JPS5540423A - Distance information judging circuit of auto focus detector - Google Patents

Distance information judging circuit of auto focus detector

Info

Publication number
JPS5540423A
JPS5540423A JP11301878A JP11301878A JPS5540423A JP S5540423 A JPS5540423 A JP S5540423A JP 11301878 A JP11301878 A JP 11301878A JP 11301878 A JP11301878 A JP 11301878A JP S5540423 A JPS5540423 A JP S5540423A
Authority
JP
Japan
Prior art keywords
circuit
counter
count output
distance measurement
measurement end
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
JP11301878A
Other languages
English (en)
Japanese (ja)
Other versions
JPS6318172B2 (enrdf_load_stackoverflow
Inventor
Shingi Hagiuda
Hiroaki Tanaka
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nikon Corp
Nippon Chemical Industrial Co Ltd
Original Assignee
Nippon Chemical Industrial Co Ltd
Nippon Kogaku KK
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 by Nippon Chemical Industrial Co Ltd, Nippon Kogaku KK filed Critical Nippon Chemical Industrial Co Ltd
Priority to JP11301878A priority Critical patent/JPS5540423A/ja
Priority to DE19792936992 priority patent/DE2936992A1/de
Publication of JPS5540423A publication Critical patent/JPS5540423A/ja
Publication of JPS6318172B2 publication Critical patent/JPS6318172B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/28—Systems for automatic generation of focusing signals
    • G02B7/36—Systems for automatic generation of focusing signals using image sharpness techniques, e.g. image processing techniques for generating autofocus signals
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
    • G01C3/00—Measuring distances in line of sight; Optical rangefinders
    • G01C3/02—Details
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
    • G01C3/00—Measuring distances in line of sight; Optical rangefinders
    • G01C3/32—Measuring distances in line of sight; Optical rangefinders by focusing the object, e.g. on a ground glass screen

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Optics & Photonics (AREA)
  • Focusing (AREA)
  • Measurement Of Optical Distance (AREA)
  • Automatic Focus Adjustment (AREA)
JP11301878A 1978-09-14 1978-09-14 Distance information judging circuit of auto focus detector Granted JPS5540423A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP11301878A JPS5540423A (en) 1978-09-14 1978-09-14 Distance information judging circuit of auto focus detector
DE19792936992 DE2936992A1 (de) 1978-09-14 1979-09-13 Entfernungswert-auswertungsschaltung fuer eine fokus-detektoreinrichtung

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11301878A JPS5540423A (en) 1978-09-14 1978-09-14 Distance information judging circuit of auto focus detector

Publications (2)

Publication Number Publication Date
JPS5540423A true JPS5540423A (en) 1980-03-21
JPS6318172B2 JPS6318172B2 (enrdf_load_stackoverflow) 1988-04-18

Family

ID=14601368

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11301878A Granted JPS5540423A (en) 1978-09-14 1978-09-14 Distance information judging circuit of auto focus detector

Country Status (2)

Country Link
JP (1) JPS5540423A (enrdf_load_stackoverflow)
DE (1) DE2936992A1 (enrdf_load_stackoverflow)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4492452A (en) * 1982-04-07 1985-01-08 Tokyo Shibaura Denki Kabushiki Kaisha Picture blur-alarm device for a camera
JPS6166605A (ja) * 1984-09-11 1986-04-05 Noriisa Tao 木粉末成型品の製造方法
JPS63135600A (ja) * 1986-11-26 1988-06-07 松下電工株式会社 鉱物繊維板の曲面加工方法

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3783269A (en) * 1972-06-05 1974-01-01 Honeywell Inc Automatic focus positioning circuit
JPS51105722A (enrdf_load_stackoverflow) * 1975-03-14 1976-09-18 Yokogawa Electric Works Ltd

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5932762B2 (ja) * 1974-02-16 1984-08-10 旭光学工業 （株） 焦点検出装置
US4010479A (en) * 1974-07-10 1977-03-01 Asahi Kogaku Kogyo Kabushiki Kaisha Focusing apparatus for optical systems

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3783269A (en) * 1972-06-05 1974-01-01 Honeywell Inc Automatic focus positioning circuit
JPS51105722A (enrdf_load_stackoverflow) * 1975-03-14 1976-09-18 Yokogawa Electric Works Ltd

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4492452A (en) * 1982-04-07 1985-01-08 Tokyo Shibaura Denki Kabushiki Kaisha Picture blur-alarm device for a camera
JPS6166605A (ja) * 1984-09-11 1986-04-05 Noriisa Tao 木粉末成型品の製造方法
JPS63135600A (ja) * 1986-11-26 1988-06-07 松下電工株式会社 鉱物繊維板の曲面加工方法

Also Published As

Publication number Publication date
JPS6318172B2 (enrdf_load_stackoverflow) 1988-04-18
DE2936992A1 (de) 1980-04-03
DE2936992C2 (enrdf_load_stackoverflow) 1991-02-14

Similar Documents

Publication Publication Date Title
EP0085495A2 (en) High-sensitive optical reading apparatus and method of reading optical information
JPS5331920A (en) Bar code reader
JPS57204977A (en) Method and device for bar code read
GB1515467A (en) Optical devices for measuring the position of a movable member
JPS5540423A (en) Distance information judging circuit of auto focus detector
RU2001102296A (ru) Способ регистрации дыма и устройство для его осуществления
US4269491A (en) Distance information judging circuit for focus detecting apparatus
JPS5628868A (en) Form slide displacement accomodation device in light beam recording device
JPS5644821A (en) Measuring method of optical lens focal distance and measuring system therefor
RU2042270C1 (ru) Устройство для поиска шумоподобного сигнала
SU1188517A1 (ru) Устройство дл измерени длины движущихс объектов
JPS57146103A (en) Measuring system for size
JPS55127681A (en) Character position detector
JPS57119215A (en) Optical rotary encoder
JPS55135972A (en) Character line direction discrimination circuit
SU1566317A1 (ru) Устройство дл фазовой коррекции последовательности временных сигналов
SU1490485A1 (ru) Преобразователь изображени дл измерителей перемещени
SU864578A1 (ru) Пересчетное устройство
JPS5738066A (en) Picture area discriminating method
SU429361A1 (ru) Устройство для измерения амплитуды напряжения
RU1789901C (ru) Устройство дл контрол децентрировки
SU1078604A1 (ru) Удвоитель частоты следовани импульсов
RU1833884C (ru) Устройство дл решени задачи анализа характеристик систем сбора и обработки информации
JPS6223349B2 (enrdf_load_stackoverflow)
SU657402A1 (ru) Устройство дл определени центров последовательных временных меток