公开(公告)号：WO2021202132A1

公开(公告)日：2021-10-07

申请号：PCT/US2021/023380

申请日：2021-03-22

Applicant: CORNING INCORPORATED

Inventor： BERG, David Matthew

IPC: G02B26/00 ,  G01B11/16 ,  G01J3/447 ,  G01N21/23 ,  G01J3/0208 ,  G01J3/0235 ,  G01J3/32 ,  G01N21/251 ,  G01N21/552 ,  G02B2207/117 ,  G02B26/008 ,  G02B5/04 ,  G02B5/208 ,  G02B7/006

Abstract: The focus-corrected optical filter apparatus includes multiple optical filter assemblies supported by a movable support member. Each optical filter assembly includes an optical filter and a corrector that form a filter-corrector pair that move together with the support member. Each corrector is formed to compensate for the adverse effects of chromatic aberration of a focusing lens at the given wavelength of the corresponding optical filter in the filter-corrector pair. Example correctors are flat glass plates with different thicknesses. The focus-corrected optical filter apparatus is arranged so that the different optical filter assemblies can be sequentially inserted into the optical path of a focused multi-wavelength light beam to sequentially form substantially monochromatic focused light beams having the different wavelengths but have the same focus position.