GB836087A - Photographic objective - Google Patents

Photographic objective

Info

Publication number
GB836087A
GB836087A GB8602/58A GB860258A GB836087A GB 836087 A GB836087 A GB 836087A GB 8602/58 A GB8602/58 A GB 8602/58A GB 860258 A GB860258 A GB 860258A GB 836087 A GB836087 A GB 836087A
Authority
GB
United Kingdom
Prior art keywords
component
convex towards
optical
front component
spaced
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
GB8602/58A
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.)
LUDWIG FAKOB BERTELE
Original Assignee
LUDWIG FAKOB BERTELE
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 LUDWIG FAKOB BERTELE filed Critical LUDWIG FAKOB BERTELE
Publication of GB836087A publication Critical patent/GB836087A/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 -
    • G02B9/12—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or - having three components only

Landscapes

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

Abstract

836,087. Optical objectives. BERTELE, L. F. March 18, 1958 [April 4, 1957], No. 8602/58. Class 97(1) In an optical objective consisting of three lens components, of which the front component is a positive meniscus doublet convex towards the object, the second component is convergent and spaced from the front component by at least 0.18.F, and the third component is divergent is spaced from the second component by at least 0.15.F and is a meniscus convex towards the rear, the contact surface of the front component is convex towards the rear, the refractive index n 2 of the element on the image side thereof is at least 0.16 more than that n 1 of the element on the object side thereof, and the radius curvature of this surface is between 0.90.F #n 2 -n 1 and 1.40.F #n 2 -n 1 , where F is the focal length of the objective. Preferably, the focal length of the rear component is less than -0.42.F. Optical data are given in the Specification for three examples of the embodiment shown. U.S.A. Specification 2,762,262 is referred to.
GB8602/58A 1957-04-04 1958-03-18 Photographic objective Expired GB836087A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE836087X 1957-04-04

Publications (1)

Publication Number Publication Date
GB836087A true GB836087A (en) 1960-06-01

Family

ID=6761081

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8602/58A Expired GB836087A (en) 1957-04-04 1958-03-18 Photographic objective

Country Status (1)

Country Link
GB (1) GB836087A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1282312B (en) * 1962-12-06 1968-11-07 Zeiss Carl Fa Photographic telephoto lens
EP0595533A1 (en) * 1992-10-30 1994-05-04 AT&T Corp. Objective lens for a free-space photonic switching system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1282312B (en) * 1962-12-06 1968-11-07 Zeiss Carl Fa Photographic telephoto lens
EP0595533A1 (en) * 1992-10-30 1994-05-04 AT&T Corp. Objective lens for a free-space photonic switching system

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