JPH0253660U - - Google Patents
Info
- Publication number
- JPH0253660U JPH0253660U JP13233088U JP13233088U JPH0253660U JP H0253660 U JPH0253660 U JP H0253660U JP 13233088 U JP13233088 U JP 13233088U JP 13233088 U JP13233088 U JP 13233088U JP H0253660 U JPH0253660 U JP H0253660U
- Authority
- JP
- Japan
- Prior art keywords
- document
- mirror
- reading device
- image reading
- reflectance
- 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
- 238000003384 imaging method Methods 0.000 claims description 2
- 230000003287 optical effect Effects 0.000 claims 2
- 238000005286 illumination Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 4
Landscapes
- Optical Systems Of Projection Type Copiers (AREA)
- Facsimile Scanning Arrangements (AREA)
- Facsimile Image Signal Circuits (AREA)
Description
第１図は、本考案の一実施例の構成図、第２図
は、レンズのｃｏｓ４θ則等による両端部付近の
光量低下の状態を示す図、第３図は、本考案に係
るミラーの反射率分布特性図、第４図は、レンズ
特性等をミラーの反射率特性で補正して得られる
センサ上の光量分布特性を示す図である。
１……原稿、２……光源、３……ミラー、４…
…結像レンズ、５……イメージセンサ、６……セ
ンサ駆動回路、７……信号処理回路。
Fig. 1 is a configuration diagram of an embodiment of the present invention, Fig. 2 is a diagram showing the state of decrease in light amount near both ends of the lens due to the cos 4 θ law, etc., and Fig. 3 is a diagram of the mirror according to the present invention. FIG. 4 is a diagram showing the light quantity distribution characteristic on the sensor obtained by correcting the lens characteristic etc. with the reflectance characteristic of the mirror. 1...Original, 2...Light source, 3...Mirror, 4...
...imaging lens, 5...image sensor, 6...sensor drive circuit, 7...signal processing circuit.
Claims (1)
更用ミラー、結像レンズを含む光学系を介してイ
メージセンサに結像し、原稿を読み取る画像読取
装置において、前記ミラーの反射率が中央部に比
較して端部で高くなるように分布していることを
特徴とする画像読取装置。 In an image reading device that irradiates a document with illumination light and images the reflected light on an image sensor through an optical system including an optical path changing mirror and an imaging lens to read the document, the reflectance of the mirror is at the center. An image reading device characterized in that the distribution is higher at the ends than at the edges.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13233088U JPH0253660U (en) | 1988-10-12 | 1988-10-12 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13233088U JPH0253660U (en) | 1988-10-12 | 1988-10-12 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0253660U true JPH0253660U (en) | 1990-04-18 |
Family
ID=31389192
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13233088U Pending JPH0253660U (en) | 1988-10-12 | 1988-10-12 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0253660U (en) |
-
1988
- 1988-10-12 JP JP13233088U patent/JPH0253660U/ja active Pending
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