GB978551A - System for the removal of the line structure of television pictures and method of making the same - Google Patents

System for the removal of the line structure of television pictures and method of making the same

Info

Publication number
GB978551A
GB978551A GB4394260A GB4394260A GB978551A GB 978551 A GB978551 A GB 978551A GB 4394260 A GB4394260 A GB 4394260A GB 4394260 A GB4394260 A GB 4394260A GB 978551 A GB978551 A GB 978551A
Authority
GB
United Kingdom
Prior art keywords
grooves
cathode
spacing
ray tube
given
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
GB4394260A
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.)
SABA Schwarzwaelder Apparate Bau Anstalt August Schwer Soehne GmbH
Original Assignee
SABA Schwarzwaelder Apparate Bau Anstalt August Schwer Soehne GmbH
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 SABA Schwarzwaelder Apparate Bau Anstalt August Schwer Soehne GmbH filed Critical SABA Schwarzwaelder Apparate Bau Anstalt August Schwer Soehne GmbH
Publication of GB978551A publication Critical patent/GB978551A/en
Expired 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
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/02—Diffusing elements; Afocal elements
    • G02B5/0205—Diffusing elements; Afocal elements characterised by the diffusing properties
    • G02B5/021—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place at the element's surface, e.g. by means of surface roughening or microprismatic structures
    • G02B5/0221—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place at the element's surface, e.g. by means of surface roughening or microprismatic structures the surface having an irregular structure
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/02—Diffusing elements; Afocal elements
    • G02B5/0205—Diffusing elements; Afocal elements characterised by the diffusing properties
    • G02B5/0252—Diffusing elements; Afocal elements characterised by the diffusing properties using holographic or diffractive means
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/02—Diffusing elements; Afocal elements
    • G02B5/0273—Diffusing elements; Afocal elements characterized by the use
    • G02B5/0278—Diffusing elements; Afocal elements characterized by the use used in transmission
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/02—Diffusing elements; Afocal elements
    • G02B5/0273—Diffusing elements; Afocal elements characterized by the use
    • G02B5/0294—Diffusing elements; Afocal elements characterized by the use adapted to provide an additional optical effect, e.g. anti-reflection or filter
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/72—Modifying the appearance of television pictures by optical filters or diffusing screens

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Optical Recording Or Reproduction (AREA)
  • Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
  • Laminated Bodies (AREA)

Abstract

978,551. Television. SABA SCHWARZWALDER APPARATE - BAU ANSTALT AUGUST SCHWER SOHNE G.m.b.H. Dec. 21, 1960 [Dec. 21, 1959; March 31, 1960; Sept. 3, 1960; Oct. 12, 1960], No. 43942/60. Drawings to Specification. Heading H4F. [Also in Divisions G2 and H1] An optical device for eliminating the line structure of a television picture raster produced by a cathode-ray tube comprises a transparent member disposed between the view and fluorescent screen of the tube and formed with a plurality of grooves extending parallel to the line structure and spaced closer than the spacing between raster lines, the grooves being arranged that each spot of the picture is magnified so that the luminous densities of adjacent raster lines as magnified overlap. The device may be: (1) a separate plate adhered to the front face of the cathode-ray tube, e.g. by " Canada balsam," (2) a plate also functioning as a protective plate which is mounted in front of the cathode-ray tube, (3) the front face of the cathode-ray tube itself, or (4) in the form of spectacles to be worn by the viewer. Reference is made to the use of colour additives to improve contrast. Where the device is used close to the fluorescent screen, the grooves are given a spacing of <SP>1</SP>/ 5 -<SP>1</SP>/ 20 of the raster line spacing and a depth of about <SP>1</SP>/ 10 of the spacing. Grooves of <SP>1</SP>/ 10 mm. spacing are mentioned in connection with a device for use with 17-inch- 24-inch cathode-ray tubes. The device may be formed of glass or plastic. The device may also be formed with grooves extending transverse the line direction so as to form a " lattice " plate, the vertical grooves having a depth different from that of the horizontal grooves. It is stated that the grooves may be of any configuration, description being given of arrangements formed with cylindrical surfaces, parabolic surfaces and sinusoidal surfaces composed of one, two or three sine waves of a different wavelength. The surfaces may also be given a random characteristic by cutting the grooves with sandpaper or by a tool controlled to effect variable depth and/or lateral position modulation of parabolic grooves in response to a noise signal. The device may be formed so that the grooved surface is formed at the boundary between two materials of different refractive index. In order to manufacture such a device, one material is selected to have a higher softening point than the other and is used as master pattern on which the other material is pressed or cast. Such arrangements are referred so in connection with spectacles. Specifications 744,648 and 886,439 are referred to.
GB4394260A 1959-12-12 1960-12-21 System for the removal of the line structure of television pictures and method of making the same Expired GB978551A (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DES0066363 1959-12-12
DES67860A DE1194443B (en) 1959-12-12 1960-03-31 Optical arrangement for eliminating the line structure in television receivers
DES70206A DE1135953B (en) 1959-12-12 1960-09-03 Optical shutter to remove the line structure of television pictures
DES70837A DE1148585B (en) 1959-12-12 1960-10-12 Device for eliminating the line structure in television pictures by means of transparent pulleys

Publications (1)

Publication Number Publication Date
GB978551A true GB978551A (en) 1964-12-23

Family

ID=27437513

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4394260A Expired GB978551A (en) 1959-12-12 1960-12-21 System for the removal of the line structure of television pictures and method of making the same

Country Status (4)

Country Link
CH (1) CH422865A (en)
DE (3) DE1194443B (en)
GB (1) GB978551A (en)
NL (2) NL6617763A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0133440A1 (en) * 1982-12-28 1985-02-27 Sony Corporation Projection television receiver

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE444702C (en) * 1926-01-09 1927-05-25 Rodolphe Berthon Film for color photographic recordings and projections, in which the carrier of the light-sensitive layer is covered with microscopic light-refracting elements
US2354591A (en) * 1941-11-29 1944-07-25 Rca Corp Television apparatus
US2605434A (en) * 1949-12-08 1952-07-29 John H Homrighous Single beam three color cathoderay tube
US2728013A (en) * 1952-09-19 1955-12-20 Rca Corp Line structure elimination in cathode ray tubes
DE1807950U (en) * 1959-12-21 1960-03-17 Saba Gmbh ARRANGEMENT FOR THE ELIMINATION OF THE LINE STRUCTURE IN TELEVISION TUBES.
DE1792050A1 (en) * 1968-07-16 1971-10-14 Gestrich Rabe Werner Dipl Ing Process for the manufacture of an agent for combating tumor diseases

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0133440A1 (en) * 1982-12-28 1985-02-27 Sony Corporation Projection television receiver
EP0133440A4 (en) * 1982-12-28 1985-07-01 Sony Corp Projection television receiver.

Also Published As

Publication number Publication date
CH422865A (en) 1966-10-31
DE1194443B (en) 1965-06-10
DE1148585B (en) 1963-05-16
DE1135953B (en) 1962-09-06
NL6617762A (en) 1967-02-27
NL6617763A (en) 1967-02-27

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