GB1545437A - Method of automatic follow-up of the focusing of a microscope equipped with a television camera - Google Patents

Method of automatic follow-up of the focusing of a microscope equipped with a television camera

Info

Publication number
GB1545437A
GB1545437A GB1405677A GB1405677A GB1545437A GB 1545437 A GB1545437 A GB 1545437A GB 1405677 A GB1405677 A GB 1405677A GB 1405677 A GB1405677 A GB 1405677A GB 1545437 A GB1545437 A GB 1545437A
Authority
GB
United Kingdom
Prior art keywords
drive
image
maximum
rectified
focusing
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
GB1405677A
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.)
Carl Zeiss AG
Original Assignee
Carl Zeiss AG
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 Carl Zeiss AG filed Critical Carl Zeiss AG
Publication of GB1545437A publication Critical patent/GB1545437A/en
Expired legal-status Critical Current

Links

Classifications

    • 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)
  • Engineering & Computer Science (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Automatic Focus Adjustment (AREA)
  • Microscoopes, Condenser (AREA)

Abstract

The focussing drive (4) is moved into an initial position by manual tripping by the observer or by automatic tripping at prescribed instants. The search run starts in the opposite direction starting from said position. At the same time, a specific high-frequency band whose signal intensity is used as an objective criterion for the image contrast is filtered (8) from the video signal of the camera and rectified (10). Upon overshooting of the optimal focussing, the image has maximum contrast, and the rectified signal therefore achieves a maximum. Thereupon, the drive (4) is reversed and there is backward motion at the same speed over a specific time interval. This interval is fixed by the instants of the maximum detection of the rectified signal and of the reversal of the drive. <IMAGE>
GB1405677A 1976-04-10 1977-04-04 Method of automatic follow-up of the focusing of a microscope equipped with a television camera Expired GB1545437A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19762615841 DE2615841C3 (en) 1976-04-10 1976-04-10 Method for automatically adjusting the focus of a microscope equipped with a television camera

Publications (1)

Publication Number Publication Date
GB1545437A true GB1545437A (en) 1979-05-10

Family

ID=5975093

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1405677A Expired GB1545437A (en) 1976-04-10 1977-04-04 Method of automatic follow-up of the focusing of a microscope equipped with a television camera

Country Status (4)

Country Link
AT (1) AT351293B (en)
CH (1) CH614292A5 (en)
DE (1) DE2615841C3 (en)
GB (1) GB1545437A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2201809A (en) * 1986-12-09 1988-09-07 Microworld Of Inner Space Improvements in or relating to display means
US4958920A (en) * 1988-08-20 1990-09-25 Carl-Zeiss-Stiftung Process and apparatus for the automatic focusing of microscopes
US5029996A (en) * 1987-09-17 1991-07-09 Buxton Micrarium Limited Microscope viewing arrangement
US5365053A (en) * 1991-02-19 1994-11-15 Linotype-Hell Ag Method and apparatus for setting the sharpness of an optical imaging system
US6974938B1 (en) 2000-03-08 2005-12-13 Tibotec Bvba Microscope having a stable autofocusing apparatus

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53116852A (en) * 1977-03-23 1978-10-12 Olympus Optical Co Ltd Automatic focus adjusting system
JPS5529832A (en) * 1978-08-23 1980-03-03 Asahi Optical Co Ltd Camera focus indicator
JPS56132315A (en) * 1980-03-19 1981-10-16 Fuji Photo Film Co Ltd Automatic focusing method
DE4105001C2 (en) * 1991-02-19 1995-03-23 Hell Ag Linotype Method and device for focusing an optical imaging system
DE4105003A1 (en) * 1991-02-19 1992-08-20 Hell Ag Linotype METHOD AND DEVICE FOR FOCUSING AN OPTICAL IMAGING SYSTEM
US5790710A (en) * 1991-07-12 1998-08-04 Jeffrey H. Price Autofocus system for scanning microscopy
US5932872A (en) * 1994-07-01 1999-08-03 Jeffrey H. Price Autofocus system for scanning microscopy having a volume image formation
ES2131838T3 (en) * 1994-07-01 1999-08-01 Jeffrey H Price AUTOFOCUS SYSTEM FOR EXPLORATION MICROSCOPY.
DE10051301A1 (en) * 2000-10-13 2002-04-25 Zeiss Carl Jena Gmbh Electrically motorized microscope with a number of electrically controlled components has an operating element that allows an image to be automatically obtained by resetting of an optical path

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2201809A (en) * 1986-12-09 1988-09-07 Microworld Of Inner Space Improvements in or relating to display means
US5029996A (en) * 1987-09-17 1991-07-09 Buxton Micrarium Limited Microscope viewing arrangement
US4958920A (en) * 1988-08-20 1990-09-25 Carl-Zeiss-Stiftung Process and apparatus for the automatic focusing of microscopes
US5365053A (en) * 1991-02-19 1994-11-15 Linotype-Hell Ag Method and apparatus for setting the sharpness of an optical imaging system
US6974938B1 (en) 2000-03-08 2005-12-13 Tibotec Bvba Microscope having a stable autofocusing apparatus
US7016110B2 (en) 2000-03-08 2006-03-21 Tibotec Bvba Microscope suitable for high-throughput screening having an autofocusing apparatus

Also Published As

Publication number Publication date
DE2615841C3 (en) 1978-10-19
CH614292A5 (en) 1979-11-15
ATA233077A (en) 1978-12-15
DE2615841B2 (en) 1978-03-02
DE2615841A1 (en) 1977-10-13
AT351293B (en) 1979-07-10

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee