JPH044456U - - Google Patents
Info
- Publication number
- JPH044456U JPH044456U JP4527990U JP4527990U JPH044456U JP H044456 U JPH044456 U JP H044456U JP 4527990 U JP4527990 U JP 4527990U JP 4527990 U JP4527990 U JP 4527990U JP H044456 U JPH044456 U JP H044456U
- Authority
- JP
- Japan
- Prior art keywords
- light
- transmitted
- image reading
- light source
- reading device
- 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
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 230000003595 spectral effect Effects 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 3
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
Landscapes
- Facsimile Scanning Arrangements (AREA)
Description
第１図Ａ及びＢは本考案になる画像読取り装置
の一実施例を示す構成図、第２図は光源への印加
電圧の発光特性（光量と色温度）との関係を示す
図、第３図は従来例を示す構成図である。
１……原稿、１ａ……フイルム、１ｂ……原稿
、４……ラインセンサ（読取り手段）、５Ｒ，５
Ｇ，５Ｂ……Ａ／Ｄ変換回路、２０ａ……ハロゲ
ンランプ（光源）、２０ｂ……蛍光灯（光源）、
２１……（半固定）抵抗器、２２……制御スイツ
チ、２３……分光センサ、２４Ｒ，２４Ｇ，２４
Ｂ……制御回路、ＶＨ，ＶＬ……光源への印加電
圧、ＶＲ，ＶＧ，ＶＢ……基準電圧（リフアレン
ス電圧）。
1A and 1B are block diagrams showing one embodiment of the image reading device according to the present invention; FIG. 2 is a diagram showing the relationship between the voltage applied to the light source and the light emission characteristics (light amount and color temperature); The figure is a configuration diagram showing a conventional example. 1... Original, 1a... Film, 1b... Original, 4... Line sensor (reading means), 5R, 5
G, 5B...A/D conversion circuit, 20a...Halogen lamp (light source), 20b...Fluorescent lamp (light source),
21...(semi-fixed) resistor, 22...control switch, 23...spectral sensor, 24R, 24G, 24
B... Control circuit, VH, VL... Voltage applied to the light source, VR, VG, VB... Reference voltage.
Claims (1)
または反射）した透過光（または反射光）を読取
る画像読取り装置において、 被読取り原稿が、ネガフイルムであるかポジフ
イルムであるかに応じて、光源への印加電圧を変
化させるようにしたことを特徴とする画像読取り
装置。 (2) 光源から発光され、被読取り原稿を反射（
または透過）した反射光（または透過光）を読取
る画像読取り装置において、 前記反射光（または透過光）を電気信号に変換
する読取り手段と、 前記読取り手段の出力をアナログ・デジタル変
換するＡ／Ｄ変換回路と、 前記光源に配設された分光センサと、 前記分光センサに出力に応じた制御電圧を生成
して、前記Ａ／Ｄ変換回路の基準電圧として供給
する制御回路とからなることを特徴とする画像読
取り装置。[Scope of claims for utility model registration] (1) Light emitted from a light source and transmitted through the original to be read (
In an image reading device that reads transmitted light (or reflected light), the voltage applied to the light source is changed depending on whether the original to be read is a negative film or a positive film. Characteristic image reading device. (2) Light is emitted from the light source and reflected on the original to be read (
An image reading device that reads reflected light (or transmitted light) that has been transmitted (or transmitted light), comprising a reading means that converts the reflected light (or transmitted light) into an electrical signal, and an A/D that converts the output of the reading means from analog to digital. A conversion circuit, a spectral sensor disposed in the light source, and a control circuit that generates a control voltage according to the output of the spectral sensor and supplies it as a reference voltage to the A/D conversion circuit. image reading device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4527990U JPH044456U (en) | 1990-04-27 | 1990-04-27 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4527990U JPH044456U (en) | 1990-04-27 | 1990-04-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH044456U true JPH044456U (en) | 1992-01-16 |
Family
ID=31559312
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4527990U Pending JPH044456U (en) | 1990-04-27 | 1990-04-27 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH044456U (en) |
-
1990
- 1990-04-27 JP JP4527990U patent/JPH044456U/ja active Pending
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