| 摘要: | 摘要
2014年TI德州儀器開發出藍光雷射加上螢光粉的組合光源用於投影機後，雷射螢光玻璃(PIG, Phosphor in Glass)成為重要的光學元件；燒結PIG製作上的瓶頸有：製程繁複、結構難控制、特殊形狀製作困難、加工成本高、高溫燒結耗能、光效率不佳等造成應用上的侷限。
本論文以粒徑15μm的YAG 550nm螢光粉，以低溫反應製程製作雷射螢光玻璃LT-PIG，以2W波長450nm的藍光雷射照射，在穿透厚度0.49mm後，色溫維持在4300K以上，發光角可達150°。(如表七、照射單一顆粒時分析所得到的參數表)
整體的優點有：
(1)大散光角度；傳統PIG出光角小於90°需靠透鏡散光，LT-PIG不需靠透
鏡，出光角度就可達150°。
(2)低溫製程簡單、快速、精準、節能、低成本；可以印刷、沉積、鑄模、
模壓等多元工法製作。
(3)無機玻璃材料可耐400°C以上高溫；無黃化及質變問題。
(4)容易製作曲面、特殊形狀及製作在透鏡表面等應用。
(5)光效率高；內部均勻混合結構，無須經過透鏡即可形成漫射效果得到大
的出光角。
(6)縮小鏡頭；LT-PIG螢光膜可以做在透鏡表面，收斂出光角度不會因光
程或鏡頭收光尺寸不夠大產生的光損耗，可讓鏡頭尺寸縮到最小。
(7)光源參數調制容易；配合入射藍光強度，調整螢光粉的粒徑、膜厚及固
含量比例很容易可控制色溫、出光角度、光形、光強度。
綜上所述LT-PIG已具備完整實用條件，可以改善現有PIG瓶頸，再配合相關結構設計將是理想的光源選擇。
;Abstract
In 2014, TI Texas Instruments developed a combination of blue laser and phosphor powder as a light source for projectors. Laser phosphor glass (PIG, Phosphor in Glass) became an important optical component; the bottlenecks in sintered PIG production are: The complicated process, difficult to control the structure, difficult to manufacture special shapes, high processing cost, high-temperature sintering energy consumption, and poor optical efficiency have caused limitations in applications.
In this paper, YAG 550nm phosphor powder with a particle size of 15μm is used to make LT-PIG laser fluorescent glass with a low-temperature reaction process. It is irradiated with a blue laser beam with a wavelength of 2W and 450nm. After penetrating a thickness of 0.49mm, the color temperature is maintained at 4300K , The luminous angle is above 150°.
The overall advantages are:
(1) Large astigmatism angle; the traditional PIG light angle is less than 90° depends on the lens astigmatism, LT-PIG does not need the lens, the light angle can reach 150°.
(2) The low-temperature process is simple, fast, accurate, energy-saving, and low-cost; it can be produced by multiple methods such as printing, deposition, casting, and molding.
(3) Inorganic glass materials can withstand high temperatures above 400°C; no yellowing and qualitative problems.
(4) It is easy to make curved surface, special shape and make on lens surface and other applications.
(5) High light efficiency; the internal uniform mixing structure can form a diffusion effect without going through the lens to obtain a large light angle.
(6) Reduce the lens; LT-PIG fluorescent film can be made on the surface of the lens, and the convergence angle of the light will not be caused by the optical loss due to the optical path or the lens receiving size is not large enough, which can minimize the size of the lens.
(7) It is easy to modulate the parameters of the light source; it is easy to adjust the particle size, film thickness and solid content ratio of the phosphor according to the intensity of the incident blue light. It is easy to control the color temperature, light angle, light shape and light intensity.
In summary , LT-PIG already has complete practical conditions, which can improve the existing PIG bottleneck, and then cooperate with related structural design will be the ideal light source choice. |
