JPS63109043A - Manufacture of fresnel lens plate - Google Patents
Manufacture of fresnel lens plateInfo
- Publication number
- JPS63109043A JPS63109043A JP25504286A JP25504286A JPS63109043A JP S63109043 A JPS63109043 A JP S63109043A JP 25504286 A JP25504286 A JP 25504286A JP 25504286 A JP25504286 A JP 25504286A JP S63109043 A JPS63109043 A JP S63109043A
- Authority
- JP
- Japan
- Prior art keywords
- fresnel lens
- lens plate
- resin composition
- base
- resin
- 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
- 238000004519 manufacturing process Methods 0.000 title claims description 13
- 239000011347 resin Substances 0.000 claims abstract description 26
- 229920005989 resin Polymers 0.000 claims abstract description 26
- 239000011342 resin composition Substances 0.000 claims abstract description 14
- 238000000137 annealing Methods 0.000 claims abstract description 9
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 claims description 15
- 239000000758 substrate Substances 0.000 claims description 10
- 238000000465 moulding Methods 0.000 claims description 3
- 238000001125 extrusion Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 8
- 238000003825 pressing Methods 0.000 abstract description 3
- 229920000915 polyvinyl chloride Polymers 0.000 abstract 2
- 239000004800 polyvinyl chloride Substances 0.000 abstract 2
- 238000010438 heat treatment Methods 0.000 description 4
- 239000003431 cross linking reagent Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000314 lubricant Substances 0.000 description 2
- -1 maleic acid ester Chemical class 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 239000004014 plasticizer Substances 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 239000003381 stabilizer Substances 0.000 description 2
- MQIUGAXCHLFZKX-UHFFFAOYSA-N Di-n-octyl phthalate Natural products CCCCCCCCOC(=O)C1=CC=CC=C1C(=O)OCCCCCCCC MQIUGAXCHLFZKX-UHFFFAOYSA-N 0.000 description 1
- OFOBLEOULBTSOW-UHFFFAOYSA-N Propanedioic acid Natural products OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- BJQHLKABXJIVAM-UHFFFAOYSA-N bis(2-ethylhexyl) phthalate Chemical compound CCCCC(CC)COC(=O)C1=CC=CC=C1C(=O)OCC(CC)CCCC BJQHLKABXJIVAM-UHFFFAOYSA-N 0.000 description 1
- ZPOLOEWJWXZUSP-WAYWQWQTSA-N bis(prop-2-enyl) (z)-but-2-enedioate Chemical compound C=CCOC(=O)\C=C/C(=O)OCC=C ZPOLOEWJWXZUSP-WAYWQWQTSA-N 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 239000011976 maleic acid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000010583 slow cooling Methods 0.000 description 1
- 238000010557 suspension polymerization reaction Methods 0.000 description 1
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/02—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles
- B29C43/021—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles characterised by the shape of the surface
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2011/00—Optical elements, e.g. lenses, prisms
- B29L2011/0016—Lenses
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2011/00—Optical elements, e.g. lenses, prisms
- B29L2011/0016—Lenses
- B29L2011/005—Fresnel lenses
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明はフレネルレンズ板の製造法に関し、詳しくは、
リヤ型プロジェクションスクリーン用として用いられ、
特に垂直拡散レンチキュラーレンズ板と組み合わせて使
用するフレネルレンズ板の製造法に関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a method for manufacturing a Fresnel lens plate, and in detail,
Used for rear projection screens,
In particular, it relates to a method of manufacturing a Fresnel lens plate for use in combination with a vertically diffusing lenticular lens plate.
テレビジョンや映画の画像を拡大投影して画像観賞を行
うプロジェクションスクリーンとして、入力光例の面を
平面とし、その反対側の面にフレネルレンズを設けたフ
レネルレンズ板と、レンチキュラーレンズを設けたレン
チキュラーレンズ板とをそれぞれ別体として構成し、そ
の両者を、上記フレネルレンズ板が入力光側に位置する
よう組み合わせて使用するものが知られている。As a projection screen that magnifies and projects television or movie images for viewing, we use a Fresnel lens plate with a flat input light surface and a Fresnel lens on the opposite surface, and a lenticular lens with a lenticular lens. It is known that the Fresnel lens plate and the lens plate are constructed separately and used in combination so that the Fresnel lens plate is located on the input light side.
上記プロジェクションスクリーンは、片面にフレネルレ
ンズを設け、その反対面にレンチキュラーレンズを設け
て一体として構成したプロジェクションスクリーンのよ
うにフレネルレンズにおいて入力光の損失が生じ、スク
リーンの四隅が暗くなるという問題点は解消されるもの
の、第２図に示すようにフレネルレンズ板４に集光され
た入力光５がフレネルレンズ６部分からでる際、光線が
全く出ない影の部分７（斜線部分）が生じ、この部分が
次に位置するレンチキュラーレンズ板を透過することに
より重なり合って発現する影縞模様、いわゆるモアレ縞
が生じるという欠点がある。The above-mentioned projection screen has the problem that input light is lost in the Fresnel lens and the four corners of the screen become dark, as in a projection screen that is integrated with a Fresnel lens on one side and a lenticular lens on the other side. However, as shown in FIG. 2, when the input light 5 focused on the Fresnel lens plate 4 exits from the Fresnel lens 6 part, a shadowed part 7 (shaded part) is created where no light rays come out. There is a drawback that shadow stripes, so-called moiré stripes, are produced when the portions pass through the next lenticular lens plate and overlap.
そこで各方面にて研究がなされた結果、表面部分が艶消
し加工されたプロジェクションスクリーンが上記問題点
を解消するために存効であることが見出され、上記加工
を施した各種プロジェクションスクリーンの製造が試み
られた。例えば、レンチキュラーレンズ板の改良がなさ
れたものとしては、光拡散材粒子を多量に混入してレン
チキュラーレンズ板を製造し、モアレ縞のコントラスト
を低減させるものがあるが、この場合、スクリーン自体
の光線透過率が下がり、映像が暗くなるという問題が生
じる。一方、フレネルレンズ板の改良がなされたものと
しては、フレネルレンズ板のフレネルレンズ表面に艶消
し塗料を塗布して艶消し加工を行うもの、或いは型内表
面に微細凹凸を設けたフレネルレンズ成形用金型を用い
てフレネルレンズ板の表面を微細凹凸面としたものが存
在する。しかしながらこれらの場合においても、塗布の
不均一性によりムラが生じたり、均一な微細凹凸を安定
的に設けることができないため、いずれの方法によって
もモアレ縞を充分に低減させることのできるフレネルレ
ンズ板を得ることができなかった。As a result of research conducted in various fields, it was discovered that a projection screen with a matte surface finish was effective in solving the above problems, and various projection screens with the above process were manufactured. was attempted. For example, some improvements have been made to lenticular lens plates in which a large amount of light diffusing material particles are mixed into the lenticular lens plate to reduce the contrast of moiré fringes. A problem arises in that the transmittance decreases and the image becomes dark. On the other hand, improved Fresnel lens plates include those that apply a matte paint to the surface of the Fresnel lens to give it a matte finish, or those that have fine irregularities on the inner surface of the mold for molding Fresnel lenses. There is a method in which the surface of a Fresnel lens plate is made into a finely uneven surface using a mold. However, even in these cases, unevenness may occur due to non-uniformity of coating, and it is not possible to stably provide uniform fine irregularities. I couldn't get it.
本発明は上記の点に鑑みなされたもので、光学的特性が
損なわれず且つ均一な表面艶消し加工を施することによ
りモアレ縞の発生を極力低減させることができるフレネ
ルレンズ板の製造法を提供することを目的とする。The present invention has been made in view of the above points, and provides a method for manufacturing a Fresnel lens plate that does not impair optical properties and can minimize the occurrence of moire fringes by applying a uniform surface matte finish. The purpose is to
即ち、本発明は部分的に架橋された塩化ビニル系樹脂を
主成分とした樹脂組成物を押出し成形して樹脂シートを
成形し、次いで、該シートをフレネルレンズ成形用金型
を用いてプレスカｌ工してフレネルレンズ板基体を成形
し、しかる後、上記樹脂組成物の軟化温度範囲における
下方頭載温度でアニーリング処理を施して上記フレネル
レンズ板基体の表面の艶消し加工を行うことを特徴とす
るフレネルレンズ板の製造法を要旨とする。That is, the present invention involves extruding a resin composition mainly composed of partially crosslinked vinyl chloride resin to form a resin sheet, and then prescaling the sheet using a Fresnel lens mold. The method is characterized in that the Fresnel lens plate substrate is molded by annealing treatment at a lower head temperature within the softening temperature range of the resin composition to make the surface of the Fresnel lens plate substrate matte. This article summarizes the method for manufacturing Fresnel lens plates.
以下、本発明の詳細な説明する。 The present invention will be explained in detail below.
本発明の製造法は、まず、部分的に架橋された塩化ビニ
ル系樹脂を主成分とした樹脂組成物を押出し成形して樹
脂シートを成形する。上記の部分的に架橋された塩化ビ
ニル系樹脂とは、架橋された樹脂と無架橋の樹脂とが混
在した塩化ビニル系樹脂のことであり、樹脂全体として
の架橋度が１〜２０％のものをいう、具体的には例えば
、架橋した塩化ビニル系樹脂と無架橋の塩化ビニル系樹
脂とを混合してなるものや、或いは添加する架橋剤の添
加量を調整して一部を架橋させた塩化ビニル系樹脂等が
挙げられる。上記部分的に架橋された塩化ビニル系樹脂
にはマレイン酸エステル系、フクル酸エステル系等の架
橋剤を添加することができ、その添加量は０．０２〜０
．５重量部が好ましく、架橋剤の他にも必要に応じて、
安定剤、滑剤、可塑剤等を添加することができる。In the manufacturing method of the present invention, first, a resin sheet is formed by extrusion molding a resin composition containing a partially crosslinked vinyl chloride resin as a main component. The partially crosslinked vinyl chloride resin mentioned above is a vinyl chloride resin that is a mixture of crosslinked resin and non-crosslinked resin, and has a crosslinking degree of 1 to 20% as a whole. Specifically, for example, it is made by mixing a crosslinked vinyl chloride resin and a non-crosslinked vinyl chloride resin, or it is partially crosslinked by adjusting the amount of the crosslinking agent added. Examples include vinyl chloride resins. A crosslinking agent such as a maleic acid ester type or a fucuric acid ester type can be added to the above partially crosslinked vinyl chloride resin, and the amount added is 0.02 to 0.
．． 5 parts by weight is preferred, and in addition to the crosslinking agent, if necessary,
Stabilizers, lubricants, plasticizers, etc. can be added.
上述の塩化ビニル系樹脂を主成分とした樹脂組成物を用
いて、シートを成形するための通常の押出し機にて押出
し成形を行い、樹脂シートを成形する。上記シートの厚
さは０．５〜２ｍｓが好ましい。A resin sheet is formed by extruding a resin composition containing the above-mentioned vinyl chloride resin as a main component using an ordinary extruder for forming sheets. The thickness of the sheet is preferably 0.5 to 2 ms.
次に、上記樹脂シートを、所定形状のフレネルレンズを
成形するため該形状と逆形状の型内面を有したフレネル
レンズ成形用金型を用い、該金型と鏡面板との間に挟持
してプレス加工を行い、片面が平面であり、その反対面
にフレネルレンズが成形されたフレネルレンズ板基体を
得る。プレス加工は、加熱１３０〜１８０℃、圧力５０
〜２００ ｋｇ ／ ｃｄ、プレス時間１５〜６０分の
条件下で行うことが好ましい。Next, in order to mold a Fresnel lens of a predetermined shape, the resin sheet is sandwiched between the mold and a mirror plate using a Fresnel lens molding mold having an inner surface of the mold having an opposite shape to the shape. Pressing is performed to obtain a Fresnel lens plate substrate having a flat surface on one side and a Fresnel lens molded on the opposite surface. Pressing is performed by heating at 130-180℃ and pressure at 50℃.
It is preferable to carry out under the conditions of ~200 kg/cd and press time of 15 to 60 minutes.
次に、上記フレネルレンズ仮基板にアニーリング処理を
施して該基体表面の艶消し加工を行い、これにより本発
明製造法によるフレネルレンズ板が得られる。アニーリ
ング処理は加熱、徐冷を行うことにより樹脂成形品の表
面部分の粗面化（結晶化）を図り、表面を均一な艶消し
状態とするものである。そのため、上記処理は前記した
樹脂組成物の軟化温度のうちで低い方の温度、即ち、下
方領域にある温度にて加熱を行い、しかる後、例えば室
温付近まで徐冷を行う、従って、アニーリング処理にお
ける加熱温度は、樹脂組成物の主成分が部分的に架橋さ
れた塩化ビニル系樹脂であるため８０〜１３０℃が好ま
しい。Next, the Fresnel lens temporary substrate is subjected to an annealing treatment to make the surface of the substrate matte, thereby obtaining a Fresnel lens plate according to the manufacturing method of the present invention. The annealing treatment is performed by heating and slow cooling to roughen (crystallize) the surface portion of the resin molded product and make the surface uniformly matte. Therefore, in the above treatment, heating is performed at the lower of the softening temperatures of the resin composition, that is, at a temperature in the lower region, and then slowly cooling is performed, for example, to around room temperature.Therefore, annealing treatment is performed. The heating temperature in is preferably 80 to 130°C since the main component of the resin composition is a partially crosslinked vinyl chloride resin.
上記構成からなる本発明製造法により得られたフレネル
レンズ板は、レンチキュラーレンズが設けられたレンチ
キュラーレンズ板と組み合わされ、第１図に示すように
光源１ （例えば、ＣＲＴ）側に平面が面するように位
置させてフレネルレンズ板２を設置し、該光源１側とは
反対側にフレネルレンズ板２に隣接させてレンチキュラ
ーレンズ板３を設置することによりプロショクタースク
リーンとして使用する。上記フレネルレンズ板は光源か
らの入力光により影の部分を発生する要素は残存するが
、フレネルレンズ板から出る際、入力光が艶消し加工さ
れた表面部分にて拡散されるという作用により影の部分
となる部分にも光線が満たサレ、その結果、モアレ縞の
コントラストは大幅に低減され、映像観賞上、支障の虞
れのない程度のものとなる。The Fresnel lens plate obtained by the manufacturing method of the present invention having the above configuration is combined with a lenticular lens plate provided with a lenticular lens, and the plane faces the light source 1 (for example, CRT) side as shown in FIG. A Fresnel lens plate 2 is installed so as to be positioned as shown in FIG. The Fresnel lens plate mentioned above still has elements that generate shadows due to the input light from the light source, but when it exits the Fresnel lens plate, the input light is diffused by the matte surface area, which causes shadows to be created. As a result, the contrast of the moiré fringes is significantly reduced to a level that does not pose a problem when viewing the image.
次に、具体的実施例を挙げて本発明を更に詳細に説明す
る。Next, the present invention will be explained in more detail by giving specific examples.
塩化ビニル樹脂に０．１重量部のマレイン酸ジアリルエ
ステルを添加し懸濁重合させて部分的に架橋させた塩化
ビニル重合体を主成分とした下記組成からなる樹脂組成
物を用いて、押出し機にて厚さｌ ｍ＠の樹脂シートを
成形した。Using a resin composition having the following composition as a main component, which is a partially crosslinked vinyl chloride polymer obtained by adding 0.1 parts by weight of maleic acid diallyl ester to a vinyl chloride resin and subjecting it to suspension polymerization, an extruder was used. A resin sheet with a thickness of 1 m@ was molded.
「樹脂組成物」
塩化ビニル重合体 １００重量部すず系安定
剤 ３．０重１部滑剤
１．２重量部可塑剤（ジオクチルフタレー
ト）２．０重量部上記シートをフレネルレンズ成形用金
型と鏡面板との間に挟み、１５０℃にて加熱してプレス
加工（圧力１００ｋｇ／ｃ＋Ｊ、時間３０分）を行い、
フレネルレンズ板基板を成形した。"Resin composition" Vinyl chloride polymer 100 parts by weight Tin stabilizer 3.0 parts by weight 1 part Lubricant
1.2 parts by weight Plasticizer (dioctyl phthalate) 2.0 parts by weight The above sheet was sandwiched between a Fresnel lens mold and a mirror plate, heated at 150°C and pressed (pressure 100 kg/c + J, time 30 minutes),
A Fresnel lens plate substrate was molded.
ここで、得られたフレネルレンズ板基板の一部をフレネ
ルレンズ板とし、それをレンチキュラーレンズスクリー
ンと組み合わせてプロジェクションＴＶに使用したとこ
ろ、強いモアレ縞の発生が確認された。Here, when a portion of the obtained Fresnel lens plate substrate was used as a Fresnel lens plate and used in a projection TV in combination with a lenticular lens screen, the occurrence of strong moire fringes was confirmed.
次いで、上記基体を該基体の一端を吊り下げた状態で９
０℃のオーブン中で１時間加熱し、しかる後、室温まで
冷却してアニーリング処理を施し、フレネルレンズ板を
得た。Next, the above-mentioned base body was held at 9°C with one end of the base suspended.
It was heated in an oven at 0° C. for 1 hour, and then cooled to room temperature and subjected to an annealing treatment to obtain a Fresnel lens plate.
上記製造法にて得られたフレネルレンズ板は、均一に艶
消し状態となった表面を有するものであることが確認さ
れた。また、上記レンズ板をレンチキュラーレンズ板と
組み合わせプロジェクションＴＶに使用したところ、モ
アレ縞のコントラストは低減され、大幅に改善された良
好な映像を観賞することができた。It was confirmed that the Fresnel lens plate obtained by the above manufacturing method had a uniformly matte surface. Furthermore, when the above lens plate was used in a projection TV in combination with a lenticular lens plate, the contrast of moiré fringes was reduced and it was possible to view a significantly improved and good image.
〔発明の効果〕
以上説明したように、本発明フレネルレンズ板の製造法
は部分的に架橋された塩化ビニル系樹脂を主成分とした
樹脂組成物からなるフレネルレンズ板基板を所定温度に
てアニーリング処理するため、光学的特性の劣化がなく
、均一で良質の艷消し加工された表面を有するフレネル
レンズ板を容易且つ安定的に製造することができるとい
う優れた効果がある。[Effects of the Invention] As explained above, the method for manufacturing the Fresnel lens plate of the present invention involves annealing a Fresnel lens plate substrate made of a resin composition mainly composed of partially crosslinked vinyl chloride resin at a predetermined temperature. Because of the treatment, there is no deterioration in optical properties, and there is an excellent effect that a Fresnel lens plate having a uniform and high-quality brushed surface can be easily and stably manufactured.
また、本発明製造法によって得られるフレネルレンズ板
はレンチキュラーレンズ板と組み合わせてプロジェクシ
ョンスクリーンとして使用した場合、モアレ縞の発生を
極力低減させることができ、その結果、鮮明で良好な画
像を得ることができる利点がある。Furthermore, when the Fresnel lens plate obtained by the manufacturing method of the present invention is used in combination with a lenticular lens plate as a projection screen, the occurrence of moire fringes can be minimized, and as a result, clear and good images can be obtained. There are advantages that can be achieved.
第１図は本発明製造法により得られたフレネルレンズ板
を実際に使用した状態を示す説明略図、第２図は従来の
フレネルレンズ板により発生する影の部分（モアレ縞）
を示す要部説明略図である。
２・・・フレネルレンズ讐反Fig. 1 is an explanatory diagram showing the state in which the Fresnel lens plate obtained by the manufacturing method of the present invention is actually used, and Fig. 2 is the shadow area (moire fringes) caused by the conventional Fresnel lens plate.
It is a schematic diagram illustrating the main parts. 2...Fresnel Lens Rebellion
Claims (1)
脂組成物を押出し成形して樹脂シートを成形し、次いで
、該シートをフレネルレンズ成形用金型を用いてプレス
加工してフレネルレンズ板基体を成形し、しかる後、上
記樹脂組成物の軟化温度範囲における下方領域温度でア
ニーリング処理を施して上記フレネルレンズ板基体の表
面の艶消し加工を行うことを特徴とするフレネルレンズ
板の製造法。A resin sheet is formed by extrusion molding a resin composition mainly composed of partially crosslinked vinyl chloride resin, and then the sheet is pressed using a Fresnel lens mold to form a Fresnel lens plate. A method for producing a Fresnel lens plate, comprising molding a substrate, and then performing an annealing treatment at a temperature in a lower region within the softening temperature range of the resin composition to matte the surface of the Fresnel lens plate substrate. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25504286A JPS63109043A (en) | 1986-10-27 | 1986-10-27 | Manufacture of fresnel lens plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25504286A JPS63109043A (en) | 1986-10-27 | 1986-10-27 | Manufacture of fresnel lens plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63109043A true JPS63109043A (en) | 1988-05-13 |
Family
ID=17273354
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25504286A Pending JPS63109043A (en) | 1986-10-27 | 1986-10-27 | Manufacture of fresnel lens plate |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63109043A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2359171A2 (en) * | 2008-12-16 | 2011-08-24 | Microsoft Corporation | Fabrication of optically smooth light guide |
-
1986
- 1986-10-27 JP JP25504286A patent/JPS63109043A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2359171A2 (en) * | 2008-12-16 | 2011-08-24 | Microsoft Corporation | Fabrication of optically smooth light guide |
| JP2012512075A (en) * | 2008-12-16 | 2012-05-31 | マイクロソフト コーポレーション | Production of optical smooth light guide |
| EP2359171A4 (en) * | 2008-12-16 | 2014-10-22 | Microsoft Corp | Fabrication of optically smooth light guide |
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