GB978797A - Improvements in or relating to wide-angle lenses - Google Patents

Improvements in or relating to wide-angle lenses

Info

Publication number
GB978797A
GB978797A GB2322963A GB2322963A GB978797A GB 978797 A GB978797 A GB 978797A GB 2322963 A GB2322963 A GB 2322963A GB 2322963 A GB2322963 A GB 2322963A GB 978797 A GB978797 A GB 978797A
Authority
GB
United Kingdom
Prior art keywords
convergent
divergent
elements
numerically
image
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
GB2322963A
Inventor
Wolf Dannberg
Eberhard Dietzsch
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.)
Jenoptik AG
Original Assignee
Carl Zeiss Jena GmbH
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 Carl Zeiss Jena GmbH filed Critical Carl Zeiss Jena GmbH
Priority to GB2322963A priority Critical patent/GB978797A/en
Publication of GB978797A publication Critical patent/GB978797A/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

Abstract

978, 797. Optical objectives; CARL ZEISS JENA VEB. June 11, 1963, No. 23229/63. Heading G2J. The six component objective has an angular field of more than 90 degrees and, f being the focal length of the objective, (a) a distance between back element and image at least 1. 8 f and a constructional length at most 2. 8 f, (b) elements 1, 2, 3 form a divergent group, each is a meniscus convex to the object, 1 is convergent and both 2 and 3 are divergent, (c) elements 4-10 form a convergent group the elements 4, 5 and 6, 7 respectively being of opposite refractive power and cemented together, 6, 7, is biconvex and convergent, 8, 9, 10, are cemented together and form a meniscus convex towards the image, 8 being divergent and 9 and 10 convergent, (d) 6, 7, has a focal length numerically smaller than f and the focal lengths of each of 4, 5 and 8-10 respectively are numerically at least 10 f. (e) the thickness d4 + d5 is at least equal to 0. 6 f and both r7 and r9 are numerically at least equal to 5 f. As shown r8, r11 and r14 are dispersive cemented surfaces convex towards the object wherein f > r8 > r11 > r14 > 0. 4 f and where n is the refractive index for the helium line d. Optical data are given for two examples.
GB2322963A 1963-06-11 1963-06-11 Improvements in or relating to wide-angle lenses Expired GB978797A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2322963A GB978797A (en) 1963-06-11 1963-06-11 Improvements in or relating to wide-angle lenses

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2322963A GB978797A (en) 1963-06-11 1963-06-11 Improvements in or relating to wide-angle lenses

Publications (1)

Publication Number Publication Date
GB978797A true GB978797A (en) 1964-12-23

Family

ID=10192262

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2322963A Expired GB978797A (en) 1963-06-11 1963-06-11 Improvements in or relating to wide-angle lenses

Country Status (1)

Country Link
GB (1) GB978797A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1294060B (en) * 1966-06-30 1969-04-30 Asahi Optical Co Ltd Wide angle lens
US3549241A (en) * 1967-10-24 1970-12-22 Nippon Kogaku Kk Extremely wide-angle object lens

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1294060B (en) * 1966-06-30 1969-04-30 Asahi Optical Co Ltd Wide angle lens
US3549241A (en) * 1967-10-24 1970-12-22 Nippon Kogaku Kk Extremely wide-angle object lens

Similar Documents

Publication Publication Date Title
GB1378005A (en) Zoom lens
GB1184249A (en) Improvements relating to Wide Angle Lenses
GB978797A (en) Improvements in or relating to wide-angle lenses
GB1067428A (en) Improvements in or relating to objectives with variable focal lengths
GB779614A (en) Photographic objective
US3549242A (en) Zooming lens of extremely high zooming ratio
GB1019313A (en) Wide-angle eye-piece
GB1258189A (en)
ES391707A1 (en) Continuously-variable-magnification afocal lens system
GB965015A (en) Photographic objectives
US3393958A (en) Compact zoom lens corrected over a large range of magnification
GB1186302A (en) Anamorphic Supplementary Lens System.
GB1222002A (en) A wide angle zoom lens
GB937333A (en) Afocal wide-angle supplementary objective
GB1076789A (en) Photographic objective of continuously variable focal length
GB1205841A (en) Lens with variable focal length
GB1259086A (en)
GB977745A (en) Afocal wide-angle supplementary objective
GB1020462A (en)
GB1215842A (en) Reproduction objective
GB967977A (en) A zoom lens, more particularly for miniature still cameras
GB1075147A (en) Photographic objective
GB1285303A (en) Image focusing lens system for copying machines
GB747228A (en) Improvements in or relating to anamorphotic optical systems
GB1287019A (en) Reproduction lens of high image-resolving power with an image-side numerical aperture of 0.5