JP2000114603A - Light emitting device and image reading device using the same - Google Patents
Light emitting device and image reading device using the sameInfo
- Publication number
- JP2000114603A JP2000114603A JP10292963A JP29296398A JP2000114603A JP 2000114603 A JP2000114603 A JP 2000114603A JP 10292963 A JP10292963 A JP 10292963A JP 29296398 A JP29296398 A JP 29296398A JP 2000114603 A JP2000114603 A JP 2000114603A
- Authority
- JP
- Japan
- Prior art keywords
- light
- light emitting
- light source
- emitting device
- optical function
- 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
- 230000003287 optical effect Effects 0.000 claims abstract description 72
- 238000005286 illumination Methods 0.000 abstract description 19
- 230000004907 flux Effects 0.000 abstract description 9
- 238000010586 diagram Methods 0.000 description 10
- 238000003384 imaging method Methods 0.000 description 9
- 239000000463 material Substances 0.000 description 5
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 210000001747 pupil Anatomy 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- 238000001465 metallisation Methods 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L33/48—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
- H01L33/58—Optical field-shaping elements
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L25/00—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof
- H01L25/03—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes
- H01L25/04—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes the devices not having separate containers
- H01L25/075—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes the devices not having separate containers the devices being of a type provided for in group H01L33/00
- H01L25/0753—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes the devices not having separate containers the devices being of a type provided for in group H01L33/00 the devices being arranged next to each other
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/0001—Technical content checked by a classifier
- H01L2924/0002—Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00
Landscapes
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Manufacturing & Machinery (AREA)
- Computer Hardware Design (AREA)
- Power Engineering (AREA)
- Led Device Packages (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は発光デバイス及びそ
れを用いた画像読取装置に関し、特に簡易な構成より成
る発光デバイスから照明効率の高い、明るい照明光を得
ると共に、該発光デバイスから発光された光束を利用し
てフィルム等の原稿の画像情報を効率良く照明し、該原
稿の画像情報をラインセンサー等の読取手段で高精度に
読取るようにしたものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a light emitting device and an image reading apparatus using the same, and more particularly to obtaining a bright illumination light with high illumination efficiency from a light emitting device having a simple structure and emitting light from the light emitting device. The image information of a document such as a film is efficiently illuminated using a light beam, and the image information of the document is read with high accuracy by reading means such as a line sensor.
【０００２】[0002]
【従来の技術】従来よりフィルムスキャナー等の画像読
取装置に用いられる発光デバイス（照明光源）としては
ハロゲン電球等の点状光源や蛍光灯等の線状光源等が用
いられてきた。線状光源の場合はそれ自身が拡散光であ
ったり、また輝度が高いという特徴を持っており、十分
な光量で原稿（フィルム）等を照明することができる。
一方点状光源を用いたときはコンデンサーレンズ等を用
いて該点状光源から周囲に放射される光束を集光して平
行光束としたり、あるいは集光光束としたりして原稿
（フィルム）を照明し、その照明効率を向上させてい
る。2. Description of the Related Art Conventionally, point light sources such as halogen bulbs and linear light sources such as fluorescent lamps have been used as light emitting devices (illumination light sources) used in image reading apparatuses such as film scanners. In the case of a linear light source, the light source itself is a diffused light or has a feature of high luminance, and can illuminate a document (film) or the like with a sufficient amount of light.
On the other hand, when a point-like light source is used, the original (film) is illuminated by condensing a light beam radiated from the point-like light source to the surroundings using a condenser lens or the like to form a parallel light beam or a convergent light beam. And improve the lighting efficiency.
【０００３】点状光源を用いてある一定領域の範囲を照
射する為には点状光源の位置から照明する位置まで一定
の距離が必要となる。この為、例えば特開平1-230274号
公報で提案されているように点状光源から発光される光
束を光学系を介して平行光束とし、これを複数並べて線
状光源を得るものがある。また点状光源をコンデンサー
レンズ等を用いて集光して原稿を照明する場合、照明光
の明るさは点状光源のもつ明るさに制限される。そこで
より明るい照明を得る為に複数の点状光源を並べて発光
させ、これをコンデンサーレンズ等で集光し、照明光と
して用いるものがある。In order to illuminate a certain area using a point light source, a certain distance is required from the position of the point light source to the position to be illuminated. For this reason, for example, as proposed in Japanese Patent Application Laid-Open No. 1-230274, a light beam emitted from a point light source is converted into a parallel light beam via an optical system, and a plurality of these light beams are arranged to obtain a linear light source. When a document is illuminated by condensing a point light source using a condenser lens or the like, the brightness of the illumination light is limited to the brightness of the point light source. In order to obtain brighter illumination, there is a type in which a plurality of point-like light sources are arranged side by side to emit light, which are condensed by a condenser lens or the like, and used as illumination light.
【０００４】[0004]
【発明が解決しようとする課題】点状光源から発光され
る光束を光学系を介して平行光束とし、これを複数並べ
て線状光源としたとき、得られる光束は指向性の高い平
行光束である。この線状光源で拡散性の低い原稿（フィ
ルム）等を照明し、該原稿面上の画像を結像させて画像
を得る場合においては、該原稿を透過する光束も指向性
の高い光束である為、結像の為の集光効率は低い。この
ため結像光学系の口径を大きくする等の処置が必要とな
る。When a light beam emitted from a point light source is converted into a parallel light beam via an optical system, and a plurality of these light beams are arranged to form a linear light source, the obtained light beam is a parallel light beam having high directivity. . When an original (film) or the like having low diffusivity is illuminated by the linear light source and an image is formed by forming an image on the original surface, the light flux transmitted through the original is also a highly directional light flux. Therefore, the light collection efficiency for image formation is low. For this reason, measures such as increasing the diameter of the imaging optical system are required.
【０００５】また複数の点状光源を並べて発光させ、こ
れをコンデンサーレンズ等で集光し、照明光として用い
るものについては複数の点状光源の位置が異なってい
る。このように異なる位置から発せられる光束をある一
定の領域に集光する為には各点状光源を円弧状に並べる
等、一定の位置関係を満たす必要がある。また直線状に
並べる場合には屈曲角を各点状光源の位置で変えたプリ
ズムを並べること等が必要となる。A plurality of point light sources are arranged side by side to emit light, which are condensed by a condenser lens or the like and used as illumination light. The positions of the plurality of point light sources are different. In order to converge light beams emitted from different positions in a certain area as described above, it is necessary to satisfy a certain positional relationship, such as arranging each point light source in an arc shape. In the case of arranging the prisms linearly, it is necessary to arrange prisms whose bending angles are changed at the positions of the point light sources.
【０００６】一般に光学系の口径を大きくすることは製
造価格をあげることになる。また各点状光源を精度良く
位置関係を満たして並べることは難しい。また異なる屈
曲角のプリズムを作成し、これを並べることは製造時に
おいて位置調整等の困難を伴う。In general, increasing the diameter of an optical system increases the manufacturing cost. In addition, it is difficult to arrange the point light sources with high accuracy to satisfy the positional relationship. In addition, creating prisms having different bending angles and arranging them involves difficulties such as position adjustment during manufacturing.
【０００７】本発明は発光デバイスを構成する各要素を
適切に設定することにより、照明効率の高い、明るい照
明光を得ることができ、またこの発光デバイスを画像読
取装置の照明手段として用いることにより高精度な画像
読取りができる発光デバイス及びそれを用いた画像読取
装置の提供を目的とする。According to the present invention, it is possible to obtain bright illumination light with high illumination efficiency by appropriately setting each element constituting the light emitting device, and to use the light emitting device as an illumination means of an image reading apparatus. It is an object of the present invention to provide a light emitting device capable of reading an image with high accuracy and an image reading apparatus using the same.
【０００８】[0008]
【課題を解決するための手段】本発明の発光デバイス
は、(1) 複数の光源部と、該複数の光源部から各々発光
した光束の状態を該複数の光源部に対して同方向に向か
う平行光束に変換する該複数の光源部に対応して各々設
けられた第１の光学機能部と、該複数の第１の光学機能
部により平行光束に変換された各々の光束を同一位置に
集光させる第２の光学機能部とを有していることを特徴
としている。According to the present invention, there is provided a light emitting device comprising: (1) a plurality of light source sections and a state of a light beam emitted from each of the plurality of light source sections is directed in the same direction with respect to the plurality of light source sections. A first optical function unit provided for each of the plurality of light source units for converting into a parallel light beam, and respective light beams converted into a parallel light beam by the plurality of first optical function units are collected at the same position. And a second optical function unit for emitting light.
【０００９】特に(1-1) 前記第１の光学機能部は凹面状
反射面より成ることや、(1-2) 前記第１の光学機能部は
凸レンズより成ることや、(1-3) 前記凹面状反射面は前
記光源部の発光面を略焦点位置とする放物面より成るこ
とや、(1-4) 前記凸レンズは前記光源部の発光面を略焦
点位置となるように配置されていることや、(1-5) 前記
第２の光学機能部は１つの凸レンズより成ることや、(1
-6) 前記複数の光源部は各々複数の発光素子を有してい
ることや、(1-7) 前記複数の発光素子は、その発光波長
が互いに異なること、等を特徴としている。In particular, (1-1) the first optical function section is formed of a concave reflecting surface, (1-2) the first optical function section is formed of a convex lens, (1-3) The concave reflecting surface may be formed of a paraboloid having a light emitting surface of the light source unit as a substantially focal position, or (1-4) the convex lens may be disposed such that a light emitting surface of the light source unit is substantially at a focal position. (1-5) that the second optical function unit is formed of one convex lens, (1-5)
-6) Each of the plurality of light source units has a plurality of light emitting elements, and (1-7) the plurality of light emitting elements have different emission wavelengths.
【００１０】本発明の画像読取装置は、(2) 発光デバイ
スから発光された光束により原稿を照明し、該照明され
た原稿からの光束を結像光学系により読取手段面上に結
像させて該原稿の画像情報を読取る画像読取装置におい
て、該発光デバイスは、複数の光源部と、該複数の光源
部から各々発光した光束の状態を該複数の光源部に対し
て同方向に向かう平行光束に変換する該複数の光源部に
対応して各々設けられた第１の光学機能部と、該複数の
第１の光学機能部により平行光束に変換された各々の光
束を同一位置に集光させる第２の光学機能部とを有して
いることを特徴としている。(2) The image reading apparatus of the present invention illuminates a document with a light beam emitted from a light emitting device, and forms an image of the illuminated light beam from the document on a reading means surface by an image forming optical system. In the image reading apparatus for reading image information of the document, the light emitting device may include a plurality of light source units, and a parallel light beam directed in a same direction with respect to the plurality of light source units by changing a state of light beams emitted from the plurality of light source units. A first optical function unit provided for each of the plurality of light source units for converting the light into a parallel light beam, and the light beams converted into parallel light beams by the plurality of first optical function units are condensed at the same position. And a second optical function unit.
【００１１】特に(2-1) 前記第１の光学機能部は凹面状
反射面より成ることや、(2-2) 前記第１の光学機能部は
凸レンズより成ることや、(2-3) 前記凹面状反射面は前
記光源部の発光面を略焦点位置とする放物面より成るこ
とや、(2-4) 前記凸レンズは前記光源部の発光面を略焦
点位置となるように配置されていることや、(2-5) 前記
第２の光学機能部は１つの凸レンズより成ることや、(2
-6) 前記複数の光源部は各々複数の発光素子を有してい
ることや、(2-7) 前記複数の発光素子は、その発光波長
が互いに異なること、等を特徴としている。In particular, (2-1) the first optical function section is formed of a concave reflecting surface, (2-2) the first optical function section is formed of a convex lens, (2-3) The concave reflecting surface may be formed of a paraboloid having a light emitting surface of the light source unit as a substantially focal position, or (2-4) the convex lens may be disposed such that a light emitting surface of the light source unit is substantially at a focal position. (2-5) that the second optical function part is formed of one convex lens, (2-5)
-6) Each of the plurality of light source units has a plurality of light emitting elements, and (2-7) each of the plurality of light emitting elements has a different emission wavelength.
【００１２】[0012]
【発明の実施の形態】（実施形態１）図１（Ａ），
（Ｂ），（Ｃ）は各々本発明の実施形態１の発光デバイ
スの要部概略図である。同図（Ａ）は発光デバイスから
光束が発せられる方向からみた正面図、同図（Ｂ）は発
光デバイスの長手方向の要部断面図、同図（Ｃ）は発光
デバイスの短手方向の要部断面図である。(Embodiment 1) FIG. 1 (A),
(B), (C) is a schematic diagram of a main part of the light emitting device of the first embodiment of the present invention, respectively. 2A is a front view of the light emitting device as viewed from a direction in which a light beam is emitted, FIG. 2B is a cross-sectional view of a main part of the light emitting device in a longitudinal direction, and FIG. It is a fragmentary sectional view.
【００１３】図中、１は光源部であり、例えば発光素子
としての発光ダイオード（ＬＥＤ）より成っており、１
次元方向（長手方向）に複数配されている。この複数の
光源部１は各々不図示のリードフレームや金ワイヤーを
介して外部から電流が供給されることにより光束を発光
する。In FIG. 1, reference numeral 1 denotes a light source unit, which comprises, for example, a light emitting diode (LED) as a light emitting element.
A plurality are arranged in the dimensional direction (longitudinal direction). Each of the plurality of light source units 1 emits a light beam when an electric current is supplied from the outside through a lead frame or a gold wire (not shown).
【００１４】２は第１の光学機能部であり、複数の光源
部１に対応して各々配置されている。複数の第１の光学
機能部２は各々対応する光源部１の発光面に対向する透
光性樹脂４の端面を凸形状に形成し、その凸面状端面を
金属蒸着等を行い鏡面加工することによって形成されて
おり、凹面状反射面として機能している。この凹面状反
射面は光源部１の発光面を略焦点位置とする放物面より
形成されており、更に各第１の光学機能部２の放物面の
軸は同方向になるように構成されている。本実施形態に
おける複数の第１の光学機能部２は各々対応する光源部
１の発光面から発光された光束を後述する第２の光学機
能部３の方向へ反射させ、かつ複数の光源部１に対して
同方向に向かう平行光束に変換している。Reference numeral 2 denotes a first optical function unit, which is disposed corresponding to each of the plurality of light source units 1. The plurality of first optical function units 2 each have an end surface of the translucent resin 4 facing the light emitting surface of the corresponding light source unit 1 formed in a convex shape, and the convex end surface is mirror-finished by metal deposition or the like. And functions as a concave reflecting surface. The concave reflecting surface is formed of a paraboloid having the light emitting surface of the light source unit 1 as a substantially focal point, and the axes of the parabolic surfaces of the first optical function units 2 are arranged in the same direction. Have been. The plurality of first optical function units 2 in the present embodiment reflect the light emitted from the light emitting surface of the corresponding light source unit 1 in the direction of a second optical function unit 3 described later, and the plurality of light source units 1. Is converted into a parallel light beam directed in the same direction.
【００１５】３は第２の光学機能部であり、例えば透光
性樹脂やガラス材により形成された１つの凸レンズより
成っている。本実施形態における第２の光学機能部３は
複数の光源部１及びこれに対向して設けられた複数の第
１の光学機能部２を覆うように配置形成されており、複
数の第１の光学機能部２により平行光束に変換された各
々の光束を同一位置Ｐに集光させている。Reference numeral 3 denotes a second optical function part, which is composed of, for example, one convex lens formed of a translucent resin or a glass material. The second optical function unit 3 in the present embodiment is arranged and formed so as to cover the plurality of light source units 1 and the plurality of first optical function units 2 provided to face the plurality of light source units 1. Each light beam converted into a parallel light beam by the optical function unit 2 is focused on the same position P.
【００１６】４は光透過性部であり、例えば透光性エポ
キシ樹脂等から成っている。上記の第１の光学機能部２
はこの光透過性部４の端面に形成されている。Reference numeral 4 denotes a light transmitting portion, which is made of, for example, a light transmitting epoxy resin. First optical function unit 2 described above
Is formed on the end face of the light transmitting portion 4.
【００１７】図２は本発明の実施形態１の発光デバイス
の長手方向の要部断面図及びその光路図である。同図に
おいて図１に示した要素と同一要素には同符番を付して
いる。FIG. 2 is a sectional view of a main part in a longitudinal direction of the light emitting device according to the first embodiment of the present invention and an optical path diagram thereof. In the figure, the same elements as those shown in FIG. 1 are denoted by the same reference numerals.
【００１８】同図においては不図示のリードフレーム及
び金ワイヤーを介して光源部としての発光ダイオード１
に電流が供給されると各々の発光ダイオード１の発光面
から対応する第１の光学機能部２側へ向かって光束を発
光する。そして複数の第１の光学機能部２で反射された
各々の光束は複数の光源部１に対して同方向に向かう平
行光束に変換されて第２の光学機能部３に入射する。そ
して第２の光学機能部３を透過した各々の光束は任意の
同一位置Ｐに集光する。In FIG. 1, a light emitting diode 1 as a light source section is connected via a lead frame (not shown) and gold wires.
When a current is supplied to the light emitting diode 1, a light beam is emitted from the light emitting surface of each light emitting diode 1 toward the corresponding first optical function unit 2. Each of the light beams reflected by the plurality of first optical function units 2 is converted into a parallel light beam directed in the same direction to the plurality of light source units 1 and enters the second optical function unit 3. Each light beam transmitted through the second optical function unit 3 is condensed at an arbitrary position P.
【００１９】このように本実施形態における発光デバイ
スは上述の如く簡単な構成で、集光効率の高い、明るい
照明光を容易に得ることができる。As described above, the light emitting device according to the present embodiment can easily obtain bright illumination light having high light-collecting efficiency with the simple configuration as described above.
【００２０】（実施形態２）図３（Ａ），（Ｂ），
（Ｃ）は各々本発明の実施形態２の発光デバイスの要部
概略図である。同図（Ａ）は発光デバイスから光束が発
せられる方向からみた正面図、同図（Ｂ）は発光デバイ
スの長手方向の要部断面図、同図（Ｃ）は発光デバイス
の短手方向の要部断面図である。同図において図１に示
した要素と同一要素には同符番を付している。(Embodiment 2) FIGS. 3 (A), 3 (B),
(C) is a principal part schematic diagram of the light emitting device of Embodiment 2 of the present invention, respectively. 2A is a front view of the light emitting device as viewed from a direction in which a light beam is emitted, FIG. 2B is a cross-sectional view of a main part of the light emitting device in a longitudinal direction, and FIG. It is a fragmentary sectional view. In the figure, the same elements as those shown in FIG. 1 are denoted by the same reference numerals.
【００２１】本実施形態において前述の実施形態１と特
に異なる点は第１の光学機能部を凸レンズより構成し、
光源部に対して第２の光学機能部側へ配置して発光デバ
イスを構成したことである。その他の構成及び光学的作
用は前述の実施形態１と略同様であり、これにより同様
な効果を得ている。The present embodiment is particularly different from the above-described first embodiment in that the first optical function section is constituted by a convex lens.
That is, the light emitting device is configured by disposing the light source unit on the second optical function unit side. Other configurations and optical functions are substantially the same as those of the first embodiment, and thus the same effects are obtained.
【００２２】即ち、図中、１２は第１の光学機能部であ
り、複数の光源部１に対応して各々配置されている。複
数の第１の光学機能部１２は各々対応する光源部１の発
光面に対向して透光性樹脂やガラス材等を用いて形成さ
れており、凸レンズとして機能している。この凸レンズ
１２は光源部１の発光面を略焦点位置となるように配置
されており、更に各第１の光学機能部１２の凸レンズ１
２の光軸は同方向になるように構成されている。本実施
形態における複数の第１の光学機能部１２は各々対応す
る光源部１の発光面から発光された光束を複数の光源部
１に対して同方向に向かう平行光束に変換して第２の光
学機能部３へ導いている。That is, in the figure, reference numeral 12 denotes a first optical function unit, which is arranged corresponding to the plurality of light source units 1. The plurality of first optical function units 12 are each formed of a translucent resin, a glass material, or the like, facing the light emitting surface of the corresponding light source unit 1, and function as convex lenses. The convex lens 12 is disposed so that the light emitting surface of the light source unit 1 is located substantially at the focal position.
The two optical axes are configured to be in the same direction. The plurality of first optical function units 12 in the present embodiment convert the luminous flux emitted from the light emitting surface of the corresponding light source unit 1 into a parallel luminous flux directed in the same direction with respect to the plurality of light source units 1, and perform the second It leads to the optical function unit 3.
【００２３】図４は本発明の実施形態２の発光デバイス
の長手方向の要部断面図及びその光路図である。同図に
おいて図３に示した要素と同一要素には同符番を付して
いる。FIG. 4 is a longitudinal sectional view of an essential part of a light emitting device according to a second embodiment of the present invention and an optical path diagram thereof. In the figure, the same elements as those shown in FIG. 3 are denoted by the same reference numerals.
【００２４】同図においては不図示のリードフレーム及
び金ワイヤーを介して光源部１としての発光ダイオード
に電流が供給されると各々の発光ダイオード１の発光面
から対応する第１の光学機能部１２側へ向かって光束を
発光する。そして複数の第１の光学機能部１２を透過し
た各々の光束は複数の光源部１に対して同方向に向かう
平行光束に変換されて第２の光学機能部３に入射する。
そして第２の光学機能部３を透過した各々の光束は任意
の同一位置Ｐに集光する。In FIG. 1, when a current is supplied to the light emitting diodes serving as the light source unit 1 through a lead frame and a gold wire (not shown), the corresponding first optical function unit 12 is emitted from the light emitting surface of each light emitting diode 1. A light beam is emitted toward the side. Each light beam transmitted through the plurality of first optical function units 12 is converted into a parallel light beam directed in the same direction with respect to the plurality of light source units 1 and is incident on the second optical function unit 3.
Each light beam transmitted through the second optical function unit 3 is condensed at an arbitrary position P.
【００２５】このように本実施形態における発光デバイ
スは上述の如く簡単な構成で、集光効率の高い、明るい
照明光を容易に得ることができる。As described above, the light emitting device according to the present embodiment can easily obtain bright illumination light having high light-collecting efficiency with the simple configuration as described above.
【００２６】尚、上述した各実施形態においては光源部
１を１つの発光ダイオードより構成したが、これに限定
されることはなく、例えば光源部１の発光面の面積が大
きく広がるものでなければ複数の発光ダイオードより構
成しても良い。また光源部１を構成する複数の発光ダイ
オードとして同じ発光ダイオードを用いることにより、
より明るい照明光を得ることができる。また光源部１を
構成する複数の発光ダイオードとして発光波長の異なる
ものを用いることにより、異なる波長成分をもつ照明光
を得ることができる。更に光源部１を構成する複数の発
光ダイオードとして互いに発光波長の異なるものを用い
た場合においては、これらの異なる発光波長の発光ダイ
オードを各々順次発光させることにより、異なる発光波
長の光束で例えばカラーフィルム等の原稿を照明するこ
とができる。In each of the embodiments described above, the light source unit 1 is constituted by one light emitting diode. However, the present invention is not limited to this. For example, unless the light emitting surface of the light source unit 1 has a large area. A plurality of light emitting diodes may be used. In addition, by using the same light emitting diode as a plurality of light emitting diodes constituting the light source unit 1,
Brighter illumination light can be obtained. Further, by using light emitting diodes having different emission wavelengths as the plurality of light emitting diodes constituting the light source unit 1, illumination light having different wavelength components can be obtained. Further, when a plurality of light emitting diodes constituting the light source unit 1 having different light emission wavelengths are used, the light emitting diodes having different light emission wavelengths are sequentially emitted, respectively, so that light beams having different light emission wavelengths are used, for example, in a color film. Etc. can be illuminated.
【００２７】尚、上述した各実施形態では複数の光源部
を線状（１次元）に並べて構成したが、これに限定され
るものではなく、例えば複数の光源部を面上に並べ２次
元の面状光源としても実施することもできる。これによ
り集光効率の良い、明るい面状照明光を得ることができ
る。In each of the embodiments described above, the plurality of light source units are arranged linearly (one-dimensionally). However, the present invention is not limited to this. For example, a plurality of light source units are arranged on a plane and two-dimensionally arranged. It can also be implemented as a planar light source. This makes it possible to obtain bright planar illumination light with high light-collecting efficiency.
【００２８】（実施形態４）図５は本発明の発光デバイ
スをフィルムスキャナー等の画像読取装置に用いたとき
の要部構成図である。同図において図１に示した要素と
同一要素には同符番を付している。(Embodiment 4) FIG. 5 is a diagram showing the main parts when the light emitting device of the present invention is used in an image reading apparatus such as a film scanner. In the figure, the same elements as those shown in FIG. 1 are denoted by the same reference numerals.
【００２９】同図において５１は発光デバイスであり、
前述した実施形態１に示した構成より成っている。５２
はフィルム等の透過型の原稿であり、読取りの為の画像
情報が形成されている。５３は結像光学系（撮像光学
系）としての結像レンズであり、原稿５２の画像情報を
後述する読取手段面上に結像させている。５４は読取手
段としてのラインセンサー（ＣＣＤ）であり、複数の画
素（受光素子）を一次元的に配列している。In the figure, reference numeral 51 denotes a light emitting device;
It has the configuration shown in the first embodiment. 52
Is a transmission type original such as a film, on which image information for reading is formed. Reference numeral 53 denotes an image forming lens serving as an image forming optical system (imaging optical system), which forms image information of the document 52 on a reading unit surface described later. Reference numeral 54 denotes a line sensor (CCD) as a reading unit, in which a plurality of pixels (light receiving elements) are arranged one-dimensionally.
【００３０】本実施形態での第２の光学機能部３は複数
の第１の光学機能部２によって反射された複数の光源部
１からの光束を結像レンズ５３の入射瞳位置近傍に集光
するようにしている。即ち複数の光源部１の発光面が入
射瞳位置近傍に結像するように各光学要素を設定してい
る。The second optical function unit 3 in this embodiment condenses the light beams from the plurality of light source units 1 reflected by the plurality of first optical function units 2 near the entrance pupil position of the imaging lens 53. I am trying to do it. That is, each optical element is set so that the light emitting surfaces of the plurality of light source units 1 form images near the entrance pupil position.
【００３１】本実施形態では発光デバイス５１から発光
された光束で原稿５２面上の１次元状の読取領域を照明
し、該原稿５２面上の画像情報を結像レンズ５３により
ラインセンサー５４面上に所定の倍率で結像させてい
る。そして原稿５２とラインセンサー５４との相対位置
を変化させて原稿５２面上の２次元的な画像情報をライ
ンセンサーで順次読取っている。尚原稿５２を透過した
光束は該原稿５２により僅かに拡散されるが殆どの光束
は結像レンズ５３に入射する。In this embodiment, a one-dimensional reading area on the surface of the original 52 is illuminated with a light beam emitted from the light emitting device 51, and image information on the surface of the original 52 is reflected on the line sensor 54 by the imaging lens 53. At a predetermined magnification. By changing the relative position between the document 52 and the line sensor 54, two-dimensional image information on the surface of the document 52 is sequentially read by the line sensor. The light beam transmitted through the document 52 is slightly diffused by the document 52, but most of the light beam enters the imaging lens 53.
【００３２】このように本実施形態では上述した構成よ
り成る発光デバイス５１を画像読取装置の照明手段とし
て用いることにより、集光効率の高い、明るい照明光で
原稿を照明することができ、これにより原稿５２面上の
画像情報をラインセンサー５４で高精度に読取ることが
できる．本実施形態においては図５に示すように発光デ
バイス５１から発光された光束は原稿５２を斜めに透過
する。原稿５２がカラー原稿である場合には、各色材は
原稿の厚み方向に層状に配置されている。これを斜めに
透過した光束を用いてラインセンサー５４面上に結像さ
せたとき、色材層によりその結像状態がラインセンサー
５４面上で異なり、色ずれ等が生じる場合がある。しか
しながら、このような場合においては発光デバイス５１
で照射する光束の波長に同期させて、例えば結像レンズ
５３、原稿５２、そしてラインセンサー５４等を所定方
向に駆動させ、色材層の色画像を異なる結像状態で撮像
することで容易に補正することができる。また得られた
色画像を撮像後の後処理において画像処理を行うことに
より補正することができる。As described above, in the present embodiment, by using the light emitting device 51 having the above-described configuration as the illuminating means of the image reading apparatus, the original can be illuminated with bright illuminating light having a high light-collecting efficiency. Image information on the surface of the document 52 can be read with high accuracy by the line sensor 54. In the present embodiment, as shown in FIG. 5, a light beam emitted from the light emitting device 51 transmits through the document 52 obliquely. When the original 52 is a color original, the respective color materials are arranged in layers in the thickness direction of the original. When this is imaged on the surface of the line sensor 54 using the light beam transmitted obliquely, the image formation state differs on the surface of the line sensor 54 due to the color material layer, and color shift or the like may occur. However, in such a case, the light emitting device 51
In synchronization with the wavelength of the luminous flux to be irradiated, for example, the imaging lens 53, the document 52, the line sensor 54, and the like are driven in a predetermined direction, and the color images of the color material layers are easily captured in different imaging states. Can be corrected. Further, the obtained color image can be corrected by performing image processing in post-processing after imaging.
【００３３】このように本実施形態では上述した発光デ
バイス５１をフィルムスキャナー等の画像読取装置に用
いることにより、ラインセンサー５４により光量を有効
に使って、原稿５２面上の画像を撮像することができ
る。As described above, in the present embodiment, by using the light emitting device 51 described above for an image reading device such as a film scanner, an image on the surface of the original 52 can be captured by effectively using the light amount by the line sensor 54. it can.
【００３４】[0034]
【発明の効果】本発明は発光デバイスを構成する各要素
を適切に設定することにより、照明効率の高い、明るい
照明光を得ることができ、またこの発光デバイスを画像
読取装置の照明手段として用いることにより高精度な画
像読取りができる発光デバイス及びそれを用いた画像読
取装置を達成することができる。According to the present invention, it is possible to obtain bright illumination light with high illumination efficiency by appropriately setting each element constituting the light emitting device, and use this light emitting device as illumination means of an image reading apparatus. Thus, a light emitting device capable of reading an image with high accuracy and an image reading apparatus using the same can be achieved.
【図１】 本発明の実施形態１の発光デバイスの要部概
略図FIG. 1 is a schematic diagram of a main part of a light emitting device according to a first embodiment of the present invention.
【図２】 本発明の実施形態１の発光デバイスの長手方
向の要部断面図（光路図）FIG. 2 is a cross-sectional view (optical path diagram) of a main part of the light emitting device according to the first embodiment of the present invention in the longitudinal direction.
【図３】 本発明の実施形態１の発光デバイスの要部概
略図FIG. 3 is a schematic diagram of a main part of the light emitting device according to the first embodiment of the present invention.
【図４】 本発明の実施形態２の発光デバイスの長手方
向の要部断面図（光路図）FIG. 4 is a sectional view (an optical path diagram) of a main part in a longitudinal direction of a light emitting device according to a second embodiment of the present invention.
【図５】 本発明の発光デバイスをフィルムスキャナー
等の画像読取装置に用いたときの要部構成図FIG. 5 is a main part configuration diagram when the light emitting device of the present invention is used in an image reading device such as a film scanner.
１ 光源部 ２，１２ 第１の光学機能部 ３ 第２の光学機能部 ４ 光透過性部 ５１ 発光デバイス ５２ 原稿 ５３ 結像光学系 ５４ 読取手段 DESCRIPTION OF SYMBOLS 1 Light source part 2,12 1st optical function part 3 2nd optical function part 4 Light transmissive part 51 Light emitting device 52 Document 53 Imaging optical system 54 Reading means
Claims (16)
々発光した光束の状態を該複数の光源部に対して同方向
に向かう平行光束に変換する該複数の光源部に対応して
各々設けられた第１の光学機能部と、該複数の第１の光
学機能部により平行光束に変換された各々の光束を同一
位置に集光させる第２の光学機能部とを有していること
を特徴とする発光デバイス。1. A plurality of light source units and a plurality of light source units that convert a state of light beams emitted from the plurality of light source units into a parallel light beam directed in the same direction with respect to the plurality of light source units. It has a first optical function unit provided for each, and a second optical function unit for condensing each light beam converted into a parallel light beam by the plurality of first optical function units at the same position. A light emitting device characterized by the above-mentioned.
り成ることを特徴とする請求項１記載の発光デバイス。2. The light emitting device according to claim 1, wherein said first optical function part comprises a concave reflecting surface.
ることを特徴とする請求項１記載の発光デバイス。3. The light emitting device according to claim 1, wherein said first optical function part is formed of a convex lens.
を略焦点位置とする放物面より成ることを特徴とする請
求項２記載の発光デバイス。4. The light emitting device according to claim 2, wherein said concave reflecting surface is a paraboloid having a light emitting surface of said light source section as a substantially focal position.
焦点位置となるように配置されていることを特徴とする
請求項３記載の発光デバイス。5. The light-emitting device according to claim 3, wherein the convex lens is arranged so that a light-emitting surface of the light source unit is located substantially at a focal position.
より成ることを特徴とする請求項１記載の発光デバイ
ス。6. The light emitting device according to claim 1, wherein said second optical function part is formed of one convex lens.
を有していることを特徴とする請求項１記載の発光デバ
イス。7. The light emitting device according to claim 1, wherein each of the plurality of light source units has a plurality of light emitting elements.
互いに異なることを特徴とする請求項７記載の発光デバ
イス。8. The light emitting device according to claim 7, wherein the plurality of light emitting elements have different emission wavelengths.
原稿を照明し、該照明された原稿からの光束を結像光学
系により読取手段面上に結像させて該原稿の画像情報を
読取る画像読取装置において、 該発光デバイスは、複数の光源部と、該複数の光源部か
ら各々発光した光束の状態を該複数の光源部に対して同
方向に向かう平行光束に変換する該複数の光源部に対応
して各々設けられた第１の光学機能部と、該複数の第１
の光学機能部により平行光束に変換された各々の光束を
同一位置に集光させる第２の光学機能部とを有している
ことを特徴とする画像読取装置。9. An image reading device for illuminating a document with a light beam emitted from a light emitting device, forming an image of the light beam from the illuminated document on a reading unit surface by an image forming optical system, and reading image information of the document. In the apparatus, the light emitting device includes a plurality of light source units, and the plurality of light source units that convert a state of a light beam emitted from each of the plurality of light source units into a parallel light beam directed in the same direction with respect to the plurality of light source units. A first optical function unit provided for each of the plurality of first optical function units;
And a second optical function unit for condensing each light beam converted into a parallel light beam by the optical function unit at the same position.
より成ることを特徴とする請求項９記載の画像読取装
置。10. The image reading apparatus according to claim 9, wherein said first optical function section comprises a concave reflecting surface.
成ることを特徴とする請求項９記載の画像読取装置。11. The image reading apparatus according to claim 9, wherein said first optical function section is formed of a convex lens.
面を略焦点位置とする放物面より成ることを特徴とする
請求項１０記載の画像読取装置。12. The image reading apparatus according to claim 10, wherein the concave reflecting surface is a parabolic surface having a light emitting surface of the light source unit as a substantially focal point.
略焦点位置となるように配置されていることを特徴とす
る請求項１１記載の画像読取装置。13. The image reading apparatus according to claim 11, wherein the convex lens is disposed so that a light emitting surface of the light source unit is located substantially at a focal position.
ズより成ることを特徴とする請求項９記載の画像読取装
置。14. The image reading apparatus according to claim 9, wherein said second optical function section is formed of one convex lens.
子を有していることを特徴とする請求項９記載の画像読
取装置。15. The image reading apparatus according to claim 9, wherein each of the plurality of light sources has a plurality of light emitting elements.
が互いに異なることを特徴とする請求項１５記載の画像
読取装置。16. The image reading apparatus according to claim 15, wherein the plurality of light emitting elements have different emission wavelengths.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10292963A JP2000114603A (en) | 1998-09-30 | 1998-09-30 | Light emitting device and image reading device using the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10292963A JP2000114603A (en) | 1998-09-30 | 1998-09-30 | Light emitting device and image reading device using the same |
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| Publication Number | Publication Date |
|---|---|
| JP2000114603A true JP2000114603A (en) | 2000-04-21 |
Family
ID=17788704
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10292963A Pending JP2000114603A (en) | 1998-09-30 | 1998-09-30 | Light emitting device and image reading device using the same |
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| Country | Link |
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| JP (1) | JP2000114603A (en) |
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| JP2007214488A (en) * | 2006-02-13 | 2007-08-23 | Aiden:Kk | Led light source apparatus |
| EP1657757A3 (en) * | 2004-11-12 | 2010-03-24 | Philips Lumileds Lighting Company LLC | Semiconductor light emitting device with bonded optical element and method of manufacturing the same |
| JP2010199435A (en) * | 2009-02-26 | 2010-09-09 | Ｈｏｙａ Ｃａｎｄｅｏ Ｏｐｔｒｏｎｉｃｓ株式会社 | Light irradiation device |
| JP2011223044A (en) * | 2000-04-26 | 2011-11-04 | Osram Opto Semiconductors Gmbh | Light discharging semiconductor element provided with luminescence conversion element |
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| JP2011223044A (en) * | 2000-04-26 | 2011-11-04 | Osram Opto Semiconductors Gmbh | Light discharging semiconductor element provided with luminescence conversion element |
| EP1657757A3 (en) * | 2004-11-12 | 2010-03-24 | Philips Lumileds Lighting Company LLC | Semiconductor light emitting device with bonded optical element and method of manufacturing the same |
| US8748912B2 (en) | 2004-11-12 | 2014-06-10 | Philips Lumileds Lighting Company Llc | Common optical element for an array of phosphor converted light emitting devices |
| US8846423B2 (en) | 2004-11-12 | 2014-09-30 | Philips Lumileds Lighting Company Llc | Bonding an optical element to a light emitting device |
| EP1657757B1 (en) | 2004-11-12 | 2017-05-10 | Philips Lumileds Lighting Company LLC | Method of manufacturing a semiconductor light emitting device with bonded optical element |
| JP2007214488A (en) * | 2006-02-13 | 2007-08-23 | Aiden:Kk | Led light source apparatus |
| JP2010199435A (en) * | 2009-02-26 | 2010-09-09 | Ｈｏｙａ Ｃａｎｄｅｏ Ｏｐｔｒｏｎｉｃｓ株式会社 | Light irradiation device |
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