noun
oblique incidence
Technical term used in physics and engineering when a wave or beam strikes a surface at an angle other than perpendicular.
斜め入射の場合、反射角は入射角に等しい。
In the case of oblique incidence, the angle of reflection equals the angle of incidence.
このレンズは斜め入射光に対して収差が少ない。
This lens has low aberration for obliquely incident light.
Compound of 斜め (oblique) and 入射 (incidence). A straightforward technical term with no special historical derivation.