JP2002267905A - Joined optical element and method of manufacturing the same - Google Patents
Joined optical element and method of manufacturing the sameInfo
- Publication number
- JP2002267905A JP2002267905A JP2001066178A JP2001066178A JP2002267905A JP 2002267905 A JP2002267905 A JP 2002267905A JP 2001066178 A JP2001066178 A JP 2001066178A JP 2001066178 A JP2001066178 A JP 2001066178A JP 2002267905 A JP2002267905 A JP 2002267905A
- Authority
- JP
- Japan
- Prior art keywords
- optical element
- liquid crystal
- adhesive
- crystal cell
- lithium niobate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Liquid Crystal (AREA)
- Mounting And Adjusting Of Optical Elements (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、液晶セルを光学素
子の一部として用いた接合光学素子とその製造方法に関
する。The present invention relates to a bonded optical element using a liquid crystal cell as a part of an optical element and a method for manufacturing the same.
【０００２】[0002]
【従来の技術】近年、液晶パネルの製造技術が進歩し、
安定して液晶パネルが量産できるようになってきたこと
もあり、液晶セルをシャッター等、光学素子の一部とし
て用いることが増えてきた。2. Description of the Related Art In recent years, liquid crystal panel manufacturing technology has advanced,
Since liquid crystal panels can be mass-produced stably, liquid crystal cells are increasingly used as a part of optical elements such as shutters.
【０００３】一般には、液晶セルにあって、液晶物質を
封入しておくスペースを確保するためのシール剤として
は、スペーサとしてのフィラーを混入した熱硬化型エポ
キシ系接着剤が用いられ、このスペースに液晶物質を封
入した後の封止剤としては、熱硬化型エポキシ系接着剤
や、常温速硬化が可能な紫外線硬化型接着剤が用いられ
ている。In general, in a liquid crystal cell, a thermosetting epoxy adhesive mixed with a filler as a spacer is used as a sealant for securing a space for enclosing a liquid crystal substance. As a sealant after the liquid crystal material is sealed in the liquid crystal panel, a thermosetting epoxy-based adhesive or an ultraviolet-curable adhesive that can be rapidly cured at room temperature is used.
【０００４】特開平５−３０７１６０号公報や特開平６
−１４８６５６号公報、あるいは特開平１１−２２８９
３７号公報には、封止剤として紫外線硬化型の接着剤を
用い、これに紫外線を照射して短時間で硬化させる方法
が開示されている。紫外線の照射には、２５４ｎｍや３
６５ｎｍを主なピーク波長とする水銀系のランプを用い
るが、量産化を狙って、最近では、高強度の紫外線を照
射し接着剤を短時間で硬化させる方法が採られている。[0004] JP-A-5-307160 and JP-A-6-307160
148656, JP-A-11-2289
No. 37 discloses a method in which an ultraviolet-curable adhesive is used as a sealant, and the adhesive is irradiated with ultraviolet light to cure the adhesive in a short time. For UV irradiation, 254 nm or 3
A mercury-based lamp having a main peak wavelength of 65 nm is used. For mass production, a method of irradiating high-intensity ultraviolet rays and curing the adhesive in a short time has recently been adopted.
【０００５】[0005]
【発明が解決しようとする課題】しかし、液晶物質は不
安定な有機化合物であり、紫外線に非常に弱いため短時
間でも高強度の照射を受けると劣化し、たとえ低照度で
も長時間照射されるとやはり劣化する。このように劣化
した液晶物質は、電圧の印加で液晶の配向を制御するた
めの応答時間が長くなったり、透明性が失われたりす
る、という問題があった。However, the liquid crystal material is an unstable organic compound, and is very weak to ultraviolet rays, so that it is deteriorated when irradiated with high intensity even for a short time, and is irradiated for a long time even at low illuminance. And also deteriorates. Such a deteriorated liquid crystal material has a problem that a response time for controlling the alignment of the liquid crystal by application of a voltage becomes long or transparency is lost.
【０００６】更に、液晶セルの外装を構成するガラスと
無機光学素子とを接合して接合光学素子を形成する場
合、ガラスと無機光学素子の熱膨張係数が大きく異なる
と初期的に接合できても、各種の環境試験中において、
その熱膨張係数の差により発生した熱応力が原因となっ
て、ガラスあるいは無機光学素子が剥がれたり破損した
りして、使用に耐えない状態になってしまう、という問
題点もあった。Further, when the glass constituting the exterior of the liquid crystal cell and the inorganic optical element are joined to form a joined optical element, even if the glass and the inorganic optical element have a large difference in thermal expansion coefficient, they can be initially joined. , During various environmental tests,
There is also a problem that the glass or the inorganic optical element is peeled or damaged due to the thermal stress generated due to the difference in the thermal expansion coefficient, and the glass or the inorganic optical element is in a state where it cannot be used.
【０００７】特に、最近開発された画像表示装置では、
偏光方向を制御するための１ｍｍ以下の厚さの無機光学
素子を用いて、無機光学素子、液晶セル、無機光学素
子、無機光学素子液晶セル、の５つの光学素子を順に、
各界面に接着剤を介して接合した接合光学素子を用いて
いるものもあり、このような積層構成では、４つの接着
剤の層を一度に短時間で硬化させ、かつ経時的に剥がれ
たり破損したりしない必要がある。In particular, in a recently developed image display device,
Using an inorganic optical element having a thickness of 1 mm or less for controlling the polarization direction, the inorganic optical element, the liquid crystal cell, the inorganic optical element, the inorganic optical element liquid crystal cell, five optical elements in order,
Some of them use a bonding optical element bonded to each interface via an adhesive. In such a laminated structure, the four adhesive layers are cured at once in a short time, and peeled or damaged over time. You don't have to.
【０００８】しかし、無機光学素子や液晶セルは、必ず
しも紫外線の透過率が良好ではなく、このような積層構
造では一度に短時間で硬化させたり、経時的に剥がれた
り破損したりしないように製造することは非常に困難で
あった。However, inorganic optical elements and liquid crystal cells are not always good in transmittance of ultraviolet rays, and such a laminated structure is manufactured so as to be hardened at a time in a short time, or to be peeled or damaged with time. It was very difficult to do.
【０００９】本発明は、かかる従来の問題点に鑑みてな
されたもので、液晶セルを劣化させることなく、短時間
で接着剤を硬化できる接合光学素子とその製造方法を提
供するとともに、経時的に液晶セルや無機光学素子が剥
がれたり破損することのない接合光学素子を提供するこ
とを目的とする。The present invention has been made in view of the above-mentioned conventional problems, and provides a bonding optical element which can cure an adhesive in a short time without deteriorating a liquid crystal cell, and a method for manufacturing the same. It is another object of the present invention to provide a bonded optical element in which a liquid crystal cell and an inorganic optical element are not peeled or damaged.
【００１０】[0010]
【課題を解決するための手段】上記目的を達成するため
に、本発明の請求項１の接合光学素子の製造方法は、少
なくとも１個の液晶セルと光学素子とを接着剤を介して
固定する接合光学素子の製造方法において、４００ｎｍ
以上の波長の可視光領域に吸収を有する接着剤を用い、
３６０ｎｍ以下および６２０ｎｍ以上の波長の光が除去
され、かつ４００ｎｍ以下の波長領域に存在するどのピ
ーク波長における強度も、４００ｎｍ以上５５０ｎｍ以
下の波長領域に存在するピーク波長における最大強度の
２０％未満であるような光によって、前記接着剤を硬化
させることで、前記液晶セルの少なくとも一つの光透過
面を前記光学素子に接着することを特徴とする。According to a first aspect of the present invention, there is provided a method for manufacturing a bonded optical element, wherein at least one liquid crystal cell and an optical element are fixed with an adhesive. In the method for manufacturing a junction optical element, 400 nm
Using an adhesive having absorption in the visible light region of the above wavelength,
Light at wavelengths of 360 nm or less and 620 nm or more is removed, and the intensity at any peak wavelength existing in the wavelength region of 400 nm or less is less than 20% of the maximum intensity at the peak wavelength existing in the wavelength region of 400 nm or more and 550 nm or less. By curing the adhesive with such light, at least one light transmitting surface of the liquid crystal cell is bonded to the optical element.
【００１１】また、本発明の請求項２の接合光学素子
は、請求項１記載の接合光学素子の製造方法によって製
造されたことを特徴とする。According to a second aspect of the present invention, there is provided a bonded optical element manufactured by the method for manufacturing a bonded optical element according to the first aspect.
【００１２】これらの発明によれば、液晶セルの少なく
とも一つの光透過面と光学素子とを、４００ｎｍ以上の
波長の可視光領域に吸収を有する可視光硬化型の接着剤
で接着固定するに際し、照射光として、３６０ｎｍ以下
の波長の紫外光および６２０ｎｍ以上の波長の光をカッ
トし、かつ４００ｎｍ以下の波長領域に存在する紫外光
強度を抑えた基本的に可視光領域のみの光を用いること
により、液晶セルを劣化させることがない。また、可視
光は液晶セルによって吸収されないため、液晶セルを介
して可視光を照射しても可視光は接着剤に有効に吸収さ
れ、短時間で接着剤を硬化できる。According to these inventions, at least one light transmitting surface of the liquid crystal cell and the optical element are adhered and fixed with a visible light curable adhesive having absorption in a visible light region having a wavelength of 400 nm or more. By irradiating ultraviolet light having a wavelength of 360 nm or less and light having a wavelength of 620 nm or more as the irradiation light, and using light of basically only the visible light region in which the ultraviolet light intensity existing in the wavelength region of 400 nm or less is suppressed. In addition, the liquid crystal cell does not deteriorate. Further, since visible light is not absorbed by the liquid crystal cell, even if visible light is irradiated through the liquid crystal cell, the visible light is effectively absorbed by the adhesive, and the adhesive can be cured in a short time.
【００１３】接着剤のモノマーやオリゴマーとしては、
主にアクリル系やエポキシ系の成分を用いる。光重合開
始剤としては、可視光域に吸収波長を有するカンファー
キノン系、アシルフォスフィンオキサイド系、カチオン
色素と有機硼素化合物を組合わせた系等の光重合開始剤
に、必要に応じてカップリング剤等の接着助剤やメルカ
プト化合物等の連鎖移動剤、アミン化合物等の増感剤、
有機過酸化物、染料、レドックス系の重合開始剤、重合
安定剤等を添加したものを用いる。The monomers and oligomers of the adhesive include:
Acrylic or epoxy components are mainly used. As the photopolymerization initiator, it is optionally coupled to a photopolymerization initiator such as a camphorquinone type having an absorption wavelength in a visible light range, an acylphosphine oxide type, or a combination of a cationic dye and an organic boron compound. Chain transfer agents such as bonding aids and mercapto compounds, sensitizers such as amine compounds,
A material to which an organic peroxide, a dye, a redox-based polymerization initiator, a polymerization stabilizer, and the like are added is used.
【００１４】照射光としては、メタルハライドランプ等
の比較的可視光域の光を効率よく発光する光源を用い、
これにブルーフィルター、反射板、光ファイバーライト
ガイド等を併用する。As the irradiation light, a light source such as a metal halide lamp which efficiently emits light in a relatively visible light region is used.
A blue filter, a reflector, an optical fiber light guide, and the like are used in combination.
【００１５】本発明の請求項３の接合光学素子は、請求
項２記載の接合光学素子であって、前記光学素子が無機
光学素子であり、前記接着剤の硬度がショアＤで５０以
下、ショアＡで１５以上９０以下であることを特徴とす
る。According to a third aspect of the present invention, there is provided the bonded optical element according to the second aspect, wherein the optical element is an inorganic optical element, and the hardness of the adhesive is 50 or less in Shore D. A is 15 or more and 90 or less.
【００１６】本発明によれば、接着剤の硬度がショアＤ
で５０以下、ショアＡで１５以上９０以下と接着保持力
を有しながら同時に柔軟性をも有するため、比較的脆い
材料である無機光学素子であっても、液晶セルと無機光
学素子との熱膨張係数の差による熱歪みや、加工時の機
械的な残留歪み等の歪みを緩和でき、経時的に液晶セル
や無機光学素子が剥がれたり破損したりすることがな
い。According to the present invention, the hardness of the adhesive is Shore D
In addition to having adhesive holding power of 50 or less and Shore A of 15 or more and 90 or less, it has flexibility at the same time. Distortion such as thermal distortion due to a difference in expansion coefficient and mechanical residual distortion during processing can be reduced, and the liquid crystal cell and the inorganic optical element do not peel or be damaged over time.
【００１７】仮に、接着剤の硬度がショアＤで５０、シ
ョアＡで９０を超えると、柔軟性が乏しくなり上記歪み
を緩和できない。また、ショアＤで５０以下であっても
ショアＡで１５未満であると、凝集力が極度に小さくな
り接着保持力が低下してしまう。If the hardness of the adhesive exceeds 50 for Shore D and 90 for Shore A, the flexibility becomes poor and the distortion cannot be reduced. Further, if the Shore D is less than or equal to 50 and the Shore A is less than 15, the cohesive force becomes extremely small and the adhesive holding force is reduced.
【００１８】無機光学素子としては、水晶、ニオブ酸リ
チウム、酸化チタン、炭酸カルシウム、フッ化マグネシ
ウム、フッ化カルシウム、フッ化バリウム、臭化カリウ
ム等が用いられる。また、接着剤の硬度はその主成分で
あるモノマー、オリゴマーの種類や分子構造、混合比率
といった因子を変えることで調整される。As the inorganic optical element, quartz, lithium niobate, titanium oxide, calcium carbonate, magnesium fluoride, calcium fluoride, barium fluoride, potassium bromide and the like are used. The hardness of the adhesive is adjusted by changing factors such as the types and molecular structures of the monomers and oligomers as the main components and the mixing ratio.
【００１９】[0019]
【発明の実施の形態】（実施の形態１）本発明の実施の
形態１を図１に基づいて説明する。図１は本実施の形態
の接合光学素子を示す縦断面図である。(Embodiment 1) Embodiment 1 of the present invention will be described with reference to FIG. FIG. 1 is a longitudinal sectional view showing the bonded optical element of the present embodiment.
【００２０】本実施の形態の接合光学素子は、図１に示
すように、液晶セル１と、液晶セル２と、前記液晶セル
１との接合面に反射防止コーティングを施したニオブ酸
リチウム結晶４と、このニオブ酸リチウム結晶４とは異
なった結晶軸と厚さを有し、前記液晶セル２との接合面
に反射防止コーティングを施したニオブ酸リチウム結晶
５と、前記ニオブ酸リチウム結晶４，５とは異なった結
晶軸と厚さを有し、前記液晶セル２との接合面に反射防
止コーティングを施したニオブ酸リチウム結晶６とから
なり、液晶セル１とニオブ酸リチウム結晶４を可視光硬
化型の接着剤からなる接着剤層３ａで、ニオブ酸リチウ
ム結晶４とニオブ酸リチウム結晶５を前記接着剤からな
る接着剤層３ｂで、ニオブ酸リチウム結晶５と液晶セル
２を前記接着剤からなる接着剤層３ｃで、液晶セル２と
ニオブ酸リチウム結晶６を前記接着剤からなる接着剤層
３ｄで、それぞれ接合し、前記接着剤層３ａ，３ｂ，３
ｃ，３ｄを硬化させて液晶セル１、ニオブ酸リチウム結
晶４、ニオブ酸リチウム結晶５、液晶セル２、ニオブ酸
リチウム結晶６の順に一体的に構成したものである。As shown in FIG. 1, the junction optical element according to the present embodiment comprises a liquid crystal cell 1, a liquid crystal cell 2, and a lithium niobate crystal 4 having an anti-reflection coating applied to the joint surface between the liquid crystal cell 1 and the liquid crystal cell 1. A lithium niobate crystal 5 having a crystal axis and a thickness different from that of the lithium niobate crystal 4 and having an antireflection coating applied to a joint surface with the liquid crystal cell 2; 5 is made of a lithium niobate crystal 6 having a crystal axis and a thickness different from that of the liquid crystal cell 2 and having an antireflection coating applied to a joint surface with the liquid crystal cell 2. The adhesive layer 3a made of a curable adhesive, the lithium niobate crystal 4 and the lithium niobate crystal 5 are used as the adhesive layer 3b made of the adhesive, and the lithium niobate crystal 5 and the liquid crystal cell 2 are used as the adhesive. In consisting adhesive layer 3c, an adhesive layer 3d comprising a liquid crystal cell 2 and the lithium niobate crystal 6 from the adhesive, respectively bonded, the adhesive layer 3a, 3b, 3
The liquid crystal cell 1, the lithium niobate crystal 4, the lithium niobate crystal 5, the liquid crystal cell 2, and the lithium niobate crystal 6 are integrally formed by curing c and 3d in this order.
【００２１】次に、前記接合光学素子の製造方法を図２
に基づいて説明する。図２（ａ）〜（ｆ）は前記接合光
学素子を製造する工程を示している。Next, a method of manufacturing the bonded optical element will be described with reference to FIG.
It will be described based on. 2 (a) to 2 (f) show a process for manufacturing the bonded optical element.
【００２２】先ず、所定の位置出し治具に、液晶セル１
の接合面１ａを上にして設置する。この接合面１ａに、
図２（ａ）に示すように、可視光硬化型の接着剤３を滴
下し塗布する。そして、図２（ｂ）に示すように、接着
剤３を介在させて液晶セル１の接合面１ａの上に、反射
防止コーティングを施した面を下にして厚さ０．５ｍｍ
以下のニオブ酸リチウム結晶４を載せ、接合面全体を加
圧しながら前記接着剤３からなる接着剤層３ａ中の気泡
を押し出し、接着剤層３ａの厚さを均一にする。同様
に、図２（ｃ）に示すように、ニオブ酸リチウム結晶４
の上面に接着剤３を滴下塗布し、この上に反射防止コー
ティングを施した面を上にして厚さ０．３ｍｍ以下のニ
オブ酸リチウム結晶５を載せ、接合面全体を加圧しなが
ら接着剤層３ｂ中の気泡を押し出し、接着剤層３ｂの厚
さを均一にする。更に、図２（ｄ）に示すように、ニオ
ブ酸リチウム結晶５の上面に接着剤３を滴下塗布し、こ
の上に液晶セル２を載せ、接合面全体を加圧しながら接
着剤層３ｃ中の気泡を押し出し、接着剤層３ｃの厚さを
均一にする。最後に、図２（ｅ）に示すように、液晶セ
ル２の上面に接着剤３を滴下塗布し、この上に、反射防
止コーティングを施した面を下にして厚さ０．６ｍｍ以
下のニオブ酸リチウム結晶６を載せ、接合面全体を加圧
しながら接着剤層３ｄ中の気泡を押し出し、接着剤層３
ｄの厚さを均一にした。本実施の形態では、接着剤層３
ａ，３ｂ，３ｃ，３ｄの厚さは、すべて３〜５μｍとし
た。First, a liquid crystal cell 1 is placed in a predetermined positioning jig.
Is installed with the joint surface 1a facing upward. On this joining surface 1a,
As shown in FIG. 2A, a visible light curable adhesive 3 is applied dropwise. Then, as shown in FIG. 2B, a thickness of 0.5 mm with the surface provided with the antireflection coating facing down on the bonding surface 1a of the liquid crystal cell 1 with the adhesive 3 interposed therebetween.
The following lithium niobate crystal 4 is placed, and air bubbles in the adhesive layer 3a made of the adhesive 3 are extruded while applying pressure to the entire bonding surface to make the thickness of the adhesive layer 3a uniform. Similarly, as shown in FIG. 2C, the lithium niobate crystal 4
An adhesive 3 is applied dropwise onto the upper surface of the substrate, and a lithium niobate crystal 5 having a thickness of 0.3 mm or less is placed thereon with the surface on which the antireflection coating is applied facing upward. Air bubbles in 3b are extruded to make the thickness of the adhesive layer 3b uniform. Further, as shown in FIG. 2 (d), the adhesive 3 is applied dropwise onto the upper surface of the lithium niobate crystal 5, the liquid crystal cell 2 is placed thereon, and the adhesive layer 3 c in the adhesive layer 3 c is pressed while the entire bonding surface is pressed. Air bubbles are extruded to make the thickness of the adhesive layer 3c uniform. Finally, as shown in FIG. 2 (e), an adhesive 3 is applied dropwise onto the upper surface of the liquid crystal cell 2, and a niobium film having a thickness of 0.6 mm or less is placed thereon with the antireflection coating side down. The lithium oxide crystal 6 is placed thereon, and air bubbles in the adhesive layer 3d are extruded while pressing the entire bonding surface, and the adhesive layer 3
The thickness of d was made uniform. In the present embodiment, the adhesive layer 3
The thickness of each of a, 3b, 3c, and 3d was 3 to 5 μm.
【００２３】次に、再度位置出し後、図２（ｆ）に示す
ように、ニオブ酸リチウム結晶６側から、ライトガイド
型の照射装置で、波長４０５ｎｍの可視光を約７０ｍＷ
／ｃｍ２で５秒間照射して接着剤層３ａ，３ｂ，３ｃ，
３ｄを仮硬化させた後、位置出し治具から外して、今度
は液晶セル１側より波長４０５ｎｍの可視光を約７０ｍ
Ｗ／ｃｍ２で４５秒間、更に照射して接着剤層３ａ，３
ｂ，３ｃ，３ｄを本硬化させた。この後、はみ出した接
着剤３を、カッターで削り、除去して、図１に示す接合
光学素子を製作した。Next, after repositioning, as shown in FIG. 2 (f), visible light having a wavelength of 405 nm was applied from the lithium niobate crystal 6 side by a light guide type irradiating device to about 70 mW.
/ Cm 2 for 5 seconds so that the adhesive layers 3a, 3b, 3c,
After pre-curing 3d, remove it from the positioning jig, and then apply visible light having a wavelength of 405 nm from the liquid crystal cell 1 side for about 70 m.
The adhesive layers 3a, 3 were further irradiated with W / cm 2 for 45 seconds.
b, 3c and 3d were fully cured. Thereafter, the protruding adhesive 3 was scraped off with a cutter and removed to produce the bonded optical element shown in FIG.
【００２４】なお、本実施の形態で使用した接着剤３
は、波長４００ｎｍ以上の可視光域に吸収波長を有する
透明な接着剤で、硬化後の硬度は、ショアＡで８８、シ
ョアＤで４５である。また、照射した光は、特に波長４
００ｎｍ未満の光を極力発光しないようなメタルハライ
ドランプにブルーフィルター、反射板や光ファイバーラ
イトガイド等を併用して得られたもので、３６０ｎｍ以
下および６２０ｎｍ以上の波長の光を除去し、４００ｎ
ｍ以下の波長領域に有在するあらゆるピーク波長の強度
が、４００ｎｍ以上５５０ｎｍ以下の波長領域に有在す
るピーク波長の最大強度の２０％未満であるような、可
視光域の光である。The adhesive 3 used in the present embodiment is
Is a transparent adhesive having an absorption wavelength in a visible light region of a wavelength of 400 nm or more. The hardness after curing is 88 for Shore A and 45 for Shore D. The irradiated light has a wavelength of
It is obtained by using a metal halide lamp that does not emit light of less than 00 nm as much as possible with a blue filter, a reflector, an optical fiber light guide, and the like.
It is light in the visible light range such that the intensity of all peak wavelengths existing in the wavelength region of m or less is less than 20% of the maximum intensity of the peak wavelength existing in the wavelength region of 400 nm or more and 550 nm or less.
【００２５】このように、本実施の形態によれば、紫外
線をほとんど用いないため液晶セル１，２を劣化させる
ことなく、可視光は液晶セル１，２によって吸収されな
いため、積層した複数の接着剤層３ａ，３ｂ，３ｃ，３
ｄを短時間で一度に硬化できる上、硬化後の接着剤が適
度の柔軟性を有するため熱応力や残留応力を吸収し、環
境試験中や使用環境中に、経時的に液晶セル１，２や無
機光学素子であるニオブ酸リチウム結晶４，５，６が剥
がれたり破損することのない耐久性の高い接合光学素子
を得ることができた。As described above, according to the present embodiment, since almost no ultraviolet light is used, the liquid crystal cells 1 and 2 are not degraded, and visible light is not absorbed by the liquid crystal cells 1 and 2. Agent layers 3a, 3b, 3c, 3
d can be cured at once in a short time, and since the cured adhesive has appropriate flexibility, it absorbs thermal stress and residual stress. And a highly durable bonded optical element in which the lithium niobate crystals 4, 5, and 6, which are inorganic optical elements, do not peel or break.
【００２６】（比較例１）実施の形態１の接合光学素子
を製作する際に、接着剤として、硬化後の硬度がショア
Ｄで６４およびショアＡで９５以上のものを用い、本比
較例の接合光学素子を製作した。(Comparative Example 1) When the bonded optical element of Embodiment 1 was manufactured, an adhesive having a cured hardness of 64 or more at Shore D and 95 or more at Shore A was used. A junction optical element was manufactured.
【００２７】本比較例の接合光学素子では、実施の形態
１で製作した接合光学素子では何ら問題を生じなかった
−４０℃〜＋８５℃、５０サイクルといったヒートショ
ック試験中に、最も薄いニオブ酸リチウム結晶５にクラ
ックが生じてしまい、使用に耐えなくなった。これは、
試験中の熱応力を接着剤の層で緩和できずに、光学結晶
の破損を招いてしまったものと考えられる。The junction optical element of this comparative example did not cause any problem with the junction optical element manufactured in the first embodiment. The thinnest lithium niobate during the heat shock test at -40 ° C. to + 85 ° C., 50 cycles. Cracks were formed in the crystal 5, and the crystal 5 could not withstand use. this is,
It is probable that the thermal stress during the test could not be alleviated by the adhesive layer, resulting in damage to the optical crystal.
【００２８】（比較例２）実施の形態１の接合光学素子
を製作する際に、接着剤の硬化に使用する可視光とし
て、２００ｎｍ以上４００ｎｍ以下の波長領域にも複数
のピーク波長を有し、その波長領域のピーク波長の最大
強度が、４００ｎｍ以上６２０ｎｍ以下の波長領域のピ
ーク波長の最大強度の約６５％に至るような、紫外光を
多く含む光を用い、本比較例の接合光学素子を製作し
た。(Comparative Example 2) When manufacturing the bonded optical element of Embodiment 1, the visible light used for curing the adhesive has a plurality of peak wavelengths even in a wavelength region of 200 nm to 400 nm, Using a light containing a large amount of ultraviolet light such that the maximum intensity of the peak wavelength in the wavelength region reaches about 65% of the maximum intensity of the peak wavelength in the wavelength region of 400 nm or more and 620 nm or less, the junction optical element of this comparative example is manufactured. Made.
【００２９】本比較例の接合光学素子では、実施の形態
１では組立前後で何ら変化を生じなかった液晶の応答速
度が、最大３０％も低下してしまい、使用に耐えないこ
とが判明した。これは、照射光中の紫外光が液晶物質を
劣化させてしまい、印加電圧に対して反応し難くなって
しまったためと考えられる。In the bonded optical element of this comparative example, it was found that the response speed of the liquid crystal, which did not change before and after the assembly in the first embodiment, was reduced by as much as 30% at the maximum, and was not usable. This is presumably because ultraviolet light in the irradiation light deteriorates the liquid crystal material, making it difficult to respond to an applied voltage.
【００３０】（実施の形態２）本発明の実施の形態２を
図３に基づいて説明する。図３は本実施の形態の接合光
学素子を示す縦断面図である。(Embodiment 2) Embodiment 2 of the present invention will be described with reference to FIG. FIG. 3 is a longitudinal sectional view showing the bonded optical element of the present embodiment.
【００３１】本実施の形態の接合光学素子は、図３に示
すように、液晶セル１１と人工水晶１４と色補正ガラス
１７と人工水晶１５とからなり、液晶セル１１と人工水
晶１４を実施の形態１で使用したものと同じ可視光硬化
型の接着剤からなる接着剤層１３ａで、人工水晶１４と
色補正ガラス１７を前記接着剤からなる接着剤層１３ｂ
で、色補正ガラス１７と人工水晶１５を前記接着剤層１
３ｃでそれぞれ接合し、前記接着剤層１３ａ，１３ｂ，
１３ｃを硬化させて液晶セル１１、人工水晶１４、色補
正ガラス１７、人工水晶１５の順に一体的に構成したも
のである。As shown in FIG. 3, the junction optical element according to the present embodiment includes a liquid crystal cell 11, an artificial quartz crystal 14, a color correction glass 17, and an artificial quartz crystal 15. An adhesive layer 13a made of the same visible light curable adhesive as used in the first embodiment, and the artificial quartz 14 and the color correction glass 17 are bonded to the adhesive layer 13b made of the adhesive.
Then, the color correction glass 17 and the artificial quartz 15 are
3c, and the adhesive layers 13a, 13b,
13c is cured to integrally form the liquid crystal cell 11, the artificial quartz 14, the color correction glass 17, and the artificial quartz 15 in this order.
【００３２】次に、前記接合光学素子の製造方法を説明
する。この接合光学素子の製作の手順は、実施の形態１
と同様、所定の治具上に液晶セル１１の接合面を上向き
にしてセットし、その上面に前記可視光硬化型の接着剤
を滴下塗布し、その上に液晶セル１１との接合面および
前記色補正ガラス１７との接合面の両面に反射防止コー
ティングを施した人工水晶１４を載せて加圧し、液晶セ
ル１１と色補正ガラス１７の両接合面間に介在する接着
剤層１３ａ中の気泡を除去し、所定の接着剤層１３ａの
厚さにする。同様にして、接着剤層１３ｂ、色補正ガラ
ス１７、接着剤層１３ｃ、人工水晶１５と順に積層した
が、本実施の形態でも各々の接着剤層１３ａ，１３ｂ，
１３ｃの厚さを３〜５μｍとした。最後に再度位置出し
後、実施の形態１と同様に、人工水晶１５側から、実施
の形態１と同条件で可視光を照射して接着剤層１３ａ，
１３ｂ，１３ｃを仮硬化し、その後、治具から外して、
更に、液晶セル１１側から可視光を照射し、実施の形態
１と同条件で接着剤層１３ａ，１３ｂ，１３ｃを本硬化
させた。Next, a method for manufacturing the bonded optical element will be described. The procedure for manufacturing this bonded optical element is described in Embodiment 1.
In the same manner as described above, the liquid crystal cell 11 is set on a predetermined jig with the bonding surface facing upward, the visible light-curable adhesive is applied dropwise onto the upper surface thereof, and the bonding surface with the liquid crystal cell 11 and An artificial crystal 14 having an anti-reflection coating on both sides of the bonding surface with the color correction glass 17 is placed and pressed to remove bubbles in the adhesive layer 13a interposed between the liquid crystal cell 11 and the bonding surface of the color correction glass 17. It is removed to a predetermined thickness of the adhesive layer 13a. Similarly, the adhesive layer 13b, the color correction glass 17, the adhesive layer 13c, and the artificial quartz 15 are sequentially laminated. In this embodiment, the adhesive layers 13a, 13b,
The thickness of 13c was 3-5 μm. Finally, after positioning again, as in the first embodiment, visible light is irradiated from the artificial quartz 15 side under the same conditions as in the first embodiment, and the adhesive layer 13a,
13b and 13c are temporarily cured, and then removed from the jig.
Further, visible light was irradiated from the liquid crystal cell 11 side, and the adhesive layers 13a, 13b, and 13c were fully cured under the same conditions as in the first embodiment.
【００３３】このように、本実施の形態によれば、実施
の形態１と同様の効果を奏する接合光学素子を得ること
ができた。As described above, according to the present embodiment, a bonded optical element having the same effects as in the first embodiment can be obtained.
【００３４】[0034]
【発明の効果】以上のように、本発明の接合光学素子お
よびその製造方法によれば、以下のような効果が得られ
る。本発明の請求項１の接合光学素子の製造方法および
請求項２の接合光学素子によれば、紫外線をほとんど有
しない光を用い、液晶セルを劣化させることなく、短時
間で接着剤を硬化できる接合光学素子を提供できる。As described above, according to the bonded optical element and the method of manufacturing the same of the present invention, the following effects can be obtained. ADVANTAGE OF THE INVENTION According to the manufacturing method of the joining optical element of Claim 1 of this invention, and the joining optical element of Claim 2, it is possible to harden the adhesive in a short time without deteriorating the liquid crystal cell using light having almost no ultraviolet rays. A bonded optical element can be provided.
【００３５】本発明の請求項３の接合光学素子によれ
ば、請求項１および請求項２の効果に加え、硬化後の接
着剤が柔軟性を有し、経時的に液晶セルや無機光学素子
が剥がれたり破損することのない接合光学素子を提供で
きる。According to the bonded optical element of the third aspect of the present invention, in addition to the effects of the first and second aspects, the cured adhesive has flexibility, and the liquid crystal cell or the inorganic optical element with the passage of time. Can be provided without peeling or breakage.
【図１】本発明の実施の形態１の接合光学素子を示す縦
断面図である。FIG. 1 is a longitudinal sectional view showing a bonded optical element according to a first embodiment of the present invention.
【図２】本発明の実施の形態１の光学接合素子の製造工
程を示す図である。FIG. 2 is a diagram illustrating a manufacturing process of the optical bonding element according to the first embodiment of the present invention.
【図３】本発明の実施の形態２の接合光学素子を示す縦
断面図である。FIG. 3 is a longitudinal sectional view showing a bonded optical element according to a second embodiment of the present invention.
【符号の説明】 １，２，１１ 液晶セル ３ 接着剤 ３ａ，３ｂ，３ｃ，３ｄ，１３ａ，１３ｂ，１３ｃ 接
着剤層 ４，５，６ ニオブ酸リチウム結晶 １４，１５ 人工水晶 １７ 色補正ガラス[Description of Signs] 1, 2, 11 Liquid Crystal Cell 3 Adhesive 3a, 3b, 3c, 3d, 13a, 13b, 13c Adhesive Layer 4, 5, 6 Lithium Niobate Crystal 14, 15 Artificial Quartz 17 Color Correction Glass
Claims (3)
を接着剤を介して固定する接合光学素子の製造方法にお
いて、 ４００ｎｍ以上の波長の可視光領域に吸収を有する接着
剤を用い、３６０ｎｍ以下および６２０ｎｍ以上の波長
の光が除去され、かつ４００ｎｍ以下の波長領域に存在
するどのピーク波長における強度も、４００ｎｍ以上５
５０ｎｍ以下の波長領域に存在するピーク波長における
最大強度の２０％未満であるような光によって、前記接
着剤を硬化させることで、前記液晶セルの少なくとも一
つの光透過面を前記光学素子に接着することを特徴とす
る接合光学素子の製造方法。1. A method of manufacturing a bonded optical element for fixing at least one liquid crystal cell and an optical element via an adhesive, wherein an adhesive having an absorption in a visible light region having a wavelength of 400 nm or more is used, and 360 nm or less is used. And the intensity at any peak wavelength in the wavelength region of 400 nm or less from which light having a wavelength of 620 nm or more is removed,
By curing the adhesive with light that is less than 20% of a maximum intensity at a peak wavelength existing in a wavelength region of 50 nm or less, at least one light transmitting surface of the liquid crystal cell is bonded to the optical element. A method for manufacturing a bonded optical element, comprising:
によって製造されたことを特徴とする接合光学素子。2. A bonded optical element manufactured by the method for manufacturing a bonded optical element according to claim 1.
記接着剤の硬度がショアＤで５０以下、ショアＡで１５
以上９０以下であることを特徴とする請求項２記載の接
合光学素子。3. The optical element is an inorganic optical element, wherein the hardness of the adhesive is 50 or less in Shore D and 15 in Shore A.
The bonded optical element according to claim 2, wherein the number is 90 or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001066178A JP2002267905A (en) | 2001-03-09 | 2001-03-09 | Joined optical element and method of manufacturing the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001066178A JP2002267905A (en) | 2001-03-09 | 2001-03-09 | Joined optical element and method of manufacturing the same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2002267905A true JP2002267905A (en) | 2002-09-18 |
Family
ID=18924711
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001066178A Pending JP2002267905A (en) | 2001-03-09 | 2001-03-09 | Joined optical element and method of manufacturing the same |
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| Country | Link |
|---|---|
| JP (1) | JP2002267905A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005338679A (en) * | 2004-05-31 | 2005-12-08 | Konica Minolta Opto Inc | Fixing method, and optical part and optical pickup device manufactured by using the same |
| JP2005345497A (en) * | 2004-05-31 | 2005-12-15 | Konica Minolta Opto Inc | Fixing method, optical component and optical pickup device produced using the same |
| WO2011045862A1 (en) * | 2009-10-16 | 2011-04-21 | ソニーケミカル＆インフォメーションデバイス株式会社 | Display device, process for manufacturing same, and transparent resin filler |
| JP2013114007A (en) * | 2011-11-28 | 2013-06-10 | Sharp Corp | Composite optical member, manufacturing method of composite optical member, illumination device and electronic device |
| JP2016029497A (en) * | 2015-10-21 | 2016-03-03 | デクセリアルズ株式会社 | Manufacturing method of display device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000187140A (en) * | 1998-12-24 | 2000-07-04 | Toshiba Corp | Optical device for image forming apparatus |
-
2001
- 2001-03-09 JP JP2001066178A patent/JP2002267905A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000187140A (en) * | 1998-12-24 | 2000-07-04 | Toshiba Corp | Optical device for image forming apparatus |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005338679A (en) * | 2004-05-31 | 2005-12-08 | Konica Minolta Opto Inc | Fixing method, and optical part and optical pickup device manufactured by using the same |
| JP2005345497A (en) * | 2004-05-31 | 2005-12-15 | Konica Minolta Opto Inc | Fixing method, optical component and optical pickup device produced using the same |
| WO2011045862A1 (en) * | 2009-10-16 | 2011-04-21 | ソニーケミカル＆インフォメーションデバイス株式会社 | Display device, process for manufacturing same, and transparent resin filler |
| US9182625B2 (en) | 2009-10-16 | 2015-11-10 | Dexerials Corporation | Display, manufacturing method therefor and transparent resin charging material |
| JP2013114007A (en) * | 2011-11-28 | 2013-06-10 | Sharp Corp | Composite optical member, manufacturing method of composite optical member, illumination device and electronic device |
| JP2016029497A (en) * | 2015-10-21 | 2016-03-03 | デクセリアルズ株式会社 | Manufacturing method of display device |
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