JPS6262322A - Optical printer - Google Patents

Optical printer

Info

Publication number
JPS6262322A
JPS6262322A JP60203096A JP20309685A JPS6262322A JP S6262322 A JPS6262322 A JP S6262322A JP 60203096 A JP60203096 A JP 60203096A JP 20309685 A JP20309685 A JP 20309685A JP S6262322 A JPS6262322 A JP S6262322A
Authority
JP
Japan
Prior art keywords
distance
light emitting
rod lens
emitting diode
diode array
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
Application number
JP60203096A
Other languages
Japanese (ja)
Inventor
Hiromi Ogata
緒方 弘美
Naotaro Nakada
直太郎 中田
Hideo Taniguchi
秀夫 谷口
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Rohm Co Ltd
Original Assignee
Rohm Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Rohm Co Ltd filed Critical Rohm Co Ltd
Priority to JP60203096A priority Critical patent/JPS6262322A/en
Publication of JPS6262322A publication Critical patent/JPS6262322A/en
Pending legal-status Critical Current

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  • Dot-Matrix Printers And Others (AREA)
  • Printers Or Recording Devices Using Electromagnetic And Radiation Means (AREA)
  • Exposure Or Original Feeding In Electrophotography (AREA)
  • Optical Systems Of Projection Type Copiers (AREA)

Abstract

PURPOSE:To make high dicing accuracy unnecessary and to facilitate die bonding work by setting the distance from a light emitting array element to a focusing rod lens larger than the distance from the rod lens to a photosensitive body. CONSTITUTION:Light emitting diode array elements 11 (11a-11d) are arrayed at a constant interval on a substrate 12, incident end surfaces of the condensing rod lenses 14 (14a-14d) at the same pitch are positioned, a distance L1 apart from the surface of said elements, and then the surface of a photosensitive drum 13 is placed, a distance L2 apart from the emitting end surface of the lens. By setting the distance L2 larger than the L1, a light emitting dot of the element 11 is image-formed on the surface of the photosensitive body at more than one magnification. The mutual spaces of the rod lenses 14 are filled with black silicone resin 15 to form a single body. Therefore, the high dicing accuracy is not needed and the die bonding work can be facilitated.

Description

【発明の詳細な説明】 (産業上の利用分野) 本発明は光プリンタに係り、特には、複数個の発光ダイ
オード・アレイ素子と、感光体との間に集束性ロッドレ
ンズを介在させてなる光プリンタに関する。
DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an optical printer, and more particularly, to an optical printer in which a focusing rod lens is interposed between a plurality of light emitting diode array elements and a photoreceptor. Regarding optical printers.

(従来の技術) 従来、この種の光プリンタは、集束性光伝送体を介して
感光体表面に結像される発光ダイオード・アレイ素子の
発光ドツトを一定間隔にする必要性から、第3図に示す
ように、複数個の発光ダイオード・アレイ素子1 a 
−1cをそれぞれ隣接させて、長手方向に一列に配置し
、各素子のドツト2の間隔が一定になるようにしている
(Prior Art) Conventionally, in this type of optical printer, the light-emitting dots of the light-emitting diode array element, which are imaged on the surface of the photoreceptor through the converging light transmitter, must be spaced at regular intervals, as shown in FIG. As shown in , a plurality of light emitting diode array elements 1 a
-1c are arranged adjacent to each other in a line in the longitudinal direction so that the spacing between the dots 2 of each element is constant.

このことから容易に理解されるように、一枚のウェハか
ら各素子を切断分離するダイシングの精度が悪いと、各
素子を隣接させても両端のドツト同士の間隔B1が、素
子内のドツト間隔B2と同じにならないため、高い印字
品質が得られない。
As can be easily understood from this, if the accuracy of dicing for cutting and separating each element from a single wafer is poor, even if the elements are placed adjacent to each other, the distance B1 between the dots at both ends will be the same as the dot interval within the element. Since it is not the same as B2, high printing quality cannot be obtained.

このように、従来の光プリンタは、発光ダイオード・ア
レイ素子のダイシング精度を極めて高くする必要があり
、そのために作業効率が低く、また、製品歩留りも低く
なるという問題点がある。
As described above, conventional optical printers require extremely high dicing accuracy for light emitting diode array elements, which causes problems such as low work efficiency and low product yield.

さらに、発光ダイオード・アレイ素子を基板に固着する
グイボンディング作業において、前述したように各素子
を隣接させる作業は、次のような理由から大変煩わしく
、また、困難を伴う。即ち、一つの素子をグイボンディ
ングしている際に、すでに配列された素子に接触して、
その配列を乱し、あるいは素子表面に傷をつけたり、素
子表面をプリフォーム材で汚すことなどがある。
Furthermore, in the bonding work for fixing the light emitting diode array elements to the substrate, the work of adjoining each element as described above is very troublesome and difficult for the following reasons. That is, when one element is being bonded, it comes into contact with the already arranged elements,
This may disturb the arrangement, damage the element surface, or stain the element surface with preform material.

(発明が解決しようとする問題点) 本発明は、このような事情に鑑みてなされたものであっ
て、高いダイシング精度を必要とせず、また、グイボン
ディング作業が比較的容易に行うことができる光プリン
タを提供することを目的とする。
(Problems to be Solved by the Invention) The present invention has been made in view of the above circumstances, and does not require high dicing accuracy and can perform the Gui bonding work relatively easily. The purpose is to provide an optical printer.

(問題点を解決するための手段) 本発明は、このような目的を達成するために、次のよう
な特徴を備えている。
(Means for Solving the Problems) In order to achieve the above object, the present invention has the following features.

即ち、本発明は、複数個の発光ダイオード・アレイ素子
と、感光体との間に集束性ロッドレンズを介在させ、前
記発光ダイオード・アレイ素子の表面からこの集束性ロ
ッドレンズの入射端面までの距離L1と、集束性ロッド
レンズの出射端面から感光体の表面までの距離L2との
関係が、L2>Llであって、感光体表面に結像される
発光ド、ソトが一定間隔になるように設定している。
That is, in the present invention, a focusing rod lens is interposed between a plurality of light emitting diode array elements and a photoreceptor, and the distance from the surface of the light emitting diode array element to the incident end surface of the focusing rod lens is The relationship between L1 and the distance L2 from the output end face of the focusing rod lens to the surface of the photoconductor is such that L2>Ll, and the light emission dots and dots focused on the photoconductor surface are spaced at a constant interval. It is set.

(実施例) 以下、本発明を図面に示す実施例に基づいて詳細に説明
する。第1図は、本発明の実施例に係る光プリンタの構
成の概略を示した説明図である。
(Example) Hereinafter, the present invention will be described in detail based on an example shown in the drawings. FIG. 1 is an explanatory diagram showing an outline of the configuration of an optical printer according to an embodiment of the present invention.

同図において、発光ダイオード・アレイ素子11a〜l
idには、例えば細長いGaAsP基板上に64個また
は128個の発光ドツトが一定間隔で一列に配列されて
いる。このような所定個数(例えば、16個)の発光ダ
イオード・アレイ素子が、基板12上に、長手方向に沿
って一定間隔をへだてて一列に固着されている。各素子
間隔は、後述する集束性ロッドレンズの倍率などとの関
係で適宜に設定されるが、各素子間隔は一定値になって
いる。
In the same figure, light emitting diode array elements 11a-l
In the id, for example, 64 or 128 light emitting dots are arranged in a line at regular intervals on a long and narrow GaAsP substrate. A predetermined number (for example, 16) of such light emitting diode array elements are fixed in a line on the substrate 12 at regular intervals along the longitudinal direction. The distance between each element is appropriately set in relation to the magnification of the focusing rod lens, which will be described later, but the distance between each element is a constant value.

これらの発光ダイオード・アレイ素子と一定距離を隔て
て、感光ドラム13が前記素子配列と平行に配置されて
いる。
A photosensitive drum 13 is arranged parallel to the array of light emitting diode array elements at a certain distance from them.

そして、前記発光ダイオード・アレイ素子11a−11
dと感光ドラム13との間に、集束性ロッドレンズ14
a〜14dが設けられている。この集束性ロッドレンズ
には、例えばセルフォックマイクロレンズ(日本板硝子
株式会社の商標)が使用される。これらの集束性ロッド
レンズ14a″−14dは、前記各発光ダイオード・ア
レイ素子11a〜lidに対向して設けられ、各レンズ
の中心間隔は各発光ダイオード・アレイ素子の中心ピッ
チと同一になっている。これらの集束性ロッドレンズは
、相互の間隙に黒色のシリコン樹脂15が充填されて一
体になっている。
And the light emitting diode array element 11a-11
d and the photosensitive drum 13, a focusing rod lens 14 is provided.
a to 14d are provided. For example, a SELFOC microlens (trademark of Nippon Sheet Glass Co., Ltd.) is used as the focusing rod lens. These focusing rod lenses 14a''-14d are provided facing each of the light emitting diode array elements 11a to lid, and the center distance between each lens is the same as the center pitch of each light emitting diode array element. These focusing rod lenses are integrally formed by filling the gaps between them with black silicone resin 15.

ここで、発光ダイオード・アレイ素子の表面からこの集
束性ロッドレンズの入射端面までの距離(作動距離)を
LL、集束性ロッドレンズの出射端面から感光ドラムの
表面までの距離をL2とする。
Here, the distance (working distance) from the surface of the light emitting diode array element to the incident end surface of this focusing rod lens is assumed to be LL, and the distance from the output end surface of the focusing rod lens to the surface of the photosensitive drum is assumed to be L2.

各集束性ロッドレンズは、前記距離の関係がL2>Ll
になるように配置される。集束性ロッドレンズがこのよ
うに配置されることにより、1倍以上の倍率で発光ダイ
オード・アレイ素子の発光ドツトが感光ドラム表面に結
像される。次に集束性ロッドレンズによって所望の拡大
像を得るために前記距離関係がどのように設定されるか
を具体的に説明しよう。
Each focusing rod lens has the distance relationship L2>Ll
are arranged so that By arranging the focusing rod lens in this manner, the light emitting dots of the light emitting diode array element are imaged on the surface of the photosensitive drum at a magnification of 1 times or more. Next, we will specifically explain how the distance relationship is set in order to obtain a desired enlarged image using the converging rod lens.

第2図は集束性ロッドレンズの作動距離L1と、倍率お
よび共役長との関係図である。ここで共役長とは、発光
ダイオード・アレイ素子表面から感光ドラムまでの距離
をいう。なお、同図において、Jτは屈折率分布定数、
nOは光軸上の屈折率、”Pはレンズ内の光線の蛇行周
期をそれぞれ表している。いま、素子間隔などとの関係
で集束性ロッドレンズの倍率を1.4に設定したいとす
る。そうすると、同図より作動距離L1は5+niで、
このときの共役長は19mmになる。従って、集束性ロ
ッドレンズの長さが711II11であれば、集束性ロ
ッドレンズの出射端面から感光ドラムの表面までの距M
L2は、71に設定すればよいことになる。
FIG. 2 is a diagram showing the relationship between the working distance L1, magnification, and conjugate length of the focusing rod lens. Here, the conjugate length refers to the distance from the surface of the light emitting diode array element to the photosensitive drum. In addition, in the same figure, Jτ is the refractive index distribution constant,
nO represents the refractive index on the optical axis, and P represents the meandering period of the light ray within the lens. Now, suppose that we want to set the magnification of the focusing rod lens to 1.4 in relation to the element spacing. Then, from the same figure, the working distance L1 is 5+ni,
The conjugate length at this time is 19 mm. Therefore, if the length of the focusing rod lens is 711II11, the distance M from the output end face of the focusing rod lens to the surface of the photosensitive drum
L2 may be set to 71.

このように、前記距離L1、L2をL2>Llの範囲で
、適宜に設定することにより、所望の倍率でもって感光
ドラム13に結像される発光ドツトを一定間隔にするこ
とができる。
In this way, by appropriately setting the distances L1 and L2 within the range of L2>L1, the light emitting dots that are imaged on the photosensitive drum 13 at a desired magnification can be spaced at regular intervals.

なお、本発明の感光体には、ベルト状の感光体を使用す
ることもできる。
Note that a belt-shaped photoreceptor can also be used as the photoreceptor of the present invention.

(発明の効果) 以上のように、本発明に係る光プリンタは、集束性ロッ
ドレンズを各発光ダイオード・アレイ素子と感光体間に
設け、かつ、前記発光ダイオード・アレイ素子の表面か
らこの集束性ロッドレンズの入射端面までの距離Llと
、集束性ロッドレンズの出射端面から感光体の表面まで
の距離L2との関係が、L2>Llであって、感光体表
面に結像される発光ドツトが一定間隔になるように設定
したから、発光ダイオード・アレイ素子は基板上に離隔
して配置するこができる。
(Effects of the Invention) As described above, the optical printer according to the present invention is provided with a focusing rod lens between each light emitting diode array element and the photoreceptor, and the focusing rod lens is provided from the surface of the light emitting diode array element. The relationship between the distance Ll to the incident end surface of the rod lens and the distance L2 from the output end surface of the focusing rod lens to the surface of the photoreceptor is L2>Ll, and the light emitting dots imaged on the surface of the photoreceptor are Since the spacing is constant, the light emitting diode array elements can be spaced apart on the substrate.

従って、本発明によれば、集束性ロッドレンズを通じて
各発光ダイオード・アレイ素子の発光ドツトを感光体上
に一定ピッチで結像させるので、各発光ダイオード・ア
レイ素子間を開けて配置でき、これにより、ダイシング
精度を特に高くする必要がなく、また、グイボンディン
グ作業を容易に行うことができる。
Therefore, according to the present invention, since the light emitting dots of each light emitting diode array element are imaged at a constant pitch on the photoreceptor through the focusing rod lens, it is possible to arrange the light emitting diode array elements with spaces between them. , it is not necessary to particularly increase the dicing accuracy, and the bonding work can be easily performed.

【図面の簡単な説明】[Brief explanation of drawings]

第1図は本発明の実施例に係る光プリンタの概略の構成
を示した説明図、第2図は集束性ロッドレンズで拡大像
を得るための説明図、第3図は従来の光プリンタの説明
図である。
Fig. 1 is an explanatory diagram showing the general configuration of an optical printer according to an embodiment of the present invention, Fig. 2 is an explanatory diagram showing how to obtain an enlarged image using a converging rod lens, and Fig. 3 is an explanatory diagram of a conventional optical printer. It is an explanatory diagram.

Claims (1)

【特許請求の範囲】[Claims] (1)複数個の発光ダイオード・アレイ素子と、感光体
と、前記発光ダイオード・アレイ素子と前記感光体との
間に介挿された集束性ロッドレンズとを備え、 前記発光ダイオード・アレイ素子の表面からこの集束性
ロッドレンズの入射端面までの距離L1と、集束性ロッ
ドレンズの出射端面から感光体の表面までの距離L2と
の関係が、L2>L1であって、感光体表面に結像され
る発光ドットが一定間隔になるように設定されるもので
あることを特徴とする光プリンタ。
(1) comprising a plurality of light emitting diode array elements, a photoreceptor, and a focusing rod lens interposed between the light emitting diode array elements and the photoreceptor; The relationship between the distance L1 from the surface to the incident end face of the focusing rod lens and the distance L2 from the output end face of the focusing rod lens to the surface of the photoreceptor is L2>L1, and an image is formed on the surface of the photoreceptor. An optical printer characterized in that the luminescent dots are set at regular intervals.
JP60203096A 1985-09-12 1985-09-12 Optical printer Pending JPS6262322A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP60203096A JPS6262322A (en) 1985-09-12 1985-09-12 Optical printer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP60203096A JPS6262322A (en) 1985-09-12 1985-09-12 Optical printer

Publications (1)

Publication Number Publication Date
JPS6262322A true JPS6262322A (en) 1987-03-19

Family

ID=16468309

Family Applications (1)

Application Number Title Priority Date Filing Date
JP60203096A Pending JPS6262322A (en) 1985-09-12 1985-09-12 Optical printer

Country Status (1)

Country Link
JP (1) JPS6262322A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH024546A (en) * 1988-06-21 1990-01-09 Rohm Co Ltd Optical information writer, optical information detector and structure of optical lens system thereof
JPH02273257A (en) * 1989-04-14 1990-11-07 Rohm Co Ltd Led printing head and optical information detecting device
US5023442A (en) * 1988-06-21 1991-06-11 Rohm Co., Ltd. Apparatus for optically writing information
JP2008062467A (en) * 2006-09-06 2008-03-21 Seiko Epson Corp Line head and image forming apparatus using the line head
JP2008074003A (en) * 2006-09-22 2008-04-03 Seiko Epson Corp Line head and image forming apparatus using the line head

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59127017A (en) * 1983-01-12 1984-07-21 Olympus Optical Co Ltd Optical scanner

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59127017A (en) * 1983-01-12 1984-07-21 Olympus Optical Co Ltd Optical scanner

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH024546A (en) * 1988-06-21 1990-01-09 Rohm Co Ltd Optical information writer, optical information detector and structure of optical lens system thereof
US5023442A (en) * 1988-06-21 1991-06-11 Rohm Co., Ltd. Apparatus for optically writing information
JPH02273257A (en) * 1989-04-14 1990-11-07 Rohm Co Ltd Led printing head and optical information detecting device
JP2008062467A (en) * 2006-09-06 2008-03-21 Seiko Epson Corp Line head and image forming apparatus using the line head
JP2008074003A (en) * 2006-09-22 2008-04-03 Seiko Epson Corp Line head and image forming apparatus using the line head

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