GB791312A - Photographic objectives - Google Patents

Photographic objectives

Info

Publication number
GB791312A
GB791312A GB30848/56A GB3084856A GB791312A GB 791312 A GB791312 A GB 791312A GB 30848/56 A GB30848/56 A GB 30848/56A GB 3084856 A GB3084856 A GB 3084856A GB 791312 A GB791312 A GB 791312A
Authority
GB
United Kingdom
Prior art keywords
wedge
blank
lens
sectors
march
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
GB30848/56A
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.)
THEODORE HENDRIK NAKKEN
Original Assignee
THEODORE HENDRIK NAKKEN
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 THEODORE HENDRIK NAKKEN filed Critical THEODORE HENDRIK NAKKEN
Publication of GB791312A publication Critical patent/GB791312A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/04—Prisms
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/18—Optical objectives specially designed for the purposes specified below with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B3/00—Simple or compound lenses

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Lens Barrels (AREA)

Abstract

791,312. Optical objectives. NAKKEN, T. H. March 19, 1954 [March 26, 1953], No. 30848/56. Divided out of 791,311. Class 97(1) A universal focus lens for use in a photographic objective is formed from a lens blank composed of a series of wedge shaped sectors, Fig. 1, placed with their apices adjacent and welded together at the contacting sides, adjacent sectors having different refractive indices and the surfaces of the blank being ground according to the optical Specifications of the lens. The wedge-shaped sectors may be in the form of wedge-shaped rods welded together the blank being cut from the rod. As shown three different glasses I, II and III are used. Specification 608,892 is referred to.
GB30848/56A 1953-03-26 1954-03-19 Photographic objectives Expired GB791312A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US791312XA 1953-03-26 1953-03-26

Publications (1)

Publication Number Publication Date
GB791312A true GB791312A (en) 1958-02-26

Family

ID=22148630

Family Applications (1)

Application Number Title Priority Date Filing Date
GB30848/56A Expired GB791312A (en) 1953-03-26 1954-03-19 Photographic objectives

Country Status (1)

Country Link
GB (1) GB791312A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3594075A (en) * 1968-10-14 1971-07-20 David Jean Smith Bifocal ophthalmic lens
US3811754A (en) * 1972-10-18 1974-05-21 Rca Corp Correcting lens
GB2153552A (en) * 1984-01-26 1985-08-21 Hajime Industries Object inspection apparatus
DE102016125377A1 (en) * 2016-12-22 2018-06-28 Deutsche Telekom Ag Refractive lens, lens and digital camera system

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3594075A (en) * 1968-10-14 1971-07-20 David Jean Smith Bifocal ophthalmic lens
US3811754A (en) * 1972-10-18 1974-05-21 Rca Corp Correcting lens
GB2153552A (en) * 1984-01-26 1985-08-21 Hajime Industries Object inspection apparatus
DE102016125377A1 (en) * 2016-12-22 2018-06-28 Deutsche Telekom Ag Refractive lens, lens and digital camera system
DE102016125377B4 (en) 2016-12-22 2019-01-03 Deutsche Telekom Ag Refractive lens, lens and digital camera system

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