Analytical process design for chemo-mechanical polishing of glass aspheres

Daniel Waechter; Olaf Dambon; Fritz Klocke

doi:10.1117/12.893300

26 September 2011 Analytical process design for chemo-mechanical polishing of glass aspheres

Daniel Waechter, Olaf Dambon, Fritz Klocke

Proceedings Volume 8126, Optical Manufacturing and Testing IX; 81260L (2011) https://doi.org/10.1117/12.893300
Event: SPIE Optical Engineering + Applications, 2011, San Diego, California, United States

Abstract

This work deals with the chemo-mechanical sub-aperture polishing of glass lenses using spiral tool path and pressure-inflated membrane tools. Current trends in manufacturing precision optics in Europe go to smaller lot sizes and an increasing ratio of custom specific lens design. This requires deterministic processes as well as methods for an analytical process set-up without empirical try-outs. Chemo-mechanical polishing is typically applied for pre-polishing step, which aims for smoothing the surface with moderate shape correction. But due to kinematic effects the spiral-polishing process often shows changes in the radius of curvature, which are right now corrected by empirical try-outs and iterative corrections. This paper suggests an analytical tool for the compensation of these effects and contributes doing so to an efficient pre-polishing of aspheres. A mathematical model calculates the local distribution of material removal. It is based on Preston's equation and takes into account the influence of the major input parameters, such as feed rate, spindle revolutions and spot size. The given results show a significant reduction in shape deviation applying this methods compared to a polishing process without any compensation.

Citation Download Citation

Daniel Waechter, Olaf Dambon, and Fritz Klocke "Analytical process design for chemo-mechanical polishing of glass aspheres", Proc. SPIE 8126, Optical Manufacturing and Testing IX, 81260L (26 September 2011); https://doi.org/10.1117/12.893300

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available