非ひ球きゅう面めん

noun

aspherical surface

Technical term in optics and lens design for a surface that is not part of a sphere.

• このレンズは非ひ球きゅう面めんを採さい用ようしている。

  This lens uses an aspherical surface.

noun which may take the genitive case particle 'no'

aspherical

Used attributively with の to describe lenses, mirrors, or optical elements that are not spherical.

• 非ひ球きゅう