FR883385A - Stepped lens lighting device - Google Patents

Stepped lens lighting device

Info

Publication number
FR883385A
FR883385A FR883385DA FR883385A FR 883385 A FR883385 A FR 883385A FR 883385D A FR883385D A FR 883385DA FR 883385 A FR883385 A FR 883385A
Authority
FR
France
Prior art keywords
lighting device
stepped lens
lens lighting
stepped
lighting
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.)
Klangfilm GmbH
Original Assignee
Klangfilm 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 Klangfilm GmbH filed Critical Klangfilm GmbH
Application granted granted Critical
Publication of FR883385A publication Critical patent/FR883385A/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
    • G02B3/08—Simple or compound lenses with non-spherical faces with discontinuous faces, e.g. Fresnel lens

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
FR883385D 1940-01-10 1942-06-18 Stepped lens lighting device Expired FR883385A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE883385X 1940-01-10

Publications (1)

Publication Number Publication Date
FR883385A true FR883385A (en) 1943-07-02

Family

ID=6832009

Family Applications (1)

Application Number Title Priority Date Filing Date
FR883385D Expired FR883385A (en) 1940-01-10 1942-06-18 Stepped lens lighting device

Country Status (1)

Country Link
FR (1) FR883385A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2426075A (en) * 2005-05-12 2006-11-15 Everspring Ind Co Ltd Thin-type spherical lens having a discontinuous face

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2426075A (en) * 2005-05-12 2006-11-15 Everspring Ind Co Ltd Thin-type spherical lens having a discontinuous face
GB2426075B (en) * 2005-05-12 2007-12-05 Everspring Ind Co Ltd Thin-type spherical lens

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