JPH01181271A - Microfilm reader - Google Patents

Microfilm reader

Info

Publication number
JPH01181271A
JPH01181271A JP63004665A JP466588A JPH01181271A JP H01181271 A JPH01181271 A JP H01181271A JP 63004665 A JP63004665 A JP 63004665A JP 466588 A JP466588 A JP 466588A JP H01181271 A JPH01181271 A JP H01181271A
Authority
JP
Japan
Prior art keywords
mirror
screen
light
reflected
incident
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
JP63004665A
Other languages
Japanese (ja)
Other versions
JPH0831946B2 (en
Inventor
Hisamitsu Hori
堀 久満
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.)
Fujifilm Holdings Corp
Original Assignee
Fuji Photo Film 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 Fuji Photo Film Co Ltd filed Critical Fuji Photo Film Co Ltd
Priority to JP63004665A priority Critical patent/JPH0831946B2/en
Publication of JPH01181271A publication Critical patent/JPH01181271A/en
Publication of JPH0831946B2 publication Critical patent/JPH0831946B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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  • Microscoopes, Condenser (AREA)
  • Facsimile Scanning Arrangements (AREA)

Abstract

PURPOSE:To preclude the possibility of an external light deteriorating picture quality by arranging each mirror so that a plane including an incident/radiated light of the final mirror just before the screen is not in parallel with a plane including the incident/radiated light of the just preceding mirror. CONSTITUTION:The light transmitted through a film 18 is reflected in a prism 22 and made incident downward on the mirror 24. The radiated light reflected in the mirror 24 is made nearly horizontally incident on the final mirror 26 just before the screen 28, reflected and then led to the screen 28. That is, the plane (x) including the incident light (a) and the radiated light (b) in the mirror 24 just before the final end mirror 26 is nearly perpendicular. Moreover, the plane (y) including the incident light (b) and the radiated light (c) of the final end mirror 26 is made nearly horizontal. Thus, the external light through the screen 28 into a device case 44, even it is reflected in the final end mirror 26 and should it be returned to the mirror 24, since the light is reflected in the mirror 24 downward, the light is not returned to the screen 28.

Description

【発明の詳細な説明】 (産業上の利用分野) 本発明は、マイクロフィルムをスクリーンに拡大投影す
るマイクロフィルムリーダに関するものである。
DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a microfilm reader that enlarges and projects microfilm onto a screen.

(発明の技術的背景) マイクロフィルムの透過光を複数のミラーによって反射
して透過型スクリーンに導き、このスクリーンにマイク
ロフィルムの拡大像を結像させるマイクロフィルムリー
ダが広く知られている。
(Technical Background of the Invention) A microfilm reader is widely known in which light transmitted through a microfilm is reflected by a plurality of mirrors and guided to a transmission screen, and an enlarged image of the microfilm is formed on the screen.

この場合スクリーン上ン過型であるために、このスクリ
ーンの外側から電灯や日光などの外光がスクリーンを透
過して装置内部に入ることになる。
In this case, since the device is of the screen-up type, external light such as electric lights or sunlight passes through the screen and enters the inside of the device.

この外光の一部が内部のミラーに反射され、スクリーン
に戻る場合には、スクリーン上の画像が不鮮明になると
いう問題が生じる。
If part of this external light is reflected by an internal mirror and returned to the screen, a problem arises in that the image on the screen becomes unclear.

またこのマイクロフィルムの投影画像をラインセンサな
とで読取って、この画像を光デイスク装置にメモリした
り、プリンタに出力してハードコピーを得る場合に、ス
クリーンを透過した外光がミラーで反射してラインセン
サに入射すると、読取った画像の画質が著しく悪くなる
という問題が生じる。
In addition, when reading the projected image of this microfilm with a line sensor or the like and storing this image in memory in an optical disk device or outputting it to a printer to obtain a hard copy, external light that has passed through the screen is reflected by the mirror. When the light enters the line sensor, a problem arises in that the quality of the read image deteriorates significantly.

(発明の目的) 本発明はこのような事情に鑑みなされたものであり、ス
クリーンを透過して装置内に入った外光がスクリーンに
戻ることがなく、スクリーンの画質を向上させると共に
、このスクリーンの画像をラインセンサ等で読取る場合
にもこの外光が障害となることがないマイクロフィルム
リーダを提供することを目的とする。
(Objective of the Invention) The present invention was made in view of the above circumstances, and it is possible to prevent external light that has passed through the screen and entered the device from returning to the screen, improve the image quality of the screen, and improve the screen quality. An object of the present invention is to provide a microfilm reader in which external light does not become an obstacle even when an image of a microfilm is read using a line sensor or the like.

(発明の構成) 本発明によればこの目的は、複数のミラーによってマイ
クロフィルムの拡大投影像を透過型スクリーンに導いて
結像させるマイクロフィルムリーダにおいて、前記スク
リーンの直前の最終ミラーの入・出射光を含む平面と、
この最終ミラーの直前のミラーにおける入・出射光を含
む平面とを互いに非平行に配設し、スクリーンを透過し
て前記最終ミラーに入る外光が前記各ミラーに反射して
前記スクリーンに戻らないようにしたことを特徴とする
マイクロフィルムリーダにより達成される。
(Structure of the Invention) According to the present invention, this object is to provide a microfilm reader that uses a plurality of mirrors to guide an enlarged projected image of a microfilm onto a transmission screen to form an image, in which the last mirror in front of the screen enters and exits. A plane containing incident light,
The planes containing the incoming and outgoing light in the mirror immediately before this final mirror are arranged non-parallel to each other, so that external light that passes through the screen and enters the final mirror is not reflected by each of the mirrors and returns to the screen. This is achieved by a microfilm reader characterized by the following.

(実施例) 第1図は本発明の一実施例の全体図、第2図はその光学
系の拡大図である。
(Embodiment) FIG. 1 is an overall view of an embodiment of the present invention, and FIG. 2 is an enlarged view of its optical system.

これらの図において符号10は光源であり、この光源1
0の光はコンデンサレンズ12、防熱ガラス14、コー
ルドミラー16.マイクロフィルム18、投影レンズ2
0、画像反転用プリズム22、ミラー24.26を介し
て透過型スクリーン28に導かれ、このスクリーン28
にマイクロフィルム18の拡大画像を結像する。
In these figures, reference numeral 10 is a light source, and this light source 1
The light at 0 is transmitted through a condenser lens 12, a heat-insulating glass 14, a cold mirror 16. Microfilm 18, projection lens 2
0, the image is guided to a transmission screen 28 via an image reversing prism 22 and mirrors 24 and 26, and this screen 28
An enlarged image of the microfilm 18 is formed.

スクリーン28の背面にはCCDラインセンサ30が左
右に移動可能に配設されている。すなわちこのラインセ
ンサ30はスクリーン28を縦に横断する方向に長く配
置され、ラインセンサ30はその長さ方向に画像を読出
して画像信号αを順次時系列信号として出力することに
より主走査を行い、またこのラインセンサ28を左右方
向に移動させることにより副走査を行う、このラインセ
ンサ30の画像信号αは入力インターフェース32を介
してCPU34に入力され、ここで種々の処理が行われ
、画像信号が二値化される。この二値化された画像信号
βは出力インターフェース36を介してプリンタ38に
出力され、ここで画像がプリントアウトされ、ハードコ
ピーが得られる。またCPU34が出力する二値化され
た信号βは光デイスク装置40等の外部記憶装置に記録
できる。従って必要に応じて光デイスク装置40から必
要な原稿の画像を読出してプリンタ38によりプリント
アウトしてもよい、なお42はCPU34のメモリであ
る。
A CCD line sensor 30 is disposed on the back side of the screen 28 so as to be movable left and right. That is, the line sensor 30 is disposed long in the direction that vertically traverses the screen 28, and the line sensor 30 performs main scanning by reading out images in the length direction and sequentially outputting the image signal α as a time-series signal. The image signal α of the line sensor 30, which performs sub-scanning by moving the line sensor 28 in the left-right direction, is input to the CPU 34 via the input interface 32, where various processing is performed and the image signal is Binarized. This binarized image signal β is outputted to the printer 38 via the output interface 36, where the image is printed out and a hard copy is obtained. Further, the binary signal β outputted by the CPU 34 can be recorded in an external storage device such as an optical disk device 40. Therefore, if necessary, a necessary original image may be read out from the optical disk device 40 and printed out by the printer 38. Note that 42 is a memory of the CPU 34.

前記マイクロフィルム18は第1図に示すように装置ケ
ース44に設けたフィルム台46に水平に置かれ、光は
このフィルム18を垂直に上方へ向って透過する。この
フィルム18を透過した光はプリズム22において反転
されミラー24に下方から入射する。このミラー24で
反射された出射光はミラー26すなわちスクリーン28
の直前の最終ミラー26にほぼ水平に入射し、ここで反
射されてスクリーン28に導かれる。すなわちこの最終
ミラー26の前のミラー24において、その入射光aと
出射光すとを含む平面χは第2図に仮想線で示すように
ほぼ垂直となる。また最終ミラー26の入射光すと出射
光Cとを含む平面yはほぼ水平となる。このためスクリ
ーン28を通って装置ケース44内に入った外光は、最
終ミラー26で反射されて万一ミラー24に戻ったとし
ても、このミラー24で下方へ反射されるから、スクリ
ーン28に戻ることはない。
As shown in FIG. 1, the microfilm 18 is placed horizontally on a film stand 46 provided in an apparatus case 44, and light passes through the film 18 vertically upward. The light transmitted through this film 18 is reversed at a prism 22 and enters a mirror 24 from below. The emitted light reflected by this mirror 24 is transmitted to a mirror 26, that is, a screen 28.
The light enters the final mirror 26 in front of the mirror 26 almost horizontally, where it is reflected and guided to the screen 28 . That is, in the mirror 24 in front of the final mirror 26, the plane χ containing the incident light a and the outgoing light a is substantially perpendicular as shown by the imaginary line in FIG. Further, the plane y including the incident light C and the outgoing light C of the final mirror 26 is approximately horizontal. Therefore, even if the external light that enters the device case 44 through the screen 28 is reflected by the final mirror 26 and returns to the mirror 24, it will be reflected downward by this mirror 24 and will return to the screen 28. Never.

この実施例においては2つのミラー24.26における
入・出射光を含むそれぞれの平面χ、yをほぼ直交する
ようにしている。しかし本発明は内平面χ、yを非平行
として内平面χ、yがなす角度を一定以上にすれば、外
光がスクリーン28に戻るのを防止でき、この内平面χ
、yがなす角度は、スクリーン28の全ての位置で、ど
の角度で入射した外光もスクリーン28に戻らないよう
に具体的に決定されるべきものである。
In this embodiment, the planes χ and y of the two mirrors 24 and 26 containing the incident and output light are substantially perpendicular to each other. However, in the present invention, by making the inner planes χ, y nonparallel and making the angle between the inner planes χ, y greater than a certain level, it is possible to prevent external light from returning to the screen 28, and this inner plane χ
, y should be specifically determined so that external light incident at any angle at all positions on the screen 28 does not return to the screen 28.

本実施例では投影画像をラインセンサ30で読取るよう
にしているが、本発明はスクリーン近傍にデジタル的に
変換する光電変換手段を設けたリーグもしくはリーグプ
リンタには全て適用できる。さらに本発明はラインセン
サを持たないミラーに投影するだけの通常のリーグに適
用したものを包含するのは勿論である。
In this embodiment, the projected image is read by the line sensor 30, but the present invention can be applied to any league or league printer provided with photoelectric conversion means for digital conversion near the screen. Furthermore, it goes without saying that the present invention may be applied to a normal league that only projects onto a mirror without a line sensor.

(発明の効果) 本発明は以上のように、スクリーン直前の最終ミラーの
入・出射光を含む平面がその直前のミラーの入・出射光
を含む平面と非平行となるように各ミラーを配置したの
で、スクリーンを通る外光がミラーにより反射されても
このスクリーンに戻ることがなく、外光が画質を悪化さ
せるおそれがなくなる。またこのスクリーンの画像をラ
インセンナ等で読取る際に、この外光が障害となること
がない。
(Effects of the Invention) As described above, the present invention arranges each mirror so that the plane containing the incident and output light of the final mirror immediately before the screen is non-parallel to the plane containing the incident and output light of the mirror immediately before it. Therefore, even if the external light passing through the screen is reflected by the mirror, it will not return to the screen, and there is no possibility that the external light will deteriorate the image quality. Further, when reading the image on this screen with a line sensor or the like, this external light does not become an obstacle.

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

第1図は本発明の一実施例の全体図、第2図はその光学
系の拡大図である。 18・・・マイクロフィルム、 24・・・ミラー、 26・・・最終ミラー、 28・・・透過型スクリーン、 a、b・・・入射光、 b、c・・・出射光、 χ、y・・・平面。 特許出願人 富士写真フィルム株式会社代 理 人 弁
理士 山 1)文 雄 (他1名) 第1図 第a図
FIG. 1 is an overall view of an embodiment of the present invention, and FIG. 2 is an enlarged view of its optical system. 18... Microfilm, 24... Mirror, 26... Final mirror, 28... Transmissive screen, a, b... Incident light, b, c... Outgoing light, χ, y. ··Plane. Patent applicant Fuji Photo Film Co., Ltd. Agent Patent attorney Yama 1) Yu Fumi (1 other person) Figure 1 Figure a

Claims (1)

【特許請求の範囲】 複数のミラーによってマイクロフィルムの拡大投影像を
透過型スクリーンに導いて結像させるマイクロフィルム
リーダにおいて、 前記スクリーンの直前の最終ミラーの入・出射光を含む
平面と、この最終ミラーの直前のミラーにおける入・出
射光を含む平面とを互いに非平行に配設し、スクリーン
を透過して前記最終ミラーに入る外光が前記各ミラーに
反射して前記スクリーンに戻らないようにしたことを特
徴とするマイクロフィルムリーダ。
[Scope of Claims] A microfilm reader that guides an enlarged projected image of a microfilm to a transmission screen to form an image using a plurality of mirrors, which comprises: The planes containing the incoming and outgoing light in the mirror immediately before the mirror are arranged non-parallel to each other so that external light that passes through the screen and enters the final mirror is not reflected by each of the mirrors and returns to the screen. A microfilm reader that is characterized by:
JP63004665A 1988-01-14 1988-01-14 Micro film reader Expired - Fee Related JPH0831946B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP63004665A JPH0831946B2 (en) 1988-01-14 1988-01-14 Micro film reader

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP63004665A JPH0831946B2 (en) 1988-01-14 1988-01-14 Micro film reader

Publications (2)

Publication Number Publication Date
JPH01181271A true JPH01181271A (en) 1989-07-19
JPH0831946B2 JPH0831946B2 (en) 1996-03-27

Family

ID=11590215

Family Applications (1)

Application Number Title Priority Date Filing Date
JP63004665A Expired - Fee Related JPH0831946B2 (en) 1988-01-14 1988-01-14 Micro film reader

Country Status (1)

Country Link
JP (1) JPH0831946B2 (en)

Also Published As

Publication number Publication date
JPH0831946B2 (en) 1996-03-27

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