GB768193A - Prism field glass - Google Patents

Prism field glass

Info

Publication number
GB768193A
GB768193A GB705755A GB705755A GB768193A GB 768193 A GB768193 A GB 768193A GB 705755 A GB705755 A GB 705755A GB 705755 A GB705755 A GB 705755A GB 768193 A GB768193 A GB 768193A
Authority
GB
United Kingdom
Prior art keywords
prism
field glass
zeiss
ocular
glass system
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
GB705755A
Inventor
Horst Koehler
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.)
Carl Zeiss AG
Original Assignee
Carl Zeiss AG
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 Carl Zeiss AG filed Critical Carl Zeiss AG
Priority to GB705755A priority Critical patent/GB768193A/en
Publication of GB768193A publication Critical patent/GB768193A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B23/00—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices

Landscapes

  • Physics & Mathematics (AREA)
  • Astronomy & Astrophysics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Surface Treatment Of Optical Elements (AREA)

Abstract

768,193. Optical systems. ZEISS-STIFTUNG, C., [trading as ZEISS, C., [Firm of]]. March 10, 1955, No. 7057/55. Addition to 734,248. Class 97(1) In a prism field glass system according to the parent Specification chromatic magnification difference due to the objective is reduced by forming the prism of glass in which the quotient nF - nC/nD<SP>2</SP> is: greater than 0.0055 where nF, nC and nD indicate the refractive indices for the Fraunhofer lines F, C and D. The ocular may include outer cemented menicus components, concave outwards, that facing the eye being a doublet with the reciprocal of the radius of curvature of its cemented surface between -1/15 and +¢ of the ocular focal length. Numerical data are given for one example of the field glass system' shown.
GB705755A 1955-03-10 1955-03-10 Prism field glass Expired GB768193A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB705755A GB768193A (en) 1955-03-10 1955-03-10 Prism field glass

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB705755A GB768193A (en) 1955-03-10 1955-03-10 Prism field glass

Publications (1)

Publication Number Publication Date
GB768193A true GB768193A (en) 1957-02-13

Family

ID=9825801

Family Applications (1)

Application Number Title Priority Date Filing Date
GB705755A Expired GB768193A (en) 1955-03-10 1955-03-10 Prism field glass

Country Status (1)

Country Link
GB (1) GB768193A (en)

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