FR1180268A - Multi-focal lens - Google Patents

Multi-focal lens

Info

Publication number
FR1180268A
FR1180268A FR1180268DA FR1180268A FR 1180268 A FR1180268 A FR 1180268A FR 1180268D A FR1180268D A FR 1180268DA FR 1180268 A FR1180268 A FR 1180268A
Authority
FR
France
Prior art keywords
focal lens
focal
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
Other languages
French (fr)
Inventor
Hans Ruehle
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.)
Zeiss Ikon AG
Original Assignee
Zeiss Ikon 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 Zeiss Ikon AG filed Critical Zeiss Ikon AG
Application granted granted Critical
Publication of FR1180268A publication Critical patent/FR1180268A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
    • G02C7/00—Optical parts
    • G02C7/02—Lenses; Lens systems ; Methods of designing lenses
    • G02C7/06—Lenses; Lens systems ; Methods of designing lenses bifocal; multifocal ; progressive
FR1180268D 1956-07-28 1957-07-29 Multi-focal lens Expired FR1180268A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1180268X 1956-07-28

Publications (1)

Publication Number Publication Date
FR1180268A true FR1180268A (en) 1959-06-03

Family

ID=7730164

Family Applications (1)

Application Number Title Priority Date Filing Date
FR1180268D Expired FR1180268A (en) 1956-07-28 1957-07-29 Multi-focal lens

Country Status (1)

Country Link
FR (1) FR1180268A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2550351A1 (en) * 1983-08-02 1985-02-08 Pentacon Dresden Veb Fresnel focus plate for SLR camera
EP0343067A1 (en) * 1988-05-19 1989-11-23 ESSILOR INTERNATIONAL Compagnie Générale d'Optique Diffractive lens with a composite profile

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2550351A1 (en) * 1983-08-02 1985-02-08 Pentacon Dresden Veb Fresnel focus plate for SLR camera
EP0343067A1 (en) * 1988-05-19 1989-11-23 ESSILOR INTERNATIONAL Compagnie Générale d'Optique Diffractive lens with a composite profile
FR2631713A1 (en) * 1988-05-19 1989-11-24 Essilor Int DIFFRACTIVE LENS WITH MIXED PROFILE

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