CA998270A - Correcting lens for color cathode ray tubes - Google Patents

Correcting lens for color cathode ray tubes

Info

Publication number
CA998270A
CA998270A CA183,372A CA183372A CA998270A CA 998270 A CA998270 A CA 998270A CA 183372 A CA183372 A CA 183372A CA 998270 A CA998270 A CA 998270A
Authority
CA
Canada
Prior art keywords
cathode ray
color cathode
ray tubes
correcting lens
correcting
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
CA183,372A
Other languages
English (en)
Other versions
CA183372S (en
Inventor
Albert M. Morrell
Frans Van Hekken
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.)
RCA Corp
Original Assignee
RCA 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 RCA Corp filed Critical RCA Corp
Application granted granted Critical
Publication of CA998270A publication Critical patent/CA998270A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Formation Of Various Coating Films On Cathode Ray Tubes And Lamps (AREA)
  • Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)
CA183,372A 1972-10-18 1973-10-15 Correcting lens for color cathode ray tubes Expired CA998270A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00298642A US3811754A (en) 1972-10-18 1972-10-18 Correcting lens

Publications (1)

Publication Number Publication Date
CA998270A true CA998270A (en) 1976-10-12

Family

ID=23151399

Family Applications (1)

Application Number Title Priority Date Filing Date
CA183,372A Expired CA998270A (en) 1972-10-18 1973-10-15 Correcting lens for color cathode ray tubes

Country Status (9)

Country Link
US (1) US3811754A (it)
JP (1) JPS4975155A (it)
AU (1) AU472436B2 (it)
BE (1) BE806154A (it)
CA (1) CA998270A (it)
FR (1) FR2203984B1 (it)
GB (1) GB1450589A (it)
IT (1) IT995546B (it)
NL (1) NL7314290A (it)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4979255A (it) * 1972-12-04 1974-07-31
DE3305979A1 (de) * 1983-02-21 1984-08-23 Richard 8901 Neusäß Wallner Lichtverdichter
US4830481A (en) * 1988-08-12 1989-05-16 Minnesota Mining And Manufacturing Company Multifocal diffractive lens
CA2774234A1 (en) 2009-09-18 2011-03-24 Koninklijke Philips Electronics N.V. Luminaire and optical component

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1952237A (en) * 1930-11-24 1934-03-27 Ylla-Conte Jose Lens for the concentration of solar heat
GB791312A (en) * 1953-03-26 1958-02-26 Theodore Hendrik Nakken Photographic objectives
US2999126A (en) * 1958-05-29 1961-09-05 Harries Television Res Ltd Facetted correction lens for minimizing keystoning of off-axis projectors
US3495511A (en) * 1967-10-05 1970-02-17 Nat Video Corp Heterogeneous lens for forming phosphor patterns on color kinescope
US3628850A (en) * 1970-02-24 1971-12-21 Hitachi Ltd Correcting lens
JPS4918572A (it) * 1972-06-14 1974-02-19

Also Published As

Publication number Publication date
US3811754A (en) 1974-05-21
FR2203984A1 (it) 1974-05-17
GB1450589A (en) 1976-09-22
DE2352363A1 (de) 1974-05-09
NL7314290A (it) 1974-04-22
AU6081073A (en) 1975-03-27
DE2352363B2 (de) 1976-04-15
JPS4975155A (it) 1974-07-19
FR2203984B1 (it) 1976-05-07
AU472436B2 (en) 1976-05-27
IT995546B (it) 1975-11-20
BE806154A (fr) 1974-02-15

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