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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 53, Iss. 3 — Jan. 20, 2014
  • pp: 327–334

Further investigations on fixed abrasive diamond pellets used for diminishing mid-spatial frequency errors of optical mirrors

Zhichao Dong, Haobo Cheng, and Hon-Yuen Tam  »View Author Affiliations


Applied Optics, Vol. 53, Issue 3, pp. 327-334 (2014)
http://dx.doi.org/10.1364/AO.53.000327


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Abstract

As further application investigations on fixed abrasive diamond pellets (FADPs), this work exhibits their potential capability for diminishing mid-spatial frequency errors (MSFEs, i.e., periodic small structure) of optical surfaces. Benefitting from its high surficial rigidness, the FADPs tool has a natural smoothing effect to periodic small errors. Compared with the previous design, this proposed new tool employs more compliance to aspherical surfaces due to the pellets being mutually separated and bonded on a steel plate with elastic back of silica rubber adhesive. Moreover, a unicursal Peano-like path is presented for improving MSFEs, which can enhance the multidirectionality and uniformity of the tool’s motion. Experiments were conducted to validate the effectiveness of FADPs for diminishing MSFEs. In the lapping of a Φ=420mm Zerodur paraboloid workpiece, the grinding ripples were quickly diminished (210 min) by both visual inspection and profile metrology, as well as the power spectrum density (PSD) analysis, RMS was reduced from 4.35 to 0.55 μm. In the smoothing of a Φ=101mm fused silica workpiece, MSFEs were obviously improved from the inspection of surface form maps, interferometric fringe patterns, and PSD analysis. The mid-spatial frequency RMS was diminished from 0.017λ to 0.014λ (λ=632.8nm).

© 2014 Optical Society of America

OCIS Codes
(220.0220) Optical design and fabrication : Optical design and fabrication
(220.4610) Optical design and fabrication : Optical fabrication
(220.5450) Optical design and fabrication : Polishing

ToC Category:
Optical Design and Fabrication

History
Original Manuscript: October 29, 2013
Revised Manuscript: December 4, 2013
Manuscript Accepted: December 4, 2013
Published: January 14, 2014

Citation
Zhichao Dong, Haobo Cheng, and Hon-Yuen Tam, "Further investigations on fixed abrasive diamond pellets used for diminishing mid-spatial frequency errors of optical mirrors," Appl. Opt. 53, 327-334 (2014)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-53-3-327


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