A hyperspectral light source based on light pipe is proposed with attributes of compact size, uniform illumination, and versatility. Theoretically, the deflection angle for off-axis LEDs is introduced as a parameter to adjust the uniformity. Besides, by deriving the planar irradiance distribution relationship for a tilt incident source, the flip-n-fold approach is extended to analyze the proposed layout structure. Experimentally, a system with 27 independent narrowband is optimized, fabricated and verified for uniformity illumination. Furthermore, two additional capabilities are also demonstrated, including: extending illumination area by repeatedly splicing identical light pipes, and color-mixing to simulate wideband spectrum such as sunlight.

提出了一种基于光管的高光谱光源，具有体积小、照明均匀、通用性强的特点。理论上，离轴 LED 的偏转角被引入作为调整均匀性的参数。此外，通过推导出倾斜入射源的平面辐照度分布关系，将翻转 n 折叠方法扩展到分析所提出的布局结构。实验上，优化、制造和验证了具有 27 个独立窄带的系统，以实现均匀照明。此外，还展示了两个额外的功能，包括：通过重复拼接相同的光管来扩展照明区域，以及通过混色来模拟宽带光谱，例如太阳光。