GB1142064A - Optical focusing arrangements - Google Patents

Optical focusing arrangements

Info

Publication number
GB1142064A
GB1142064A GB4758766A GB4758766A GB1142064A GB 1142064 A GB1142064 A GB 1142064A GB 4758766 A GB4758766 A GB 4758766A GB 4758766 A GB4758766 A GB 4758766A GB 1142064 A GB1142064 A GB 1142064A
Authority
GB
United Kingdom
Prior art keywords
lens
screen
photo
cell
output
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
GB4758766A
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.)
Bell and Howell Co
Original Assignee
Bell and Howell Co
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
Priority claimed from US504520A external-priority patent/US3398665A/en
Application filed by Bell and Howell Co filed Critical Bell and Howell Co
Publication of GB1142064A publication Critical patent/GB1142064A/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
    • G03B3/00—Focusing arrangements of general interest for cameras, projectors or printers
    • G03B3/10—Power-operated focusing
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/28—Systems for automatic generation of focusing signals
    • G02B7/36—Systems for automatic generation of focusing signals using image sharpness techniques, e.g. image processing techniques for generating autofocus signals
    • 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
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/53—Means for automatic focusing, e.g. to compensate thermal effects

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Optics & Photonics (AREA)
  • Stereoscopic And Panoramic Photography (AREA)
  • Photovoltaic Devices (AREA)
  • Focusing (AREA)
  • Automatic Focus Adjustment (AREA)
GB4758766A 1965-10-24 1966-10-24 Optical focusing arrangements Expired GB1142064A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US504520A US3398665A (en) 1965-10-24 1965-10-24 Lenticular screen autofocus system
US57608166A 1966-08-30 1966-08-30

Publications (1)

Publication Number Publication Date
GB1142064A true GB1142064A (en) 1969-02-05

Family

ID=27054850

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4758766A Expired GB1142064A (en) 1965-10-24 1966-10-24 Optical focusing arrangements

Country Status (4)

Country Link
JP (1) JPS5211593B1 (enExample)
AT (1) AT280774B (enExample)
DE (1) DE1547182A1 (enExample)
GB (1) GB1142064A (enExample)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2436528C2 (de) * 1974-07-29 1982-11-25 Ernst Leitz Wetzlar Gmbh, 6330 Wetzlar Elektro-optische Scharfstelleinrichtung

Also Published As

Publication number Publication date
AT280774B (de) 1970-04-27
JPS5211593B1 (enExample) 1977-03-31
DE1547182A1 (de) 1969-12-18

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