Methods to define circular off-axis aspheric segment mirrors

Jeong-Yeol Han; Sukmock Lee

doi:10.1117/12.2322707

14 September 2018 Methods to define circular off-axis aspheric segment mirrors

Jeong-Yeol Han, Sukmock Lee

Author Affiliations +

Proceedings Volume 10742, Optical Manufacturing and Testing XII; 107421I (2018) https://doi.org/10.1117/12.2322707
Event: SPIE Optical Engineering + Applications, 2018, San Diego, California, United States

Abstract

We investigated the definition for circular off-axis aspheric mirrors (COAMs). The clear opening of the COAM obtained by projecting a circular aperture on the aspheric surface does not form a plane but a curved surface. To avoid ambiguity due to the non-planar opening, we propose to use a plane to cut the aspheric surface to obtain a COAM. The COAM has three characteristics: 1) an elliptical opening; 2) the major axis of the opening lies on the meridional plane containing the original optical axis of the aspheric surface, and the minor axis lies on the sagittal plane perpendicular to the meridian plane; and 3) it is not deepest at the center of the ellipse. The third characteristic suggests two methods for defining the COAM using a plane: 1) with the center of the elliptical opening as a reference and 2) with the deepest point of the mirror as a reference. All the formulas required to obtain the desired COAM using the two methods are presented.

Citation Download Citation

Jeong-Yeol Han and Sukmock Lee "Methods to define circular off-axis aspheric segment mirrors", Proc. SPIE 10742, Optical Manufacturing and Testing XII, 107421I (14 September 2018); https://doi.org/10.1117/12.2322707

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