GB2251999B - Automatic focusing device - Google Patents

Automatic focusing device

Info

Publication number
GB2251999B
GB2251999B GB9207063A GB9207063A GB2251999B GB 2251999 B GB2251999 B GB 2251999B GB 9207063 A GB9207063 A GB 9207063A GB 9207063 A GB9207063 A GB 9207063A GB 2251999 B GB2251999 B GB 2251999B
Authority
GB
United Kingdom
Prior art keywords
automatic focusing
focusing device
automatic
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 - Lifetime
Application number
GB9207063A
Other versions
GB2251999A (en
GB9207063D0 (en
Inventor
Kunihiko Yamada
Akihiro Fujiwara
Masamichi Toyama
Hirofumi Suda
Kitahiro Kaneda
Katsuji Yoshimura
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.)
Canon Inc
Original Assignee
Canon Inc
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
Priority claimed from JP62219670A external-priority patent/JP2659964B2/en
Priority claimed from JP62228993A external-priority patent/JP2713918B2/en
Priority claimed from JP63079814A external-priority patent/JPH01251878A/en
Priority claimed from GB9117963A external-priority patent/GB2247378B/en
Application filed by Canon Inc filed Critical Canon Inc
Publication of GB9207063D0 publication Critical patent/GB9207063D0/en
Publication of GB2251999A publication Critical patent/GB2251999A/en
Application granted granted Critical
Publication of GB2251999B publication Critical patent/GB2251999B/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
GB9207063A 1987-09-02 1992-03-31 Automatic focusing device Expired - Lifetime GB2251999B (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP62219670A JP2659964B2 (en) 1987-09-02 1987-09-02 Automatic focusing device
JP62228993A JP2713918B2 (en) 1987-09-12 1987-09-12 Automatic focusing device
JP63079814A JPH01251878A (en) 1988-03-30 1988-03-30 Automatic focusing device
GB9117963A GB2247378B (en) 1987-09-02 1991-08-20 Automatic focusing device

Publications (3)

Publication Number Publication Date
GB9207063D0 GB9207063D0 (en) 1992-05-13
GB2251999A GB2251999A (en) 1992-07-22
GB2251999B true GB2251999B (en) 1992-09-30

Family

ID=27450732

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9207063A Expired - Lifetime GB2251999B (en) 1987-09-02 1992-03-31 Automatic focusing device

Country Status (1)

Country Link
GB (1) GB2251999B (en)

Also Published As

Publication number Publication date
GB2251999A (en) 1992-07-22
GB9207063D0 (en) 1992-05-13

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Legal Events

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

Effective date: 20070826