JP5762110B2

JP5762110B2 - Lightweight mirror

Info

Publication number: JP5762110B2
Application number: JP2011096774A
Authority: JP
Inventors: 泰介遠藤; さおり坂元; 正剛内藤; 将司酒井
Original assignee: Mitsubishi Electric Corp
Current assignee: Mitsubishi Electric Corp
Priority date: 2011-04-25
Filing date: 2011-04-25
Publication date: 2015-08-12
Anticipated expiration: 2031-04-25
Also published as: JP2012230149A

Description

この発明は、軽量化を施した光学ミラー（以下、軽量化ミラーとも称する）に関する。 The present invention relates to a weight-reduced optical mirror (hereinafter also referred to as a weight-reduced mirror).

軽量化ミラーは、凹穴が設けられた本体プレート（以下、ミラー構成体、コアとも称する）を用いたものが知られている。この軽量化ミラーは、本体プレート（コア）の凹穴の開口部それぞれに個片プレートを接合し、個片プレートにより補強されて構成される。本体プレート（コア）に形成された凹穴の周囲は、個片プレートの取り付け面から立設したリブ壁によって囲まれたリブ構造をなしている。また、個片プレートの材料は、本体プレート（ミラー構成体）を構成するガラス材料と同一または同等の線膨張係数を有する材料としている（例えば、特許文献１参照）。
一方で、製造面の課題（例えば、リブ壁の機械加工性）が有る。 As a light weight mirror, a mirror using a body plate (hereinafter also referred to as a mirror structure or a core) provided with a recessed hole is known. This light weight mirror is configured by joining individual plates to the respective openings of the recessed holes of the main body plate (core) and reinforcing them with the individual plates. The periphery of the recessed hole formed in the main body plate (core) has a rib structure surrounded by a rib wall erected from the mounting surface of the individual plate. The material of the individual plate is a material having the same or equivalent linear expansion coefficient as that of the glass material constituting the main body plate (mirror structure) (for example, see Patent Document 1).
On the other hand, there are manufacturing issues (for example, machinability of rib walls).

特開２００２−１８２０１８号公報Japanese Patent Laid-Open No. 2002-182018

この発明は、例えば、光学ミラーを大型化かつ軽量化する際に、製造が容易で、かつ、所要の強度及び剛性を確保する構造を得ることを目的とする。 An object of the present invention is, for example, to obtain a structure that is easy to manufacture and has required strength and rigidity when the optical mirror is enlarged and reduced in weight.

この発明に係る軽量化ミラーは、
鏡が形成された一方の面である表面と、他方の面である裏面とを有する板状の本体プレートと、
前記本体プレートの前記裏面と接合する接合面と、他方の面である接合裏面とを有する板状のバックプレートと
を備え、
前記バックプレートは、
前記接合面を介して前記本体プレートの裏面に接合することで、前記本体プレートに対して積層する状態を成し、
前記接合面と前記接合裏面との少なくともいずれかに複数の開口部が形成され、
前記複数の開口部のそれぞれから、前記開口部が形成された面に対し、略直角の側面を有する前記積層の方向に凹んだ、底板を有する凹穴が形成され、
２つの前記凹穴から成り、互いの側面から成る共通の壁であるリブ壁で隔てられた互いに隣接する前記２つの凹穴から成る凹穴隣接ペアが複数形成され、
前記リブ壁から成るリブ形状部を有することを特徴とする。 The lightweight mirror according to this invention is
A plate-shaped main body plate having a surface that is one surface on which a mirror is formed and a back surface that is the other surface;
A plate-shaped back plate having a bonding surface to be bonded to the back surface of the main body plate and a bonding back surface that is the other surface;
The back plate is
By joining to the back surface of the main body plate via the joint surface, a state of stacking on the main body plate is formed,
A plurality of openings are formed in at least one of the bonding surface and the bonding back surface,
From each of the plurality of openings, a recessed hole having a bottom plate is formed, which is recessed in the direction of the lamination having side surfaces substantially perpendicular to the surface on which the opening is formed.
A plurality of adjacent adjacent pairs of concave holes, each consisting of the two concave holes, which are adjacent to each other and separated by a rib wall that is a common wall composed of the two side surfaces,
It has the rib-shaped part which consists of the said rib wall, It is characterized by the above-mentioned.

この発明に係る軽量化ミラーは、例えば、光学ミラーを大型化かつ軽量化する際に、製造が容易で、かつ、所要の強度及び剛性を確保する構造を得ることを可能とする。 For example, when the optical mirror is enlarged and reduced in weight, the lightweight mirror according to the present invention can be easily manufactured and can obtain a structure that ensures required strength and rigidity.

実施の形態１を示す図で、軽量化ミラー１００の鏡面２０５を示す平面図。FIG. 3 shows the first embodiment and is a plan view showing a mirror surface 205 of the lightening mirror 100. 実施の形態１を示す図で、軽量化ミラー１００を示す断面斜視図。FIG. 5 is a cross-sectional perspective view showing the lightening mirror 100, showing the first embodiment. 実施の形態１を示す図で、本体プレート２００とバックプレート３００との接合前の軽量化ミラー１００を示す断面斜視図。FIG. 5 shows the first embodiment, and is a cross-sectional perspective view showing the lightening mirror 100 before the main body plate 200 and the back plate 300 are joined. 実施の形態１を示す図で、軽量化ミラー１００を示す断面図。FIG. 3 shows the first embodiment and is a cross-sectional view showing a lightening mirror 100. 実施の形態１を示す図で、従来の軽量化ミラー１００の例を示す断面斜視図。FIG. 5 is a cross-sectional perspective view showing an example of a conventional lightening mirror 100, showing the first embodiment. 実施の形態２を示す図で、軽量化ミラー１００を示す断面斜視図。FIG. 9 is a cross-sectional perspective view showing a lightening mirror 100, showing Embodiment 2. 実施の形態２を示す図で、軽量化ミラー１００を示す断面図。FIG. 5 shows the second embodiment and is a cross-sectional view showing a lightening mirror 100. 実施の形態３を示す図で、支持器が取り付けられた軽量化ミラー１００の例を示す断面図。It is a figure which shows Embodiment 3, and is sectional drawing which shows the example of the weight reduction mirror 100 to which the supporter was attached. 実施の形態３を示す図で、支持部を有する軽量化ミラー１００の例を示す断面斜視図。FIG. 10 is a diagram showing the third embodiment, and is a cross-sectional perspective view showing an example of a lightening mirror 100 having a support portion. 実施の形態４を示す図で、荷重パスを分散させる軽量化ミラー１００の例を示す断面図。FIG. 10 shows the fourth embodiment, and is a cross-sectional view showing an example of a lightening mirror 100 that disperses a load path. 実施の形態４を示す図で、荷重パスを分散させる軽量化ミラー１００の例を示す斜視図。FIG. 10 is a diagram showing the fourth embodiment, and is a perspective view showing an example of a lightening mirror 100 that disperses a load path. 実施の形態４を示す図で、荷重パスを分散させる軽量化ミラー１００の他の例を示す断面図。FIG. 10 is a diagram illustrating the fourth embodiment, and is a cross-sectional view illustrating another example of the lightening mirror 100 that disperses a load path.

実施の形態１．
実施の形態１について、図１〜図５を用いて説明する。 Embodiment 1 FIG.
The first embodiment will be described with reference to FIGS.

図１は、軽量化ミラー１００の鏡面２０５を示す平面図である。
軽量化ミラー１００は、本体プレート２００の一方の面である表面２０６に鏡面２０５が形成されている。以降表面２０６を鏡面２０５と言い換えて説明する。
本体プレート２００は、板状の部材である。本体プレート２００は、熱変形の抑制された低膨張ガラスセラミックスを主成分とする、例えば、円形プレート素材から成る。ただし、本体プレート２００の形状は円形に限定されるものでは無い。
鏡面２０５は、本体プレート２００に鏡面研削または研磨加工を施すことによって、所望の鏡面精度が得られるように形成される。 FIG. 1 is a plan view showing a mirror surface 205 of the lightening mirror 100.
The light weight mirror 100 has a mirror surface 205 formed on a surface 206 which is one surface of the main body plate 200. Hereinafter, the surface 206 will be described as the mirror surface 205.
The main body plate 200 is a plate-like member. The main body plate 200 is made of, for example, a circular plate material whose main component is a low expansion glass ceramic whose thermal deformation is suppressed. However, the shape of the main body plate 200 is not limited to a circular shape.
The mirror surface 205 is formed so as to obtain desired mirror surface accuracy by subjecting the main body plate 200 to mirror grinding or polishing.

また、軽量化ミラー１００は、中央に貫通穴２０３を有する。この貫通穴２０３は、例えば、軽量化ミラー１００が凹レンズであり、他の凸レンズと組み合わせて望遠鏡を形成した場合などの光路となる。この貫通穴２０３は、実施の形態１〜４において、実施の形態がもたらす効果とは無関係である。従って、貫通穴２０３は、有っても無くても良い。 The lightening mirror 100 has a through hole 203 at the center. For example, the through-hole 203 serves as an optical path when the weight reduction mirror 100 is a concave lens and a telescope is formed in combination with another convex lens. This through hole 203 is irrelevant to the effect brought about by the embodiment in the first to fourth embodiments. Therefore, the through hole 203 may or may not be provided.

図２は、軽量化ミラー１００を示す断面斜視図である。
図２を含め、以降、実施の形態１〜４の説明に用いる断面図および断面斜視図は、図１のＡ−Ａ断面を示すものである。
図３は、本体プレート２００とバックプレート３００との接合前の軽量化ミラー１００を示す断面斜視図である。
図４は、軽量化ミラー１００を示す断面図である。 FIG. 2 is a cross-sectional perspective view showing the lightening mirror 100.
The cross-sectional view and cross-sectional perspective view used for the description of the first to fourth embodiments, including FIG. 2, hereinafter show the AA cross-section of FIG.
FIG. 3 is a cross-sectional perspective view showing the lightening mirror 100 before the main body plate 200 and the back plate 300 are joined.
FIG. 4 is a cross-sectional view showing the lightening mirror 100.

また、図２に示すように、リブ壁３０８（後述する）もしくは本体リブ壁２０４（後述する）同士が集結する集結部７００（後述する）は、軽量化の為に円筒状の中空部５００となっている。しかし、この中空部５００は、実施の形態１〜４において、実施の形態がもたらす効果とは無関係である。従って、中空部５００は、有っても無くても良い。また、以降、実施の形態１〜４の説明に用いる断面図は、この中空部５００を省略して図示している。 Further, as shown in FIG. 2, a gathering portion 700 (described later) where rib walls 308 (described later) or main body rib walls 204 (described later) gather together is formed with a cylindrical hollow portion 500 for weight reduction. It has become. However, this hollow part 500 is irrelevant to the effects brought about by the embodiments in the first to fourth embodiments. Therefore, the hollow portion 500 may or may not be present. Further, hereinafter, in the cross-sectional views used for describing the first to fourth embodiments, the hollow portion 500 is omitted.

軽量化ミラー１００は、図３に示すような本体プレート２００と、バックプレート３００とが接合される。そして、図２のようにバックプレート３００は、本体プレート２００に積層する状態となる。 In the light weight mirror 100, a main body plate 200 and a back plate 300 as shown in FIG. As shown in FIG. 2, the back plate 300 is stacked on the main body plate 200.

なお、バックプレート３００も、本体プレート２００と同様に貫通穴３０３を有する。しかし、この貫通穴３０３も、実施の形態１〜４において、実施の形態がもたらす効果とは無関係である。従って、貫通穴３０３は、有っても無くても良い。
なお、本体プレート２００の貫通穴２０３が存在する場合は、図２のように本体プレート２００は、貫通穴２０３を形成する本体内周壁５４０を有する。本体内周壁５４０は、図３に示す２つの黒枠を断面とし、貫通穴２０３を１周する略円筒状である。ただし、本体内周壁５４０の形状は略円筒状に限られない。
そして、バックプレート３００に貫通穴３０３が存在する場合は、バックプレート３００は、貫通穴３０３を形成する内周壁５３０を有する。内周壁５３０は、図３に示す２つの黒枠を断面とし、貫通穴３０３を１周する略円筒状である。ただし、内周壁５３０の形状は略円筒状に限られない。 Note that the back plate 300 also has a through hole 303 in the same manner as the main body plate 200. However, this through hole 303 is also irrelevant to the effects brought about by the embodiments in the first to fourth embodiments. Therefore, the through hole 303 may or may not be provided.
When the through hole 203 of the main body plate 200 exists, the main body plate 200 has a main body inner peripheral wall 540 that forms the through hole 203 as shown in FIG. The body peripheral wall 540 has a substantially cylindrical shape with the two black frames shown in FIG. However, the shape of the main body inner peripheral wall 540 is not limited to a substantially cylindrical shape.
When the through hole 303 exists in the back plate 300, the back plate 300 has an inner peripheral wall 530 that forms the through hole 303. The inner peripheral wall 530 has a substantially cylindrical shape with the two black frames shown in FIG. However, the shape of the inner peripheral wall 530 is not limited to a substantially cylindrical shape.

図３に示すように、バックプレート３００も、板状の部材である。バックプレート３００も、本体プレート２００と同様に、熱変形の抑制された低膨張ガラスセラミックスを主成分とする、例えば円形プレート素材から成る。ただし、バックプレート３００の形状は円形に限定されるものでは無い。
バックプレート３００は、無機接着剤による接着やガラス融着によって本体プレート２００に接合される。このとき、接合強度を上げるため、本体プレート２００とバックプレート３００との接着面４００（図２、図４）は、接合方法に応じた平面度、面粗度に加工されることが好ましい。 As shown in FIG. 3, the back plate 300 is also a plate-like member. Similarly to the main body plate 200, the back plate 300 is also made of, for example, a circular plate material whose main component is low expansion glass ceramics with suppressed thermal deformation. However, the shape of the back plate 300 is not limited to a circle.
The back plate 300 is joined to the main body plate 200 by adhesion with an inorganic adhesive or glass fusion. At this time, in order to increase the bonding strength, the bonding surface 400 (FIGS. 2 and 4) between the main body plate 200 and the back plate 300 is preferably processed to have a flatness and a surface roughness according to the bonding method.

ここで、本体プレート２００とバックプレート３００との接着面４００（図２、図４）は、本体プレート２００の鏡面２０５とは他方の面である裏面２５０（図３）と、バックプレート３００の接合面３５０（図３）とから成る。なお、バックプレート３００の接合面３５０とは他方の面を、接合裏面３５５と称する。更に、本体プレート２００の外周を成す側面を本体側面６１０、バックプレート３００の外周を成す側面をバックプレート側面６２０と称する。バックプレート側面６２０は、接合面３５０と接合裏面３５５とから成る板状のバックプレート３００の厚さ方向の側面とも言える。 Here, the bonding surface 400 (FIGS. 2 and 4) between the main body plate 200 and the back plate 300 is a bonding between the back surface 250 (FIG. 3) that is the other surface of the mirror surface 205 of the main body plate 200 and the back plate 300. It consists of a surface 350 (FIG. 3). The other side of the joining surface 350 of the back plate 300 is referred to as a joining back surface 355. Further, a side surface forming the outer periphery of the main body plate 200 is referred to as a main body side surface 610, and a side surface forming the outer periphery of the back plate 300 is referred to as a back plate side surface 620. The back plate side surface 620 can also be said to be a side surface in the thickness direction of the plate-like back plate 300 composed of the bonding surface 350 and the bonding back surface 355.

本体プレート２００の裏面２５０（図３）は、本体リブ壁２０４と本体外周壁５１０とで形成される格子状の面を示す。ここで、図３に示す点線の丸部分が一つの本体リブ壁２０４を示す。また、本体外周壁５１０は、図３に示す２つの黒枠を断面とし、本体プレート２００の外周を１周する略円筒状である。ただし、本体外周壁５１０の形状は略円筒状に限られない。
バックプレート３００の接合面３５０（図３）と接合裏面３５５とは、リブ壁３０８と外周壁５２０とで形成される格子状の面を示す。ここで、図３に示す２つの点線の丸部分それぞれが、それぞれ一つずつのリブ壁３０８ａとリブ壁３０８ｂとを示す。また、外周壁５２０は、図３に示す２つの黒枠を断面とし、本体プレート２００の外周を１周する略円筒状である。ただし、外周壁５２０の形状は略円筒状に限られない。
更に、本体側面６１０は、本体外周壁５１０の壁面から成り、バックプレート側面６２０は、外周壁５２０の壁面から成る。 A back surface 250 (FIG. 3) of the main body plate 200 indicates a lattice-like surface formed by the main body rib wall 204 and the main body outer peripheral wall 510. Here, the dotted-line circle portion shown in FIG. Further, the main body outer peripheral wall 510 has a substantially cylindrical shape with the two black frames shown in FIG. However, the shape of the main body outer peripheral wall 510 is not limited to a substantially cylindrical shape.
The joining surface 350 (FIG. 3) and the joining back surface 355 of the back plate 300 indicate lattice-like surfaces formed by the rib wall 308 and the outer peripheral wall 520. Here, each of the two dotted dotted circles shown in FIG. 3 represents one rib wall 308a and one rib wall 308b. Further, the outer peripheral wall 520 has a substantially cylindrical shape with the two black frames shown in FIG. However, the shape of the outer peripheral wall 520 is not limited to a substantially cylindrical shape.
Further, the main body side surface 610 is formed of a wall surface of the main body outer peripheral wall 510, and the back plate side surface 620 is formed of a wall surface of the outer peripheral wall 520.

本体プレート２００の裏面２５０（図３）と、バックプレート３００の接合面３５０（図３）と接合裏面３５５とには、複数の略正三角形の開口部が形成されている。 A plurality of substantially equilateral triangular openings are formed in the back surface 250 (FIG. 3) of the main body plate 200, the bonding surface 350 (FIG. 3), and the bonding back surface 355 of the back plate 300.

そして、複数の開口部のそれぞれから、開口部が形成された面（本体プレート２００の裏面２５０、バックプレート３００の接合面３５０と接合裏面３５５）に対し、略直角の側面を有する凹穴（後述の本体凹穴２１０、第１凹穴３１０、第２凹穴３１１）が形成されている。この凹穴により、本体プレート２００とバックプレート３００の質量が減らされ、軽量化されている。
この凹穴は、バックプレート３００が本体プレート２００に対して積層する方向に凹んだ、底板３０９を有する凹穴である。バックプレート３００が本体プレート２００に対して積層する方向とは、裏面２５０、接合面、接合裏面３５５のそれぞれに対して略直角の方向であるとも言える。 Then, from each of the plurality of openings, a recessed hole having a side surface substantially perpendicular to the surface on which the openings are formed (the back surface 250 of the main body plate 200, the bonding surface 350 and the bonding back surface 355 of the back plate 300) (described later). Main body concave hole 210, first concave hole 310, and second concave hole 311). Due to this concave hole, the mass of the main body plate 200 and the back plate 300 is reduced, and the weight is reduced.
This recessed hole is a recessed hole having a bottom plate 309 that is recessed in the direction in which the back plate 300 is laminated with respect to the main body plate 200. It can be said that the direction in which the back plate 300 is stacked on the main body plate 200 is a direction substantially perpendicular to the back surface 250, the bonding surface, and the bonding back surface 355.

すなわち、図３，図４に示すように、本体プレート２００の裏面２５０には、複数の本体開口部２６０（図３、図４）が形成され、複数の本体開口部２６０のそれぞれから、裏面２５０に対し、略直角の側面を有する裏面２５０から鏡面２０５（表面２０６）に凹んだ本体凹穴２１０が形成される。 That is, as shown in FIGS. 3 and 4, a plurality of body openings 260 (FIGS. 3 and 4) are formed on the back surface 250 of the body plate 200, and the back surface 250 is formed from each of the plurality of body openings 260. On the other hand, a main body recessed hole 210 that is recessed from the back surface 250 having a substantially right side surface to the mirror surface 205 (surface 206) is formed.

そして、バックプレート３００の接合面３５０（図３）と接合裏面３５５とには、複数の開口部３６０が形成される。更に、接合面３５０（図３）の複数の開口部３６０ａ（図３）から第１凹穴３１０がそれぞれ形成され、接合裏面３５５の複数の開口部３６０ｂ（図３）から第２凹穴３１１がそれぞれ形成される。 A plurality of openings 360 are formed in the joining surface 350 (FIG. 3) and the joining back surface 355 of the back plate 300. Further, first concave holes 310 are formed from the plurality of openings 360a (FIG. 3) of the joint surface 350 (FIG. 3), and second concave holes 311 are formed from the plurality of openings 360b (FIG. 3) of the joint back surface 355. Each is formed.

バックプレート３００の第１凹穴３１０と第２凹穴３１１とは、接合面３５０（図３）と接合裏面３５５とをバックプレート３００が本体プレート２００に対して積層する方向の一方の方向から透過して見た場合、それぞれの開口部３６０ａ（図３、図４）と開口部３６０ｂ（図３、図４）とは略同じ位置に形成される。ここで、接合面３５０（図３）と接合裏面３５５とをバックプレート３００が本体プレート２００に対して積層する方向の一方の方向から透過して見た場合とは、すなわち、例えば、図２に示すように矢印Ｘの方向から透過して見た場合である。
そして、略同じ位置に形成された開口部３６０ａ（図３、図４）と開口部３６０ｂ（図３、図４）のそれぞれから形成される第１凹穴３１０と第２凹穴３１１とは一対の凹穴ペアを構成する。
第１凹穴３１０と第２凹穴３１１との凹穴ペアは、互いの底面を両面とする底板３０９を有する。図４の黒枠で囲った部分が、一つの底板３０９である。 The first concave hole 310 and the second concave hole 311 of the back plate 300 are transmitted from one direction in which the back plate 300 is laminated on the main body plate 200 with the joint surface 350 (FIG. 3) and the joint back surface 355. Thus, each opening 360a (FIGS. 3 and 4) and opening 360b (FIGS. 3 and 4) are formed at substantially the same position. Here, the case where the joining surface 350 (FIG. 3) and the joining back surface 355 are seen from one direction of the direction in which the back plate 300 is laminated on the main body plate 200 is seen, for example, in FIG. This is a case of seeing through from the direction of arrow X as shown.
A pair of the first concave hole 310 and the second concave hole 311 formed from the opening 360a (FIGS. 3 and 4) and the opening 360b (FIGS. 3 and 4) formed at substantially the same position, respectively. Of a pair of concave holes.
The pair of concave holes of the first concave hole 310 and the second concave hole 311 has a bottom plate 309 whose both surfaces are the bottom surfaces. A portion surrounded by a black frame in FIG. 4 is one bottom plate 309.

そして、図４に示すように複数の底板３０９からなる板状を底板プレート７１０と称する。（図が分かりづらくなる為、図４の「Ｉ」部分のみ底板プレート７１０を図示するが、図４の「II」部分についても同様である。）
底板プレート７１０は、図３に示す２つの黒枠を断面とし、一枚の略円板状である。ただし、底板プレート７１０の形状は略円板状に限られない。 Then, as shown in FIG. 4, a plate shape composed of a plurality of bottom plates 309 is referred to as a bottom plate 710. (Because it becomes difficult to understand the figure, only the “I” portion of FIG. 4 shows the bottom plate 710, but the same applies to the “II” portion of FIG. 4.)
The bottom plate 710 has a cross section of two black frames shown in FIG. However, the shape of the bottom plate 710 is not limited to a substantially disc shape.

また、鏡面２０５が形成された部分を鏡面プレート７２０と称する。鏡面プレート７２０は、図３に示す２つの黒枠を断面とし、一枚の略円板状である。ただし、鏡面プレート７２０の形状は略円板状に限られない。 A portion where the mirror surface 205 is formed is referred to as a mirror plate 720. The mirror plate 720 has a cross section of two black frames shown in FIG. 3 and has a substantially disk shape. However, the shape of the mirror surface plate 720 is not limited to a substantially disk shape.

本体プレート２００は、本体プレート２００の本体側面６１０を成す本体外周壁５１０を有する。本体外周壁５１０は、本体プレート２００の外周に位置する本体凹穴２１０の側壁であるとも言える。
バックプレート３００は、バックプレート３００のバックプレート側面６２０を成す外周壁５２０を有する。外周壁５２０は、バックプレート３００の外周に位置する第１凹穴３１０と第２凹穴３１１との側壁であるとも言える。 The main body plate 200 has a main body outer peripheral wall 510 that forms a main body side surface 610 of the main body plate 200. It can be said that the main body outer peripheral wall 510 is a side wall of the main body concave hole 210 located on the outer periphery of the main body plate 200.
The back plate 300 has an outer peripheral wall 520 that forms the back plate side surface 620 of the back plate 300. It can be said that the outer peripheral wall 520 is a side wall of the first concave hole 310 and the second concave hole 311 located on the outer periphery of the back plate 300.

本体プレート２００は、互いに隣接する本体開口部２６０のそれぞれから形成される互いに隣接する本体凹穴２１０である本体凹穴隣接ペア（例えば図３に示す本体凹穴２１０ａと本体凹穴２１０ｂ）を隔てる壁であり、本体凹穴隣接ペア（例えば図３に示す本体凹穴２１０ａと本体凹穴２１０ｂ）のそれぞれの側面を壁面とする本体リブ壁２０４を有する。
そして、本体プレート２００は、複数の本体リブ壁２０４から成る本体リブ形状部２１４（図４）を有する。 The main body plate 200 separates main body concave hole adjacent pairs (for example, the main body concave hole 210a and the main body concave hole 210b shown in FIG. 3), which are adjacent main body concave holes 210 formed from the respective main body opening portions 260 adjacent to each other. It is a wall, and has a main body rib wall 204 with the side surfaces of the main body concave hole adjacent pairs (for example, the main body concave hole 210a and the main body concave hole 210b shown in FIG. 3) as wall surfaces.
The main body plate 200 has a main body rib-shaped portion 214 (FIG. 4) composed of a plurality of main body rib walls 204.

バックプレート３００は、２つの凹穴から成り、互いの側面から成る共通の壁であるリブ壁３０８で隔てられた互いに隣接する２つの凹穴から成る凹穴隣接ペア（詳細は後述する）が複数形成される。
そして、バックプレート３００は、複数のリブ壁３０８から成るリブ形状部（第１リブ形状部３１５ａと第２リブ形状部３１５ｂ）を有する。 The back plate 300 is composed of two concave holes, and a plurality of adjacent pairs of concave holes (details will be described later) consisting of two concave holes adjacent to each other separated by a rib wall 308 that is a common wall composed of side surfaces. It is formed.
The back plate 300 includes rib-shaped portions (a first rib-shaped portion 315a and a second rib-shaped portion 315b) including a plurality of rib walls 308.

実施の形態１においては、バックプレート３００は、互いに隣接する第１凹穴３１０の開口部から形成される凹穴隣接ペア（例えば図３に示す第１凹穴３１０ａと第１凹穴３１０ｂ）のそれぞれの側面を壁面とし、第１凹穴３１０の底面から接合面３５０までの高さを有するリブ壁３０８ａを有する。図４の黒枠で囲った部分が、一つのリブ壁３０８ａである。
また、バックプレート３００は、互いに隣接する第２凹穴３１１の開口部から形成される凹穴隣接ペア（例えば図３に示す第２凹穴３１１ａと第２凹穴３１１ｂ）のそれぞれの側面を壁面とし、第２凹穴３１１の底面から接合裏面３５５までの高さを有するリブ壁３０８ｂを有する。図４の黒枠で囲った部分が、一つのリブ壁３０８ｂである。
そして、リブ形状部３１５は、複数のリブ壁３０８ａから成る第１リブ形状部３１５ａと複数のリブ壁３０８ｂから成る第２リブ形状部３１５ｂとを有する。 In the first embodiment, the back plate 300 includes a pair of adjacent concave holes (for example, the first concave hole 310a and the first concave hole 310b shown in FIG. 3) formed from the openings of the first concave holes 310 adjacent to each other. Each side surface is a wall surface, and a rib wall 308 a having a height from the bottom surface of the first concave hole 310 to the joint surface 350 is provided. A portion surrounded by a black frame in FIG. 4 is one rib wall 308a.
Further, the back plate 300 has a wall surface on each side surface of a pair of adjacent concave holes (for example, the second concave hole 311a and the second concave hole 311b shown in FIG. 3) formed from the openings of the second concave holes 311 adjacent to each other. And a rib wall 308b having a height from the bottom surface of the second recessed hole 311 to the bonding back surface 355. A portion surrounded by a black frame in FIG. 4 is one rib wall 308b.
The rib-shaped portion 315 includes a first rib-shaped portion 315a composed of a plurality of rib walls 308a and a second rib-shaped portion 315b composed of a plurality of rib walls 308b.

そして、本体プレート２００と、本体プレート２００に接合されたバックプレート３００とを接合の方向の一方の方向から透過して見た場合に本体リブ壁２０４とリブ壁３０８とは略同じ位置となる。言い換えれば、本体プレート２００と、本体プレート２００に接合されたバックプレート３００とを接合の方向の一方の方向から透過して見た場合に本体開口部２６０と開口部３６０とは略同じ位置となる。 When the main body plate 200 and the back plate 300 bonded to the main body plate 200 are viewed from one direction of the bonding direction, the main body rib wall 204 and the rib wall 308 are substantially in the same position. In other words, when the main body plate 200 and the back plate 300 bonded to the main body plate 200 are seen through from one direction of the bonding direction, the main body opening 260 and the opening 360 are substantially in the same position. .

バックプレート３００は、特定の複数のリブ壁３０８が、リブ壁３０８の高さ方向に対してそれぞれ直角方向に延長する方向で互いに集結する集結部７００ａを有する。
本体プレート２００は、特定の複数の本体リブ壁２０４が、本体リブ壁２０４の高さ方向に対してそれぞれ直角方向に延長する方向で互いに集結する集結部７００ｂを有する。
図２の例では、集結部７００ａにおいて、第２リブ形状部３１５ｂの６本のリブ壁３０８ｂが、高さ方向（第２凹穴３１１の底面から接合裏面３５５に向かう方向）に対して直角方向（リブ壁３０８の長さ方向）で互いに集結している。
集結部７００（集結部７００ａ及び集結部７００ｂ）は、例えば図２に示すように円柱状である。ただし、集結部７００の形状は円柱に限定されない。また、集結部７００は、前述の中空部５００を有することも可能である。（集結部７００ａは、中空部５００ａを有することが可能であり、集結部７００ｂは、中空部５００ｂを有することが可能である。） The back plate 300 includes a concentrating portion 700 a where a plurality of specific rib walls 308 are gathered together in a direction extending in a direction perpendicular to the height direction of the rib walls 308.
The main body plate 200 has a concentrating portion 700 b where a plurality of specific main body rib walls 204 are gathered together in a direction extending in a direction perpendicular to the height direction of the main body rib wall 204.
In the example of FIG. 2, the six rib walls 308 b of the second rib-shaped portion 315 b are perpendicular to the height direction (the direction from the bottom surface of the second recessed hole 311 toward the bonding back surface 355) in the concentration portion 700 a. They are gathered together in the length direction of the rib wall 308.
The collecting portion 700 (the collecting portion 700a and the collecting portion 700b) is, for example, a columnar shape as shown in FIG. However, the shape of the gathering part 700 is not limited to a cylinder. Further, the concentrating part 700 can also have the hollow part 500 described above. (The concentrating part 700a can have a hollow part 500a, and the concentrating part 700b can have a hollow part 500b.)

本体リブ形状部２１４は、略正三角形の本体開口部２６０から筒型形状を成して本体凹穴２１０を形成しており、本体リブ壁２０４が裏面２５０に格子形状を成すように配列されているとも言える。
ここで、本体リブ形状部２１４は、本体プレート２００から鏡面プレート７２０と、本体外周壁５１０と、本体内周壁５４０とを除いた部分である。言い換えれば、本体リブ形状部２１４は、本体リブ壁２０４と集結部７００から構成される部分である。 The main body rib shape portion 214 has a cylindrical shape formed from a substantially equilateral triangular main body opening 260 to form a main body concave hole 210, and the main body rib wall 204 is arranged so as to form a lattice shape on the back surface 250. It can be said that there is.
Here, the main body rib-shaped portion 214 is a portion obtained by removing the mirror plate 720, the main body outer peripheral wall 510, and the main body inner peripheral wall 540 from the main body plate 200. In other words, the main body rib-shaped portion 214 is a portion composed of the main body rib wall 204 and the collecting portion 700.

また、リブ形状部３１５（第１リブ形状部３１５ａと第２リブ形状部３１５ｂ）は、略正三角形の開口部３６０から筒型形状を成して凹穴（第１凹穴３１０と第２凹穴３１１）を形成しており、リブ壁３０８が接合面３５０と接合裏面３５５とに格子形状を成すように配列されているとも言える。
ここで、リブ形状部３１５は、バックプレート３００から底板プレート７１０と、外周壁５２０と、内周壁５３０とを除いた部分である。言い換えれば、リブ形状部３１５は、リブ壁３０８と集結部７００から構成される部分である。
そして、図４に示すように、第１リブ形状部３１５ａは、リブ形状部３１５の内、接合面３５０側に位置し、第２リブ形状部３１５ｂは、リブ形状部３１５の内、接合裏面３５５側に位置する。 The rib-shaped portion 315 (the first rib-shaped portion 315a and the second rib-shaped portion 315b) is formed into a cylindrical shape from the substantially equilateral triangular opening 360, and the concave holes (the first concave hole 310 and the second concave portion 315b). It can also be said that the holes 311) are formed, and the rib walls 308 are arranged in a lattice shape on the joint surface 350 and the joint back surface 355.
Here, the rib-shaped portion 315 is a portion obtained by removing the bottom plate 710, the outer peripheral wall 520, and the inner peripheral wall 530 from the back plate 300. In other words, the rib-shaped portion 315 is a portion composed of the rib wall 308 and the collecting portion 700.
As shown in FIG. 4, the first rib-shaped portion 315a is located on the bonding surface 350 side in the rib-shaped portion 315, and the second rib-shaped portion 315b is on the bonding back surface 355 in the rib-shaped portion 315. Located on the side.

このように、本体リブ壁２０４及びリブ壁３０８は、略正三角の筒状形状に配列されることで、トラス構造を成し、本体プレート２００とバックプレート３００との曲げに対する剛性を高くしている。
よって、本体プレート２００とバックプレート３００剛性を高くする為に、本体開口部２６０と開口部３６０とは、略正三角形であることが好ましいが、略正三角形の形状に限定されるものでは無い。例えばハニカム構造のように本体開口部２６０と開口部３６０とは、略正六角形であっても良い。 As described above, the main body rib wall 204 and the rib wall 308 are arranged in a substantially equilateral triangular cylindrical shape, thereby forming a truss structure and increasing rigidity against bending of the main body plate 200 and the back plate 300. Yes.
Therefore, in order to increase the rigidity of the main body plate 200 and the back plate 300, the main body opening 260 and the opening 360 are preferably substantially equilateral triangles, but are not limited to substantially equilateral triangle shapes. For example, like the honeycomb structure, the main body opening 260 and the opening 360 may be substantially regular hexagons.

本体リブ壁２０４は、本体プレート２００の素材である一つの円筒プレートを切削加工及び研削加工を施すことで形成される。同様に、リブ壁３０８は、バックプレート３００の素材である一つの円筒プレートを切削加工及び研削加工を施すことで形成される。 The main body rib wall 204 is formed by subjecting one cylindrical plate that is a material of the main body plate 200 to cutting and grinding. Similarly, the rib wall 308 is formed by subjecting one cylindrical plate that is a material of the back plate 300 to cutting and grinding.

図５は、従来の軽量化ミラー１００の例を示す断面斜視図である。
ここで、バックプレート３００が無い場合の軽量化ミラー１００を考える。 FIG. 5 is a cross-sectional perspective view showing an example of a conventional lightening mirror 100.
Here, the light weight mirror 100 without the back plate 300 is considered.

光学ミラーを反射鏡に用いる場合、解像度を向上させるために光学ミラーの鏡面２０５の口径を大きくすると、それに伴う自重変形が大きくなり、結果的に鏡面精度が劣化する。
従来の軽量化ミラー１００は、本体プレート２００の一方の面に鏡面２０５が形成され、他方の面は本体リブ形状部２１４となっている。
本体プレート２００の剛性を高めるには本体プレート２００の厚み方向に本体リブ壁２０４の高さを高くし、例えば特許文献１のような個片プレート５５０をそれぞれの本体開口部２６０に接合し、本体リブ壁２０４を補強する。一方、本体プレート２００の軽量化を高めるには本体リブ壁２０４の厚さを薄くする必要がある。 When an optical mirror is used as a reflecting mirror, if the aperture of the mirror surface 205 of the optical mirror is increased in order to improve the resolution, the accompanying self-weight deformation increases, resulting in a decrease in mirror surface accuracy.
In the conventional light weight mirror 100, a mirror surface 205 is formed on one surface of the main body plate 200, and the other surface is a main body rib-shaped portion 214.
In order to increase the rigidity of the main body plate 200, the height of the main body rib wall 204 is increased in the thickness direction of the main body plate 200, and for example, an individual plate 550 as in Patent Document 1 is joined to each main body opening 260. The rib wall 204 is reinforced. On the other hand, to increase the weight of the main body plate 200, it is necessary to reduce the thickness of the main body rib wall 204.

しかしながら、本体プレート２００の剛性を高める為に本体リブ壁２０４の高さを高くすると、本体リブ壁２０４を切削加工する際の加工砥石の突き出し量が長くなり、製造が困難となる。そして、個片プレート５５０の製造コスト及び、個片プレート５５０を本体開口部２６０に接合する場合の加工コストが加わることになる。
また、本体リブ壁２０４の厚さを薄くすると軽量化は向上するが、その反面、破損リスクは高くなる。 However, if the height of the main body rib wall 204 is increased in order to increase the rigidity of the main body plate 200, the protrusion amount of the processing grindstone when cutting the main body rib wall 204 becomes long, and the manufacture becomes difficult. And the manufacturing cost of the piece plate 550 and the processing cost in the case of joining the piece plate 550 to the main body opening 260 are added.
Further, when the thickness of the main body rib wall 204 is reduced, the weight reduction is improved, but the risk of breakage is increased.

一方、実施の形態１に係る軽量化ミラー１００は、鏡面２０５の口径を大きくする際に、本体リブ壁２０４及びリブ壁３０８を高くかつ薄くしても、バックプレート３００の底板３０９が、個片プレート５５０の役割を果たす為に、所望の剛性を確保することができる。すなわち、実施の形態１に係る軽量化ミラー１００は、個片プレート５５０を削減することが可能である。 On the other hand, in the light weight mirror 100 according to the first embodiment, when the diameter of the mirror surface 205 is increased, even if the main body rib wall 204 and the rib wall 308 are made high and thin, the bottom plate 309 of the back plate 300 is separated into pieces. In order to play the role of the plate 550, desired rigidity can be ensured. That is, the light weight mirror 100 according to the first embodiment can reduce the individual plate 550.

また、軽量化ミラー高さ１１３は、本体リブ形状部２１４及び第１リブ形状部３１５ａ及び第２リブ形状部３１５ｂの高さに分配される。そこで、軽量化ミラー高さ１１３（図４）を高くする際にも、本体リブ壁２０４及びリブ壁３０８を切削加工する際の加工砥石の突き出し量が長くならないため、製造が容易になる。すなわち、軽量化ミラー１００の軽量化加工時の製造が従来に比べ容易になる。 Further, the lighter mirror height 113 is distributed to the heights of the main body rib shape portion 214, the first rib shape portion 315a, and the second rib shape portion 315b. Therefore, even when the lightening mirror height 113 (FIG. 4) is increased, the protrusion amount of the processing grindstone when cutting the main body rib wall 204 and the rib wall 308 does not become long, so that the manufacture becomes easy. That is, it becomes easier to manufacture the weight reduction mirror 100 at the time of weight reduction processing.

このように、実施の形態１による光学ミラーは、これによって、コア及びバックプレートの剛性が高くなるので、光学ミラーの剛性をより向上させることができる。 As described above, in the optical mirror according to the first embodiment, the rigidity of the core and the back plate is increased, so that the rigidity of the optical mirror can be further improved.

実施の形態２．
実施の形態２について、図６〜図７を用いて説明する。 Embodiment 2. FIG.
The second embodiment will be described with reference to FIGS.

図６は、軽量化ミラー１００を示す断面斜視図である。
図７は、軽量化ミラー１００を示す断面図である。 FIG. 6 is a cross-sectional perspective view showing the lightening mirror 100.
FIG. 7 is a cross-sectional view showing the lightening mirror 100.

実施の形態２の軽量化ミラー１００は、実施の形態１と比べ、底板３０９の位置が異なっている。
その他は、実施の形態１と同様であり、説明を省略する。 The weight reduction mirror 100 according to the second embodiment differs from the first embodiment in the position of the bottom plate 309.
Others are the same as in the first embodiment, and a description thereof will be omitted.

図６と図７に示すように、実施の形態２の複数の第１凹穴３１０の開口部３６０ａ（図７）と、複数の第２凹穴３１１の開口部３６０ｂ（図７）とは、接合面３５０と接合裏面３５５とをバックプレート３００が本体プレート２００に対して積層する方向の一方の方向から透過して見た場合に、互いに重複部分が生じない異なる位置に形成される。 As shown in FIGS. 6 and 7, the openings 360 a (FIG. 7) of the plurality of first recessed holes 310 and the openings 360 b (FIG. 7) of the plurality of second recessed holes 311 of the second embodiment are When the joining surface 350 and the joining back surface 355 are viewed from one direction in which the back plate 300 is laminated on the main body plate 200, they are formed at different positions where no overlapping portions are generated.

複数の第１凹穴３１０のそれぞれの底板３０９ａは、複数の第１凹穴３１０のそれぞれの底面と、それぞれの第１凹穴３１０の底面を接合裏面３５５上に投影した場合の投影部分に対応する接合裏面３５５の一部とを両面とする。図７の黒枠で囲った部分が、一つの底板３０９ａである。
そして、複数の第２凹穴３１１のそれぞれの底板３０９ｂは、複数の第２凹穴３１１のそれぞれの底面と、それぞれの第２凹穴３１１の底面を接合面３５０上に投影した場合の投影部分に対応する接合面３５０の一部とを両面とする。図７の黒枠で囲った部分が、一つの底板３０９ｂである。
また、図６に示した底板３０９ｂの点線部分「Ｙ」が、第１凹穴３１０の底面を接合裏面３５５上に投影した場合の投影部分に対応する接合裏面３５５の一部である。第２凹穴３１１の底面を接合面３５０上に投影した場合の投影部分に対応する接合面３５０の一部については図示を省略するが、接合面３５０側に図６に示した点線部分「Ｙ」と同様な形状となる。 Each bottom plate 309a of the plurality of first concave holes 310 corresponds to a projected portion when the bottom surface of each of the plurality of first concave holes 310 and the bottom surface of each first concave hole 310 are projected onto the joining back surface 355. A part of the joining back surface 355 is defined as both surfaces. A portion surrounded by a black frame in FIG. 7 is one bottom plate 309a.
Each bottom plate 309b of each of the plurality of second recessed holes 311 is a projected portion when the bottom surface of each of the plurality of second recessed holes 311 and the bottom surface of each of the second recessed holes 311 is projected onto the joint surface 350. A part of the joint surface 350 corresponding to the above is defined as both surfaces. A portion surrounded by a black frame in FIG. 7 is one bottom plate 309b.
Also, the dotted line “Y” of the bottom plate 309b shown in FIG. 6 is a part of the joining back surface 355 corresponding to the projected portion when the bottom surface of the first concave hole 310 is projected onto the joining back surface 355. Although illustration of a part of the joint surface 350 corresponding to the projected portion when the bottom surface of the second concave hole 311 is projected onto the joint surface 350 is omitted, the dotted line portion “Y” shown in FIG. ".

また、複数の第１凹穴３１０のそれぞれの開口部３６０ａ（図７）は、接合面３５０（図７）と接合裏面３５５とをバックプレート３００が本体プレート２００に対して積層する方向の一方の方向から透過して見た場合に、少なくとも１つの第２凹穴３１１の開口部３６０ｂ（図７）と互いに隣接して形成される。
そして、互いに隣接する開口部３６０ａと開口部３６０ｂとがそれぞれ形成する第１凹穴３１０と、第２凹穴３１１とは、凹穴隣接ペアを形成する。
そして、リブ形状部３１５は、互いに隣接する凹穴隣接ペアである第１凹穴３１０と第２凹穴３１１のそれぞれの側面を壁面とし、凹穴隣接ペアである第１凹穴３１０の底面から第２凹穴３１１の底面までの高さを有するリブ壁３０８からなる。図７の黒枠で囲った部分が一つのリブ壁３０８である。 In addition, each of the openings 360 a (FIG. 7) of the plurality of first recessed holes 310 has one side in a direction in which the back plate 300 is stacked on the main body plate 200 with the joining surface 350 (FIG. 7) and the joining back surface 355. When viewed from the direction, the opening 360 b (FIG. 7) of at least one second recessed hole 311 is formed adjacent to each other.
The first recessed hole 310 and the second recessed hole 311 formed by the opening 360a and the opening 360b adjacent to each other form a recessed hole adjacent pair.
Then, the rib-shaped portion 315 has the respective side surfaces of the first concave hole 310 and the second concave hole 311 that are adjacent pairs of adjacent concave holes as wall surfaces, and from the bottom surface of the first concave hole 310 that is the adjacent pair of concave holes. The rib wall 308 has a height up to the bottom surface of the second recessed hole 311. A portion surrounded by a black frame in FIG. 7 is one rib wall 308.

ここで、図７に示すように複数の第１凹穴３１０の底板３０９ａからなる板状を第１底板プレート７１０ａと称する。（図が分かりづらくなる為、図７の「Ｉ」部分のみ第１底板プレート７１０ａを図示するが、図７の「II」部分についても同様である。）
第１底板プレート７１０ａは、図６に示す黒枠を断面とし、一枚の略円板状である。ただし、第１底板プレート７１０ａの形状は略円板状に限られない。（図が分かりづらくなる為、図６の「Ｉ」部分のみ第１底板プレート７１０ａ、外周壁５２０、内周壁５３０を図示するが、図６の「II」部分についても同様である。）
更に、図７に示すように複数の第２凹穴３１１の底板３０９ｂからなる板状を第２底板プレート７１０ｂと称する。（図が分かりづらくなる為、図７の「Ｉ」部分のみ第２底板プレート７１０ｂを図示するが、図７の「II」部分についても同様である。）
第２底板プレート７１０ｂは、図６に示す黒枠を断面とし、一枚の略円板状である。ただし、第２底板プレート７１０ｂの形状は略円板状に限られない。（図が分かりづらくなる為、図６の「Ｉ」部分のみ第２底板プレート７１０ｂ、外周壁５２０、内周壁５３０を図示するが、図６の「II」部分についても同様である。）
そして、リブ形状部３１５は、バックプレート３００から第１底板プレート７１０ａと第２底板プレート７１０ｂと、外周壁５２０と、内周壁５３０とを除いた部分である。言い換えれば、リブ形状部３１５は、リブ壁３０８と集結部７００から構成される部分である。 Here, as shown in FIG. 7, a plate shape composed of the bottom plates 309a of the plurality of first concave holes 310 is referred to as a first bottom plate plate 710a. (For the sake of clarity, the first bottom plate 710a is shown only in the “I” portion of FIG. 7, but the same applies to the “II” portion of FIG. 7.)
The first bottom plate 710a has a cross section of the black frame shown in FIG. However, the shape of the first bottom plate 710a is not limited to a substantially disc shape. (For the sake of clarity, the first bottom plate 710a, the outer peripheral wall 520, and the inner peripheral wall 530 are shown only in the “I” portion in FIG. 6, but the same applies to the “II” portion in FIG. 6.)
Further, as shown in FIG. 7, a plate shape composed of the bottom plate 309b of the plurality of second recessed holes 311 is referred to as a second bottom plate plate 710b. (For the sake of clarity, the second bottom plate 710b is shown only in the “I” portion of FIG. 7, but the same applies to the “II” portion of FIG. 7.)
The second bottom plate 710b has a cross section of the black frame shown in FIG. However, the shape of the second bottom plate 710b is not limited to a substantially disc shape. (For the sake of clarity, the second bottom plate 710b, the outer peripheral wall 520, and the inner peripheral wall 530 are shown only in the “I” portion of FIG. 6, but the same applies to the “II” portion of FIG. 6.)
The rib-shaped portion 315 is a portion obtained by removing the first bottom plate 710a, the second bottom plate 710b, the outer peripheral wall 520, and the inner peripheral wall 530 from the back plate 300. In other words, the rib-shaped portion 315 is a portion composed of the rib wall 308 and the collecting portion 700.

第１凹穴３１０は、バックプレート３００の接合面３５０に切削加工及び研削加工を施すことで形成される。
第２凹穴３１１は、バックプレート３００の接合裏面３５５に切削加工及び研削加工を施すことで形成される。 The first concave hole 310 is formed by subjecting the joining surface 350 of the back plate 300 to cutting and grinding.
The second recessed hole 311 is formed by performing cutting and grinding on the joining back surface 355 of the back plate 300.

実施の形態２のリブ壁３０８は、「リブ端フリー」の無い状態と言える。ここで、リブ端フリーとは、リブ壁３０８の先端が板状のままで、外部に剥きだしの状態であること（例えば底板３０９などが形成されていない状態のこと）を意味する。
例えば、図４に図示した「Ｂ」の矢印の箇所が、リブ端フリーとなっている。リブ端フリーのリブ壁３０８は、破損するリスクが高いと言える。
なお、バックプレート３００の外周壁５２０と、貫通穴３０３を形成する内周壁５３０とは、リブ壁３０８と異なる為、リブ端フリーであるか否かの対象外とする。 It can be said that the rib wall 308 of the second embodiment has no “rib end free”. Here, the rib end free means that the tip of the rib wall 308 remains in a plate shape and is exposed to the outside (for example, a state where the bottom plate 309 or the like is not formed).
For example, a portion indicated by an arrow “B” illustrated in FIG. 4 is free of rib ends. It can be said that the rib end-free rib wall 308 has a high risk of breakage.
In addition, since the outer peripheral wall 520 of the back plate 300 and the inner peripheral wall 530 forming the through hole 303 are different from the rib wall 308, it is excluded from whether or not the rib end is free.

そして、実施の形態２のリブ壁３０８は、リブ壁３０８の先端に底板３０９が形成されており、「リブ端フリー」の無い状態である。よって、実施の形態２の軽量化ミラー１００は、リブ壁３０８を高く、かつ、薄くしても研削加工する際、破損のリスクを低減し、製造が容易になる。そして、リブ壁３０８を薄くすることが出来る為、軽量化ミラー１００はより軽量化が可能となる。 The rib wall 308 according to the second embodiment has a bottom plate 309 formed at the tip of the rib wall 308 and is free of “rib end free”. Therefore, the lightweight mirror 100 of the second embodiment reduces the risk of breakage when grinding even if the rib wall 308 is high and thin, and the manufacture becomes easy. And since the rib wall 308 can be made thin, the lightweight mirror 100 can be further reduced in weight.

他の例としては、図示は省略するが、バックプレート３００の複数の第１凹穴３１０に囲まれた箇所が第２凹穴３１１となっても良い。
言い換えると、図６または図７の例で、バックプレート３００の第２凹穴３１１が形成されている任意の箇所が、第１凹穴３１０となっても良い。すなわち、第１凹穴３１０と第２凹穴３１１とが交互に並んでいなくても良い。
第２凹穴３１１が隣接して形成されると、リブ端フリーが生じてしまうが、複数の第１凹穴３１０に囲まれた箇所が第２凹穴３１１になってもリブ端フリーは生じず、同様の効果を得ることが出来る。 As another example, although not illustrated, a portion surrounded by the plurality of first concave holes 310 of the back plate 300 may be the second concave hole 311.
In other words, in the example of FIG. 6 or FIG. 7, any portion where the second concave hole 311 of the back plate 300 is formed may be the first concave hole 310. That is, the first concave holes 310 and the second concave holes 311 do not have to be arranged alternately.
If the second recessed holes 311 are formed adjacent to each other, the rib end free is generated. However, even if the portion surrounded by the plurality of first recessed holes 310 becomes the second recessed hole 311, the rib end free is generated. However, the same effect can be obtained.

実施の形態３．
実施の形態３について、図８〜図９を用いて説明する。
図８は、支持器が取り付けられた軽量化ミラー１００の例を示す断面図である。
図９は、支持部を有する軽量化ミラー１００の例を示す断面斜視図である。 Embodiment 3 FIG.
A third embodiment will be described with reference to FIGS.
FIG. 8 is a cross-sectional view showing an example of the lightening mirror 100 to which a support is attached.
FIG. 9 is a cross-sectional perspective view showing an example of the lightening mirror 100 having a support portion.

実施の形態３の軽量化ミラー１００は、実施の形態１及び実施の形態２と比べ、支持部３２０と、支持器４１８とを備える点が異なっている。底板３０９の位置が異なっている。
その他は、実施の形態１及び実施の形態２と同様であり、説明を省略する。 The lighter weight mirror 100 according to the third embodiment is different from the first and second embodiments in that a support unit 320 and a support 418 are provided. The position of the bottom plate 309 is different.
Others are the same as those in the first embodiment and the second embodiment, and a description thereof will be omitted.

軽量化ミラー１００は、例えば望遠鏡や人工衛星などに設置する際に、軽量化ミラー１００を支持する支持器４１８が取り付けられる。
支持器４１８は、例えばバックプレート３００と同じ素材の低膨張ガラスセラミックスであっても良いし、金属であっても良い。支持器４１８の材料は限定されるものでは無い。
そして、支持器４１８は、例えば無機接着材によってバックプレート３００に固定される。 For example, when the lightening mirror 100 is installed in a telescope or an artificial satellite, a supporter 418 that supports the lightening mirror 100 is attached.
The supporter 418 may be, for example, a low expansion glass ceramic made of the same material as the back plate 300, or may be a metal. The material of the supporter 418 is not limited.
The supporter 418 is fixed to the back plate 300 by, for example, an inorganic adhesive.

軽量化ミラー１００は、例えば望遠鏡や人工衛星などに設置された場合に、重力や加速による荷重や力が、支持器４１８を介して加えられる。
その為に、支持器４１８が取り付けられる部分は、軽量化ミラー１００の他の部分よりも、より高い強度が必要とされる。 For example, when the lightening mirror 100 is installed in a telescope or an artificial satellite, a load or force due to gravity or acceleration is applied via the support 418.
Therefore, the part to which the supporter 418 is attached needs higher strength than the other part of the lightening mirror 100.

図８の支持器４１８ａは、支持部３２０に取り付けられている。
支持部３２０は、接合裏面３５５の一部であり、強度を高める為に、実施の形態１では第２凹穴３１１が形成されていた部分に、凹穴を設けていない。
支持部３２０は、断面斜視図で表すと図９のようになる。 The supporter 418a in FIG. 8 is attached to the support part 320.
The support part 320 is a part of the joining back surface 355, and in order to increase the strength, no concave hole is provided in the part where the second concave hole 311 was formed in the first embodiment.
The support part 320 is shown in a sectional perspective view as shown in FIG.

図８は、実施の形態１の構造となっているが、実施の形態２の構造の第２凹穴３１１が形成される部分に凹穴を設けないことで、実施の形態２においても同様に支持部３２０を形成することが可能である。 Although FIG. 8 has the structure of the first embodiment, the same is true in the second embodiment by not providing a concave hole in the portion where the second concave hole 311 of the structure of the second embodiment is formed. The support 320 can be formed.

また、図８の支持器４１８ｂは、バックプレート側面６２０に取り付けられている。
支持器４１８は、接合裏面３５５とバックプレート側面６２０とのいずれかに取り付けられても良いし、接合裏面３５５とバックプレート側面６２０との両方に取り付けられても良い。 8 is attached to the back plate side surface 620.
The supporter 418 may be attached to either the joining back surface 355 and the back plate side surface 620, or may be attached to both the joining back surface 355 and the back plate side surface 620.

ここで、底板３０９の一方の面となる、複数の第１凹穴３１０の底面は、接合面３５０と接合裏面３５５とのそれぞれと略平行で、かつ、接合面３５０と接合裏面３５５との間に位置する同一平面（図８の点線Ｄ−Ｄ）上に配置される。
そして、底板３０９の他方の面となる、複数の第２凹穴３１１の底面は、接合面３５０と接合裏面３５５との間に位置し、かつ、同一平面（図８の点線Ｄ−Ｄ）と略平行な平行面（図８の点線Ｃ−Ｃ）上に配置される。
バックプレート側面６２０は、同一平面（図８の点線Ｃ−Ｃ）と平行面（図８の点線Ｄ−Ｄ）とが横断している。
そして、支持器４１８ｂは、同一平面（図８の点線Ｃ−Ｃ）がバックプレート側面６２０を横断する位置から平行面（図８の点線Ｄ−Ｄ）がバックプレート側面６２０を横断する位置までの範囲（図８のＥ）の少なくとも一部の範囲を含んだ位置に配置される。 Here, the bottom surfaces of the plurality of first concave holes 310 serving as one surface of the bottom plate 309 are substantially parallel to each of the bonding surface 350 and the bonding back surface 355 and between the bonding surface 350 and the bonding back surface 355. Are arranged on the same plane (dotted line DD in FIG. 8).
The bottom surfaces of the plurality of second recessed holes 311 that are the other surfaces of the bottom plate 309 are located between the bonding surface 350 and the bonding back surface 355 and are on the same plane (dotted line DD in FIG. 8). It arrange | positions on a substantially parallel parallel surface (dotted line CC of FIG. 8).
The back plate side surface 620 intersects the same plane (dotted line CC in FIG. 8) and a parallel plane (dotted line DD in FIG. 8).
The support 418b extends from a position where the same plane (dotted line CC in FIG. 8) crosses the back plate side surface 620 to a position where the parallel plane (dotted line DD in FIG. 8) crosses the back plate side surface 620. It arrange | positions in the position containing at least one part of the range (E of FIG. 8).

例えば、底板３０９の無い部分に、支持器４１８ｂを設置した場合、支持器４１８ｂから力が加わると、外周壁５２０（バックプレート側面６２０）は、薄い為に変形もしくは破損する可能性がある。 For example, when the supporter 418b is installed in a portion without the bottom plate 309, if a force is applied from the supporter 418b, the outer peripheral wall 520 (back plate side surface 620) may be deformed or broken because it is thin.

しかしながら、実施の形態３は、底板３０９と外周壁５２０が接している部分に対応するバックプレート側面６２０の部分の少なくとも一部、もしくは、底板３０９の延長上のバックプレート側面６２０の部分の少なくとも一部を含んだ範囲に支持器４１８ｂが設置されている。
そして、支持器４１８ｂから力が加わった場合に、その力は、底板３０９もしくは複数の底板３０９からなる板状の底板プレート７１０（図８）により支えられる。 However, in the third embodiment, at least a part of the back plate side surface 620 corresponding to the part where the bottom plate 309 and the outer peripheral wall 520 are in contact, or at least one of the back plate side surface 620 on the extension of the bottom plate 309 is used. The supporter 418b is installed in a range including the portion.
When a force is applied from the supporter 418b, the force is supported by a bottom plate 710 (FIG. 8) having a bottom plate 309 or a plurality of bottom plates 309.

実施の形態４．
実施の形態４について、図１０〜図１２を用いて説明する。
図１０は、荷重パスを分散させる軽量化ミラー１００の例を示す断面図である。
図１１は、荷重パスを分散させる軽量化ミラー１００の例を示す斜視図である。
図１２は、荷重パスを分散させる軽量化ミラー１００の他の例を示す断面図である。 Embodiment 4 FIG.
The fourth embodiment will be described with reference to FIGS.
FIG. 10 is a cross-sectional view illustrating an example of the lightening mirror 100 that disperses the load path.
FIG. 11 is a perspective view showing an example of the lightening mirror 100 that disperses the load path.
FIG. 12 is a cross-sectional view showing another example of the lightening mirror 100 that disperses the load path.

実施の形態４の軽量化ミラー１００は、実施の形態１及び実施の形態２及び実施の形態３と比べ、底板３０９の形状が異なっている。
その他は、実施の形態１及び実施の形態２及び実施の形態３と同様であり、説明を省略する。 The weight reduction mirror 100 of the fourth embodiment is different from the first, second, and third embodiments in the shape of the bottom plate 309.
Others are the same as those of the first embodiment, the second embodiment, and the third embodiment, and the description thereof is omitted.

実施の形態４は、支持器４１８ａが取り付けられる支持部３２０が、集結部７００である実施例である。 The fourth embodiment is an example in which the support part 320 to which the supporter 418a is attached is the concentration part 700.

支持部３２０となる集結部７００は、第２リブ形状部３１５ｂを成す特定の複数のリブ壁３０８ｂが、特定の複数のリブ壁３０８ｂの高さの方向に対してそれぞれの直角方向に延長する方向で互いに集結する集結部７００である。
集結部７００に集結する特定の複数のリブ壁が側面を成す第２凹穴３１１のそれぞれの底面は、一部が、集結部７００に接している。そして、一部が集結部７００に接する第２凹穴３１１のそれぞれの底板は、集結部７００に近づくにつれ、接合裏面３５５側への変位する変位量を大きくする。そして、集結部７００に接する部分が接合裏面３５５側へ最大に変位する。 The concentrating part 700 to be the support part 320 is a direction in which the specific rib walls 308b forming the second rib shape part 315b extend in the respective perpendicular directions with respect to the height direction of the specific rib walls 308b. It is the gathering part 700 which gathers together.
A part of the bottom surface of each of the second recessed holes 311 formed by a plurality of specific rib walls gathering in the gathering portion 700 is in contact with the gathering portion 700. And each bottom plate of the 2nd concave hole 311 in which the one part contact | connects the concentration part 700 enlarges the displacement amount which is displaced to the joining back surface 355 side, as the concentration part 700 is approached. And the part which touches the concentration part 700 displaces to the joining back surface 355 side to the maximum.

例えば、図１０に「Ｆ」で図示した黒太線は、第２凹穴３１１の底面である。
この第２凹穴３１１の底面は、集結部７００（支持部３２０）の近傍において、集結部７００（支持部３２０）近づくにつれ、序々に接合裏面３５５側に傾斜している。すなわち、第２凹穴３１１が平らである場合の状態から、接合裏面３５５側へ変位している。 For example, a thick black line indicated by “F” in FIG. 10 is the bottom surface of the second recessed hole 311.
The bottom surface of the second recessed hole 311 gradually inclines toward the joining back surface 355 as the concentration portion 700 (support portion 320) approaches in the vicinity of the concentration portion 700 (support portion 320). That is, the second concave hole 311 is displaced from the state where it is flat toward the bonded back surface 355 side.

図１１は、図１０の接合裏面３５５側へ変位した底板３０９を接合裏面３５５側から見た斜視図である。ただし、図１０で図示した支持部３２０の箇所と、図１１の支持部３２０の箇所とは、位置関係が異なるが、支持部３２０の位置は、実施の形態４の本質的な効果に影響を及ぼすものでは無い。 FIG. 11 is a perspective view of the bottom plate 309 displaced to the bonded back surface 355 side of FIG. 10 as viewed from the bonded back surface 355 side. However, the position of the support part 320 illustrated in FIG. 10 is different from the position of the support part 320 in FIG. 11, but the position of the support part 320 affects the essential effect of the fourth embodiment. It does not affect.

図１１の丸で囲った部分の集結部７００が、支持部３２０となっている。
底板３０９の一部は、例えば図１１の「Ｇ」で示すような箇所で集結部７００に接している。そして、底板３０９は、集結部７００に接した箇所が、接合裏面３５５側へ最大に変位している。 A concentrating portion 700 in a portion surrounded by a circle in FIG.
A part of the bottom plate 309 is in contact with the concentrating portion 700, for example, at a location indicated by “G” in FIG. And the location which the bottom plate 309 touched the concentration part 700 has displaced to the joining back surface 355 side at the maximum.

そして、接合裏面３５５側へ変位した複数の底板３０９は、略円錐状の形状を成している。接合裏面３５５側へ変位した複数の底板３０９の成す形状は、略円錐状に限定されるものでは無い。例えば略角錐状であっても良い。 And the several baseplate 309 displaced to the joining back surface 355 side has comprised the substantially conical shape. The shape formed by the plurality of bottom plates 309 displaced toward the bonding back surface 355 is not limited to a substantially conical shape. For example, it may be substantially pyramidal.

バックプレート３００は、実施の形態４のような底板３０９を有することにより、支持器４１８から加わった力を、図１０の実線矢印に示す経路（荷重パスと称する）に加え、図１０の点線矢印に示す経路（荷重パス）にも分散させることが出来る。よって、軽量化ミラー１００は、より強度を向上させることが可能となる。 Since the back plate 300 has the bottom plate 309 as in the fourth embodiment, the force applied from the supporter 418 is applied to the path indicated by the solid line arrow in FIG. 10 (referred to as a load path), and the dotted line arrow in FIG. It is possible to disperse to the route shown in (Load path). Therefore, the lighter mirror 100 can further improve the strength.

また、リブ壁３０８の間の底板３０９は、図１０の「Ｆ」と図１１に示すように、平面の状態の途中から接合裏面３５５側へ変位しても良いし、図１２に示すように、リブ壁３０８の間の底板３０９は、直線的に接合裏面３５５側へ変位しても良い。 Further, the bottom plate 309 between the rib walls 308 may be displaced from the middle of the plane state toward the joining back surface 355 side as shown in FIG. 10 “F” and FIG. 11, or as shown in FIG. The bottom plate 309 between the rib walls 308 may be linearly displaced toward the bonded back surface 355 side.

また、接合裏面３５５側へ変位する底面を有する底板３０９の他方の面の状態は、問わないが、軽量化の為に、図１０や図１２に示すように、同様に接合裏面３５５側へ変位しても良い。 Further, the state of the other surface of the bottom plate 309 having a bottom surface that is displaced toward the bonded back surface 355 is not limited. However, for the purpose of weight reduction, as shown in FIG. 10 and FIG. You may do it.

まとめると、実施の形態１〜４においては、
鏡が形成された一方の面である表面２０６と、他方の面である裏面２５０とを有する板状の本体プレート２００と、
前記本体プレート２００の前記裏面２５０と接合する接合面３５０と、他方の面である接合裏面３５５とを有する板状のバックプレート３００と
を備え、
前記バックプレート３００は、
前記接合面３５０を介して前記本体プレート２００の裏面２５０に接合することで、前記本体プレート２００に対して積層する状態を成し、
前記接合面３５０と前記接合裏面３５５との少なくともいずれかに複数の開口部３６０が形成され、
前記複数の開口部３６０のそれぞれから、前記開口部３６０が形成された面に対し、略直角の側面を有する前記積層の方向に凹んだ、底板３０９を有する凹穴が形成され、
２つの前記凹穴から成り、互いの側面から成る共通の壁であるリブ壁３０８で隔てられた互いに隣接する前記２つの凹穴から成る凹穴隣接ペアが複数形成され、
前記リブ壁３０８から成るリブ形状部３１５を有することを特徴とする軽量化ミラー１００について説明した。 In summary, in the first to fourth embodiments,
A plate-like main body plate 200 having a front surface 206 which is one surface on which a mirror is formed and a back surface 250 which is the other surface;
A plate-like back plate 300 having a joining surface 350 that joins the back surface 250 of the main body plate 200 and a joining back surface 355 that is the other surface;
The back plate 300 includes:
By joining to the back surface 250 of the main body plate 200 through the joint surface 350, a state of being stacked on the main body plate 200 is formed.
A plurality of openings 360 are formed in at least one of the bonding surface 350 and the bonding back surface 355,
From each of the plurality of openings 360, a recessed hole having a bottom plate 309 is formed that is recessed in the direction of the lamination having a side surface substantially perpendicular to the surface on which the opening 360 is formed.
A plurality of adjacent pairs of recessed holes each including the two recessed holes adjacent to each other and formed by the rib wall 308, which is a common wall composed of the two side surfaces and separated from each other, are formed.
The lightening mirror 100 having the rib-shaped portion 315 including the rib wall 308 has been described.

更に、実施の形態１〜４においては、
前記複数の凹穴は、
前記接合面３５０に形成された前記複数の開口部３６０のそれぞれから形成された複数の第１凹穴３１０と、
前記接合裏面３５５に形成された前記複数の開口部３６０のそれぞれから形成された複数の第２凹穴３１１とから成ることを特徴とする軽量化ミラー１００について説明した。 Furthermore, in the first to fourth embodiments,
The plurality of concave holes are
A plurality of first recessed holes 310 formed from each of the plurality of openings 360 formed in the joint surface 350;
The lightening mirror 100 including the plurality of second recessed holes 311 formed from each of the plurality of openings 360 formed in the bonding back surface 355 has been described.

更に、実施の形態１及び３〜４においては、
前記複数の第１凹穴３１０と、前記複数の第２凹穴３１１とは、
前記接合面３５０と前記接合裏面３５５とを前記積層の方向の一方の方向から透過して見た場合に、前記開口部３６０同士が互いに略同じ位置に形成され、
前記互いに略同じ位置に形成された前記接合面３５０側と前記接合裏面３５５側との前記開口部３６０それぞれから形成される前記第１凹穴３１０と前記第２凹穴３１１との一対からなり、互いの凹穴の底面を両面とする底板３０９を有する凹穴ペアを複数構成し、
前記リブ形状部３１５は、
互いに隣接する前記第１凹穴３１０の開口部３６０から形成される前記凹穴隣接ペアのそれぞれの側面を壁面とし、前記第１凹穴３１０の底面から前記接合面３５０までの高さを有する前記リブ壁３０８からなる第１リブ形状部３１５ａと、
互いに隣接する前記第２凹穴３１１の開口部３６０から形成される前記凹穴隣接ペアのそれぞれの側面を壁面とし、前記第２凹穴３１１の底面から前記接合裏面３５５までの高さを有する前記リブ壁３０８からなる第２リブ形状部３１５ｂと
を有する軽量化ミラーについて説明した。 Furthermore, in the first and third to fourth embodiments,
The plurality of first recessed holes 310 and the plurality of second recessed holes 311 are:
When the bonding surface 350 and the bonding back surface 355 are viewed through one direction of the stacking direction, the openings 360 are formed at substantially the same position,
The first concave hole 310 and the second concave hole 311 formed from the opening 360 on the bonding surface 350 side and the bonding back surface 355 side formed at substantially the same position, respectively, A plurality of concave hole pairs having a bottom plate 309 having both bottom surfaces of the concave holes as both sides,
The rib-shaped portion 315 is
Each side surface of the adjacent pair of concave holes formed from the opening 360 of the first concave hole 310 adjacent to each other is a wall surface, and has a height from the bottom surface of the first concave hole 310 to the joining surface 350. A first rib-shaped portion 315a composed of a rib wall 308;
Each side surface of the adjacent pair of recessed holes formed from the opening 360 of the second recessed hole 311 adjacent to each other is a wall surface, and has a height from the bottom surface of the second recessed hole 311 to the joining back surface 355. The lightening mirror having the second rib-shaped portion 315b made of the rib wall 308 has been described.

更に、実施の形態２においては、
前記複数の第１凹穴３１０の前記開口部３６０と、前記複数の第２凹穴３１１の前記開口部３６０とは、
前記接合面３５０と前記接合裏面３５５とを前記積層の方向の一方の方向から透過して見た場合に、互いに重複部分が生じない異なる位置に形成され、
前記複数の第１凹穴３１０のそれぞれの前記底板は、
前記複数の第１凹穴３１０のそれぞれの底面と、前記それぞれの第１凹穴３１０の底面を前記接合裏面３５５上に投影した場合の投影部分に対応する前記接合裏面３５５の一部とを両面とし、
前記複数の第２凹穴３１１のそれぞれの前記底板は、
前記複数の第２凹穴３１１のそれぞれの底面と、前記それぞれの第２凹穴３１１の底面を前記接合面３５０上に投影した場合の投影部分に対応する前記接合面３５０の一部とを両面とすることを特徴とする軽量化ミラー１００について説明した。 Furthermore, in the second embodiment,
The openings 360 of the plurality of first recessed holes 310 and the openings 360 of the plurality of second recessed holes 311 are:
When the joint surface 350 and the joint back surface 355 are viewed from one direction of the stacking direction, they are formed at different positions where no overlapping portions occur.
Each of the bottom plates of the plurality of first recessed holes 310 is
Each bottom surface of each of the plurality of first concave holes 310 and a part of the joint back surface 355 corresponding to the projected portion when the bottom surface of each first concave hole 310 is projected onto the joint back surface 355 are double-sided. age,
The bottom plate of each of the plurality of second recessed holes 311 is:
Both the bottom surfaces of the plurality of second concave holes 311 and a part of the joint surface 350 corresponding to the projected portion when the bottom surfaces of the respective second concave holes 311 are projected onto the joint surface 350 are double-sided. The lightening mirror 100 characterized by the above has been described.

更に、実施の形態２においては、
前記複数の第１凹穴３１０のそれぞれの前記開口部３６０は、
前記接合面３５０と前記接合裏面３５５とを前記積層の方向の一方の方向から透過して見た場合に、少なくとも１つの前記第２凹穴３１１の前記開口部３６０と互いに隣接して形成され、
互いに隣接する前記開口部３６０がそれぞれ形成する前記第１凹穴３１０と、前記第２凹穴３１１とは、
前記凹穴隣接ペアを形成し、
前記リブ形状部３１５は、
前記互いに隣接する前記凹穴隣接ペアである前記第１凹穴３１０と前記第２凹穴３１１のそれぞれの側面を壁面とし、前記凹穴隣接ペアである前記第１凹穴３１０の底面から前記第２凹穴３１１の底面までの高さを有する前記リブ壁３０８からなることを特徴とする軽量化ミラーについて説明した。 Furthermore, in the second embodiment,
The opening 360 of each of the plurality of first recessed holes 310 is
When the joining surface 350 and the joining back surface 355 are viewed through one direction of the stacking direction, the opening 360 of the at least one second recessed hole 311 is formed adjacent to each other,
The first concave hole 310 and the second concave hole 311 formed by the openings 360 adjacent to each other are as follows:
Forming said recessed hole adjacent pair;
The rib-shaped portion 315 is
The side surfaces of the first concave hole 310 and the second concave hole 311 which are adjacent pairs of the concave holes adjacent to each other are used as wall surfaces, and the first concave hole 310 which is the adjacent pair of concave holes forms the first surface from the bottom surface. The lightening mirror characterized by comprising the rib wall 308 having a height up to the bottom surface of the two recessed holes 311 has been described.

更に、実施の形態３においては、
前記底板３０９の一方の面となる、複数の前記第１凹穴３１０の底面は、
前記接合面３５０と前記接合裏面３５５とのそれぞれと略平行で、かつ、前記接合面３５０と前記接合裏面３５５との間に位置する同一平面上に配置され、
前記底板３０９の他方の面となる、複数の前記第２凹穴３１１の底面は、
前記接合面３５０と前記接合裏面３５５との間に位置し、かつ、前記同一平面と略平行な平行面上に配置され、
前記板状のバックプレート３００は、
前記接合面３５０と前記接合裏面３５５とから成る前記板状の厚さ方向の側面であり、前記同一平面と前記平行面とが横断するバックプレート側面６２０を有し、
前記バックプレート側面６２０は、
軽量化ミラー１００を設置する場合に、前記軽量化ミラー１００を支持する支持器４１８が取り付けられ、
前記支持器４１８は、
前記同一平面が前記バックプレート側面６２０を横断する位置から前記平行面が前記バックプレート側面６２０を横断する位置までの範囲の少なくとも一部の範囲を含んだ位置に配置されることを特徴とする軽量化ミラー１００について説明した。 Furthermore, in the third embodiment,
The bottom surfaces of the plurality of first concave holes 310 serving as one surface of the bottom plate 309 are:
The joint surface 350 and the joint back surface 355 are substantially parallel to each other, and are disposed on the same plane located between the joint surface 350 and the joint back surface 355,
The bottom surfaces of the plurality of second recessed holes 311 that are the other surface of the bottom plate 309 are:
It is located between the joint surface 350 and the joint back surface 355, and is disposed on a parallel surface substantially parallel to the same plane,
The plate-shaped back plate 300 includes:
The plate-like thickness side surface composed of the bonding surface 350 and the bonding back surface 355, and has a back plate side surface 620 across which the same plane and the parallel surface cross,
The back plate side 620 includes:
When the lightening mirror 100 is installed, a supporter 418 that supports the lightening mirror 100 is attached,
The support 418 includes:
The lightweight is characterized in that the same plane is disposed at a position including at least a part of a range from a position where the same plane crosses the back plate side surface 620 to a position where the parallel plane crosses the back plate side surface 620. The mirror 100 has been described.

更に、実施の形態３においては、
前記バックプレート３００は、
前記軽量化ミラー１００を設置する場合に、前記軽量化ミラー１００を支持する支持器４１８が取り付けられる支持部３２０を有し、
前記支持部３２０は、
前記バックプレート３００の前記接合裏面３５５の一部であることを特徴とする軽量化ミラー１００について説明した。 Furthermore, in the third embodiment,
The back plate 300 includes:
A support unit 320 to which a supporter 418 for supporting the lightening mirror 100 is attached when the lightening mirror 100 is installed;
The support 320 is
The lightening mirror 100, which is a part of the bonded back surface 355 of the back plate 300, has been described.

更に、実施の形態４においては、
前記バックプレート３００は、
前記軽量化ミラー１００を設置する場合に、前記軽量化ミラー１００を支持する支持器４１８が取り付けられる支持部３２０を有し、
前記支持部３２０は、
前記第２リブ形状部３１５ｂを成す特定の複数の前記リブ壁３０８が、前記特定の複数のリブ壁３０８の前記高さの方向に対してそれぞれの直角方向に延長する方向で互いに集結する集結部７００であり、
前記集結部７００に集結する前記特定の複数のリブ壁３０８が前記側面を成す前記第２凹穴３１１のそれぞれの前記底面は、
一部が、前記集結部７００に接し、
前記一部が前記集結部７００に接する前記第２凹穴３１１のそれぞれの底板は、
前記集結部７００に近づくにつれ、前記接合裏面３５５側への変位する変位量を大きくし、前記前記集結部７００に接する部分が前記接合裏面３５５側へ最大に変位することを特徴とする軽量化ミラーについて説明した。 Furthermore, in the fourth embodiment,
The back plate 300 includes:
A support unit 320 to which a supporter 418 for supporting the lightening mirror 100 is attached when the lightening mirror 100 is installed;
The support 320 is
The specific plurality of rib walls 308 forming the second rib-shaped portion 315b are gathered together in a direction extending in a direction perpendicular to the height direction of the specific plurality of rib walls 308. 700,
The bottom surface of each of the second recessed holes 311 where the specific plurality of rib walls 308 gathered in the gathering portion 700 form the side surface,
A part touches the concentration part 700,
Each bottom plate of the second recessed hole 311 where the part is in contact with the concentrating part 700 is:
As the concentration portion 700 is approached, the amount of displacement that is displaced toward the bonding back surface 355 is increased, and the portion that is in contact with the concentration portion 700 is displaced to the maximum at the bonding back surface 355 side. Explained.

更に、実施の形態１〜４においては、
前記本体プレート２００は、
前記裏面２５０に、複数の本体開口部２６０が形成され、前記複数の本体開口部２６０のそれぞれから、前記裏面２５０に対し、略直角の側面を有する前記裏面２５０から前記表面方向に凹んだ本体凹穴２１０が形成され、
互いに隣接する前記本体開口部２６０のそれぞれから形成される互いに隣接する前記本体凹穴２１０である本体凹穴隣接ペアを隔てる壁であり、前記本体凹穴隣接ペアのそれぞれの側面を壁面とする壁である本体リブ壁２０４から成る本体リブ形状部２１４を有し、
前記バックプレート３００のリブ壁３０８は、
前記本体プレート２００と、前記本体プレート２００に接合された前記バックプレート３００とを前記接合の方向の一方の方向から透過して見た場合に、前記本体リブ壁２０４と略同じ位置であることを特徴とする軽量化ミラーについて説明した。 Furthermore, in the first to fourth embodiments,
The body plate 200 includes:
A plurality of main body openings 260 are formed in the back surface 250, and the main body recesses recessed from the back surface 250 having side surfaces substantially perpendicular to the back surface 250 from each of the plurality of main body opening portions 260 in the surface direction. Hole 210 is formed,
Walls separating main body concave hole adjacent pairs, which are the main body concave holes 210 adjacent to each other, formed from each of the main body opening portions 260 adjacent to each other, and walls each having a side wall as a wall surface A main body rib-shaped portion 214 composed of a main body rib wall 204,
The rib wall 308 of the back plate 300 is
When the main body plate 200 and the back plate 300 joined to the main body plate 200 are seen from one direction of the joining direction, the main body plate 200 is substantially the same position as the main body rib wall 204. The featured lightweight mirror has been described.

更に、実施の形態１〜４においては、
前記バックプレート３００の前記複数の凹穴の前記開口部３６０は、
略正三角形の形状であることを特徴とする軽量化ミラー１００について説明した。 Furthermore, in the first to fourth embodiments,
The openings 360 of the plurality of recessed holes of the back plate 300 are
The lightening mirror 100 having a substantially equilateral triangular shape has been described.

更に、実施の形態１〜４においては、
前記本体プレート２００の前記複数の本体凹穴２１０の前記本体開口部２６０は、
略正三角形の形状であることを特徴とする軽量化ミラー１００について説明した。 Furthermore, in the first to fourth embodiments,
The main body openings 260 of the plurality of main body recessed holes 210 of the main body plate 200 are:
The lightening mirror 100 having a substantially equilateral triangular shape has been described.

更に、実施の形態１〜４においては、
前記本体プレート２００と前記バックプレート３００とは、
低膨張ガラスセラミックス素材を材料としたことを特徴とする軽量化ミラー１００について説明した。 Furthermore, in the first to fourth embodiments,
The main body plate 200 and the back plate 300 are:
The lightweight mirror 100 characterized by using a low expansion glass ceramic material has been described.

更に、言い換えてまとめると、
実施の形態１〜４においては、
鏡面２０５の形成された本体プレート２００（コア）と、バックプレート３００から構成され、前記本体プレート２００（コア）の裏面２５０（背面）及びバックプレート３００の両面（接合面３５０と接合裏面３５５）にリブ面が形成されることを特徴とする軽量化ミラー１００（光学ミラー）について説明した。 Furthermore, in other words:
In the first to fourth embodiments,
A main body plate 200 (core) on which a mirror surface 205 is formed and a back plate 300 are formed. On the back surface 250 (back surface) of the main body plate 200 (core) and on both surfaces of the back plate 300 (a bonding surface 350 and a bonding back surface 355). The lightening mirror 100 (optical mirror) characterized in that a rib surface is formed has been described.

更に、実施の形態３においては、
前記バックプレート３００の接合裏面３５５（基底部）に、前記バックプレート３００を支える支持部３２０が取り付けられたことを特徴とする軽量化ミラー１００（光学ミラー）について説明した。 Furthermore, in the third embodiment,
The lightening mirror 100 (optical mirror) characterized in that the support part 320 that supports the back plate 300 is attached to the joining back surface 355 (base part) of the back plate 300 has been described.

更に、実施の形態３〜４においては、
前記バックプレート３００の接合裏面３５５（基底部）と、前記バックプレート３００の半径方向における前記バックプレート３００の外周に、前記バックプレート３００を支える支持部３２０もしくは支持器４１８が取り付けられたことを特徴とする軽量化ミラー１００（光学ミラー）について説明した。 Furthermore, in the third to fourth embodiments,
A support portion 320 or a support device 418 for supporting the back plate 300 is attached to the joint back surface 355 (base portion) of the back plate 300 and the outer periphery of the back plate 300 in the radial direction of the back plate 300. The lightening mirror 100 (optical mirror) has been described.

更に、実施の形態１〜４においては、
前記本体プレート２００（コア）及びバックプレート３００は、低膨張ガラスセラミックス素材を加工した加工品を接合して構成されることを特徴とする軽量化ミラー１００（光学ミラー）について説明した。 Furthermore, in the first to fourth embodiments,
The main body plate 200 (core) and the back plate 300 have been described with respect to the lightening mirror 100 (optical mirror), characterized in that it is configured by joining processed products obtained by processing a low expansion glass ceramic material.

１００軽量化ミラー、１１３軽量化ミラー高さ、２００本体プレート、２０３貫通穴、２０４本体リブ壁、２０５鏡面、２０６表面、２１０本体凹穴、２１４本体リブ形状部、２５０裏面、２６０本体開口部、３００バックプレート、３０３貫通穴、３０８リブ壁、３０９底板、３１０第１凹穴、３１１第２凹穴、３１５リブ形状部、３１５ａ第１リブ形状部、３１５ｂ第２リブ形状部、３２０支持部、３５０接合面、３５５接合裏面、３６０開口部、４００接着面、４１８支持器、５００中空部、５１０本体外周壁、５２０外周壁、５３０内周壁、５４０本体内周壁、５５０個片プレート、６１０本体側面、６２０バックプレート側面、７００集結部、７１０底板プレート、７１０ａ第１底板プレート、７１０ｂ第２底板プレート、７２０鏡面プレート。 DESCRIPTION OF SYMBOLS 100 Light weight mirror, 113 Light weight mirror height, 200 Main body plate, 203 Through-hole, 204 Main body rib wall, 205 Mirror surface, 206 Front surface, 210 Main body concave hole, 214 Main body rib shape part, 250 Back surface, 260 Main body opening part, 300 Back plate, 303 Through hole, 308 Rib wall, 309 Bottom plate, 310 1st recessed hole, 311 2nd recessed hole, 315 Rib shaped part, 315a 1st rib shaped part, 315b 2nd rib shaped part, 320 Support part, 350 Bonding surface, 355 Bonding back surface, 360 Opening portion, 400 Bonding surface, 418 Supporter, 500 Hollow portion, 510 Main body outer peripheral wall, 520 Outer peripheral wall, 530 Inner peripheral wall, 540 Internal peripheral wall, 550 Single plate, 610 Main body side surface 620 Back plate side surface 700 Concentration part 710 Bottom plate plate 710a 1 bottom plate plate, 710b a second bottom plate plate, 720 mirror plate.

Claims

A plate-shaped main body plate having a surface that is one surface on which a mirror is formed and a back surface that is the other surface;
A plate-shaped back plate having a bonding surface to be bonded to the back surface of the main body plate and a bonding back surface that is the other surface;
The back plate is
By joining to the back surface of the main body plate via the joint surface, a state of stacking on the main body plate is formed,
A plurality of openings are formed in at least one of the bonding surface and the bonding back surface,
From each of the plurality of openings, a recessed hole having a bottom plate is formed, which is recessed in the direction of the lamination having side surfaces substantially perpendicular to the surface on which the opening is formed.
A plurality of adjacent adjacent pairs of concave holes, each consisting of the two concave holes, which are adjacent to each other and separated by a rib wall that is a common wall composed of the two side surfaces,
A lightweight mirror to have a rib-shaped portion formed of the rib wall,
The plurality of concave holes are
A plurality of first recessed holes formed from each of the plurality of openings formed in the joint surface;
A plurality of second recessed holes formed from each of the plurality of openings formed in the bonding back surface;
The plurality of first recessed holes and the plurality of second recessed holes are:
When the joint surface and the joint back surface are seen from one direction of the stacking direction, the openings are formed at substantially the same position,
It consists of a pair of the first concave hole and the second concave hole formed from each of the openings on the bonding surface side and the bonding back surface side formed at substantially the same position, and Consists of a plurality of concave hole pairs having a bottom plate with both bottom surfaces,
The rib-shaped portion is
Each side surface of the adjacent pair of concave holes formed from the openings of the first concave holes adjacent to each other is a wall surface, and the rib wall has a height from the bottom surface of the first concave hole to the joint surface. A first rib-shaped portion;
Each side surface of the adjacent pair of recessed holes formed from the openings of the second recessed holes adjacent to each other is a wall surface, and the rib wall has a height from the bottom surface of the second recessed hole to the joining back surface. A second rib-shaped portion;
Have
The back plate is
When installing the lightening mirror, having a support part to which a supporter that supports the lightening mirror is attached;
The support part is
A plurality of the plurality of rib walls forming the second rib-shaped portion are gathering portions that gather together in a direction extending in a direction perpendicular to the direction of the height of the plurality of specific rib walls;
Each of the bottom surfaces of the second recessed holes in which the specific plurality of rib walls that are concentrated at the concentration portion form the side surface,
A part touches the gathering part,
Each bottom plate of the second recessed hole, the part of which is in contact with the collecting portion,
A lightening mirror characterized in that as it approaches the concentrating portion, the amount of displacement toward the joining back surface side is increased, and the portion in contact with the concentrating portion is displaced to the maximum on the joining back surface side.

The openings of the plurality of first recessed holes and the openings of the plurality of second recessed holes are:
When the joint surface and the joint back surface are seen through from one direction of the stacking direction, they are formed at different positions where no overlapping portion occurs.
The bottom plate of each of the plurality of first recessed holes is
Each bottom surface of the plurality of first concave holes and a part of the bonding back surface corresponding to a projected portion when the bottom surface of each first concave hole is projected onto the bonding back surface,
The bottom plate of each of the plurality of second concave holes is
Each bottom surface of the plurality of second concave holes and a part of the joint surface corresponding to a projection portion when the bottom surface of each second concave hole is projected onto the joint surface are both surfaces. The lightweight mirror according to claim 1 .

The opening of each of the plurality of first recessed holes is
When the joining surface and the joining back surface are seen through from one direction of the stacking direction, the opening of at least one second concave hole is formed adjacent to each other,
The first concave hole and the second concave hole formed by the openings adjacent to each other,
Forming said recessed hole adjacent pair;
The rib-shaped portion is
The side surfaces of the first and second concave holes that are adjacent pairs of the concave holes adjacent to each other are used as wall surfaces, and the second concave holes are formed from the bottom surface of the first concave hole that is the adjacent pair of concave holes. The lightweight mirror according to claim 2, comprising the rib wall having a height up to the bottom surface.

The bottom surfaces of the plurality of first concave holes, which are one surface of the bottom plate,
It is substantially parallel to each of the bonding surface and the bonding back surface, and is disposed on the same plane located between the bonding surface and the bonding back surface,
The bottom surfaces of the plurality of second recessed holes, which are the other surfaces of the bottom plate,
Located between the joint surface and the joint back surface, and disposed on a parallel plane substantially parallel to the same plane;
The plate-shaped back plate is
It is a side surface in the thickness direction of the plate-like back plate composed of the bonding surface and the bonding back surface, and has a back plate side surface that the same plane and the parallel surface cross.
The back plate side is
When installing a lightweight mirror, a supporter for supporting the lightweight mirror is attached,
The support is
Claim 1, wherein the same plane is disposed at a position including at least a portion of the scope to a position where the parallel plane transverse to the back plate side from a position transverse to the back plate side surface Lightweight mirror described.

The back plate is
When installing the lightening mirror, having a support part to which a supporter that supports the lightening mirror is attached;
The support part is
The lightweight mirror according to any one of claims 1 to 4 , wherein the mirror is a part of the back surface of the back plate.

The body plate is
A plurality of main body openings are formed on the back surface, and from each of the plurality of main body openings, a main body concave hole is formed that is recessed in the surface direction from the back surface having a side surface substantially perpendicular to the back surface,
It is a wall that separates main body concave hole adjacent pairs, which are the main body concave holes adjacent to each other, formed from each of the main body opening portions adjacent to each other, and is a wall having each side surface of the main body concave hole adjacent pair as a wall surface. It has a main body rib shape part consisting of a main body rib wall,
The rib wall of the back plate is
The main body plate and the back plate joined to the main body plate are substantially at the same position as the main body rib wall when viewed through one direction of the joining direction. Item 6. A lightweight mirror according to any one of items 1 to 5 .

The openings of the plurality of recessed holes of the back plate are
Lightweight mirror 請 Motomeko 1-6 wherein any you being a shape of substantially equilateral triangle.

The main body openings of the plurality of main body recessed holes of the main body plate are:
Lightweight mirror 請 Motomeko 6 wherein you being a shape of substantially equilateral triangle.

The body plate and the back plate are:
Lightweight mirror 請 Motomeko 1-8 wherein any you characterized in that the low-expansion glass ceramic material as the material.