Patent ID: 9395545
Filing Date: 2016-07-19
CPC Classification: G02B,H01L

Claim Text:
1. An apparatus for use in an optical system, comprising: a light source adapted to provide illumination having a first numerical aperture; a first aperture member having a first aperture illuminated by the light source and adapted to form an image; a second aperture member having a second aperture disposed downstream from the first aperture; and a relay optic having a second numerical aperture defined by the second aperture, wherein a geometry of the second aperture has a dimension in a first direction adapted to match a ratio of the first numerical aperture at the first aperture to the second numerical aperture of the relay optic and wherein the geometry of the second aperture has a dimension in a second direction perpendicular to the first direction adapted to match the ratio of the first numerical aperture at the first aperture to the second numerical aperture of the relay optic.