GB194608A - Improvements in photographic objectives - Google Patents

Improvements in photographic objectives

Info

Publication number
GB194608A
GB194608A GB1690322A GB1690322A GB194608A GB 194608 A GB194608 A GB 194608A GB 1690322 A GB1690322 A GB 1690322A GB 1690322 A GB1690322 A GB 1690322A GB 194608 A GB194608 A GB 194608A
Authority
GB
United Kingdom
Prior art keywords
lenses
refractive index
negative
positive
photographic 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
GB1690322A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB1690322A priority Critical patent/GB194608A/en
Publication of GB194608A publication Critical patent/GB194608A/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

Landscapes

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

Abstract

194,608. Graf, C. June 19, 1922. Lenses.-A soft focus photographic objective is similar in form to the lens described in Specification 22400/10, but differs from it in the thickness of the lenses, the radii of curvature and the separations of the lenses, so that a certain amount of spherical aberration remains uncorrected. The negative lenses arranged between the positive lenses are symmetrical with regard to curvatures and refractive index, and the positive lenses are unsymmetrical, and have a refractive index greater than that of the negative lenses. In the example given by numerical data, the index of refraction for the G-line of all the lenses is the same.
GB1690322A 1922-06-19 1922-06-19 Improvements in photographic objectives Expired GB194608A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1690322A GB194608A (en) 1922-06-19 1922-06-19 Improvements in photographic objectives

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1690322A GB194608A (en) 1922-06-19 1922-06-19 Improvements in photographic objectives

Publications (1)

Publication Number Publication Date
GB194608A true GB194608A (en) 1923-03-15

Family

ID=10085747

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1690322A Expired GB194608A (en) 1922-06-19 1922-06-19 Improvements in photographic objectives

Country Status (1)

Country Link
GB (1) GB194608A (en)

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