JP2008180970A - Optical component with ruled line - Google Patents

Optical component with ruled line Download PDF

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JP2008180970A
JP2008180970A JP2007015065A JP2007015065A JP2008180970A JP 2008180970 A JP2008180970 A JP 2008180970A JP 2007015065 A JP2007015065 A JP 2007015065A JP 2007015065 A JP2007015065 A JP 2007015065A JP 2008180970 A JP2008180970 A JP 2008180970A
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shape
engraved
optical component
line
engraving
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JP5020647B2 (en
JP2008180970A5 (en
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Yuichi Miyoshi
裕一 三好
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Canon Inc
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Canon Inc
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Abstract

<P>PROBLEM TO BE SOLVED: To provide an optical component having a ruled line in which variance in the ruled line width or lateral asymmetry are avoided, observation quality of an indicator can be improved and the yield is not degraded. <P>SOLUTION: An optical component such as a focusing screen has a ruled line formation part comprising a ruled line 9 composed of a base part 7 and a roof shape or an assemblage of cones on the top of the base part. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、カメラのファインダーの結像位置に配されるフォーカシングスクリーン等の光学部品に関する。   The present invention relates to an optical component such as a focusing screen disposed at an imaging position of a camera finder.

一眼レフカメラのファインダーは、撮影レンズによってカメラ内に取り込まれた画像がミラーを介し光学部品、例えばフォーカシングスクリーンのマット面に結像された画像を観察している。その際マット面に刻印されている測距範囲や測光範囲等の指標である刻線を同時に観察している。   A finder of a single-lens reflex camera observes an image obtained by forming an image captured in a camera by a photographing lens on a mat surface of an optical component such as a focusing screen via a mirror. At that time, a marking line which is an index such as a distance measuring range or a photometric range marked on the mat surface is simultaneously observed.

マット面に刻印されている刻線形状は例えば特許文献１に示されている方眼形状や目盛り線の形状や、カメラカタログに載っている小判形状と丸形状の組合せなど多くの種類がある。図２に方眼形状の刻印がされた一般的なフォーカシングスクリーンの一例、図３に小判形状と丸形状を組合せた刻印がされた一般的なフォーカシングスクリーンの一例を示す。それぞれの図中の符号１は光学部品のピント板のマット面を指し、符号２は指標を示す。撮影レンズによって形成されたピント板のマット面上の物体像と共に測光範囲やセンター範囲等を示す指標２を同時にファインダー系を介してファインダーより観察できるようになっている。指標は屋根型形状や円錐形状の集合体であり、レンズ側から来る光をまげて観察者の目にとどかないようにしている。このことにより観察者は指標を黒い線として認識できる。   There are many types of engraving shapes engraved on the mat surface, such as the grid shapes and scale line shapes disclosed in Patent Document 1, and combinations of oval and round shapes listed in the camera catalog. FIG. 2 shows an example of a general focusing screen inscribed with a square shape, and FIG. 3 shows an example of a general focusing screen in which a combination of an oval shape and a round shape is engraved. Reference numeral 1 in each figure indicates the mat surface of the focusing plate of the optical component, and reference numeral 2 indicates an index. An index 2 indicating a photometric range, a center range, and the like together with an object image on a mat surface of a focusing plate formed by a photographing lens can be simultaneously observed from the viewfinder through a viewfinder system. The indicator is an aggregate of a roof shape or a cone shape, and the light coming from the lens side is turned off so as not to reach the eyes of the observer. This allows the observer to recognize the indicator as a black line.

射出成形や圧縮成形でこの刻線の加工を行う場合、金型の刻線形状は成形品と反転したＶ溝形状となる。金型への加工方法としては特許文献２に示されるようなダイヤモンドの四角錐の工具を製作し、その工具を高速回転して連続で切削加工を行うことによりＶ溝形状を得る。またその工具を高速回転して断続で切削加工を行うことにより連続した円錐形状を得られる。その他の加工方法としてはダイヤバイトの刃先の形状を刻線形状と同等にして押し付けて加工する方法や、ダイヤバイトをそろばん玉形状に加工しローラー方式で押し付け加工する方法などが知られている。
特開平０８−０５４６６６ 特開２００１−１６２４２９ 特開２００２−１１３７２１ When this engraved line is processed by injection molding or compression molding, the engraved line shape of the mold becomes a V-groove shape that is reversed from the molded product. As a method for processing the mold, a diamond pyramid tool as shown in Patent Document 2 is manufactured, and the V-groove shape is obtained by rotating the tool at a high speed and continuously cutting it. Further, a continuous conical shape can be obtained by rotating the tool at high speed and cutting intermittently. As other processing methods, there are known a method in which the shape of the cutting edge of the diamond tool is pressed and processed to be equal to the scored shape, and a method in which the diamond tool is processed into an abacus ball shape and pressed by a roller method.
JP 08-054666 JP 2001-162429 A JP 2002-113721 A

従来使用されてきたマット面は凹凸形状がランダムであり、規則性が少なかった。近年ファインダーの明るさを向上するため、特許文献３に示されている、マイクロレンズをマット面に使用したフォーカシングスクリーンが実用化されている。従来の加工法で直接屋根型形状や連続した円錐形状を形成した場合に得られる刻線形状は、刻線上に凹凸形状の一部が重なりあっていた。特に微細な凹凸形状であるマイクロレンズをマット面に使用した場合の、従来の加工方法で得られる多くの刻線形状は、図４で示される形状である。   Conventionally used mat surfaces have random irregularities and are less regular. In recent years, in order to improve the brightness of a viewfinder, a focusing screen using a microlens on a mat surface as shown in Patent Document 3 has been put into practical use. In the engraved line shape obtained when a direct roof shape or a continuous cone shape is formed by a conventional processing method, a part of the uneven shape overlaps the engraved line. In particular, when a microlens having a fine uneven shape is used on the mat surface, many engraved shapes obtained by the conventional processing method are shapes shown in FIG.

図４は図２、図３に示したＡ部の拡大図であり、（ａ）が拡大斜視図、（ｂ）が拡大平面図、（ｃ）がＢ−Ｂ´の断面を横から見た断面図である。従来のマイクロレンズを使用しないマットの形状は規則性もなく凹凸の高さも２μｍ以下と小さいため、凹凸形状が重なることによる刻線への影響が少なかった。しかし、マイクロレンズを使用したフォーカシングスクリーンのマット形状は、マイクロレンズの集まりで規則性があり、凹凸の高さも４μｍ以上と大きいため、図４（ｂ）に示すようにマットのマイクロレンズと刻線部の一部分の重なりが、規則正しく形成されてしまう。図４（ｂ）に示すグレー部３は重なり合っている部分である。重なり合っている部分はマイクロレンズの形状として残る為、マイクロレンズの性質をもつ。本来マイクロレンズが、刻線部に重なり合わなければ、光は符号４の矢印方向に曲がり観察者の目にとどくことは無い。   4A and 4B are enlarged views of the portion A shown in FIGS. 2 and 3, where FIG. 4A is an enlarged perspective view, FIG. 4B is an enlarged plan view, and FIG. 4C is a cross-sectional view taken along line B-B ′. It is sectional drawing. Since the shape of the mat that does not use the conventional microlens is not regular and the height of the unevenness is as small as 2 μm or less, the influence on the engraving due to the overlapping of the uneven shape was small. However, the mat shape of the focusing screen using microlenses is regular because of the collection of microlenses, and the height of the irregularities is as large as 4 μm or more. Therefore, as shown in FIG. Overlap of a part of the part is regularly formed. The gray part 3 shown in FIG. 4B is an overlapping part. Since the overlapping part remains as a microlens shape, it has the properties of a microlens. Originally, if the microlens does not overlap the engraved portion, the light bends in the direction of the arrow 4 and does not reach the viewer's eyes.

しかし現実には図４（ｃ）で示すように、符号６で示すマイクロレンズが、符号９で示す刻線部に重なり合っている。この重なり合う部分は、マイクロレンズの性質を持つ為、光は曲がらず符号５の矢印方向に進み観察者の目にとどいてしまう。このため刻線の太さがまばらになり、さらに左右差が発生するため均一に見えないという問題が発生している。   However, in reality, as shown in FIG. 4C, the microlens indicated by reference numeral 6 overlaps the engraved portion indicated by reference numeral 9. Since this overlapping portion has the properties of a microlens, the light does not bend and proceeds in the direction of the arrow 5 and reaches the observer's eyes. For this reason, the thickness of the engraved line becomes sparse, and further, there is a problem that the left and right difference is generated, so that it cannot be seen uniformly.

マイクロレンズは規則性があり、凹凸の高さも４μｍ以上と大きいため顕著であるが、上記の問題は、マイクロレンズに限る問題ではなく、刻線部に対して凹凸形状が重なり合う場合に発生する問題である。   The microlenses are notable because they have regularity and the height of the irregularities is as large as 4 μm or more, but the above problem is not limited to the microlenses, but occurs when the irregularities overlap the engraved part. It is.

この問題を解決できる刻線形状として例えば、図５に示す刻線形状が考えられる。尚、図５は、図４と同様に、図２、図３に示したフォーカシングスクリーンのＡ部の拡大図であり、（ａ）が拡大斜視図、（ｂ）が拡大平面図、（ｃ）がＢ−Ｂ´の断面を横から見た断面図である。   For example, the engraved line shape shown in FIG. 5 can be considered as the engraved line shape that can solve this problem. 5 is an enlarged view of a portion A of the focusing screen shown in FIGS. 2 and 3, as in FIG. 4, where (a) is an enlarged perspective view, (b) is an enlarged plan view, and (c). FIG. 3 is a cross-sectional view of a cross section taken along line B-B ′.

図５に示す刻線形状はマットの形状に左右されることなく、独立した形状である。このような刻線の加工法としては、マットの形状の加工を完了しているマット駒に刻線加工を行う方法が挙げられる。以下、図１３を用いて、図５に示すフォーカシングスクリーンの作製過程を説明する。図１３（ａ）は、マット駒作製に使用する電鋳マスター１３の概略断面図である。このような電鋳マスターの作製法は、例えば特許文献３に記載されている。まず、作製された電鋳マスター１３の刻線に該当する部分にあらかじめエンドミドルで平面加工を行う。図１３（ｂ）に平面加工を施した電鋳マスター１３を示す。次に、図１３（ｃ）に示すように、平面加工を施した電鋳マスター１３からマット駒１２を作製する。図１３（ｄ）は得られたマット駒１２を示す。得られたマット駒１２に、屋根型形状または円錐形状の集合体の切削加工を行う。切削個所は、刻線部に対応する。図１３（ｅ）に切削加工したマット駒１２を示す。その後切削加工を行ったマット駒１２を用い、図１３（ｇ）に示すように、図５で説明した凸型マイクロレンズ６を備えたフォーカシングスクリーンを成形する。尚、特許文献３の段落番号（００６８）にマット駒を用いた凸型マイクロレンズ６の製造法が示されている。   The engraved line shape shown in FIG. 5 is independent of the shape of the mat. Examples of such engraving processing methods include a method of performing engraving on a mat piece that has already been processed into a mat shape. Hereinafter, the manufacturing process of the focusing screen shown in FIG. 5 will be described with reference to FIG. Fig.13 (a) is a schematic sectional drawing of the electroforming master 13 used for mat piece production. A method for producing such an electroforming master is described in Patent Document 3, for example. First, planar processing is performed in advance on the portion corresponding to the engraving line of the produced electroformed master 13 with an end middle. FIG. 13B shows an electroformed master 13 that has been flattened. Next, as shown in FIG.13 (c), the mat | matte piece 12 is produced from the electroforming master 13 which gave the plane process. FIG. 13D shows the obtained mat piece 12. The obtained mat piece 12 is cut into a roof-shaped or conical aggregate. The cutting point corresponds to the engraved part. FIG. 13E shows the mat piece 12 that has been cut. Then, using the mat piece 12 that has been cut, a focusing screen having the convex microlens 6 described in FIG. 5 is formed as shown in FIG. In addition, the manufacturing method of the convex microlens 6 using the mat | matte piece is shown by the paragraph number (0068) of patent document 3. FIG.

しかし、電鋳加工においては、マット面の外観が安定しない為、通常は電鋳マスターを駒よりも大きめに製作し電鋳を行った後に、マット面の外観のよい部分のみを選らんで駒を切り出し、外形加工を行う必要がある。そのため、電鋳マスター１３に図１３（ｂ）のように事前に刻線部の為の平面加工を行うと、電鋳後に良品部分の選択ができない為、電鋳の歩留まりが極端に悪くなってしまう。   However, in electroforming, since the appearance of the mat surface is not stable, normally, after making an electroforming master larger than the piece and performing electroforming, only the part with good appearance on the mat surface is selected. Need to be cut out and processed for external shape. For this reason, if the electroforming master 13 is subjected to the planar processing for the engraved portion in advance as shown in FIG. 13B, the non-defective portion cannot be selected after the electroforming, so the yield of electroforming becomes extremely poor. End up.

本発明は上記の課題に鑑みてなされたものであり、刻線幅の変化や左右差を解決し、指標の観察品を向上させることが出来、また歩留まりを悪化させることなく刻線加工を施した光学部品を提供することを目的とする。   The present invention has been made in view of the above-described problems, and can solve the change in the marking line width and the difference between the left and right sides, improve the index observation product, and perform the marking process without deteriorating the yield. It is an object to provide an optical component.

上記課題を解決し、目的を達成するために、本発明は、表面に微細光学機能形状を形成した光学面上に刻線が形成されている光学部品において、刻線を形成する刻線形成部は、前記微細光学機能形状と隣接し光学面に対して垂直である境界面を有する土台部と、該土台部の上部に屋根型形状または円錐形の集合体である刻線部を有することを特徴とする。   In order to solve the above-described problems and achieve the object, the present invention provides an engraving forming unit for forming engravings in an optical component in which engravings are formed on an optical surface having a fine optical functional shape formed on the surface. Has a base portion having a boundary surface adjacent to the fine optical functional shape and perpendicular to the optical surface, and a marking portion that is a roof-shaped shape or a conical aggregate at the upper portion of the base portion. Features.

本発明でいう光学機能形状とは、屈折・回折等の光学機能を果たす凹凸形状を指し、例えばマイクロレンズがあげられる。また、微細とは、例えば１００μｍ以下のピッチで光学機能形状が配されていることを指す。従来の刻線形成部は刻線部だけから成るのに対し、本願の刻線形成部は、土台部と土台部上に形成された刻線部からなる。光学機能形状に隣接し光学面に対して垂直方向の境界面を有する土台部により、本願の刻線部は前記光学機能形状の高さよりも高い位置で、形成されている。   The optical functional shape in the present invention refers to a concave / convex shape that performs optical functions such as refraction and diffraction, and includes, for example, a microlens. The term “fine” means that the optical functional shapes are arranged at a pitch of, for example, 100 μm or less. Whereas the conventional engraving portion is composed of only the engraving portion, the engraving portion of the present application is composed of a base portion and a marking portion formed on the base portion. The engraved portion of the present application is formed at a position higher than the height of the optical functional shape by a base portion adjacent to the optical functional shape and having a boundary surface perpendicular to the optical surface.

本発明によれば、刻線形成部に土台部を設けて、該土台部に微細光学機能形状と隣接し光学面に対して垂直である境界面を形成するので、凹凸形状と刻線部の重なりを防止でき、凹凸形状に関わらず、良好な指標の観察が可能と成る。よって、表面に微細光学機能形状を形成した光学面上に刻線が形成されている光学部品において、刻線幅の変化や左右差を解決し、指標の観察品質を向上させた光学部品の提供が可能になる。   According to the present invention, a base portion is provided in the score line forming portion, and a boundary surface that is adjacent to the fine optical functional shape and is perpendicular to the optical surface is formed on the base portion. Overlap can be prevented, and good indicators can be observed regardless of the uneven shape. Therefore, in optical parts with engraved lines on the optical surface with a fine optical functional shape formed on the surface, the provision of optical parts that solves changes in engraved line width and left-right difference and improves the observation quality of indicators Is possible.

以下に本発明の実施形態例を図面に基づいて説明する。   Embodiments of the present invention will be described below with reference to the drawings.

（実施形態１）
本実施形態の刻線形態は、図２、３に示す一般的な光学部品の刻線形態と同様である。本実施形態の光学部品、例えばフォーカシングスクリーンは、例えばサイズ約３０ｍｍ×２０ｍｍのピント板で、且つマイクロレンズが半径２０〜４０μｍで規則性高くピント板のマット面上に配列されているものを使用することが可能である。尚、以下に示す図１、図６〜図８は、図２、３で示したＡ部の拡大図であり（ａ）が拡大斜視図、（ｂ）が拡大平面図、（ｃ）がＢ−Ｂ´の断面を横から見た断面図である。 (Embodiment 1)
The engraving form of this embodiment is the same as the engraving form of the general optical component shown in FIGS. The optical component of this embodiment, such as a focusing screen, is a focusing plate having a size of about 30 mm × 20 mm, for example, and a microlens having a radius of 20 to 40 μm and regularly arranged on the matting surface of the focusing plate. It is possible. 1 and 6 to 8 shown below are enlarged views of the portion A shown in FIGS. 2 and 3, wherein (a) is an enlarged perspective view, (b) is an enlarged plan view, and (c) is B. It is sectional drawing which looked at the cross section of -B 'from the side.

図１の形状は刻線形成部に符号７に示す土台部と、符号９で示す屋根形状の刻線部を併せ持つ形状であり、符号８で示す土台部の境界面の高さはマイクロレンズ個々の球面の高さよりも高い。従来の刻線形状は、刻線部だけで形成されていたが、本形状では、土台部と刻線部から成る刻線形成部により形成されている。刻線部が、マイクロレンズと重ならない為、光は符号４の矢印方向に曲がり観察者の目にとどくことは無い。   The shape of FIG. 1 is a shape having both a base portion indicated by reference numeral 7 and a roof-shaped engraved portion indicated by reference number 9 in the engraved line forming portion. Higher than the height of the sphere. The conventional engraved line shape is formed only by the engraved line part, but in the present form, it is formed by the engraved line forming part composed of the base part and the engraved line part. Since the engraved portion does not overlap the microlens, the light is bent in the direction of the arrow 4 and does not reach the observer's eyes.

この形状の加工を行うには、図１２に示す４軸以上の加工軸を持った高精度加工機に、図９に示す四角錐部と垂直部を合わせもつダイヤバイトを回転軸に取付け高速で回転させ、その反対方向の加工機のマット駒取付け部１１に加工するマット駒１２を取付け加工機の各軸を操作し刻線加工を行う。図１２中の符号１０は回転軸を示す。   In order to process this shape, a diamond tool having a quadrangular pyramid portion and a vertical portion shown in FIG. 9 is attached to a rotary shaft on a high-precision processing machine having four or more machining axes shown in FIG. The mat piece 12 to be rotated and processed into the mat piece mounting portion 11 of the processing machine in the opposite direction is operated to operate each axis of the processing machine to perform the marking process. The code | symbol 10 in FIG. 12 shows a rotating shaft.

以下、図１４を用いて、本実施形態の光学部品の作製過程を説明する。図１４（ａ）に使用する電鋳マスター１３の概略断面図を示す。図１３（ｂ）と異なり、電鋳マスター１３に平坦加工することなく、図１４（ｂ）に示すように、電鋳マスター１３からマット駒１２を作製する。その後、図１４（ｃ）に示すマット駒１２に、前記高精度加工機により切削加工を行い、図１４（ｄ）に示すマット駒１２の形状を得る。この際、図９の四角錐部と垂直部をもつダイヤバイトにより、マット駒に対する刻線形成部の刻線部と土台部に対応する切削を同時に可能としている。その後、図１４（ｅ）に示すように、切削加工を行ったマット駒１２を用い、図１４（ｆ）に示すように、図１で説明した凸型マイクロレンズ６を備えたフォーカシングスクリーンを成形する。   Hereinafter, the manufacturing process of the optical component of the present embodiment will be described with reference to FIG. The schematic sectional drawing of the electroforming master 13 used for Fig.14 (a) is shown. Unlike FIG.13 (b), the mat | matte piece 12 is produced from the electroforming master 13, as shown in FIG.14 (b), without carrying out the flat process to the electroforming master 13. As shown in FIG. Thereafter, the mat piece 12 shown in FIG. 14 (c) is cut by the high-precision machine to obtain the shape of the mat piece 12 shown in FIG. 14 (d). At this time, the diamond tool having the quadrangular pyramid portion and the vertical portion shown in FIG. 9 can simultaneously perform the cutting corresponding to the engraving portion and the base portion of the engraving forming portion with respect to the mat piece. Thereafter, as shown in FIG. 14 (e), a focusing screen having the convex microlens 6 described in FIG. 1 is formed as shown in FIG. 14 (f) using the mat piece 12 which has been cut. To do.

作製したフォーカシングスクリーンの形状は図１４（ｆ）に示すように、マイクロレンズとマイクロレンズの間に、土台部７と刻線部９からなる刻線形成部を形成する。土台部７上に刻線部９を形成する為、刻線部はマイクロレンズ６の凹凸形状の高さよりも、高い位置に形成することが可能である。結果、歩留まりを悪化することなくマイクロレンズ６と指標の刻線が干渉しない形状を得る。尚、図１４に示す形状では、刻線形成部と同じ形状の押し込み加工用バイトを形成しマット駒に押し込み加工を行うことも可能である。   As shown in FIG. 14 (f), the shape of the produced focusing screen is formed with a engraved line forming portion including a base portion 7 and an engraved portion 9 between the microlenses. Since the engraved portion 9 is formed on the base portion 7, the engraved portion can be formed at a position higher than the height of the uneven shape of the microlens 6. As a result, a shape is obtained in which the microlens 6 does not interfere with the marking line without deteriorating the yield. In addition, in the shape shown in FIG. 14, it is also possible to form a pressing tool having the same shape as the engraved line forming portion and perform the pressing process on the mat piece.

（実施形態２）
実施形態２において、フォーカシングスクリーンの凹凸形状の基本構成は実施形態１と同様であるが、その刻線形状が実施形態１と相異するものである。実施形態２の刻線形状を図６に示す。図６の形状は刻線形成部に符号７で示す土台部と、符号９で示す屋根形状の刻線部を併せ持つ形状であり、土台部の境界面はマイクロレンズ６個々の球面の高さよりも高く、刻線部の底幅Ｌ１は土台部の幅Ｌ２に対して短い。この形状でも刻線部が、マイクロレンズ６と重ならない為、光は符号４の矢印方向に曲がり観察者の目にとどくことは無い。 (Embodiment 2)
In the second embodiment, the basic configuration of the uneven shape of the focusing screen is the same as that of the first embodiment, but the engraved line shape is different from that of the first embodiment. The engraved line shape of the second embodiment is shown in FIG. The shape of FIG. 6 is a shape having both a base portion indicated by reference numeral 7 and a roof-shaped engraved portion indicated by reference number 9 in the score line forming portion, and the boundary surface of the base portion is higher than the height of each spherical surface of the micro lens 6. It is high and the bottom width L1 of the engraved portion is shorter than the width L2 of the base portion. Even in this shape, the engraved portion does not overlap the microlens 6, so that the light bends in the direction of the arrow 4 and does not reach the observer's eyes.

この形状の加工を行うには、図１２に示す４軸以上の加工軸を持った高精度加工機に、図１１に示すエンドミル用ダイヤバイトを回転軸に取付け高速で回転させ、その反対方向の加工機のマット駒取付け部に加工するマット駒を取付け、加工機の各軸を操作し刻線形成部の土台部に該当する切削を行っている。その後、図１０に示す四角錐のダイヤバイトにバイトを交換し高速で回転させ、加工機の各軸を操作し土台部に該当する切削個所にさらに切削を行い、刻線部に該当する切削を行う。   In order to perform machining of this shape, an end mill diamond tool shown in FIG. 11 is attached to a rotating shaft at a high-speed processing machine having four or more machining axes shown in FIG. A mat piece to be processed is attached to the mat piece attachment portion of the processing machine, and each axis of the processing machine is operated to perform cutting corresponding to the base portion of the score line forming portion. After that, the bite is changed to a square pyramid diamond tool shown in FIG. 10 and rotated at a high speed, and each axis of the processing machine is operated to further cut the cutting portion corresponding to the base portion, and the cutting corresponding to the scored portion is performed. Do.

図１の形状と同様にマイクロレンズとマイクロレンズの間に、土台部と刻線部からなる刻線形成部を形成する。土台部上に刻線部を形成する為、刻線部とマイクロレンズの重なりを防止することが可能である。結果、歩留まりを悪化することなくマイクロレンズと指標の刻線が干渉しない形状を得ることが可能である。   Similar to the shape of FIG. 1, a engraved line forming part composed of a base part and an engraved line part is formed between the microlenses. Since the engraved portion is formed on the base portion, it is possible to prevent the engraved portion and the microlens from overlapping. As a result, it is possible to obtain a shape in which the micro lens does not interfere with the marking lines without deteriorating the yield.

（実施形態３）
実施形態３において、フォーカシングスクリーンの凹凸形状の基本構成は実地形態１と同様であるが、その刻線形状が実施形態１と相異するものである。図７に実施形態３の刻線形状の一例を示し、図８に実施形態３の刻線形状の別例について示す。図７の刻線形状は、土台部７上に刻線部９を形成し、刻線部９は、符号１４で示す円錐形状を重ね合わせ連続させた形状である。図８の刻線形状は、図７と同様に土台部７上に、符号１４で示す円錐形状を重ね合わせ連続させた形状をもつ刻線部９を有し、刻線部の底幅Ｌ１は土台部の幅Ｌ２に対して短い。 (Embodiment 3)
In the third embodiment, the basic configuration of the uneven shape of the focusing screen is the same as that of the actual form 1, but the engraved line shape is different from that of the first embodiment. FIG. 7 shows an example of the score line shape of the third embodiment, and FIG. 8 shows another example of the score line shape of the third embodiment. The engraved line shape in FIG. 7 is formed by forming a engraved line part 9 on the base part 7, and the engraved line part 9 is a shape in which a conical shape indicated by reference numeral 14 is overlapped and continuous. The engraved line shape of FIG. 8 has the engraved line part 9 having a shape in which the conical shape indicated by reference numeral 14 is superimposed and continued on the base part 7 as in FIG. 7, and the bottom width L1 of the engraved line part is It is shorter than the width L2 of the base part.

どちらの刻線形状でも本発明の刻線の性能は得られ、刻線部が、マイクロレンズ６と重ならない為、光は符号４の矢印方向に曲がり観察者の目にとどくことは無い。   In any of the engraving shapes, the engraving performance of the present invention can be obtained, and the engraving portion does not overlap the microlens 6, so that the light bends in the direction of the arrow 4 and does not reach the observer's eyes.

さらに、実施形態３においては、先に説明した実施形態の屋根形状とは異なり、線の中心部が曲線形状となる。そのため、図７（ｂ）及び図８（ｂ）の拡大平面図に示すように、刻線の中心線は連続した点で構成される。成形時の樹脂の充填性が若干悪い場合において、屋根型形状では、レンズ側からの光が観察者にとどき白く透ける、線状の中心抜けが発生しまう恐れがある。しかし本実施形態では、刻線中心部が、連続した点なので、白く透けた光は点であり、観察者が認識することが少ないため、品位が向上する。欠点として線の太さが規則的に変化することが挙げられるが、円錐と円錐のピッチを縮めることにより観察者が認識することを少なくすることが可能である。また規則性があり、左右差がないため違和感が生じにくい。   Furthermore, in the third embodiment, unlike the roof shape of the above-described embodiment, the center of the line has a curved shape. Therefore, as shown in the enlarged plan views of FIGS. 7B and 8B, the center line of the engraving line is composed of continuous points. In the case where the resin filling property at the time of molding is slightly poor, in the roof mold shape, there is a possibility that the light from the lens side reaches the observer and is transmitted through white, and a linear center omission occurs. However, in the present embodiment, since the engraved line center is a continuous point, the light transmitted through white is a point, and the observer hardly recognizes it, so that the quality is improved. A drawback is that the thickness of the line changes regularly, but it is possible to reduce the recognition by the observer by reducing the pitch between the cones. In addition, there is regularity and there is no difference between the left and right sides, so it is difficult to feel uncomfortable.

本発明刻線の第一の実施形態である刻線の拡大図Enlarged view of the engraved line which is the first embodiment of the engraved line of the present invention 一般的な光学部品の一実施形態であるピント板の一例を示す概略図Schematic which shows an example of the focus board which is one Embodiment of a general optical component. 一般的な光学部品の一実施形態であるピント板の別例を示す概略図Schematic which shows another example of the focus board which is one Embodiment of a general optical component. 従来の刻線の形態を示す刻線の拡大図Enlarged view of engraving showing the form of conventional engraving 刻線の別形態として考えられる刻線の拡大図Enlarged view of engraving that can be considered as another form of engraving 本発明刻線の第二の実施形態である刻線の拡大図Enlarged view of the engraved line which is the second embodiment of the engraved line of the present invention 本発明刻線の第三の実施形態である刻線の一例を示す拡大図The enlarged view which shows an example of the marking which is 3rd embodiment of this invention marking 本発明刻線の第三の実施形態である刻線の別例を示す拡大図The enlarged view which shows another example of the marking which is 3rd embodiment of this invention marking バイトの一例を示した図（刻線と垂直面同時加工用）Diagram showing an example of a bite (for simultaneous machining of engraved lines and vertical surfaces) バイトの一例を示した図（刻線加工用）Illustration showing an example of a cutting tool (for engraving) バイトの一例を示した図（垂直面と平面同時加工用）Diagram showing an example of a bit (for vertical and flat surface machining) 金型を加工するための加工装置の一例を示した概略図Schematic showing an example of processing equipment for processing molds 図５で示す刻線形状を作製する過程を示す概略図Schematic showing the process of making the engraved line shape shown in FIG. 図１で示す刻線形状を作製する過程を示す概略図Schematic showing the process of producing the engraved line shape shown in FIG.

符号の説明Explanation of symbols

１ 光学部品のピント板のマット面
２ 指標
３ 光の透過部
４ 観察者にとどかない光の方向を示す矢印
５ 観察者にとどく光の方向を示す矢印
６ マイクロレンズ
７ 土台部
８ 土台部の境界面
９ 刻線部
１０ 回転軸
１１ 加工機のマット駒取付け部
１２ マット駒
１３ 電鋳マスター
Ｌ１ 刻線部の低幅
Ｌ２ 土台部の幅
１４ 円錐形状 DESCRIPTION OF SYMBOLS 1 Matt surface of focus plate of optical component 2 Index 3 Light transmission part 4 Arrow indicating direction of light not reaching observer 5 Arrow indicating direction of light reaching observer 6 Microlens 7 Base part 8 Base part boundary Surface 9 Engraved part 10 Rotating shaft 11 Mat piece mounting part of processing machine 12 Mat piece 13 Electroforming master L1 Low width of engraved part L2 Base part width 14 Conical shape

Claims (3)

表面に微細光学機能形状を形成した光学面上に刻線が形成されている光学部品において、刻線を形成する刻線形成部は、前記微細光学機能形状と隣接し光学面に対して垂直である境界面を有する土台部と、該土台部の上に屋根型形状または円錐形の集合体である刻線部と、を有することを特徴とする光学部品。   In an optical component in which engraving lines are formed on an optical surface having a fine optical functional shape formed on the surface, the engraving forming portion for forming the engraving line is adjacent to the fine optical functional shape and perpendicular to the optical surface. An optical component comprising: a base portion having a certain boundary surface; and a marking portion which is a roof-shaped shape or a conical aggregate on the base portion. 前記刻線部を形成する円錐形の集合体または屋根型形状が、前記土台部の境界面に対して接することなく形成されていることを特徴とする請求項１記載の光学部品。   The optical component according to claim 1, wherein a conical aggregate or a roof shape that forms the engraved portion is formed without being in contact with a boundary surface of the base portion. 前記光学部品がカメラのフォーカシングスクリーンであることを特徴とする請求項１または請求項２に記載の光学部品。   3. The optical component according to claim 1, wherein the optical component is a camera focusing screen.
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105549298A (en) * 2014-10-22 2016-05-04 佳能株式会社 Camera having a display member
JP2016081001A (en) * 2014-10-22 2016-05-16 キヤノン株式会社 Display member provided in finder, method for processing display member frame line mold, and camera using display member
JP2016080999A (en) * 2014-10-22 2016-05-16 キヤノン株式会社 Display member provided in finder, method for processing display member frame line mold, and camera using display member
US11119330B2 (en) 2017-06-02 2021-09-14 Nikon Corporation Reticle, reticle unit, rifle scope, and optical apparatus

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000321405A (en) * 1999-05-13 2000-11-24 Minolta Co Ltd Diffusion plate
JP2001147308A (en) * 1999-11-22 2001-05-29 Asahi Optical Co Ltd Luminous flux dividing element
JP2006099089A (en) * 2004-08-31 2006-04-13 Canon Inc Optical component and method for working metallic mold for molding the same

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000321405A (en) * 1999-05-13 2000-11-24 Minolta Co Ltd Diffusion plate
JP2001147308A (en) * 1999-11-22 2001-05-29 Asahi Optical Co Ltd Luminous flux dividing element
JP2006099089A (en) * 2004-08-31 2006-04-13 Canon Inc Optical component and method for working metallic mold for molding the same

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105549298A (en) * 2014-10-22 2016-05-04 佳能株式会社 Camera having a display member
JP2016081001A (en) * 2014-10-22 2016-05-16 キヤノン株式会社 Display member provided in finder, method for processing display member frame line mold, and camera using display member
JP2016080999A (en) * 2014-10-22 2016-05-16 キヤノン株式会社 Display member provided in finder, method for processing display member frame line mold, and camera using display member
US9442345B2 (en) 2014-10-22 2016-09-13 Canon Kabushiki Kaisha Camera having a display member
CN105549298B (en) * 2014-10-22 2018-07-27 佳能株式会社 Camera with display unit
US11119330B2 (en) 2017-06-02 2021-09-14 Nikon Corporation Reticle, reticle unit, rifle scope, and optical apparatus

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