JPS55141043A - Projection type cathode-ray tube - Google Patents

Projection type cathode-ray tube

Info

Publication number
JPS55141043A
JPS55141043A JP4934379A JP4934379A JPS55141043A JP S55141043 A JPS55141043 A JP S55141043A JP 4934379 A JP4934379 A JP 4934379A JP 4934379 A JP4934379 A JP 4934379A JP S55141043 A JPS55141043 A JP S55141043A
Authority
JP
Japan
Prior art keywords
meniscus lens
ray tube
screen
projection type
type cathode
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.)
Pending
Application number
JP4934379A
Other languages
Japanese (ja)
Inventor
Takashi Sugawara
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric 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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP4934379A priority Critical patent/JPS55141043A/en
Publication of JPS55141043A publication Critical patent/JPS55141043A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
    • H01J29/86—Vessels; Containers; Vacuum locks
    • H01J29/89—Optical or photographic arrangements structurally combined or co-operating with the vessel
    • H01J29/894—Arrangements combined with the vessel for the purpose of image projection on a screen

Abstract

PURPOSE:To adjust focal length by providing an adjusting member which adjusts the relative distance between a reflecting mirror and a meniscus lens. CONSTITUTION:The end of the meniscus lens 5 is contacted on the adjusting screw 5e and is pressed and retained by the screw 9 which is mounted on the cut-set up piece 8d of the holder 8. Then the reflecting mirror 4 is pressed and retained on the end of the cylindrical area 8a in the holder 8 by the bowl-shaped metal fixture 10 and the spring 11. The picture image on the fluorescent screen target 3 is projected on the screen through the meniscus lens 5. By revolving a number of adjusting screws 8e and reciprocating the meniscus lens 5, the picture image on the screen is adjusted so as to clearly be focussed.
JP4934379A 1979-04-20 1979-04-20 Projection type cathode-ray tube Pending JPS55141043A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4934379A JPS55141043A (en) 1979-04-20 1979-04-20 Projection type cathode-ray tube

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4934379A JPS55141043A (en) 1979-04-20 1979-04-20 Projection type cathode-ray tube

Publications (1)

Publication Number Publication Date
JPS55141043A true JPS55141043A (en) 1980-11-04

Family

ID=12828349

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4934379A Pending JPS55141043A (en) 1979-04-20 1979-04-20 Projection type cathode-ray tube

Country Status (1)

Country Link
JP (1) JPS55141043A (en)

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