559621 五、發明說明（l) --- 【發明領域】 本發明係關於一種雷射切割菲涅耳透鏡方法，特別 利用自動搜尋系統來定位圓心的雷射切割菲涅耳透鏡方 法。 【習知技術】 大尺寸顯不器在市場上所佔的比例越來越高，而背 影顯不器因為解析度佳以及成本較低的緣故亦受到市場的 重視。 在背投影屏幕中，菲涅耳透鏡之主要功能是將投影機 所投射出的發散光線收集起來，使得發散光線可以進入觀 眾的視角内，達到增加影像亮度的目的。目前大尺寸菲涅 耳透鏡的製造方法有貼模、鑄模、熱壓、光聚合或是使用 反應型樹酯聚合反應等方式，其中除了熱壓以及直接鑄模 之外，都必須將菲涅耳紋路貼在壓克力基板上以形成菲涅 耳透鏡。因此無論貼附所使用的樹酯是反應型壓克力樹酯 或是紫外光硬化樹S旨都必須考慮到與壓克力基板或是其他 板材的界面接著性，才能使菲涅耳紋路與基材緊密黏著在 —起。 菲淫耳透鏡4在成型後必須裁切成有效的區域，一般 係利用連續性金屬線鋸來裁切，此種裁切方式容易在菲漯 耳紋路41與基材42之間形成裂痕43 (如圖ia所示），而水 氣谷易從裂痕43進入（如圖lb所示）並且使裂痕43開始成 長’最後造成菲涅耳紋路41與基材4 2分離（如圖1 c所 示）。而且，在裁切過程中金屬線鋸容易引起揚塵問題，559621 V. Description of the Invention (l) --- [Field of the Invention] The present invention relates to a laser-cut Fresnel lens method, in particular, a laser-cut Fresnel lens method using an automatic search system to locate the center of a circle. [Knowledge technology] Large-size displays are becoming more and more important in the market, and back-view displays are also valued by the market for their high resolution and low cost. In the rear projection screen, the main function of the Fresnel lens is to collect the divergent light projected by the projector, so that the divergent light can enter the viewing angle of the audience to achieve the purpose of increasing the brightness of the image. At present, the manufacturing methods of large-size Fresnel lenses include die-casting, casting, hot-pressing, photopolymerization, or the use of reactive resin polymerization. Among them, in addition to hot-pressing and direct casting, Fresnel patterns must be used. Adhere to an acrylic substrate to form a Fresnel lens. Therefore, no matter whether the resin used for the attachment is a reactive acrylic resin or a UV-curing tree S, the interface adhesion with the acrylic substrate or other plates must be considered to make the Fresnel pattern and The substrate is tightly adhered together. The philanthropic lens 4 must be cut into effective areas after molding. Generally, it is cut with a continuous metal wire saw. This cutting method is easy to form a crack 43 between the philal pattern 41 and the substrate 42 ( As shown in Figure ia), the valley of water and gas easily enters from the crack 43 (as shown in Figure lb) and causes the crack 43 to begin to grow '. Finally, the Fresnel pattern 41 is separated from the substrate 4 2 (as shown in Figure 1c) ). Moreover, the metal wire saw is easy to cause dust problems during the cutting process.
五、發明說明（2) 害’亦造成環保上的 ，容易形成誤差。 問題。再者 對於作業人員的健康有 金屬線鋸的精密度不高 【發明概要】 —種防止裂痕產 射切割菲涅耳透 針對上述問題， 生、不易引起揚塵以 鏡方法。 本發明之目的係提供 及裁切精密度高的雷 …達上述目的，本發明提供一種帝 ::圓包含下列步…“統=菲 鏡之固心；選定菲垣耳透鏡之切割範圍；=-菲>里耳透 割。 及進行雷射切 本發明之雷射切割菲淫耳透鏡 統來定位菲淫耳透鏡之圓心：==動搜尋系 裁切成所需的範圍。與習知技術相::用：；將，"里耳透鏡 與基材的分離丄痕進入1免菲淫耳紋路 切可以增加精密度m; 利用雷射進行裁 【較佳實施例之；細；：r的時間。 ’說明依據本發明實施例之雷射 中相同的元件將以相同的參照符 以下將參照相關圖式 切割菲涅耳透鏡方法，其 號加以說明。 ^ 如圖2所示，佑嫉 — 鏡方法，&含下列/_本發、月貫施例之雷射切割菲淫耳透 定一菲淫耳透$彳乂 〃 .以一自動搜尋系統（未顯示）： 耳透紀之圓心11 (s〇i);選定菲涅耳透嶽 559621 五、發明說明（3) 切割範圍1 2 ( S 0 2 );及進行雷射切割（s 〇 3 )。 於步驟SOI中，將已成型的菲涅耳透鏡1送至雷射切割 平台（未顯示）上’以自動搜尋系統自動對位選出菲涅耳 透鏡1之圓心11位置。於此，菲涅耳透鏡i表面上的紋路（3 可為一同心圓紋路或是螺旋紋路。 菲涅耳透鏡1的製造方法可以是貼模、光聚合、使用 反應型樹酯聚合反應、鎿模或是熱壓等方式。其中，除了 熱壓以及直接鑄模外，都必須將菲涅耳紋路丨3黏著在壓克 力基板1 4上’因此不論是使用反應型壓克力樹酯或是紫外 光硬化型樹醋當作黏著劑，都必須考慮到與壓克力基板工4 或是其他板材（如聚碳酸酯、聚對苯二甲酸乙酯、聚氯乙 稀以及環稀共聚物等等）的界面接著性，才能使菲淫耳紋 路13與基板緊密相黏。 本實施例中之自動搜尋系統係為一影像處理系統，在 此，影像處理系統為一電荷耦合元件（charge c〇uple device，CCD )視覺系統，其係利用電腦視覺運算找出菲 >圼耳透鏡1之圓心11，流程圖如圖3所示。和一般傳統式對 位系統比較起來，電荷耦合元件視覺系統的優點在於幾何 失真少、靈敏度佳、體積小、無殘像以及使用壽命長。 在選出菲涅耳透鏡1之圓心11後，接著選定菲涅耳透 鏡1的切割範圍1 2 (步驟S 0 2 )，如尺寸以及形狀等等。 於步驟SO3中’祠服系統將所獲得的資料移動伺服軸2 控制雷射刀具3進行雷射切割’如圖4所示。其中，所使用 之雷射係為一二氧化破（C02)雷射，二氧化碳雷射是一V. Explanation of the invention (2) Harm 'also causes environmental protection and is easy to form errors. problem. Moreover, the precision of the metal wire saw is not high for the health of the workers. [Summary of the invention]-a method to prevent the production of cracks. Cutting Fresnel. In view of the above problems, it is difficult to cause dust and mirrors. The purpose of the present invention is to provide and cut thunder with high precision ... To achieve the above purpose, the present invention provides an emperor :: The circle includes the following steps ... "Tuning = solid center of Philippine lens; selection of cutting range of Philippine lens; -Philadelphia> Cut through the ear. Laser cutting of the philippine lens system of the present invention to locate the center of the philippine lens: == The dynamic search system is cut to the required range. Technical phase :: use :; "quoting the separation mark between the" Lear lens and the substrate "into the 1-free horn cut can increase the precision m; using laser to cut [preferred embodiment; fine ;: The time of r. 'Describes that the same elements in the laser according to the embodiment of the present invention will be referenced with the same reference numerals, and the Fresnel lens cutting method will be described below with reference to the related figures. ^ As shown in Figure 2, You Jealousy-Mirror Method, & Contains the following / _ This haircut, the month of the implementation of the laser cutting physalis ears set a physalis ears $ 彳 乂 〃. With an automatic search system (not shown): ear penetrating Center 11 (s〇i); selected Fresnel 559621 5. Description of the invention (3) Cutting range 1 2 (S 0 2); and laser cutting (s 〇3). In step SOI, the formed Fresnel lens 1 is sent to a laser cutting platform (not shown) for automatic positioning by the automatic search system The position of the center 11 of the Fresnel lens 1 is selected. Here, the pattern on the surface of the Fresnel lens i (3 can be a concentric circular pattern or a spiral pattern. The manufacturing method of the Fresnel lens 1 can be die attaching, light Polymerization, using reactive resin polymerization, die-casting or hot pressing, etc. In addition to hot pressing and direct casting, Fresnel lines 丨 3 must be adhered to the acrylic substrate 14 ', so regardless of When using reactive acrylic resin or UV-curable tree vinegar as the adhesive, it must be considered with acrylic substrate 4 or other plates (such as polycarbonate, polyethylene terephthalate). , Polyvinyl chloride, dilute copolymer, etc.), so that the phenanthrene pattern 13 and the substrate can be closely adhered. The automatic search system in this embodiment is an image processing system. Here, the image The processing system is a charge-coupled element up device (CCD) vision system, which uses computer vision operations to find the center 11 of the Philip ' s ear lens 1, the flowchart is shown in Figure 3. Compared with the conventional conventional alignment system, the charge-coupled element vision system The advantage is that the geometric distortion is small, the sensitivity is good, the volume is small, there is no residual image and the service life is long. After the center 11 of the Fresnel lens 1 is selected, then the cutting range 1 2 of the Fresnel lens 1 is selected (step S 0 2 ), Such as size and shape, etc. In step SO3, 'the temple service system moves the obtained data to the servo axis 2 and controls the laser cutter 3 to perform laser cutting' as shown in Fig. 4. Among them, the laser system used For CO2 laser, CO2 laser is
五、發明說明（4) 種穩定的高能量光源，所#用 強度。利用雷射把欲切割^ =為10—10_的 中同時將菲淫耳透鏡i的切：Τ切八出來/在裁切的過程 ^ , # e ^ ^ ^ 回尾融’冷卻後完全接著在一 耳紋路1 3盥其效果，緊密的將菲涅耳透鏡1中之菲涅 問題且=:裁著 在裁切過程中菲埋:L為精固度二 具4，如此可避免因移動菲涅 :、動田射刀 題。 斗透釦1而刮倫透鏡表面的問 底材之間產生裂缝的門％。再去 =文。菲沒耳紋路與 不•銘@ 、縫問再者，本貫施例在裁切過程中 :而移動菲涅耳透鏡，可避免菲涅耳透鏡表 通。又，利用雷射切割可以增加裁切的精密度， 切割時間’同時亦可避免因為習知技術中 、:二 的揚塵問題。 刀d所造成 以上所述僅為舉例性，而非為限制 :發明之精神與範嘴，而對其進行之等效；改=脫= 應包含於後附之申請專利範圍中。 /、更句 559621 圖式簡單說明 【圖式之簡單說明】 圖1 a至圖1 c係為示意圖，說明習知技術之雷射切割菲 涅耳透鏡方法。 圖2係為一示意圖，說明本發明之雷射切割菲涅耳透 鏡方法。 圖3係為一流程圖，說明利用電荷耦合元件視覺系統 找出菲涅耳透鏡圓心。 圖4係為一示意圖，說明步驟S 03。 【圖式符號說明】 1 菲涅耳透鏡 11圓心 1 2切割範圍 1 3 菲涅耳紋路 14基板 2 伺服軸 3 雷射刀具 4 菲涅耳透鏡 4 1 菲涅耳紋路 42基材 43裂痕V. Description of the invention (4) Stable high-energy light source, the intensity used. Use the laser to cut the fennel lens i while cutting ^ = 10-10_ at the same time: T cut out eight / in the process of cutting ^, # e ^ ^ ^ back to the melt after cooling and then continue The effect of Fresnel lens 1 is closely related to the effect of Fresnel lens 1 in one ear, and =: The Fresnel is buried during the cutting process: L is the degree of solidity of two, so it can be avoided due to movement. Fresnel :, Doda shots. Buckle through buckle 1 and scratch the surface of the lens. Percentage of doors that have cracks between the substrates. Then go = text. Fremont's pattern and not ming @, ask again, this embodiment is in the cutting process: moving Fresnel lens can avoid Fresnel lens. In addition, the use of laser cutting can increase the precision of the cutting, and the cutting time can also avoid the problem of flying dust due to the conventional technology. Caused by the knife d The above is only exemplary, not limiting: the spirit of the invention and Fan Zui, equivalent to it; change = off = should be included in the scope of the attached patent application. / 、 More sentence 559621 Brief description of the drawings [Simplified description of the drawings] Figures 1a to 1c are schematic diagrams illustrating the laser cutting Fresnel lens method of the conventional technology. Fig. 2 is a schematic diagram illustrating a laser cutting Fresnel lens method of the present invention. Fig. 3 is a flowchart illustrating finding the center of the Fresnel lens using a charge-coupled element vision system. FIG. 4 is a schematic diagram illustrating step S 03. [Illustration of Symbols] 1 Fresnel lens 11 Circle center 1 2 Cutting range 1 3 Fresnel pattern 14 Substrate 2 Servo axis 3 Laser cutter 4 Fresnel lens 4 1 Fresnel pattern 42 Substrate 43 Crack