Assertion: telescope's light | /r/HasProperty | fresnel-diffracted
Facets:
value: around the external occulter
type: LOCATION
Source sentences:
text: The LASCO C-3 coronagraph uses both an external occulter (which casts shadow on the instrument) and an internal occulter (which blocks stray light that is Fresnel-diffracted around the external occulter) to reduce this leakage, and a complicated system of baffles to eliminate stray light scattering off the internal surfaces of the instrument itself.