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GB1095767A - Wide angle lens - Google Patents

Wide angle lens

Info

Publication number
GB1095767A
GB1095767A GB1474565A GB1474565A GB1095767A GB 1095767 A GB1095767 A GB 1095767A GB 1474565 A GB1474565 A GB 1474565A GB 1474565 A GB1474565 A GB 1474565A GB 1095767 A GB1095767 A GB 1095767A
Authority
GB
United Kingdom
Prior art keywords
negative
cemented
diaphragm
wide angle
angle lens
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
GB1474565A
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.)
LUDWIG JAKOB BERTELE
Leica Geosystems AG
Original Assignee
LUDWIG JAKOB BERTELE
Wild Heerbrugg AG
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 LUDWIG JAKOB BERTELE, Wild Heerbrugg AG filed Critical LUDWIG JAKOB BERTELE
Priority to GB1474565A priority Critical patent/GB1095767A/en
Publication of GB1095767A publication Critical patent/GB1095767A/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

Landscapes

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

Abstract

1,095,767. Optical objectives. WILD HEERBRUGG A. G. and L. J. BERTELE. April 7, 1965, No. 14745/65. Heading G2J. A wide angle lens has a negative front member A, two positive middle members B, C separated by a diaphragm B1 and a negative rear member D, each member B, C having a positive element L2, L5, of greater refractive index cemented by a convex surface r 4 , r 7 to a concave surface of a negative element L 3 , L 4 of lesser refractive index adjacent the diaphragm, one of the members, as shown, member B consisting solely of such cemented doublet and the other member having an additional negative element L 6 which is a meniscus concave towards the diaphragm and is located at a distance from the positive element L 5 which is between 0 and 0À12 times the focal length of the objective. The negative meniscus element may be located in member B, Fig. 2 (not shown), or cemented to make member C into a cemented triplet, Figs. 3 and 4 (not shown), the rear member D in Fig. 4 having two negative elements. Optical data are given for the four examples.
GB1474565A 1965-04-07 1965-04-07 Wide angle lens Expired GB1095767A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1474565A GB1095767A (en) 1965-04-07 1965-04-07 Wide angle lens

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1474565A GB1095767A (en) 1965-04-07 1965-04-07 Wide angle lens

Publications (1)

Publication Number Publication Date
GB1095767A true GB1095767A (en) 1967-12-20

Family

ID=10046741

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1474565A Expired GB1095767A (en) 1965-04-07 1965-04-07 Wide angle lens

Country Status (1)

Country Link
GB (1) GB1095767A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3833290A (en) * 1971-11-25 1974-09-03 Zeiss Stiftung High power wide-angle lens
JPS5096221A (en) * 1973-12-24 1975-07-31
US4176915A (en) * 1976-11-02 1979-12-04 Nippon Kogaku K.K. Wide angle lens

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3833290A (en) * 1971-11-25 1974-09-03 Zeiss Stiftung High power wide-angle lens
JPS5096221A (en) * 1973-12-24 1975-07-31
US4176915A (en) * 1976-11-02 1979-12-04 Nippon Kogaku K.K. Wide angle lens

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