GB608661A - Improvements in or relating to optical objectives - Google Patents

Improvements in or relating to optical objectives

Info

Publication number
GB608661A
GB608661A GB18073/47A GB1807347A GB608661A GB 608661 A GB608661 A GB 608661A GB 18073/47 A GB18073/47 A GB 18073/47A GB 1807347 A GB1807347 A GB 1807347A GB 608661 A GB608661 A GB 608661A
Authority
GB
United Kingdom
Prior art keywords
airspace
objective
central
meniscus
optical objectives
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
GB18073/47A
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.)
Kodak Ltd
Original Assignee
Kodak 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 Kodak Ltd filed Critical Kodak Ltd
Publication of GB608661A publication Critical patent/GB608661A/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

608,661. Optical objectives. KODAK, Ltd. Jan. 29, 1945, No. 18073/47. Convention date, Nov. 20, 1943. Divided out of 608,583. Drawings to Specification. [Class 97 (i)] In an objective consisting of two collective members separated by a central airspace, each member comprising a thick meniscus compound component strongly concave towards the central airspace and at least one positive component on the convex side of each meniscus, the average value of the ratio R/(Nl - 1) for the two surfaces bounding the central airspace exceeds the axial length of such airspace by less than F/6, where R is the radius of curvature and N<1> the refractive index of the glass at the surface and F is the focal length of the objective. Data for four examples are given including one in which negative lenses are placed before and behind the objective to change the stop position. Specifications 608,583 and 608,586 are referred to.
GB18073/47A 1943-11-20 1945-01-29 Improvements in or relating to optical objectives Expired GB608661A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US608661XA 1943-11-20 1943-11-20

Publications (1)

Publication Number Publication Date
GB608661A true GB608661A (en) 1948-09-17

Family

ID=22032225

Family Applications (1)

Application Number Title Priority Date Filing Date
GB18073/47A Expired GB608661A (en) 1943-11-20 1945-01-29 Improvements in or relating to optical objectives

Country Status (1)

Country Link
GB (1) GB608661A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2701982A (en) * 1953-03-26 1955-02-15 Angenieux
DE964726C (en) * 1950-09-14 1957-07-11 Voigtlaender A G Four-unit Gauss lens

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE964726C (en) * 1950-09-14 1957-07-11 Voigtlaender A G Four-unit Gauss lens
US2701982A (en) * 1953-03-26 1955-02-15 Angenieux

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