GB1420648A - Automatic focusing of an optical system - Google Patents

Automatic focusing of an optical system

Info

Publication number
GB1420648A
GB1420648A GB1227273A GB1227273A GB1420648A GB 1420648 A GB1420648 A GB 1420648A GB 1227273 A GB1227273 A GB 1227273A GB 1227273 A GB1227273 A GB 1227273A GB 1420648 A GB1420648 A GB 1420648A
Authority
GB
United Kingdom
Prior art keywords
grey
value
values
grey value
image
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.)
Expired
Application number
GB1227273A
Other languages
English (en)
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.)
OHTERS
UPPSALA DATAMASKINCENTRAL FOR
Original Assignee
OHTERS
UPPSALA DATAMASKINCENTRAL FOR
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 OHTERS, UPPSALA DATAMASKINCENTRAL FOR filed Critical OHTERS
Publication of GB1420648A publication Critical patent/GB1420648A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/40—Optical focusing aids
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B21/00—Microscopes
    • G02B21/24—Base structure
    • G02B21/241—Devices for focusing
    • G02B21/244—Devices for focusing using image analysis techniques

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Microscoopes, Condenser (AREA)
  • Automatic Focus Adjustment (AREA)
  • Focusing (AREA)
  • Insulators (AREA)
GB1227273A 1972-03-17 1973-03-14 Automatic focusing of an optical system Expired GB1420648A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE7203481A SE373214B (US07223432-20070529-C00017.png) 1972-03-17 1972-03-17

Publications (1)

Publication Number Publication Date
GB1420648A true GB1420648A (en) 1976-01-07

Family

ID=20262223

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1227273A Expired GB1420648A (en) 1972-03-17 1973-03-14 Automatic focusing of an optical system

Country Status (8)

Country Link
US (1) US3932733A (US07223432-20070529-C00017.png)
JP (1) JPS5338926B2 (US07223432-20070529-C00017.png)
AT (1) AT352442B (US07223432-20070529-C00017.png)
CH (1) CH567731A5 (US07223432-20070529-C00017.png)
DE (1) DE2312978C3 (US07223432-20070529-C00017.png)
FR (1) FR2176816B1 (US07223432-20070529-C00017.png)
GB (1) GB1420648A (US07223432-20070529-C00017.png)
SE (1) SE373214B (US07223432-20070529-C00017.png)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2195214A (en) * 1980-12-10 1988-03-30 Emi Ltd Automatically focussing system for an optical system

Families Citing this family (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4047187A (en) 1974-04-01 1977-09-06 Canon Kabushiki Kaisha System for exposure measurement and/or focus detection by means of image senser
DE2560134C2 (de) * 1974-04-01 1985-10-10 Canon K.K., Tokyo Vorrichtung zur Ermittlung des Abbildungszustands eines Bildes
US4012634A (en) * 1974-04-29 1977-03-15 Geometric Data Corporation Automatic focusing system including quantizing means
DE2436528C2 (de) * 1974-07-29 1982-11-25 Ernst Leitz Wetzlar Gmbh, 6330 Wetzlar Elektro-optische Scharfstelleinrichtung
JPS5158333A (ja) * 1974-11-18 1976-05-21 Canon Kk Jidoshotenchosetsusochi
JPS5331151A (en) * 1976-09-03 1978-03-24 Hitachi Ltd Automatic focusing device for microscope
US4202037A (en) * 1977-04-22 1980-05-06 Der Loos Hendrik Van Computer microscope apparatus and method for superimposing an electronically-produced image from the computer memory upon the image in the microscope's field of view
DE2910875C2 (de) * 1979-03-20 1985-11-14 Kernforschungszentrum Karlsruhe Gmbh, 7500 Karlsruhe Verfahren zur automatischen Scharfeinstellung
US4295200A (en) * 1979-11-02 1981-10-13 The United States Of America As Represented By The Secretary Of The Navy Automatic particle analyzing system
US4360885A (en) * 1980-01-02 1982-11-23 Edgar Albert D Micro-optical tomography
JPS56132315A (en) * 1980-03-19 1981-10-16 Fuji Photo Film Co Ltd Automatic focusing method
US4468694A (en) * 1980-12-30 1984-08-28 International Business Machines Corporation Apparatus and method for remote displaying and sensing of information using shadow parallax
JPS58123064A (ja) * 1982-01-14 1983-07-22 三菱電機株式会社 自動車用空気調和装置
US4449084A (en) * 1981-12-28 1984-05-15 University Of Pittsburgh Positioning servo-mechanism or tachometer employing self-scanning light sensing array
DE3308851A1 (de) * 1983-03-12 1984-09-13 Kernforschungszentrum Karlsruhe Gmbh, 7500 Karlsruhe Verfahren und einrichtung zum automatischen fokussieren
DE3308852A1 (de) * 1983-03-12 1984-09-13 Kernforschungszentrum Karlsruhe Gmbh, 7500 Karlsruhe Verfahren und einrichtung zum automatischen fokussieren
EP0124241B1 (en) * 1983-03-29 1988-11-02 Olympus Optical Co., Ltd. Microscope provided with automatic focusing device
JPS60121407A (ja) * 1983-11-09 1985-06-28 Shinetsu Eng Kk 焦点合せ方法
EP0152504B1 (de) * 1984-02-22 1987-11-04 Ibm Deutschland Gmbh Farbtuch-Korrektureinrichtung für Drucker
US5040228A (en) * 1989-08-28 1991-08-13 At&T Bell Laboratories Method and apparatus for automatically focusing an image-acquisition device
JP2904841B2 (ja) * 1990-01-22 1999-06-14 株式会社リコー 自動合焦装置
US5338924A (en) * 1992-08-11 1994-08-16 Lasa Industries, Inc. Apparatus and method for automatic focusing of light using a fringe plate
JP3058781B2 (ja) * 1993-07-30 2000-07-04 松下電器産業株式会社 合焦点位置検出方法
WO1997004348A1 (en) * 1995-07-19 1997-02-06 Morphometrix Technologies Inc. Automatic focus system
US6115111A (en) * 1998-10-05 2000-09-05 Korah; John K. Semiconductor laser based sensing device
SE518836C2 (sv) * 1999-05-25 2002-11-26 Flir Systems Ab Anordning och förfarande för ett infrarött bildanalyserande autofokus
US7598996B2 (en) * 2004-11-16 2009-10-06 Aptina Imaging Corporation System and method for focusing a digital camera

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3450833A (en) * 1966-01-14 1969-06-17 Itek Corp Automatic focusing system for a flying-spot scanner
GB1325439A (en) * 1969-11-05 1973-08-01 Image Analysing Computers Ltd Focusing
CH518562A (de) * 1970-02-24 1972-01-31 Zeiss Carl Fa Verfahren und Vorrichtung zur automatischen Fokussierung von Mikroskopen
US3699251A (en) * 1971-09-27 1972-10-17 Us Navy Automatic optical probe focus apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2195214A (en) * 1980-12-10 1988-03-30 Emi Ltd Automatically focussing system for an optical system

Also Published As

Publication number Publication date
DE2312978B2 (de) 1978-06-15
FR2176816B1 (US07223432-20070529-C00017.png) 1977-02-04
DE2312978C3 (de) 1979-02-08
ATA237873A (de) 1979-02-15
DE2312978A1 (de) 1973-10-04
US3932733A (en) 1976-01-13
AT352442B (de) 1979-09-25
CH567731A5 (US07223432-20070529-C00017.png) 1975-10-15
FR2176816A1 (US07223432-20070529-C00017.png) 1973-11-02
SE373214B (US07223432-20070529-C00017.png) 1975-01-27
JPS5338926B2 (US07223432-20070529-C00017.png) 1978-10-18
JPS496938A (US07223432-20070529-C00017.png) 1974-01-22

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee