noun
corner cube; corner reflector
Technical term in optics; a retroreflector consisting of three mutually perpendicular reflecting surfaces.
レーザー測距では、コーナーキューブを使って光を正確に反射させる。
In laser ranging, a corner cube is used to reflect light precisely.
Variant with interpunct; less common in running text.
Loanword from English 'corner cube'.