GB231028A - An improved diffusing device for lenses - Google Patents

An improved diffusing device for lenses

Info

Publication number
GB231028A
GB231028A GB1114124A GB1114124A GB231028A GB 231028 A GB231028 A GB 231028A GB 1114124 A GB1114124 A GB 1114124A GB 1114124 A GB1114124 A GB 1114124A GB 231028 A GB231028 A GB 231028A
Authority
GB
United Kingdom
Prior art keywords
lenses
diffusing device
improved diffusing
conical
improved
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
GB1114124A
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.)
Kapella Ltd
Original Assignee
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 Kapella Ltd filed Critical Kapella Ltd
Priority to GB1114124A priority Critical patent/GB231028A/en
Publication of GB231028A publication Critical patent/GB231028A/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
    • G02B13/20—Soft-focus objectives

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Overhead Projectors And Projection Screens (AREA)

Abstract

231,028. Warmisham, A., and Kapella, Ltd. May 6, 1924. Drawings to Specification. Lenses.-Photographic objectives have, one of the surfaces formed as a conical refracting surface for the purpose of introducing a definite amount of spherical aberration and in such a manner that the circles of confusion are without a relatively bright nucleus. Such conical surface may be part of a detachable element or in corporated with a spherical surface as an integral part of an objective.
GB1114124A 1924-05-06 1924-05-06 An improved diffusing device for lenses Expired GB231028A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1114124A GB231028A (en) 1924-05-06 1924-05-06 An improved diffusing device for lenses

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1114124A GB231028A (en) 1924-05-06 1924-05-06 An improved diffusing device for lenses

Publications (1)

Publication Number Publication Date
GB231028A true GB231028A (en) 1925-03-26

Family

ID=9980780

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1114124A Expired GB231028A (en) 1924-05-06 1924-05-06 An improved diffusing device for lenses

Country Status (1)

Country Link
GB (1) GB231028A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4191462A (en) * 1978-04-24 1980-03-04 Polaroid Corporation Fixed focus exposure control apparatus with reverse spherical aberration corrective characteristic

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4191462A (en) * 1978-04-24 1980-03-04 Polaroid Corporation Fixed focus exposure control apparatus with reverse spherical aberration corrective characteristic

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