JPS574664A - Beam diameter measuring device of cathode-ray tube - Google Patents

Beam diameter measuring device of cathode-ray tube

Info

Publication number
JPS574664A
JPS574664A JP7954780A JP7954780A JPS574664A JP S574664 A JPS574664 A JP S574664A JP 7954780 A JP7954780 A JP 7954780A JP 7954780 A JP7954780 A JP 7954780A JP S574664 A JPS574664 A JP S574664A
Authority
JP
Japan
Prior art keywords
diameter
measured
cathode
beam spot
ray tube
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.)
Granted
Application number
JP7954780A
Other languages
Japanese (ja)
Other versions
JPS6151837B2 (en
Inventor
Kozo Nishimoto
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP7954780A priority Critical patent/JPS574664A/en
Publication of JPS574664A publication Critical patent/JPS574664A/en
Publication of JPS6151837B2 publication Critical patent/JPS6151837B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N17/00—Diagnosis, testing or measuring for television systems or their details
    • H04N17/04—Diagnosis, testing or measuring for television systems or their details for receivers

Landscapes

  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • General Health & Medical Sciences (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Measurement Of Radiation (AREA)
  • Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)
  • Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)
  • Details Of Television Scanning (AREA)

Abstract

PURPOSE:To realize an accurate measurement with a high workability for the beam diameter of a cathode-ray tube, by measuring the diameter of the beam spot by varying successively the beam current value with a switch. CONSTITUTION:The switches 6 and 8 are set at an optional position such as (a), and a bias power source 9 is controlled so that a voltage drop of 1V is caused across (a) of a resistance 7 to secure a light emission only for a display element 10M of a detection display circuit 10. In this case, the amplitude of the beam current is 200muA, and thus the diameter of the beam spot of that moment is measured through a microscope 3. Then the switches 6 and 8 are changed to another position, and the source 9 is controlled in the same way to set the amplitude of the dropped voltage at 1V across the resistance 7. Thus the beam current of that time can be set at a selected and prescribed level, and the diameter of the beam spot at that time is measured. Then the relation between the measured beam current and the diameter of the beam spot is plotted to decide whether or not the beam diameter is within an allowable range.
JP7954780A 1980-06-11 1980-06-11 Beam diameter measuring device of cathode-ray tube Granted JPS574664A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7954780A JPS574664A (en) 1980-06-11 1980-06-11 Beam diameter measuring device of cathode-ray tube

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7954780A JPS574664A (en) 1980-06-11 1980-06-11 Beam diameter measuring device of cathode-ray tube

Publications (2)

Publication Number Publication Date
JPS574664A true JPS574664A (en) 1982-01-11
JPS6151837B2 JPS6151837B2 (en) 1986-11-11

Family

ID=13693018

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7954780A Granted JPS574664A (en) 1980-06-11 1980-06-11 Beam diameter measuring device of cathode-ray tube

Country Status (1)

Country Link
JP (1) JPS574664A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110398768A (en) * 2019-07-15 2019-11-01 华中科技大学 A kind of beam spot dynamic monitoring method and system based on pixel ionisation chamber

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110398768A (en) * 2019-07-15 2019-11-01 华中科技大学 A kind of beam spot dynamic monitoring method and system based on pixel ionisation chamber

Also Published As

Publication number Publication date
JPS6151837B2 (en) 1986-11-11

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