- 學位論文
光學級封裝鏡頭設計與非成像系統的應用
Optical Package Lens Design and Application to Non-imaging Optical System
摘要
本研究的主題是利用封裝光學鏡頭設計開發不同應用於非成像系統的領域近年來發光二極體半導體產業的快速發展下應用的領域越來越廣泛，相對在不同應用領域的非成像光學也不盡相同，與因此造就了光學產業在非成像領域的商機與光學技術的發展。也因此這幾年開始聚焦在發光二極體半導體產業和非成像光學產業的技術結合研究，期望在發光二極體半導體封裝時就可以把光學設計的技術導入其中，讓發光二極體半導體產業甚至未來的有機發光二極體和半導體雷射新興光源技術在發展時可以和非成像光學進行技術的發展與整合，如此可以提升台灣在發光二極體的半導體產業的技術層次。 本研究聚焦在使用發光二極體光學級封裝材料進行光學設計，其在進行光學設計時只有材料光學折射率和光學表面曲率半徑等少數的參數可以進行設計調整，我認為這是和二次光學元件設計時相對困難的地方，並且還要考慮到封裝製程的可行性。目前我們利用光學級封裝鏡頭設計的技術，應用到室內照明和道路照明產品的設計，其中在道路照明要求的二方向性蝙蝠翼光型特性，利用封裝鏡頭設計的技術大幅薄型化路燈的厚度並且在戶外較為嚴苛的耐候性也大幅的提升。接下來我們也在薄型化可撓白光封裝上進行開發並且把封裝鏡頭的技術進行結合，可撓白光封裝的總厚度可以控制在小於1mm，並且搭配改善熱阻後的基板，可應用在未來幾年後技術成熟的Micro LED Display上。 其次在非可見光的紅外線領域，依據攝像機的CMOS Sensor的尺寸和取像時在水平和垂直視角的要求下，利用封裝鏡頭把紅外線光線調整成矩形光型進行紅外線的輻射，其水平和垂直的輻射角度調整成4:3或16:9的比例和攝像機的收光視角進行匹配，如此可以大幅提升紅外線的有效利用率和影像的亮度均勻度，我們把攝像機拍攝的影像進行直方式影像處理，可以發現矩形光型照射下所拍攝的影像，平均亮度提升了25%和亮度均勻度也從0.47提升到0.714；也因為封裝鏡頭技術的關係，目前監視器產業也逐漸開始淘汰二次光學元件，把紅外線光源當作一般的電子元件進行產品設計，整體的產品在光機設計和外觀設計上更為美觀簡潔。另外，在機車車燈產品設計上也導入封裝鏡頭設計的技術並且和魚眼鏡頭設計做結合，利用封裝鏡頭先把車燈的光型進行排列設計，最後再讓魚眼鏡頭進行投射至25公尺的位置，如此大幅改善車燈的尺寸並且在有效利用光線下，車燈模組更為節能。
並列摘要
The research purpose is design optical package lens. Under the rapid development of light-emitting diode semiconductor industry in past years, the applications have become broader. The application of non-imaging optics would not be the same in various fields that the business opportunity of optical industry in non-imaging field and the development of optical technology are created. As a result, research on the technical combination of light-emitting diode semiconductor industry and non-imaging optics industry is focused, expecting to introduce optical design into light-emitting diode semiconductor package and allow the development and integration of light-emitting diode semiconductor industry with non-imaging optics in the future development of organic light-emitting diode and the emerging light sources of semiconductor laser. It would promote the technology of light-emitting diode in semiconductor industry in Taiwan. This study focuses on the optical design in the use of light-emitting diode optical package materials, where merely few parameters of optical refractive index and optical surface radius of curvature could be designed and adjusted. It is considered as the difficulty in the secondary optical element design; besides, the practicability of package process should be taken into account. By applying optical package lens design to the design of indoor lighting and street lighting products, the two-direction batwing light characteristics required for street lighting could largely enhance the strict weather resistance with the package lens design to largely thin the thickness of street lights. The development on thinning flexible white light package is further combined with package lens technology to reduce the total thickness of flexible white light package below 1mm. Moreover, the substrate with improved thermal resistance could be applied to the mature micro LED displays in the future. According to the CMOS sensor size of cameras and the requirements of being under horizontal and vertical angle of view during image capture in the non-visible infrared field, package lenses are utilized for adjusting the infrared light into rectangular light patterns for the infrared radiation. The horizontal and vertical radiation angles are adjusted the proportion of 4:3 or 16:9 to match the viewing angle of the camera. It would largely enhance the effective utilization of infrared and the uniformity of image brightness. By preceding the histogram image processing of images taken by the camera, it is discovered that the images taken under the irradiation of rectangular light patterns are promoted the average brightness 25% and the uniformity of brightness is enhanced from 0.47 to 0.714. Due to package lens technology, secondary optical elements are gradually eliminated from monitor industry. Infrared light is regarded as a general electronic component for the product design to have the entire product be more beautiful and simple on the opto-mechanical design and appearance design. Furthermore, the package lens design technology is also introduced to the product design of motorcycle headlamps and is combined with fish-eye lens design. Package lenses are first utilized for the arrangement and design of the headlamp pattern which is then projected to the position of 25m through the fish-eye lens. The headlamp would be more energy-saving under such large improvement of headlamp size and effective utilization of light.