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GB2258109B - Autofocus systems - Google Patents

Autofocus systems

Info

Publication number
GB2258109B
GB2258109B GB9116121A GB9116121A GB2258109B GB 2258109 B GB2258109 B GB 2258109B GB 9116121 A GB9116121 A GB 9116121A GB 9116121 A GB9116121 A GB 9116121A GB 2258109 B GB2258109 B GB 2258109B
Authority
GB
United Kingdom
Prior art keywords
autofocus systems
autofocus
systems
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 - Lifetime
Application number
GB9116121A
Other versions
GB9116121D0 (en
GB2258109A (en
Inventor
Morgan William Amos David
Clive Henry Gillard
Martin Rex Dorricott
Ian Norman Sheldon
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.)
Sony Broadcast and Communications Ltd
Sony Europe BV United Kingdom Branch
Original Assignee
Sony Broadcast and Communications Ltd
Sony United Kingdom Ltd
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 Sony Broadcast and Communications Ltd, Sony United Kingdom Ltd filed Critical Sony Broadcast and Communications Ltd
Priority to GB9116121A priority Critical patent/GB2258109B/en
Publication of GB9116121D0 publication Critical patent/GB9116121D0/en
Publication of GB2258109A publication Critical patent/GB2258109A/en
Application granted granted Critical
Publication of GB2258109B publication Critical patent/GB2258109B/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • G02B7/365—Systems for automatic generation of focusing signals using image sharpness techniques, e.g. image processing techniques for generating autofocus signals by analysis of the spatial frequency components of the image
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/60—Control of cameras or camera modules
    • H04N23/67—Focus control based on electronic image sensor signals
    • H04N23/673—Focus control based on electronic image sensor signals based on contrast or high frequency components of image signals, e.g. hill climbing method

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Automatic Focus Adjustment (AREA)
GB9116121A 1991-07-25 1991-07-25 Autofocus systems Expired - Lifetime GB2258109B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9116121A GB2258109B (en) 1991-07-25 1991-07-25 Autofocus systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9116121A GB2258109B (en) 1991-07-25 1991-07-25 Autofocus systems

Publications (3)

Publication Number Publication Date
GB9116121D0 GB9116121D0 (en) 1991-09-11
GB2258109A GB2258109A (en) 1993-01-27
GB2258109B true GB2258109B (en) 1995-05-17

Family

ID=10699002

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9116121A Expired - Lifetime GB2258109B (en) 1991-07-25 1991-07-25 Autofocus systems

Country Status (1)

Country Link
GB (1) GB2258109B (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7046407B2 (en) 2000-02-14 2006-05-16 3M Innovative Properties Company Diffractive color filter
US7113231B2 (en) 2000-02-14 2006-09-26 3M Innovative Properties Company Dot-sequential color display system
US7182463B2 (en) 2003-12-23 2007-02-27 3M Innovative Properties Company Pixel-shifting projection lens assembly to provide optical interlacing for increased addressability
EP2491452A4 (en) * 2009-10-19 2015-03-11 Ventana Med Syst Inc Imaging system and techniques
BR112014005012A2 (en) * 2011-09-09 2017-03-28 Ventana Med Syst Inc device and method for obtaining a focused image of a non-transient computer specimen and readable medium
US9854150B2 (en) * 2015-10-27 2017-12-26 Blackberry Limited Auto-focus control in a camera to prevent oscillation

Also Published As

Publication number Publication date
GB9116121D0 (en) 1991-09-11
GB2258109A (en) 1993-01-27

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Legal Events

Date Code Title Description
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
PE20 Patent expired after termination of 20 years

Expiry date: 20110724