JPS5818201U - fresnel lens - Google Patents

fresnel lens

Info

Publication number
JPS5818201U
JPS5818201U JP11329681U JP11329681U JPS5818201U JP S5818201 U JPS5818201 U JP S5818201U JP 11329681 U JP11329681 U JP 11329681U JP 11329681 U JP11329681 U JP 11329681U JP S5818201 U JPS5818201 U JP S5818201U
Authority
JP
Japan
Prior art keywords
fresnel lens
light
entrance surface
diffuses
utility
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
JP11329681U
Other languages
Japanese (ja)
Inventor
敏彦 古川
Original Assignee
日本電気ホームエレクトロニクス株式会社
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 日本電気ホームエレクトロニクス株式会社 filed Critical 日本電気ホームエレクトロニクス株式会社
Priority to JP11329681U priority Critical patent/JPS5818201U/en
Publication of JPS5818201U publication Critical patent/JPS5818201U/en
Pending legal-status Critical Current

Links

Landscapes

  • Lenses (AREA)
  • Overhead Projectors And Projection Screens (AREA)

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

【図面の簡単な説明】[Brief explanation of drawings]

第１図は透過型映像拡大装置の斜視図、第２図は第１図
装置の断面図、第３図は本案の実施例に係るフレネルレ
ンズの部分拡大断面図である。 ａおよびｂ・・・・・・階段状入射面　３２・・・・・
・遮光層。 ２−FIG. 1 is a perspective view of a transmission type image enlarging device, FIG. 2 is a sectional view of the device shown in FIG. 1, and FIG. 3 is a partially enlarged sectional view of a Fresnel lens according to an embodiment of the present invention. a and b...Stepped entrance surface 32...
・Light blocking layer. 2-

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 階段状入射面のうち、入射光を拡散する方向に屈折させ
る面上に光を吸収する遮光層を形成してなるフレネルレ
ンズ。A Fresnel lens is formed by forming a light-shielding layer that absorbs light on a step-like entrance surface that refracts incident light in a direction that diffuses it.
JP11329681U 1981-07-29 1981-07-29 fresnel lens Pending JPS5818201U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11329681U JPS5818201U (en) 1981-07-29 1981-07-29 fresnel lens

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11329681U JPS5818201U (en) 1981-07-29 1981-07-29 fresnel lens

Publications (1)

Publication Number Publication Date
JPS5818201U true JPS5818201U (en) 1983-02-04

Family

ID=29907601

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11329681U Pending JPS5818201U (en) 1981-07-29 1981-07-29 fresnel lens

Country Status (1)

Country Link
JP (1) JPS5818201U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63125802U (en) * 1987-02-09 1988-08-17

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63125802U (en) * 1987-02-09 1988-08-17

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