JPH0246417A - Information recorder - Google Patents

Information recorder

Info

Publication number
JPH0246417A
JPH0246417A JP63198281A JP19828188A JPH0246417A JP H0246417 A JPH0246417 A JP H0246417A JP 63198281 A JP63198281 A JP 63198281A JP 19828188 A JP19828188 A JP 19828188A JP H0246417 A JPH0246417 A JP H0246417A
Authority
JP
Japan
Prior art keywords
lens
scanning
luminous flux
light beam
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.)
Granted
Application number
JP63198281A
Other languages
Japanese (ja)
Other versions
JP2728889B2 (en
Inventor
Yoshiaki Watanabe
吉章 渡辺
Hiroyuki Isobe
裕順 磯部
Takeshi Matoba
健 的場
Toru Kameyama
徹 亀山
Jun Azuma
吾妻 純
Shinro Umezawa
梅沢 眞郎
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.)
Canon Inc
Original Assignee
Canon Inc
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 Canon Inc filed Critical Canon Inc
Priority to JP63198281A priority Critical patent/JP2728889B2/en
Publication of JPH0246417A publication Critical patent/JPH0246417A/en
Application granted granted Critical
Publication of JP2728889B2 publication Critical patent/JP2728889B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Abstract

PURPOSE:To miniaturize an auxiliary lens and to increase the degree of freedom of a mounting flange by forming the effective part of the auxiliary lens of a part for generating a luminous flux modulation start signal to the size large in the direction perpendicular to the scanning direction of the luminous flux. CONSTITUTION:The luminous flux past a scanning lens 4 is reflected by a mirror 6 and is made to enter an optical fiber 8a. The signal of the luminous flux modulation start signal is generated by a sensitive element 8 and is transmitted to a driving circuit 14. The effective part of the auxiliary lens 16 used in a photodetecting part is formed to the size larger in the direction perpendicular to the scanning direction than in the scanning direction of the luminous flux. The peripheral part of the lens 16 is formed to such a shape at which the effective part of the lens can be mounted to the normal position. The lens 16 is, therefore, made into the smaller size and since the lens is not a spherical lens, the degree of freedom is given to the shape of the mounting flange.

Description

【発明の詳細な説明】 [技術分野] 本発明はコンピュータ、原稿読取り装置、ワードプロセ
ッサ等からの被記録情報信号を用いて変調された光束を
形成し、この光束で感光体を走査することにより情報を
記録する装置に関する。
Detailed Description of the Invention [Technical Field] The present invention forms a modulated light beam using a recorded information signal from a computer, an original reading device, a word processor, etc., and scans a photoreceptor with this light beam to obtain information. The present invention relates to a device for recording.

[従来技術と問題点] 前記情報記録装置の従来例を第4図をかりて説明する。[Prior art and problems] A conventional example of the information recording device will be explained with reference to FIG.

第4図に於いて半導体レーザ1から発せられた光束はコ
リメータレンズ2aを通過して平行光束となり、走査手
段としてのポリゴンミラー3によって反射される。ポリ
ゴンミラー3は不図示の千−夕により矢印方向に一定速
度で回転する。ポリゴンミラー3の回転にともなって反
射光束は走査され、走査レンズとしてfθレレン4を通
って電子写真感光体ドラム5上へ結像され、矢印5aの
方向へ走査される。そして、ドラム5上へは、後述の手
段により、5bの点から被記録情報に対応して変調され
た光束の露光が開始される。
In FIG. 4, the light beam emitted from the semiconductor laser 1 passes through a collimator lens 2a, becomes a parallel light beam, and is reflected by a polygon mirror 3 as a scanning means. The polygon mirror 3 is rotated at a constant speed in the direction of the arrow by an unillustrated roller. As the polygon mirror 3 rotates, the reflected light beam is scanned, passes through an fθ lens 4 as a scanning lens, forms an image on the electrophotographic photosensitive drum 5, and is scanned in the direction of the arrow 5a. Then, exposure of the drum 5 with a light beam modulated in accordance with the information to be recorded is started from point 5b by means described later.

つまりこの光束により感光体ドラム5の画像形成領域が
走査される。尚、2b、2cはポリゴンミラー3の前後
に配置されたシリンドリカルレンズでポリゴンミラー3
の回転軸が傾いても、ドラム5上での光束の走査軌跡は
一定とする倒れ補正光学系を構成する。
In other words, the image forming area of the photoreceptor drum 5 is scanned by this light beam. Note that 2b and 2c are cylindrical lenses placed before and after the polygon mirror 3.
A tilt correction optical system is constructed in which the scanning locus of the light beam on the drum 5 remains constant even if the rotation axis of the drum 5 is tilted.

ポリゴンミラー3により走査され、レンズ4を通過した
光束が、上記ドラム露光開始点5bに到達する前に、光
束はミラー6によって反射され、矢印6a方向に移動す
る。而してこの光束はマスク7のスリット及び集光性を
有する補助レンズ15を介して光学ファイバー88の入
射端面8bを走査する。光束か入射端面8bに入射する
と、その光は光学ファイバー88により伝送され、PI
MフォトダイオードやCdSのような光感応素子8によ
り信号が形成される。その信号は増幅器9によりて増幅
され、この増幅された信号が所定レベルまで立ち上がっ
た時点を検出器10で検出する。而してタイマ11かこ
の時点から所定時間後にメモリ12を作動させて、メモ
リ12内に被記録情報信号を駆動回路14に伝達させる
。(メモリ12には、コンピュータ、原稿読取装置、ワ
ードプロセッサ等の信号源13から、予め被記録情報信
号か付与され、記憶されている。)そして駆動回路14
は、前記被記録情報信号に応じて半導体レーザー1を駆
動し、かくして半導体レーサー1はこの信号に対応して
点滅変調されたレーザー光束を射出する。
Before the light beam scanned by the polygon mirror 3 and passed through the lens 4 reaches the drum exposure start point 5b, it is reflected by the mirror 6 and moves in the direction of the arrow 6a. This light flux then scans the incident end surface 8b of the optical fiber 88 via the slit of the mask 7 and the auxiliary lens 15 having a light-condensing property. When the light beam is incident on the incident end face 8b, the light is transmitted by the optical fiber 88 and the PI
A signal is formed by a photosensitive element 8, such as an M photodiode or CdS. The signal is amplified by an amplifier 9, and a detector 10 detects the point in time when this amplified signal rises to a predetermined level. Then, the timer 11 operates the memory 12 after a predetermined period of time from this point, and causes the recorded information signal in the memory 12 to be transmitted to the drive circuit 14. (The memory 12 is provided with a recorded information signal in advance from a signal source 13 such as a computer, an original reading device, a word processor, etc., and is stored therein.)
drives the semiconductor laser 1 in accordance with the recorded information signal, and thus the semiconductor laser 1 emits a blinking modulated laser beam in response to this signal.

しかしながら上記従来例では補助レンズが円形であった
ため以下のような欠点がある。
However, in the conventional example described above, since the auxiliary lens is circular, there are the following drawbacks.

(1)マスク通過後の光束の14]に比へて補助レンズ
が必要以上に大きなものになってしまう。
(1) The auxiliary lens becomes larger than necessary compared to 14] of the light beam after passing through the mask.

(2)補助レンズが円形のためレンズ固定のためのボル
ダ−が異形状になりやすい。つまり、ホルダーの作成か
困難になりがちである。
(2) Since the auxiliary lens is circular, the boulder for fixing the lens tends to have an irregular shape. In other words, creating a holder tends to be difficult.

(3)円形レンズはプラスデックレンズがよく使用され
ているか、プラスチックレンズの場合ゲート跡が残り、
これを円形状に処理するのは困難である。
(3) For circular lenses, plus deck lenses are often used, or in the case of plastic lenses, gate marks may remain.
It is difficult to process this into a circular shape.

(4)今後の近代化に伴い、自動加工機による作成が考
えられるが、円形状では自動加工機のワークハンドでホ
ールトするには困難である。
(4) With future modernization, it is conceivable to use an automatic processing machine to create the workpiece, but a circular shape would be difficult to hold with the work hand of an automatic processing machine.

(5)(3)で示したゲート処理不良のまま組立てを行
なうとレンズ中心と光軸中心とが同じにならず検出エラ
ーが起こるおそれがある。
(5) If assembly is performed with the defective gate processing shown in (3), the center of the lens will not be the same as the center of the optical axis, which may cause a detection error.

[発明の概要] 本発明の目的は、上記従来装置の欠点を解消し、光束変
調開始信号を得る為の補助レンズの小型化が可能で、ま
た該補助レンズの取付フランジの形状に自由度がもたせ
られる情報記録装置を提供することにある。
[Summary of the Invention] An object of the present invention is to eliminate the drawbacks of the conventional device described above, to make it possible to miniaturize the auxiliary lens for obtaining a light flux modulation start signal, and to provide flexibility in the shape of the mounting flange of the auxiliary lens. The object of the present invention is to provide an information recording device that can be used as an information storage device.

本発明の上記目的は、光束を走査する走査手段と、この
走査手段によって走査された光束を感光体上に結像する
走査レンズと、上記走査手段で走査され、上記走査レン
ズを通過した光束を、上記感光体の画像形成領域が走査
開始される前に受光する受光面を持りた受光手段と、こ
の受光手段の形成した信号に応答して被記録情報信号に
対応した光束変調を開始する制御手段と、上記受光手段
の受光面の近傍に、上記走査レンズからの光束をこの受
光面上に指向させる補助レンズと、を備えた情報記録装
置において、上記補助レンズの有効部を、光束の走査方
向よりも光束の走査方向に垂直な方向が大きくすること
によって達成される。
The above objects of the present invention include a scanning means for scanning a light beam, a scanning lens for forming an image of the light beam scanned by the scanning means on a photoreceptor, and a scanning means for scanning a light beam scanned by the scanning means and passing through the scanning lens. , a light-receiving means having a light-receiving surface that receives light before the image forming area of the photoreceptor starts scanning; and a light-receiving means that starts light flux modulation corresponding to the recorded information signal in response to a signal formed by the light-receiving means. An information recording device comprising: a control means; and an auxiliary lens that directs a light beam from the scanning lens onto the light-receiving surface near the light-receiving surface of the light-receiving means; This is achieved by making the direction perpendicular to the scanning direction of the light beam larger than the scanning direction.

[実施例] 第1図は本発明の実施例を示す概略図である。[Example] FIG. 1 is a schematic diagram showing an embodiment of the present invention.

図中、第4図と同一の部材には共通の符号を附した。第
1図において、16はファイバー入射端面8bの近傍に
配置された集光性を有する補助レンズである。このレン
ズ16は、第2図に示すように、レンズとしての有効部
が光束の走査方向に対して垂直に切断されている。つま
り、補助レンズは、光束の走査方向よりも光束の走査方
向に垂直な方向が大きく構成されている。また、レンズ
の周辺部はレンズ有効部が正規位置に取り付けられるよ
うにホールトできるような形状になっている。17はレ
ンズ16を位置決め固定する凹部を有する光学箱である
In the figure, the same members as in FIG. 4 are given the same reference numerals. In FIG. 1, reference numeral 16 denotes an auxiliary lens having a light condensing property, which is arranged near the fiber input end face 8b. As shown in FIG. 2, this lens 16 has an effective portion cut perpendicularly to the scanning direction of the light beam. In other words, the auxiliary lens is configured to be larger in the direction perpendicular to the scanning direction of the luminous flux than in the scanning direction of the luminous flux. Further, the peripheral portion of the lens is shaped such that it can be held so that the effective lens portion can be attached to a normal position. Reference numeral 17 denotes an optical box having a recess for positioning and fixing the lens 16.

以上のような補助レンズを用いることにより、(1)必
要な部分のみをレンズ形状にするため、レンズを小さく
することかできる。
By using the above-mentioned auxiliary lens, (1) the lens can be made smaller because only the necessary portion is shaped like a lens;

(2)ゲート位置を位置決め基準位置に影響しない場所
に設けられる。
(2) The gate position is provided at a location that does not affect the positioning reference position.

(3)レンズの取り付はフランジの形状に自由度がもた
せられる。
(3) The lens can be mounted with flexibility in the shape of the flange.

等の効果を有するものである。It has the following effects.

尚、補助レンズ16は、第1図のミラー6の光束反射点
の像をファイバー8aの入射端面8bの中心近傍に結像
するように、換言すればミラー6の光束反射点と上記入
射′端面8bの中心近傍を光学的共役関係におくように
、配置されていることが望ましい。このようにすればミ
ラー6の向きがかなり変化しても、光束をファイバー入
射端面8b上の非常に狭い幅内に入射させることができ
るからで、前記開始信号形成の確度をより一層向上でき
るからである。しかしこのことは絶対必要なことではな
く、光束軌跡の正規軌跡からの変位量に許容範囲を設定
し、その許容範囲内の軌跡を移動する光束がファイバー
入射端面の所要領域内に指向するように偏向すれば足り
る。
The auxiliary lens 16 is designed to form an image of the light beam reflection point of the mirror 6 shown in FIG. 1 near the center of the incident end surface 8b of the fiber 8a. It is desirable that the arrangement is such that the vicinity of the center of 8b is in an optical conjugate relationship. In this way, even if the direction of the mirror 6 changes considerably, the light beam can be made to enter within a very narrow width on the fiber input end face 8b, and the accuracy of forming the start signal can be further improved. It is. However, this is not absolutely necessary; instead, a permissible range is set for the amount of deviation of the light flux trajectory from the normal trajectory, and the light flux moving along the trajectory within that permissible range is directed within the required area of the fiber input end face. It is enough to deflect.

次に、他の実施例を第3図に示す。これは、ファイバー
に指向する補助レンズ23と、位置決めを行なわせる凸
凹部を持つ光学箱24と、レンズを固定する押さえバネ
25から成っている。補助レンズ作成時に要する押しビ
ン22とゲート21の位置はレンズ有効面より離れた位
置に設けられレンズ精度を良くしている。この実施例は
レンズ有効面の切断面を前記開始信号の立ち上がり面と
しているので、第1図のスリット7を省略することがで
きる。これにより部品数を減らすことができ、コストダ
ウンすることができる。
Next, another embodiment is shown in FIG. This consists of an auxiliary lens 23 pointing toward the fiber, an optical box 24 having concave and convex portions for positioning, and a presser spring 25 for fixing the lens. The positions of the pusher bottle 22 and gate 21 required for producing the auxiliary lens are located away from the lens effective surface to improve lens precision. In this embodiment, since the cut plane of the lens effective surface is used as the rising plane of the start signal, the slit 7 in FIG. 1 can be omitted. This allows the number of parts to be reduced and costs to be reduced.

[発明の効果] 以上説明したように、光束変調開始タイミングを決定す
る為の信号を形成する受光手段の受光面近傍に、光束の
走査方向よりも光束の走査方向に垂直な方向が大ぎい有
効部を有する補助レンズを用いることにより、 (1)必要な部分のみをレンズ形状にするため、レンズ
を小さくすることができる。
[Effects of the Invention] As explained above, the direction perpendicular to the scanning direction of the luminous flux is more effective than the scanning direction of the luminous flux in the vicinity of the light receiving surface of the light receiving means that forms the signal for determining the timing to start modulating the luminous flux. By using an auxiliary lens having a part, (1) Only the necessary part is shaped into a lens, so the lens can be made smaller.

(2)ゲート位置を位置決め基準位置に影響しない場所
に設けられる。
(2) The gate position is provided at a location that does not affect the positioning reference position.

(3)レンズの取り付はフランジの形状に自由度がもた
せられる。
(3) The lens can be mounted with flexibility in the shape of the flange.

(4)レンズ作成時の押しピンやゲート位置をレンズ作
成を容易にするための位置に取り付けることができる。
(4) Push pins and gates can be attached to positions that facilitate lens creation.

等、の効果を有するものである。It has the following effects.

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

第1図は本発明の詳細な説明図、第2図及び第3図はフ
ァイバー指向補助レンズを示す概略図、第4図は従来例
の説明図である。 1−m−半導体レーザー 3−m−ポリゴンミラー 4−m−走査レンズ 5−m−感光ドラム 6−−−ミラー 8−m−光感応素子 16−−補助レンズ
FIG. 1 is a detailed explanatory diagram of the present invention, FIGS. 2 and 3 are schematic diagrams showing a fiber-directing auxiliary lens, and FIG. 4 is an explanatory diagram of a conventional example. 1-m-semiconductor laser 3-m-polygon mirror 4-m-scanning lens 5-m-photosensitive drum 6--mirror 8-m-photosensitive element 16--auxiliary lens

Claims (1)

【特許請求の範囲】[Claims] (1)光束を走査する走査手段と、この走査手段によっ
て走査された光束を感光体上に結像する走査レンズと、
上記走査手段で走査され、上記走査レンズを通過した光
束を、上記感光体の画像形成領域が走査開始される前に
受光する受光面を持った受光手段と、この受光手段の形
成した信号に応答して被記録情報信号に対応した光束変
調を開始する制御手段と、上記受光手段の受光面の近傍
に、上記走査レンズからの光束をこの受光面上に指向さ
せる補助レンズと、を備えた情報記録装置において、 上記補助レンズの有効部は、光束の走査方向よりも光束
の走査方向に垂直な方向が大きいことを特徴とする情報
記録装置。
(1) a scanning means for scanning a light beam; a scanning lens for forming an image of the light beam scanned by the scanning means on a photoreceptor;
a light receiving means having a light receiving surface that receives the light beam scanned by the scanning means and passing through the scanning lens before the image forming area of the photoreceptor starts scanning; and a light receiving means that responds to a signal formed by the light receiving means. and an auxiliary lens for directing the light beam from the scanning lens onto the light receiving surface near the light receiving surface of the light receiving means. An information recording device, wherein the effective portion of the auxiliary lens is larger in the direction perpendicular to the scanning direction of the luminous flux than in the scanning direction of the luminous flux.
JP63198281A 1988-08-08 1988-08-08 Information recording device Expired - Lifetime JP2728889B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP63198281A JP2728889B2 (en) 1988-08-08 1988-08-08 Information recording device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP63198281A JP2728889B2 (en) 1988-08-08 1988-08-08 Information recording device

Publications (2)

Publication Number Publication Date
JPH0246417A true JPH0246417A (en) 1990-02-15
JP2728889B2 JP2728889B2 (en) 1998-03-18

Family

ID=16388518

Family Applications (1)

Application Number Title Priority Date Filing Date
JP63198281A Expired - Lifetime JP2728889B2 (en) 1988-08-08 1988-08-08 Information recording device

Country Status (1)

Country Link
JP (1) JP2728889B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0385510A (en) * 1989-08-30 1991-04-10 Ricoh Co Ltd Synchronization detector for optical scanner

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61172113A (en) * 1985-01-25 1986-08-02 Ricoh Co Ltd Synchronous light detector

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61172113A (en) * 1985-01-25 1986-08-02 Ricoh Co Ltd Synchronous light detector

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0385510A (en) * 1989-08-30 1991-04-10 Ricoh Co Ltd Synchronization detector for optical scanner

Also Published As

Publication number Publication date
JP2728889B2 (en) 1998-03-18

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