JPH041523U publication Critical patent/JPH041523U/ja
Application granted granted Critical
Publication of JP2540766Y2 publication Critical patent/JP2540766Y2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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  • Focusing (AREA)
  • Indication In Cameras, And Counting Of Exposures (AREA)

Description

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は、本考案に係る近距離警告装置の要部
構成を示す回路図、第２図は、第１図に示す実施
例の原理的構成を示すブロツク図、第３図は、第
１図に示す実施例の測距特性を示す測距特性図、
第４図は、第１図に示した実施例の動作を説明す
るためのフローチヤート、第５図は、先願発明を
説明するための説明図、第６図は、従来のカメラ
の測距装置のブロツク図、第７図は、第６図のカ
メラの測距装置の測距特性を示す測距特性図であ
る。 １……ＣＰＵ、２……ＡＥユニツト、Ｌ……基
線長、３……ＡＦＩＣ、４……表示装置、５……
Ａ／Ｄ変換器、６……遠距離用のＬＥＤ、７……
近距離用のＬＥＤ、８……発光回路、９……被写
体、１０……ＰＳＤ、１１……レンズアクチユエ
ーター、１３……比較手段、１４……レリーズス
イツチ、１００……投光部、１０２……受光部、
１０３……投光レンズ、１０４……発光素子、１
０７……受光レンズ、Ｒ１〜Ｒ１４……抵抗、Ｑ
１〜Ｑ６……トランジスタ。 FIG. 1 is a circuit diagram showing the main structure of a short-range warning device according to the present invention, FIG. 2 is a block diagram showing the principle structure of the embodiment shown in FIG. 1, and FIG. A distance measurement characteristic diagram showing the distance measurement characteristics of the example shown in the figure,
FIG. 4 is a flowchart for explaining the operation of the embodiment shown in FIG. 1, FIG. 5 is an explanatory diagram for explaining the invention of the prior application, and FIG. 6 is a conventional distance measuring camera. The block diagram of the apparatus, FIG. 7, is a distance measurement characteristic diagram showing the distance measurement characteristics of the distance measurement device of the camera shown in FIG. 1... CPU, 2... AE unit, L... baseline length, 3... AFIC, 4... display device, 5...
A/D converter, 6...LED for long distance, 7...
LED for short distance, 8... Light emitting circuit, 9... Subject, 10... PSD, 11... Lens actuator, 13... Comparison means, 14... Release switch, 100... Light projecting section, 102 ……Light receiving section,
103...Light projection lens, 104...Light emitting element, 1
07... Light receiving lens, R1 to R14... Resistance, Q
1 to Q6...transistor.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 基線長方向の異なる位置に配置した複数個の発
光素子と、これら複数個の発光素子からそれぞれ
発光され被写体から反射された反射光を受光して
上記被写体までの距離に応じた電気信号を出す受
光素子と、上記発光素子のうち少なくとも上記受
光素子側にある遠距離用の発光素子と上記受光素
子側にない近距離用の発光素子とを選択的に発光
させる発光回路と、上記受光素子からの電気信号
に基づいて上記被写体までの距離を演算する演算
手段と、上記発光回路により上記遠距離用の発光
素子を発光させたときの上記受光素子の出力レベ
ルと上記発光回路により上記近距離用の発光素子
を発光させたときの上記受光素子の出力レベルを
比較する比較手段と、この比較手段による比較の
結果、上記近距離用の発光素子を発光させたとき
の上記受光素子の出力レベルの方が上記遠距離用
の発光素子を発光させたときの受光素子の出力レ
ベルよりも大きいときは警告手段の作動制御を行
う制御手段とを具備したことを特徴とする近距離
警告装置。 A plurality of light emitting elements arranged at different positions in the baseline length direction, and a light receiving device that receives reflected light emitted from each of these plurality of light emitting elements and reflected from a subject, and outputs an electrical signal according to the distance to the subject. a light-emitting circuit that selectively causes at least a long-distance light-emitting element on the light-receiving element side and a short-distance light-emitting element not on the light-receiving element side to emit light among the light-emitting elements; a calculation means for calculating the distance to the subject based on an electrical signal; and a calculation means for calculating the distance to the subject based on the output level of the light receiving element when the light emitting circuit causes the long distance light emitting element to emit light; a comparison means for comparing the output level of the light receiving element when the light emitting element is emitted; and as a result of the comparison by the comparison means, the output level of the light receiving element when the light emitting element for short distance is emitted; 1. A short-distance warning device comprising: control means for controlling the operation of the warning means when the output level of the light-receiving element is greater than the output level of the light-receiving element when the long-distance light-emitting element emits light.
JP1990040219U 1990-04-17 1990-04-17 Short range warning device Expired - Lifetime JP2540766Y2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1990040219U JP2540766Y2 (en) 1990-04-17 1990-04-17 Short range warning device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1990040219U JP2540766Y2 (en) 1990-04-17 1990-04-17 Short range warning device

Publications (2)

Publication Number Publication Date
JPH041523U true JPH041523U (en) 1992-01-08
JP2540766Y2 JP2540766Y2 (en) 1997-07-09

Family

ID=31549820

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1990040219U Expired - Lifetime JP2540766Y2 (en) 1990-04-17 1990-04-17 Short range warning device

Country Status (1)

Country Link
JP (1) JP2540766Y2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4873869A (en) * 1971-12-29 1973-10-05
JPS54152372U (en) * 1978-04-17 1979-10-23

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5618710A (en) * 1979-07-23 1981-02-21 Matsushita Electric Ind Co Ltd Distance measuring instrument
JPS6064336A (en) * 1983-09-19 1985-04-12 Fuji Photo Film Co Ltd Short distance warning device of camera
JPS62209424A (en) * 1985-11-27 1987-09-14 Olympus Optical Co Ltd Automatic focus distance measurement system
JPS6418117A (en) * 1987-07-14 1989-01-20 Konishiroku Photo Ind Range finder for camera

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5618710A (en) * 1979-07-23 1981-02-21 Matsushita Electric Ind Co Ltd Distance measuring instrument
JPS6064336A (en) * 1983-09-19 1985-04-12 Fuji Photo Film Co Ltd Short distance warning device of camera
JPS62209424A (en) * 1985-11-27 1987-09-14 Olympus Optical Co Ltd Automatic focus distance measurement system
JPS6418117A (en) * 1987-07-14 1989-01-20 Konishiroku Photo Ind Range finder for camera

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4873869A (en) * 1971-12-29 1973-10-05
JPS54152372U (en) * 1978-04-17 1979-10-23

Also Published As

Publication number Publication date
JP2540766Y2 (en) 1997-07-09

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Legal Events

Date Code Title Description
EXPY Cancellation because of completion of term