JPS61145928U - - Google Patents
Info
- Publication number
- JPS61145928U JPS61145928U JP2951185U JP2951185U JPS61145928U JP S61145928 U JPS61145928 U JP S61145928U JP 2951185 U JP2951185 U JP 2951185U JP 2951185 U JP2951185 U JP 2951185U JP S61145928 U JPS61145928 U JP S61145928U
- Authority
- JP
- Japan
- Prior art keywords
- strip
- scanning area
- document
- fresnel lens
- shaped
- 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 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
Landscapes
- Light Sources And Details Of Projection-Printing Devices (AREA)
- Facsimile Scanning Arrangements (AREA)
- Exposure Or Original Feeding In Electrophotography (AREA)
- Optical Systems Of Projection Type Copiers (AREA)
Description
第１図は本考案の一実施例を示すもので、第１
図イは全体の説明図、第１図ロはフレネルレンズ
の平面図、第１図ハは第１図ロの縦側面図、第１
図ニは第１図ロの横側面図。第２図はフレネルレ
ンズによる光量分布・集光効果を示すもので、第
２図イは原稿の帯状の走査領域の長手方向におけ
る光量分布の均一化を示す説明図、第２図ロは前
記領域の幅方向における集光効果を示す説明図。
第３図は従来の原稿照明装置を示すもので、第３
図イは全体の説明図、第３図ロはフレネルレンズ
の平面図、第３図ハは第３図ロの縦断面図。
符号の説明、１……プラテンガラス、２……螢
光ランプ、３……フレネルレンズ、３ａ……輪帯
レンズのパターン、３ｂ……棒状レンズのパター
ン、４……原稿の反射光、４ａ……照射光、５…
…反射ミラー、６……光学レンズ、７……イメー
ジセンサ。
Figure 1 shows one embodiment of the present invention.
Figure A is an overall explanatory diagram, Figure 1B is a plan view of the Fresnel lens, Figure 1C is a vertical side view of Figure 1B,
Figure D is a side view of Figure 1B. Figure 2 shows the light intensity distribution and light condensing effect of the Fresnel lens. Figure 2A is an explanatory diagram showing the uniformity of the light intensity distribution in the longitudinal direction of the belt-shaped scanning area of the document, and Figure 2B is an illustration of the area. FIG.
Figure 3 shows a conventional document illumination device.
Figure A is an explanatory view of the whole, Figure 3B is a plan view of the Fresnel lens, and Figure 3C is a longitudinal sectional view of Figure 3B. Explanation of symbols, 1... platen glass, 2... fluorescent lamp, 3... Fresnel lens, 3a... annular lens pattern, 3b... bar-shaped lens pattern, 4... reflected light from original, 4a... ...Irradiation light, 5...
... Reflection mirror, 6... Optical lens, 7... Image sensor.
Claims (1)
帯状の原稿走査領域を照射する原稿照明装置にお
いて、 前記帯状のフレネルレンズは、前記原稿走査領
域の長手方向の光量分布を均一にする輪帯レンズ
のパターンと、前記原稿走査領域の幅方向の集光
率を大にする棒状レンズのパターンを有すること
を特徴とする原稿照明装置。[Claims for Utility Model Registration] In a document illumination device that illuminates a strip-shaped document scanning area from a linear light source via a strip-shaped Fresnel lens, the strip-shaped Fresnel lens is configured to control light intensity distribution in the longitudinal direction of the document scanning area. What is claimed is: 1. A document illumination device comprising: a pattern of annular lenses that make the image uniform; and a pattern of rod-like lenses that increases the light condensing rate in the width direction of the document scanning area.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2951185U JPS61145928U (en) | 1985-03-01 | 1985-03-01 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2951185U JPS61145928U (en) | 1985-03-01 | 1985-03-01 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61145928U true JPS61145928U (en) | 1986-09-09 |
Family
ID=30528387
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2951185U Pending JPS61145928U (en) | 1985-03-01 | 1985-03-01 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61145928U (en) |
-
1985
- 1985-03-01 JP JP2951185U patent/JPS61145928U/ja active Pending