FR2255620A1 - Variable focus lens for TV cameras - gives uniform high contrast over whole image field even at extreme edges - Google Patents

Variable focus lens for TV cameras - gives uniform high contrast over whole image field even at extreme edges

Info

Publication number
FR2255620A1
FR2255620A1 FR7441822A FR7441822A FR2255620A1 FR 2255620 A1 FR2255620 A1 FR 2255620A1 FR 7441822 A FR7441822 A FR 7441822A FR 7441822 A FR7441822 A FR 7441822A FR 2255620 A1 FR2255620 A1 FR 2255620A1
Authority
FR
France
Prior art keywords
variable focus
cameras
focus lens
high contrast
image field
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.)
Granted
Application number
FR7441822A
Other languages
English (en)
French (fr)
Other versions
FR2255620B1 (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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of FR2255620A1 publication Critical patent/FR2255620A1/fr
Application granted granted Critical
Publication of FR2255620B1 publication Critical patent/FR2255620B1/fr
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B15/00—Optical objectives with means for varying the magnification
    • G02B15/14—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective
    • G02B15/22—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective with movable lens means specially adapted for focusing at close distances

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Lenses (AREA)
  • Picture Signal Circuits (AREA)
FR7441822A 1973-12-20 1974-12-18 Variable focus lens for TV cameras - gives uniform high contrast over whole image field even at extreme edges Granted FR2255620A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT1067473A AT323440B (de) 1973-12-20 1973-12-20 Pankratisches objektiv

Publications (2)

Publication Number Publication Date
FR2255620A1 true FR2255620A1 (en) 1975-07-18
FR2255620B1 FR2255620B1 (enrdf_load_stackoverflow) 1978-06-23

Family

ID=3623936

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7441822A Granted FR2255620A1 (en) 1973-12-20 1974-12-18 Variable focus lens for TV cameras - gives uniform high contrast over whole image field even at extreme edges

Country Status (5)

Country Link
JP (1) JPS5098340A (enrdf_load_stackoverflow)
AT (1) AT323440B (enrdf_load_stackoverflow)
CH (1) CH572629A5 (enrdf_load_stackoverflow)
DE (1) DE2459865A1 (enrdf_load_stackoverflow)
FR (1) FR2255620A1 (enrdf_load_stackoverflow)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59181313A (ja) * 1983-03-17 1984-10-15 Konishiroku Photo Ind Co Ltd ズ−ムレンズ
JPS6011812A (ja) * 1983-06-30 1985-01-22 Asahi Optical Co Ltd バツクフオ−カスの長いズ−ムレンズ
JPS60133412A (ja) * 1983-12-22 1985-07-16 Matsushita Electric Ind Co Ltd ズ−ムレンズ
JPS615223A (ja) * 1984-06-19 1986-01-11 Matsushita Electric Ind Co Ltd 画面抱括範囲の広いズ−ムレンズ

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5540851B2 (enrdf_load_stackoverflow) * 1972-08-29 1980-10-21

Also Published As

Publication number Publication date
JPS5098340A (enrdf_load_stackoverflow) 1975-08-05
CH572629A5 (enrdf_load_stackoverflow) 1976-02-13
DE2459865A1 (de) 1975-07-03
AT323440B (de) 1975-07-10
FR2255620B1 (enrdf_load_stackoverflow) 1978-06-23

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Legal Events

Date Code Title Description
ST Notification of lapse