JPS53125834A - Reflecting type screen for film reader - Google Patents
Reflecting type screen for film readerInfo
- 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
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
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 |
FR7806814A FR2383460B1 (en) | 1977-03-10 | 1978-03-09 | Viewer |
GB9403/78A GB1603691A (en) | 1977-03-10 | 1978-03-09 | Film reader |
GB38565/80A GB1603692A (en) | 1977-03-10 | 1978-03-09 | Projection screen |
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01161228A (en) * | 1987-10-06 | 1989-06-23 | Philips Gloeilampenfab:Nv | Front projection screen |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4854934A (en) * | 1971-11-08 | 1973-08-02 |
-
1977
- 1977-04-11 JP JP4109277A patent/JPS53125834A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4854934A (en) * | 1971-11-08 | 1973-08-02 |
Cited By (1)
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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