Computer generated holograms design in null testing of optical freeform surfaces

Ya Huang; Jun Ma; Rihong Zhu; Hua Shen

doi:10.1117/12.2021053

22 June 2013 Computer generated holograms design in null testing of optical freeform surfaces

Ya Huang, Jun Ma, Rihong Zhu, Hua Shen

Proceedings Volume 8769, International Conference on Optics in Precision Engineering and Nanotechnology (icOPEN2013); 876934 (2013) https://doi.org/10.1117/12.2021053
Event: International Conference on Optics in Precision Engineering and Nanotechnology (icOPEN2013), 2013, Singapore, Singapore

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.

Citation Download Citation

Ya Huang, Jun Ma, Rihong Zhu, and Hua Shen "Computer generated holograms design in null testing of optical freeform surfaces", Proc. SPIE 8769, International Conference on Optics in Precision Engineering and Nanotechnology (icOPEN2013), 876934 (22 June 2013); https://doi.org/10.1117/12.2021053

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KEYWORDS

Computer generated holography

Aspheric lenses

Freeform optics

Wavefronts

Ray tracing

Zemax

Diffraction

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