GB477448A - Improvements in and relating to objectives - Google Patents

Improvements in and relating to objectives

Info

Publication number
GB477448A
GB477448A GB1807336A GB1807336A GB477448A GB 477448 A GB477448 A GB 477448A GB 1807336 A GB1807336 A GB 1807336A GB 1807336 A GB1807336 A GB 1807336A GB 477448 A GB477448 A GB 477448A
Authority
GB
United Kingdom
Prior art keywords
dispersive
refractive index
collective
component
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
GB1807336A
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.)
HORACE WILLIAM LEE
Kapella Ltd
Original Assignee
HORACE WILLIAM LEE
Kapella 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 HORACE WILLIAM LEE, Kapella Ltd filed Critical HORACE WILLIAM LEE
Priority to GB1807336A priority Critical patent/GB477448A/en
Publication of GB477448A publication Critical patent/GB477448A/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

477,448. Lenses. LEE, H. W., and KAPELLA, Ltd. June 30, 1936, No. 18073. [Class 97 (i)] A photographic objective corrected for spherical and chromatic aberrations, coma, astigmatism, field curvature, and distortion, comprises two collective components each consisting of a double convex element of high refractive index cemented to a dispersive element of lower refractive index, and a dispersive component located' between and separated by air spaces from the collective components and consisting of a double convex element of high refractive index cemented between two double concave elements of lower refractive index. Preferably, the refractive index of each collective element exceeds by at least 0À05 that of the dispersive element, or of each dispersive element, associated with it, and the AbbÚ numbers of the collective elements are higher than those of the associated dispersive elements. The power of each component is not greater numerically than 2À25 times the power of the system and the power of each cemented surface exceeds one-tenth that of the system. The dispersive element of each collective component is preferably on the side towards the dispersive component. Data are given for the example shown having an aperture f /2.
GB1807336A 1936-06-30 1936-06-30 Improvements in and relating to objectives Expired GB477448A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1807336A GB477448A (en) 1936-06-30 1936-06-30 Improvements in and relating to objectives

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1807336A GB477448A (en) 1936-06-30 1936-06-30 Improvements in and relating to objectives

Publications (1)

Publication Number Publication Date
GB477448A true GB477448A (en) 1937-12-30

Family

ID=10106191

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1807336A Expired GB477448A (en) 1936-06-30 1936-06-30 Improvements in and relating to objectives

Country Status (1)

Country Link
GB (1) GB477448A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5557547A (en) * 1992-10-22 1996-09-17 Hewlett-Packard Company Monitoring system status
US6473400B1 (en) * 1998-05-15 2002-10-29 3Com Technologies Computation of traffic flow by scaling sample packet data

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5557547A (en) * 1992-10-22 1996-09-17 Hewlett-Packard Company Monitoring system status
US6473400B1 (en) * 1998-05-15 2002-10-29 3Com Technologies Computation of traffic flow by scaling sample packet data

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