AT370887B - DEVICE FOR MEASURING THE SHARPNESS OF AN IMAGE PROJECTED ONTO A MATERIAL - Google Patents

DEVICE FOR MEASURING THE SHARPNESS OF AN IMAGE PROJECTED ONTO A MATERIAL

Info

Publication number
AT370887B
AT370887B AT0821374A AT821374A AT370887B AT 370887 B AT370887 B AT 370887B AT 0821374 A AT0821374 A AT 0821374A AT 821374 A AT821374 A AT 821374A AT 370887 B AT370887 B AT 370887B
Authority
AT
Austria
Prior art keywords
sharpness
measuring
projected onto
image projected
image
Prior art date
Application number
AT0821374A
Other languages
German (de)
Other versions
ATA821374A (en
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 ATA821374A publication Critical patent/ATA821374A/en
Application granted granted Critical
Publication of AT370887B publication Critical patent/AT370887B/en

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
    • 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
AT0821374A 1974-01-17 1974-10-11 DEVICE FOR MEASURING THE SHARPNESS OF AN IMAGE PROJECTED ONTO A MATERIAL AT370887B (en)

Applications Claiming Priority (1)

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

Publications (2)

Publication Number Publication Date
ATA821374A ATA821374A (en) 1982-05-15
AT370887B true AT370887B (en) 1983-05-10

Family

ID=23722844

Family Applications (1)

Application Number Title Priority Date Filing Date
AT0821374A AT370887B (en) 1974-01-17 1974-10-11 DEVICE FOR MEASURING THE SHARPNESS OF AN IMAGE PROJECTED ONTO A MATERIAL

Country Status (5)

Country Link
JP (1) JPS50104644A (en)
AT (1) AT370887B (en)
CA (1) CA1021183A (en)
DE (1) DE2447914C3 (en)
GB (1) GB1480289A (en)

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 (en) * 2020-12-29 2021-10-08 深圳市韦德勋光电科技有限公司 Detection device for raw material of LCD logic board substrate and use method

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
DE2447914A1 (en) 1975-07-31
CA1021183A (en) 1977-11-22
ATA821374A (en) 1982-05-15
JPS50104644A (en) 1975-08-18
DE2447914B2 (en) 1979-07-12
DE2447914C3 (en) 1980-03-20
GB1480289A (en) 1977-07-20

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Legal Events

Date Code Title Description
ELJ Ceased due to non-payment of the annual fee