FR870188A - élément optique - Google Patents

élément optique

Info

Publication number
FR870188A
FR870188A FR870188DA FR870188A FR 870188 A FR870188 A FR 870188A FR 870188D A FR870188D A FR 870188DA FR 870188 A FR870188 A FR 870188A
Authority
FR
France
Prior art keywords
optical element
optical
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
English (en)
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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 Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Application granted granted Critical
Publication of FR870188A publication Critical patent/FR870188A/fr
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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
FR870188D 1939-10-10 1941-02-20 élément optique Expired FR870188A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL870188X 1939-10-10

Publications (1)

Publication Number Publication Date
FR870188A true FR870188A (fr) 1942-03-04

Family

ID=19850436

Family Applications (1)

Application Number Title Priority Date Filing Date
FR870188D Expired FR870188A (fr) 1939-10-10 1941-02-20 élément optique

Country Status (1)

Country Link
FR (1) FR870188A (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2530742A (en) * 1941-07-19 1950-11-21 Hartford Nat Bank & Trust Co Process of manufacturing an optical element
DE1077818B (de) * 1959-02-12 1960-03-17 Leuna Werke Iawalter Ulbrichti Verfahren zur Verhinderung von Verkrustungen an heissen Waenden bei der Verarbeitungvon Erdoel-, Teer- u. ae. Produkten

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2530742A (en) * 1941-07-19 1950-11-21 Hartford Nat Bank & Trust Co Process of manufacturing an optical element
DE1077818B (de) * 1959-02-12 1960-03-17 Leuna Werke Iawalter Ulbrichti Verfahren zur Verhinderung von Verkrustungen an heissen Waenden bei der Verarbeitungvon Erdoel-, Teer- u. ae. Produkten

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