GB544658A - Improvements in or relating to optical objectives - Google Patents

Improvements in or relating to optical objectives

Info

Publication number
GB544658A
GB544658A GB1552240A GB1552240A GB544658A GB 544658 A GB544658 A GB 544658A GB 1552240 A GB1552240 A GB 1552240A GB 1552240 A GB1552240 A GB 1552240A GB 544658 A GB544658 A GB 544658A
Authority
GB
United Kingdom
Prior art keywords
component
components
taylor
objective
glass
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
GB1552240A
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.)
Taylor Taylor and Hobson Ltd
Original Assignee
Taylor Taylor and Hobson 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 Taylor Taylor and Hobson Ltd filed Critical Taylor Taylor and Hobson Ltd
Priority to GB1552240A priority Critical patent/GB544658A/en
Publication of GB544658A publication Critical patent/GB544658A/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
    • G02B13/04—Reversed telephoto objectives
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below

Abstract

544,658. Lenses. TAYLOR, TAYLOR & HOBSON, Ltd., and WARMISHAM, A. Oct. 21, 1940, No. 15522. [Class 97 (i)] In a photographic &c. objective comprising two compound meniscus divergent components behind two simple convergent components and in front of another simple convergent component, the radius of the front surface R<SP>11</SP> of the rear component is greater than that of its rear surface R<SP>12</SP>, and the cemented surface R<SP>6</SP> of the third component is slightly collective. The glass in front of the surface R<SP>6</SP> may have a mean refractive index greater than .015 and less than .035 in excess of that of the glass behind it. The surfaces R<SP>1</SP>, R<SP>2</SP> of the front component may be, respectively, more strongly curved than the surfaces R<SP>3</SP>, R<SP>4</SP> of the second component, and the numerical sum of the radii of the concave air-exposed surfaces R<SP>7</SP>, R<SP>8</SP> of the third and fourth components may lie between 0.5 and 0.65 times the equivalent focal length of the objective. Complete data are set out for a lens corrected for spherical aberration, coma, astigmatism, field curvature, and distortion, over a semi-angular field of 24 degrees, and having a relative aperture of F/ 1.4.
GB1552240A 1940-10-21 1940-10-21 Improvements in or relating to optical objectives Expired GB544658A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1552240A GB544658A (en) 1940-10-21 1940-10-21 Improvements in or relating to optical objectives

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1552240A GB544658A (en) 1940-10-21 1940-10-21 Improvements in or relating to optical objectives

Publications (1)

Publication Number Publication Date
GB544658A true GB544658A (en) 1942-04-22

Family

ID=10060609

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1552240A Expired GB544658A (en) 1940-10-21 1940-10-21 Improvements in or relating to optical objectives

Country Status (1)

Country Link
GB (1) GB544658A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2487749A (en) * 1944-02-25 1949-11-08 Wray Optical Works Ltd Four component optical objective
US2811082A (en) * 1955-12-24 1957-10-29 Paillard Sa Photographic objectives comprising five components axially aligned and air separated
US2836102A (en) * 1955-08-16 1958-05-27 Canon Camera Co High aperture photographic lens
DE1073765B (en) * 1960-01-21 Paillard S.A., Sainte - Croix (Schweiz) Photographic lens
DE1103616B (en) * 1957-02-25 1961-03-30 Farrand Optical Co Inc lens
DE1248323B (en) * 1958-04-17 1967-08-24 Farrand Optical Co Inc Fast photographic lens with a large field of view

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1073765B (en) * 1960-01-21 Paillard S.A., Sainte - Croix (Schweiz) Photographic lens
US2487749A (en) * 1944-02-25 1949-11-08 Wray Optical Works Ltd Four component optical objective
US2836102A (en) * 1955-08-16 1958-05-27 Canon Camera Co High aperture photographic lens
US2811082A (en) * 1955-12-24 1957-10-29 Paillard Sa Photographic objectives comprising five components axially aligned and air separated
DE1103616B (en) * 1957-02-25 1961-03-30 Farrand Optical Co Inc lens
DE1248323B (en) * 1958-04-17 1967-08-24 Farrand Optical Co Inc Fast photographic lens with a large field of view

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