GB1562703A - Cameras having focusing screens - Google Patents

Cameras having focusing screens Download PDF

Info

Publication number
GB1562703A
GB1562703A GB34838/76A GB3483876A GB1562703A GB 1562703 A GB1562703 A GB 1562703A GB 34838/76 A GB34838/76 A GB 34838/76A GB 3483876 A GB3483876 A GB 3483876A GB 1562703 A GB1562703 A GB 1562703A
Authority
GB
United Kingdom
Prior art keywords
light
lens
screen
elements
image
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
GB34838/76A
Other languages
English (en)
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.)
Vivitar Corp
Original Assignee
Vivitar 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 Vivitar Corp filed Critical Vivitar Corp
Publication of GB1562703A publication Critical patent/GB1562703A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B13/00—Viewfinders; Focusing aids for cameras; Means for focusing for cameras; Autofocus systems for cameras
    • G03B13/18—Focusing aids
    • G03B13/24—Focusing screens

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Overhead Projectors And Projection Screens (AREA)
  • Optical Elements Other Than Lenses (AREA)
  • Viewfinders (AREA)
  • Lenses (AREA)
GB34838/76A 1975-08-21 1976-08-20 Cameras having focusing screens Expired GB1562703A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US60635075A 1975-08-21 1975-08-21

Publications (1)

Publication Number Publication Date
GB1562703A true GB1562703A (en) 1980-03-12

Family

ID=24427616

Family Applications (1)

Application Number Title Priority Date Filing Date
GB34838/76A Expired GB1562703A (en) 1975-08-21 1976-08-20 Cameras having focusing screens

Country Status (4)

Country Link
US (1) US4121234A (en:Method)
JP (1) JPS5238219A (en:Method)
DE (1) DE2637606A1 (en:Method)
GB (1) GB1562703A (en:Method)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5492232A (en) * 1977-12-28 1979-07-21 Canon Inc Camera
US5630001A (en) * 1995-05-22 1997-05-13 Motorola Image generator for use in image manifestation apparatus
USD760234S1 (en) * 2012-11-30 2016-06-28 Fujifilm Corporation Display screen for digital camera

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB188751A (en) * 1921-08-12 1922-11-13 William Edward Mcconnell Improvements in or connected with cinematograph and other lantern screens
US2213077A (en) * 1937-01-02 1940-08-27 Firm Of Fernseh Ag Transparent projection screen
US2323754A (en) * 1939-10-17 1943-07-06 Technicolor Motion Picture Illumination of photographic screens
GB675925A (en) * 1950-10-06 1952-07-16 Frederick Charles Sheffield Improvements in or relating to television receivers
US3133139A (en) * 1958-05-19 1964-05-12 George L Beers Directional glare reducing viewing device
DE1154713B (de) * 1960-07-07 1963-09-19 Voigtlaender Ag Einstellscheibe fuer Spiegelreflexkameras
US3274912A (en) * 1961-03-01 1966-09-27 Konishiroku Photo Ind Single-lens reflex camera
US3253500A (en) * 1964-05-11 1966-05-31 American Optical Corp Doubly clad light-conducting fibers with the outer cladding being partially light absorbing
US3498198A (en) * 1965-02-18 1970-03-03 Nippon Kogaku Kk Single reflex camera with interchangeable focussing screens
US3574582A (en) * 1965-05-17 1971-04-13 American Optical Corp Method for making fiber optical image-conducting devices embodying stray light-absorbing means
US3502389A (en) * 1967-12-05 1970-03-24 Edwin H Hilborn Screen for front surface projection
US3661065A (en) * 1968-02-08 1972-05-09 Yasuo Yamazaki Device for optical focusing a glass fiber plate as a focusing screen
US3703660A (en) * 1971-08-19 1972-11-21 Corning Glass Works Photochromic fiber optic image storage device
US3797910A (en) * 1971-09-14 1974-03-19 Corning Glass Works Fiber optic device having some fibers clad with absorbing glasses
US3913872A (en) * 1973-01-18 1975-10-21 Bell & Howell Co Light tunnel for uniformly illuminating an object

Also Published As

Publication number Publication date
US4121234A (en) 1978-10-17
DE2637606A1 (de) 1977-03-03
JPS614095B2 (en:Method) 1986-02-06
JPS5238219A (en) 1977-03-24

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee