DE2967483D1 - Focus servo system and focussing method - Google Patents

Focus servo system and focussing method

Info

Publication number
DE2967483D1
DE2967483D1 DE8181200102T DE2967483T DE2967483D1 DE 2967483 D1 DE2967483 D1 DE 2967483D1 DE 8181200102 T DE8181200102 T DE 8181200102T DE 2967483 T DE2967483 T DE 2967483T DE 2967483 D1 DE2967483 D1 DE 2967483D1
Authority
DE
Germany
Prior art keywords
servo system
focus servo
focussing method
focussing
focus
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
DE8181200102T
Other languages
German (de)
Inventor
Ludwig Ceshkovsky
Wayne Ray Dakin
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.)
Discovision Associates
Original Assignee
Discovision Associates
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 Discovision Associates filed Critical Discovision Associates
Priority claimed from EP79300489A external-priority patent/EP0004476B1/en
Application granted granted Critical
Publication of DE2967483D1 publication Critical patent/DE2967483D1/en
Expired legal-status Critical Current

Links

DE8181200102T 1978-03-27 1979-03-27 Focus servo system and focussing method Expired DE2967483D1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US89067078A 1978-03-27 1978-03-27
EP79300489A EP0004476B1 (en) 1978-03-27 1979-03-27 Time base error correction for optical disc players

Publications (1)

Publication Number Publication Date
DE2967483D1 true DE2967483D1 (en) 1985-08-14

Family

ID=26077995

Family Applications (4)

Application Number Title Priority Date Filing Date
DE8181200103T Expired DE2967403D1 (en) 1978-03-27 1979-03-27 Disc spindle servo system
DE8181200101T Expired DE2967471D1 (en) 1978-03-27 1979-03-27 Signal correction system and method
DE8181200104T Expired DE2967511D1 (en) 1978-03-27 1979-03-27 Optical tracking method and system
DE8181200102T Expired DE2967483D1 (en) 1978-03-27 1979-03-27 Focus servo system and focussing method

Family Applications Before (3)

Application Number Title Priority Date Filing Date
DE8181200103T Expired DE2967403D1 (en) 1978-03-27 1979-03-27 Disc spindle servo system
DE8181200101T Expired DE2967471D1 (en) 1978-03-27 1979-03-27 Signal correction system and method
DE8181200104T Expired DE2967511D1 (en) 1978-03-27 1979-03-27 Optical tracking method and system

Country Status (1)

Country Link
DE (4) DE2967403D1 (en)

Also Published As

Publication number Publication date
DE2967403D1 (en) 1985-04-11
DE2967511D1 (en) 1985-10-17
DE2967471D1 (en) 1985-07-25

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8320 Willingness to grant licences declared (paragraph 23)
8339 Ceased/non-payment of the annual fee