JPH0443864Y2 - - Google Patents
Info
- Publication number
- JPH0443864Y2 JPH0443864Y2 JP1986123810U JP12381086U JPH0443864Y2 JP H0443864 Y2 JPH0443864 Y2 JP H0443864Y2 JP 1986123810 U JP1986123810 U JP 1986123810U JP 12381086 U JP12381086 U JP 12381086U JP H0443864 Y2 JPH0443864 Y2 JP H0443864Y2
- Authority
- JP
- Japan
- Prior art keywords
- illumination
- light
- back surface
- original
- reflection
- 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.)
- Expired
Links
- 238000005286 illumination Methods 0.000 claims description 17
- 239000003973 paint Substances 0.000 description 4
- 239000011521 glass Substances 0.000 description 2
- 238000003384 imaging method Methods 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 108091008695 photoreceptors Proteins 0.000 description 1
- 230000009978 visual deterioration Effects 0.000 description 1
Landscapes
- Surface Treatment Of Optical Elements (AREA)
- Exposure Or Original Feeding In Electrophotography (AREA)
- Optical Systems Of Projection Type Copiers (AREA)
- Light Sources And Details Of Projection-Printing Devices (AREA)
Description
【考案の詳細な説明】
〔考案の属する技術分野〕
本考案は照明装置、特に複写機における原稿照
明装置に関する。[Detailed description of the invention] [Technical field to which the invention pertains] The present invention relates to an illumination device, and particularly to a document illumination device in a copying machine.
従来この種の装置は第２図の様に構成されてい
た。１は原稿５を照明する為の照明ランプ、２，
３は原稿の照明効率を向上させる為、照明ランプ
に対向する面に特別な増反射処理を行なつた反射
板で通常アルミ等の金属でつくられ光源からの光
束を反射させ原稿に指向させる。４は原稿を載せ
る透明ガラス、６は原稿読み取り領域a0からの反
射光を結像系へ導くためのスリツトである。通常
２，３の反射板は前述の如く読み取り領域a0近傍
へ照明光を集光するべく設計されるが、多くの場
合、光束の一部はa0から離れた領域までをも照明
してしまう。
Conventionally, this type of device was constructed as shown in FIG. 1 is an illumination lamp for illuminating the original 5; 2;
Reference numeral 3 denotes a reflector plate whose surface facing the illumination lamp is subjected to a special reflective treatment in order to improve the illumination efficiency of the original.It is usually made of metal such as aluminum and reflects the light beam from the light source and directs it toward the original. 4 is a transparent glass on which a document is placed, and 6 is a slit for guiding reflected light from the document reading area a0 to an imaging system. Usually, two or three reflectors are designed to focus the illumination light near the reading area a 0 as described above, but in many cases, a portion of the light beam also illuminates areas far away from a 0 . Put it away.
同図a1がこの様な照明光束を受けた場合、これ
からの反射光は図で示す如く、反射板裏面にむけ
て散乱し、次にこの反射板裏面によつてさらに反
射されこれらが迷光となつて複写装置内部に拡が
り、結像レンズ、感光体に入射し画像の鮮鋭さを
鈍らす原因となつていた。 When a 1 in the same figure receives such an illumination light flux, the reflected light is scattered toward the back surface of the reflector, as shown in the figure, and is then further reflected by the back surface of the reflector, where it becomes stray light. The particles then spread inside the copying device and entered the imaging lens and photoreceptor, causing the image to become less sharp.
本考案の目的は前記反射板裏面反射による迷光
の発生を防止し、複写装置の画像の鮮鋭度を増す
照明装置を提供するものである。
An object of the present invention is to provide an illumination device that prevents the generation of stray light due to reflection from the back surface of the reflector plate and increases the sharpness of images in a copying device.
本考案は上記目的を達成するための照明ランプ
と照明ランプの光を原稿に集光する為の反射鏡を
備えた照明装置において反射鏡裏面に反射防止処
理をほどこすことを特徴とする照明装置でありま
す。
To achieve the above object, the present invention is an illumination device equipped with an illumination lamp and a reflection mirror for concentrating the light of the illumination lamp onto a document, and is characterized in that an anti-reflection treatment is applied to the back surface of the reflection mirror. It is.
第１図は本考案の実施例で１は照明光源、２，
３は反射板、４は原稿台ガラス、５は原稿、７は
反射板２の裏面に塗布された黒色塗料である。
FIG. 1 shows an embodiment of the present invention, in which 1 is an illumination light source, 2,
3 is a reflective plate, 4 is an original table glass, 5 is an original, and 7 is black paint applied to the back surface of the reflective plate 2.
照明光源１から照射された光束は反射板２，３
によつて大部分が原稿読み取り位置a0に集光する
が一部は従来例同様その周辺を照明する。しかし
ながら、これらのうち原稿面によつて拡散され反
射鏡２裏面に到達した光は黒塗料７によつて吸収
され、それ以後複写機内部に迷光となつて拡がる
ことがない。 The light beam irradiated from the illumination light source 1 passes through the reflectors 2 and 3.
Most of the light is focused on the document reading position a0 , but a portion illuminates the surrounding area as in the conventional example. However, the light that is diffused by the original surface and reaches the back surface of the reflecting mirror 2 is absorbed by the black paint 7 and does not spread as stray light inside the copying machine.
以上説明した様に照明系反射鏡裏面に反射防止
処理を施すことにより、これによる迷光の発生を
抑え、複写画像の鮮鋭度を向上させることができ
る。又塗料の塗布により反射鏡裏面のサビ等の視
覚的劣化を防ぐことができる。
As explained above, by applying anti-reflection treatment to the back surface of the illumination system reflecting mirror, it is possible to suppress the generation of stray light and improve the sharpness of the copied image. Moreover, visual deterioration such as rust on the back surface of the reflecting mirror can be prevented by applying the paint.
第１図は本考案の実施例を示す断面図、第２図
は従来例を示す断面図である。
図において、１はランプ、６はスリツト、７は
黒色塗料である。
FIG. 1 is a sectional view showing an embodiment of the present invention, and FIG. 2 is a sectional view showing a conventional example. In the figure, 1 is a lamp, 6 is a slit, and 7 is black paint.
Claims (1)
為の反射鏡を備えた照明装置において反射鏡裏面
に反射防止処理をほどこすことを特徴とする照明
装置。 1. An illumination device comprising an illumination lamp and a reflection mirror for focusing the light of the illumination lamp onto a document, characterized in that an anti-reflection treatment is applied to the back surface of the reflection mirror.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986123810U JPH0443864Y2 (en) | 1986-08-11 | 1986-08-11 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986123810U JPH0443864Y2 (en) | 1986-08-11 | 1986-08-11 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6329134U JPS6329134U (en) | 1988-02-25 |
| JPH0443864Y2 true JPH0443864Y2 (en) | 1992-10-16 |
Family
ID=31015255
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1986123810U Expired JPH0443864Y2 (en) | 1986-08-11 | 1986-08-11 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0443864Y2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5414746A (en) * | 1977-07-06 | 1979-02-03 | Canon Inc | Illuninating light source device |
-
1986
- 1986-08-11 JP JP1986123810U patent/JPH0443864Y2/ja not_active Expired
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5414746A (en) * | 1977-07-06 | 1979-02-03 | Canon Inc | Illuninating light source device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6329134U (en) | 1988-02-25 |
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