JPH0485871U - - Google Patents
Info
- Publication number
- JPH0485871U JPH0485871U JP12508590U JP12508590U JPH0485871U JP H0485871 U JPH0485871 U JP H0485871U JP 12508590 U JP12508590 U JP 12508590U JP 12508590 U JP12508590 U JP 12508590U JP H0485871 U JPH0485871 U JP H0485871U
- Authority
- JP
- Japan
- Prior art keywords
- reading device
- color image
- image reading
- image sensor
- document
- 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 3
- 239000011521 glass Substances 0.000 claims 2
- 230000003287 optical effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 5
- 230000035945 sensitivity Effects 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
Landscapes
- Color Electrophotography (AREA)
- Facsimile Scanning Arrangements (AREA)
Description
第１図は本考案一実施例の構成を示す図、第２
図は本考案他の実施例の構成を示す図、第３図は
本考案が適用されるフルカラー複写機の全体構成
を示す図、第４図Ａ〜Ｃは本考案実施例に採用し
た赤外線カツトフイルタの特性を示す図、第５図
Ａ〜Ｃは第４図Ａ〜Ｃに示した特性を有するフイ
ルタによる赤外発光成分の除去特性を理論的に求
めた図、第６図は昼光色蛍光ランプの点燈直後に
おける分光分布特性を示す図、第７図はＣＣＤセ
ンサの相対分光感度の一例を示す図である。
４１……蛍光ランプ、４７……ＣＣＤセンサ、
４８……セルホツクレンズ、５０……原稿、５１
……赤外線カツトフイルタ。
Figure 1 is a diagram showing the configuration of one embodiment of the present invention, Figure 2 is a diagram showing the configuration of an embodiment of the present invention.
3 shows the overall structure of a full-color copying machine to which the invention is applied; FIGS. 4A to 4C show an infrared cut filter adopted in an embodiment of the invention. Figures 5A-C are diagrams theoretically determining the removal characteristics of infrared light emitting components by a filter having the characteristics shown in Figures 4A-C, and Figure 6 is a diagram showing the characteristics of a daylight fluorescent lamp. FIG. 7 is a diagram showing an example of the relative spectral sensitivity of a CCD sensor. 41...Fluorescent lamp, 47...CCD sensor,
48...Self cleanse, 50...Manuscript, 51
...Infrared cut filter.
Claims (1)
原稿面で反射した光を該イメージセンサに導く手
段とを具備してなるカラー画像読取装置において
、 前記照明手段から前記イメージセンサに至る光
路上に、赤外線カツト手段を設け、該照明手段の
赤外発光成分を該イメージセンサに入光させない
ようにしたことを特徴とするカラー画像読取装置
。 ２ 前記照明手段は蛍光ランプであることを特徴
とする請求項１に記載のカラー画像読取装置。 ３ 前記赤外線カツト手段は、概略６５０ｎｍよ
りも長波長域の光を減衰させる特性を有する色ガ
ラスフイルタであることを特徴とする請求項１又
は２に記載のカラー画像読取装置。 ４ 前記赤外線カツト手段は、概略６５０ｎｍよ
りも長波長域の光を減衰させる特性を有する干渉
膜フイルタであることを特徴とする請求項１又は
２に記載のカラー画像読取装置。 ５ 前記干渉膜フイルタを、照明手段の管壁、プ
ラテンガラス表面、集光用レンズ表面、又はミラ
ー表面のいずれかに一体形成したことを特徴とす
る請求項４に記載のカラー画像読取装置。[Scope of claims for utility model registration] 1. An image sensor, means for illuminating a document,
A color image reading device comprising a means for guiding light reflected on the surface of a document to the image sensor, wherein an infrared cut means is provided on an optical path from the illumination means to the image sensor, A color image reading device characterized in that a light emitting component is not allowed to enter the image sensor. 2. The color image reading device according to claim 1, wherein the illumination means is a fluorescent lamp. 3. The color image reading device according to claim 1, wherein the infrared cutting means is a colored glass filter having a characteristic of attenuating light in a wavelength range longer than approximately 650 nm. 4. The color image reading device according to claim 1, wherein the infrared cut means is an interference film filter having a characteristic of attenuating light in a wavelength range longer than about 650 nm. 5. The color image reading device according to claim 4, wherein the interference film filter is integrally formed on any one of a tube wall of the illumination means, a platen glass surface, a condensing lens surface, or a mirror surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12508590U JPH0485871U (en) | 1990-11-29 | 1990-11-29 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12508590U JPH0485871U (en) | 1990-11-29 | 1990-11-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0485871U true JPH0485871U (en) | 1992-07-27 |
Family
ID=31872705
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12508590U Pending JPH0485871U (en) | 1990-11-29 | 1990-11-29 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0485871U (en) |
-
1990
- 1990-11-29 JP JP12508590U patent/JPH0485871U/ja active Pending
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