CA941514A - Automatic beam focusing system - Google Patents

Automatic beam focusing system

Info

Publication number
CA941514A
CA941514A CA108,878A CA108878A CA941514A CA 941514 A CA941514 A CA 941514A CA 108878 A CA108878 A CA 108878A CA 941514 A CA941514 A CA 941514A
Authority
CA
Canada
Prior art keywords
focusing system
beam focusing
automatic beam
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
Application number
CA108,878A
Other languages
English (en)
Inventor
Harold L. Peterson
Henry Ball
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.)
RCA Corp
Original Assignee
RCA 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 RCA Corp filed Critical RCA Corp
Application granted granted Critical
Publication of CA941514A publication Critical patent/CA941514A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N3/00—Scanning details of television systems; Combination thereof with generation of supply voltages
    • H04N3/10—Scanning details of television systems; Combination thereof with generation of supply voltages by means not exclusively optical-mechanical
    • H04N3/16—Scanning details of television systems; Combination thereof with generation of supply voltages by means not exclusively optical-mechanical by deflecting electron beam in cathode-ray tube, e.g. scanning corrections
    • H04N3/26—Modifications of scanning arrangements to improve focusing

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Automatic Focus Adjustment (AREA)
  • Color Television Image Signal Generators (AREA)
  • Video Image Reproduction Devices For Color Tv Systems (AREA)
  • Details Of Television Scanning (AREA)
CA108,878A 1970-04-15 1971-03-26 Automatic beam focusing system Expired CA941514A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US2864770A 1970-04-15 1970-04-15

Publications (1)

Publication Number Publication Date
CA941514A true CA941514A (en) 1974-02-05

Family

ID=21844634

Family Applications (1)

Application Number Title Priority Date Filing Date
CA108,878A Expired CA941514A (en) 1970-04-15 1971-03-26 Automatic beam focusing system

Country Status (9)

Country Link
US (1) US3647952A (fr)
JP (1) JPS5121528B1 (fr)
BE (1) BE765688A (fr)
CA (1) CA941514A (fr)
DE (1) DE2118302C3 (fr)
FR (1) FR2086073B1 (fr)
GB (1) GB1307350A (fr)
NL (1) NL7104969A (fr)
SE (1) SE371069B (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3816848A (en) * 1972-03-29 1974-06-11 Magnavox Co Automatic focus control for image pickup devices
US3875585A (en) * 1972-06-01 1975-04-01 Magnavox Co Cathode ray tube focussing system
US4387394A (en) * 1980-12-31 1983-06-07 Rca Corporation Sensing focus of a color kinescope
JPS57193185A (en) * 1981-05-25 1982-11-27 Toshiba Corp Automatic focus controlling circuit for electron beam of image pickup tube
US4459614A (en) * 1981-12-24 1984-07-10 Ampex Corporation Rotation-free electrical focussing circuit for television image tubes
DE3514219A1 (de) * 1985-04-19 1986-10-23 Standard Elektrik Lorenz Ag, 7000 Stuttgart Schaltungsanordnung in einem videorecorder zum verbessern der bildschaerfe
JPH05299048A (ja) * 1992-04-24 1993-11-12 Hitachi Ltd 電子線装置および走査電子顕微鏡

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2472165A (en) * 1947-04-29 1949-06-07 Philco Corp Automatic focus control for cathode-ray tubes
US2939042A (en) * 1958-01-16 1960-05-31 Thompson Ramo Wooldridge Inc Automatic focusing circuit
GB1171461A (en) * 1965-09-23 1969-11-19 Ass Elect Ind Improvements relating to the Focussing of Microscopes
JPS459617Y1 (fr) * 1968-12-17 1970-05-06

Also Published As

Publication number Publication date
SE371069B (fr) 1974-11-04
DE2118302A1 (de) 1971-10-28
BE765688A (fr) 1971-08-30
GB1307350A (en) 1973-02-21
NL7104969A (fr) 1971-10-19
US3647952A (en) 1972-03-07
JPS5121528B1 (fr) 1976-07-03
DE2118302B2 (de) 1973-04-19
FR2086073A1 (fr) 1971-12-31
DE2118302C3 (de) 1973-11-08
FR2086073B1 (fr) 1975-07-04

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