论文部分内容阅读
为了填补我国学术界和产业界在压贴三棱镜的国产化设计、制作以及测试等方面工作的空白,研究了压贴三棱镜镜片结构设计理论,并推导了压贴三棱镜镜片透过率以及畸变的计算公式,数值模拟了不同材料、不同棱镜度数的压贴三棱镜的透过率以及压贴三棱镜的畸变情况.数值模拟结果表明:与现有PVC材料相比,PMMA材料具有更大的阿贝系数和更小的材料吸收率,是一种制作低成本压贴三棱镜的理想材料.利用金刚石切割工艺制作出精密的压贴三棱镜模版,模版的表面光洁度达到14级,并采用热压工艺,在温度为180℃压力为130kg/cm2的工艺参数下制作出不同棱镜度数的压贴三棱镜样片,验证了以PMMA材料为基材、采用热压工艺制作压贴三棱镜的可行性.为了测试压贴三棱镜样片的实际棱镜度(Δ),自主设计并搭建了压贴三棱镜棱镜度测量系统.实验结果表明:对低(10Δ)、中(20Δ)、高(30Δ)三组压贴三棱镜样片的棱镜度测试结果与理论值的偏差分别为0.01Δ、0.04Δ和0.02Δ.所有样品的棱镜度偏差均符合国家医用棱镜的标准.因此,所制作的压贴三棱镜样片具有较高的光线偏折精度,为治疗儿童斜视疾病提供了一种高质量、低成本的产品方案.
In order to fill the gaps in the domestic design, fabrication and testing of pressed prisms by academia and industry in China, the structural design theory of pressed prisms has been studied and the calculation of the transmissivity and distortion of the pressed prism has been derived The numerical simulation results show that the transmittance of PMMA with different materials and different prism degrees and the distortion of the pressed prism are numerically simulated.The numerical results show that the PMMA material has a larger Abbe number and The smaller material absorption rate is a kind of ideal material for making low-cost pressure-coated triangular prisms, which uses diamond cutting technology to produce a precise pressure-sensitive prism plate, the surface finish of the stencil reaches 14, and adopts hot pressing process, 180 ℃ under the pressure of 130kg / cm2 under the process parameters to produce a different degree of Prism Prism Prism sample to verify the PMMA material as a substrate, the use of hot pressing process to make pressing Prism feasibility. The actual prisms (Δ) were designed and set up independently.The experimental results show that for the low (10Δ), medium (20) ), And the prism test results of the high (30Δ) three-pressed prisms are 0.01Δ, 0.04Δ and 0.02Δ, respectively. The prisms deviations of all the samples are in line with the national standards for medical prisms. Therefore, The manufactured pressed triangular prism sample has high light deflection accuracy and provides a high quality and low cost product solution for the treatment of strabismus in children.