應用於雙視角膠囊內視鏡的超緊實照明系統設計

Abstract

我們使用兩個特定的照度分布去補償雙視角膠囊內視鏡的低相對照度。雙視角膠囊內視鏡內部能放置照明系統的空間是有限的，因此LED和二次光學元件的總高度必須是小於2.5mm。這裡使用比例h/D來表示光學緊實度，h是二次光學元件的中心高度，D是光源的最大尺寸。此光學模擬的結果，我們得到光學緊實度h/D是1.6。在前視角範圍的照度均勻度為67.86%和光學效率33.45%。在後視角範圍的照度均勻度為74.92%和光學效率19.32%。總光學效率為52.77%。

We use two prescribed illumination distributions to compensate for the low relative illumination for a dual view capsule endoscope (DVCE). Space within the endoscopic capsule for placement of the illumination system is limited. Thus, the total height of the LED and secondary optical elements (SOE) must be less than 2.5mm within the DVCE. Here the ratio, h/D, indicates the compactness of the optical element, where h is the center height of the optical element and D is the maximal dimension of the source. In the optical simulation, the optical compactness h/D =1.6. We obtain an illumination uniformity of 67.86% and an efficiency of 33.45% for the front view area and an illumination uniformity of 74.92% and an efficiency of 19.32% for the back view area. Total optical efficiency is 52.77%.