GB889281A - Improvements in and relating to objectives - Google Patents

Improvements in and relating to objectives

Info

Publication number
GB889281A
GB889281A GB6073/58A GB607358A GB889281A GB 889281 A GB889281 A GB 889281A GB 6073/58 A GB6073/58 A GB 6073/58A GB 607358 A GB607358 A GB 607358A GB 889281 A GB889281 A GB 889281A
Authority
GB
United Kingdom
Prior art keywords
component
objective
stop
negative
power
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
GB6073/58A
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.)
Farrand Optical Co Inc
Original Assignee
Farrand Optical Co Inc
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 Farrand Optical Co Inc filed Critical Farrand Optical Co Inc
Publication of GB889281A publication Critical patent/GB889281A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/16—Optical objectives specially designed for the purposes specified below for use in conjunction with image converters or intensifiers, or for use with projectors, e.g. objectives for projection TV
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below

Landscapes

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

Abstract

889,281. Optical objectives. FARRAND OPTICAL CO. Inc. Feb. 25, 1958 [Feb. 25, 1957], No. 6073/58. Class 97(1). A wide aperture objective comprises, in front of the stop, a compound collecting member M 1 made up of two simple meniscus lenses, and a negative meniscus component C, and, behind the stop, a second negative meniscus component C 2 which like the first negative meniscus component is concave to the stop, a negative component C 3 of unequal surface curvatures and a second compound collecting member M 2 . In this objective the sums of the surface refractive powers of the members and the components are related to the power of the objective as follows:- while the sum # (C 1 , C 2 ) of the powers of the surfaces bounding the stop are related to the objective power by the relation 2.5# < -# (C 1 , C 2 ) < 4.5#. The component C 1 is made up of two elements of opposite power which may be cemented together or, as shown, slightly spaced apart. The front elements of member M 2 may be spaced from the negative component C 3 or cemented thereto. Preferably a field flattening lens L F is added to the objective. Optical data are given in the Specification for two examples. Specification 439,142 is referred to.
GB6073/58A 1957-02-25 1958-02-25 Improvements in and relating to objectives Expired GB889281A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US1201503XA 1957-02-25 1957-02-25

Publications (1)

Publication Number Publication Date
GB889281A true GB889281A (en) 1962-02-14

Family

ID=22388545

Family Applications (1)

Application Number Title Priority Date Filing Date
GB6073/58A Expired GB889281A (en) 1957-02-25 1958-02-25 Improvements in and relating to objectives

Country Status (2)

Country Link
FR (1) FR1201503A (en)
GB (1) GB889281A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3516734A (en) * 1965-05-08 1970-06-23 Leitz Ernst Gmbh Lens system for positioning an image recorder remotely from an aperture

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3516734A (en) * 1965-05-08 1970-06-23 Leitz Ernst Gmbh Lens system for positioning an image recorder remotely from an aperture

Also Published As

Publication number Publication date
FR1201503A (en) 1959-12-30

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