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Proceedings Paper

Computer generated holograms design in null testing of optical freeform surfaces
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Paper Abstract

Optical freeform surfaces are complex surfaces with non-rotational symmetry that break through the limitations of conventional optical element, and are widely used in advanced optics application for system configuration simplifying and performance enhancing. Due to the geometrical complexity and optical particularity of optical freeform surfaces, there is, as yet, a lack of precision freeform surfaces testing. Computer generated hologram (CGH) null testing method are discussed in this paper to test the optical freeform surfaces such as off-axis aspheric surfaces. CGH design based on ray tracing and NURBS interpolation are included. Simuation in Zemax is given to verify the result of calculation. The alignment and fiducial sections are added to the CGH to lead the alignment of the freeform surface and CGH with sixdimensional adjustment. The CGH was designed and fabricated to test an off-axis aspheric with Fizeau configuration.

Paper Details

Date Published: 22 June 2013
PDF: 8 pages
Proc. SPIE 8769, International Conference on Optics in Precision Engineering and Nanotechnology (icOPEN2013), 876934 (22 June 2013); doi: 10.1117/12.2021053
Show Author Affiliations
Ya Huang, Nanjing Univ. of Science and Technology (China)
Jun Ma, Nanjing Univ. of Science and Technology (China)
Rihong Zhu, Nanjing Univ. of Science and Technology (China)
Hua Shen, Nanjing Univ. of Science and Technology (China)


Published in SPIE Proceedings Vol. 8769:
International Conference on Optics in Precision Engineering and Nanotechnology (icOPEN2013)
Chenggen Quan; Kemao Qian; Anand Asundi, Editor(s)

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