JPS6149342U - - Google Patents
Info
- Publication number
- JPS6149342U JPS6149342U JP13272584U JP13272584U JPS6149342U JP S6149342 U JPS6149342 U JP S6149342U JP 13272584 U JP13272584 U JP 13272584U JP 13272584 U JP13272584 U JP 13272584U JP S6149342 U JPS6149342 U JP S6149342U
- Authority
- JP
- Japan
- Prior art keywords
- platen
- light
- flash
- housing
- illumination means
- 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
- 238000005286 illumination Methods 0.000 claims description 4
- 238000003384 imaging method Methods 0.000 claims description 3
- 230000003287 optical effect Effects 0.000 claims description 2
- 230000002093 peripheral effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 4
Landscapes
- Exposure Or Original Feeding In Electrophotography (AREA)
- Projection-Type Copiers In General (AREA)
- Light Sources And Details Of Projection-Printing Devices (AREA)
Description
第１図はこの考案に係る複写機の露光装置の一
実施例を示す斜視説明図、第２図は第１図中−
線断面図、第３図ａは第２図中−線に沿う
部位における一のフラツシユ光源からの照射光に
基づく光量Ｐの分布を示す説明図、第３図ｂ及び
ｃは第２図中−線及びＺ−Ｚ線に沿う部位に
おける光量Ｐの分布を示す説明図、第４図は従来
における複写機の露光装置の一例を示す断面説明
図、第５図ａ乃至ｃは第４図中−線、Ｙ−Ｙ
線及びＺ−Ｚ線に沿う部位における光量Ｐの分布
を示す説明図である。
〔符号説明〕、Ａ…照射領域、Ｓ…フラツシユ
照明手段、１…ハウジング、２…複写原稿、３…
プラテン、４…結像レンズ、７…感光面、１５，
１５ａ乃至１５ｄ…フラツシユ光源、１６，１６
ａ乃至１６ｄ…リフレクタ、１７…主光軸。
FIG. 1 is a perspective explanatory view showing an embodiment of the exposure device of a copying machine according to this invention, and FIG.
3a is an explanatory diagram showing the distribution of the amount of light P based on the irradiation light from one flash light source in a region along the line in FIG. 2, and FIGS. 3b and 3c are in the line An explanatory diagram showing the distribution of the amount of light P at a portion along the line and the Z-Z line, FIG. 4 is a cross-sectional explanatory diagram showing an example of an exposure device of a conventional copying machine, and FIGS. line, Y-Y
FIG. 3 is an explanatory diagram showing the distribution of the amount of light P at a portion along the line and the Z-Z line. [Description of symbols], A... Irradiation area, S... Flash illumination means, 1... Housing, 2... Copy original, 3...
platen, 4...imaging lens, 7...photosensitive surface, 15,
15a to 15d... Flash light source, 16, 16
a to 16d...Reflector, 17... Main optical axis.
Claims (1)
頂部に開設した矩形状の開口に装着されて複写原
稿の載置面を構成し且つ透過性部材で形成された
プラテンと、上記ハウジングの内部に配設されて
上記プラテン全面を瞬時に照明するフラツシユ照
明手段と、上記ハウジングの底部略中央に開設し
た孔に装着される結像レンズとを備え、上記フラ
ツシユ照明手段によつて照明されたプラテン上の
複写原稿の原像を上記結像レンズを介して所定の
感光面に投影するようにした複写機の露光装置に
おいて、上記フラツシユ照明手段は、上記プラテ
ンの各側縁に沿つて夫々設置されるフラツシユ光
源と、各フラツシユ光源の非プラテン側に夫々設
置されてフラツシユ光源からの光を反射させるリ
フレクタとを備え、上記各リフレクタには対応す
るプラテンの一側縁付近に向かう主光軸を設定す
ると共に、各フラツシユ光源からの照射光による
プラテン照射領域をプラテン中央部付近で相互に
重合させるように設定し、上記結像レンズの余弦
四乗則特性を補正し得るように、プラテンの周辺
光量をプラテンの中央光量より多く配分するよう
にしたことを特徴とする複写機の露光装置。 A housing having a closed cross-sectional structure, a platen which is attached to a rectangular opening provided at the top of the housing and forms a placement surface for a copy original and is made of a transparent member, and which is disposed inside the housing. a flash illumination means for instantaneously illuminating the entire surface of the platen, and an imaging lens mounted in a hole formed in the bottom center of the housing, and a copy document on the platen illuminated by the flash illumination means. In the exposure device for a copying machine, the flash illumination means includes flash light sources installed along each side edge of the platen. , a reflector that is installed on the non-platen side of each flash light source and reflects the light from the flash light source, and each reflector has a main optical axis directed toward the vicinity of one side edge of the corresponding platen. The platen irradiation area by the irradiation light from the flash light source is set to overlap with each other near the center of the platen, and the peripheral light amount of the platen is adjusted to the center of the platen so that the cosine fourth power characteristic of the imaging lens can be corrected. An exposure device for a copying machine characterized by distributing more light than the amount of light.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13272584U JPS6149342U (en) | 1984-09-03 | 1984-09-03 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13272584U JPS6149342U (en) | 1984-09-03 | 1984-09-03 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6149342U true JPS6149342U (en) | 1986-04-02 |
Family
ID=30691285
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13272584U Pending JPS6149342U (en) | 1984-09-03 | 1984-09-03 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6149342U (en) |
-
1984
- 1984-09-03 JP JP13272584U patent/JPS6149342U/ja active Pending
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