JPS5844402A - Roof-mirror array - Google Patents

Roof-mirror array

Info

Publication number
JPS5844402A
JPS5844402A JP14343781A JP14343781A JPS5844402A JP S5844402 A JPS5844402 A JP S5844402A JP 14343781 A JP14343781 A JP 14343781A JP 14343781 A JP14343781 A JP 14343781A JP S5844402 A JPS5844402 A JP S5844402A
Authority
JP
Japan
Prior art keywords
roof
mirror
mirror array
roof mirror
reflective
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
JP14343781A
Other languages
Japanese (ja)
Inventor
Takaaki Miyashita
宮下 隆明
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.)
Ricoh Co Ltd
Original Assignee
Ricoh 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 Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP14343781A priority Critical patent/JPS5844402A/en
Publication of JPS5844402A publication Critical patent/JPS5844402A/en
Pending legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00Optical elements other than lenses
    • G02B5/04Prisms
    • G02B5/045Prism arrays

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Elements Other Than Lenses (AREA)

Abstract

PURPOSE:To form reflective surfaces of roof-mirror surfaces excellently by tapering the section of a reinforcing frame which covers both side parts of a roof-mirror. CONSTITUTION:A roof-mirror array 3 is so formed that right-angled reflective surfaces constituting valleys have their ridge part formed successively in parallel to one another, and two reflective surfaces constituting a valley, i.e. a roof- mirror surface is utilized as a couple of reflective surfaces. A frame-shaped reinforcing part 6 is provided covering both side parts of each roof-mirror, and this reinforcing part 6 is tapered in vertical section along the ridge part of the valley, as shown in the figure, so that the section is tapered inwardly, namely, a>b (conventionally a=b). Consequently, when reflective films are formed on roof-mirror surfaces, unevenness of film thickness due to hindrance to filming caused by the reinforcing part 6 is evaded, and consequently the reflective films never vary in reflectron coefficient partially.

Description

【発明の詳細な説明】 この発明は、複写機やファクシミリなどの光学装置に使
用されるダハミラーアレイに関する。
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a roof mirror array used in optical devices such as copying machines and facsimile machines.

ダハミラーアレイは、谷を構成する直角な反射面をその
稜線部が互に平行になるように連続して形成したもので
、谷を構成する二つの反射面すなわちダハミラー面が一
対の反射面として利用される。このようなダハミラーア
レイは、第1図に示すように、複数のレンズを連続して
形成したレンズアレイ1と、その前方に配置された長尺
の直角ミラー2と、レンズアレイ1の後方に配置された
ダハミラー・アレイ3とからなる結像光学系においテ使
用すレる。各レンズの配列ピッチと各ダハミラーの配列
ピッチとは等しく、各レンズの中心に各ダハミラーの谷
の稜線部が対向するように配置される。この光学系によ
る結像においては、第2図に示すように、物体4aから
の光線が直角ミラー2の一方の反射面で反射され、レン
ズ1を通った光線は、ダハミラー3によって反射されて
再びレンズ1を通シ、直角ミラー2の他方の反射面に°
反射されて正・立実像4bとして結像される。したがっ
て、従来の球面レンズを使用する光学系よシも光路長が
癌かに短縮され、コンパクトな結像装置が得られる。
A roof mirror array is a series of right-angled reflecting surfaces that form a valley so that their ridgelines are parallel to each other. used. As shown in FIG. 1, such a roof mirror array consists of a lens array 1 in which a plurality of lenses are continuously formed, a long right-angle mirror 2 arranged in front of the lens array 1, and a long right-angle mirror 2 arranged in front of the lens array 1, and a long right-angle mirror 2 arranged in front of the lens array 1, and a rear mirror array 1 that is arranged in front of the lens array 1. It is used in an imaging optical system consisting of a roof mirror array 3 arranged. The arrangement pitch of each lens is equal to the arrangement pitch of each roof mirror, and the roof mirrors are arranged so that the ridgeline of the valley of each lens faces the center of each lens. In image formation by this optical system, as shown in FIG. Through the lens 1, on the other reflective surface of the right-angle mirror 2.
It is reflected and formed as a normal upright real image 4b. Therefore, the optical path length is significantly shortened compared to a conventional optical system using a spherical lens, and a compact imaging device can be obtained.

このようなダハミラーアレイは、通常、プラスチ゛ツク
の射出成形等によって作られ、その背後に取付周鍔5を
有す・るが、成形時のヒケ等によって、その配列方向す
なわちX方向に湾曲することがある。このように湾曲す
ると、各ダハミラーにおける直角度が八〇だけ小さくな
シ、結像装置に組込んだときに、配列方向に二重像が形
成されるようになる。このため、X方向の湾曲を防ぐた
めに、第3図に示すように、各ダハミラーの両側部を覆
うように枠状の補強部6を設けることが行なわれている
。これによって、各ダハミラーの直角度が固定されるが
、従来は、その谷の稜線部に沿う断面において、第4図
に示すようK、谷の稜線長さbと山の稜線長さaとが等
しくまたはほぼ等しくすなわち補強部6の両枠が平行釦
なっている。ダハミラーアレイを製造するためには、プ
ラスチック成形後、各ダハミラー面に真空蒸着法等によ
シAtなどの反射膜を形成する必要があるが、このとき
に、補強部60両枠が平行に力っていると、この補強部
が成膜の障害になって、膜厚のむらが発生し、反射率が
部分的に変化してしまう等の欠点がある。特に、金属薄
膜形成後に、増反対コートをするために、透明多層薄膜
層を形成する場合に、影響が大きい。
Such a roof mirror array is usually made by plastic injection molding, etc., and has a mounting flange 5 behind it, but it may curve in the arrangement direction, that is, the X direction, due to sink marks during molding. There is. When curved in this way, the perpendicularity of each roof mirror is reduced by 80 degrees, and when incorporated into an imaging device, a double image is formed in the arrangement direction. Therefore, in order to prevent bending in the X direction, frame-shaped reinforcing parts 6 are provided to cover both sides of each roof mirror, as shown in FIG. This fixes the perpendicularity of each roof mirror, but conventionally, in a cross section along the ridgeline of the valley, K, the ridgeline length b of the valley and the ridgeline length a of the mountain are In other words, both frames of the reinforcing portion 6 are parallel buttons. In order to manufacture a roof mirror array, it is necessary to form a reflective film such as At on each roof mirror surface by vacuum evaporation method etc. after plastic molding. If too much force is applied, this reinforcing portion becomes an obstacle to film formation, resulting in uneven film thickness and partial changes in reflectance, among other drawbacks. In particular, the influence is large when a transparent multilayer thin film layer is formed in order to apply reverse coating after forming a metal thin film.

この発明の目的は、このような補強枠を有するダハミラ
ーアレイにおいて、反射膜形成を良好に行なうことので
きるダハミラーアレイの形状を提供することにある。こ
の発明の目的は1.第5図に示すように、補強枠の谷の
稜線部に沿う縦断面形状を外側に広いテーパ状すなわち
a ) bとすることにより達成される。このテーパは
、型の抜き勾配としても作用し、その角度は、任意に選
ぶことができるが、成形方法、成形条件、使用材料、反
射膜形成方法、有効反射面積の大きさ等を考慮して決め
ることが望ましい。ダノ・ミラーアレイ本体の成形方法
としては、射出成形法、射出圧縮成形法、圧縮成形法、
注型法などが用いられ、使用する材料としては、ポリメ
チルメタクリレート樹脂、ポリカーボネート樹脂、スチ
ロール系樹脂、ABS樹脂、As樹脂等の熱可塑性樹脂
および’PPG社製の商品名CR−39として知られる
ジエチレングリコールビスアリルカーボネート重合体や
エポキシ−樹脂などの熱硬化性樹脂等を挙げることがで
きる。
An object of the present invention is to provide a roof mirror array having such a reinforcing frame with a shape that allows a reflective film to be formed satisfactorily. The purpose of this invention is 1. As shown in FIG. 5, this is achieved by making the vertical cross-sectional shape of the reinforcing frame along the ridgeline of the valley outwardly tapered, that is, a)b. This taper also acts as a draft angle of the mold, and its angle can be selected arbitrarily, taking into account the molding method, molding conditions, materials used, reflective film formation method, size of effective reflective area, etc. It is desirable to decide. The Dano mirror array body can be molded using injection molding, injection compression molding, compression molding,
A casting method is used, and the materials used include thermoplastic resins such as polymethyl methacrylate resin, polycarbonate resin, styrene resin, ABS resin, and As resin, and the product name CR-39 manufactured by 'PPG Co., Ltd. Examples include thermosetting resins such as diethylene glycol bisallyl carbonate polymers and epoxy resins.

また、反射膜形成法としては、真空蒸着法、スパッタリ
ング法、イオンブレーティング法などが使用でき、反射
膜形成用金属としては、Al、 Au、hg、cr、N
iなどが使用できる。
Further, as the reflective film forming method, vacuum evaporation method, sputtering method, ion blating method, etc. can be used, and the reflective film forming metals include Al, Au, HG, CR, N.
i etc. can be used.

第6図から第10図までには、この発明による種々の形
状のダハミラーアレイの正面図とその縦断面図が示され
ている。各断面図に明らかなようK、いずれの場合も、
両側の補強枠6が外側に向うテーパ状になっている。第
6図に示す形状は、補強枠6が各ダハミラー全体を覆っ
ておシ、第7図に示す形状は、補強枠6が各ダバミラー
の谷の稜線部付近を覆い、補強枠6による反射膜形成時
の悪影響を一層防止するように工夫がなされている。第
8図に示す形状は、第6図に示す各ダノ・ミラーの肉厚
を等しくするように変更して、プラスチック成形時のヒ
ケによる悪影響を防止したものであり、第9図は、第7
図の形状に同様な工夫を施したものである。第10図に
示す形状は、第8図に示す形状から、取付用鍔部5の位
置を中央部に変更して、両側を#1ぼ同一形状とし、プ
ラスチック成形時の湾曲を一層防止するようにしたもの
である。この発明は、この他にも種々に変形可能であり
、特許請求の範囲に示したこの発明の思想の範囲内の変
形は、すべてこの発明に含まれるものである。
6 to 10 show front views and longitudinal sectional views of roof mirror arrays of various shapes according to the present invention. As is clear from each cross-sectional view, K, in both cases,
The reinforcing frames 6 on both sides are tapered outward. In the shape shown in FIG. 6, the reinforcing frame 6 covers the whole of each roof mirror, and in the shape shown in FIG. Efforts have been made to further prevent adverse effects during formation. The shape shown in Fig. 8 was changed to equalize the wall thickness of each Dano mirror shown in Fig. 6 to prevent the adverse effects of sink marks during plastic molding, and Fig. 9 shows the shape of the 7th mirror shown in Fig. 6.
The shape of the figure has been modified in a similar way. The shape shown in Fig. 10 is different from the shape shown in Fig. 8 by changing the position of the mounting flange 5 to the center and making both sides approximately the same shape as #1, to further prevent curvature during plastic molding. This is what I did. This invention can be modified in various other ways, and all modifications within the scope of the idea of this invention as shown in the claims are included in this invention.

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

第1図は、この発明が適用される結像装置の概略を示す
図、第2図は、第1図に示す装置の結像光線図、第3図
は、従来の補強枠付ダハミラーアレイの一例を示す図、
第4図は第3図の■−mV線に沿って切断した断面図、
第5図は、この発明によるダハミラーアレイにおゆる第
4図と同様な断面図、第6図から第10図は、この発明
による異なるダハミラーアレイの正面図と断面図である
。 1・・・レンズアレイ 2・・・直角ミラー 3・・・
タノーミラーアレイ 4a・・・物体 4b・・・像 
5・・・取付周鍔6・・・補強枠 墨7Z 施6因 布9因 汽(0図 =7
FIG. 1 is a diagram schematically showing an imaging device to which the present invention is applied, FIG. 2 is an imaging ray diagram of the device shown in FIG. 1, and FIG. 3 is a conventional roof mirror array with a reinforcing frame. A diagram showing an example of
Figure 4 is a cross-sectional view taken along the ■-mV line in Figure 3;
FIG. 5 is a sectional view similar to FIG. 4 of a roof mirror array according to the present invention, and FIGS. 6 to 10 are a front view and a sectional view of different roof mirror arrays according to the present invention. 1... Lens array 2... Right angle mirror 3...
Tanoh mirror array 4a...object 4b...image
5...Mounting flange 6...Reinforcement frame ink 7Z 6in cloth 9inki (0 figure = 7

Claims (1)

【特許請求の範囲】[Claims] 谷を構成する直角な二つの反射面をその稜線部が互に平
行になるように連続して形成したダハミラーアレイであ
って、各ダハミラーの両側部を覆う補強枠を有し、この
補強枠の前記稜線部に沿う縦断面形状が外側に広がるテ
ーバ状をなすダハミラーアレイ。
A roof mirror array in which two right-angled reflecting surfaces constituting a valley are successively formed so that their ridge lines are parallel to each other, and has a reinforcing frame that covers both sides of each roof mirror, and the reinforcing frame A roof mirror array in which a vertical cross-sectional shape along the ridgeline portion of the roof mirror array has a tapered shape that expands outward.
JP14343781A 1981-09-11 1981-09-11 Roof-mirror array Pending JPS5844402A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14343781A JPS5844402A (en) 1981-09-11 1981-09-11 Roof-mirror array

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14343781A JPS5844402A (en) 1981-09-11 1981-09-11 Roof-mirror array

Publications (1)

Publication Number Publication Date
JPS5844402A true JPS5844402A (en) 1983-03-15

Family

ID=15338679

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14343781A Pending JPS5844402A (en) 1981-09-11 1981-09-11 Roof-mirror array

Country Status (1)

Country Link
JP (1) JPS5844402A (en)

Similar Documents

Publication Publication Date Title
TWI768696B (en) Light-folding element for camera module, camera module and electronic device
JPS62157023A (en) Background projection screen and manufacture thereof
JPS5913005B2 (en) Camera body structure
JP3444454B2 (en) Wide-angle lens
US20220187513A1 (en) Compound prism module and image acquisition module
US6637899B2 (en) Optical element and optical system having the same
JPS5844402A (en) Roof-mirror array
US11846791B2 (en) Compound prism module and image acquisition module
US20220128796A1 (en) Small lens system for tof
JP3311281B2 (en) Mold for forming free-form surface prism
JP3341223B2 (en) Lens sheet for transmission screen
JPH10186105A (en) Lens array
US5041854A (en) View finder in single-lens reflex camera
US5946147A (en) Roof prism
JPH1123806A (en) Finder lens
JP2021162825A (en) Optical element, imaging apparatus, and mobile body
JPS5929201A (en) Pentagonal prism having fresnel lens or the like
JPH07104161A (en) Lens unit and camera formed by using this lens unit
JPH0238936B2 (en)
US5335034A (en) Zoom viewfinder with non-rectangular window
US3024691A (en) Photographic viewfinder of the albadanewton type
JPS5844416A (en) Optical image forming device
JPH01291211A (en) Unmagnification image forming element and its manufacture
JP3170540B2 (en) Finder device
TW202422149A (en) Optical path folding element, imaging lens module and electronic device