Subaperture polishing of silicon asphere

  • Amitava GhoshEmail author
  • Neeraj Pandey
  • K. K. Pant
  • Devendra Mohan
Research Article


Subaperture polishing of silicon aspheric optics using air-inflated membrane tool is reported in the present work. A faster approach for material removal has been applied for local material removal using inflated bonnet polishing tool. Optical quality surface finish on silicon asphere is obtained by applying more pressure and greater velocity on subaperture tool with less distortion on the polishing surface as compared to a larger tool. Further, less tool wear cost makes this process more economical for lower production requirements. The linear feed rate has been optimized to produce optical quality surface finish using less number of iterations. Stylus profilometer and optical profilometer have been used for aspheric surface characterization. The surface accuracy and surface roughness achieved are 127 nm and 1.44 nm, respectively.


Asphere Polishing Material removal 



The authors are thankful to Mr. Benjamin Lionel, Director IRDE, Dehradun, for his support and constant encouragement during the course of this work.


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Copyright information

© The Optical Society of India 2019

Authors and Affiliations

  • Amitava Ghosh
    • 1
    Email author
  • Neeraj Pandey
    • 1
  • K. K. Pant
    • 1
  • Devendra Mohan
    • 2
  1. 1.Instruments Research and Development EstablishmentDehradunIndia
  2. 2.GJUS&THissarIndia

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