JPH0637380Y2 - Linear light source for reading - Google Patents
Linear light source for readingInfo
- Publication number
- JPH0637380Y2 JPH0637380Y2 JP1987170429U JP17042987U JPH0637380Y2 JP H0637380 Y2 JPH0637380 Y2 JP H0637380Y2 JP 1987170429 U JP1987170429 U JP 1987170429U JP 17042987 U JP17042987 U JP 17042987U JP H0637380 Y2 JPH0637380 Y2 JP H0637380Y2
- Authority
- JP
- Japan
- Prior art keywords
- resin substrate
- light emitting
- light source
- reading
- linear light
- 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 - Lifetime
Links
- 239000000758 substrate Substances 0.000 claims description 37
- 229920005989 resin Polymers 0.000 claims description 29
- 239000011347 resin Substances 0.000 claims description 29
- 239000002184 metal Substances 0.000 claims description 3
- 238000009826 distribution Methods 0.000 description 4
- 230000001788 irregular Effects 0.000 description 4
- 230000004907 flux Effects 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000003822 epoxy resin Substances 0.000 description 2
- 238000005286 illumination Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 239000011162 core material Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 235000012438 extruded product Nutrition 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Light Sources And Details Of Projection-Printing Devices (AREA)
- Facsimile Scanning Arrangements (AREA)
Description
【考案の詳細な説明】 イ）産業上の利用分野 本考案は小型化に適し光学特性の優れた読取用線状光源
に関する。DETAILED DESCRIPTION OF THE INVENTION a) Field of Industrial Application The present invention relates to a linear light source for reading, which is suitable for miniaturization and has excellent optical characteristics.
ロ）従来の技術 近年、特開昭60−230627号公報や特開昭60−230628号公
報に示されるような発光ダイオードを用いた読取用線状
光源が利用されるようになった。この様な読取用線状光
源は、第２図（ｃ）（ｄ）に示すように長尺の基板（6
1）の上に発光ダイオード（62）（62）…を整列配置
し、その上に棒状レンズ（63）を配置しているが、発光
ダイオード（62）（62）…の光量及び棒状レンズ（63）
の焦点ならびに被写界深度の浅さから、照明位置（同図
（ｂ）の輝度分布に於ける（イ）の部分）や受光素子
（図示せず）は光源の近くに配置されている。(B) Conventional technology In recent years, a linear reading light source using a light emitting diode as disclosed in JP-A-60-230627 and JP-A-60-230628 has come into use. Such a linear light source for reading has a long substrate (6) as shown in FIGS. 2 (c) and (d).
1) The light emitting diodes (62) (62) are arranged in line, and the rod-shaped lens (63) is placed on the light-emitting diodes (62) (62). )
Due to the focal point and the shallow depth of field, the illumination position (portion (a) in the luminance distribution of FIG. 9B) and the light receiving element (not shown) are arranged near the light source.
そして、第２図（ａ）に示す様な受光素子の受光領域に
おける照度分布図において、一点鎖線で囲まれた部分
（ロ）は有効照射面すなわち受光領域である。この面内
で充分の照度が得られる様に、実線（ハ）で囲まれた右
上がり斜線部分（ニ）を実際の照明領域としている。Then, in the illuminance distribution chart in the light receiving area of the light receiving element as shown in FIG. 2A, the portion (b) surrounded by the one-dot chain line is the effective irradiation surface, that is, the light receiving area. In order to obtain a sufficient illuminance in this plane, the diagonally rising portion (d) surrounded by the solid line (c) is the actual illumination area.
ところが従来の読取装置に於て、白色原稿に対し受光素
子が得る反射光は、しばしば樹脂基板の長辺方向の一辺
に於て、不規則な像の境界線（ホ）を有する照射面（図
に於て左上がり斜線部分（ヘ））となり、有効照射面
（ロ）より狭くなる。However, in the conventional reading device, the reflected light obtained by the light receiving element with respect to the white original is often the irradiation surface having an irregular image boundary line (e) on one side in the long side direction of the resin substrate (see FIG. In this case, the diagonally rising part (f) rises to the left and becomes narrower than the effective irradiation surface (b).
この原因を調べたところ、基板（61）の長手方向側辺が
原稿面に近い時、不規則な「像の境界線（ホ）」となっ
ていることが判った。この様な基板（61）は、専ら配線
の便利さや取扱の容易さからガラスエポキシ樹脂を母材
とするような平板状の樹脂基板を用いているが、樹脂基
板は切断加工時に端縁に微細な凹凸が生じたり、ガラス
繊維等の芯材が突出したり切削等の粒が付着する。この
様な端縁が原稿面から反射された反射光束中に位置する
と、それが有効光束中でなくとも端縁で乱反射を生じ、
その乱反射が有効光束に影響を与え、受光領域への不規
則な食い込み（像の境界線（ホ）が有効照射面（ロ）内
に出来る事）が生ずる。When the cause of this was investigated, it was found that when the side of the substrate (61) in the longitudinal direction was close to the document surface, an irregular “image boundary line (e)” was formed. For such a substrate (61), a flat resin substrate having a glass epoxy resin as a base material is used for convenience of wiring and easy handling. However, the resin substrate has fine edges at the time of cutting. Unevenness is generated, the core material such as glass fiber is projected, and grains such as cutting are attached. If such an edge is located in the reflected light beam reflected from the document surface, irregular reflection occurs at the edge even if it is not in the effective light beam,
The diffused reflection affects the effective light flux, and an irregular bite into the light receiving area (the boundary line (e) of the image can be formed within the effective irradiation surface (b)) occurs.
更に発光ダイオードの点灯による発熱で基板（61）が変
形し易く、基板（61）の長手方向側辺も熱膨張し、反射
光束中に更に突出されるので、像の境界線（ホ）の食い
込みが更に大きくなる、第１の欠点がある。そして上述
の基板（61）の熱変形により発光ダイオード（62）も基
板（61）の横方向に位置ずれするので、原稿面での反射
位置がずれ、反射光は所定の受光領域から位置ずれす
る、という第２の欠点がある。Further, the substrate (61) is easily deformed by the heat generated by the lighting of the light emitting diode, and the side of the substrate (61) in the longitudinal direction also thermally expands and is further projected into the reflected light flux, so that the boundary line (e) of the image bites. Is further increased, there is a first drawback. Since the light emitting diode (62) is also displaced in the lateral direction of the substrate (61) due to the thermal deformation of the substrate (61), the reflection position on the document surface is displaced, and the reflected light is displaced from a predetermined light receiving area. There is a second drawback that is.
ハ）考案が解決しようとする問題点 本考案は上述の点を考慮してなされたもので、発光ダイ
オードの読取用線状光源と受光素子とを充分近接させて
読取装置を小型にする場合でも所定の有効照射面に対す
る光学特性が得られる読取用線状光源を提供するもので
ある。C) Problems to be solved by the present invention The present invention has been made in consideration of the above-mentioned points, and even when the reading linear light source of the light emitting diode and the light receiving element are sufficiently close to each other, the reading apparatus can be made compact. It is intended to provide a reading linear light source that can obtain optical characteristics for a predetermined effective irradiation surface.
ニ）問題点を解決するための手段 本考案は上述した樹脂基板の長手方向の１側辺に近接し
た突出部を端縁に有した金属の支持体を樹脂基板の裏面
に設けたものである。D) Means for Solving the Problems The present invention is to provide a metal supporter having, on the edge thereof, a protruding portion close to one side of the resin substrate in the longitudinal direction on the back surface of the resin substrate. .
ホ）作用 これにより、発光ダイオードの点灯による発熱で樹脂基
板が変形しようとしても、樹脂基板の長手方向の１側辺
が突出部に当接するので、１側辺が原稿面からの反射光
束中に更に突出しない。故に受光領域への像の境界線へ
の食い込みがなくなるので、有効照射面を全部覆う事が
出来る。更に、樹脂基板が熱変形しようとしても、１側
辺は突出部に当接するので、樹脂基板上の発光ダイオー
ドの移動量が少ない。故に、原稿面からの反射光は受光
領域の位置に正確に入射される。(E) Action As a result, even if the resin substrate is deformed due to heat generated by lighting of the light emitting diode, one side in the longitudinal direction of the resin substrate comes into contact with the protrusion, so that one side is included in the light flux reflected from the document surface. Does not protrude further. Therefore, there is no bite in the boundary line of the image in the light receiving region, and the entire effective irradiation surface can be covered. Further, even if the resin substrate is about to be thermally deformed, one side is in contact with the protruding portion, so that the amount of movement of the light emitting diode on the resin substrate is small. Therefore, the reflected light from the document surface is accurately incident on the position of the light receiving area.
ヘ）実施例 第１図は本考案実施例の読取用線状光源（１）を用いた
読取装置の断面図である。図において（11）は長尺の樹
脂基板で、例えば厚さ0.6〜0.9mm巾10〜20mm長さ150〜4
50mmの表面に導電パターンを有したガラスエポキシ樹脂
基板からなる。（12）は樹脂基板（11）上に固着されワ
イヤボンド法で配線が施こされた発光ダイオードで、第
２図の如く複数個が１列に整列して設けられている。
（13）は発光ダイオード（12）の上方に設けられた棒状
レンズで直径３〜6mmの円柱又は楕円柱状のガラス棒等
からなる。そしてこの棒状レンズ（13）は前述の如く発
光ダイオード（12）の列と稜線方向とが一致するように
配置され、発光ダイオード毎の仕切り壁（141）を有し
て樹脂基板（11）に突出ピン（142）（142）の溶着で固
定された枠体（14）の端部に設けた固定枠（143）によ
り固定されている。F) Embodiment FIG. 1 is a sectional view of a reading device using the reading linear light source (1) of the embodiment of the present invention. In the figure, (11) is a long resin substrate, for example, a thickness of 0.6 to 0.9 mm, a width of 10 to 20 mm, and a length of 150 to 4
It consists of a glass epoxy resin substrate with a conductive pattern on the surface of 50 mm. Reference numeral (12) is a light emitting diode which is fixed on the resin substrate (11) and provided with wiring by a wire bonding method, and a plurality of light emitting diodes are arranged in a line as shown in FIG.
Reference numeral (13) is a rod-shaped lens provided above the light emitting diode (12), and is composed of a cylindrical or elliptic glass rod having a diameter of 3 to 6 mm. As described above, the rod-shaped lens (13) is arranged so that the row of the light emitting diodes (12) and the direction of the ridge line coincide with each other, and has a partition wall (141) for each light emitting diode and projects onto the resin substrate (11). It is fixed by a fixing frame (143) provided at the end of the frame body (14) fixed by welding the pins (142) (142).
（15）は樹脂基板（11）の裏面に、ビス止めとかグリス
による貼着等により固着された支持体で、厚みが1.5〜
4.0mm巾10〜25mm長さ150〜450mmのアルミニウム押出成
型品等の金属からなり、端縁には樹脂基板（11）の長手
方向の１側辺（111）を覆う、高さ1.0〜3.0mmの土手状
の突出部（151）を有し、表面には突出ピン（142）（14
2）の逃し用レール（152）（152）を有している。この
様に突出部（151）は、その内側面が樹脂基板（11）の
表面に略直交し、かつ樹脂基板（11）の長手方向の１側
辺にほとんど接触する程近接し（例えば0.1mm程度のす
きまが有る様に）、かつ１側辺に略平行に位置する様
に、支持体（15）の端縁上に設けられている。(15) is a support fixed to the back surface of the resin substrate (11) by screwing or pasting with grease, and has a thickness of 1.5 ~.
4.0mm width 10 ~ 25mm length 150 ~ 450mm made of metal such as extruded product, the edge covers one side (111) in the longitudinal direction of the resin substrate (11), height 1.0 ~ 3.0mm It has a bank-shaped protrusion (151) of which the protrusion pins (142) (14
It has the escape rails (152) (152) of 2). In this way, the inner surface of the protrusion (151) is substantially orthogonal to the surface of the resin substrate (11), and is so close as to almost contact one side of the resin substrate (11) in the longitudinal direction (for example, 0.1 mm). Is provided on the edge of the support (15) so as to be positioned substantially parallel to one side.
また（153）は線状光源の支持・角度調整を行うタツプ
穴、（16）は発光ダイオード電流制限用抵抗である。こ
の様な線状光源（１）は５〜15mm離れた位置に原稿面
（２）を設け、短焦点レンズアレイ（３）、受光素子ア
レイ（４）等と共に固定具（５）に支持・固定されてい
る。Further, (153) is a tap hole for supporting and adjusting the angle of the linear light source, and (16) is a light emitting diode current limiting resistor. Such a linear light source (1) is provided with a document surface (2) at a position separated by 5 to 15 mm, and is supported / fixed to a fixture (5) together with a short focus lens array (3), a light receiving element array (4) and the like. Has been done.
ト）考案の効果 本考案は上述の様に、内側面が平板状の樹脂基板の表面
に略直交しかつ樹脂基板の長手方向の１側辺に殆ど接触
する程近接し略平行に位置する様に、支持体の端縁上に
突出部を設ける。これにより、発光ダイオードの点灯に
よる発熱で樹脂基板が変形しようとしても樹脂基板の長
手方向の１側辺が突出部の内側面に当接するので、熱膨
張により１側辺が原稿面からの反射束中に更に突出しな
い。また１側辺を突出部で覆っている。故に上記２つの
理由により、原稿面からの反射光束に置かれた１側辺か
らの乱反射による受光領域への食い込み（像の境界線が
有効照射面の領域内に生ずること）がなくなり、有効照
射面を全部覆う様に照射できる。G) Effect of the Invention As described above, according to the present invention, the inner surface is positioned substantially parallel to the surface of the flat plate-shaped resin substrate and close to almost one side of the resin substrate in the longitudinal direction so as to be positioned substantially parallel to each other. A protrusion is provided on the edge of the support. As a result, even if the resin substrate is deformed by the heat generated by the lighting of the light emitting diode, one side of the resin substrate in the longitudinal direction abuts the inner side surface of the projecting portion, so that one side is reflected from the original surface by thermal expansion. It doesn't stick out further. Also, one side is covered with a protrusion. Therefore, due to the above two reasons, there is no bite into the light receiving area (the boundary line of the image occurs in the area of the effective irradiation surface) due to diffused reflection from one side placed on the reflected light beam from the document surface, and the effective irradiation is eliminated. It can be irradiated to cover the entire surface.
また、上述の様に樹脂基板が熱変形しようとしても、１
側辺が内側面に当接しているので、樹脂基板上の発光ダ
イオードの横方向の移動量が少ない。故に発光ダイオー
ドから発射され原稿面から反射された光は所定の受光領
域の位置に正確に入射する事が出来る。また、平板状の
樹脂基板を用いるので、形状が簡単だから製造し易くコ
ストも安い。In addition, even if the resin substrate is thermally deformed as described above,
Since the side edge is in contact with the inner side surface, the lateral movement amount of the light emitting diode on the resin substrate is small. Therefore, the light emitted from the light emitting diode and reflected from the document surface can accurately enter the position of the predetermined light receiving region. Further, since a flat resin substrate is used, the shape is simple, so that it is easy to manufacture and the cost is low.
【図面の簡単な説明】 第１図は本考案実施例の読取用線状光源を用いた読取装
置の断面図、第２図は斯種線上光源の照度分布図（ａ）
輝度分布図（ｂ）および断面図（ｃ）（ｄ）である。 （１）……線状光源、（11）……樹脂基板、（12）……
発光ダイオード、（13）……棒状レンズ、（14）……枠
体、（15）……支持体。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a sectional view of a reading device using a reading linear light source according to an embodiment of the present invention, and FIG. 2 is an illuminance distribution diagram (a) of such a linear light source.
It is a luminance distribution diagram (b) and sectional views (c) and (d). (1) …… Linear light source, (11) …… Resin substrate, (12) ……
Light-emitting diode, (13) …… rod lens, (14) …… frame, (15) …… support.
Claims (1)
整列固着された複数の発光ダイオードと、発光ダイオー
ドの上方にその稜線が発光ダイオードの列と略一致する
様に設けられた棒状レンズと、樹脂基板の裏面に設けら
れ突出部を有する金属の支持体とを備え、その内側面が
樹脂基板の表面に略直交しかつ樹脂基板の長手方向の１
側辺に殆ど接触する程近接し略平行に位置する様に、突
出部は支持体の端縁上に設けられた事を特徴とする読取
用線状光源。1. A long flat resin substrate, a plurality of light emitting diodes aligned and fixed on the resin substrate, and provided above the light emitting diodes so that their ridge lines substantially coincide with the rows of the light emitting diodes. It is provided with a rod-shaped lens and a metal support body provided on the back surface of the resin substrate and having a protruding portion, the inner side surface of which is substantially orthogonal to the surface of the resin substrate and which extends in the longitudinal direction of the resin substrate.
A linear light source for reading, characterized in that the projecting portion is provided on the edge of the support so that the projecting portion is located so as to be close to and almost parallel to the side edge so as to come into contact with the side edge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987170429U JPH0637380Y2 (en) | 1987-11-06 | 1987-11-06 | Linear light source for reading |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987170429U JPH0637380Y2 (en) | 1987-11-06 | 1987-11-06 | Linear light source for reading |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0175215U JPH0175215U (en) | 1989-05-22 |
| JPH0637380Y2 true JPH0637380Y2 (en) | 1994-09-28 |
Family
ID=31461363
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987170429U Expired - Lifetime JPH0637380Y2 (en) | 1987-11-06 | 1987-11-06 | Linear light source for reading |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0637380Y2 (en) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61107212A (en) * | 1984-10-30 | 1986-05-26 | Canon Inc | lighting equipment |
| JPH0514597Y2 (en) * | 1986-01-30 | 1993-04-19 |
-
1987
- 1987-11-06 JP JP1987170429U patent/JPH0637380Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0175215U (en) | 1989-05-22 |
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