Long-Stroke Fast Tool Servo for Diamond Turning of Asymmetric Optics

该项目将设计、构建和测试一种新型的快速刀具伺服机构，用于纳米分辨率的大振幅不对称表面的金刚石车削。它的动机是对无旋转对称轴的光学表面日益增长的需求。这类表面的例子包括眼镜和隐形眼镜、人体晶状体植入物、激光眼科手术元件、消费者和专业相机中的组件，以及半导体光刻步进器和扫描仪、激光打印机和其他图像处理设备中的图像训练元件。目前，低振幅不对称元件（500微米）可以在商用机器上使用压电驱动的快速刀具伺服制造。然而，目前还没有一种设备可以实现更大的行程长度以及必要的加速度和定位精度，以制造具有明显不对称性的切割功能光学器件。如果成功，该项目成果将填补当前制造能力的重大空白，并允许各种新型光学系统的经济生产。

This project will design, build, and test a novel fast-tool servomechanism for nanometer-resolution diamond turning of large-amplitude asymmetric surfaces. It is motivated by the increasing need for optical surfaces with no axis of rotational symmetry. Examples of this type of surface include spectacle and contact lenses, human lens implants, elements for laser eye surgery, and components in consumer and professional cameras, as well as image-train elements in devices such as semiconductor photolithographic steppers and scanners, laser printers, and other image processing equipment. At present, elements with low-amplitude asymmetry ( 500 micrometers) can be fabricated on commercially available machines using a piezoelectrically driven fast tool servo. However, no device existing at present can achieve significantly larger stroke lengths along with the necessary accelerations and positioning accuracy to fabricate as-cut functional optics with significant asymmetry. If successful, the project result will fill the significant gap in current manufacturing capabilities and allow the economical production of a wide variety of novel optical systems.