Single-Point Diamond Turning of Features with Large Azimuthal Slope

American Society for Precision Engineering (ASPE)


Molded plastic optics, specifically anamorphic and freeform components, have become almost exclusively reliant on single-point diamond turning of molds and masters. Since diamond turning is a deterministic process, it can integrate mechanical and optomechanical features into the same machining operation and guarantee alignment with optical surfaces. With the advent of slow tool servo (STS) and fast tool servo (FTS) machining processes, it became possible to diamond turn non-rotationally symmetric optical surfaces and other features. However, STS and FTS are both limited by tool clearance when surfaces become steep in the azimuthal (rotational) direction. Large primary clearance tools are one way to address this, but those tools are costly, can be time consuming to manufacture, and have fragile edges susceptible to wear and damage. Diamond milling is another possibility for dealing with large azimuthal slopes, but this usually comes at the price of diminished surface roughness and surface figure error related to long cycle times. We present here a process for diamond turning steep azimuthal slopes using conventional diamond turning tools by taking advantage of multi-axis motions available on diamond turning machines with a vertical Y-axis.

Related Publications

All Publications

I3DA - September 8, 2021

Binaural Reproduction From Microphone Array Signals Incorporating Head-Tracking

Lior Madmoni, Jacob Donley, Vladimir Tourbabin, Boaz Rafaely

SID - September 25, 2020

Vergence-Accommodation Conflicts in Augmented Reality: Impacts on Perceived Image Quality

Ian M. Erkelens, Kevin Mackenzie

IROS - September 29, 2021

Constant Fluidic Mass Control for Soft Actuators Using Artificial Neural Network Algorithm

Heng Xu, Priyanshu Agarwal, Benjamin Stephens-Fripp

VSS - May 21, 2021

Modeling visual search in naturalistic virtual reality environments

Angela Radulescu, Bas van Opheusden, Fred Callaway, Thomas Griffiths, James Hillis

To help personalize content, tailor and measure ads, and provide a safer experience, we use cookies. By clicking or navigating the site, you agree to allow our collection of information on and off Facebook through cookies. Learn more, including about available controls: Cookie Policy