GB1323540A - Correcting lens used to form fluorescent screens of colour television - Google Patents

Correcting lens used to form fluorescent screens of colour television

Info

Publication number
GB1323540A
GB1323540A GB913072A GB913072A GB1323540A GB 1323540 A GB1323540 A GB 1323540A GB 913072 A GB913072 A GB 913072A GB 913072 A GB913072 A GB 913072A GB 1323540 A GB1323540 A GB 1323540A
Authority
GB
United Kingdom
Prior art keywords
lens used
correcting lens
colour television
fluorescent screens
form fluorescent
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
GB913072A
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Publication of GB1323540A publication Critical patent/GB1323540A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B3/00—Simple or compound lenses
    • G02B3/02—Simple or compound lenses with non-spherical faces
    • G02B3/08—Simple or compound lenses with non-spherical faces with discontinuous faces, e.g. Fresnel lens
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
    • H01J9/20—Manufacture of screens on or from which an image or pattern is formed, picked up, converted or stored; Applying coatings to the vessel
    • H01J9/22—Applying luminescent coatings
    • H01J9/227—Applying luminescent coatings with luminescent material discontinuously arranged, e.g. in dots or lines
    • H01J9/2271—Applying luminescent coatings with luminescent material discontinuously arranged, e.g. in dots or lines by photographic processes
    • H01J9/2272—Devices for carrying out the processes, e.g. light houses
    • H01J9/2273—Auxiliary lenses and filters

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Formation Of Various Coating Films On Cathode Ray Tubes And Lamps (AREA)
  • Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)

Abstract

1323540 Cathode ray tubes HITACHI Ltd 28 Feb 1972 [5 March 1971] 9130/72 Heading HID [Also in Division G2] A correction lens for the photographic production of the phosphor dots or lines on a colour T.V. tube is made in known manner with correcting surfaces A 1 , A 2 , - joined by surfaces D 1 , D 2 , -. To avoid false focusing by surfaces D 1 , D 2 , - they are covered with a translucent or opaque coating 7.
GB913072A 1971-03-05 1972-02-28 Correcting lens used to form fluorescent screens of colour television Expired GB1323540A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1971013665U JPS4721552U (en) 1971-03-05 1971-03-05

Publications (1)

Publication Number Publication Date
GB1323540A true GB1323540A (en) 1973-07-18

Family

ID=11839482

Family Applications (1)

Application Number Title Priority Date Filing Date
GB913072A Expired GB1323540A (en) 1971-03-05 1972-02-28 Correcting lens used to form fluorescent screens of colour television

Country Status (4)

Country Link
US (1) US3784282A (en)
JP (1) JPS4721552U (en)
FR (1) FR2128352B1 (en)
GB (1) GB1323540A (en)

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49145455U (en) * 1973-04-12 1974-12-16
US3782253A (en) * 1973-05-02 1974-01-01 Rca Corp Color television picture tube screening method
US3953209A (en) * 1973-08-20 1976-04-27 Rca Corporation Method for preparing supplemental filter for lighthouse
JPS542612Y2 (en) * 1973-11-10 1979-02-03
JPS5712961B2 (en) * 1974-03-15 1982-03-13
JPS50125755A (en) * 1974-03-19 1975-10-03
JPS522314U (en) * 1975-06-24 1977-01-08
US4609266A (en) * 1982-06-07 1986-09-02 Roxor Corporation Elimination of internal reflections and diffractions from junctures in and at the periphery of, a segmented mirror
US4630905A (en) * 1981-02-10 1986-12-23 Roxor Corporation Elimination of internal reflections and diffractions from junctures in, and at the periphery of, a segmented mirror
IT1150272B (en) * 1982-03-11 1986-12-10 Siv Soc Italiana Vetro PRISM REFRACTOR SUITABLE FOR CONCENTRATING SOLAR ENERGY, ON AN APPROPRIATE COLLECTION PLAN, REMAINING IN A FIXED POSITION OVER TIME
US4621898A (en) * 1983-03-17 1986-11-11 Allied Corporation Directional optical filter
JPS6077941U (en) * 1983-11-02 1985-05-31 三菱電機株式会社 Air conditioner piping connection structure
JPS60113475U (en) * 1984-01-05 1985-07-31 三菱重工業株式会社 air conditioner
US4674850A (en) * 1984-08-20 1987-06-23 Roxor Corporation Elimination of internal reflections and diffractions from junctures in, and at the periphery of, a segmented mirror
US4632524A (en) * 1984-08-20 1986-12-30 Roxor Corporation Elimination of internal reflections and diffractions from junctures in, and at the periphery of a segmented mirror
US4641933A (en) * 1984-08-20 1987-02-10 Roxor Corporation Elimination of internal reflections and diffractions from junctures in, and at the periphery of, a segmented mirror
JPH0637362Y2 (en) * 1987-02-09 1994-09-28 カシオ計算機株式会社 LCD projector
US5751387A (en) * 1995-07-28 1998-05-12 Fujitsu Limited Fresnel lens and liquid crystal display device
US6380994B1 (en) 1995-07-28 2002-04-30 Fujitsu Limited Fresnel lens and liquid crystal display device
US5801889A (en) * 1995-08-16 1998-09-01 Eastman Kodak Company Technique to eliminate scattered light in diffractive optical elements
US6310733B1 (en) * 1996-08-16 2001-10-30 Eugene Dolgoff Optical elements and methods for their manufacture

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3134021A (en) * 1959-08-01 1964-05-19 Zeiss Ikon Ag Photoelectric exposure meters with light ray limiters
US3385184A (en) * 1964-03-19 1968-05-28 Rca Corp Optical system for use in making color-phosphor mosaic screens
US3279340A (en) * 1964-03-19 1966-10-18 Rca Corp Art of making color-phosphor mosaic screens
US3628850A (en) * 1970-02-24 1971-12-21 Hitachi Ltd Correcting lens

Also Published As

Publication number Publication date
US3784282A (en) 1974-01-08
JPS4721552U (en) 1972-11-10
FR2128352B1 (en) 1975-10-24
DE2210727B2 (en) 1977-06-16
FR2128352A1 (en) 1972-10-20
DE2210727A1 (en) 1972-09-14

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
435 Patent endorsed 'licences of right' on the date specified (sect. 35/1949)
PCNP Patent ceased through non-payment of renewal fee