JPH0344372U - - Google Patents
Info
- Publication number
- JPH0344372U JPH0344372U JP10210589U JP10210589U JPH0344372U JP H0344372 U JPH0344372 U JP H0344372U JP 10210589 U JP10210589 U JP 10210589U JP 10210589 U JP10210589 U JP 10210589U JP H0344372 U JPH0344372 U JP H0344372U
- Authority
- JP
- Japan
- Prior art keywords
- line sensor
- reading device
- image reading
- brightness level
- optical system
- 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
- 239000003550 marker Substances 0.000 claims description 5
- 238000003705 background correction Methods 0.000 claims description 3
- 239000013307 optical fiber Substances 0.000 claims description 2
- 230000003287 optical effect Effects 0.000 claims 6
- 238000010586 diagram Methods 0.000 description 5
Description
第１図は本考案による画像読み取り装置の第１
実施例を示す斜視図、第２図は第１実施例を示す
ブロツク図、第３図は第２実施例を示すブロツク
図、第４図は第３実施例を示すブロツク図、第５
図は従来の画像読み取り装置を示す斜視図、第６
図は従来の画像読み取り装置を示すブロツク図、
第７図は従来の画像読み取り装置を示すブロツク
図である。
１……蛍光灯、１０１……レンズ、２……原稿
、３……ＣＣＤセンサ、４……基準電圧発生回路
、５……Ａ／Ｄコンバータ、６……シエーデイン
グ補正用メモリ、７……Ｄ／Ａコンバータ、８…
…白マーカ、８０……キヤリツジ、９……増幅回
路、１０……サンプルホールド回路、１１……増
幅回路、１２……サンプルホールド回路、１３…
…Ｄ／Ａコンバータ、１４……Ａ／Ｄコンバータ
、１５……光フアイバ。
Figure 1 shows the first image reading device according to the present invention.
FIG. 2 is a block diagram showing the first embodiment; FIG. 3 is a block diagram showing the second embodiment; FIG. 4 is a block diagram showing the third embodiment;
The figure is a perspective view showing a conventional image reading device.
The figure shows a block diagram of a conventional image reading device.
FIG. 7 is a block diagram showing a conventional image reading device. 1...Fluorescent lamp, 101...Lens, 2...Original, 3...CCD sensor, 4...Reference voltage generation circuit, 5...A/D converter, 6...Shading correction memory, 7...D /A converter, 8...
...white marker, 80...carriage, 9...amplifier circuit, 10...sample hold circuit, 11...amplifier circuit, 12...sample hold circuit, 13...
...D/A converter, 14...A/D converter, 15...optical fiber.
Claims (1)
ンサーで行い、副走査を光学系の移動によつて行
う画像読み取り装置であつて、前記光学系内に白
輝度レベル基準用白マーカーを備え、この白マー
カーの像を前記ＣＣＤラインセンサーの端部に結
像させ、その輝度レベルを読み取る手段と、この
輝度レベルにもとずいて、Ａ／Ｄコンバータの基
準電圧を生成することを特徴とする画像読み取り
装置。 (2) 蛍光灯を光源とし主走査をＣＣＤラインセ
ンサーで行い、副走査を光学系の移動によつて行
う画像読み取り装置であつて、前記光学系内に白
輝度レベル基準用白マーカーを備え、この白マー
カーの像を前記ＣＣＤラインセンサーの端部に結
像させ、その輝度レベルを読み取る手段と、この
輝度レベルにもとずいて、シエーデイング補正用
のＤ／Ａコンバータの基準電圧を生成することを
特徴とする画像読み取り装置。 (3) 蛍光灯を光源とし主走査をＣＣＤラインセ
ンサーで行い、副走査を光学系の移動によつて行
う画像読み取り装置であつて、前記蛍光灯の光の
一部を光フアイバにて前記ＣＣＤラインセンサー
の端部に導き、その輝度レベルを読み取る手段と
、この輝度レベルにもとずいて、Ａ／Ｄコンバー
タの基準電圧を生成することを特徴とする画像読
み取り装置。 (4) 蛍光灯を光源とし主走査をＣＣＤラインセ
ンサーで行い、副走査を光学系の移動によつて行
う画像読み取り装置であつて、前記蛍光灯の光の
一部を一つもしくは複数の光フアイバにて前記Ｃ
ＣＤラインセンサーの端部に導き、その輝度レベ
ルを読み取る手段と、この輝度レベルにもとずい
て、シエーデイング補正用のＤ／Ａコンバータの
基準電圧を生成することを特徴とする画像読み取
り装置。[Claims for Utility Model Registration] (1) An image reading device that uses a fluorescent lamp as a light source, performs main scanning with a CCD line sensor, and performs sub-scanning by moving an optical system, which includes a white luminance sensor in the optical system. A white marker for level reference is provided, an image of the white marker is formed on the end of the CCD line sensor to read the brightness level, and a reference voltage for the A/D converter is determined based on the brightness level. An image reading device characterized in that it generates. (2) An image reading device using a fluorescent lamp as a light source, performing main scanning with a CCD line sensor, and performing sub-scanning by moving an optical system, comprising a white marker for a white luminance level reference in the optical system, means for forming an image of the white marker on an end of the CCD line sensor and reading its brightness level; and generating a reference voltage for a D/A converter for shading correction based on this brightness level. An image reading device characterized by: (3) An image reading device that uses a fluorescent lamp as a light source and performs main scanning with a CCD line sensor and sub-scanning by moving an optical system, in which a part of the light from the fluorescent lamp is transmitted to the CCD line sensor through an optical fiber. An image reading device comprising: means for guiding an end of a line sensor to read its brightness level; and generating a reference voltage for an A/D converter based on the brightness level. (4) An image reading device that uses a fluorescent lamp as a light source, performs main scanning with a CCD line sensor, and performs sub-scanning by moving an optical system, in which a portion of the light from the fluorescent lamp is replaced by one or more lights. The above C
An image reading device comprising: a means for leading to an end of a CD line sensor and reading its brightness level; and generating a reference voltage for a D/A converter for shading correction based on the brightness level.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10210589U JPH0344372U (en) | 1989-08-31 | 1989-08-31 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10210589U JPH0344372U (en) | 1989-08-31 | 1989-08-31 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0344372U true JPH0344372U (en) | 1991-04-24 |
Family
ID=31651024
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10210589U Pending JPH0344372U (en) | 1989-08-31 | 1989-08-31 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0344372U (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5999439A (en) * | 1982-10-09 | 1984-06-08 | ドクトル−インジエニエ−ル・ル−ドルフ・ヘル・ゲゼルシヤフト・ミツト・ベシユレンクテル・ハフツング | Scanning and duplication method and apparatus for original |
| JPS61257069A (en) * | 1985-05-10 | 1986-11-14 | Hitachi Ltd | Correcting method for quantity of light variation |
-
1989
- 1989-08-31 JP JP10210589U patent/JPH0344372U/ja active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5999439A (en) * | 1982-10-09 | 1984-06-08 | ドクトル−インジエニエ−ル・ル−ドルフ・ヘル・ゲゼルシヤフト・ミツト・ベシユレンクテル・ハフツング | Scanning and duplication method and apparatus for original |
| JPS61257069A (en) * | 1985-05-10 | 1986-11-14 | Hitachi Ltd | Correcting method for quantity of light variation |
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