GB848928A - Improvements relating to optical systems with alternative magnifications - Google Patents

Improvements relating to optical systems with alternative magnifications

Info

Publication number
GB848928A
GB848928A GB15199/58A GB1519958A GB848928A GB 848928 A GB848928 A GB 848928A GB 15199/58 A GB15199/58 A GB 15199/58A GB 1519958 A GB1519958 A GB 1519958A GB 848928 A GB848928 A GB 848928A
Authority
GB
United Kingdom
Prior art keywords
optical systems
improvements relating
magnifications
alternative
positions
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
GB15199/58A
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.)
Optische Industrie de Oude Delft NV
Original Assignee
Optische Industrie de Oude Delft 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 Optische Industrie de Oude Delft NV filed Critical Optische Industrie de Oude Delft NV
Publication of GB848928A publication Critical patent/GB848928A/en
Expired 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
    • G02B15/142—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 having two groups only
    • G02B15/1421—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 having two groups only the first group being positive

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Lenses (AREA)
GB15199/58A 1957-05-13 1958-05-12 Improvements relating to optical systems with alternative magnifications Expired GB848928A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL848928X 1957-05-13

Publications (1)

Publication Number Publication Date
GB848928A true GB848928A (en) 1960-09-21

Family

ID=19845281

Family Applications (1)

Application Number Title Priority Date Filing Date
GB15199/58A Expired GB848928A (en) 1957-05-13 1958-05-12 Improvements relating to optical systems with alternative magnifications

Country Status (2)

Country Link
GB (1) GB848928A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
NL (2) NL108245C (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Also Published As

Publication number Publication date
NL217246A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
NL108245C (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

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