FR2248531B1 - - Google Patents

Info

Publication number
FR2248531B1
FR2248531B1 FR7434593A FR7434593A FR2248531B1 FR 2248531 B1 FR2248531 B1 FR 2248531B1 FR 7434593 A FR7434593 A FR 7434593A FR 7434593 A FR7434593 A FR 7434593A FR 2248531 B1 FR2248531 B1 FR 2248531B1
Authority
FR
France
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
FR7434593A
Other languages
French (fr)
Other versions
FR2248531A1 (enrdf_load_stackoverflow
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.)
Pentax Corp
Original Assignee
Asahi Kogaku Kogyo Co 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 Asahi Kogaku Kogyo Co Ltd filed Critical Asahi Kogaku Kogyo Co Ltd
Publication of FR2248531A1 publication Critical patent/FR2248531A1/fr
Application granted granted Critical
Publication of FR2248531B1 publication Critical patent/FR2248531B1/fr
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
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/53—Means for automatic focusing, e.g. to compensate thermal effects
    • 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
    • G02B7/34—Systems for automatic generation of focusing signals using different areas in a pupil plane

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Focusing (AREA)
  • Automatic Focus Adjustment (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
FR7434593A 1973-10-17 1974-10-15 Expired FR2248531B1 (enrdf_load_stackoverflow)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11657673A JPS5067648A (enrdf_load_stackoverflow) 1973-10-17 1973-10-17

Publications (2)

Publication Number Publication Date
FR2248531A1 FR2248531A1 (enrdf_load_stackoverflow) 1975-05-16
FR2248531B1 true FR2248531B1 (enrdf_load_stackoverflow) 1981-08-07

Family

ID=14690522

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7434593A Expired FR2248531B1 (enrdf_load_stackoverflow) 1973-10-17 1974-10-15

Country Status (4)

Country Link
JP (1) JPS5067648A (enrdf_load_stackoverflow)
DE (1) DE2449538B2 (enrdf_load_stackoverflow)
FR (1) FR2248531B1 (enrdf_load_stackoverflow)
GB (1) GB1482793A (enrdf_load_stackoverflow)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2564215B1 (fr) * 1984-05-09 1987-07-17 Centre Nat Etd Spatiales Dispositif pour detecter et commander la mise au point d'un appareil de prise de vue

Also Published As

Publication number Publication date
JPS5067648A (enrdf_load_stackoverflow) 1975-06-06
FR2248531A1 (enrdf_load_stackoverflow) 1975-05-16
GB1482793A (en) 1977-08-17
DE2449538C3 (enrdf_load_stackoverflow) 1979-01-25
DE2449538B2 (de) 1978-05-24
DE2449538A1 (de) 1975-04-30

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Legal Events

Date Code Title Description
ST Notification of lapse