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.

• 非ひ球きゅう面めんレンズは球きゅう面めん収しゅう差さを補ほ正せいできる。

  Aspherical lenses can correct spherical aberration.