Kinematic characterization of a polishing machine for the design of petal tools and its application in the parabolization of reflective optical surfaces
G.Baldwin, J.Ochoa, F.Gonzales
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Base Information
Volume
V58 - N2 / 2025 Ordinario
Reference
51175
DOI
http://dx.doi.org/10.7149/OPA.58.2.51175
Language
Spanish
Keywords
Petal-type tool, spherical mirror, parabolic mirror, Ronchi test, polishing, optical manufacture
Abstract
In this work, the results of the manufacture of a parabolic mirror with a diameter of 140mm with a focal ratio of f/8.5 are presented using a petal-type tool. The petal–type tool transforms a polished surface initially as a spherical surface to a surface with a parabolic profile. The kinematic of the PUCP Optical Workshop main polishing machine is obtained and via a roughing simulation of the spherical surface based on this kinematics, the shape of tool petal is obtained to convert the spherical surface into a parabolic one. The evaluation of the parabolic surface was carried outgraphic-visually, comparing the real patterns of the Ronchi test with the patterns obtained by simulation. The simulation of the Ronchi patterns was carried out using the "Ronchi for Windows" software.
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