Projection moire technique for contouring injection-molded parabolic reflectors

Andrew H. Fagg; Bryan S. Hales; H. Philip Stahl

doi:10.1117/12.140940

2 September 1992 Projection moire technique for contouring injection-molded parabolic reflectors

Andrew H. Fagg, Bryan S. Hales, H. Philip Stahl

Proceedings Volume 1779, Optical Design and Processing Technologies and Applications; (1992) https://doi.org/10.1117/12.140940
Event: Optical Engineering Midwest 1992, 1992, Chicago, IL, United States

Abstract

Testing injection molded aspheres, with large deviations from spherical is difficult. One solution is to use a long wavelength interferometer, such as an infrared interferometer. Another solution is to use moire. This paper presents the use of a projection moire system to test the surface shape of an injection molded f/0.1 parabolic reflector. The theory of moire and its effective wavelength is presented. A projection system is constructed and data taken for a reflector is shown. Finally, some alignment errors associated with the system and how to correct them is presented.

Citation Download Citation

Andrew H. Fagg, Bryan S. Hales, and H. Philip Stahl "Projection moire technique for contouring injection-molded parabolic reflectors", Proc. SPIE 1779, Optical Design and Processing Technologies and Applications, (2 September 1992); https://doi.org/10.1117/12.140940

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