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21 May 2009 Design and fabrication for the diffractive optical element of an infrared system
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Proceedings Volume 7282, 4th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies; 72822B (2009) https://doi.org/10.1117/12.830909
Event: AOMATT 2008 - 4th International Symposium on Advanced Optical Manufacturing, 2008, Chengdu, Chengdu, China
Abstract
A diffractive/refractive system with a relative aperture of f/4.0, the EFL of 150mm at 3.7-4.8μm is designed. A diffractive optical element (DOE) is fabricated by means of diamond turning on a conic substrate of the Germanium lens in this system. The characteristics of the diffractive optical element are analyzed in the software of Diffsys. And the zone radius of DOE and step height are detected by profilometry and result is produced. Test results of DOE are coincided with the design figures and the DOE has tiny surface error and high diffractive efficiency. Result of Modulation Transfer Function (MTF) for the system is tested by Ealing and the tested value is closely approximate to diffractive limit. The DOE has better behaviour of chromatic aberration and athermalization.
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Changcheng Yang, Shenghui Li, Yong Li, and Bin Wang "Design and fabrication for the diffractive optical element of an infrared system", Proc. SPIE 7282, 4th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies, 72822B (21 May 2009); https://doi.org/10.1117/12.830909
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