JPS56144427A - Production of reflection surface for reflection type screen - Google Patents
Production of reflection surface for reflection type screenInfo
- Publication number
- JPS56144427A JPS56144427A JP4897080A JP4897080A JPS56144427A JP S56144427 A JPS56144427 A JP S56144427A JP 4897080 A JP4897080 A JP 4897080A JP 4897080 A JP4897080 A JP 4897080A JP S56144427 A JPS56144427 A JP S56144427A
- Authority
- JP
- Japan
- Prior art keywords
- rolling direction
- ruggedness
- fine
- reflection
- rolling
- 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
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/54—Accessories
- G03B21/56—Projection screens
- G03B21/60—Projection screens characterised by the nature of the surface
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Overhead Projectors And Projection Screens (AREA)
Abstract
PURPOSE:To increase the effective diffusion angle in the direction parallel to the rolling direction and provide superior characteristics as a reflection surface by imparting the fine ruggedness to a commercially marketed rolled aluminum sheet roughly at a right angle to the rolling direction. CONSTITUTION:Fine rolling flaws exist in a commercially marketed rolled aluminum sheet in its rolling direction, and in this state, the effective diffusion angle in the direction parallel to the rolling direction is narrow and this state is inadequate as a reflection surface for reflection type screens. Thereupon, fine ruggedness is given thereto roughly at right angles to the rolling direction. Further, it is equally well to impart fine ruggedness also to the direction parallel with the rolling direction. The characteristic of the ruggedness is 0.5-5mum depth, more preferably 1- 3mum, and about 10-1,000 pieces per cm. The ruggedness may be given easily by brushing. If the surface is chemically or electrochemically polished after having been rugged, the reflectance improves considerably.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4897080A JPS56144427A (en) | 1980-04-14 | 1980-04-14 | Production of reflection surface for reflection type screen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4897080A JPS56144427A (en) | 1980-04-14 | 1980-04-14 | Production of reflection surface for reflection type screen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS56144427A true JPS56144427A (en) | 1981-11-10 |
Family
ID=12818125
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4897080A Pending JPS56144427A (en) | 1980-04-14 | 1980-04-14 | Production of reflection surface for reflection type screen |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS56144427A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008209867A (en) | 2007-02-28 | 2008-09-11 | Mitsubishi Rayon Co Ltd | Stamper, glare-proof antireflection article, and its manufacturing method |
-
1980
- 1980-04-14 JP JP4897080A patent/JPS56144427A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008209867A (en) | 2007-02-28 | 2008-09-11 | Mitsubishi Rayon Co Ltd | Stamper, glare-proof antireflection article, and its manufacturing method |
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