JPS626201B2 - - Google Patents

Info

Publication number
JPS626201B2
JPS626201B2 JP55046397A JP4639780A JPS626201B2 JP S626201 B2 JPS626201 B2 JP S626201B2 JP 55046397 A JP55046397 A JP 55046397A JP 4639780 A JP4639780 A JP 4639780A JP S626201 B2 JPS626201 B2 JP S626201B2
Authority
JP
Japan
Prior art keywords
fresnel lens
lens sheet
constitution
rising surface
light
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
JP55046397A
Other languages
English (en)
Japanese (ja)
Other versions
JPS56142501A (en
Inventor
Yoshiharu Yamamoto
Yoshitomi Nagaoka
Yasuo Nakajima
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP4639780A priority Critical patent/JPS56142501A/ja
Publication of JPS56142501A publication Critical patent/JPS56142501A/ja
Publication of JPS626201B2 publication Critical patent/JPS626201B2/ja
Granted 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)
  • Overhead Projectors And Projection Screens (AREA)
JP4639780A 1980-04-08 1980-04-08 Fresnel lens sheet Granted JPS56142501A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4639780A JPS56142501A (en) 1980-04-08 1980-04-08 Fresnel lens sheet

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4639780A JPS56142501A (en) 1980-04-08 1980-04-08 Fresnel lens sheet

Publications (2)

Publication Number Publication Date
JPS56142501A JPS56142501A (en) 1981-11-06
JPS626201B2 true JPS626201B2 (ko) 1987-02-09

Family

ID=12746008

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4639780A Granted JPS56142501A (en) 1980-04-08 1980-04-08 Fresnel lens sheet

Country Status (1)

Country Link
JP (1) JPS56142501A (ko)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57124837U (ko) * 1981-01-28 1982-08-04
JPS597928A (ja) * 1982-07-06 1984-01-17 Alps Electric Co Ltd 透過形液晶表示装置
JPS61130903A (ja) * 1984-11-30 1986-06-18 Hitachi Ltd フレネルレンズとその製造方法
JPS61256337A (ja) * 1985-05-10 1986-11-13 Mitsubishi Rayon Co Ltd 背面投影スクリ−ン
JP2634778B2 (ja) * 1995-01-12 1997-07-30 株式会社日立製作所 フレネルレンズの製造方法
FR2799268B1 (fr) * 1999-09-30 2002-01-25 Valeo Vision Procede de fabrication d'elements dioptriques et elements dioptriques pour dispositif d'eclairage
JP5581127B2 (ja) * 2010-06-16 2014-08-27 株式会社エンプラス 光束制御部材およびこれを備えた光学装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2200646A (en) * 1938-02-28 1940-05-14 John D Strong Transparent projection screen
JPS50125755A (ko) * 1974-03-19 1975-10-03
JPS5117452A (ja) * 1974-08-02 1976-02-12 Ichiro Hosaka Furenerurenzu

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2200646A (en) * 1938-02-28 1940-05-14 John D Strong Transparent projection screen
JPS50125755A (ko) * 1974-03-19 1975-10-03
JPS5117452A (ja) * 1974-08-02 1976-02-12 Ichiro Hosaka Furenerurenzu

Also Published As

Publication number Publication date
JPS56142501A (en) 1981-11-06

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