Abstract

In the present research, a new bending system using a segmented vacuum chuck for Stressed Mirror Polishing (SMP) is developed. SMP is a special fabrication method for thin aspheric mirrors, where simple flat or spherical fabrication is applied while a mirror blank is deflected. Since a mirror blank is usually glued to a bending fixture in the conventional SMP process, there are drawbacks such as long curing time, inconvenience of mirror replacement, risk of mirror breakage, and stress concentration near the glued area. To resolve the drawbacks, a new bending system is designed to effectively hold a mirror blank by vacuum. For the developed bending system, the optimal bending load to achieve the designated mirror deflection is found by finite element analysis and an optimization algorithm. With the measurement results of the deflected mirror surfaces with the optimal bending loads, the feasibility of the developed bending system is investigated. As a result, it is shown that the bending system is appropriate for the SMP process.

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  1. B. SchmidtA coma free telescopeMitt. Hamb. Strenv.1932715
  2. E. EverhartMaking corrector plates by Schmidt’s vacuum methodAppl. Opt.1966591360
  3. G. LemaltreNew procedure for making schmidt corrector platesAppl. Opt.197211716301636
  4. J. Lubliner and J. E. NelsonStressed mirror polishing. 1: A technique for producing nonaxisymmetric mirrorsAppl. Opt.1980191423322340
  5. J. E. Nelson, G. Gabor, L. K. Hunt, J. Lubliner, and T. S. MastStressed mirror polishing. 2: Fabrication of an off-axis section of a paraboloidAppl. Opt.1980191423412352
  6. T. S. Mast and J. E. NelsonThe fabrication of large optical surfaces using a combination of polishing and mirror bendingProc. SPIE19901236670681
  7. L. Golden, P. Gillett, R. Radau, J. Richardson, and G. PoczulpStressed mirror polishing experiment underway at kitt-peak-national-observatoryProc. SPIE19820332357365
  8. E. Hugot, M. Ferrari, D. Fappani, and R. ArsenaultActive polishing of a 2 mm thin shell for large adaptive secondary mirrorsProc. SPIE2006627262724Z
  9. S. F. SporerTMT: stressed mirror polishing fixture studyProc. SPIE2006626762672R
  10. J. Daniel, U. Mueller, T. Peters, S. F. Sporer, and T. HullTinsley progress on stress mirror polishing (SMP) for the Thirty Meter Telescope (TMT) primary mirror segments IIProc. SPIE20107733773328
  11. E. Hugot, M. Ferrari, A. Riccardi, M. Xompero, G. R. Lemaître, R. Arsenault, and N. HubinStress polishing of thin shells for adaptive secondary mirrorsAstron. Astrophys2011527A4
  12. M. Laslandes, N. Rousselet, M. Ferrari, E. Hugot, J. Floriot, S. Vivès, G. Lemaitre, J. F. Carré, and M. CayrelStress polishing of E-ELT segment at LAM: full-scale demonstrator statusProc. SPIE20118169816903
  13. X. Li, Z. Jiang, X. Gong, H. Zhang, K. Chen, Y. Zheng, B. Li, B. Yu, C. Xu, B. Ji, and Q. XuStressed mirror annular polishing for scale-down TMT primary segmentsProc. SPIE2016991299120A
  14. C. Li, B. Lei, and Y. HanThe advancement of the high precision stress polishingProc. SPIE2016968396831F
  15. J. Z. Bo, L. X. Nan, Y. B. Bin, Z. Yi, and L. BoInfluence and control of spherical aberration in polishing off-axis aspherical mirrors by the stressed methodAppl. Opt.2015542291298
  16. Y. Han and L. LuStressed mirror polishing: finite element simulation of mirror blank deformationProc. SPIE2014928192810W
  17. E. Hugot, A. Bernard, M. Laslandes, J. Floriot, T. Dufour, D. Fappani, J. M. Combes, and M. FerrariStress polishing demonstrator for ELT M1 segments and industrializationProc. SPIE20149145914539
  18. R. Izazaga-Pérez, D. Aguirre-Aguirre, F. Granados-Agustín, and M. Percino-ZacaríasOptical testing and finite element analysis applied in stressed mirror polishingProc. OSA2014OM3C.6
  19. L. Xin-nan, Z. Hai-ying, C. Xiang-qun, J. Zi-bo, Z. Yi, L. Xing-tao, and N. Hou-kunStudy on the stressed mirror polishing with a continuous polishing machine for large aperture off-axis aspheric mirrorsChin. Astron. Astrophys2012364435444
  20. C. Pruss, E. Garbusi, and W. OstenTesting aspheresOpt. Photon. News20081942429
  21. S. P. Timoshenko and S. Woinowsky-KrigerTHEORY OF PLATES AND SHELLSMcGraw-Hill1959

Other (21)

B. SchmidtA coma free telescopeMitt. Hamb. Strenv.1932715

E. EverhartMaking corrector plates by Schmidt’s vacuum methodAppl. Opt.1966591360

G. LemaltreNew procedure for making schmidt corrector platesAppl. Opt.197211716301636

J. Lubliner and J. E. NelsonStressed mirror polishing. 1: A technique for producing nonaxisymmetric mirrorsAppl. Opt.1980191423322340

J. E. Nelson, G. Gabor, L. K. Hunt, J. Lubliner, and T. S. MastStressed mirror polishing. 2: Fabrication of an off-axis section of a paraboloidAppl. Opt.1980191423412352

T. S. Mast and J. E. NelsonThe fabrication of large optical surfaces using a combination of polishing and mirror bendingProc. SPIE19901236670681

L. Golden, P. Gillett, R. Radau, J. Richardson, and G. PoczulpStressed mirror polishing experiment underway at kitt-peak-national-observatoryProc. SPIE19820332357365

E. Hugot, M. Ferrari, D. Fappani, and R. ArsenaultActive polishing of a 2 mm thin shell for large adaptive secondary mirrorsProc. SPIE2006627262724Z

S. F. SporerTMT: stressed mirror polishing fixture studyProc. SPIE2006626762672R

J. Daniel, U. Mueller, T. Peters, S. F. Sporer, and T. HullTinsley progress on stress mirror polishing (SMP) for the Thirty Meter Telescope (TMT) primary mirror segments IIProc. SPIE20107733773328

E. Hugot, M. Ferrari, A. Riccardi, M. Xompero, G. R. Lemaître, R. Arsenault, and N. HubinStress polishing of thin shells for adaptive secondary mirrorsAstron. Astrophys2011527A4

M. Laslandes, N. Rousselet, M. Ferrari, E. Hugot, J. Floriot, S. Vivès, G. Lemaitre, J. F. Carré, and M. CayrelStress polishing of E-ELT segment at LAM: full-scale demonstrator statusProc. SPIE20118169816903

X. Li, Z. Jiang, X. Gong, H. Zhang, K. Chen, Y. Zheng, B. Li, B. Yu, C. Xu, B. Ji, and Q. XuStressed mirror annular polishing for scale-down TMT primary segmentsProc. SPIE2016991299120A

C. Li, B. Lei, and Y. HanThe advancement of the high precision stress polishingProc. SPIE2016968396831F

J. Z. Bo, L. X. Nan, Y. B. Bin, Z. Yi, and L. BoInfluence and control of spherical aberration in polishing off-axis aspherical mirrors by the stressed methodAppl. Opt.2015542291298

Y. Han and L. LuStressed mirror polishing: finite element simulation of mirror blank deformationProc. SPIE2014928192810W

E. Hugot, A. Bernard, M. Laslandes, J. Floriot, T. Dufour, D. Fappani, J. M. Combes, and M. FerrariStress polishing demonstrator for ELT M1 segments and industrializationProc. SPIE20149145914539

R. Izazaga-Pérez, D. Aguirre-Aguirre, F. Granados-Agustín, and M. Percino-ZacaríasOptical testing and finite element analysis applied in stressed mirror polishingProc. OSA2014OM3C.6

L. Xin-nan, Z. Hai-ying, C. Xiang-qun, J. Zi-bo, Z. Yi, L. Xing-tao, and N. Hou-kunStudy on the stressed mirror polishing with a continuous polishing machine for large aperture off-axis aspheric mirrorsChin. Astron. Astrophys2012364435444

C. Pruss, E. Garbusi, and W. OstenTesting aspheresOpt. Photon. News20081942429

S. P. Timoshenko and S. Woinowsky-KrigerTHEORY OF PLATES AND SHELLSMcGraw-Hill1959

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