JPH01163079A - Imaging optical device - Google Patents
Imaging optical deviceInfo
- Publication number
- JPH01163079A JPH01163079A JP32348587A JP32348587A JPH01163079A JP H01163079 A JPH01163079 A JP H01163079A JP 32348587 A JP32348587 A JP 32348587A JP 32348587 A JP32348587 A JP 32348587A JP H01163079 A JPH01163079 A JP H01163079A
- Authority
- JP
- Japan
- Prior art keywords
- light source
- light
- array
- lens
- plate
- 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 title claims description 10
- 238000003384 imaging method Methods 0.000 title claims description 9
- 230000005540 biological transmission Effects 0.000 claims 4
- 230000004907 flux Effects 0.000 claims 2
- 210000001747 pupil Anatomy 0.000 claims 1
- 239000011159 matrix material Substances 0.000 abstract description 8
- 239000011521 glass Substances 0.000 abstract description 2
- 238000000034 method Methods 0.000 abstract description 2
- 239000000126 substance Substances 0.000 abstract description 2
- 238000003491 array Methods 0.000 abstract 2
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 239000004973 liquid crystal related substance Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 241000723353 Chrysanthemum Species 0.000 description 1
- 235000005633 Chrysanthemum balsamita Nutrition 0.000 description 1
- 206010034972 Photosensitivity reaction Diseases 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000036211 photosensitivity Effects 0.000 description 1
- 208000017983 photosensitivity disease Diseases 0.000 description 1
- 231100000434 photosensitization Toxicity 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/435—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of radiation to a printing material or impression-transfer material
- B41J2/447—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of radiation to a printing material or impression-transfer material using arrays of radiation sources
- B41J2/45—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of radiation to a printing material or impression-transfer material using arrays of radiation sources using light-emitting diode [LED] or laser arrays
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K15/00—Arrangements for producing a permanent visual presentation of the output data, e.g. computer output printers
- G06K15/02—Arrangements for producing a permanent visual presentation of the output data, e.g. computer output printers using printers
- G06K15/12—Arrangements for producing a permanent visual presentation of the output data, e.g. computer output printers using printers by photographic printing, e.g. by laser printers
- G06K15/1238—Arrangements for producing a permanent visual presentation of the output data, e.g. computer output printers using printers by photographic printing, e.g. by laser printers simultaneously exposing more than one point
- G06K15/1242—Arrangements for producing a permanent visual presentation of the output data, e.g. computer output printers using printers by photographic printing, e.g. by laser printers simultaneously exposing more than one point on one main scanning line
- G06K15/1247—Arrangements for producing a permanent visual presentation of the output data, e.g. computer output printers using printers by photographic printing, e.g. by laser printers simultaneously exposing more than one point on one main scanning line using an array of light sources, e.g. a linear array
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Dot-Matrix Printers And Others (AREA)
- Printers Or Recording Devices Using Electromagnetic And Radiation Means (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野コ
本発明は結像光学装置、特に空間的に多数個配列した文
字、数字等のパターンを切換えて、同一・の像位置に結
像する事を目的とした結像光学装置に関するものである
。[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to an imaging optical device, and particularly to an imaging optical device that changes patterns of letters, numbers, etc. arranged in a large number of spaces and forms images at the same image position. The present invention relates to an imaging optical device for the purpose of.
［従来の技術］
従来より、プリンタやタイプライタ等の印字装置には、
サーマルプリンタやドツトマトリクスプリンタ等、マト
リクス状に配列した印字点の集まりとして文字を表わす
タイプ（ドツトマトリクスタイプと呼ぶ）と、デイジ−
ホイールプリンタ等、活字として１文字ずつ用意された
文字パターンを印字するタイプ（デイジ−ホイールタイ
プと呼ぶ）がある。ドツトマトリクスタイプは、文字を
決まったピッチで配列した点列で表わすため、印字され
た文字を拡大すると、斜めの線が階段状に見えてしまう
等、の問題がある。[Conventional technology] Conventionally, printing devices such as printers and typewriters have
There are two types, such as thermal printers and dot matrix printers, which express characters as a collection of print points arranged in a matrix (called dot matrix type), and daisy printers.
There is a type such as a wheel printer (referred to as a daisy-wheel type) that prints character patterns prepared one character at a time. In the dot matrix type, characters are represented by a series of dots arranged at a fixed pitch, so when the printed characters are enlarged, there are problems such as diagonal lines appearing like steps.
デイジ−ホイールタイプは、１文字１文字が活字として
用意されているため、ドントマトリクスタイプで示した
上記問題は生じないが、通常のデイジ−ホイールタイプ
のプリンタは、機械的にインクリボンをたたいて紙に印
字するため、印字時の騒音が問題になる。Daisy-wheel type printers do not have the above-mentioned problems with donmatrix type printers because each character is prepared as a type, but normal daisy-wheel type printers do not mechanically strike the ink ribbon. Because the printer prints on paper, noise during printing becomes a problem.
また、近年レーザープリンタ、ＬＥＤプリンタ、液晶プ
リンタ等の開発が行なわれ、レーザープリンタではスキ
ャンビームの０Ｎ１０ＦＦ間隔を細かくする事により、
ＬＥＤプリンタ、液晶プリンタではＬＥＤアレイ、液晶
シャッタアレイのピンチを細かくする事により、基本的
にはドツトマトリクスタイプでありながら、１文字に対
応するドツトの数を増やし、高精細な文字を印字させる
アプローチがある。しかしこれらのプリンタでは、高精
度な光学系が必要であったり、ＬＥＤアレイ液晶シャッ
タアレイの作製歩留りが低い等、作製面、価格面で不利
な点が多い。In addition, in recent years, laser printers, LED printers, liquid crystal printers, etc. have been developed.
Although LED printers and LCD printers are basically dot matrix type printers, by fine-tuning the LED array and LCD shutter array, this approach increases the number of dots that correspond to one character and prints high-definition characters. There is. However, these printers have many disadvantages in terms of manufacturing and cost, such as the need for a highly accurate optical system and the low manufacturing yield of the LED array and liquid crystal shutter array.
このような従来のプリンタ、タイプライタ等に係る問題
点を除去するために、レンズアレイと投影レンズを組合
せた例えば特願昭６２−２６７８４３のような構成が考
えられる。特願昭６２−２８７８４３に記載されている
一実施例を第３図に示す。これは、ＬＥＤアレイ１の中
の特定のＬＥＤを点灯する事によって、文字パターンア
レイ２のこれに対応した文字を照明し、この像を微小レ
ンズアレイ３のこれに対応した微小レンスト、投影レン
ズ４で感光面５上に結像するものである。In order to eliminate such problems associated with conventional printers, typewriters, etc., a structure such as that disclosed in Japanese Patent Application No. 62-267843, for example, can be considered in which a lens array and a projection lens are combined. An embodiment described in Japanese Patent Application No. 62-287843 is shown in FIG. By lighting a specific LED in the LED array 1, the corresponding character in the character pattern array 2 is illuminated, and this image is transmitted to the corresponding microlens of the microlens array 3 and the projection lens 4. An image is formed on the photosensitive surface 5.
このような構成によって、従来のデイジ−ホイール、タ
イプに匹敵する高品位な印字を低い騒音で筒中な構成で
実現可能である。With this configuration, it is possible to achieve high-quality printing comparable to conventional daisy-wheel types with low noise and an in-cylinder configuration.
［発明が解決しようとする問題点］
しかしながら、第３図の構成では、周辺部にある微小レ
ンズによる結像における主光線が、投影レンズ４の光軸
に対して傾いているため、感光面５を光軸に垂直に置く
と、光束が感光面に傾いて当る事になる。一般に、ある
面を照明する場合、その面の照度は光線の傾き角のｃｏ
ｓｉｎｅに従って減少するため、各光源の発光強度が一
定である場合、投影レンズ４の光軸の近傍にある微小レ
ンズによる像と、離れた位置にある微小レンズによる像
との単位面積あたりの明るさが等しくなく、感光の条件
が不均一になるという問題がある。[Problems to be Solved by the Invention] However, in the configuration shown in FIG. If it is placed perpendicular to the optical axis, the light beam will hit the photosensitive surface at an angle. Generally, when illuminating a certain surface, the illuminance of that surface is the co of the angle of inclination of the light ray.
sine, so if the emission intensity of each light source is constant, the brightness per unit area of the image produced by a microlens near the optical axis of the projection lens 4 and the image produced by a microlens located far away. There is a problem in that the conditions for exposure become non-uniform.
［問題点を解決するための手段］
本発明は、上記従来の問題点を解決するためになされた
もので、前述のような光源アレイ、原画パターンアレイ
、レンズアレイを組み合せた結像光学系において、各光
源の駆動回路に、各光源の点灯時間又は発光強度を各光
源ごとに異った値に設定可能な機能を持たせる事により
、各々の微小レンズによる各文字パターンの感光面上で
の単位面積あたりの明るさを等しくする事ができるもの
である。[Means for Solving the Problems] The present invention has been made to solve the above-mentioned problems of the conventional art. By equipping the drive circuit of each light source with a function that allows the lighting time or emission intensity of each light source to be set to a different value for each light source, each character pattern on the photosensitive surface is controlled by each microlens. It is possible to equalize the brightness per unit area.
［作 用］
感光のプロセスは一般に、単位時間あたりの照度（単位
面積あたりの明るさ）と、感光時間との積によって、感
光量が規定されるため、本発明によって各光源ごとに点
灯時間又は発光強度を特定の値に設定する事によって、
各光源に対応する像における感光１を均一にする事がで
きる。[Function] Generally, in the process of photosensitization, the amount of photosensitivity is defined by the product of the illuminance per unit time (brightness per unit area) and the exposure time. By setting the emission intensity to a specific value,
It is possible to make the exposure 1 uniform in the image corresponding to each light source.
［実 施 例コ
第１図及び第２図は、本発明の実施例を示す模式図であ
る。図中、■はＬＥＤアレイ、２は文字パターンアレイ
、３は微小レンズアレイ、４は投影レンズ、５は感光面
、５′は感光ドラムである。[Embodiment] FIGS. 1 and 2 are schematic diagrams showing an embodiment of the present invention. In the figure, ■ is an LED array, 2 is a character pattern array, 3 is a microlens array, 4 is a projection lens, 5 is a photosensitive surface, and 5' is a photosensitive drum.
第１図は、各光源の発光強度を各々別々の値に設定する
回路を用いた例を示してあり、第２図は、各光源の点灯
時間を各々設定する回路を用いた例を示しである。Figure 1 shows an example using a circuit that sets the emission intensity of each light source to a different value, and Figure 2 shows an example using a circuit that sets the lighting time of each light source. be.
各々の発光強度、点灯時間の設定値は感光ドラムの形状
、主光線の傾き角等によって設計段階で決まる値であり
、各光源ごとにＲＯＭ等にメモリしておけばよい。Setting values for each light emission intensity and lighting time are determined at the design stage depending on the shape of the photosensitive drum, the tilt angle of the chief ray, etc., and may be stored in a ROM or the like for each light source.
第１図において、文字データはデコーダ６でデコードさ
れ、ＸＹアドレス発生器７を介し゛Ｃ１マトリクススイ
ッチ８の特定のゲートのみＯＮにし、これに対応したＬ
ＥＤにのみ電流が流れるようにする。一方、デコーダ６
は、各光源による感光量が均一になるような値がメモリ
されているＲＯＭ９をアクセスし、この設定値により、
ドライバー１０を介してＬＥＤに流れる電流の大きさを
制御する。In FIG. 1, character data is decoded by a decoder 6, and only a specific gate of the C1 matrix switch 8 is turned on via an XY address generator 7, and the corresponding L
Allow current to flow only to ED. On the other hand, decoder 6
accesses the ROM 9, which stores values that make the amount of exposure from each light source uniform, and uses this set value to
The magnitude of the current flowing to the LED via the driver 10 is controlled.
第２図も第１図と同様であるが、ＲＯＭ９の中で設定値
でパルスジェネレータ１１のパルス幅を制御し、ＬＥＤ
に流れる電流のＯＮ時間を制御している所が第１図と異
なる。Fig. 2 is similar to Fig. 1, but the pulse width of the pulse generator 11 is controlled by the set value in the ROM 9, and the LED
The difference from FIG. 1 is that the ON time of the current flowing through the circuit is controlled.
本発明で使用するレンズアレイ３としては、微小レンズ
を一次元又は二次元的に同一平面上に適宜間隔をおいて
配列固定したものであれば構造に特に制限はないが、ガ
ラス、プラスチック等の透明基板中に基板の屈折率を増
大させる物質を基板表面の多数点から拡散させることに
より、中心から外側に向けて屈折率が漸減する略半球状
の微小レンズ部分を多数一体形成した平板マイクロレン
ズが最も好適である。The lens array 3 used in the present invention is not particularly limited in structure as long as it is one-dimensionally or two-dimensionally arranged and fixed microlenses on the same plane at appropriate intervals, but it can be made of glass, plastic, etc. A flat microlens that integrates a large number of roughly hemispherical microlens parts whose refractive index gradually decreases from the center outward by diffusing a substance that increases the refractive index of the substrate from multiple points on the substrate surface into a transparent substrate. is the most suitable.
［発明の効果コ
本発明によれば、従来問題であった各光源に対応する像
の感光量の不均一性が解消され、任意の文字が同一の感
光量で結像する事が可能となり、品質のそろった高品位
の印字が可能となる。[Effects of the Invention] According to the present invention, the conventional problem of non-uniformity in the amount of exposure of images corresponding to each light source is solved, and it becomes possible to image any character with the same amount of exposure. High quality printing with uniform quality is possible.
また、製造工程において、各光源からの発光量を測定し
、この値を設定値に反映してやれば、光源自身の発光強
度のばらつきも同時に補正できる。Furthermore, by measuring the amount of light emitted from each light source during the manufacturing process and reflecting this value in the set value, variations in the light emission intensity of the light sources themselves can be corrected at the same time.
なお、本発明では、各文字パターンの切換えを、光源ア
レイの特定の光源をＯＮする事によって１テっでいるが
、例えば液晶シャッタアレイで各文字パターンをスイッ
チングする事によって行う事も出来る。このような場合
、液晶シャッタアレイの各エレメントの開いている時間
を制御してやれば、同様の効果が得られる。In the present invention, each character pattern is switched in one step by turning on a specific light source of the light source array, but it can also be done by switching each character pattern using, for example, a liquid crystal shutter array. In such a case, the same effect can be obtained by controlling the open time of each element of the liquid crystal shutter array.
第１図は本発明の一実施例を示す模式図、第２図は本発
明の他の実施例を示す模式図、第３図は従来の結像光学
装置を示す斜視図である。
１・・・・・・ＬＥＤアレイ ２・・・・・・文字パタ
ーンアレイ ３・・・・・・微小レンズアレイ ４・・
・・・・投影レンズ ５・・・・・・感光面 ５′・・
・・・・感光ドラム６・・・・・・デコーダ ７・・・
・・・ＸＹアドレス発生器８・・・・・・マトリクスス
イッチ ９・・・・・・ＲＯＭ１０・・・・・・ドライ
バー １１・・・・・・パルスジェネレータ
第１図
第２図
第 ３ 図（従来例）FIG. 1 is a schematic diagram showing one embodiment of the present invention, FIG. 2 is a schematic diagram showing another embodiment of the invention, and FIG. 3 is a perspective view of a conventional imaging optical device. 1...LED array 2...Character pattern array 3...Minute lens array 4...
...Projection lens 5...Photosensitive surface 5'...
...Photosensitive drum 6...Decoder 7...
... XY address generator 8 ... Matrix switch 9 ... ROM 10 ... Driver 11 ... Pulse generator Fig. 1 Fig. 2 Fig. 3 ( Conventional example)
Claims (1)
レイの各光源と１対１に対応して配置した文字、数字、
記号等を表わす透過パターンアレイと、前記各光源及び
前記各透過パターンと１対１に対応して配置した微小レ
ンズアレイと、前記各光源から射出して前記各透過パタ
ーンと前記各微小レンズを通過した光束のうち、少なく
とも２つ以上の微小レンズを通過した光束が同時に入射
可能な大きさの入射瞳を持った第２のレンズとを備え、
各透過パターンの像を、前記微小レンズアレイと前記第
２のレンズで構成した結像レンズ系の結像面に形成する
結像光学系であって、各光源の駆動回路は、各光源の点
灯時間又は発光強度を各光源ごとに異った値に設定可能
な機能を持つ事を特徴とする結像光学装置。A light source array arranged one-dimensionally or two-dimensionally, and letters and numbers arranged in one-to-one correspondence with each light source of the light source array,
a transmission pattern array representing symbols, etc., a microlens array arranged in one-to-one correspondence with each of the light sources and each of the transmission patterns, and light emitted from each of the light sources and passing through each of the transmission patterns and each of the microlenses. a second lens having an entrance pupil large enough to allow simultaneous entry of the light fluxes that have passed through at least two microlenses among the light fluxes;
An imaging optical system that forms an image of each transmission pattern on an imaging surface of an imaging lens system constituted by the microlens array and the second lens, wherein a drive circuit for each light source is configured to turn on each light source. An imaging optical device characterized by having a function that allows time or emission intensity to be set to different values for each light source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32348587A JPH01163079A (en) | 1987-12-21 | 1987-12-21 | Imaging optical device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32348587A JPH01163079A (en) | 1987-12-21 | 1987-12-21 | Imaging optical device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01163079A true JPH01163079A (en) | 1989-06-27 |
Family
ID=18155216
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP32348587A Pending JPH01163079A (en) | 1987-12-21 | 1987-12-21 | Imaging optical device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01163079A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003131560A (en) * | 2001-08-10 | 2003-05-09 | Goto Optical Mfg Co | Projector for planetarium |
-
1987
- 1987-12-21 JP JP32348587A patent/JPH01163079A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003131560A (en) * | 2001-08-10 | 2003-05-09 | Goto Optical Mfg Co | Projector for planetarium |
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