JPS55161226A - Microreader - Google Patents
MicroreaderInfo
- Publication number
- JPS55161226A JPS55161226A JP6845579A JP6845579A JPS55161226A JP S55161226 A JPS55161226 A JP S55161226A JP 6845579 A JP6845579 A JP 6845579A JP 6845579 A JP6845579 A JP 6845579A JP S55161226 A JPS55161226 A JP S55161226A
- Authority
- JP
- Japan
- Prior art keywords
- heat
- light source
- fan
- microfilm
- evolved
- 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
- Projection Apparatus (AREA)
Abstract
PURPOSE: To make possible the faithful reproduction and observation of the subtle gradation of film by adequately disposing heat-radiation fins, cold mirror and heat- ray-absorbing glass and removing the heat evolved from a light source of large quantity of light by the use of fans.
CONSTITUTION: A light source part A and condensing part B are contained in the same spacing 10 and a feed fan 12a and exhaust fan 12b are provided at its inlet part. The heat and heat rays evolved by a light source lamp 1 are absorbed by heat radiation fins 3, 7, cold mirror 6 and heat-ray glass 8 and are exhausted to the outside by the flow of air by the feed fan 12a and exhaust fan 12b. In addition, the radiation heat accumulated in the black portions of the microfilm placed on the stage plate C of the projection part is cooled by the blast from a cooling fan 17. The subtle gradation of the microfilm is then faithfully reproduced on the screen 22 in the projection part D and is thereby observed.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6845579A JPS55161226A (en) | 1979-06-01 | 1979-06-01 | Microreader |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6845579A JPS55161226A (en) | 1979-06-01 | 1979-06-01 | Microreader |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55161226A true JPS55161226A (en) | 1980-12-15 |
Family
ID=13374181
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP6845579A Pending JPS55161226A (en) | 1979-06-01 | 1979-06-01 | Microreader |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55161226A (en) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS432845Y1 (en) * | 1965-09-11 | 1968-02-06 | ||
JPH052392U (en) * | 1991-06-27 | 1993-01-14 | 日本電気株式会社 | Surface mount connector |
-
1979
- 1979-06-01 JP JP6845579A patent/JPS55161226A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS432845Y1 (en) * | 1965-09-11 | 1968-02-06 | ||
JPH052392U (en) * | 1991-06-27 | 1993-01-14 | 日本電気株式会社 | Surface mount connector |
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