光固化微压印制品的脱模过程直接关系到制品的质量.利用ABAQUS软件对圆柱微结构阵列的光固化微压印脱模过程进行数值模拟,分析了光固化微压印出现撕裂和断晶缺陷的原因,并利用自制紫外光固化微压印成型实验平台研究了脱模过程对微结构阵列薄膜精度的影响.在光固化微压印脱模过程中,应力集中主要发生在圆柱微结构的表面及根部,当黏附力与摩擦力之和大于制品的内聚力时会带来制品缺陷.

导光板是液晶显示器重要的组成元件之一,光线从侧面耦合进入导光板时,导光板表面的微结构会改变光线的传播路径,使其从导光板出光面(正面)均匀出光,因此导光板表面的微结构是实现均匀出光的关键.基于光学仿真Tracepro软件进行导光板表面的微结构的设计,在保证出光效率的基础上,使导光板的照度均匀度由54.3％提高至80.8％;并且在照度均匀度为80％左右的基础上,在出光面添加微结构,使得出光效率提高至60％.最后采用底面网点微结构远光源处密度大于近光源处密度的排列方式,使得导光板的照度均匀度得到明显提升,最大达到90.2％.

In this paper, the process of preparing of doped diffusion film by ultraviolet curing micro-embossing was studied. The preparation method of microstructure diffusion film by photo-curing micro-embossing is different from the traditional methods. The effect of irradiation time on the apparent quality and the effect of the percentage of light diffusing agent on the optical properties and tensile properties of the diffusion film were investigated. The results shown that under the condition of 365 nm ultraviolet light wavelength and a light intensity of 800 mW/cm2 , the apparent quality of the diffusion film was good. When the irradiation time was 6 s; and the content of the diffusing agent was 30%, the optical performance was relatively good; the larger the content of the light diffusing agent, the smaller the tensile strength of the diffusing film.

采用光固化微压印制备仿生疏水薄膜的工艺方法,制备了具有荷叶表面微结构的聚二甲基硅氧烷(PDMS)软模具,在此基础上,制备了仿生疏水薄膜,探究了紫外光辐照时间、辐照强度等对疏水薄膜水接触角的影响.结果 表明,PDMS模具能够较好地复印荷叶表面的微结构,增加辐照时间和辐照强度改变压印压力可以有效提高疏水薄膜的疏水性,当辐照强度为1 000 mW/cm2、压印压力为0.2 MPa、辐照时间为20 s时,制备的仿生疏水薄膜的表面接触角达到153.5°.

现实场景瞬时多变,快照式光谱成像仪可以获得瞬变目标场景的光谱信息和空间信息.虽然三基色相机只有RGB三个通道,但是曝光时间短,分辨率高.为此,提出一种基于光谱数据库色度匹配的三基色彩色图像多光谱重建模型.通过对比现实场景采集的实际光谱图和重建光谱图,表明该模型能较好的将三基色彩图重建为窄带多光谱图像.