JPS6481102A - Fresnel prism of lighting appliance lens - Google Patents

Fresnel prism of lighting appliance lens

Info

Publication number
JPS6481102A
JPS6481102A JP62237279A JP23727987A JPS6481102A JP S6481102 A JPS6481102 A JP S6481102A JP 62237279 A JP62237279 A JP 62237279A JP 23727987 A JP23727987 A JP 23727987A JP S6481102 A JPS6481102 A JP S6481102A
Authority
JP
Japan
Prior art keywords
die
prism
lens
fresnel prism
fresnel
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.)
Pending
Application number
JP62237279A
Other languages
Japanese (ja)
Inventor
Akio Kato
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.)
Ichikoh Industries Ltd
Original Assignee
Ichikoh 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 Ichikoh Industries Ltd filed Critical Ichikoh Industries Ltd
Priority to JP62237279A priority Critical patent/JPS6481102A/en
Publication of JPS6481102A publication Critical patent/JPS6481102A/en
Pending legal-status Critical Current

Links

Landscapes

  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

PURPOSE: To reduce a manufacturing cost by forming a Fresnel prism by approximating a concentric circle to a regular polygon. CONSTITUTION: A parallel prism die piece 1 is formed in a triangle shape, and a parallel prism 1a is engraved. This die piece 1 is combined into a pseudo concentric circle Fresnel prism, and is cut out by matching it to a shape of a die 2. When a lens for a vehicle lamp is molded by a resin material, the prism die 2 and a die for other parts are combined into a die for manufacturing a lens, and a regular polygonal Fresnel prism is engraved on a part of its surface by molding the lens. By this structure, a die for molding a prism can be easily produced and its cost can be reduced.
JP62237279A 1987-09-24 1987-09-24 Fresnel prism of lighting appliance lens Pending JPS6481102A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62237279A JPS6481102A (en) 1987-09-24 1987-09-24 Fresnel prism of lighting appliance lens

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62237279A JPS6481102A (en) 1987-09-24 1987-09-24 Fresnel prism of lighting appliance lens

Publications (1)

Publication Number Publication Date
JPS6481102A true JPS6481102A (en) 1989-03-27

Family

ID=17013035

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62237279A Pending JPS6481102A (en) 1987-09-24 1987-09-24 Fresnel prism of lighting appliance lens

Country Status (1)

Country Link
JP (1) JPS6481102A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010073310A (en) * 2008-09-16 2010-04-02 Stanley Electric Co Ltd Illuminating device

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5915901A (en) * 1982-05-26 1984-01-27 アンリ−アレクサンドル・ジロ− Frensnel lens and application especially for focusing apparatus

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5915901A (en) * 1982-05-26 1984-01-27 アンリ−アレクサンドル・ジロ− Frensnel lens and application especially for focusing apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010073310A (en) * 2008-09-16 2010-04-02 Stanley Electric Co Ltd Illuminating device

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