Hung Kuo-Yung, Fan Chao-Chih, Tseng Fan-Gang, Chen Yi-Ko
Institute of Mech. and Electrical Engineering, Ming-Chi Univ. of Technology, Taiwan.
Opt Express. 2010 Mar 15;18(6):6014-23. doi: 10.1364/OE.18.006014.
The purpose of this paper is to use thermal energy and electrostatic force as an alternative to high-cost precision cutting or traditional injection molding in the fabrication of COC (cyclo-olefin copolymer) plastic aspheric bi-convex lenses with high Blu-Ray transmittance (92% at 405 nm). A glass substrate was used, and ultrasonic drilling defined the clear aperture of the aspheric bi-convex lens. The copolymer lens material was measured, filled and melted into the hole. A gradient electrical potential was applied between the top and bottom electrodes of the COC liquid droplet to control the profile of the lens. The thermal energy melted the COC into a dynamic fluid, and the electrostatic force controlled the aspheric morphology of the designed profile. The resulting lenses have a clear aperture of approximately 1.14 mm and a front focal length of 4.97 mm, and the spot size of the fabricated aspheric bi-convex lenses can be controlled to approximately 0.588 microm. This technology is capable of fabricating lenses for application in micro-optical systems.
本文的目的是利用热能和静电力,在制造具有高蓝光透过率(405nm处为92%)的COC(环烯烃共聚物)塑料非球面双凸透镜时,替代高成本的精密切割或传统注塑成型。使用了玻璃基板,通过超声钻孔确定非球面双凸透镜的通光孔径。测量共聚物镜片材料,将其填充并熔化到孔中。在COC液滴的顶部和底部电极之间施加梯度电势,以控制镜片的轮廓。热能将COC熔化成动态流体,静电力控制设计轮廓的非球面形态。所得镜片的通光孔径约为1.14mm,前焦距为4.97mm,制造的非球面双凸透镜的光斑尺寸可控制在约0.588微米。该技术能够制造用于微光学系统的镜片。