基于LED光源的投影LOGO灯设计

根据固体照明LED光源的特点，文中提出了一款基于3.5×3.5 mm朗伯体LED光源的紧凑型投影LOGO灯系统。利用成像设计软件Code V设计一个两片式成像系统，该系统物距为2 900 mm，像距为15 mm，像高为5.792 6 mm。根据光路可逆原理，给该成像系统匹配一个准直度高、均匀度高的光源，在LigtTools软件中设计了一个分级准直透镜组，LED光源经过准直后角度为4.2°，光斑均匀度达到了91.7%。将两个子系统结合在一起，可以在2 900 mm远的接受面投影出菲林的完整清晰的均匀图案，图案直径为1 600 mm。与现有的系统相比，此系统长度短、结构简单、投影图案均匀度高。

Design of Projection LOGO Lamp Based on LED Light Source

According to the characteristic of LED light source, here presented a compact projection of LOGO lamp based on 3.5×3.5 mm Lambert emission LED light source. Using Code V designed a two-slice imaging system, the object distance is 2900 mm, the image distance is 15 mm, and the image height is 5.7926 mm. According to the reversibility of optical path, To match a light source with small angle and high uniformity for the imaging system, a two-slice collimate system was designed in LightTools. The angle of light is 4.2°after the collimation, and the uniformity reached 91.7%. At last, put the two subsystems into LightTools, the results with a complete and clear uniform-pattern, the diameter of the pattern is 1600mm on the receiving plane, which was 2900 mm away from the entire system. Compared with the current systems, it has the advantages of shorter length, more simple structure and high uniformity.