JPS6417531U - - Google Patents

Info

Publication number
JPS6417531U
JPS6417531U JP11158187U JP11158187U JPS6417531U JP S6417531 U JPS6417531 U JP S6417531U JP 11158187 U JP11158187 U JP 11158187U JP 11158187 U JP11158187 U JP 11158187U JP S6417531 U JPS6417531 U JP S6417531U
Authority
JP
Japan
Prior art keywords
imaging lens
prism surface
center point
reflective fresnel
lens
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
JP11158187U
Other languages
English (en)
Japanese (ja)
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 JP11158187U priority Critical patent/JPS6417531U/ja
Publication of JPS6417531U publication Critical patent/JPS6417531U/ja
Pending legal-status Critical Current

Links

Landscapes

  • Overhead Projectors And Projection Screens (AREA)
JP11158187U 1987-07-21 1987-07-21 Pending JPS6417531U (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11158187U JPS6417531U (zh) 1987-07-21 1987-07-21

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11158187U JPS6417531U (zh) 1987-07-21 1987-07-21

Publications (1)

Publication Number Publication Date
JPS6417531U true JPS6417531U (zh) 1989-01-27

Family

ID=31349751

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11158187U Pending JPS6417531U (zh) 1987-07-21 1987-07-21

Country Status (1)

Country Link
JP (1) JPS6417531U (zh)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5557840A (en) * 1978-10-24 1980-04-30 Gakken Co Ltd Overhead projector capable of projecting on vertical plane

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5557840A (en) * 1978-10-24 1980-04-30 Gakken Co Ltd Overhead projector capable of projecting on vertical plane

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