JPH0128500Y2 - - Google Patents

Info

Publication number
JPH0128500Y2
JPH0128500Y2 JP1979155265U JP15526579U JPH0128500Y2 JP H0128500 Y2 JPH0128500 Y2 JP H0128500Y2 JP 1979155265 U JP1979155265 U JP 1979155265U JP 15526579 U JP15526579 U JP 15526579U JP H0128500 Y2 JPH0128500 Y2 JP H0128500Y2
Authority
JP
Japan
Prior art keywords
fresnel lens
lens
linear fresnel
focal length
screen
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
JP1979155265U
Other languages
English (en)
Japanese (ja)
Other versions
JPS5674432U (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html
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 filed Critical
Priority to JP1979155265U priority Critical patent/JPH0128500Y2/ja
Publication of JPS5674432U publication Critical patent/JPS5674432U/ja
Application granted granted Critical
Publication of JPH0128500Y2 publication Critical patent/JPH0128500Y2/ja
Expired legal-status Critical Current

Links

Landscapes

  • Overhead Projectors And Projection Screens (AREA)
  • Transforming Electric Information Into Light Information (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
JP1979155265U 1979-11-08 1979-11-08 Expired JPH0128500Y2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1979155265U JPH0128500Y2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1979-11-08 1979-11-08

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1979155265U JPH0128500Y2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1979-11-08 1979-11-08

Publications (2)

Publication Number Publication Date
JPS5674432U JPS5674432U (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1981-06-18
JPH0128500Y2 true JPH0128500Y2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1989-08-30

Family

ID=29667305

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1979155265U Expired JPH0128500Y2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1979-11-08 1979-11-08

Country Status (1)

Country Link
JP (1) JPH0128500Y2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH055748Y2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * 1984-10-22 1993-02-15
JPH055749Y2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * 1988-09-30 1993-02-15
JP3999612B2 (ja) * 2002-09-17 2007-10-31 株式会社リコー 背面投射用スクリーン
WO2006014407A2 (en) * 2004-07-06 2006-02-09 Luminoz Inc. Total internal reflection fresnel lens and devices

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE792745A (fr) * 1971-12-15 1973-03-30 Freen Ltd Ecran pour projection par transparence
JPS5189419A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * 1975-02-03 1976-08-05

Also Published As

Publication number Publication date
JPS5674432U (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1981-06-18

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