JPS55141030A - Manufacturing method of projection type cathode-ray tube - Google Patents

Manufacturing method of projection type cathode-ray tube

Info

Publication number
JPS55141030A
JPS55141030A JP4934479A JP4934479A JPS55141030A JP S55141030 A JPS55141030 A JP S55141030A JP 4934479 A JP4934479 A JP 4934479A JP 4934479 A JP4934479 A JP 4934479A JP S55141030 A JPS55141030 A JP S55141030A
Authority
JP
Japan
Prior art keywords
reflecting mirror
spacer
meniscus lens
manufacturing
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.)
Pending
Application number
JP4934479A
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 JP4934479A priority Critical patent/JPS55141030A/en
Publication of JPS55141030A publication Critical patent/JPS55141030A/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

Landscapes

  • Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)

Abstract

PURPOSE:To easily obtain the same focal length by revolving plural adjusting screws so that each end of a spacer can touch the optical surface of a reflecting mirror and a meniscus lens in the same way by sliding the spacer in the axial direction. CONSTITUTION:The end of the meniscus lens 5 is pressed on the adjusting screw 8e of the holder 8 through the spring 10 and the reflecting mirror 4 is held on the end of the cylindrical area 8a in the holder 8 with the bowl-shaped metal fixture 11 and the spring 12. Plural adjusting screws 8e are revolved so that the optical surface of the reflecting mirror 4 and the meniscus lens 5 can touch all the circumferential surface of each end of the cylindrical spacer 9 and the image on the fluorescent screen target 3 be focussed on the screen.
JP4934479A 1979-04-20 1979-04-20 Manufacturing method of projection type cathode-ray tube Pending JPS55141030A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4934479A JPS55141030A (en) 1979-04-20 1979-04-20 Manufacturing method of projection type cathode-ray tube

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4934479A JPS55141030A (en) 1979-04-20 1979-04-20 Manufacturing method of projection type cathode-ray tube

Publications (1)

Publication Number Publication Date
JPS55141030A true JPS55141030A (en) 1980-11-04

Family

ID=12828379

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4934479A Pending JPS55141030A (en) 1979-04-20 1979-04-20 Manufacturing method of projection type cathode-ray tube

Country Status (1)

Country Link
JP (1) JPS55141030A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4660955A (en) * 1983-11-08 1987-04-28 Minolta Camera Kabushiki Kaisha Focus condition detecting device for use in a camera

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4660955A (en) * 1983-11-08 1987-04-28 Minolta Camera Kabushiki Kaisha Focus condition detecting device for use in a camera

Similar Documents

Publication Publication Date Title
US4365869A (en) Large-screen visualization device
US2670656A (en) Telescope
EP0152181A3 (en) Monitoring apparatus
JPS54126051A (en) Anamorphic f lens system
JPS56133756A (en) Optical device for variable magnification copying capable of size enlarging and reducing
GB1372462A (en) Overhead slide projector
US4387968A (en) Zoom lens mount barrel
JPS55141030A (en) Manufacturing method of projection type cathode-ray tube
US3094581A (en) Zoom projection lens
JPS57186738A (en) Lens barrel having incorporated motor
JPS55141043A (en) Projection type cathode-ray tube
JPS5933012U (en) zoom lens barrel
JPS5559410A (en) Zoom lens barrel which permits operation in two kinds of directions
JPS569942A (en) Projection cathode-ray tube
GB977059A (en) Improvements relating to optical inspection apparatus
JPS5454057A (en) Projecting apparatus
US3622222A (en) Apparatus for scanning photographic negatives
FR2255620A1 (en) Variable focus lens for TV cameras - gives uniform high contrast over whole image field even at extreme edges
ES8202466A1 (en) Play-free focusing mechanism for a television camera
JPS52111736A (en) Scanning optical system with information beam take-out element
SU1739335A1 (en) Varifocal lens
SU714343A1 (en) Device for shaping moving object image
JPS61102618A (en) Dark-field lighting apparatus
SU1583910A1 (en) Mirror lens
JPS5450344A (en) Optical scanner