GB642888A - Improvements in photographic cameras and film projectors - Google Patents

Improvements in photographic cameras and film projectors

Info

Publication number
GB642888A
GB642888A GB11001/46A GB1100146A GB642888A GB 642888 A GB642888 A GB 642888A GB 11001/46 A GB11001/46 A GB 11001/46A GB 1100146 A GB1100146 A GB 1100146A GB 642888 A GB642888 A GB 642888A
Authority
GB
United Kingdom
Prior art keywords
photographic cameras
film projectors
projectors
film
photographic
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
GB11001/46A
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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 Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Publication of GB642888A publication Critical patent/GB642888A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B17/00—Systems with reflecting surfaces, with or without refracting elements
    • G02B17/08—Catadioptric systems
    • G02B17/0884—Catadioptric systems having a pupil corrector
    • G02B17/0888—Catadioptric systems having a pupil corrector the corrector having at least one aspheric surface, e.g. Schmidt plates
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B17/00—Systems with reflecting surfaces, with or without refracting elements
    • G02B17/08—Catadioptric systems

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
GB11001/46A 1941-07-25 1946-04-10 Improvements in photographic cameras and film projectors Expired GB642888A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL642888X 1941-07-25

Publications (1)

Publication Number Publication Date
GB642888A true GB642888A (en) 1950-09-13

Family

ID=19791823

Family Applications (1)

Application Number Title Priority Date Filing Date
GB11001/46A Expired GB642888A (en) 1941-07-25 1946-04-10 Improvements in photographic cameras and film projectors

Country Status (1)

Country Link
GB (1) GB642888A (en)

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