JP2001201639A - Light transmission body - Google Patents
Light transmission bodyInfo
- Publication number
- JP2001201639A JP2001201639A JP2000010677A JP2000010677A JP2001201639A JP 2001201639 A JP2001201639 A JP 2001201639A JP 2000010677 A JP2000010677 A JP 2000010677A JP 2000010677 A JP2000010677 A JP 2000010677A JP 2001201639 A JP2001201639 A JP 2001201639A
- Authority
- JP
- Japan
- Prior art keywords
- light
- light guide
- scattering pattern
- light scattering
- pattern
- 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
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は例えばファクシミ
リ、コピー機、ハンドスキャナ等に用いる導光体に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a light guide used for a facsimile, a copier, a hand scanner and the like.
【０００２】[0002]
【従来の技術】ファクシミリ、コピー機、ハンドスキャ
ナ等の機器には、原稿を読み取るための装置として、イ
メージセンサ等の画像読み取り装置が用いられている。
そして、画像読み取り装置のタイプとして、光路長が短
く、機器への組込みが容易な密着型イメージセンサが使
用されている。この密着型イメージセンサにあっては、
原稿の読み取るべき部分を照明装置によって読み取り可
能な照度以上に照明した状態で読み取るが、照明する範
囲は、主走査方向（長手方向）にはかなり長く、これと
直交する副走査方向には幅狭の帯状になっている。2. Description of the Related Art Devices such as facsimile machines, copiers and hand scanners use image reading devices such as image sensors as devices for reading originals.
As a type of the image reading device, a contact type image sensor which has a short optical path length and is easily incorporated into a device is used. In this contact type image sensor,
The portion to be read of the document is read in a state where the illuminance is higher than the illuminance that can be read by the illuminating device. It is shaped like a band.
【０００３】上記した細長い帯状の範囲を照明するため
に棒状或いは板状をなす導光体を用いたイメージセンサ
が、特開平８−１６３３２０号公報或いは特開平１０−
１２６５８１号公報に開示されている。[0003] An image sensor using a rod-shaped or plate-shaped light guide for illuminating the above-mentioned elongated strip-shaped area is disclosed in Japanese Patent Application Laid-Open No. 8-163320 or Japanese Patent Application Laid-Open No.
No. 126581.
【０００４】上記先行例に開示されるイメージセンサは
図８に示すように、ケース１００内に棒状導光体１０１
を装着している。この棒状導光体１０１はガラスや透明
樹脂にて構成され、長さ方向に直交する方向の断面形状
は基本形状が矩形で、一部にＣ面取りし、この面を出射
面１０２とし、更に棒状導光体１０１の長さ方向（紙面
垂直方向）の一端にＬＥＤ等の発光手段（図示せず）を
設け、この発光手段からの光を棒状導光体１０１の一端
から棒状導光体１０１内に導入し、棒状導光体１０１を
伝搬する照明光を棒状導光体の側面に形成した光散乱パ
ターン１０３にて散乱せしめ、この散乱した光を出射面
１０２から原稿台のカバーガラス１０４を通して読み込
み画像面に入射せしめ、その反射光をロッドレンズアレ
イ１０５を介して、光電変換素子１０６にて原稿を読み
取るようにしている。As shown in FIG. 8, the image sensor disclosed in the above-mentioned prior art has a rod-shaped light guide 101 in a case 100.
Is installed. The rod-shaped light guide 101 is made of glass or transparent resin, and has a rectangular cross section in a direction orthogonal to the length direction, a basic shape of a rectangle, a C-chamfered portion, and this surface is used as an emission surface 102. A light emitting means (not shown) such as an LED is provided at one end in the length direction (perpendicular to the paper surface) of the light guide 101, and light from this light emitting means is transmitted from one end of the rod light guide 101 to the inside of the rod light guide 101. And the illumination light propagating through the rod-shaped light guide 101 is scattered by a light scattering pattern 103 formed on the side surface of the rod-shaped light guide, and the scattered light is read from the emission surface 102 through the cover glass 104 of the document table. The light is made incident on the image surface, and the reflected light is read by the photoelectric conversion element 106 via the rod lens array 105 to read the original.
【０００５】[0005]
【発明が解決しようとする課題】ところで、上記光散乱
パターン１０３はシルクスクリーン印刷によって白色塗
料を導光体の表面に転写することで形成している。しか
しながらシルクスクリーン印刷による場合は、スクリー
ンの目詰り具合、温度、湿度、溶剤の希釈状態、更には
静電気による塗料の飛び散りなど多くのファクターによ
って転写ドットの大きさが変動してしまい、最適な光散
乱パターンを多数の導光体の表面に再現することができ
ず、生産歩留りが低下してしまう。また、シルクスクリ
ーン印刷による場合は、満足できる均一性が得られるま
で修正・製作を繰り返さなければならず、時間と費用が
かかってしまう。The light scattering pattern 103 is formed by transferring a white paint to the surface of the light guide by silk screen printing. However, in the case of silk screen printing, the size of the transferred dots fluctuates due to many factors such as the degree of clogging of the screen, the temperature, humidity, the dilution state of the solvent, and the scattering of paint due to static electricity, resulting in optimal light scattering. The pattern cannot be reproduced on the surface of many light guides, and the production yield is reduced. In the case of silk screen printing, correction and fabrication must be repeated until satisfactory uniformity is obtained, which requires time and money.
【０００６】[0006]
【課題を解決するための手段】上記課題を解決するため
第１発明に係る導光体は、レーザ光にて導光体の表面に
直接光散乱パターンを形成するようにした。導光体とし
てはアクリルやポリカーボネートなどの光透過性の高い
樹脂または光透過性の高い光学ガラスを用いる。In order to solve the above problems, the light guide according to the first aspect of the present invention is configured such that a light scattering pattern is formed directly on the surface of the light guide by laser light. As the light guide, a resin having high light transmission such as acrylic or polycarbonate or an optical glass having high light transmission is used.
【０００７】第１発明のように導光体表面に直接光散乱
パターンを形成する場合に、樹脂表面の加工等に一般的
に用いられている低出力（２０Ｗ程度）の連続波出力型
のレーザ光を用いたのでは、照射部分が半田ゴテで溶か
したような凹凸状になり、強度分布が均一な散乱光を得
られず、方向依存性が強い無秩序な反射光の集りになっ
てしまう。したがって、導光体表面に直接光散乱パター
ンを形成する場合には、パルス幅が１マイクロ秒以下の
尖塔値の高いレーザ光を用いることが好ましい。このよ
うなレーザ光を選定することで、光散乱パターン形成は
機械的に削られる態様を含む。When a light scattering pattern is formed directly on the surface of a light guide as in the first invention, a low output (about 20 W) continuous-wave output type laser generally used for processing a resin surface or the like. When light is used, the irradiated portion becomes uneven as if it was melted by a soldering iron, so that scattered light having a uniform intensity distribution cannot be obtained, and irregular reflected light having a strong direction dependence is obtained. Therefore, when a light scattering pattern is formed directly on the surface of the light guide, it is preferable to use laser light having a high spire value with a pulse width of 1 microsecond or less. By selecting such a laser beam, the light scattering pattern formation includes a mode in which the laser beam is mechanically cut.
【０００８】一方、第２発明に係る導光体は、入射面と
出射面を除く所定の面に薄膜を形成し、この薄膜にレー
ザ光にて光散乱パターンを形成した。このような構成と
することで、従来の低出力且つ連続波出力型のレーザ光
（パルス幅がマイクロ秒オーダ）あるいはパルス幅が１
μｓ（マイクロ秒）〜１ｍｓ（ミリ秒）のレーザ光を用
いて、白色塗料と同等以上のきめ細かな光散乱パターン
を、主に熱的に変質せしめて形成することができる。On the other hand, in the light guide according to the second aspect of the present invention, a thin film is formed on a predetermined surface excluding the incident surface and the emission surface, and a light scattering pattern is formed on the thin film by laser light. With such a configuration, a conventional low-output and continuous-wave output type laser beam (pulse width on the order of microseconds) or a pulse width of 1
Using a laser beam of μs (microsecond) to 1 ms (millisecond), a fine light scattering pattern equal to or more than that of a white paint can be formed by mainly thermally altering.
【０００９】前記薄膜を構成する材料としては、導光体
を構成する材料よりも透明度は低いがレーザ光にて細か
な光散乱パターンを描くことができる材料、例えばエポ
キシ樹脂、ホトレジスト、ＵＶ硬化樹脂、セロハンテー
プ等を挙げることができる。The material constituting the thin film is a material having a lower transparency than the material constituting the light guide but capable of forming a fine light scattering pattern with a laser beam, for example, an epoxy resin, a photoresist, a UV curable resin. And cellophane tape.
【００１０】[0010]
【発明の実施の形態】以下に本発明の実施の形態を添付
図面に基づいて説明する。ここで、図１は第１発明に係
る導光体を組み込んだ照明装置の斜視図、図２は同導光
体の一部の拡大斜視図であり、照明装置は導光体１を白
色のケース２内に出射面１ａが露出するように装填し、
また白色のケース２の一端にはＬＥＤなどからなる発光
源３を取り付けている。Embodiments of the present invention will be described below with reference to the accompanying drawings. Here, FIG. 1 is a perspective view of a lighting device incorporating the light guide according to the first invention, and FIG. 2 is an enlarged perspective view of a part of the light guide. It is loaded so that the emission surface 1a is exposed in the case 2,
A light emitting source 3 made of an LED or the like is attached to one end of the white case 2.
【００１１】導光体１はアクリルやポリカーボネートな
どの光透過性の高い樹脂または光透過性の高い光学ガラ
スから構成され、その断面の基本形状は矩形をなし、一
角部をＣ面取りし、この部分を出射面１ａとしている。
尚、導光体１の断面形状は矩形に限らず、一部を曲面と
してもよい。The light guide 1 is made of a resin having a high light transmittance such as acrylic or polycarbonate or an optical glass having a high light transmittance. The basic shape of the cross section is rectangular, and a corner is chamfered. Is the emission surface 1a.
In addition, the cross-sectional shape of the light guide 1 is not limited to a rectangle, and may be partly a curved surface.
【００１２】導光体１の側面には光散乱パターン４が形
成されている。この光散乱パターン４は発光源３を設け
た一端側から他端側に向かってその幅が徐々に拡大する
とともに、発光源３を設けた一端側から中間部にかけて
光散乱パターン４が不連続になっており、特に発光源３
に近接した部分には飛島状の光散乱パターン４ａを設け
３原色の発光源３に対応させている。A light scattering pattern 4 is formed on a side surface of the light guide 1. The width of the light scattering pattern 4 gradually increases from one end side where the light emitting source 3 is provided to the other end side, and the light scattering pattern 4 is discontinuous from one end side where the light emitting source 3 is provided to the middle part. Especially the light source 3
A light-scattering pattern 4a in the form of a flying island is provided in a portion adjacent to the light-emitting element 3 so as to correspond to the light-emitting sources 3 of three primary colors.
【００１３】上記光散乱パターン４は、パルス幅０．２
μｓ、繰り返し１ＫＨz、エネルギー１０〜３０ｍＪの
ＣＯ2レーザを直径２００μｍの面積部分に照射すると
いう条件にて形成した。The light scattering pattern 4 has a pulse width of 0.2
It was formed under the condition that a CO 2 laser having a repetition rate of 1 KHz and an energy of 10 to 30 mJ was applied to an area of 200 μm in diameter.
【００１４】図３は第２発明に係る導光体の斜視図であ
り、この導光体１の側面には薄膜５が形成され、この薄
膜５に光散乱パターン４が形成されている。薄膜５とし
ては導光体１を構成する材料よりも透明度は低いがレー
ザ光にて細かな光散乱パターンを描くことができる材
料、例えばエポキシ樹脂、ホトレジスト、ＵＶ硬化樹
脂、セロハンテープ等を用いる。FIG. 3 is a perspective view of a light guide according to the second invention. A thin film 5 is formed on a side surface of the light guide 1, and a light scattering pattern 4 is formed on the thin film 5. As the thin film 5, a material having a lower transparency than the material forming the light guide 1 but capable of drawing a fine light scattering pattern with a laser beam, for example, an epoxy resin, a photoresist, a UV curing resin, a cellophane tape, or the like is used.
【００１５】図３に示した光散乱パターン４について
は、例えば、繰り返し１０ｋＨzでパルス幅３０〜５０
μｓ（波長１０．６μｍ）の炭酸ガスレーザを用い、平
均光出力を数ワットとして加工することで得られる。The light scattering pattern 4 shown in FIG. 3 has a pulse width of 30 to 50 at a repetition rate of 10 kHz, for example.
It can be obtained by processing with a carbon dioxide laser of μs (wavelength 10.6 μm) and an average light output of several watts.
【００１６】図４（ａ）〜（ｅ）は光散乱パターン４の
一例を示したものであり、（ａ）に示すパターンは従来
のシルクスクリーン印刷によって形成するパターンと同
一のパターンであり、（ｂ）に示すパターンは微小ドッ
トを重ね合わせるようにしたパターンであり、（ｃ）に
示すパターンは１つのドットを楕円形状にしたパターン
であり、（ｄ）に示すパターンは連続するとともに発光
源を設けた一端側から他端側に向かってその幅が徐々に
拡大するパターンであり、（ｅ）に示すパターンは多数
の細幅光散乱部をその間隔が発光源から離れるにしたが
って徐々に短くなるように形成したパターンである。こ
のように、レーザ光を用いた場合には任意のパターンを
簡単に形成することができる。FIGS. 4A to 4E show an example of the light scattering pattern 4. The pattern shown in FIG. 4A is the same as the pattern formed by the conventional silk screen printing. The pattern shown in (b) is a pattern in which minute dots are superimposed, the pattern shown in (c) is a pattern in which one dot is formed into an elliptical shape, and the pattern shown in (d) is continuous and emits light. The width is gradually increased from one end side to the other end side, and the pattern shown in (e) gradually shortens a large number of narrow light scattering portions as the distance from the light emitting source increases. It is a pattern formed as follows. As described above, when a laser beam is used, an arbitrary pattern can be easily formed.
【００１７】また、レーザ光によって形成されるパター
ンは平面的なものに限定されない。例えば、図５に示す
ように楔状の凹部４ｂを光散乱パターン４として形成し
てもよい。The pattern formed by the laser beam is not limited to a planar pattern. For example, a wedge-shaped recess 4b may be formed as the light scattering pattern 4, as shown in FIG.
【００１８】図６は本発明に係る導光体にレーザ光で光
散乱パターンを形成する装置の斜視図であり、この装置
を用いて光散乱パターンを形成するには、先ずＸ方向に
移動可能なステージ６のリテーナ７に導光体１を光散乱
パターンを形成する面が上になるように４本セットす
る。FIG. 6 is a perspective view of an apparatus for forming a light scattering pattern on a light guide according to the present invention using a laser beam. In order to form a light scattering pattern using this apparatus, the apparatus is first movable in the X direction. The four light guides 1 are set on the retainer 7 of the stage 6 so that the surface on which the light scattering pattern is formed faces upward.
【００１９】レーザ発振器８からのレーザ光は出力変調
器９を介して出力制御されたパルス光となり、このパル
ス光はガルバノミラー１０によるθ偏向を受け、レンズ
１１にてＹ方向に変位し、導光体１の表面にドットパタ
ーンを形成する。The laser light from the laser oscillator 8 becomes pulse light whose output is controlled via the output modulator 9, this pulse light is subjected to θ deflection by the galvanometer mirror 10, displaced in the Y direction by the lens 11, and guided. A dot pattern is formed on the surface of the optical body 1.
【００２０】図１に示したような導光体１の表面に直接
光散乱パターン４をレーザ光にて機械的な研削を含んで
形成する場合には、パルス幅が極めて狭く尖塔値が高い
レーザ光を用いる必要があり、したがって、レーザ光と
してはＣＯ2レーザ、ＹＡＧレーザ、アルゴンレーザ、
エキシマレーザなどを使用する。When the light scattering pattern 4 is formed directly on the surface of the light guide 1 as shown in FIG. 1 by mechanical grinding using a laser beam, a laser having a very narrow pulse width and a high spire value is used. It is necessary to use light, and therefore, as laser light, CO 2 laser, YAG laser, argon laser,
An excimer laser or the like is used.
【００２１】一方、図３に示したように導光体１の表面
の薄膜５に光散乱パターン４をレーザ光にて変質させて
形成する場合には、使用レーザは樹脂によく吸収される
ものが望ましいため、ＣＯ2レーザが好ましい。On the other hand, as shown in FIG. 3, when the light scattering pattern 4 is formed on the thin film 5 on the surface of the light guide 1 by altering the light scattering pattern with a laser beam, the laser used is one that is well absorbed by the resin. Therefore, a CO 2 laser is preferable.
【００２２】図７は光散乱パターンを形成する装置の別
構成を示す斜視図であり、この装置はθ方向の偏向を行
うガルバノミラー１０ａと方向の偏向を行うガルバノミ
ラー１０ｂを設け、ワークエリア内のＸＹ方向の変位を
ガルバノミラー１０ａ，１０ｂによって行い、大きなＸ
方向の動きをステージ６によって行う。FIG. 7 is a perspective view showing another configuration of an apparatus for forming a light scattering pattern. This apparatus is provided with a galvano mirror 10a for deflecting in the θ direction and a galvano mirror 10b for deflecting in the direction. Is moved by the galvanomirrors 10a and 10b to obtain a large X
The movement in the direction is performed by the stage 6.
【００２３】[0023]
【発明の効果】以上に説明したように第１発明によれ
ば、レーザ光にて導光体の表面に直接光散乱パターンを
機械的な研削を含んで形成するようにしたので、強度分
布が均一な散乱光を生じ得る光散乱パターンとすること
ができる。According to the first aspect of the present invention, as described above, a light scattering pattern is formed directly on the surface of a light guide by laser light, including mechanical grinding. A light scattering pattern that can generate uniform scattered light can be obtained.
【００２４】また、第２発明によれば、導光体の入射面
と出射面を除く所定の面に薄膜を形成し、この薄膜にレ
ーザ光にて光散乱パターンを形成するようにしたので、
薄膜の材料を選定することで、低出力且つ連続波出力型
のレーザ光を用いても白色塗料と同等以上のきめ細かな
光散乱パターンを形成することができる。したがって、
設備投資の面で極めて有利である。According to the second aspect of the present invention, a thin film is formed on a predetermined surface excluding the incident surface and the outgoing surface of the light guide, and a light scattering pattern is formed on the thin film by laser light.
By selecting a material for the thin film, a fine light scattering pattern equal to or greater than that of a white paint can be formed even when a low-output and continuous-wave output laser beam is used. Therefore,
This is extremely advantageous in terms of capital investment.
【００２５】また、第１，第２いずれの発明も、レーザ
光にて光散乱パターンを形成するので、スクリーン印刷
によって光散乱パターンを形成する場合と比較して、温
度、湿度、溶剤の希釈状態などの多くの要因に影響され
ることがなく品質が安定する。In each of the first and second inventions, since the light scattering pattern is formed by the laser beam, the temperature, humidity, and the dilution state of the solvent are lower than when the light scattering pattern is formed by screen printing. Quality is stable without being affected by many factors such as.
【００２６】また、スクリーン印刷に比べて、レーザ光
にて形成する場合には出力やパターンをコンピュータ制
御できるので、試作や微調整を短時間のうちに行うこと
ができる。Further, compared with screen printing, when forming by laser light, the output and the pattern can be controlled by computer, so that trial production and fine adjustment can be performed in a short time.
【００２７】また、スクリーン印刷に比べて、レーザ光
の場合には加工速度が極めて速い。具体的には、１２Ｗ
（ワット）連続発振型レーザマーカ（ＭＬ−９１００
キーエンス社）を用いると、２．０×０．５ｍｍのドッ
トを４ｍｍ間隔で１０個描画するのに５秒程度しかかか
らない。Further, compared with screen printing, the processing speed is extremely high in the case of laser light. Specifically, 12W
(Watt) continuous wave laser marker (ML-9100
With Keyence, it takes only about 5 seconds to draw 10 dots of 2.0 × 0.5 mm at 4 mm intervals.
【００２８】更に、レーザ光を用いることで従来のスク
リーン印刷では転写できなかった小さなサイズの光り散
乱パターンを形成することができ、散乱光の反射がより
均一になる。Further, by using a laser beam, a light scattering pattern having a small size, which cannot be transferred by conventional screen printing, can be formed, and the reflection of the scattered light becomes more uniform.
【図１】請求項１に記載した発明に係る導光体を組み込
んだ照明装置の斜視図FIG. 1 is a perspective view of a lighting device incorporating a light guide according to the invention described in claim 1;
【図２】請求項１に記載した発明に係る導光体の一部の
拡大斜視図FIG. 2 is an enlarged perspective view of a part of the light guide according to the invention described in claim 1;
【図３】請求項２に記載した発明に係る導光体の一部の
拡大斜視図FIG. 3 is an enlarged perspective view of a part of the light guide according to the invention described in claim 2;
【図４】各種光散乱パターンを示す図FIG. 4 shows various light scattering patterns.
【図５】光散乱パターンを凹部とした例を示す斜視図FIG. 5 is a perspective view showing an example in which a light scattering pattern is a concave portion.
【図６】本発明に係る導光体にレーザ光で光散乱パター
ンを形成する装置の斜視図FIG. 6 is a perspective view of an apparatus for forming a light scattering pattern with a laser beam on a light guide according to the present invention.
【図７】光散乱パターンを形成する装置の別構成を示す
斜視図FIG. 7 is a perspective view showing another configuration of an apparatus for forming a light scattering pattern.
【図８】従来の画像読取装置の断面図FIG. 8 is a sectional view of a conventional image reading apparatus.
１…導光体、１ａ…出射光、２…ケース、３…発光源、
４，４ａ，４ｂ…光散乱パターン、５…薄膜、６…ステ
ージ、７…リテーナ、８…レーザ発振器、９…出力変調
器、１０，１０ａ，１０ｂ…ガルバノミラー、１１…レ
ンズ。DESCRIPTION OF SYMBOLS 1 ... Light guide, 1a ... Outgoing light, 2 ... Case, 3 ... Light emission source,
4, 4a, 4b: light scattering pattern, 5: thin film, 6: stage, 7: retainer, 8: laser oscillator, 9: output modulator, 10, 10a, 10b: galvano mirror, 11: lens.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） // Ｆ２１Ｖ 8/00 ６０１ Ｆ２１Ｖ 8/00 ６０１Ｚ Ｇ０６Ｆ 15/64 ３２０Ｆ Ｆターム(参考） 2H038 AA54 BA01 2H042 BA04 BA15 BA20 5B047 AA01 BA10 BC12 BC30 5C051 AA01 BA04 DB21 DB29 DC04 DC07 FA01 5C072 AA01 BA13 CA05 CA09 DA25 DA30 XA01 ──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 7 Identification symbol FI Theme coat ゛ (reference) // F21V 8/00 601 F21V 8/00 601Z G06F 15/64 320F F-term (reference) 2H038 AA54 BA01 2H042 BA04 BA15 BA20 5B047 AA01 BA10 BC12 BC30 5C051 AA01 BA04 DB21 DB29 DC04 DC07 FA01 5C072 AA01 BA13 CA05 CA09 DA25 DA30 XA01
Claims (5)
せながら出射面から出射せしめるようにした導光体にお
いて、この導光体の入射面と出射面を除く所定の面には
入射した照射光を散乱する光散乱パターンが、レーザ光
を照射することで形成されていることを特徴とする導光
体。1. A light guide in which irradiation light incident from an end surface is emitted from an emission surface while being reflected on an inner surface, and irradiation incident on a predetermined surface excluding the incidence surface and the emission surface of the light guide. A light guide, wherein a light scattering pattern for scattering light is formed by irradiating a laser beam.
光散乱パターンは機械的に削られる態様を含んでいるこ
とを特徴とする導光体。2. The light guide according to claim 1, wherein the light scattering pattern includes a mode in which the light scattering pattern is mechanically cut.
せながら出射面から出射せしめるようにした導光体にお
いて、この導光体の入射面と出射面を除く所定の面には
薄膜が形成され、この薄膜にレーザ光にて光散乱パター
ンが形成されていることを特徴とする導光体。3. A light guide in which irradiation light incident from an end surface is emitted from an emission surface while being reflected by an inner surface, and a thin film is formed on a predetermined surface of the light guide except an incidence surface and an emission surface. A light scattering pattern formed by laser light on the thin film.
導光体はアクリルやポリカーボネートなどの光透過性の
高い樹脂または光透過性の高い光学ガラスから構成さ
れ、前記薄膜は導光体を構成する材料よりも透明度は低
いがレーザ光にて細かな光散乱パターンを描くことがで
きる材料からなることを特徴とする導光体。4. The light guide according to claim 3, wherein the light guide is made of a resin having a high light transmittance such as acrylic or polycarbonate or an optical glass having a high light transmittance, and the thin film is formed of the light guide. A light guide characterized in that the light guide is made of a material having a lower transparency than a material constituting the material, but capable of drawing a fine light scattering pattern with a laser beam.
光散乱パターンは主に熱的に変質されることで形成され
ていることを特徴とする導光体。5. The light guide according to claim 3, wherein the light scattering pattern is formed mainly by thermal transformation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000010677A JP2001201639A (en) | 2000-01-19 | 2000-01-19 | Light transmission body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000010677A JP2001201639A (en) | 2000-01-19 | 2000-01-19 | Light transmission body |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2001201639A true JP2001201639A (en) | 2001-07-27 |
Family
ID=18538666
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000010677A Pending JP2001201639A (en) | 2000-01-19 | 2000-01-19 | Light transmission body |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2001201639A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7088905B1 (en) | 2004-05-26 | 2006-08-08 | Nippon Sheet Glass Co., Ltd. | Light guide, line-illuminating device, and image-scanning device |
| WO2006120932A1 (en) * | 2005-05-12 | 2006-11-16 | Nippon Sheet Glass Company, Limited | Light guide and image reader |
| JP2007087638A (en) * | 2005-09-20 | 2007-04-05 | Tsuchiya Co Ltd | Light guide plate and method of manufacturing same |
-
2000
- 2000-01-19 JP JP2000010677A patent/JP2001201639A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7088905B1 (en) | 2004-05-26 | 2006-08-08 | Nippon Sheet Glass Co., Ltd. | Light guide, line-illuminating device, and image-scanning device |
| WO2006120932A1 (en) * | 2005-05-12 | 2006-11-16 | Nippon Sheet Glass Company, Limited | Light guide and image reader |
| US7812304B2 (en) | 2005-05-12 | 2010-10-12 | Nippon Sheet Glass Company, Limited | Light guide having light scattering patterns with different light reflected directions |
| JP2007087638A (en) * | 2005-09-20 | 2007-04-05 | Tsuchiya Co Ltd | Light guide plate and method of manufacturing same |
| JP4634264B2 (en) * | 2005-09-20 | 2011-02-16 | 株式会社槌屋 | Light guide plate and manufacturing method thereof |
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