DE2447914C3 - Vorrichtung zur automatischen Erkennung des Fokussierzustandes - Google Patents

Vorrichtung zur automatischen Erkennung des Fokussierzustandes

Info

Publication number
DE2447914C3
DE2447914C3 DE19742447914 DE2447914A DE2447914C3 DE 2447914 C3 DE2447914 C3 DE 2447914C3 DE 19742447914 DE19742447914 DE 19742447914 DE 2447914 A DE2447914 A DE 2447914A DE 2447914 C3 DE2447914 C3 DE 2447914C3
Authority
DE
Germany
Prior art keywords
image
focus
medium
film
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
DE19742447914
Other languages
German (de)
English (en)
Other versions
DE2447914B2 (de
DE2447914A1 (de
Inventor
Philipp Gerhardt North Syracuse Kornreich
Stephen Thomas Liverpool Kowel
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.)
Research Corp
Original Assignee
Research Corp
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 Research Corp filed Critical Research Corp
Publication of DE2447914A1 publication Critical patent/DE2447914A1/de
Publication of DE2447914B2 publication Critical patent/DE2447914B2/de
Application granted granted Critical
Publication of DE2447914C3 publication Critical patent/DE2447914C3/de
Expired legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/28Systems for automatic generation of focusing signals
    • G02B7/36Systems for automatic generation of focusing signals using image sharpness techniques, e.g. image processing techniques for generating autofocus signals
    • G02B7/365Systems 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
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/40Optical focusing aids

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Focusing (AREA)
  • Automatic Focus Adjustment (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
  • Length Measuring Devices By Optical Means (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)
DE19742447914 1974-01-17 1974-10-08 Vorrichtung zur automatischen Erkennung des Fokussierzustandes Expired DE2447914C3 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US43410274A 1974-01-17 1974-01-17

Publications (3)

Publication Number Publication Date
DE2447914A1 DE2447914A1 (de) 1975-07-31
DE2447914B2 DE2447914B2 (de) 1979-07-12
DE2447914C3 true DE2447914C3 (de) 1980-03-20

Family

ID=23722844

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19742447914 Expired DE2447914C3 (de) 1974-01-17 1974-10-08 Vorrichtung zur automatischen Erkennung des Fokussierzustandes

Country Status (5)

Country Link
JP (1) JPS50104644A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
AT (1) AT370887B (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
CA (1) CA1021183A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
DE (1) DE2447914C3 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
GB (1) GB1480289A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5629215A (en) * 1979-08-15 1981-03-24 Konishiroku Photo Ind Co Ltd Focus detector
CN112762993B (zh) * 2020-12-29 2021-10-08 深圳市韦德勋光电科技有限公司 一种用于lcd逻辑板基板原材的探测装置及使用方法

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3689772A (en) * 1971-08-18 1972-09-05 Litton Systems Inc Photodetector light pattern detector

Also Published As

Publication number Publication date
CA1021183A (en) 1977-11-22
DE2447914B2 (de) 1979-07-12
AT370887B (de) 1983-05-10
DE2447914A1 (de) 1975-07-31
ATA821374A (de) 1982-05-15
GB1480289A (en) 1977-07-20
JPS50104644A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1975-08-18

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Legal Events

Date Code Title Description
C3 Grant after two publication steps (3rd publication)
8339 Ceased/non-payment of the annual fee