JPS59149339A - Original illuminating device - Google Patents

Original illuminating device

Info

Publication number
JPS59149339A
JPS59149339A JP58025363A JP2536383A JPS59149339A JP S59149339 A JPS59149339 A JP S59149339A JP 58025363 A JP58025363 A JP 58025363A JP 2536383 A JP2536383 A JP 2536383A JP S59149339 A JPS59149339 A JP S59149339A
Authority
JP
Japan
Prior art keywords
concave mirror
fluorescent lamp
light
center
aperture
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
JP58025363A
Other languages
Japanese (ja)
Inventor
Makoto Kato
誠 加藤
Shigeru Iemura
茂 家村
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.)
Panasonic System Solutions Japan Co Ltd
Panasonic Holdings Corp
Original Assignee
Matsushita Graphic Communication Systems Inc
Matsushita Electric Industrial 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 Matsushita Graphic Communication Systems Inc, Matsushita Electric Industrial Co Ltd filed Critical Matsushita Graphic Communication Systems Inc
Priority to JP58025363A priority Critical patent/JPS59149339A/en
Publication of JPS59149339A publication Critical patent/JPS59149339A/en
Pending legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03BAPPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B27/00Photographic printing apparatus
    • G03B27/32Projection printing apparatus, e.g. enlarger, copying camera
    • G03B27/52Details
    • G03B27/54Lamp housings; Illuminating means
    • G03B27/542Lamp housings; Illuminating means for copying cameras, reflex exposure lighting

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Light Sources And Details Of Projection-Printing Devices (AREA)
  • Facsimile Scanning Arrangements (AREA)

Abstract

PURPOSE:To form a small-sized original illuminating device which can improve considerably the illumination efficiency, by providing a concave mirror which reflects the light emitted from an aperture type fluorescent lamp and condenses it to a position to be illuminated and focusing the light emitted from the center of luminescence of the fluorescent lamp to the position to be illuminated with an approximate unmagnification by the concave mirror. CONSTITUTION:Most of the luminous flux emitted from an aperture 2 of a fluorescent lamp 1 is made incident to a main concave mirror 9 and is condensed to a read position F2 by this mirror 9, and in this case, l1approx.=l2 is true so that the light emitted from a center F1 of luminescence of the fluorescent lamp 1 is focused in unmagnification in the read position F2 without aberrations. An auxiliary concave mirror 10 reflects the light, which comes from the main concave mirror 9 and is reflected in the read position F2, again to return it to the read position F2. Since the light emitted from the center F1 of luminescence is focused in the read position F2 with unmagnification by the main concave mirror 9 and the light emitted from the part other than the center F1 of luminescence is focused near the read position F2 similarly, the condensing efficiency is considerably enhanced.

Description

【発明の詳細な説明】 産業上の利用分野 本発明は、ファクシミリ送信機や複写機等において、原
稿を照明する原稿1j(i明装置に関する。
DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a document illumination device for illuminating a document in a facsimile transmitter, a copying machine, or the like.

従来例の構成とその問題点 この種の原稿1)σ明装置は、通常、螢光う/プまたは
ハロゲンラッグ等の細長い光源と、適当な集光光学系と
を組み会わせて構成されることが多い。
Construction of conventional examples and their problems This type of manuscript 1) A σ light device is usually constructed by combining a long and narrow light source such as a fluorescent tube or halogen lug with a suitable condensing optical system. There are many things.

前記集光光学系は、最近、ファクシミリ送信機や複写機
等の高速化の要請に応じて特に重要になってきたもので
あり、集光効率を上げるために、反射鏡筐たは円柱レン
ズ系によるものが工夫されている。
The above-mentioned condensing optical system has recently become particularly important in response to the demand for faster speeds in facsimile transmitters, copying machines, etc., and in order to increase the condensing efficiency, reflector housings or cylindrical lens systems are used. This has been devised.

寸た、前記光源として螢光ラップが用いられる場合VC
は、アパーチャ型螢光ランプ(管内壁の大部分の領域に
反射膜と螢光体全型ねて被覆する一方、管内壁の残やの
一部の領域には、前記反射膜および螢光体全被覆しない
で、アパーチャとし、このアパーチャから光を射出させ
る形式の螢光う/グ)か用いられることが多くなって@
た。次に、このアノにチャ型螢光ランプの峙性について
若干説明しておく。
In addition, when fluorescent wrap is used as the light source, VC
is an aperture type fluorescent lamp (most area of the inner wall of the tube is coated with a reflective film and phosphor, while some remaining areas of the inner wall of the tube are coated with the reflective film and phosphor). Increasingly, a type of fluorescent light is used in which an aperture is formed without covering the entire surface and light is emitted from this aperture.
Ta. Next, I would like to explain a little about the characteristics of a tea-type fluorescent lamp.

第1図は、緑色螢光管の一例(アパーチャの開11角は
700)の」易升における、アパーチャ上方中火でかつ
′1イ壁而に平行な面上での實゛壁がらの距1ζIIJ
 dとpi!4度との関係を実測して示した特性図、第
21スは11仮の一般照明用螢光う/ブのw7升におけ
る、前配管+j、%がらの距離dと照度との関係全実測
して示した特性図である。
Figure 1 shows the actual distance between the walls of an example of a green fluorescent tube (the aperture angle 11 is 700) when the flame is medium above the aperture and parallel to the wall. 1ζIIJ
d and pi! The characteristic diagram showing the relationship with 4 degrees is actually measured, and the 21st stage shows the relationship between the distance d from the front pipe +j, % and the illuminance in 11 tentative general lighting fluorescent lamps w7 squares. FIG.

これらの図から明らかなように、アパーチャ型線光ラン
プでは、一般11(イ明J−fl螢光ラッグに比べ照j
騙が大幅に改善されるが、距離dが大きくなるに従って
、f)、檄に照度が低下する。
As is clear from these figures, the aperture type line lamp has a lower illuminance compared to the general 11 (Ime J-fl) fluorescent lug.
The brightness is greatly improved, but as the distance d increases, the illuminance decreases significantly.

第3図は、このようなアパーチャgap、螢光ランフを
用いた従来の原稿照明装置の一例の概略断面図を示し、
アパーチャ型螢光管1のアパーチャ2から射出された光
を円柱レンズ3によって原fA D’n 4の読取位置
F2・に集光するようになっている。
FIG. 3 shows a schematic cross-sectional view of an example of a conventional document illumination device using such an aperture gap and fluorescent lamp.
Light emitted from an aperture 2 of an aperture type fluorescent tube 1 is focused by a cylindrical lens 3 onto a reading position F2 of an original fA D'n 4.

しかし、このような装部においては、軸外球面収差が犬
きく、かつ色収差もあるので、集光が困難である上、レ
ンズ3が厚肉となって、結果的に螢光う/ゾ1の発光中
心F1と読取位置F2との距離が大きくなり、発光中心
F1以外のところから尤HEtする光の集光効率が低下
するという欠点があった。
However, in such a mounting part, there is severe off-axis spherical aberration and chromatic aberration, so it is difficult to focus light, and the lens 3 becomes thick, resulting in fluorescent light. This has the disadvantage that the distance between the light emission center F1 and the reading position F2 becomes large, and the efficiency of collecting light from areas other than the light emission center F1 decreases.

第4図は、アパーチャ型螢光うップ全用いた従来の原稿
照明装置の他の例を示し、レンズは月」いす、アパーチ
ャ型螢光ラップ1の発光中心F1と読取位置F2とを(
1υ(力接近させ、F2伺近からの反射光を凹面鏡5に
より再度反射させてF2伺近に戻し、再利用するもので
ある。なお、Mf前記凹[Ml@6の反射面は、F2i
中心とする円柱面* $成している。
FIG. 4 shows another example of a conventional document illuminating device using an aperture-type fluorescent wrap.
1υ (force approach), and the reflected light from near F2 is reflected again by concave mirror 5 and returned to near F2 for reuse. Note that the reflective surface of Mf said concave [Ml@6 is F2i
It consists of a cylindrical surface with a central part * $.

このような従来製布゛では、次に述べる即由により、発
光中心F1と読取位置F2との接近距離には限Wかある
ため、集光効率を良好にすることができなかった。
In such a conventional cloth, for the reason described below, there is a limit W to the approach distance between the light emission center F1 and the reading position F2, and therefore it has not been possible to improve the light collection efficiency.

すなわち、複写機の場合には、原稿面4と螢光ラップ1
との間に、原稿を載置するガラス板が介在するので、発
光中心F1と読取位1岬(露尤位#)F2との距1η[
(:ヲあるオヤ度以上小さくすることかで@ない。寸た
、ファクシミリ送1言磯の場合においては、発光中〕し
Flと読取位置F2と衾結ぶ直線が、結1象し/ズおよ
びイメージセッサ(共に図示ぜず)の)シ1噛6に対し
、なす角1島:ヲθ、アパーチャ2 (!: f4□I
I’、取位FJF2との間の距!#le k pト−t
’ ;6 ト、θ〉45°、p≧10mmという制約の
下に置かれ、それ以ヒ接近させるとイメージセッサ側か
ら見て、原稿像のコ/トラストが低下したり、螢光ラン
プ1f/rCよって原1高像が政られたジする等の不都
合を牛じるので、やはり、発光中心F1と読取位置F2
とのitt趨11 ’にある程度以上小さくすることが
できない。
In other words, in the case of a copying machine, the original surface 4 and the fluorescent wrap 1
Since there is a glass plate on which the original is placed between the two, the distance 1η[
(It doesn't matter if you make it smaller than a certain degree. In the case of facsimile transmission, it is emitting light.) Then, a straight line connecting Fl and reading position F2 is the result. Angle 1 island: wo θ, aperture 2 (!: f4□I)
I', distance between position FJF2! #lekpt
';6 If the document is placed under the constraints of g, θ>45°, and p>=10 mm, if it is brought closer than that, the co/trust of the original image will decrease as seen from the image processor side, and the fluorescent lamp 1f/ To avoid inconveniences such as the original 1 height image being distorted by rC, the light emitting center F1 and the reading position F2 are
It cannot be made smaller beyond a certain point due to the itt trend 11'.

第6図は、ハロゲンラップ、水銀燈等のように、360
0方向に光を発散する光源を月1いた従来の原稿照明装
Nを示す。7はその反射面が楕円柱1ni(楕円を導線
とする柱面)全構成する凹面鏡、8は凹面鏡7の第1の
焦点f1vC置かれた光源であり、光源8から発散した
光が凹17ii 鋭7の第2の焦点f2.(この位置V
C読取位置が首か力、る)に集光される構成となってい
る。
Figure 6 shows 360
A conventional document illumination device N is shown that includes a light source that emits light in the zero direction. 7 is a concave mirror whose reflective surface is entirely composed of an elliptical cylinder 1ni (a cylindrical surface with an ellipse as a conducting wire), 8 is a light source placed at the first focal point f1vC of concave mirror 7, and the light diverging from the light source 8 is concave 17ii sharp. 7 second focal point f2. (This position V
The C reading position is configured so that the light is focused on the neck.

この場合、凹面@7の存在により袈i首が大型化する他
、集光点での光源の像倍率が図の12/e1のファクタ
金倉み、その逆数に比例して集光点での照度は低下“艷
−るという欠点があった。fた、前記ハロゲ/う/グは
螢yCランプに比べて発熱甲が多く、装置設計上取り扱
いがψ1fシいという欠点があった。
In this case, the presence of the concave surface @7 increases the size of the neck, and the image magnification of the light source at the focal point is a factor of 12/e1 in the figure, and the illuminance at the focal point increases in proportion to the reciprocal. The halogen lamp had the disadvantage of causing a drop in the temperature.Furthermore, the halogen lamp had a disadvantage in that it had more heat generating shells than the cylindrical lamp and was difficult to handle due to the device design.

発明の目的 本発明は、前記従来の欠点を解消するべくなされたもの
で、アパーチャ型螢光ランプを用い、小型で、従来より
照明効率全太幅に改善することができる原稿照明装置を
提供することを目的とする。
OBJECTS OF THE INVENTION The present invention has been made to eliminate the above-mentioned drawbacks of the conventional art, and provides a document illuminating device that uses an aperture type fluorescent lamp, is compact, and can improve illumination efficiency to a greater extent than the conventional one. The purpose is to

発明の(“11を成 本発明Vこよる原4°1制御(イ明装置は、アパーチャ
型螢光う7ブと、この螢光ランプのアパーチャから射出
された光を反射して照明必要位置(読取位置等)に里尤
する凹ll′11境とを設け、前記螢光ランプの発光中
心から発したyCが前記凹1a1鏡によって前記照明必
・妓位置にほぼ等倍結像するようにしたことにより、前
記目的全達成するものである。
The original 4° 1 control system based on the present invention V is comprised of an aperture-type fluorescent lamp and reflects light emitted from the aperture of the fluorescent lamp to illuminate the necessary position ( A concave boundary is provided at the reading position, etc., so that the yC emitted from the light emission center of the fluorescent lamp is imaged at approximately the same magnification at the illumination position by the concave mirror 1a1. By doing so, all of the above objectives are achieved.

実ノ准例の説明 第6図は、本発明の一実施例によるファクンミリ尤学系
の原稿!!(イ明装置の概略断面1スである。1はアパ
ーチャ型螢光ランプ、2は同う、/ブ1のアパーチャ、
9は主凹面鏡、4は原稿面、Flは螢、)Cう/フ1の
光ye中心、F2にL読取位置であり、l’+il記王
凹面ψ9の反射向は、発光中心F1および仇取位i9 
F 2を1、(イ点とする楕円柱面を構成しでいる。
Explanation of Actual Quasi-Example Figure 6 is a manuscript of the Fakunmiri theory system according to an embodiment of the present invention! ! (This is a schematic cross section of the lighting device. 1 is an aperture type fluorescent lamp, 2 is the same, /B 1 aperture,
9 is the main concave mirror, 4 is the document surface, Fl is the firefly, ) C is the light ye center of 1, F2 is the L reading position, and the reflection direction of the concave surface ψ9 is the light emission center F1 and the enemy. Torii i9
It constitutes an elliptical cylindrical surface with F 2 as 1 and (A point).

したがって、螢光う/プ1のアパーチャ2から射出され
る光束は大部分(発光中心F+i中心としてfη[60
0以」二に渡る)主凹面鏡9に入射し、同凹面鏡9によ
って読取位置F2に集光されるが、螢光ラップ1の発光
中心F1から発した光力唾売取位滌F2に無収差で等倍
結像されるように、11=42とされている。ただし、
ここで、主凹面鏡90反射面とその短径との交点iAと
すると、4)1’1dFjと点Aとの間の距IM1c 
、  β2はF2と点Aとの間の距離である。
Therefore, most of the luminous flux emitted from the aperture 2 of the fluorescent tube 1 (with the luminous center F+i being the center fη[60
The light enters the main concave mirror 9 (from 0 to 2) and is focused on the reading position F2 by the concave mirror 9, but the light emitted from the light emission center F1 of the fluorescent wrap 1 is transmitted to the center F2 without aberration. 11=42 so that the image is formed at the same magnification. however,
Here, if the intersection point iA of the main concave mirror 90 reflecting surface and its short axis is 4) the distance IM1c between 1'1dFj and point A.
, β2 is the distance between F2 and point A.

10は補助凹面鏡であり、主凹面鏡9から到来踵読取位
置F2において反射された光全再度反射し、読取位置F
2へ戻すようになっている。11id 結像L/ 7ズ
、12はイメージセッサ、6は結像レンズ11およびイ
メージセッサ12の光軸である。
Reference numeral 10 denotes an auxiliary concave mirror, which reflects all of the light reflected from the main concave mirror 9 at the heel reading position F2, and returns the light to the reading position F2.
It is set to return to 2. 11id is an imaging lens L/7, 12 is an image processor, and 6 is an optical axis of the imaging lens 11 and the image processor 12.

この原稿1!σ明装置では、−上述のように、発光中心
F1から発した光が王凹mi境9によって読取位置F2
に等倍結像されるようになっており、寸た、発光中心F
1以外から発した光も同様にして読取位RF2付近に結
像されるので、集光効率全非常に高くすることができる
This manuscript 1! In the σ light device, - As mentioned above, the light emitted from the light emitting center F1 is directed to the reading position F2 by the concave mi boundary 9.
The image is formed at the same magnification as the light emission center F
Since light emitted from sources other than 1 is similarly imaged near the reading position RF2, the overall light collection efficiency can be made very high.

なお、不実施例では、補助凹面鏡10が設けられ2てい
るので、より一層J4S:九効率を向上することができ
るが、での補助凹面−億10は必ずしも設けなくてもよ
い。
In addition, in the non-example, since the auxiliary concave mirror 10 is provided, the J4S:9 efficiency can be further improved, but the auxiliary concave mirror 10 is not necessarily provided.

実(’1illによれば、あるアパーチャ型螢光ランプ
(’直fii、’r”Ar、 I da = O−4A
 %  管径15 mm)  の、JL4合、管A::
(: i4C上ff1i −’c )照度1J220−
000 lux  (jijイ度セ/ザ而の法面腺は管
面に屯直に設定)であった。
According to '1ill, an aperture-type fluorescent lamp ('direct fii, 'r'Ar, I da = O-4A
% Pipe diameter 15 mm), JL4, Pipe A::
(: ff1i-'c on i4C) Illuminance 1J220-
000 lux (the slope of the tube was set directly on the tube surface).

そして、この濠光ラッグを第6図の螢光ラップ1として
使用]し、かつβ1= 12 =20mml、たとき、
誼1取位(直F 2 VCおける照度は約200.○○
Qluxとなった(なふ・、このときの主凹面鏡9の反
射率は約90係であった)。
Then, when this moated light wrap is used as the fluorescent wrap 1 in Fig. 6] and β1 = 12 = 20 mml,
誼1 (direct F2 VC illuminance is approximately 200.○○
Qlux (Nafu, the reflectance of the main concave mirror 9 at this time was about 90 factors).

こ才1.は、1原稿面4から10mm枝度囲1し/ζ螢
−九う/グ1で、直j妾原着面4を照射する場イ〒に比
べ、3倍強の照度の改善に相当する。円柱し/ズで集光
して照)Wケ−ヒげる場合には、たかだか1・6倍程度
の照度の改善に留筐るので、上述の3倍強の照度の改善
は著しい効果である。
Talented 1. In this case, the illuminance is improved by more than 3 times compared to the case where the direct printing surface 4 is irradiated with a width of 10 mm from the original surface 4 of 1 / ζ - 9 / 1. . If the light is focused and illuminated by a cylindrical lens or lens, the illuminance will only be improved by a factor of 1.6 at most, so the above-mentioned improvement in illuminance of more than 3 times is a significant effect. be.

第7図は、本発明の他の実繍例による原稿照明装置と4
の概略断面図である(なお、以−ドの各実施例において
、前記第6図の実姉例の場合と同一−fたは相当する部
品な同I−符号をもって示す)O不実施例では、前記第
6図における主凹面鏡9および補助口…1鏡10凱合成
酊脂等の成型品13に反射向の処理全施すことにより一
体構成としている。
FIG. 7 shows a document illuminating device according to another embodiment of the present invention and a fourth embodiment of the present invention.
(In each of the following embodiments, the same -f or corresponding parts as in the actual sister example of FIG. 6 are indicated by the same reference numerals.) In FIG. 6, the main concave mirror 9 and the auxiliary port 1 mirror 10 are integrally constructed by fully processing the reflection direction on the molded product 13 made of synthetic resin or the like.

第8図は、本発明のさらに他の実施例に」こる照明装置
の概略断面1スである。
FIG. 8 is a schematic cross-sectional view of a lighting device according to still another embodiment of the present invention.

不実施例では、主凹面鏡9の反射向が円柱面(円を4線
とする柱面)を構成している。そして、発光中心F1と
主凹σ+r′m、90反射面との間の距η1「43と読
取位ItF2と主凹面鏡9の反射向との間の距肉([F
4と衾はぼ等しくするとともに、これらの距離β5.F
4に比べ、発光中41.F1とiクシ取位i@ F 2
との間の距Nft qをやや小さくすることによって、
主凹部、境9の反射向が円柱面であるにもかかわらず、
収差の少ない結像が得られるようにしている。ただし、
ここで、FlとF2とを結ぶ線分に対し垂直で力)つ王
凹面a9の曲率中1bk通る線分Eと、前記反射面との
交点(zBとすれば、(lstdF2と点Bとの間の距
離、1all−JFlと点Bとの間の距離である。
In the non-example, the reflection direction of the main concave mirror 9 constitutes a cylindrical surface (a cylindrical surface having four lines of circles). Then, the distance η1 "43 between the light emission center F1 and the main concave σ+r'm and the reflecting surface 90, and the distance between the reading position ItF2 and the reflection direction of the main concave mirror 9 ([F
4 and the neck are approximately equal, and their distance β5. F
Compared to 4, 41. F1 and i comb position i @ F 2
By making the distance Nft q slightly smaller,
Although the reflection direction of the main concave part and boundary 9 is a cylindrical surface,
This makes it possible to obtain an image with little aberration. however,
Here, if the intersection point (zB) of the line segment E, which is perpendicular to the line segment connecting Fl and F2 and passes through 1bk in the curvature of the concave concave surface a9, and the reflective surface, then the intersection between (lstdF2 and point B) This is the distance between 1all-JFl and point B.

楕円柱Ln1の加工より円柱面の加工の方が容易である
ことから、本実姉例では、主凹面鏡9の製造コスト全低
減することができる。ただし、]11[記第6図の実施
例の場合に比べ、集光効率が若干低トし、ThfI記実
施例とロー条件で測定したところによれば、読取位置F
2での11(イ度(rJ 1’ 60−000 lux
稈度であった。
Since machining the cylindrical surface is easier than machining the elliptical cylinder Ln1, the manufacturing cost of the main concave mirror 9 can be completely reduced in this sister example. However, the light collection efficiency is slightly lower than that of the embodiment shown in FIG.
2 in 11 (I degree (rJ 1' 60-000 lux
It was culm.

第91ン1は不発明のさらに他の実姉例による原稿照明
装置の主凹面鏡の平lJ′(i図、第10図は第91菌
のX−X線における断面)閃である。
No. 91 No. 1 is a plan view of the main concave mirror of a document illuminating device according to still another example of the uninvented sister (Fig.

本実施例では、主凹面鏡9の反射面は、−列に配列さ力
、た複数の1す1転惰円げ1114ケ構成している。
In this embodiment, the reflecting surface of the main concave mirror 9 has a plurality of 1114 single-turn curves arranged in a negative row.

前記各実j@ 1’illにおいては、主凹面鏡9の反
射面が柱面によって構成されていたため、該四面鏡9の
長手方向には集光機能を有していなかったので、111
[記長手力向に関しては反射光が発散して一部の光か無
駄になっていた。しかるに、本実施例では、」ユ凹面瞳
9の反射面が回転杼f円面14によっ−C構成されてい
るため、前記長手方向にも東光機能金有するので、より
一層集光効率を向上することができる。ただし、本実姉
例では、抗取位1首F 2 J二における照度分布に若
干凹凸ケ生じることになる。
In each of the above-mentioned real j@1'ill, since the reflecting surface of the main concave mirror 9 was constituted by a cylindrical surface, the four-sided mirror 9 did not have a light condensing function in the longitudinal direction.
[Regarding the longitudinal direction, the reflected light diverged and some of the light was wasted. However, in this embodiment, since the reflective surface of the concave pupil 9 is configured by the rotating shuttle f circular surface 14, Toko functional metal is also present in the longitudinal direction, so that the light collection efficiency is further improved. can do. However, in this example, there will be some unevenness in the illuminance distribution in the anti-seizure position 1 neck F 2 J 2.

第11図は、本発明のさらに他の実施例による主凹面(
境の正面図である。
FIG. 11 shows a main concave surface (
FIG.

本実施例では、主凹面鏡9の表面の一部領域に、透明寸
たは低反射率のmjからなる非反射領域16が設けもオ
しており、残りの部分を反射面9aとされている。そし
て、これにより反射面9aは、長手方向両端部伺近にお
いては幅が広く、中央に行くほど幅が狭くなるようにさ
れている。
In this embodiment, a non-reflective area 16 made of transparent or low-reflectance mj is provided in a part of the surface of the main concave mirror 9, and the remaining area is used as a reflective surface 9a. . As a result, the reflective surface 9a has a wide width near both ends in the longitudinal direction, and becomes narrower toward the center.

一般に、Rツe取光学系においてt;1、フェーディン
グの問題かあり、このフェーディングに対する補正を行
わないとすると、均一濃度の原稿m1を読み取ったとし
ても、読取位置上の相対像強度分布に、第12図の曲線
Cのようになり、両端部はど像強度が低下することにな
る。
In general, there is a problem with fading at t;1 in the R-T capture optical system, and if no correction is made for this fading, even if the document m1 of uniform density is read, the relative image intensity distribution at the reading position will be Then, the curve becomes like curve C in FIG. 12, and the image intensity decreases at both ends.

しかるに、本実施例では、反射面9&の形状が上述のよ
′)になっているため、読取位置F2上の11(句コ!
分イli k前記曲線Cと逆の関係となるようにすZ)
ことにより、第12図の曲線りで示されるように、前記
相対1象強度の分布を平坦にすることができる。すなわ
ち不実ノ崩例では、1](イ度の改善と同+1+’「に
、ンエーディノグ補IE金行うことができる。
However, in this embodiment, since the shape of the reflecting surface 9 & is as described above, the shape of 11 (phrase ko!) above the reading position F2.
The relationship should be inverse to the above curve C.
By doing so, the distribution of the relative one-parallel intensity can be made flat, as shown by the curved line in FIG. In other words, in the case of unfaithfulness, 1] (Improvement of degree + 1 + ') can be done with compensation IE money.

第13図は、本発明のさらに他の実施例による原稿照明
装置の主凹面鏡の屯げ11図を示す。本実施例では、主
凹面鏡9の表面には、同門1n1鏡9の幅7J向に延び
る直線状の非反射領域16が多数段けら)tでおり、そ
の残りの領域が反射1rireaとされている。そし、
て、各非政射領域16の幅δ2と各非反射領域15間の
11)1隔(δ1−δ2)との比全調整することによっ
て、前記第11図の実施例の場合と同様にシェーディノ
ダ補正金行うことができる。
FIG. 13 shows a top view of the main concave mirror of a document illuminating device according to still another embodiment of the present invention. In this embodiment, on the surface of the main concave mirror 9, there are many linear non-reflective areas 16 extending in the width direction of the mirror 9 (1n1 mirror 9), and the remaining area is the reflective area 1rirea. . stop,
By fully adjusting the ratio of the width δ2 of each non-reflection area 16 and the 11) distance (δ1-δ2) between each non-reflection area 15, the shaded area can be adjusted as in the embodiment shown in FIG. Correction money can be made.

発明の効果 功、上のように本発明による原稿照明装置斌は、アパー
チャ型螢光ラップの発光中心から発した光が、凹面箋に
よって読取位置等の照明必要位置にほぼ等倍結像するよ
うにしたことにより、小型で、従来より照明効率を大幅
に改善することができるという優れた効果ケ得らfl−
るものである。
Advantages of the Invention As described above, the document illumination device according to the present invention is such that the light emitted from the light emitting center of the aperture-type fluorescent wrap is focused at approximately the same magnification at the position where illumination is required, such as the reading position, by means of the concave label. By making the fl-
It is something that

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

、耶1図はアパーチャ型螢光ランプの管壁からの距離と
照度との・関係を示す特性図、第2図は一般11(1明
用の螢九ランプの管壁からの距離1と1!<1度の関係
を示す特性図、第3図は従来の原稿照明装置の概略断面
図、第4図は他の従昶の原稿1(α明装酒の概略断面図
、第6図はさらに他の従来のjバj4°帽!(1明装置
の概略断…1図、第6図は不発明の一実極例による原稿
照明装置の概略断面図、第7図に本発明の他の実施例に
よる原稿照明装kiの概略断面図、第8図は本発明のさ
らに他の実施例による原稿1!(イ明装置の概略断面図
、第9図に本発明のさらに他の実施例による上回σ11
説の市面図、第10図は第9図のX−X線における断面
図、第11図は不発明のさらに他の実姉例による主凹面
鏡の正面図、第12図は第11図の実施例におけるフェ
ーディング補正効果の説明図、第13図は不発明のさら
に他の実施例による主凹面鏡の正面図である。 1・・・・・・アパーチャ型・螢光ランプ、2・・・・
・アパーチャ、9・・・・主凹面鏡、14・・・・・回
転楕円面、Fl・・・・・発光中心、F2・・・・・・
読取位置。 代理人の氏名 弁用(士 中 尾 敏 男 ほか1名第
1図 第2図 脅¥;17”3/) fQ 峻d (tnmt第3図 第4図 ト6 第5図 第6図 第 7 図 at;  8  図 第9図 rgJ 9、 [ 2図 店先Xy、佐!L(壬赴五〉シ5“rilン3図
, Fig. 1 is a characteristic diagram showing the relationship between the distance from the tube wall of an aperture type fluorescent lamp and the illuminance, and Fig. 2 is a characteristic diagram showing the relationship between the distance from the tube wall of an aperture type fluorescent lamp and the distance 1 and 1 A characteristic diagram showing the relationship of ! Furthermore, another conventional illuminating device (1) is a schematic cross-sectional view of a document illuminating device according to an embodiment of the present invention, and FIG. FIG. 8 is a schematic cross-sectional view of a document illumination device ki according to another embodiment of the present invention, and FIG. exceeded by σ11
10 is a sectional view taken along line X-X in FIG. 9, FIG. 11 is a front view of a main concave mirror according to yet another actual sister example of the invention, and FIG. 12 is an embodiment of FIG. 11. FIG. 13 is a front view of a main concave mirror according to still another embodiment of the present invention. 1...Aperture type fluorescent lamp, 2...
・Aperture, 9...Main concave mirror, 14...Spheroidal surface, Fl...Light emission center, F2...
reading position. Agent's name Benyo (Toshio Nakao and 1 other person Figure 1 Figure 2 threat; 17"3/) fQ Shund (tnmt Figure 3 Figure 4 To 6 Figure 5 Figure 6 Figure 7) Figure at; 8 Figure 9 rgJ 9, [ Figure 2 Storefront Xy, Sa!

Claims (4)

【特許請求の範囲】[Claims] (1)  アパーチャ型螢光ランプと、この螢光ランプ
のアパーチャから射出された光を反射して原稿の1((
イ明必要位装置に集光する凹面鏡とを有してなり、前記
螢光ラング、ji(i明必要位省、および凹面、鋭相互
間の位置関係は、前記螢光ランプの発蓋中心から発した
光が前記凹面鏡によってnII記!1(イ明必蟹位高に
ほぼ等倍結像することとなる関係とされている原稿照明
装置。
(1) An aperture type fluorescent lamp and the light emitted from the aperture of this fluorescent lamp is reflected to
and a concave mirror for condensing light on the fluorescent lamp, and the positional relationship between the fluorescent lamp, the concave surface, and the sharp point is determined from the center of the lighting of the fluorescent lamp. An original illumination device in which the emitted light is focused by the concave mirror at approximately the same magnification as described above.
(2)凹面鏡の反射面は、螢光ランプの発光中心および
照明必要位置をそれぞれ焦点とする楕円柱面を構成する
特許請求の範囲第1項記載の原稿照明装置。
(2) The document illumination device according to claim 1, wherein the reflective surface of the concave mirror constitutes an elliptical cylinder surface whose focal point is the emission center of the fluorescent lamp and the position where illumination is required, respectively.
(3)凹面鏡の反射面は、螢光ラングの発光中心および
照明必要位置からほぼ等距離にある円柱面全構成し、か
つ前記発光中心と前記照明必要位置との間の距離は、前
記反射面と前記発光中心との間の距離および11■記反
射而と前記1!(【明必要位置との間の距離よりやや小
さくされたT4.;詐請求の範囲第1項記載の原稿照明
装置。
(3) The reflective surface of the concave mirror is a cylindrical surface that is approximately equidistant from the light emission center of the fluorescent rung and the required illumination position, and the distance between the light emission center and the required illumination position is the same as that of the reflective surface. and the distance between the luminescent center and the 11. reflection point and the 1.! ([T4 made slightly smaller than the distance between the brightness required position; Scope of Claims 1) The document illumination device according to claim 1.
(4)凹面鏡の反射面に、螢光ランプの発光中心および
照明必要位置をそれぞれ焦点とする複数個の回転楕円1
Iii全構成する特許請求の範囲第1項記載の原稿照明
装置。
(4) A plurality of spheroidal ellipses 1 are formed on the reflective surface of the concave mirror, with the focal point being the emission center of the fluorescent lamp and the required illumination position, respectively.
iii. A document illumination device according to claim 1, which comprises the entire document illumination device.
JP58025363A 1983-02-16 1983-02-16 Original illuminating device Pending JPS59149339A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP58025363A JPS59149339A (en) 1983-02-16 1983-02-16 Original illuminating device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP58025363A JPS59149339A (en) 1983-02-16 1983-02-16 Original illuminating device

Publications (1)

Publication Number Publication Date
JPS59149339A true JPS59149339A (en) 1984-08-27

Family

ID=12163752

Family Applications (1)

Application Number Title Priority Date Filing Date
JP58025363A Pending JPS59149339A (en) 1983-02-16 1983-02-16 Original illuminating device

Country Status (1)

Country Link
JP (1) JPS59149339A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61198224A (en) * 1985-02-28 1986-09-02 Fuji Xerox Co Ltd Exposing device for copying machine
JPS6227329U (en) * 1985-07-31 1987-02-19
JPS6257242U (en) * 1985-09-28 1987-04-09
EP0776019A2 (en) 1995-11-25 1997-05-28 FRITZ HARTMANN GERÄTEBAU GMBH & CO KG Rotary switch
US8546710B2 (en) 2007-01-26 2013-10-01 Panasonic Corporation Automatic transmission switch
WO2021006880A1 (en) * 2019-07-09 2021-01-14 Hewlett-Packard Development Company, L.P. Photoconductor having optical tag

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61198224A (en) * 1985-02-28 1986-09-02 Fuji Xerox Co Ltd Exposing device for copying machine
JPS6227329U (en) * 1985-07-31 1987-02-19
JPS6257242U (en) * 1985-09-28 1987-04-09
EP0776019A2 (en) 1995-11-25 1997-05-28 FRITZ HARTMANN GERÄTEBAU GMBH & CO KG Rotary switch
US8546710B2 (en) 2007-01-26 2013-10-01 Panasonic Corporation Automatic transmission switch
WO2021006880A1 (en) * 2019-07-09 2021-01-14 Hewlett-Packard Development Company, L.P. Photoconductor having optical tag
CN113383277A (en) * 2019-07-09 2021-09-10 惠普发展公司,有限责任合伙企业 Optical conductor with optical label
US11360428B2 (en) 2019-07-09 2022-06-14 Hewlett-Packard Development Company, L.P. Photoconductor having optical tag

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