Algorithm for stylus instruments to measure aspheric surfaces

Byong Chon Park; Y. W. Lee; Chang-ock Lee; Kilsu Park

doi:10.1117/12.574290

10 February 2005 Algorithm for stylus instruments to measure aspheric surfaces

Byong Chon Park, Y. W. Lee, Chang-ock Lee, Kilsu Park

Proceedings Volume 5638, Optical Design and Testing II; (2005) https://doi.org/10.1117/12.574290
Event: Photonics Asia, 2004, Beijing, China

Abstract

A reliable algorithm was developed for the analysis of the machined aspheric surfaces with the stylus instrument. The research has been done as a prior step, with the intent to evaluate the uncertainties in the aspheric surfaces analysis as well as to make the applications that the commercial instruments cannot provide with its own code implemented inside. The algorithm considered two important factors in the instrument-calibration and the aspheric analysis: pickup configuration (pivoted arm) and the stylus radius. It also compensates for the sample tilt and axis offset due to the setup error in the analysis of aspheric surface. The algorithm has been coded by means of C++ and MATLAB. The algorithm was also applied to the real measurement, and compared with the instrument-produced results. Our algorithm found calibration constants better fitting the calibration ball in the instrument-calibration without noticeable cost of the speed. In conclusion, the developed algorithm can cover, and further, shows better performance over the commercial one in both of the instrument-calibration and analysis of aspheric surfaces.

Citation Download Citation

Byong Chon Park, Y. W. Lee, Chang-ock Lee, and Kilsu Park "Algorithm for stylus instruments to measure aspheric surfaces", Proc. SPIE 5638, Optical Design and Testing II, (10 February 2005); https://doi.org/10.1117/12.574290

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