像ぞう面めん湾わん曲きょく

noun

curvature of field; field curvature

Technical term in optics referring to the aberration where a flat object produces a curved image surface.

• レンズ設せっ計けいでは像ぞう面めん湾わん曲きょくを補ほ正せいすることが重じゅう要ようだ。

  In lens design, it is important to correct field curvature.