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Applied Optics

Applied Optics


  • Editor: Joseph N. Mait
  • Vol. 53, Iss. 1 — Jan. 1, 2014
  • pp: 147–155

Optimal strategy for fabrication of large aperture aspheric surfaces

Yunpeng Feng, Haobo Cheng, Tan Wang, Zhichao Dong, and Hon-Yuen Tam  »View Author Affiliations

Applied Optics, Vol. 53, Issue 1, pp. 147-155 (2014)

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Aspheric surfaces are widely used because of their desirable characteristics. Such a surface can obtain nearly perfect imaging quality with fewer optical elements and reduce the size and mass of optical systems. Various machine systems have been developed based on modern deterministic polishing technologies for large aperture aspheric surfaces. Several factors affect the final precision of large aperture aspheric surfaces, such as the velocity limit of the machine and the path design. Excess velocity, which will be truncated automatically by the computer numerical control system, may cause the dwell time to deviate from the desired time. When a path designed on a two-dimensional surface map with equidistant pitch is projected onto an aspheric surface, the pitch changes as a result of the varied curvature of the aspheric surface. This may affect the removal map and cause some ripple errors. A multiregion distribution strategy, which includes velocity checking, is proposed in this study to avoid exceeding the velocity limits. The strategy can be used to modify local errors and edge effects. A three-dimensional spiral path generation method is also presented using an iterative method to ensure uniformity in the space length of the adjacent circle of the spiral path. This process can reduce the ripple error caused by the overlapping of tool paths. A polishing experiment was conducted, and the results proved the validity of the proposed strategies.

© 2013 Optical Society of America

OCIS Codes
(220.0220) Optical design and fabrication : Optical design and fabrication
(220.1250) Optical design and fabrication : Aspherics
(220.4610) Optical design and fabrication : Optical fabrication

ToC Category:
Optical Design and Fabrication

Original Manuscript: October 4, 2013
Revised Manuscript: November 26, 2013
Manuscript Accepted: November 26, 2013
Published: December 24, 2013

Yunpeng Feng, Haobo Cheng, Tan Wang, Zhichao Dong, and Hon-Yuen Tam, "Optimal strategy for fabrication of large aperture aspheric surfaces," Appl. Opt. 53, 147-155 (2014)

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