GB258092A - Improvements in lens systems - Google Patents

Improvements in lens systems

Info

Publication number
GB258092A
GB258092A GB2400325A GB2400325A GB258092A GB 258092 A GB258092 A GB 258092A GB 2400325 A GB2400325 A GB 2400325A GB 2400325 A GB2400325 A GB 2400325A GB 258092 A GB258092 A GB 258092A
Authority
GB
United Kingdom
Prior art keywords
convergent
members
lens
lenses
aperture
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
GB2400325A
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 GB2400325A priority Critical patent/GB258092A/en
Publication of GB258092A publication Critical patent/GB258092A/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

Abstract

258,092. Warmisham, A., and Kapella, Ltd. Sept. 26, 1925. Lenses.-In photographic objectives of the Petzval type the zonal spherical aberration is. reduced, permitting a corresponding increase in working aperture, by dividing the front convergent member into two convergent members, Fig. 3. Alternatively, the convergent component of the back member of the lens may be two convergent members, or both front and back members may be thus constructed, Fig. 6. The two front convergent members are meniscusshaped and present their concave surfaces toward the back of the lens. Numerical data for examples of lenses having an aperture of F/1.5 are given in the Specification.
GB2400325A 1925-09-26 1925-09-26 Improvements in lens systems Expired GB258092A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2400325A GB258092A (en) 1925-09-26 1925-09-26 Improvements in lens systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2400325A GB258092A (en) 1925-09-26 1925-09-26 Improvements in lens systems

Publications (1)

Publication Number Publication Date
GB258092A true GB258092A (en) 1926-09-16

Family

ID=10204830

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2400325A Expired GB258092A (en) 1925-09-26 1925-09-26 Improvements in lens systems

Country Status (1)

Country Link
GB (1) GB258092A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE965362C (en) * 1949-12-07 1957-06-06 Pierre Angenieux Lens with a large relative aperture

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE965362C (en) * 1949-12-07 1957-06-06 Pierre Angenieux Lens with a large relative aperture

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