光源模组与色轮的制作方法;Illumination Module and Manufacturing Method of Color Wheel

摘要

一种光源模组包含光源、色轮、致动器与反射单元。光源提供具第一波段之光束。色轮于光路上与光源对应设置，具有外圈与内圈，内圈之半径小于外圈之半径。色轮包含波长转换区与复数个滤光区。波长转换区置于外圈，用以将部分之第一波段光束转换为第二波段光束。波长转换区具有波长转换材料，其包含钇铝石榴石萤光粉。滤光区置于内圈，用以过滤出所欲波段之光束。反射单元于光路上与色轮对应设置，用以反射穿透色轮外圈之光束至色轮内圈。于同一时序中，光束打至色轮内圈之位置系介于光束打至色轮外圈之位置与色轮之轴心之间。;An illumination module includes a light source, a color wheel, an actuator, and a reflecting unit.The light source provides a light beam with a first wavelength band.The color wheel is disposed correspondingly to the light source, and has an outer annular section and an inner annular section.The radius of the inner annular section is smaller than that of the outer annular section.The color wheel includes a wavelength conversion segment and a plurality of filter segments.The wavelength conversion segment is disposed at the outer annular section, and is configured to convert part of the light beam having the first wavelength band into one having a second wavelength band.The wavelength conversion segment includes wavelength conversion materials such as YAG phosphors.The filter segments are disposed at the inner annular section and are configured to filter desired portions of the light beam.The reflecting unit is disposed correspondingly to the color wheel, and is configured to reflect the light beam passing through the outer race annular section of the color wheel to the inner annular section of the color wheel.In the same time period, a position that the light beam impinges on the inner annular section of the color wheel is located between a position that the light beam impinges on the outer annular section of the color wheel and a center of the color wheel.