JPS53125834A - Reflecting type screen for film reader - Google Patents

Reflecting type screen for film reader

Info

Publication number
JPS53125834A
JPS53125834A JP4109277A JP4109277A JPS53125834A JP S53125834 A JPS53125834 A JP S53125834A JP 4109277 A JP4109277 A JP 4109277A JP 4109277 A JP4109277 A JP 4109277A JP S53125834 A JPS53125834 A JP S53125834A
Authority
JP
Japan
Prior art keywords
type screen
reflecting type
film reader
screen
reader
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
JP4109277A
Other languages
Japanese (ja)
Inventor
Hiroaki Suzuki
Mutsukimi Inoue
Toshio Arai
Kokichi Asazeki
Hisashi Yamada
Tetsuo Kuwayama
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.)
Canon Inc
Original Assignee
Canon Inc
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 Canon Inc filed Critical Canon Inc
Priority to JP4109277A priority Critical patent/JPS53125834A/en
Priority to US05/884,536 priority patent/US4229085A/en
Priority to GB38565/80A priority patent/GB1603692A/en
Priority to FR7806814A priority patent/FR2383460B1/en
Priority to GB9403/78A priority patent/GB1603691A/en
Publication of JPS53125834A publication Critical patent/JPS53125834A/en
Priority to US06/132,879 priority patent/US4339183A/en
Pending legal-status Critical Current

Links

Landscapes

  • Overhead Projectors And Projection Screens (AREA)

Abstract

PURPOSE: To improve the contrast of an image by making a screen of a preset material and by forming the screen with a Fresnel surface.
COPYRIGHT: (C)1978,JPO&Japio
JP4109277A 1977-03-10 1977-04-11 Reflecting type screen for film reader Pending JPS53125834A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
JP4109277A JPS53125834A (en) 1977-04-11 1977-04-11 Reflecting type screen for film reader
US05/884,536 US4229085A (en) 1977-03-10 1978-03-08 Film reader
GB38565/80A GB1603692A (en) 1977-03-10 1978-03-09 Projection screen
FR7806814A FR2383460B1 (en) 1977-03-10 1978-03-09 Viewer
GB9403/78A GB1603691A (en) 1977-03-10 1978-03-09 Film reader
US06/132,879 US4339183A (en) 1977-03-10 1980-03-24 Film reader

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4109277A JPS53125834A (en) 1977-04-11 1977-04-11 Reflecting type screen for film reader

Publications (1)

Publication Number Publication Date
JPS53125834A true JPS53125834A (en) 1978-11-02

Family

ID=12598824

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4109277A Pending JPS53125834A (en) 1977-03-10 1977-04-11 Reflecting type screen for film reader

Country Status (1)

Country Link
JP (1) JPS53125834A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01161228A (en) * 1987-10-06 1989-06-23 Philips Gloeilampenfab:Nv Front projection screen

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4854934A (en) * 1971-11-08 1973-08-02

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4854934A (en) * 1971-11-08 1973-08-02

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01161228A (en) * 1987-10-06 1989-06-23 Philips Gloeilampenfab:Nv Front projection screen

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