针对车辆回复反射器光度性能的测试需求, 为了满足测试光源在远距离照射面上高均匀度光斑的要求, 设计一种远距离投射照明光源。光学系统采用了反光碗氙灯光源、导光管以及准直透镜的设计型式, 能够实现光能的有效利用及远距离传输, 可在远距离处形成均匀的接近于平行光的照射面。光学系统设计中加入了旋转调节机构, 可完成照明系统连续调焦功能, 能够实现在远距离照射面上对均匀光斑尺寸进行连续调节, 在照明距离为30 m~40 m的不同照射面上均得到不同尺寸的均匀光斑, 照射面上Φ250 mm~Φ300 mm内的光斑不均匀性小于5%。

In order to meet requirements of photometric performance of vehicle retroreflector, logn-range projection lighting source is designed to meet requirement of high uniformity spot on long-range illumination surface of test light source. Using reflective bowl xenon light source, light guide tube and collimator lens as design type, optical system can achieve effective use of light and long-range transmission, and can be formed at a distance close to parallel light irradiation surface. Besides, optical system is equipped with a rotary adjustment mechanism to complete continuous focusing function of lighting system and can realize continuous adjustment of uniform spot size on long-range illumination surface. On different irradiation surfaces with illumination distance of 30 m~40 m, this system can obtain different sizes of uniform spots, and spot unevenness is less than 5% in irradiation surface Φ250 mm ~ Φ300 mm.