Terms for subject Optics

German	English
schief einfallendes Licht	oblique illumination
schiefes Bündel	oblique pencil (light bundle)
schiefes Lichtbündel	oblique light beam
schiefes Strahlenbündel	oblique bundle of rays
unter schiefen Winkeln zueinander orientieren	orient at oblique angles to each other