fold sphere

Noun

A fold mirror that is a "sphere", i.e. a spherical mirror

Japanese Meaning

折りたたみ機構を持った球面ミラー

The engineer inspected the fold sphere before installing it on the satellite.

技術者は衛星に取り付ける前に折りたたみ式球面鏡を点検した。

Sense（1）

A fold mirror that is a "sphere", i.e. a spherical mirror

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