[go: up one dir, main page]

GB572086A - Improvements in lenses - Google Patents

Improvements in lenses

Info

Publication number
GB572086A
GB572086A GB444044A GB444044A GB572086A GB 572086 A GB572086 A GB 572086A GB 444044 A GB444044 A GB 444044A GB 444044 A GB444044 A GB 444044A GB 572086 A GB572086 A GB 572086A
Authority
GB
United Kingdom
Prior art keywords
positive
inches
negative
focal length
component
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
GB444044A
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.)
BERTRAM LANGTON
J H DALLMEYER Ltd
Original Assignee
BERTRAM LANGTON
J H DALLMEYER Ltd
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 BERTRAM LANGTON, J H DALLMEYER Ltd filed Critical BERTRAM LANGTON
Priority to GB444044A priority Critical patent/GB572086A/en
Publication of GB572086A publication Critical patent/GB572086A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B9/00—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or -
    • G02B9/34—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or - having four components only

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Lenses (AREA)

Abstract

572,086. Lenses. DALLMEYER, Ltd., J. H., and LANGTON, B. March 9, 1944, No. 4440. [Class 97 (i)] An objective of the Brucke type (in which the back focus is greater than the focal length) comprises a front negative component consisting of a single positive element followed by a single negative element with an intervening air space having the form of a dispersive lens, and a rear positive component consisting of two members only and formed by a positive doublet element followed by a positive single or doublet element. The contact surface (or surfaces) of the positive component is, or are, preferably convex towards the negative component. Data are given for a lens having an equivalent focal length of 0.52 inches, a back focus of 1.1 inches, and an aperture of F/2.8.
GB444044A 1944-03-09 1944-03-09 Improvements in lenses Expired GB572086A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB444044A GB572086A (en) 1944-03-09 1944-03-09 Improvements in lenses

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB444044A GB572086A (en) 1944-03-09 1944-03-09 Improvements in lenses

Publications (1)

Publication Number Publication Date
GB572086A true GB572086A (en) 1945-09-21

Family

ID=9777218

Family Applications (1)

Application Number Title Priority Date Filing Date
GB444044A Expired GB572086A (en) 1944-03-09 1944-03-09 Improvements in lenses

Country Status (1)

Country Link
GB (1) GB572086A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2785603A (en) * 1953-08-04 1957-03-19 Taylor Taylor & Hobson Ltd Inverted telephoto optical objectives having a divergent front member widely separated from a convergent rear member
DE1282313B (en) * 1966-02-02 1968-11-07 Rodenstock Optik G Lens for color photography
US4206977A (en) * 1977-09-13 1980-06-10 Olympus Optical Co., Ltd. Reproducing objective for video disks

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2785603A (en) * 1953-08-04 1957-03-19 Taylor Taylor & Hobson Ltd Inverted telephoto optical objectives having a divergent front member widely separated from a convergent rear member
DE1282313B (en) * 1966-02-02 1968-11-07 Rodenstock Optik G Lens for color photography
US4206977A (en) * 1977-09-13 1980-06-10 Olympus Optical Co., Ltd. Reproducing objective for video disks

Similar Documents

Publication Publication Date Title
GB572086A (en) Improvements in lenses
GB824867A (en) Wide angle objective
GB609669A (en) Improvements in or relating to optical objectives
GB749493A (en) Photographic objective
GB873703A (en) Improvements in or relating to optical objectives
GB883988A (en) Improvements in objective lenses
GB522651A (en) Improvements in or relating to optical objectives
GB609408A (en) Improvements in or relating to optical objectives
GB583297A (en) Improvements in or relating to optical objectives
GB818807A (en) A wide aperture tele-photo-lens
GB555464A (en) Improvements in or relating to photographic objectives
GB561156A (en) Improvements in or relating to optical objectives
GB619818A (en) Improvements in or relating to optical objectives
GB595961A (en) Improved high aperture photographic objective
GB692013A (en) Improvements in optical objectives
GB620635A (en) Improvements in or relating to photographic objectives
GB609407A (en) Improvements in or relating to optical objectives
GB684210A (en) Photographic objective lenses
GB720724A (en) Improvements in or relating to photographic objectives
GB563359A (en) Improvements in or relating to telephoto lenses
GB838967A (en) Lens system for a photographic objective
GB477424A (en) Improvements in objectives
GB620634A (en) Improvements in or relating to high aperture objectives
GB723367A (en) Photographic objective
GB604883A (en) Improvements relating to optical lenses