- 學位論文
全頻譜發光二極體製作生醫檢測光源之研究
A Study of Bio-medical Light Source Using Full Spectrum LEDs
摘要
傳統生醫檢測燈源多使用氙燈，但由於氙燈壽命短，耗費能量大，所以本研究開發以發光二極體所組成的全頻譜光源來取代傳統氙燈。 首先整合幾何光學的光追跡軟體，以及繞射光學的模擬軟體，設計一個全頻譜燈源與分光模組。透過光學軟體發現LED放置的位置，會跟分光模組中的光柵之分光位置成相對關係。而在光源裡因為有使用暖白的LED，其包含的波段會造成連續性的分光，其容易與其他單一波長的光重疊，因此全頻譜燈源的LED要採用陣列排列，且須按照波長的長短排序，將短波長放至陣列的前端，而長波長放置後端，並將暖白LED包含在中間，以減少光的重疊。使用陣列的全頻譜燈源，且使用擴散型配光曲線的LED搭配反射燈罩，以及PS材料的擴散片放入分光模組中，並以30ﾟ的入射光入射會有較佳的分光品質及聚焦品質。 最後用實驗比對模擬的結果，顯示模擬與實驗高度符合，其驗證了模擬模型的準確性。
並列摘要
Traditional light source for biomedicine investigation is xenon lamp but its lifetime is short and energy-consuming is high. This study developed a light emitting diodes (LEDs) lamp of a lighting source with effective full spectrum to replace conventional xenon lamp. The optical design of the light source with full spectrum was simulated by integrating two software: ray tracing of LighTools and diffractive optics of Rsoft. The location of LEDs influenced the distribution of the spectrum. To develop the light source of full spectrum, white light LED were used with other LEDs with different wavelength. Since the white LEDs have large full width at half maximum (FWHM)，the spectrum of white LED overlapped with spectrum of other LEDs. This result also influenced the distribution of spectrum. Therefore, the LEDs with wide intensity distribution must organize as an array arrangement, LEDs with short wavelength were arranged at front of the array and LEDs with long wavelength were arranged at rear of the array. The white LEDs were arranged between the LEDs with long and short wavelengths. The array of LEDs was equipped with a high reflected lampshade and a diffusion plate to make a LED lamp. The light from the LED lamp was focused to a grating to develop a light source with full spectrum. In this study, simulation and the experiment have shown high consistency.