FR987673A - Magnifying glass - Google Patents

Magnifying glass

Info

Publication number
FR987673A
FR987673A FR987673DA FR987673A FR 987673 A FR987673 A FR 987673A FR 987673D A FR987673D A FR 987673DA FR 987673 A FR987673 A FR 987673A
Authority
FR
France
Prior art keywords
magnifying glass
magnifying
glass
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
Other languages
French (fr)
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.)
Imperial Chemical Industries Ltd
Original Assignee
Imperial Chemical Industries 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 Imperial Chemical Industries Ltd filed Critical Imperial Chemical Industries Ltd
Application granted granted Critical
Publication of FR987673A publication Critical patent/FR987673A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B3/00—Simple or compound lenses
    • G02B3/02—Simple or compound lenses with non-spherical faces
    • G02B3/04—Simple or compound lenses with non-spherical faces with continuous faces that are rotationally symmetrical but deviate from a true sphere, e.g. so called "aspheric" lenses
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B25/00—Eyepieces; Magnifying glasses
    • G02B25/002—Magnifying glasses

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Lenses (AREA)
FR987673D 1948-06-01 1949-05-31 Magnifying glass Expired FR987673A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1476548A GB643938A (en) 1948-06-01 1948-06-01 Lenses

Publications (1)

Publication Number Publication Date
FR987673A true FR987673A (en) 1951-08-17

Family

ID=10047096

Family Applications (1)

Application Number Title Priority Date Filing Date
FR987673D Expired FR987673A (en) 1948-06-01 1949-05-31 Magnifying glass

Country Status (3)

Country Link
DE (1) DE845414C (en)
FR (1) FR987673A (en)
GB (1) GB643938A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2133643C2 (en) * 1970-07-08 1982-04-22 Polaroid Corp., 02139 Cambridge, Mass. Photographic lens in the form of a triplet
US4249205A (en) * 1978-12-11 1981-02-03 Marvin P. Hodges Aspheric projection lens system utilizing concave image
DE102014017534A1 (en) * 2014-11-24 2016-05-25 Carl Zeiss Ag Display device which can be placed on the head of a user

Also Published As

Publication number Publication date
DE845414C (en) 1952-07-31
GB643938A (en) 1950-09-27

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