200819770 九、發明說明： 【發明所屬之技術領域】 本發明係關於-種可調式光源裝置及具可調式光源裝置 之自動光學檢測系統，特別係關於一種能產生多角度及多 色度投射光之可調式光源裝置，該多角度及多色度投射光 可用來照明待檢測物。 【先前技術】 印刷電路板是電子、電腦及通信等產品之主要零組件， 為能因應消費市場上輕、薄、短、小之產品特性，及在高 密度及高可靠性的需求催化下，高階印刷電路板在目.前的 發展趨勢已大多使用盲孔（blind h〇le或via)及埋孔（bWed hole)之技術。該種盲孔及埋孔之印刷電路板，是藉由盲孔 將内部幾層之佈線板與表面之佈線連接，不須穿透整個板 子而浪費其他層佈線板之佈局空間，預估可較一般印刷電 路板之體積縮小20%。因此對電路板而言，無論是半成品 或成品之品質檢測工作都變的非常重要，特別是關於線 寬、孔徑、孔垂直度、孔真圓度及銅墊尺寸等都需要進行 量測及規格判讀。然本發明並不限於印刷電路板之鑽孔尺 寸之篁測之應用，及以下習知技術描述之侷限，其他待檢 測物上目標件之尺寸量測及品質判別均為本發明之應用範 圍’例如檢測晶圓（wafer)上的錫球凸塊或基材之缺陷辨識。 圖1係習知綜型掃描視覺檢測系統之外觀示意圖。視覺檢 測系統10包含一可置放待檢測物（例如印刷電路板80)之固 疋平堂90、一產生照射待檢測物光線之光源裝置〗7及一擷 M34288-113357 005672794 200819770 取待檢測物影像之視覺取像模組18，照射於印刷電路板80 之光線有部分被反射至視覺取像模組18内而形成影像。一 般視覺取像模組18至少包括收集反射光線之倍率鏡頭14， 及將光學訊號轉換為電氣訊號之訊號接收器16。又光源裝 置17之兩投射光源12分別會產生兩道對稱於印刷電路板80 之投射光線，並於印刷電路板8〇之表面或鑽孔82形成一聚 焦光線84。為能改變該兩道投射光線之投射角度，可藉由 移動兩投射光源12於調整角度支架12〇上之固定位置或角 度而達成。 雖然藉由該調整角度支架12〇可改變投射光源12產生光 線之投射角度，然該投射角度之變換範圍相當有限而無法 α楚照射某些鑽孔82，很容易受板面不平整（粗糙）而影響取 像品質。投射光源之角度愈垂直，愈易受到受測物表面粗 糙而影響，因此造成明暗交錯之不佳影像。然角度愈水平， 又會因凹陷部分而無法產生反光之困境。圖2係投射光源i 2 產生光線照射雷射鑽孔内部之示意圖。由於部份光線121進 行之方向恰好被鑽孔82之上緣或印刷電路板8〇粗糙表面所 阻擋’因此有相當部分之孔内壁821會因為受光不足而無法 反射足夠之光線121，從而造成視覺取像模組18接受到無法 形成正確鑽孔82影像之反射光線。若每次改變投射光源12 之固定角度以適應不同狀況都需要停機而以機械方式調 整。另外，印刷電路板8〇之表面顏色與光線121之色度亦會 影響鑽孔82之清晰成像，然習知視覺檢測系統1〇並無法針 對待檢測物之色彩特性而給予最佳化之投射光線。例如， M34288-113357 005672794 200819770 待檢測物上畺測目標與背景（板面）之區域雖顏色不同但灰 度值（guy level)相近，則會造成量測目標與背景在一般線 性掃描（line scan)攝影機中成像無法有效鑑別。 、’+上所述，市場上亟需要一種能夠有效調整光源投射方 向兼顧光線色度之自動光學檢測系統，藉此可以確認印刷 電路板及其各疊層板材等待檢測物之品質。 【發明内容】 本發明之目的係提供一種可調式光源裝置及具可調式光 源I置之自動光學檢測系統，可以針對待檢測物產生複數 角度或單角度之投射光，藉此完全改善待檢測物之表面影 像的成像品質，進而提昇品質檢測之準確度。 本發明之另一目的係提供一種光源色度可調整之自動光 學檢測系統，其係藉由調配紅、藍、綠之發光單元之光線 強度而調配光源之色度，可以針對不同顏色之待檢測物產 生不同顏色之投射光，進而能從待檢測物被擷取之影像中 清楚辨識各加工部分。 為達上述目的，本發明揭示一種可調式光源裝置及具可 調式光源裝置之自動光學檢測系統，其係用於照明一待檢 測物之表面，並提供一線性掃描攝影機擷取該待檢測物影 像之光線。該光源裝置係包含複數個光產生器，並可以單 獨控制各光產生器所產生光線之色度及亮度。又各光產生 器發出之狹長帶狀光線係以不同之投射角度照射該待檢測 物。另外，各光產生器係由複數個紅、綠、藍之發光單元 組成，故可分別調整該複數個發光單元發出紅、綠、藍光 200819770 線之強度而產生不同色度之光線。藉由該多角度投射光線 可以克服該待檢測物之粗糙表面不易正確成像之問題，而 色度可調之該投射光線能用來分辨該待檢測物上量測目桿 及背景之顏色。 该自動光學檢測系統係包含一可固定待檢測物之平臺、 視覺取像模組及該光源裝置，其中該視覺取像模組包括 一接受該待檢測物反射之光線而形成影像之線性掃描攝影 機。 / 可藉由一人機介面調整該各對光產生器發出光線之色 度，利用赏幕上紅、監、綠之亮度數值設定拉轴或輸入欄 以混合為合適色度之光線並輸出。或者選擇該人機介面上 建議色度之色塊，該光產生器會自動產生和該選擇色塊相 同色度之光線。 【實施方式】 圖3係本發明具可調式光源裝置之自動光學檢測系統之 不思圖。自動光學檢測系統3〇係包含一可固定待檢測物之 平堂90、一視覺取像模組7〇及一光源裝置31。視覺取像模 組70至）包括收集反射光線之倍率鏡頭71，及將光學訊號 轉換為電氣訊號之訊號接收器72。光源裝置3〗係包含複數 對光產生器，圖中標號311與312、321與322、331與332及 341與342分別為四對獨立控制之第一〜第四光產生器，並可 以單獨調整各對光產生器所產生光線之色度及亮度。另 外，標號 311、312、32卜 322、331、332、341及 342 也可 疋單獨控制之光產生器，並不一定需要兩兩配對為四個被 M34288-113357 005672794 200819770 工㈣^ I對&產生器或各個光產生器發出之光線係以 不同之投射角度照射印刷電路板8〇，且每一對光產生器中 ，兩光產生态產生之光線投射於印刷電路板8〇之方向可以 周正為相互對稱。亚能分別點亮各對光產生器或各個光產 生口.，以針對印刷電路板8〇之表面及鑽孔Μ之輪廊產生多 角度或單角度之最佳化投射光，藉此完全改善待檢測物之 表面心像的成像品質，進而提昇品質檢測之準確度。 _ :見0 4(a)光產生态3 11係於一長條狀之基板42固定複 數個發光二極體元件41，每一發光二極體元件“内有可發 出紅、藍、綠光線之晶粒，因此藉由控制各晶粒之供應電 流就能混合出需要色度之光線。當待檢測物之表面上有綠 色及藍色之兩個區域，若投射於待檢測物之光線固定為白 光時，則會於視覺取像模組70中成像之灰階影像檔中無法 分辨該兩個區域之困境。因此本發明之光源裝置3〗可以根 據檢測之需要，即時變換光產生器3丨丨與3 12發出藍光或綠 _ 光，從而使得該綠色及藍色之兩個區域於影像檔中為灰階 對比清晰可辨之對應兩個面積。 除此之外，如圖4(b)所示，也可將複數個紅光發光二極體 元件41R、綠光發光二極體元件41(3及藍光發光二極體元件 41B分別固定於基板42’上以形成另一種光產生器311，，並個 別控制該三類元件41R、41G及41B之電流以混合出預期色 度之光線。為能增加紅、藍、綠光線混合後之均勻性，可於 該三類元件41R、41G及41B前設置一均光片（(ΐϋί\^Γ)43，從 而使投射光線有著均勻之混色效果。 200819770 圖5係本發明調整投射光線色度之人機介面5〇示意圖。為 能調整該各對光產生器發出光線之色度，可利用螢幕上 紅、藍、綠之壳度數值設定拉軸511、521及531或輸入欄 512、522及532以混合紅、藍、綠光為合適色度之光線並輸 出。或者選擇該人機介面50上建議色度之色塊54,人機介 面50上選定之色塊54轉換為電氣訊號，並經由控制匯流排 (例如RS232)，從而控制該光產生器產生和該選擇色塊“相 同色度之光線。200819770 IX. Description of the Invention: [Technical Field] The present invention relates to an adjustable light source device and an automatic optical detection system with an adjustable light source device, in particular to a multi-angle and multi-color projection light The adjustable light source device can use the multi-angle and multi-color projection light to illuminate the object to be detected. [Prior Art] Printed circuit boards are the main components of products such as electronics, computers and communications. In order to cope with the characteristics of light, thin, short and small products in the consumer market, and under the catalysis of high density and high reliability, The development trend of high-order printed circuit boards in the past has mostly used the techniques of blind holes or vias and bWed holes. The printed circuit board of the blind hole and the buried hole is connected with the wiring of the inner layer by the blind hole, and the layout space of the other layer wiring board is wasted without penetrating the entire board, and the estimated space can be compared. The size of a typical printed circuit board is reduced by 20%. Therefore, for the circuit board, the quality inspection work of semi-finished products or finished products becomes very important, especially regarding the line width, aperture, hole verticality, hole roundness and copper pad size, etc. Interpretation. However, the present invention is not limited to the application of the measurement of the drilling size of the printed circuit board, and the limitations of the following description of the prior art, and the size measurement and quality discrimination of the target member on other objects to be detected are all applicable to the scope of the present invention. For example, detecting the defect identification of a solder ball bump or a substrate on a wafer. Fig. 1 is a schematic view showing the appearance of a conventional scanning type visual inspection system. The visual inspection system 10 includes a solid housing 90 for placing a to-be-detected object (for example, a printed circuit board 80), a light source device for generating a light for illuminating the object to be detected, and a M34288-113357 005672794 200819770 for detecting the object. The image capturing module 18 of the image partially reflects the light that is incident on the printed circuit board 80 into the visual image capturing module 18 to form an image. The general vision imaging module 18 includes at least a magnification lens 14 for collecting reflected light and a signal receiver 16 for converting optical signals into electrical signals. The two projection sources 12 of the light source device 17 respectively generate two projected rays that are symmetric with respect to the printed circuit board 80, and form a focused light 84 on the surface of the printed circuit board 8 or the bore 82. In order to change the projection angle of the two projected rays, the fixed projection position or angle of the angle bracket 12 can be adjusted by moving the two projection sources 12. Although the projection angle of the light generated by the projection light source 12 can be changed by the adjustment angle bracket 12, the conversion range of the projection angle is rather limited, and it is impossible to illuminate certain holes 82, which is easily affected by unevenness of the board surface (rough). And affect the quality of the image. The more vertical the angle of the projection light source is, the more susceptible it is to the rough surface of the object to be measured, thus causing poor images of light and dark interlacing. However, the more horizontal the angle, the more difficult it is to cause reflection due to the concave portion. Figure 2 is a schematic illustration of the projection source i 2 generating light that illuminates the interior of the laser bore. Since the direction of the partial light 121 is exactly blocked by the upper edge of the drilled hole 82 or the rough surface of the printed circuit board 8, a considerable portion of the inner wall 821 of the hole may not reflect enough light 121 due to insufficient light, thereby causing vision. The image capture module 18 receives reflected light that does not form an image of the correct borehole 82. If the fixed angle of the projection source 12 is changed each time to adapt to different conditions, it is necessary to stop and mechanically adjust. In addition, the surface color of the printed circuit board 8 and the chromaticity of the light 121 also affect the clear imaging of the drilled hole 82. However, it is known that the visual inspection system 1 cannot provide an optimized projection for the color characteristics of the object to be detected. Light. For example, M34288-113357 005672794 200819770 The area of the target and the background (board surface) on the object to be detected is different in color but the giu level is similar, which causes the measurement target and the background to be in a linear scan. Imaging in the camera cannot be effectively identified. As described above, there is a need in the market for an automatic optical inspection system that can effectively adjust the projection direction of the light source and the chromaticity of the light, thereby confirming the quality of the printed circuit board and its laminated sheets waiting for the test object. SUMMARY OF THE INVENTION The object of the present invention is to provide an adjustable light source device and an automatic optical detection system with an adjustable light source I, which can generate a plurality of angles or single angles of projection light for the object to be detected, thereby completely improving the object to be detected. The image quality of the surface image improves the accuracy of the quality inspection. Another object of the present invention is to provide an automatic optical detection system with adjustable chromaticity of a light source, which can adjust the chromaticity of the light source by adjusting the light intensity of the red, blue and green light-emitting units, and can be detected for different colors. The object produces different colors of projected light, and thus the processed portions can be clearly identified from the image to be detected. In order to achieve the above object, the present invention discloses an adjustable light source device and an automatic optical detection system with an adjustable light source device for illuminating the surface of a to-be-detected object, and providing a linear scanning camera for capturing the image of the object to be detected Light. The light source device includes a plurality of light generators, and the chromaticity and brightness of the light generated by each of the light generators can be individually controlled. Further, the narrow strip of light emitted by each of the light generators illuminates the object to be detected at different projection angles. In addition, each of the light generators is composed of a plurality of red, green, and blue light-emitting units, so that the plurality of light-emitting units can respectively adjust the intensity of the red, green, and blue light of the 200819770 line to generate light of different chromaticities. The multi-angle projection of light can overcome the problem that the rough surface of the object to be detected is not easily imaged correctly, and the projected light with adjustable chromaticity can be used to distinguish the color of the measuring rod and the background on the object to be detected. The automatic optical detection system includes a platform for fixing a to-be-detected object, a visual image capturing module, and the light source device, wherein the visual image capturing module includes a linear scanning camera that receives light reflected by the object to be detected to form an image. . / The color of the light emitted by each pair of light generators can be adjusted by a human-machine interface, and the pull-axis or input field can be set by using the brightness values of red, monitor and green on the screen to mix and output the light of the appropriate color. Or select the color patch of the recommended color on the man-machine interface, and the light generator will automatically generate the same color of light as the selected color block. [Embodiment] Fig. 3 is an illustration of an automatic optical detecting system with an adjustable light source device of the present invention. The automatic optical detection system 3 includes a flat chamber 90 for fixing the object to be detected, a visual image capturing module 7A, and a light source device 31. The visual imaging module 70 to) includes a magnification lens 71 that collects reflected light, and a signal receiver 72 that converts the optical signal into an electrical signal. The light source device 3 includes a plurality of pairs of light generators, wherein the reference numerals 311 and 312, 321 and 322, 331 and 332, and 341 and 342 are respectively four pairs of independently controlled first to fourth light generators, and can be individually adjusted. The chromaticity and brightness of the light produced by each pair of light generators. In addition, the reference numerals 311, 312, 32, 322, 331, 332, 341, and 342 can also be individually controlled light generators, and do not necessarily need to be paired into four by M34288-113357 005672794 200819770 (4) ^ I pair & The light emitted by the generator or the respective light generators illuminates the printed circuit board 8 at different projection angles, and in each pair of light generators, the light generated by the two light generating states is projected in the direction of the printed circuit board 8 Zhou Zheng is symmetrical to each other. Each of the sub-lights illuminates each pair of light generators or individual light generating ports to achieve a multi-angle or single-angle optimized projection light for the surface of the printed circuit board 8 Μ and the bore of the borehole, thereby completely improving The imaging quality of the surface image of the object to be detected further improves the accuracy of the quality inspection. _ : see 0 4 (a) light-generating state 3 11 is attached to a long strip of substrate 42 to fix a plurality of light-emitting diode elements 41, each of which emits red, blue and green light The crystal grains, so that the light of the required chromaticity can be mixed by controlling the supply current of each of the crystal grains. When the surface of the object to be detected has two regions of green and blue, if the light projected on the object to be detected is fixed In the case of white light, the dilemma of the two regions cannot be resolved in the grayscale image file imaged in the visual image capturing module 70. Therefore, the light source device 3 of the present invention can instantly convert the light generator 3 according to the needs of the detection.丨丨 and 3 12 emit blue light or green _ light, so that the two areas of green and blue are clearly distinguishable between the two areas in the image file. In addition, as shown in Figure 4 (b) As shown, a plurality of red light emitting diode elements 41R, green light emitting diode elements 41 (3 and blue light emitting diode elements 41B can be respectively fixed on the substrate 42' to form another light generator. 311, and individually control the current of the three types of components 41R, 41G, and 41B The light of the desired chromaticity is combined. In order to increase the uniformity of the red, blue and green light mixing, a homogenizing film ((ΐϋί\^Γ)43 can be arranged in front of the three types of components 41R, 41G and 41B, thereby The projection light has a uniform color mixing effect. 200819770 Figure 5 is a schematic diagram of the human-machine interface of the present invention for adjusting the color of the projected light. In order to adjust the chromaticity of the light emitted by the pair of light generators, red and blue on the screen can be utilized. The green shell value sets the pull shafts 511, 521 and 531 or the input fields 512, 522 and 532 to mix the red, blue and green light into the appropriate chromaticity light and output it, or select the recommended chromaticity on the human machine interface 50. The color block 54 and the selected color block 54 on the human interface 50 are converted into electrical signals and controlled via the control bus (e.g., RS232) to control the light generator to generate "the same chromaticity of light as the selected color patch."
本發明之技術内容及技術特點已揭示如上，然而熟悉本 項技術之人士仍可能基於本發明之教示及揭示而作種種不 背離本發明精神之替換及修飾。因此，本發明之保護範圍 應不限於實施例所揭示者，而應包括各種不背離本發明之 替換及修飾，並為以下之申請專利範圍所涵蓋。 【圖式簡單說明】 圖1係習知視覺檢測系統之外觀示意圖； 圖2係圖1中投射光源產生光線照射鑽孔内部之示意圖； 圖3係本發明具可調式光源裝置之自冑光學檢測系統之 示意圖； 圖4(a)〜4(b)係本發明光產生器之上視圖；以及 圖5係本發明調整投射光線色度之人機介面示意圖 【主要元件符號說明】 10 視覺檢測系統 12 14 倍率鏡頭 16 17 光源裝置 18 投射光源 訊號接收器 視覺取像模組 M34288-113357 005672794 -10- 200819770 31 光源裝置 41 發光二極體元件 42 基板 43 均光片 50 人機介面 54 色塊 70 視覺取像模組 71 倍率鏡頭 72 訊號接收器 80 印刷電路板 82 鑽孔 84 聚焦光線 90 平臺 42, 基板 41R 紅光發光二極體元件 41G 綠光發光二極體元件 41B 藍光發光二極體元件 120 調整角度支架 121 光線 311、312、321、322、331、332、341、342 光產生器 511、521、531 紅、藍、綠之亮度數值設定拉軸 511、521、531 輸入攔 821 孔内壁 31Γ 光產生器The technical contents and technical features of the present invention have been disclosed as above, and those skilled in the art can still make various substitutions and modifications without departing from the spirit and scope of the invention. Therefore, the scope of the present invention should be construed as being limited by the scope of the appended claims. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic view showing the appearance of a conventional visual inspection system; FIG. 2 is a schematic view showing the inside of a drilled light generated by a projection light source in FIG. 1; FIG. 3 is a self-twisting optical inspection of the present invention with an adjustable light source device. 4(a) to 4(b) are top views of the light generator of the present invention; and FIG. 5 is a schematic diagram of a human machine interface for adjusting the chromaticity of the projected light according to the present invention. [Main component symbol description] 10 Visual inspection system 12 14 magnification lens 16 17 light source device 18 projection light source signal receiver visual imaging module M34288-113357 005672794 -10- 200819770 31 light source device 41 light-emitting diode element 42 substrate 43 homogenizer 50 human interface 54 color block 70 Vision imaging module 71 magnification lens 72 signal receiver 80 printed circuit board 82 drilling 84 focusing light 90 platform 42, substrate 41R red light emitting diode element 41G green light emitting diode element 41B blue light emitting diode element 120 Adjusting the angle bracket 121 Light 311, 312, 321, 322, 331, 332, 341, 342 Light generator 511, 521, 531 Red, blue, green brightness Value setting pull shaft 511, 521, 531 input block 821 hole inner wall 31 Γ light generator