fold sphere

fold sphere

1. A fold mirror that is a "sphere", i.e. a spherical mirror
   • 2006 July, Burge et al., “Design and analysis for interferometric measurements of the GMT primary mirror segments”, in Proceedings of SPIE, volume 6273, →DOI, retrieved 27 December 2021, pages 62730M-5:

     Center of curvature for the 3.75-m fold sphere is accessible for in situ testing of this mirror.

• fold flat