JPS55141030A - Manufacturing method of projection type cathode-ray tube - Google Patents
Manufacturing method of projection type cathode-ray tubeInfo
- 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
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.
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)
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 |
-
1979
- 1979-04-20 JP JP4934479A patent/JPS55141030A/en active Pending
Cited By (1)
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 |
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