JPS6423040U - - Google Patents
Info
- Publication number
- JPS6423040U JPS6423040U JP11506587U JP11506587U JPS6423040U JP S6423040 U JPS6423040 U JP S6423040U JP 11506587 U JP11506587 U JP 11506587U JP 11506587 U JP11506587 U JP 11506587U JP S6423040 U JPS6423040 U JP S6423040U
- Authority
- JP
- Japan
- Prior art keywords
- light source
- fresnel lens
- temperature
- overhead projector
- heated
- 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
- 230000003287 optical effect Effects 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 3
Landscapes
- Overhead Projectors And Projection Screens (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11506587U JPS6423040U (de) | 1987-07-29 | 1987-07-29 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11506587U JPS6423040U (de) | 1987-07-29 | 1987-07-29 |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6423040U true JPS6423040U (de) | 1989-02-07 |
Family
ID=31356380
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11506587U Pending JPS6423040U (de) | 1987-07-29 | 1987-07-29 |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6423040U (de) |
-
1987
- 1987-07-29 JP JP11506587U patent/JPS6423040U/ja active Pending
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